From 597de0e29841aa6c738eb40454620bc30d44099a Mon Sep 17 00:00:00 2001
From: Ryan
Date: Thu, 4 Jan 2024 17:05:37 +1100
Subject: LED drivers: rename "simple" to "mono" (#22814)

---
 drivers/led/issi/is31fl3218-mono.c    | 146 ++++++++++
 drivers/led/issi/is31fl3218-mono.h    |  75 +++++
 drivers/led/issi/is31fl3218-simple.c  | 146 ----------
 drivers/led/issi/is31fl3218-simple.h  |  75 -----
 drivers/led/issi/is31fl3731-mono.c    | 239 ++++++++++++++++
 drivers/led/issi/is31fl3731-mono.h    | 283 +++++++++++++++++++
 drivers/led/issi/is31fl3731-simple.c  | 239 ----------------
 drivers/led/issi/is31fl3731-simple.h  | 283 -------------------
 drivers/led/issi/is31fl3733-mono.c    | 270 ++++++++++++++++++
 drivers/led/issi/is31fl3733-mono.h    | 367 ++++++++++++++++++++++++
 drivers/led/issi/is31fl3733-simple.c  | 270 ------------------
 drivers/led/issi/is31fl3733-simple.h  | 367 ------------------------
 drivers/led/issi/is31fl3736-mono.c    | 244 ++++++++++++++++
 drivers/led/issi/is31fl3736-mono.h    | 262 +++++++++++++++++
 drivers/led/issi/is31fl3736-simple.c  | 244 ----------------
 drivers/led/issi/is31fl3736-simple.h  | 262 -----------------
 drivers/led/issi/is31fl3737-mono.c    | 241 ++++++++++++++++
 drivers/led/issi/is31fl3737-mono.h    | 300 ++++++++++++++++++++
 drivers/led/issi/is31fl3737-simple.c  | 241 ----------------
 drivers/led/issi/is31fl3737-simple.h  | 300 --------------------
 drivers/led/issi/is31fl3741-mono.c    | 271 ++++++++++++++++++
 drivers/led/issi/is31fl3741-mono.h    | 517 ++++++++++++++++++++++++++++++++++
 drivers/led/issi/is31fl3741-simple.c  | 271 ------------------
 drivers/led/issi/is31fl3741-simple.h  | 517 ----------------------------------
 drivers/led/issi/is31fl3742a-mono.c   | 206 ++++++++++++++
 drivers/led/issi/is31fl3742a-mono.h   | 297 +++++++++++++++++++
 drivers/led/issi/is31fl3742a-simple.c | 206 --------------
 drivers/led/issi/is31fl3742a-simple.h | 297 -------------------
 drivers/led/issi/is31fl3743a-mono.c   | 216 ++++++++++++++
 drivers/led/issi/is31fl3743a-mono.h   | 329 ++++++++++++++++++++++
 drivers/led/issi/is31fl3743a-simple.c | 216 --------------
 drivers/led/issi/is31fl3743a-simple.h | 329 ----------------------
 drivers/led/issi/is31fl3745-mono.c    | 216 ++++++++++++++
 drivers/led/issi/is31fl3745-mono.h    | 272 ++++++++++++++++++
 drivers/led/issi/is31fl3745-simple.c  | 216 --------------
 drivers/led/issi/is31fl3745-simple.h  | 272 ------------------
 drivers/led/issi/is31fl3746a-mono.c   | 208 ++++++++++++++
 drivers/led/issi/is31fl3746a-mono.h   | 192 +++++++++++++
 drivers/led/issi/is31fl3746a-simple.c | 208 --------------
 drivers/led/issi/is31fl3746a-simple.h | 192 -------------
 drivers/led/snled27351-mono.c         | 272 ++++++++++++++++++
 drivers/led/snled27351-mono.h         | 381 +++++++++++++++++++++++++
 drivers/led/snled27351-simple.c       | 272 ------------------
 drivers/led/snled27351-simple.h       | 381 -------------------------
 44 files changed, 5804 insertions(+), 5804 deletions(-)
 create mode 100644 drivers/led/issi/is31fl3218-mono.c
 create mode 100644 drivers/led/issi/is31fl3218-mono.h
 delete mode 100644 drivers/led/issi/is31fl3218-simple.c
 delete mode 100644 drivers/led/issi/is31fl3218-simple.h
 create mode 100644 drivers/led/issi/is31fl3731-mono.c
 create mode 100644 drivers/led/issi/is31fl3731-mono.h
 delete mode 100644 drivers/led/issi/is31fl3731-simple.c
 delete mode 100644 drivers/led/issi/is31fl3731-simple.h
 create mode 100644 drivers/led/issi/is31fl3733-mono.c
 create mode 100644 drivers/led/issi/is31fl3733-mono.h
 delete mode 100644 drivers/led/issi/is31fl3733-simple.c
 delete mode 100644 drivers/led/issi/is31fl3733-simple.h
 create mode 100644 drivers/led/issi/is31fl3736-mono.c
 create mode 100644 drivers/led/issi/is31fl3736-mono.h
 delete mode 100644 drivers/led/issi/is31fl3736-simple.c
 delete mode 100644 drivers/led/issi/is31fl3736-simple.h
 create mode 100644 drivers/led/issi/is31fl3737-mono.c
 create mode 100644 drivers/led/issi/is31fl3737-mono.h
 delete mode 100644 drivers/led/issi/is31fl3737-simple.c
 delete mode 100644 drivers/led/issi/is31fl3737-simple.h
 create mode 100644 drivers/led/issi/is31fl3741-mono.c
 create mode 100644 drivers/led/issi/is31fl3741-mono.h
 delete mode 100644 drivers/led/issi/is31fl3741-simple.c
 delete mode 100644 drivers/led/issi/is31fl3741-simple.h
 create mode 100644 drivers/led/issi/is31fl3742a-mono.c
 create mode 100644 drivers/led/issi/is31fl3742a-mono.h
 delete mode 100644 drivers/led/issi/is31fl3742a-simple.c
 delete mode 100644 drivers/led/issi/is31fl3742a-simple.h
 create mode 100644 drivers/led/issi/is31fl3743a-mono.c
 create mode 100644 drivers/led/issi/is31fl3743a-mono.h
 delete mode 100644 drivers/led/issi/is31fl3743a-simple.c
 delete mode 100644 drivers/led/issi/is31fl3743a-simple.h
 create mode 100644 drivers/led/issi/is31fl3745-mono.c
 create mode 100644 drivers/led/issi/is31fl3745-mono.h
 delete mode 100644 drivers/led/issi/is31fl3745-simple.c
 delete mode 100644 drivers/led/issi/is31fl3745-simple.h
 create mode 100644 drivers/led/issi/is31fl3746a-mono.c
 create mode 100644 drivers/led/issi/is31fl3746a-mono.h
 delete mode 100644 drivers/led/issi/is31fl3746a-simple.c
 delete mode 100644 drivers/led/issi/is31fl3746a-simple.h
 create mode 100644 drivers/led/snled27351-mono.c
 create mode 100644 drivers/led/snled27351-mono.h
 delete mode 100644 drivers/led/snled27351-simple.c
 delete mode 100644 drivers/led/snled27351-simple.h

(limited to 'drivers/led')

diff --git a/drivers/led/issi/is31fl3218-mono.c b/drivers/led/issi/is31fl3218-mono.c
new file mode 100644
index 0000000000..ad818f98b1
--- /dev/null
+++ b/drivers/led/issi/is31fl3218-mono.c
@@ -0,0 +1,146 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "is31fl3218-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+
+#define IS31FL3218_PWM_REGISTER_COUNT 18
+#define IS31FL3218_LED_CONTROL_REGISTER_COUNT 3
+
+#ifndef IS31FL3218_I2C_TIMEOUT
+#    define IS31FL3218_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3218_I2C_PERSISTENCE
+#    define IS31FL3218_I2C_PERSISTENCE 0
+#endif
+
+uint8_t i2c_transfer_buffer[20];
+
+// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
+uint8_t g_pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required = false;
+
+uint8_t g_led_control_registers[IS31FL3218_LED_CONTROL_REGISTER_COUNT] = {0};
+bool    g_led_control_registers_update_required                        = false;
+
+void is31fl3218_write_register(uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+#if IS31FL3218_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3218_write_pwm_buffer(uint8_t *pwm_buffer) {
+    i2c_transfer_buffer[0] = IS31FL3218_REG_PWM;
+    memcpy(i2c_transfer_buffer + 1, pwm_buffer, 18);
+
+#if IS31FL3218_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
+        i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT);
+    }
+#else
+    i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3218_init(void) {
+    i2c_init();
+
+    // In case we ever want to reinitialize (?)
+    is31fl3218_write_register(IS31FL3218_REG_RESET, 0x00);
+
+    // Turn off software shutdown
+    is31fl3218_write_register(IS31FL3218_REG_SHUTDOWN, 0x01);
+
+    // Set all PWM values to zero
+    for (uint8_t i = 0; i < IS31FL3218_PWM_REGISTER_COUNT; i++) {
+        is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00);
+    }
+
+    // turn off all LEDs in the LED control register
+    for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
+        is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, 0x00);
+    }
+
+    // Load PWM registers and LED Control register data
+    is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
+
+    for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
+        is31fl3218_set_led_control_register(i, true);
+    }
+
+    is31fl3218_update_led_control_registers();
+}
+
+void is31fl3218_set_value(int index, uint8_t value) {
+    is31fl3218_led_t led;
+    if (index >= 0 && index < IS31FL3218_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
+    }
+    if (g_pwm_buffer[led.v - IS31FL3218_REG_PWM] == value) {
+        return;
+    }
+    g_pwm_buffer[led.v - IS31FL3218_REG_PWM] = value;
+    g_pwm_buffer_update_required             = true;
+}
+
+void is31fl3218_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
+        is31fl3218_set_value(i, value);
+    }
+}
+
+void is31fl3218_set_led_control_register(uint8_t index, bool value) {
+    is31fl3218_led_t led;
+    memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
+
+    uint8_t control_register = (led.v - IS31FL3218_REG_PWM) / 6;
+    uint8_t bit_value        = (led.v - IS31FL3218_REG_PWM) % 6;
+
+    if (value) {
+        g_led_control_registers[control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required = true;
+}
+
+void is31fl3218_update_pwm_buffers(void) {
+    if (g_pwm_buffer_update_required) {
+        is31fl3218_write_pwm_buffer(g_pwm_buffer);
+        // Load PWM registers and LED Control register data
+        is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
+
+        g_pwm_buffer_update_required = false;
+    }
+}
+
+void is31fl3218_update_led_control_registers(void) {
+    if (g_led_control_registers_update_required) {
+        for (int i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
+            is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, g_led_control_registers[i]);
+        }
+
+        g_led_control_registers_update_required = false;
+    }
+}
diff --git a/drivers/led/issi/is31fl3218-mono.h b/drivers/led/issi/is31fl3218-mono.h
new file mode 100644
index 0000000000..e0a71f1387
--- /dev/null
+++ b/drivers/led/issi/is31fl3218-mono.h
@@ -0,0 +1,75 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+#define IS31FL3218_REG_SHUTDOWN 0x00
+#define IS31FL3218_REG_PWM 0x01
+#define IS31FL3218_REG_LED_CONTROL_1 0x13
+#define IS31FL3218_REG_LED_CONTROL_2 0x14
+#define IS31FL3218_REG_LED_CONTROL_3 0x15
+#define IS31FL3218_REG_UPDATE 0x16
+#define IS31FL3218_REG_RESET 0x17
+
+#define IS31FL3218_I2C_ADDRESS 0x54
+
+#if defined(LED_MATRIX_IS31FL3218)
+#    define IS31FL3218_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+typedef struct is31fl3218_led_t {
+    uint8_t v;
+} PACKED is31fl3218_led_t;
+
+extern const is31fl3218_led_t PROGMEM g_is31fl3218_leds[IS31FL3218_LED_COUNT];
+
+void is31fl3218_init(void);
+
+void is31fl3218_write_register(uint8_t reg, uint8_t data);
+
+void is31fl3218_set_value(int index, uint8_t value);
+
+void is31fl3218_set_value_all(uint8_t value);
+
+void is31fl3218_set_led_control_register(uint8_t index, bool value);
+
+void is31fl3218_update_pwm_buffers(void);
+
+void is31fl3218_update_led_control_registers(void);
+
+#define OUT1 0x01
+#define OUT2 0x02
+#define OUT3 0x03
+#define OUT4 0x04
+#define OUT5 0x05
+#define OUT6 0x06
+#define OUT7 0x07
+#define OUT8 0x08
+#define OUT9 0x09
+#define OUT10 0x0A
+#define OUT11 0x0B
+#define OUT12 0x0C
+#define OUT13 0x0D
+#define OUT14 0x0E
+#define OUT15 0x0F
+#define OUT16 0x10
+#define OUT17 0x11
+#define OUT18 0x12
diff --git a/drivers/led/issi/is31fl3218-simple.c b/drivers/led/issi/is31fl3218-simple.c
deleted file mode 100644
index d9faa8677d..0000000000
--- a/drivers/led/issi/is31fl3218-simple.c
+++ /dev/null
@@ -1,146 +0,0 @@
-/* Copyright 2018 Jason Williams (Wilba)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "is31fl3218-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-
-#define IS31FL3218_PWM_REGISTER_COUNT 18
-#define IS31FL3218_LED_CONTROL_REGISTER_COUNT 3
-
-#ifndef IS31FL3218_I2C_TIMEOUT
-#    define IS31FL3218_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3218_I2C_PERSISTENCE
-#    define IS31FL3218_I2C_PERSISTENCE 0
-#endif
-
-uint8_t i2c_transfer_buffer[20];
-
-// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
-uint8_t g_pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required = false;
-
-uint8_t g_led_control_registers[IS31FL3218_LED_CONTROL_REGISTER_COUNT] = {0};
-bool    g_led_control_registers_update_required                        = false;
-
-void is31fl3218_write_register(uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-#if IS31FL3218_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 2, IS31FL3218_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3218_write_pwm_buffer(uint8_t *pwm_buffer) {
-    i2c_transfer_buffer[0] = IS31FL3218_REG_PWM;
-    memcpy(i2c_transfer_buffer + 1, pwm_buffer, 18);
-
-#if IS31FL3218_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
-        i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT);
-    }
-#else
-    i2c_transmit(IS31FL3218_I2C_ADDRESS << 1, i2c_transfer_buffer, 19, IS31FL3218_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3218_init(void) {
-    i2c_init();
-
-    // In case we ever want to reinitialize (?)
-    is31fl3218_write_register(IS31FL3218_REG_RESET, 0x00);
-
-    // Turn off software shutdown
-    is31fl3218_write_register(IS31FL3218_REG_SHUTDOWN, 0x01);
-
-    // Set all PWM values to zero
-    for (uint8_t i = 0; i < IS31FL3218_PWM_REGISTER_COUNT; i++) {
-        is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00);
-    }
-
-    // turn off all LEDs in the LED control register
-    for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, 0x00);
-    }
-
-    // Load PWM registers and LED Control register data
-    is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
-
-    for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
-        is31fl3218_set_led_control_register(i, true);
-    }
-
-    is31fl3218_update_led_control_registers();
-}
-
-void is31fl3218_set_value(int index, uint8_t value) {
-    is31fl3218_led_t led;
-    if (index >= 0 && index < IS31FL3218_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
-    }
-    if (g_pwm_buffer[led.v - IS31FL3218_REG_PWM] == value) {
-        return;
-    }
-    g_pwm_buffer[led.v - IS31FL3218_REG_PWM] = value;
-    g_pwm_buffer_update_required             = true;
-}
-
-void is31fl3218_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
-        is31fl3218_set_value(i, value);
-    }
-}
-
-void is31fl3218_set_led_control_register(uint8_t index, bool value) {
-    is31fl3218_led_t led;
-    memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
-
-    uint8_t control_register = (led.v - IS31FL3218_REG_PWM) / 6;
-    uint8_t bit_value        = (led.v - IS31FL3218_REG_PWM) % 6;
-
-    if (value) {
-        g_led_control_registers[control_register] |= (1 << bit_value);
-    } else {
-        g_led_control_registers[control_register] &= ~(1 << bit_value);
-    }
-
-    g_led_control_registers_update_required = true;
-}
-
-void is31fl3218_update_pwm_buffers(void) {
-    if (g_pwm_buffer_update_required) {
-        is31fl3218_write_pwm_buffer(g_pwm_buffer);
-        // Load PWM registers and LED Control register data
-        is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
-
-        g_pwm_buffer_update_required = false;
-    }
-}
-
-void is31fl3218_update_led_control_registers(void) {
-    if (g_led_control_registers_update_required) {
-        for (int i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, g_led_control_registers[i]);
-        }
-
-        g_led_control_registers_update_required = false;
-    }
-}
diff --git a/drivers/led/issi/is31fl3218-simple.h b/drivers/led/issi/is31fl3218-simple.h
deleted file mode 100644
index e0a71f1387..0000000000
--- a/drivers/led/issi/is31fl3218-simple.h
+++ /dev/null
@@ -1,75 +0,0 @@
-/* Copyright 2018 Jason Williams (Wilba)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-#define IS31FL3218_REG_SHUTDOWN 0x00
-#define IS31FL3218_REG_PWM 0x01
-#define IS31FL3218_REG_LED_CONTROL_1 0x13
-#define IS31FL3218_REG_LED_CONTROL_2 0x14
-#define IS31FL3218_REG_LED_CONTROL_3 0x15
-#define IS31FL3218_REG_UPDATE 0x16
-#define IS31FL3218_REG_RESET 0x17
-
-#define IS31FL3218_I2C_ADDRESS 0x54
-
-#if defined(LED_MATRIX_IS31FL3218)
-#    define IS31FL3218_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-typedef struct is31fl3218_led_t {
-    uint8_t v;
-} PACKED is31fl3218_led_t;
-
-extern const is31fl3218_led_t PROGMEM g_is31fl3218_leds[IS31FL3218_LED_COUNT];
-
-void is31fl3218_init(void);
-
-void is31fl3218_write_register(uint8_t reg, uint8_t data);
-
-void is31fl3218_set_value(int index, uint8_t value);
-
-void is31fl3218_set_value_all(uint8_t value);
-
-void is31fl3218_set_led_control_register(uint8_t index, bool value);
-
-void is31fl3218_update_pwm_buffers(void);
-
-void is31fl3218_update_led_control_registers(void);
-
-#define OUT1 0x01
-#define OUT2 0x02
-#define OUT3 0x03
-#define OUT4 0x04
-#define OUT5 0x05
-#define OUT6 0x06
-#define OUT7 0x07
-#define OUT8 0x08
-#define OUT9 0x09
-#define OUT10 0x0A
-#define OUT11 0x0B
-#define OUT12 0x0C
-#define OUT13 0x0D
-#define OUT14 0x0E
-#define OUT15 0x0F
-#define OUT16 0x10
-#define OUT17 0x11
-#define OUT18 0x12
diff --git a/drivers/led/issi/is31fl3731-mono.c b/drivers/led/issi/is31fl3731-mono.c
new file mode 100644
index 0000000000..74e427ef0d
--- /dev/null
+++ b/drivers/led/issi/is31fl3731-mono.c
@@ -0,0 +1,239 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2019 Clueboard
+ * Copyright 2021 Doni Crosby
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "is31fl3731-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3731_PWM_REGISTER_COUNT 144
+#define IS31FL3731_LED_CONTROL_REGISTER_COUNT 18
+
+#ifndef IS31FL3731_I2C_TIMEOUT
+#    define IS31FL3731_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3731_I2C_PERSISTENCE
+#    define IS31FL3731_I2C_PERSISTENCE 0
+#endif
+
+uint8_t i2c_transfer_buffer[20];
+
+// These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in is31fl3731_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[IS31FL3731_DRIVER_COUNT][IS31FL3731_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
+bool    g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT]                        = {false};
+
+void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3731_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT) == 0) {
+            break;
+        }
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3731_select_page(uint8_t addr, uint8_t page) {
+    is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, page);
+}
+
+void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // assumes page 0 is already selected
+
+    // transmit PWM registers in 9 transfers of 16 bytes
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // iterate over the pwm_buffer contents at 16 byte intervals
+    for (int i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
+        // set the first register, e.g. 0x24, 0x34, 0x44, etc.
+        i2c_transfer_buffer[0] = 0x24 + i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3731_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT) == 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3731_init_drivers(void) {
+    i2c_init();
+
+    is31fl3731_init(IS31FL3731_I2C_ADDRESS_1);
+#if defined(IS31FL3731_I2C_ADDRESS_2)
+    is31fl3731_init(IS31FL3731_I2C_ADDRESS_2);
+#    if defined(IS31FL3731_I2C_ADDRESS_3)
+    is31fl3731_init(IS31FL3731_I2C_ADDRESS_3);
+#        if defined(IS31FL3731_I2C_ADDRESS_4)
+    is31fl3731_init(IS31FL3731_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
+        is31fl3731_set_led_control_register(i, true);
+    }
+
+    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3731_I2C_ADDRESS_2)
+    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3731_I2C_ADDRESS_3)
+    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3731_I2C_ADDRESS_4)
+    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3731_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, first enable software shutdown,
+    // then set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
+
+    // enable software shutdown
+    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
+#ifdef IS31FL3731_DEGHOST // set to enable de-ghosting of the array
+    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
+#endif
+
+    // this delay was copied from other drivers, might not be needed
+    wait_ms(10);
+
+    // picture mode
+    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
+    // display frame 0
+    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
+    // audio sync off
+    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
+
+    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
+
+    // turn off all LEDs in the LED control register
+    for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
+        is31fl3731_write_register(addr, i, 0x00);
+    }
+
+    // turn off all LEDs in the blink control register (not really needed)
+    for (int i = 0x12; i <= 0x23; i++) {
+        is31fl3731_write_register(addr, i, 0x00);
+    }
+
+    // set PWM on all LEDs to 0
+    for (int i = 0x24; i <= 0xB3; i++) {
+        is31fl3731_write_register(addr, i, 0x00);
+    }
+
+    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
+
+    // disable software shutdown
+    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
+
+    // select page 0 and leave it selected.
+    // most usage after initialization is just writing PWM buffers in page 0
+    // as there's not much point in double-buffering
+    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
+}
+
+void is31fl3731_set_value(int index, uint8_t value) {
+    is31fl3731_led_t led;
+    if (index >= 0 && index < IS31FL3731_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
+
+        // Subtract 0x24 to get the second index of g_pwm_buffer
+
+        if (g_pwm_buffer[led.driver][led.v - 0x24] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v - 0x24]   = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3731_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
+        is31fl3731_set_value(i, value);
+    }
+}
+
+void is31fl3731_set_led_control_register(uint8_t index, bool value) {
+    is31fl3731_led_t led;
+    memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
+
+    uint8_t control_register = (led.v - 0x24) / 8;
+    uint8_t bit_value        = (led.v - 0x24) % 8;
+
+    if (value) {
+        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required[led.driver] = true;
+}
+
+void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3731_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
+            is31fl3731_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+        g_led_control_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3731_flush(void) {
+    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3731_I2C_ADDRESS_2)
+    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3731_I2C_ADDRESS_3)
+    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3731_I2C_ADDRESS_4)
+    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3731-mono.h b/drivers/led/issi/is31fl3731-mono.h
new file mode 100644
index 0000000000..ff970a3e5e
--- /dev/null
+++ b/drivers/led/issi/is31fl3731-mono.h
@@ -0,0 +1,283 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2019 Clueboard
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef LED_DRIVER_ADDR_1
+#    define IS31FL3731_I2C_ADDRESS_1 LED_DRIVER_ADDR_1
+#endif
+#ifdef LED_DRIVER_ADDR_2
+#    define IS31FL3731_I2C_ADDRESS_2 LED_DRIVER_ADDR_2
+#endif
+#ifdef LED_DRIVER_ADDR_3
+#    define IS31FL3731_I2C_ADDRESS_3 LED_DRIVER_ADDR_3
+#endif
+#ifdef LED_DRIVER_ADDR_4
+#    define IS31FL3731_I2C_ADDRESS_4 LED_DRIVER_ADDR_4
+#endif
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3731_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3731_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_3731_DEGHOST
+#    define IS31FL3731_DEGHOST ISSI_3731_DEGHOST
+#endif
+
+#define is31_led is31fl3731_led_t
+#define g_is31_leds g_is31fl3731_leds
+// ========
+
+#define IS31FL3731_REG_COMMAND 0xFD
+#define IS31FL3731_COMMAND_FRAME_1 0x00
+#define IS31FL3731_COMMAND_FRAME_2 0x01
+#define IS31FL3731_COMMAND_FRAME_3 0x02
+#define IS31FL3731_COMMAND_FRAME_4 0x03
+#define IS31FL3731_COMMAND_FRAME_5 0x04
+#define IS31FL3731_COMMAND_FRAME_6 0x05
+#define IS31FL3731_COMMAND_FRAME_7 0x06
+#define IS31FL3731_COMMAND_FRAME_8 0x07
+#define IS31FL3731_COMMAND_FUNCTION 0x0B
+
+#define IS31FL3731_FUNCTION_REG_CONFIG 0x00
+#define IS31FL3731_CONFIG_MODE_PICTURE 0x00
+#define IS31FL3731_CONFIG_MODE_AUTO_PLAY 0x08
+#define IS31FL3731_CONFIG_MODE_AUDIO_PLAY 0x18
+
+#define IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY 0x01
+#define IS31FL3731_FUNCTION_REG_AUDIO_SYNC 0x06
+#define IS31FL3731_FUNCTION_REG_SHUTDOWN 0x0A
+
+// Not defined in the datasheet -- See AN for IC
+#define IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION 0xC2
+#define IS31FL3731_GHOST_IMAGE_PREVENTION_GEN 0x10
+
+#define IS31FL3731_I2C_ADDRESS_GND 0x74
+#define IS31FL3731_I2C_ADDRESS_SCL 0x75
+#define IS31FL3731_I2C_ADDRESS_SDA 0x76
+#define IS31FL3731_I2C_ADDRESS_VCC 0x77
+
+#if defined(LED_MATRIX_IS31FL3731)
+#    define IS31FL3731_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined IS31FL3731_I2C_ADDRESS_4
+#    define IS31FL3731_DRIVER_COUNT 4
+#elif defined IS31FL3731_I2C_ADDRESS_3
+#    define IS31FL3731_DRIVER_COUNT 3
+#elif defined IS31FL3731_I2C_ADDRESS_2
+#    define IS31FL3731_DRIVER_COUNT 2
+#elif defined IS31FL3731_I2C_ADDRESS_1
+#    define IS31FL3731_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3731_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3731_led_t;
+
+extern const is31fl3731_led_t PROGMEM g_is31fl3731_leds[IS31FL3731_LED_COUNT];
+
+void is31fl3731_init_drivers(void);
+void is31fl3731_init(uint8_t addr);
+void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3731_select_page(uint8_t addr, uint8_t page);
+void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3731_set_value(int index, uint8_t value);
+void is31fl3731_set_value_all(uint8_t value);
+
+void is31fl3731_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index);
+
+void is31fl3731_flush(void);
+
+#define C1_1 0x24
+#define C1_2 0x25
+#define C1_3 0x26
+#define C1_4 0x27
+#define C1_5 0x28
+#define C1_6 0x29
+#define C1_7 0x2A
+#define C1_8 0x2B
+
+#define C1_9 0x2C
+#define C1_10 0x2D
+#define C1_11 0x2E
+#define C1_12 0x2F
+#define C1_13 0x30
+#define C1_14 0x31
+#define C1_15 0x32
+#define C1_16 0x33
+
+#define C2_1 0x34
+#define C2_2 0x35
+#define C2_3 0x36
+#define C2_4 0x37
+#define C2_5 0x38
+#define C2_6 0x39
+#define C2_7 0x3A
+#define C2_8 0x3B
+
+#define C2_9 0x3C
+#define C2_10 0x3D
+#define C2_11 0x3E
+#define C2_12 0x3F
+#define C2_13 0x40
+#define C2_14 0x41
+#define C2_15 0x42
+#define C2_16 0x43
+
+#define C3_1 0x44
+#define C3_2 0x45
+#define C3_3 0x46
+#define C3_4 0x47
+#define C3_5 0x48
+#define C3_6 0x49
+#define C3_7 0x4A
+#define C3_8 0x4B
+
+#define C3_9 0x4C
+#define C3_10 0x4D
+#define C3_11 0x4E
+#define C3_12 0x4F
+#define C3_13 0x50
+#define C3_14 0x51
+#define C3_15 0x52
+#define C3_16 0x53
+
+#define C4_1 0x54
+#define C4_2 0x55
+#define C4_3 0x56
+#define C4_4 0x57
+#define C4_5 0x58
+#define C4_6 0x59
+#define C4_7 0x5A
+#define C4_8 0x5B
+
+#define C4_9 0x5C
+#define C4_10 0x5D
+#define C4_11 0x5E
+#define C4_12 0x5F
+#define C4_13 0x60
+#define C4_14 0x61
+#define C4_15 0x62
+#define C4_16 0x63
+
+#define C5_1 0x64
+#define C5_2 0x65
+#define C5_3 0x66
+#define C5_4 0x67
+#define C5_5 0x68
+#define C5_6 0x69
+#define C5_7 0x6A
+#define C5_8 0x6B
+
+#define C5_9 0x6C
+#define C5_10 0x6D
+#define C5_11 0x6E
+#define C5_12 0x6F
+#define C5_13 0x70
+#define C5_14 0x71
+#define C5_15 0x72
+#define C5_16 0x73
+
+#define C6_1 0x74
+#define C6_2 0x75
+#define C6_3 0x76
+#define C6_4 0x77
+#define C6_5 0x78
+#define C6_6 0x79
+#define C6_7 0x7A
+#define C6_8 0x7B
+
+#define C6_9 0x7C
+#define C6_10 0x7D
+#define C6_11 0x7E
+#define C6_12 0x7F
+#define C6_13 0x80
+#define C6_14 0x81
+#define C6_15 0x82
+#define C6_16 0x83
+
+#define C7_1 0x84
+#define C7_2 0x85
+#define C7_3 0x86
+#define C7_4 0x87
+#define C7_5 0x88
+#define C7_6 0x89
+#define C7_7 0x8A
+#define C7_8 0x8B
+
+#define C7_9 0x8C
+#define C7_10 0x8D
+#define C7_11 0x8E
+#define C7_12 0x8F
+#define C7_13 0x90
+#define C7_14 0x91
+#define C7_15 0x92
+#define C7_16 0x93
+
+#define C8_1 0x94
+#define C8_2 0x95
+#define C8_3 0x96
+#define C8_4 0x97
+#define C8_5 0x98
+#define C8_6 0x99
+#define C8_7 0x9A
+#define C8_8 0x9B
+
+#define C8_9 0x9C
+#define C8_10 0x9D
+#define C8_11 0x9E
+#define C8_12 0x9F
+#define C8_13 0xA0
+#define C8_14 0xA1
+#define C8_15 0xA2
+#define C8_16 0xA3
+
+#define C9_1 0xA4
+#define C9_2 0xA5
+#define C9_3 0xA6
+#define C9_4 0xA7
+#define C9_5 0xA8
+#define C9_6 0xA9
+#define C9_7 0xAA
+#define C9_8 0xAB
+
+#define C9_9 0xAC
+#define C9_10 0xAD
+#define C9_11 0xAE
+#define C9_12 0xAF
+#define C9_13 0xB0
+#define C9_14 0xB1
+#define C9_15 0xB2
+#define C9_16 0xB3
diff --git a/drivers/led/issi/is31fl3731-simple.c b/drivers/led/issi/is31fl3731-simple.c
deleted file mode 100644
index 14743717d4..0000000000
--- a/drivers/led/issi/is31fl3731-simple.c
+++ /dev/null
@@ -1,239 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2019 Clueboard
- * Copyright 2021 Doni Crosby
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "is31fl3731-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3731_PWM_REGISTER_COUNT 144
-#define IS31FL3731_LED_CONTROL_REGISTER_COUNT 18
-
-#ifndef IS31FL3731_I2C_TIMEOUT
-#    define IS31FL3731_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3731_I2C_PERSISTENCE
-#    define IS31FL3731_I2C_PERSISTENCE 0
-#endif
-
-uint8_t i2c_transfer_buffer[20];
-
-// These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
-// Storing them like this is optimal for I2C transfers to the registers.
-// We could optimize this and take out the unused registers from these
-// buffers and the transfers in is31fl3731_write_pwm_buffer() but it's
-// probably not worth the extra complexity.
-uint8_t g_pwm_buffer[IS31FL3731_DRIVER_COUNT][IS31FL3731_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3731_DRIVER_COUNT] = {false};
-
-uint8_t g_led_control_registers[IS31FL3731_DRIVER_COUNT][IS31FL3731_LED_CONTROL_REGISTER_COUNT] = {0};
-bool    g_led_control_registers_update_required[IS31FL3731_DRIVER_COUNT]                        = {false};
-
-void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3731_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT) == 0) {
-            break;
-        }
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3731_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3731_select_page(uint8_t addr, uint8_t page) {
-    is31fl3731_write_register(addr, IS31FL3731_REG_COMMAND, page);
-}
-
-void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // assumes page 0 is already selected
-
-    // transmit PWM registers in 9 transfers of 16 bytes
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // iterate over the pwm_buffer contents at 16 byte intervals
-    for (int i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
-        // set the first register, e.g. 0x24, 0x34, 0x44, etc.
-        i2c_transfer_buffer[0] = 0x24 + i;
-        // copy the data from i to i+15
-        // device will auto-increment register for data after the first byte
-        // thus this sets registers 0x24-0x33, 0x34-0x43, etc. in one transfer
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3731_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT) == 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3731_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3731_init_drivers(void) {
-    i2c_init();
-
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_1);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_2);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_3);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_init(IS31FL3731_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
-        is31fl3731_set_led_control_register(i, true);
-    }
-
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_update_led_control_registers(IS31FL3731_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3731_init(uint8_t addr) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, first enable software shutdown,
-    // then set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
-
-    // enable software shutdown
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
-#ifdef IS31FL3731_DEGHOST // set to enable de-ghosting of the array
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
-#endif
-
-    // this delay was copied from other drivers, might not be needed
-    wait_ms(10);
-
-    // picture mode
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
-    // display frame 0
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
-    // audio sync off
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
-
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
-
-    // turn off all LEDs in the LED control register
-    for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3731_write_register(addr, i, 0x00);
-    }
-
-    // turn off all LEDs in the blink control register (not really needed)
-    for (int i = 0x12; i <= 0x23; i++) {
-        is31fl3731_write_register(addr, i, 0x00);
-    }
-
-    // set PWM on all LEDs to 0
-    for (int i = 0x24; i <= 0xB3; i++) {
-        is31fl3731_write_register(addr, i, 0x00);
-    }
-
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FUNCTION);
-
-    // disable software shutdown
-    is31fl3731_write_register(addr, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
-
-    // select page 0 and leave it selected.
-    // most usage after initialization is just writing PWM buffers in page 0
-    // as there's not much point in double-buffering
-    is31fl3731_select_page(addr, IS31FL3731_COMMAND_FRAME_1);
-}
-
-void is31fl3731_set_value(int index, uint8_t value) {
-    is31fl3731_led_t led;
-    if (index >= 0 && index < IS31FL3731_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
-
-        // Subtract 0x24 to get the second index of g_pwm_buffer
-
-        if (g_pwm_buffer[led.driver][led.v - 0x24] == value) {
-            return;
-        }
-        g_pwm_buffer[led.driver][led.v - 0x24]   = value;
-        g_pwm_buffer_update_required[led.driver] = true;
-    }
-}
-
-void is31fl3731_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
-        is31fl3731_set_value(i, value);
-    }
-}
-
-void is31fl3731_set_led_control_register(uint8_t index, bool value) {
-    is31fl3731_led_t led;
-    memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
-
-    uint8_t control_register = (led.v - 0x24) / 8;
-    uint8_t bit_value        = (led.v - 0x24) % 8;
-
-    if (value) {
-        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
-    } else {
-        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
-    }
-
-    g_led_control_registers_update_required[led.driver] = true;
-}
-
-void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3731_write_pwm_buffer(addr, g_pwm_buffer[index]);
-        g_pwm_buffer_update_required[index] = false;
-    }
-}
-
-void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_led_control_registers_update_required[index]) {
-        for (int i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3731_write_register(addr, i, g_led_control_registers[index][i]);
-        }
-        g_led_control_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3731_flush(void) {
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3731_I2C_ADDRESS_2)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3731_I2C_ADDRESS_3)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3731_I2C_ADDRESS_4)
-    is31fl3731_update_pwm_buffers(IS31FL3731_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3731-simple.h b/drivers/led/issi/is31fl3731-simple.h
deleted file mode 100644
index ff970a3e5e..0000000000
--- a/drivers/led/issi/is31fl3731-simple.h
+++ /dev/null
@@ -1,283 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2019 Clueboard
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-// ======== DEPRECATED DEFINES - DO NOT USE ========
-#ifdef LED_DRIVER_ADDR_1
-#    define IS31FL3731_I2C_ADDRESS_1 LED_DRIVER_ADDR_1
-#endif
-#ifdef LED_DRIVER_ADDR_2
-#    define IS31FL3731_I2C_ADDRESS_2 LED_DRIVER_ADDR_2
-#endif
-#ifdef LED_DRIVER_ADDR_3
-#    define IS31FL3731_I2C_ADDRESS_3 LED_DRIVER_ADDR_3
-#endif
-#ifdef LED_DRIVER_ADDR_4
-#    define IS31FL3731_I2C_ADDRESS_4 LED_DRIVER_ADDR_4
-#endif
-#ifdef ISSI_TIMEOUT
-#    define IS31FL3731_I2C_TIMEOUT ISSI_TIMEOUT
-#endif
-#ifdef ISSI_PERSISTENCE
-#    define IS31FL3731_I2C_PERSISTENCE ISSI_PERSISTENCE
-#endif
-#ifdef ISSI_3731_DEGHOST
-#    define IS31FL3731_DEGHOST ISSI_3731_DEGHOST
-#endif
-
-#define is31_led is31fl3731_led_t
-#define g_is31_leds g_is31fl3731_leds
-// ========
-
-#define IS31FL3731_REG_COMMAND 0xFD
-#define IS31FL3731_COMMAND_FRAME_1 0x00
-#define IS31FL3731_COMMAND_FRAME_2 0x01
-#define IS31FL3731_COMMAND_FRAME_3 0x02
-#define IS31FL3731_COMMAND_FRAME_4 0x03
-#define IS31FL3731_COMMAND_FRAME_5 0x04
-#define IS31FL3731_COMMAND_FRAME_6 0x05
-#define IS31FL3731_COMMAND_FRAME_7 0x06
-#define IS31FL3731_COMMAND_FRAME_8 0x07
-#define IS31FL3731_COMMAND_FUNCTION 0x0B
-
-#define IS31FL3731_FUNCTION_REG_CONFIG 0x00
-#define IS31FL3731_CONFIG_MODE_PICTURE 0x00
-#define IS31FL3731_CONFIG_MODE_AUTO_PLAY 0x08
-#define IS31FL3731_CONFIG_MODE_AUDIO_PLAY 0x18
-
-#define IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY 0x01
-#define IS31FL3731_FUNCTION_REG_AUDIO_SYNC 0x06
-#define IS31FL3731_FUNCTION_REG_SHUTDOWN 0x0A
-
-// Not defined in the datasheet -- See AN for IC
-#define IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION 0xC2
-#define IS31FL3731_GHOST_IMAGE_PREVENTION_GEN 0x10
-
-#define IS31FL3731_I2C_ADDRESS_GND 0x74
-#define IS31FL3731_I2C_ADDRESS_SCL 0x75
-#define IS31FL3731_I2C_ADDRESS_SDA 0x76
-#define IS31FL3731_I2C_ADDRESS_VCC 0x77
-
-#if defined(LED_MATRIX_IS31FL3731)
-#    define IS31FL3731_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined IS31FL3731_I2C_ADDRESS_4
-#    define IS31FL3731_DRIVER_COUNT 4
-#elif defined IS31FL3731_I2C_ADDRESS_3
-#    define IS31FL3731_DRIVER_COUNT 3
-#elif defined IS31FL3731_I2C_ADDRESS_2
-#    define IS31FL3731_DRIVER_COUNT 2
-#elif defined IS31FL3731_I2C_ADDRESS_1
-#    define IS31FL3731_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3731_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3731_led_t;
-
-extern const is31fl3731_led_t PROGMEM g_is31fl3731_leds[IS31FL3731_LED_COUNT];
-
-void is31fl3731_init_drivers(void);
-void is31fl3731_init(uint8_t addr);
-void is31fl3731_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3731_select_page(uint8_t addr, uint8_t page);
-void is31fl3731_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3731_set_value(int index, uint8_t value);
-void is31fl3731_set_value_all(uint8_t value);
-
-void is31fl3731_set_led_control_register(uint8_t index, bool value);
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3731_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3731_update_led_control_registers(uint8_t addr, uint8_t index);
-
-void is31fl3731_flush(void);
-
-#define C1_1 0x24
-#define C1_2 0x25
-#define C1_3 0x26
-#define C1_4 0x27
-#define C1_5 0x28
-#define C1_6 0x29
-#define C1_7 0x2A
-#define C1_8 0x2B
-
-#define C1_9 0x2C
-#define C1_10 0x2D
-#define C1_11 0x2E
-#define C1_12 0x2F
-#define C1_13 0x30
-#define C1_14 0x31
-#define C1_15 0x32
-#define C1_16 0x33
-
-#define C2_1 0x34
-#define C2_2 0x35
-#define C2_3 0x36
-#define C2_4 0x37
-#define C2_5 0x38
-#define C2_6 0x39
-#define C2_7 0x3A
-#define C2_8 0x3B
-
-#define C2_9 0x3C
-#define C2_10 0x3D
-#define C2_11 0x3E
-#define C2_12 0x3F
-#define C2_13 0x40
-#define C2_14 0x41
-#define C2_15 0x42
-#define C2_16 0x43
-
-#define C3_1 0x44
-#define C3_2 0x45
-#define C3_3 0x46
-#define C3_4 0x47
-#define C3_5 0x48
-#define C3_6 0x49
-#define C3_7 0x4A
-#define C3_8 0x4B
-
-#define C3_9 0x4C
-#define C3_10 0x4D
-#define C3_11 0x4E
-#define C3_12 0x4F
-#define C3_13 0x50
-#define C3_14 0x51
-#define C3_15 0x52
-#define C3_16 0x53
-
-#define C4_1 0x54
-#define C4_2 0x55
-#define C4_3 0x56
-#define C4_4 0x57
-#define C4_5 0x58
-#define C4_6 0x59
-#define C4_7 0x5A
-#define C4_8 0x5B
-
-#define C4_9 0x5C
-#define C4_10 0x5D
-#define C4_11 0x5E
-#define C4_12 0x5F
-#define C4_13 0x60
-#define C4_14 0x61
-#define C4_15 0x62
-#define C4_16 0x63
-
-#define C5_1 0x64
-#define C5_2 0x65
-#define C5_3 0x66
-#define C5_4 0x67
-#define C5_5 0x68
-#define C5_6 0x69
-#define C5_7 0x6A
-#define C5_8 0x6B
-
-#define C5_9 0x6C
-#define C5_10 0x6D
-#define C5_11 0x6E
-#define C5_12 0x6F
-#define C5_13 0x70
-#define C5_14 0x71
-#define C5_15 0x72
-#define C5_16 0x73
-
-#define C6_1 0x74
-#define C6_2 0x75
-#define C6_3 0x76
-#define C6_4 0x77
-#define C6_5 0x78
-#define C6_6 0x79
-#define C6_7 0x7A
-#define C6_8 0x7B
-
-#define C6_9 0x7C
-#define C6_10 0x7D
-#define C6_11 0x7E
-#define C6_12 0x7F
-#define C6_13 0x80
-#define C6_14 0x81
-#define C6_15 0x82
-#define C6_16 0x83
-
-#define C7_1 0x84
-#define C7_2 0x85
-#define C7_3 0x86
-#define C7_4 0x87
-#define C7_5 0x88
-#define C7_6 0x89
-#define C7_7 0x8A
-#define C7_8 0x8B
-
-#define C7_9 0x8C
-#define C7_10 0x8D
-#define C7_11 0x8E
-#define C7_12 0x8F
-#define C7_13 0x90
-#define C7_14 0x91
-#define C7_15 0x92
-#define C7_16 0x93
-
-#define C8_1 0x94
-#define C8_2 0x95
-#define C8_3 0x96
-#define C8_4 0x97
-#define C8_5 0x98
-#define C8_6 0x99
-#define C8_7 0x9A
-#define C8_8 0x9B
-
-#define C8_9 0x9C
-#define C8_10 0x9D
-#define C8_11 0x9E
-#define C8_12 0x9F
-#define C8_13 0xA0
-#define C8_14 0xA1
-#define C8_15 0xA2
-#define C8_16 0xA3
-
-#define C9_1 0xA4
-#define C9_2 0xA5
-#define C9_3 0xA6
-#define C9_4 0xA7
-#define C9_5 0xA8
-#define C9_6 0xA9
-#define C9_7 0xAA
-#define C9_8 0xAB
-
-#define C9_9 0xAC
-#define C9_10 0xAD
-#define C9_11 0xAE
-#define C9_12 0xAF
-#define C9_13 0xB0
-#define C9_14 0xB1
-#define C9_15 0xB2
-#define C9_16 0xB3
diff --git a/drivers/led/issi/is31fl3733-mono.c b/drivers/led/issi/is31fl3733-mono.c
new file mode 100644
index 0000000000..95d16bc4a3
--- /dev/null
+++ b/drivers/led/issi/is31fl3733-mono.c
@@ -0,0 +1,270 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
+ * Copyright 2021 Leo Deng
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "is31fl3733-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3733_PWM_REGISTER_COUNT 192
+#define IS31FL3733_LED_CONTROL_REGISTER_COUNT 24
+
+#ifndef IS31FL3733_I2C_TIMEOUT
+#    define IS31FL3733_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3733_I2C_PERSISTENCE
+#    define IS31FL3733_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3733_PWM_FREQUENCY
+#    define IS31FL3733_PWM_FREQUENCY IS31FL3733_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3733B only
+#endif
+
+#ifndef IS31FL3733_SW_PULLUP
+#    define IS31FL3733_SW_PULLUP IS31FL3733_PUR_0_OHM
+#endif
+
+#ifndef IS31FL3733_CS_PULLDOWN
+#    define IS31FL3733_CS_PULLDOWN IS31FL3733_PDR_0_OHM
+#endif
+
+#ifndef IS31FL3733_GLOBAL_CURRENT
+#    define IS31FL3733_GLOBAL_CURRENT 0xFF
+#endif
+
+#ifndef IS31FL3733_SYNC_1
+#    define IS31FL3733_SYNC_1 IS31FL3733_SYNC_NONE
+#endif
+#ifndef IS31FL3733_SYNC_2
+#    define IS31FL3733_SYNC_2 IS31FL3733_SYNC_NONE
+#endif
+#ifndef IS31FL3733_SYNC_3
+#    define IS31FL3733_SYNC_3 IS31FL3733_SYNC_NONE
+#endif
+#ifndef IS31FL3733_SYNC_4
+#    define IS31FL3733_SYNC_4 IS31FL3733_SYNC_NONE
+#endif
+
+uint8_t i2c_transfer_buffer[20];
+
+// These buffers match the IS31FL3733 PWM registers.
+// The control buffers match the page 0 LED On/Off registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in is31fl3733_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[IS31FL3733_DRIVER_COUNT][IS31FL3733_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
+bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
+
+bool is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    // If the transaction fails function returns false.
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3733_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3733_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3733_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+    }
+#else
+    if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3733_I2C_TIMEOUT) != 0) {
+        return false;
+    }
+#endif
+    return true;
+}
+
+void is31fl3733_select_page(uint8_t addr, uint8_t page) {
+    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, page);
+}
+
+bool is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 1 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3733_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3733_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3733_I2C_TIMEOUT) != 0) {
+                return false;
+            }
+        }
+#else
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3733_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+#endif
+    }
+    return true;
+}
+
+void is31fl3733_init_drivers(void) {
+    i2c_init();
+
+    is31fl3733_init(IS31FL3733_I2C_ADDRESS_1, IS31FL3733_SYNC_1);
+#if defined(IS31FL3733_I2C_ADDRESS_2)
+    is31fl3733_init(IS31FL3733_I2C_ADDRESS_2, IS31FL3733_SYNC_2);
+#    if defined(IS31FL3733_I2C_ADDRESS_3)
+    is31fl3733_init(IS31FL3733_I2C_ADDRESS_3, IS31FL3733_SYNC_3);
+#        if defined(IS31FL3733_I2C_ADDRESS_4)
+    is31fl3733_init(IS31FL3733_I2C_ADDRESS_4, IS31FL3733_SYNC_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3733_LED_COUNT; i++) {
+        is31fl3733_set_led_control_register(i, true);
+    }
+
+    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3733_I2C_ADDRESS_2)
+    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3733_I2C_ADDRESS_3)
+    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3733_I2C_ADDRESS_4)
+    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3733_init(uint8_t addr, uint8_t sync) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+    // Sync is passed so set it according to the datasheet.
+
+    is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
+        is31fl3733_write_register(addr, i, 0x00);
+    }
+
+    is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
+
+    // Set PWM on all LEDs to 0
+    // No need to setup Breath registers to PWM as that is the default.
+    for (int i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i++) {
+        is31fl3733_write_register(addr, i, 0x00);
+    }
+
+    is31fl3733_select_page(addr, IS31FL3733_COMMAND_FUNCTION);
+
+    // Set de-ghost pull-up resistors (SWx)
+    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CS_PULLDOWN, IS31FL3733_CS_PULLDOWN);
+    // Set global current to maximum.
+    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3733_GLOBAL_CURRENT);
+    // Disable software shutdown.
+    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((IS31FL3733_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3733_set_value(int index, uint8_t value) {
+    is31fl3733_led_t led;
+    if (index >= 0 && index < IS31FL3733_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3733_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3733_LED_COUNT; i++) {
+        is31fl3733_set_value(i, value);
+    }
+}
+
+void is31fl3733_set_led_control_register(uint8_t index, bool value) {
+    is31fl3733_led_t led;
+    memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));
+
+    uint8_t control_register = led.v / 8;
+    uint8_t bit_value        = led.v % 8;
+
+    if (value) {
+        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required[led.driver] = true;
+}
+
+void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
+
+        // If any of the transactions fail we risk writing dirty page 0,
+        // refresh page 0 just in case.
+        if (!is31fl3733_write_pwm_buffer(addr, g_pwm_buffer[index])) {
+            g_led_control_registers_update_required[index] = true;
+        }
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
+
+        for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
+            is31fl3733_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+        g_led_control_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3733_flush(void) {
+    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3733_I2C_ADDRESS_2)
+    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3733_I2C_ADDRESS_3)
+    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3733_I2C_ADDRESS_4)
+    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3733-mono.h b/drivers/led/issi/is31fl3733-mono.h
new file mode 100644
index 0000000000..dcb33e448f
--- /dev/null
+++ b/drivers/led/issi/is31fl3733-mono.h
@@ -0,0 +1,367 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
+ * Copyright 2021 Leo Deng
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3733_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3733_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_PWM_FREQUENCY
+#    define IS31FL3733_PWM_FREQUENCY ISSI_PWM_FREQUENCY
+#endif
+#ifdef ISSI_SWPULLUP
+#    define IS31FL3733_SW_PULLUP ISSI_SWPULLUP
+#endif
+#ifdef ISSI_CSPULLUP
+#    define IS31FL3733_CS_PULLDOWN ISSI_CSPULLUP
+#endif
+#ifdef ISSI_GLOBALCURRENT
+#    define IS31FL3733_GLOBAL_CURRENT ISSI_GLOBALCURRENT
+#endif
+
+#define is31_led is31fl3733_led_t
+#define g_is31_leds g_is31fl3733_leds
+
+#define PUR_0R IS31FL3733_PUR_0_OHM
+#define PUR_05KR IS31FL3733_PUR_1K_OHM
+#define PUR_3KR IS31FL3733_PUR_2K_OHM
+#define PUR_4KR IS31FL3733_PUR_4K_OHM
+#define PUR_8KR IS31FL3733_PUR_8K_OHM
+#define PUR_16KR IS31FL3733_PUR_16K_OHM
+#define PUR_32KR IS31FL3733_PUR_32K_OHM
+// ========
+
+#define IS31FL3733_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3733_REG_INTERRUPT_STATUS 0xF1
+
+#define IS31FL3733_REG_COMMAND 0xFD
+
+#define IS31FL3733_COMMAND_LED_CONTROL 0x00
+#define IS31FL3733_COMMAND_PWM 0x01
+#define IS31FL3733_COMMAND_AUTO_BREATH 0x02
+#define IS31FL3733_COMMAND_FUNCTION 0x03
+
+#define IS31FL3733_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3733_FUNCTION_REG_SW_PULLUP 0x0F
+#define IS31FL3733_FUNCTION_REG_CS_PULLDOWN 0x10
+#define IS31FL3733_FUNCTION_REG_RESET 0x11
+
+#define IS31FL3733_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3733_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3733_I2C_ADDRESS_GND_GND 0x50
+#define IS31FL3733_I2C_ADDRESS_GND_SCL 0x51
+#define IS31FL3733_I2C_ADDRESS_GND_SDA 0x52
+#define IS31FL3733_I2C_ADDRESS_GND_VCC 0x53
+#define IS31FL3733_I2C_ADDRESS_SCL_GND 0x54
+#define IS31FL3733_I2C_ADDRESS_SCL_SCL 0x55
+#define IS31FL3733_I2C_ADDRESS_SCL_SDA 0x56
+#define IS31FL3733_I2C_ADDRESS_SCL_VCC 0x57
+#define IS31FL3733_I2C_ADDRESS_SDA_GND 0x58
+#define IS31FL3733_I2C_ADDRESS_SDA_SCL 0x59
+#define IS31FL3733_I2C_ADDRESS_SDA_SDA 0x5A
+#define IS31FL3733_I2C_ADDRESS_SDA_VCC 0x5B
+#define IS31FL3733_I2C_ADDRESS_VCC_GND 0x5C
+#define IS31FL3733_I2C_ADDRESS_VCC_SCL 0x5D
+#define IS31FL3733_I2C_ADDRESS_VCC_SDA 0x5E
+#define IS31FL3733_I2C_ADDRESS_VCC_VCC 0x5F
+
+#if defined(LED_MATRIX_IS31FL3733)
+#    define IS31FL3733_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3733_I2C_ADDRESS_4)
+#    define IS31FL3733_DRIVER_COUNT 4
+#elif defined(IS31FL3733_I2C_ADDRESS_3)
+#    define IS31FL3733_DRIVER_COUNT 3
+#elif defined(IS31FL3733_I2C_ADDRESS_2)
+#    define IS31FL3733_DRIVER_COUNT 2
+#elif defined(IS31FL3733_I2C_ADDRESS_1)
+#    define IS31FL3733_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3733_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3733_led_t;
+
+extern const is31fl3733_led_t PROGMEM g_is31fl3733_leds[IS31FL3733_LED_COUNT];
+
+void is31fl3733_init_drivers(void);
+void is31fl3733_init(uint8_t addr, uint8_t sync);
+bool is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3733_select_page(uint8_t addr, uint8_t page);
+bool is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3733_set_value(int index, uint8_t value);
+void is31fl3733_set_value_all(uint8_t value);
+
+void is31fl3733_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index);
+
+void is31fl3733_flush(void);
+
+#define IS31FL3733_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3733_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3733_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3733_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3733_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3733_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3733_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3733_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3733_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3733_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3733_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3733_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3733_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3733_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3733_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3733_PUR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3733_PWM_FREQUENCY_8K4_HZ 0b000
+#define IS31FL3733_PWM_FREQUENCY_4K2_HZ 0b001
+#define IS31FL3733_PWM_FREQUENCY_26K7_HZ 0b010
+#define IS31FL3733_PWM_FREQUENCY_2K1_HZ 0b011
+#define IS31FL3733_PWM_FREQUENCY_1K05_HZ 0b100
+
+#define IS31FL3733_SYNC_NONE 0b00
+#define IS31FL3733_SYNC_MASTER 0b01
+#define IS31FL3733_SYNC_SLAVE 0b10
+
+#define A_1 0x00
+#define A_2 0x01
+#define A_3 0x02
+#define A_4 0x03
+#define A_5 0x04
+#define A_6 0x05
+#define A_7 0x06
+#define A_8 0x07
+#define A_9 0x08
+#define A_10 0x09
+#define A_11 0x0A
+#define A_12 0x0B
+#define A_13 0x0C
+#define A_14 0x0D
+#define A_15 0x0E
+#define A_16 0x0F
+
+#define B_1 0x10
+#define B_2 0x11
+#define B_3 0x12
+#define B_4 0x13
+#define B_5 0x14
+#define B_6 0x15
+#define B_7 0x16
+#define B_8 0x17
+#define B_9 0x18
+#define B_10 0x19
+#define B_11 0x1A
+#define B_12 0x1B
+#define B_13 0x1C
+#define B_14 0x1D
+#define B_15 0x1E
+#define B_16 0x1F
+
+#define C_1 0x20
+#define C_2 0x21
+#define C_3 0x22
+#define C_4 0x23
+#define C_5 0x24
+#define C_6 0x25
+#define C_7 0x26
+#define C_8 0x27
+#define C_9 0x28
+#define C_10 0x29
+#define C_11 0x2A
+#define C_12 0x2B
+#define C_13 0x2C
+#define C_14 0x2D
+#define C_15 0x2E
+#define C_16 0x2F
+
+#define D_1 0x30
+#define D_2 0x31
+#define D_3 0x32
+#define D_4 0x33
+#define D_5 0x34
+#define D_6 0x35
+#define D_7 0x36
+#define D_8 0x37
+#define D_9 0x38
+#define D_10 0x39
+#define D_11 0x3A
+#define D_12 0x3B
+#define D_13 0x3C
+#define D_14 0x3D
+#define D_15 0x3E
+#define D_16 0x3F
+
+#define E_1 0x40
+#define E_2 0x41
+#define E_3 0x42
+#define E_4 0x43
+#define E_5 0x44
+#define E_6 0x45
+#define E_7 0x46
+#define E_8 0x47
+#define E_9 0x48
+#define E_10 0x49
+#define E_11 0x4A
+#define E_12 0x4B
+#define E_13 0x4C
+#define E_14 0x4D
+#define E_15 0x4E
+#define E_16 0x4F
+
+#define F_1 0x50
+#define F_2 0x51
+#define F_3 0x52
+#define F_4 0x53
+#define F_5 0x54
+#define F_6 0x55
+#define F_7 0x56
+#define F_8 0x57
+#define F_9 0x58
+#define F_10 0x59
+#define F_11 0x5A
+#define F_12 0x5B
+#define F_13 0x5C
+#define F_14 0x5D
+#define F_15 0x5E
+#define F_16 0x5F
+
+#define G_1 0x60
+#define G_2 0x61
+#define G_3 0x62
+#define G_4 0x63
+#define G_5 0x64
+#define G_6 0x65
+#define G_7 0x66
+#define G_8 0x67
+#define G_9 0x68
+#define G_10 0x69
+#define G_11 0x6A
+#define G_12 0x6B
+#define G_13 0x6C
+#define G_14 0x6D
+#define G_15 0x6E
+#define G_16 0x6F
+
+#define H_1 0x70
+#define H_2 0x71
+#define H_3 0x72
+#define H_4 0x73
+#define H_5 0x74
+#define H_6 0x75
+#define H_7 0x76
+#define H_8 0x77
+#define H_9 0x78
+#define H_10 0x79
+#define H_11 0x7A
+#define H_12 0x7B
+#define H_13 0x7C
+#define H_14 0x7D
+#define H_15 0x7E
+#define H_16 0x7F
+
+#define I_1 0x80
+#define I_2 0x81
+#define I_3 0x82
+#define I_4 0x83
+#define I_5 0x84
+#define I_6 0x85
+#define I_7 0x86
+#define I_8 0x87
+#define I_9 0x88
+#define I_10 0x89
+#define I_11 0x8A
+#define I_12 0x8B
+#define I_13 0x8C
+#define I_14 0x8D
+#define I_15 0x8E
+#define I_16 0x8F
+
+#define J_1 0x90
+#define J_2 0x91
+#define J_3 0x92
+#define J_4 0x93
+#define J_5 0x94
+#define J_6 0x95
+#define J_7 0x96
+#define J_8 0x97
+#define J_9 0x98
+#define J_10 0x99
+#define J_11 0x9A
+#define J_12 0x9B
+#define J_13 0x9C
+#define J_14 0x9D
+#define J_15 0x9E
+#define J_16 0x9F
+
+#define K_1 0xA0
+#define K_2 0xA1
+#define K_3 0xA2
+#define K_4 0xA3
+#define K_5 0xA4
+#define K_6 0xA5
+#define K_7 0xA6
+#define K_8 0xA7
+#define K_9 0xA8
+#define K_10 0xA9
+#define K_11 0xAA
+#define K_12 0xAB
+#define K_13 0xAC
+#define K_14 0xAD
+#define K_15 0xAE
+#define K_16 0xAF
+
+#define L_1 0xB0
+#define L_2 0xB1
+#define L_3 0xB2
+#define L_4 0xB3
+#define L_5 0xB4
+#define L_6 0xB5
+#define L_7 0xB6
+#define L_8 0xB7
+#define L_9 0xB8
+#define L_10 0xB9
+#define L_11 0xBA
+#define L_12 0xBB
+#define L_13 0xBC
+#define L_14 0xBD
+#define L_15 0xBE
+#define L_16 0xBF
diff --git a/drivers/led/issi/is31fl3733-simple.c b/drivers/led/issi/is31fl3733-simple.c
deleted file mode 100644
index 889d9ef389..0000000000
--- a/drivers/led/issi/is31fl3733-simple.c
+++ /dev/null
@@ -1,270 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2021 Doni Crosby
- * Copyright 2021 Leo Deng
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "is31fl3733-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3733_PWM_REGISTER_COUNT 192
-#define IS31FL3733_LED_CONTROL_REGISTER_COUNT 24
-
-#ifndef IS31FL3733_I2C_TIMEOUT
-#    define IS31FL3733_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3733_I2C_PERSISTENCE
-#    define IS31FL3733_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3733_PWM_FREQUENCY
-#    define IS31FL3733_PWM_FREQUENCY IS31FL3733_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3733B only
-#endif
-
-#ifndef IS31FL3733_SW_PULLUP
-#    define IS31FL3733_SW_PULLUP IS31FL3733_PUR_0_OHM
-#endif
-
-#ifndef IS31FL3733_CS_PULLDOWN
-#    define IS31FL3733_CS_PULLDOWN IS31FL3733_PDR_0_OHM
-#endif
-
-#ifndef IS31FL3733_GLOBAL_CURRENT
-#    define IS31FL3733_GLOBAL_CURRENT 0xFF
-#endif
-
-#ifndef IS31FL3733_SYNC_1
-#    define IS31FL3733_SYNC_1 IS31FL3733_SYNC_NONE
-#endif
-#ifndef IS31FL3733_SYNC_2
-#    define IS31FL3733_SYNC_2 IS31FL3733_SYNC_NONE
-#endif
-#ifndef IS31FL3733_SYNC_3
-#    define IS31FL3733_SYNC_3 IS31FL3733_SYNC_NONE
-#endif
-#ifndef IS31FL3733_SYNC_4
-#    define IS31FL3733_SYNC_4 IS31FL3733_SYNC_NONE
-#endif
-
-uint8_t i2c_transfer_buffer[20];
-
-// These buffers match the IS31FL3733 PWM registers.
-// The control buffers match the page 0 LED On/Off registers.
-// Storing them like this is optimal for I2C transfers to the registers.
-// We could optimize this and take out the unused registers from these
-// buffers and the transfers in is31fl3733_write_pwm_buffer() but it's
-// probably not worth the extra complexity.
-uint8_t g_pwm_buffer[IS31FL3733_DRIVER_COUNT][IS31FL3733_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3733_DRIVER_COUNT] = {false};
-
-uint8_t g_led_control_registers[IS31FL3733_DRIVER_COUNT][IS31FL3733_LED_CONTROL_REGISTER_COUNT] = {0};
-bool    g_led_control_registers_update_required[IS31FL3733_DRIVER_COUNT]                        = {false};
-
-bool is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    // If the transaction fails function returns false.
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3733_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3733_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3733_I2C_TIMEOUT) != 0) {
-            return false;
-        }
-    }
-#else
-    if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3733_I2C_TIMEOUT) != 0) {
-        return false;
-    }
-#endif
-    return true;
-}
-
-void is31fl3733_select_page(uint8_t addr, uint8_t page) {
-    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND_WRITE_LOCK, IS31FL3733_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3733_write_register(addr, IS31FL3733_REG_COMMAND, page);
-}
-
-bool is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assumes page 1 is already selected.
-    // If any of the transactions fails function returns false.
-    // Transmit PWM registers in 12 transfers of 16 bytes.
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // Iterate over the pwm_buffer contents at 16 byte intervals.
-    for (int i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i;
-        // Copy the data from i to i+15.
-        // Device will auto-increment register for data after the first byte
-        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3733_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3733_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3733_I2C_TIMEOUT) != 0) {
-                return false;
-            }
-        }
-#else
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3733_I2C_TIMEOUT) != 0) {
-            return false;
-        }
-#endif
-    }
-    return true;
-}
-
-void is31fl3733_init_drivers(void) {
-    i2c_init();
-
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_1, IS31FL3733_SYNC_1);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_2, IS31FL3733_SYNC_2);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_3, IS31FL3733_SYNC_3);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_init(IS31FL3733_I2C_ADDRESS_4, IS31FL3733_SYNC_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3733_LED_COUNT; i++) {
-        is31fl3733_set_led_control_register(i, true);
-    }
-
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_update_led_control_registers(IS31FL3733_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3733_init(uint8_t addr, uint8_t sync) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-    // Sync is passed so set it according to the datasheet.
-
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3733_write_register(addr, i, 0x00);
-    }
-
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
-
-    // Set PWM on all LEDs to 0
-    // No need to setup Breath registers to PWM as that is the default.
-    for (int i = 0; i < IS31FL3733_PWM_REGISTER_COUNT; i++) {
-        is31fl3733_write_register(addr, i, 0x00);
-    }
-
-    is31fl3733_select_page(addr, IS31FL3733_COMMAND_FUNCTION);
-
-    // Set de-ghost pull-up resistors (SWx)
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_SW_PULLUP, IS31FL3733_SW_PULLUP);
-    // Set de-ghost pull-down resistors (CSx)
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CS_PULLDOWN, IS31FL3733_CS_PULLDOWN);
-    // Set global current to maximum.
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3733_GLOBAL_CURRENT);
-    // Disable software shutdown.
-    is31fl3733_write_register(addr, IS31FL3733_FUNCTION_REG_CONFIGURATION, ((sync & 0b11) << 6) | ((IS31FL3733_PWM_FREQUENCY & 0b111) << 3) | 0x01);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3733_set_value(int index, uint8_t value) {
-    is31fl3733_led_t led;
-    if (index >= 0 && index < IS31FL3733_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer[led.driver][led.v]          = value;
-        g_pwm_buffer_update_required[led.driver] = true;
-    }
-}
-
-void is31fl3733_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3733_LED_COUNT; i++) {
-        is31fl3733_set_value(i, value);
-    }
-}
-
-void is31fl3733_set_led_control_register(uint8_t index, bool value) {
-    is31fl3733_led_t led;
-    memcpy_P(&led, (&g_is31fl3733_leds[index]), sizeof(led));
-
-    uint8_t control_register = led.v / 8;
-    uint8_t bit_value        = led.v % 8;
-
-    if (value) {
-        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
-    } else {
-        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
-    }
-
-    g_led_control_registers_update_required[led.driver] = true;
-}
-
-void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3733_select_page(addr, IS31FL3733_COMMAND_PWM);
-
-        // If any of the transactions fail we risk writing dirty page 0,
-        // refresh page 0 just in case.
-        if (!is31fl3733_write_pwm_buffer(addr, g_pwm_buffer[index])) {
-            g_led_control_registers_update_required[index] = true;
-        }
-        g_pwm_buffer_update_required[index] = false;
-    }
-}
-
-void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_led_control_registers_update_required[index]) {
-        is31fl3733_select_page(addr, IS31FL3733_COMMAND_LED_CONTROL);
-
-        for (int i = 0; i < IS31FL3733_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3733_write_register(addr, i, g_led_control_registers[index][i]);
-        }
-        g_led_control_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3733_flush(void) {
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3733_I2C_ADDRESS_2)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3733_I2C_ADDRESS_3)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3733_I2C_ADDRESS_4)
-    is31fl3733_update_pwm_buffers(IS31FL3733_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3733-simple.h b/drivers/led/issi/is31fl3733-simple.h
deleted file mode 100644
index dcb33e448f..0000000000
--- a/drivers/led/issi/is31fl3733-simple.h
+++ /dev/null
@@ -1,367 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2021 Doni Crosby
- * Copyright 2021 Leo Deng
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-// ======== DEPRECATED DEFINES - DO NOT USE ========
-#ifdef ISSI_TIMEOUT
-#    define IS31FL3733_I2C_TIMEOUT ISSI_TIMEOUT
-#endif
-#ifdef ISSI_PERSISTENCE
-#    define IS31FL3733_I2C_PERSISTENCE ISSI_PERSISTENCE
-#endif
-#ifdef ISSI_PWM_FREQUENCY
-#    define IS31FL3733_PWM_FREQUENCY ISSI_PWM_FREQUENCY
-#endif
-#ifdef ISSI_SWPULLUP
-#    define IS31FL3733_SW_PULLUP ISSI_SWPULLUP
-#endif
-#ifdef ISSI_CSPULLUP
-#    define IS31FL3733_CS_PULLDOWN ISSI_CSPULLUP
-#endif
-#ifdef ISSI_GLOBALCURRENT
-#    define IS31FL3733_GLOBAL_CURRENT ISSI_GLOBALCURRENT
-#endif
-
-#define is31_led is31fl3733_led_t
-#define g_is31_leds g_is31fl3733_leds
-
-#define PUR_0R IS31FL3733_PUR_0_OHM
-#define PUR_05KR IS31FL3733_PUR_1K_OHM
-#define PUR_3KR IS31FL3733_PUR_2K_OHM
-#define PUR_4KR IS31FL3733_PUR_4K_OHM
-#define PUR_8KR IS31FL3733_PUR_8K_OHM
-#define PUR_16KR IS31FL3733_PUR_16K_OHM
-#define PUR_32KR IS31FL3733_PUR_32K_OHM
-// ========
-
-#define IS31FL3733_REG_INTERRUPT_MASK 0xF0
-#define IS31FL3733_REG_INTERRUPT_STATUS 0xF1
-
-#define IS31FL3733_REG_COMMAND 0xFD
-
-#define IS31FL3733_COMMAND_LED_CONTROL 0x00
-#define IS31FL3733_COMMAND_PWM 0x01
-#define IS31FL3733_COMMAND_AUTO_BREATH 0x02
-#define IS31FL3733_COMMAND_FUNCTION 0x03
-
-#define IS31FL3733_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3733_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3733_FUNCTION_REG_SW_PULLUP 0x0F
-#define IS31FL3733_FUNCTION_REG_CS_PULLDOWN 0x10
-#define IS31FL3733_FUNCTION_REG_RESET 0x11
-
-#define IS31FL3733_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3733_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3733_I2C_ADDRESS_GND_GND 0x50
-#define IS31FL3733_I2C_ADDRESS_GND_SCL 0x51
-#define IS31FL3733_I2C_ADDRESS_GND_SDA 0x52
-#define IS31FL3733_I2C_ADDRESS_GND_VCC 0x53
-#define IS31FL3733_I2C_ADDRESS_SCL_GND 0x54
-#define IS31FL3733_I2C_ADDRESS_SCL_SCL 0x55
-#define IS31FL3733_I2C_ADDRESS_SCL_SDA 0x56
-#define IS31FL3733_I2C_ADDRESS_SCL_VCC 0x57
-#define IS31FL3733_I2C_ADDRESS_SDA_GND 0x58
-#define IS31FL3733_I2C_ADDRESS_SDA_SCL 0x59
-#define IS31FL3733_I2C_ADDRESS_SDA_SDA 0x5A
-#define IS31FL3733_I2C_ADDRESS_SDA_VCC 0x5B
-#define IS31FL3733_I2C_ADDRESS_VCC_GND 0x5C
-#define IS31FL3733_I2C_ADDRESS_VCC_SCL 0x5D
-#define IS31FL3733_I2C_ADDRESS_VCC_SDA 0x5E
-#define IS31FL3733_I2C_ADDRESS_VCC_VCC 0x5F
-
-#if defined(LED_MATRIX_IS31FL3733)
-#    define IS31FL3733_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3733_I2C_ADDRESS_4)
-#    define IS31FL3733_DRIVER_COUNT 4
-#elif defined(IS31FL3733_I2C_ADDRESS_3)
-#    define IS31FL3733_DRIVER_COUNT 3
-#elif defined(IS31FL3733_I2C_ADDRESS_2)
-#    define IS31FL3733_DRIVER_COUNT 2
-#elif defined(IS31FL3733_I2C_ADDRESS_1)
-#    define IS31FL3733_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3733_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3733_led_t;
-
-extern const is31fl3733_led_t PROGMEM g_is31fl3733_leds[IS31FL3733_LED_COUNT];
-
-void is31fl3733_init_drivers(void);
-void is31fl3733_init(uint8_t addr, uint8_t sync);
-bool is31fl3733_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3733_select_page(uint8_t addr, uint8_t page);
-bool is31fl3733_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3733_set_value(int index, uint8_t value);
-void is31fl3733_set_value_all(uint8_t value);
-
-void is31fl3733_set_led_control_register(uint8_t index, bool value);
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3733_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3733_update_led_control_registers(uint8_t addr, uint8_t index);
-
-void is31fl3733_flush(void);
-
-#define IS31FL3733_PDR_0_OHM 0b000   // No pull-down resistor
-#define IS31FL3733_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3733_PDR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3733_PDR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3733_PDR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3733_PDR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3733_PDR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3733_PDR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3733_PUR_0_OHM 0b000   // No pull-up resistor
-#define IS31FL3733_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3733_PUR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3733_PUR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3733_PUR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3733_PUR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3733_PUR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3733_PUR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3733_PWM_FREQUENCY_8K4_HZ 0b000
-#define IS31FL3733_PWM_FREQUENCY_4K2_HZ 0b001
-#define IS31FL3733_PWM_FREQUENCY_26K7_HZ 0b010
-#define IS31FL3733_PWM_FREQUENCY_2K1_HZ 0b011
-#define IS31FL3733_PWM_FREQUENCY_1K05_HZ 0b100
-
-#define IS31FL3733_SYNC_NONE 0b00
-#define IS31FL3733_SYNC_MASTER 0b01
-#define IS31FL3733_SYNC_SLAVE 0b10
-
-#define A_1 0x00
-#define A_2 0x01
-#define A_3 0x02
-#define A_4 0x03
-#define A_5 0x04
-#define A_6 0x05
-#define A_7 0x06
-#define A_8 0x07
-#define A_9 0x08
-#define A_10 0x09
-#define A_11 0x0A
-#define A_12 0x0B
-#define A_13 0x0C
-#define A_14 0x0D
-#define A_15 0x0E
-#define A_16 0x0F
-
-#define B_1 0x10
-#define B_2 0x11
-#define B_3 0x12
-#define B_4 0x13
-#define B_5 0x14
-#define B_6 0x15
-#define B_7 0x16
-#define B_8 0x17
-#define B_9 0x18
-#define B_10 0x19
-#define B_11 0x1A
-#define B_12 0x1B
-#define B_13 0x1C
-#define B_14 0x1D
-#define B_15 0x1E
-#define B_16 0x1F
-
-#define C_1 0x20
-#define C_2 0x21
-#define C_3 0x22
-#define C_4 0x23
-#define C_5 0x24
-#define C_6 0x25
-#define C_7 0x26
-#define C_8 0x27
-#define C_9 0x28
-#define C_10 0x29
-#define C_11 0x2A
-#define C_12 0x2B
-#define C_13 0x2C
-#define C_14 0x2D
-#define C_15 0x2E
-#define C_16 0x2F
-
-#define D_1 0x30
-#define D_2 0x31
-#define D_3 0x32
-#define D_4 0x33
-#define D_5 0x34
-#define D_6 0x35
-#define D_7 0x36
-#define D_8 0x37
-#define D_9 0x38
-#define D_10 0x39
-#define D_11 0x3A
-#define D_12 0x3B
-#define D_13 0x3C
-#define D_14 0x3D
-#define D_15 0x3E
-#define D_16 0x3F
-
-#define E_1 0x40
-#define E_2 0x41
-#define E_3 0x42
-#define E_4 0x43
-#define E_5 0x44
-#define E_6 0x45
-#define E_7 0x46
-#define E_8 0x47
-#define E_9 0x48
-#define E_10 0x49
-#define E_11 0x4A
-#define E_12 0x4B
-#define E_13 0x4C
-#define E_14 0x4D
-#define E_15 0x4E
-#define E_16 0x4F
-
-#define F_1 0x50
-#define F_2 0x51
-#define F_3 0x52
-#define F_4 0x53
-#define F_5 0x54
-#define F_6 0x55
-#define F_7 0x56
-#define F_8 0x57
-#define F_9 0x58
-#define F_10 0x59
-#define F_11 0x5A
-#define F_12 0x5B
-#define F_13 0x5C
-#define F_14 0x5D
-#define F_15 0x5E
-#define F_16 0x5F
-
-#define G_1 0x60
-#define G_2 0x61
-#define G_3 0x62
-#define G_4 0x63
-#define G_5 0x64
-#define G_6 0x65
-#define G_7 0x66
-#define G_8 0x67
-#define G_9 0x68
-#define G_10 0x69
-#define G_11 0x6A
-#define G_12 0x6B
-#define G_13 0x6C
-#define G_14 0x6D
-#define G_15 0x6E
-#define G_16 0x6F
-
-#define H_1 0x70
-#define H_2 0x71
-#define H_3 0x72
-#define H_4 0x73
-#define H_5 0x74
-#define H_6 0x75
-#define H_7 0x76
-#define H_8 0x77
-#define H_9 0x78
-#define H_10 0x79
-#define H_11 0x7A
-#define H_12 0x7B
-#define H_13 0x7C
-#define H_14 0x7D
-#define H_15 0x7E
-#define H_16 0x7F
-
-#define I_1 0x80
-#define I_2 0x81
-#define I_3 0x82
-#define I_4 0x83
-#define I_5 0x84
-#define I_6 0x85
-#define I_7 0x86
-#define I_8 0x87
-#define I_9 0x88
-#define I_10 0x89
-#define I_11 0x8A
-#define I_12 0x8B
-#define I_13 0x8C
-#define I_14 0x8D
-#define I_15 0x8E
-#define I_16 0x8F
-
-#define J_1 0x90
-#define J_2 0x91
-#define J_3 0x92
-#define J_4 0x93
-#define J_5 0x94
-#define J_6 0x95
-#define J_7 0x96
-#define J_8 0x97
-#define J_9 0x98
-#define J_10 0x99
-#define J_11 0x9A
-#define J_12 0x9B
-#define J_13 0x9C
-#define J_14 0x9D
-#define J_15 0x9E
-#define J_16 0x9F
-
-#define K_1 0xA0
-#define K_2 0xA1
-#define K_3 0xA2
-#define K_4 0xA3
-#define K_5 0xA4
-#define K_6 0xA5
-#define K_7 0xA6
-#define K_8 0xA7
-#define K_9 0xA8
-#define K_10 0xA9
-#define K_11 0xAA
-#define K_12 0xAB
-#define K_13 0xAC
-#define K_14 0xAD
-#define K_15 0xAE
-#define K_16 0xAF
-
-#define L_1 0xB0
-#define L_2 0xB1
-#define L_3 0xB2
-#define L_4 0xB3
-#define L_5 0xB4
-#define L_6 0xB5
-#define L_7 0xB6
-#define L_8 0xB7
-#define L_9 0xB8
-#define L_10 0xB9
-#define L_11 0xBA
-#define L_12 0xBB
-#define L_13 0xBC
-#define L_14 0xBD
-#define L_15 0xBE
-#define L_16 0xBF
diff --git a/drivers/led/issi/is31fl3736-mono.c b/drivers/led/issi/is31fl3736-mono.c
new file mode 100644
index 0000000000..5ced65aa06
--- /dev/null
+++ b/drivers/led/issi/is31fl3736-mono.c
@@ -0,0 +1,244 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ * Copyright 2021 Doni Crosby
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "is31fl3736-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3736_PWM_REGISTER_COUNT 192 // actually 96
+#define IS31FL3736_LED_CONTROL_REGISTER_COUNT 24
+
+#ifndef IS31FL3736_I2C_TIMEOUT
+#    define IS31FL3736_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3736_I2C_PERSISTENCE
+#    define IS31FL3736_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3736_PWM_FREQUENCY
+#    define IS31FL3736_PWM_FREQUENCY IS31FL3736_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3736B only
+#endif
+
+#ifndef IS31FL3736_SW_PULLUP
+#    define IS31FL3736_SW_PULLUP IS31FL3736_PUR_0_OHM
+#endif
+
+#ifndef IS31FL3736_CS_PULLDOWN
+#    define IS31FL3736_CS_PULLDOWN IS31FL3736_PDR_0_OHM
+#endif
+
+#ifndef IS31FL3736_GLOBAL_CURRENT
+#    define IS31FL3736_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20];
+
+// These buffers match the IS31FL3736 PWM registers.
+// The control buffers match the page 0 LED On/Off registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
+bool    g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT]                        = {false};
+
+void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3736_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3736_select_page(uint8_t addr, uint8_t page) {
+    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, page);
+}
+
+void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // assumes page 1 is already selected
+
+    // transmit PWM registers in 12 transfers of 16 bytes
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // iterate over the pwm_buffer contents at 16 byte intervals
+    for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3736_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT) == 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3736_init_drivers(void) {
+    i2c_init();
+
+    is31fl3736_init(IS31FL3736_I2C_ADDRESS_1);
+#if defined(IS31FL3736_I2C_ADDRESS_2)
+    is31fl3736_init(IS31FL3736_I2C_ADDRESS_2);
+#    if defined(IS31FL3736_I2C_ADDRESS_3)
+    is31fl3736_init(IS31FL3736_I2C_ADDRESS_3);
+#        if defined(IS31FL3736_I2C_ADDRESS_4)
+    is31fl3736_init(IS31FL3736_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
+        is31fl3736_set_led_control_register(i, true);
+    }
+
+    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3736_I2C_ADDRESS_2)
+    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3736_I2C_ADDRESS_3)
+    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3736_I2C_ADDRESS_4)
+    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3736_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
+        is31fl3736_write_register(addr, i, 0x00);
+    }
+
+    is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
+
+    // Set PWM on all LEDs to 0
+    // No need to setup Breath registers to PWM as that is the default.
+    for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) {
+        is31fl3736_write_register(addr, i, 0x00);
+    }
+
+    is31fl3736_select_page(addr, IS31FL3736_COMMAND_FUNCTION);
+
+    // Set de-ghost pull-up resistors (SWx)
+    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
+    // Set global current to maximum.
+    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
+    // Disable software shutdown.
+    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3736_set_value(int index, uint8_t value) {
+    is31fl3736_led_t led;
+    if (index >= 0 && index < IS31FL3736_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3736_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
+        is31fl3736_set_value(i, value);
+    }
+}
+
+void is31fl3736_set_led_control_register(uint8_t index, bool value) {
+    is31fl3736_led_t led;
+    memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
+
+    // The PWM register for a matrix position (0x00 to 0xBF) is interleaved, so:
+    // A1=0x00 A2=0x02 A3=0x04 A4=0x06 A5=0x08 A6=0x0A A7=0x0C A8=0x0E
+    // B1=0x10 B2=0x12 B3=0x14
+    // But also, the LED control registers (0x00 to 0x17) are also interleaved, so:
+    // A1-A4=0x00 A5-A8=0x01
+
+    uint8_t control_register = led.v / 8;
+    uint8_t bit_value        = led.v % 8;
+
+    if (value) {
+        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required[led.driver] = true;
+}
+
+void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
+
+        is31fl3736_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
+
+        for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
+            is31fl3736_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+        g_led_control_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3736_flush(void) {
+    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3736_I2C_ADDRESS_2)
+    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3736_I2C_ADDRESS_3)
+    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3736_I2C_ADDRESS_4)
+    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3736-mono.h b/drivers/led/issi/is31fl3736-mono.h
new file mode 100644
index 0000000000..5e80eb646a
--- /dev/null
+++ b/drivers/led/issi/is31fl3736-mono.h
@@ -0,0 +1,262 @@
+/* Copyright 2018 Jason Williams (Wilba)
+ * Copyright 2021 Doni Crosby
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3736_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3736_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_SWPULLUP
+#    define IS31FL3736_SW_PULLUP ISSI_SWPULLUP
+#endif
+#ifdef ISSI_CSPULLUP
+#    define IS31FL3736_CS_PULLDOWN ISSI_CSPULLUP
+#endif
+#ifdef ISSI_GLOBALCURRENT
+#    define IS31FL3736_GLOBAL_CURRENT ISSI_GLOBALCURRENT
+#endif
+
+#define is31_led is31fl3736_led_t
+#define g_is31_leds g_is31fl3736_leds
+
+#define PUR_0R IS31FL3736_PUR_0_OHM
+#define PUR_05KR IS31FL3736_PUR_05K_OHM
+#define PUR_1KR IS31FL3736_PUR_1K_OHM
+#define PUR_2KR IS31FL3736_PUR_2K_OHM
+#define PUR_4KR IS31FL3736_PUR_4K_OHM
+#define PUR_8KR IS31FL3736_PUR_8K_OHM
+#define PUR_16KR IS31FL3736_PUR_16K_OHM
+#define PUR_32KR IS31FL3736_PUR_32K_OHM
+// ========
+
+#define IS31FL3736_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3736_REG_INTERRUPT_STATUS 0xF1
+
+#define IS31FL3736_REG_COMMAND 0xFD
+
+#define IS31FL3736_COMMAND_LED_CONTROL 0x00
+#define IS31FL3736_COMMAND_PWM 0x01
+#define IS31FL3736_COMMAND_AUTO_BREATH 0x02
+#define IS31FL3736_COMMAND_FUNCTION 0x03
+
+#define IS31FL3736_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3736_FUNCTION_REG_SW_PULLUP 0x0F
+#define IS31FL3736_FUNCTION_REG_CS_PULLDOWN 0x10
+#define IS31FL3736_FUNCTION_REG_RESET 0x11
+
+#define IS31FL3736_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3736_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3736_I2C_ADDRESS_GND_GND 0x50
+#define IS31FL3736_I2C_ADDRESS_GND_SCL 0x51
+#define IS31FL3736_I2C_ADDRESS_GND_SDA 0x52
+#define IS31FL3736_I2C_ADDRESS_GND_VCC 0x53
+#define IS31FL3736_I2C_ADDRESS_SCL_GND 0x54
+#define IS31FL3736_I2C_ADDRESS_SCL_SCL 0x55
+#define IS31FL3736_I2C_ADDRESS_SCL_SDA 0x56
+#define IS31FL3736_I2C_ADDRESS_SCL_VCC 0x57
+#define IS31FL3736_I2C_ADDRESS_SDA_GND 0x58
+#define IS31FL3736_I2C_ADDRESS_SDA_SCL 0x59
+#define IS31FL3736_I2C_ADDRESS_SDA_SDA 0x5A
+#define IS31FL3736_I2C_ADDRESS_SDA_VCC 0x5B
+#define IS31FL3736_I2C_ADDRESS_VCC_GND 0x5C
+#define IS31FL3736_I2C_ADDRESS_VCC_SCL 0x5D
+#define IS31FL3736_I2C_ADDRESS_VCC_SDA 0x5E
+#define IS31FL3736_I2C_ADDRESS_VCC_VCC 0x5F
+
+#if defined(LED_MATRIX_IS31FL3736)
+#    define IS31FL3736_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3736_I2C_ADDRESS_4)
+#    define IS31FL3736_DRIVER_COUNT 4
+#elif defined(IS31FL3736_I2C_ADDRESS_3)
+#    define IS31FL3736_DRIVER_COUNT 3
+#elif defined(IS31FL3736_I2C_ADDRESS_2)
+#    define IS31FL3736_DRIVER_COUNT 2
+#elif defined(IS31FL3736_I2C_ADDRESS_1)
+#    define IS31FL3736_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3736_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3736_led_t;
+
+extern const is31fl3736_led_t PROGMEM g_is31fl3736_leds[IS31FL3736_LED_COUNT];
+
+void is31fl3736_init_drivers(void);
+void is31fl3736_init(uint8_t addr);
+void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3736_select_page(uint8_t addr, uint8_t page);
+void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3736_set_value(int index, uint8_t value);
+void is31fl3736_set_value_all(uint8_t value);
+
+void is31fl3736_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index);
+
+void is31fl3736_flush(void);
+
+#define IS31FL3736_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3736_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3736_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3736_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3736_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3736_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3736_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3736_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3736_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3736_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3736_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3736_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3736_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3736_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3736_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3736_PUR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3736_PWM_FREQUENCY_8K4_HZ 0b000
+#define IS31FL3736_PWM_FREQUENCY_4K2_HZ 0b001
+#define IS31FL3736_PWM_FREQUENCY_26K7_HZ 0b010
+#define IS31FL3736_PWM_FREQUENCY_2K1_HZ 0b011
+#define IS31FL3736_PWM_FREQUENCY_1K05_HZ 0b100
+
+#define A_1 0x00
+#define A_2 0x02
+#define A_3 0x04
+#define A_4 0x06
+#define A_5 0x08
+#define A_6 0x0A
+#define A_7 0x0C
+#define A_8 0x0E
+
+#define B_1 0x10
+#define B_2 0x12
+#define B_3 0x14
+#define B_4 0x16
+#define B_5 0x18
+#define B_6 0x1A
+#define B_7 0x1C
+#define B_8 0x1E
+
+#define C_1 0x20
+#define C_2 0x22
+#define C_3 0x24
+#define C_4 0x26
+#define C_5 0x28
+#define C_6 0x2A
+#define C_7 0x2C
+#define C_8 0x2E
+
+#define D_1 0x30
+#define D_2 0x32
+#define D_3 0x34
+#define D_4 0x36
+#define D_5 0x38
+#define D_6 0x3A
+#define D_7 0x3C
+#define D_8 0x3E
+
+#define E_1 0x40
+#define E_2 0x42
+#define E_3 0x44
+#define E_4 0x46
+#define E_5 0x48
+#define E_6 0x4A
+#define E_7 0x4C
+#define E_8 0x4E
+
+#define F_1 0x50
+#define F_2 0x52
+#define F_3 0x54
+#define F_4 0x56
+#define F_5 0x58
+#define F_6 0x5A
+#define F_7 0x5C
+#define F_8 0x5E
+
+#define G_1 0x60
+#define G_2 0x62
+#define G_3 0x64
+#define G_4 0x66
+#define G_5 0x68
+#define G_6 0x6A
+#define G_7 0x6C
+#define G_8 0x6E
+
+#define H_1 0x70
+#define H_2 0x72
+#define H_3 0x74
+#define H_4 0x76
+#define H_5 0x78
+#define H_6 0x7A
+#define H_7 0x7C
+#define H_8 0x7E
+
+#define I_1 0x80
+#define I_2 0x82
+#define I_3 0x84
+#define I_4 0x86
+#define I_5 0x88
+#define I_6 0x8A
+#define I_7 0x8C
+#define I_8 0x8E
+
+#define J_1 0x90
+#define J_2 0x92
+#define J_3 0x94
+#define J_4 0x96
+#define J_5 0x98
+#define J_6 0x9A
+#define J_7 0x9C
+#define J_8 0x9E
+
+#define K_1 0xA0
+#define K_2 0xA2
+#define K_3 0xA4
+#define K_4 0xA6
+#define K_5 0xA8
+#define K_6 0xAA
+#define K_7 0xAC
+#define K_8 0xAE
+
+#define L_1 0xB0
+#define L_2 0xB2
+#define L_3 0xB4
+#define L_4 0xB6
+#define L_5 0xB8
+#define L_6 0xBA
+#define L_7 0xBC
+#define L_8 0xBE
diff --git a/drivers/led/issi/is31fl3736-simple.c b/drivers/led/issi/is31fl3736-simple.c
deleted file mode 100644
index ac5e0fb453..0000000000
--- a/drivers/led/issi/is31fl3736-simple.c
+++ /dev/null
@@ -1,244 +0,0 @@
-/* Copyright 2018 Jason Williams (Wilba)
- * Copyright 2021 Doni Crosby
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "is31fl3736-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3736_PWM_REGISTER_COUNT 192 // actually 96
-#define IS31FL3736_LED_CONTROL_REGISTER_COUNT 24
-
-#ifndef IS31FL3736_I2C_TIMEOUT
-#    define IS31FL3736_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3736_I2C_PERSISTENCE
-#    define IS31FL3736_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3736_PWM_FREQUENCY
-#    define IS31FL3736_PWM_FREQUENCY IS31FL3736_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3736B only
-#endif
-
-#ifndef IS31FL3736_SW_PULLUP
-#    define IS31FL3736_SW_PULLUP IS31FL3736_PUR_0_OHM
-#endif
-
-#ifndef IS31FL3736_CS_PULLDOWN
-#    define IS31FL3736_CS_PULLDOWN IS31FL3736_PDR_0_OHM
-#endif
-
-#ifndef IS31FL3736_GLOBAL_CURRENT
-#    define IS31FL3736_GLOBAL_CURRENT 0xFF
-#endif
-
-uint8_t i2c_transfer_buffer[20];
-
-// These buffers match the IS31FL3736 PWM registers.
-// The control buffers match the page 0 LED On/Off registers.
-// Storing them like this is optimal for I2C transfers to the registers.
-// We could optimize this and take out the unused registers from these
-// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's
-// probably not worth the extra complexity.
-uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][IS31FL3736_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false};
-
-uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][IS31FL3736_LED_CONTROL_REGISTER_COUNT] = {0};
-bool    g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT]                        = {false};
-
-void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3736_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3736_select_page(uint8_t addr, uint8_t page) {
-    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND_WRITE_LOCK, IS31FL3736_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3736_write_register(addr, IS31FL3736_REG_COMMAND, page);
-}
-
-void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // assumes page 1 is already selected
-
-    // transmit PWM registers in 12 transfers of 16 bytes
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // iterate over the pwm_buffer contents at 16 byte intervals
-    for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i;
-        // copy the data from i to i+15
-        // device will auto-increment register for data after the first byte
-        // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3736_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT) == 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3736_init_drivers(void) {
-    i2c_init();
-
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_1);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_2);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_3);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_init(IS31FL3736_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
-        is31fl3736_set_led_control_register(i, true);
-    }
-
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_update_led_control_registers(IS31FL3736_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3736_init(uint8_t addr) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3736_write_register(addr, i, 0x00);
-    }
-
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
-
-    // Set PWM on all LEDs to 0
-    // No need to setup Breath registers to PWM as that is the default.
-    for (int i = 0; i < IS31FL3736_PWM_REGISTER_COUNT; i++) {
-        is31fl3736_write_register(addr, i, 0x00);
-    }
-
-    is31fl3736_select_page(addr, IS31FL3736_COMMAND_FUNCTION);
-
-    // Set de-ghost pull-up resistors (SWx)
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_SW_PULLUP, IS31FL3736_SW_PULLUP);
-    // Set de-ghost pull-down resistors (CSx)
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CS_PULLDOWN, IS31FL3736_CS_PULLDOWN);
-    // Set global current to maximum.
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3736_GLOBAL_CURRENT);
-    // Disable software shutdown.
-    is31fl3736_write_register(addr, IS31FL3736_FUNCTION_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3736_set_value(int index, uint8_t value) {
-    is31fl3736_led_t led;
-    if (index >= 0 && index < IS31FL3736_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer[led.driver][led.v]          = value;
-        g_pwm_buffer_update_required[led.driver] = true;
-    }
-}
-
-void is31fl3736_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3736_LED_COUNT; i++) {
-        is31fl3736_set_value(i, value);
-    }
-}
-
-void is31fl3736_set_led_control_register(uint8_t index, bool value) {
-    is31fl3736_led_t led;
-    memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led));
-
-    // The PWM register for a matrix position (0x00 to 0xBF) is interleaved, so:
-    // A1=0x00 A2=0x02 A3=0x04 A4=0x06 A5=0x08 A6=0x0A A7=0x0C A8=0x0E
-    // B1=0x10 B2=0x12 B3=0x14
-    // But also, the LED control registers (0x00 to 0x17) are also interleaved, so:
-    // A1-A4=0x00 A5-A8=0x01
-
-    uint8_t control_register = led.v / 8;
-    uint8_t bit_value        = led.v % 8;
-
-    if (value) {
-        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
-    } else {
-        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
-    }
-
-    g_led_control_registers_update_required[led.driver] = true;
-}
-
-void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3736_select_page(addr, IS31FL3736_COMMAND_PWM);
-
-        is31fl3736_write_pwm_buffer(addr, g_pwm_buffer[index]);
-        g_pwm_buffer_update_required[index] = false;
-    }
-}
-
-void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_led_control_registers_update_required[index]) {
-        is31fl3736_select_page(addr, IS31FL3736_COMMAND_LED_CONTROL);
-
-        for (int i = 0; i < IS31FL3736_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3736_write_register(addr, i, g_led_control_registers[index][i]);
-        }
-        g_led_control_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3736_flush(void) {
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3736_I2C_ADDRESS_2)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3736_I2C_ADDRESS_3)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3736_I2C_ADDRESS_4)
-    is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3736-simple.h b/drivers/led/issi/is31fl3736-simple.h
deleted file mode 100644
index 5e80eb646a..0000000000
--- a/drivers/led/issi/is31fl3736-simple.h
+++ /dev/null
@@ -1,262 +0,0 @@
-/* Copyright 2018 Jason Williams (Wilba)
- * Copyright 2021 Doni Crosby
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-// ======== DEPRECATED DEFINES - DO NOT USE ========
-#ifdef ISSI_TIMEOUT
-#    define IS31FL3736_I2C_TIMEOUT ISSI_TIMEOUT
-#endif
-#ifdef ISSI_PERSISTENCE
-#    define IS31FL3736_I2C_PERSISTENCE ISSI_PERSISTENCE
-#endif
-#ifdef ISSI_SWPULLUP
-#    define IS31FL3736_SW_PULLUP ISSI_SWPULLUP
-#endif
-#ifdef ISSI_CSPULLUP
-#    define IS31FL3736_CS_PULLDOWN ISSI_CSPULLUP
-#endif
-#ifdef ISSI_GLOBALCURRENT
-#    define IS31FL3736_GLOBAL_CURRENT ISSI_GLOBALCURRENT
-#endif
-
-#define is31_led is31fl3736_led_t
-#define g_is31_leds g_is31fl3736_leds
-
-#define PUR_0R IS31FL3736_PUR_0_OHM
-#define PUR_05KR IS31FL3736_PUR_05K_OHM
-#define PUR_1KR IS31FL3736_PUR_1K_OHM
-#define PUR_2KR IS31FL3736_PUR_2K_OHM
-#define PUR_4KR IS31FL3736_PUR_4K_OHM
-#define PUR_8KR IS31FL3736_PUR_8K_OHM
-#define PUR_16KR IS31FL3736_PUR_16K_OHM
-#define PUR_32KR IS31FL3736_PUR_32K_OHM
-// ========
-
-#define IS31FL3736_REG_INTERRUPT_MASK 0xF0
-#define IS31FL3736_REG_INTERRUPT_STATUS 0xF1
-
-#define IS31FL3736_REG_COMMAND 0xFD
-
-#define IS31FL3736_COMMAND_LED_CONTROL 0x00
-#define IS31FL3736_COMMAND_PWM 0x01
-#define IS31FL3736_COMMAND_AUTO_BREATH 0x02
-#define IS31FL3736_COMMAND_FUNCTION 0x03
-
-#define IS31FL3736_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3736_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3736_FUNCTION_REG_SW_PULLUP 0x0F
-#define IS31FL3736_FUNCTION_REG_CS_PULLDOWN 0x10
-#define IS31FL3736_FUNCTION_REG_RESET 0x11
-
-#define IS31FL3736_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3736_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3736_I2C_ADDRESS_GND_GND 0x50
-#define IS31FL3736_I2C_ADDRESS_GND_SCL 0x51
-#define IS31FL3736_I2C_ADDRESS_GND_SDA 0x52
-#define IS31FL3736_I2C_ADDRESS_GND_VCC 0x53
-#define IS31FL3736_I2C_ADDRESS_SCL_GND 0x54
-#define IS31FL3736_I2C_ADDRESS_SCL_SCL 0x55
-#define IS31FL3736_I2C_ADDRESS_SCL_SDA 0x56
-#define IS31FL3736_I2C_ADDRESS_SCL_VCC 0x57
-#define IS31FL3736_I2C_ADDRESS_SDA_GND 0x58
-#define IS31FL3736_I2C_ADDRESS_SDA_SCL 0x59
-#define IS31FL3736_I2C_ADDRESS_SDA_SDA 0x5A
-#define IS31FL3736_I2C_ADDRESS_SDA_VCC 0x5B
-#define IS31FL3736_I2C_ADDRESS_VCC_GND 0x5C
-#define IS31FL3736_I2C_ADDRESS_VCC_SCL 0x5D
-#define IS31FL3736_I2C_ADDRESS_VCC_SDA 0x5E
-#define IS31FL3736_I2C_ADDRESS_VCC_VCC 0x5F
-
-#if defined(LED_MATRIX_IS31FL3736)
-#    define IS31FL3736_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3736_I2C_ADDRESS_4)
-#    define IS31FL3736_DRIVER_COUNT 4
-#elif defined(IS31FL3736_I2C_ADDRESS_3)
-#    define IS31FL3736_DRIVER_COUNT 3
-#elif defined(IS31FL3736_I2C_ADDRESS_2)
-#    define IS31FL3736_DRIVER_COUNT 2
-#elif defined(IS31FL3736_I2C_ADDRESS_1)
-#    define IS31FL3736_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3736_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3736_led_t;
-
-extern const is31fl3736_led_t PROGMEM g_is31fl3736_leds[IS31FL3736_LED_COUNT];
-
-void is31fl3736_init_drivers(void);
-void is31fl3736_init(uint8_t addr);
-void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3736_select_page(uint8_t addr, uint8_t page);
-void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3736_set_value(int index, uint8_t value);
-void is31fl3736_set_value_all(uint8_t value);
-
-void is31fl3736_set_led_control_register(uint8_t index, bool value);
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index);
-
-void is31fl3736_flush(void);
-
-#define IS31FL3736_PDR_0_OHM 0b000   // No pull-down resistor
-#define IS31FL3736_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3736_PDR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3736_PDR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3736_PDR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3736_PDR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3736_PDR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3736_PDR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3736_PUR_0_OHM 0b000   // No pull-up resistor
-#define IS31FL3736_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3736_PUR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3736_PUR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3736_PUR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3736_PUR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3736_PUR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3736_PUR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3736_PWM_FREQUENCY_8K4_HZ 0b000
-#define IS31FL3736_PWM_FREQUENCY_4K2_HZ 0b001
-#define IS31FL3736_PWM_FREQUENCY_26K7_HZ 0b010
-#define IS31FL3736_PWM_FREQUENCY_2K1_HZ 0b011
-#define IS31FL3736_PWM_FREQUENCY_1K05_HZ 0b100
-
-#define A_1 0x00
-#define A_2 0x02
-#define A_3 0x04
-#define A_4 0x06
-#define A_5 0x08
-#define A_6 0x0A
-#define A_7 0x0C
-#define A_8 0x0E
-
-#define B_1 0x10
-#define B_2 0x12
-#define B_3 0x14
-#define B_4 0x16
-#define B_5 0x18
-#define B_6 0x1A
-#define B_7 0x1C
-#define B_8 0x1E
-
-#define C_1 0x20
-#define C_2 0x22
-#define C_3 0x24
-#define C_4 0x26
-#define C_5 0x28
-#define C_6 0x2A
-#define C_7 0x2C
-#define C_8 0x2E
-
-#define D_1 0x30
-#define D_2 0x32
-#define D_3 0x34
-#define D_4 0x36
-#define D_5 0x38
-#define D_6 0x3A
-#define D_7 0x3C
-#define D_8 0x3E
-
-#define E_1 0x40
-#define E_2 0x42
-#define E_3 0x44
-#define E_4 0x46
-#define E_5 0x48
-#define E_6 0x4A
-#define E_7 0x4C
-#define E_8 0x4E
-
-#define F_1 0x50
-#define F_2 0x52
-#define F_3 0x54
-#define F_4 0x56
-#define F_5 0x58
-#define F_6 0x5A
-#define F_7 0x5C
-#define F_8 0x5E
-
-#define G_1 0x60
-#define G_2 0x62
-#define G_3 0x64
-#define G_4 0x66
-#define G_5 0x68
-#define G_6 0x6A
-#define G_7 0x6C
-#define G_8 0x6E
-
-#define H_1 0x70
-#define H_2 0x72
-#define H_3 0x74
-#define H_4 0x76
-#define H_5 0x78
-#define H_6 0x7A
-#define H_7 0x7C
-#define H_8 0x7E
-
-#define I_1 0x80
-#define I_2 0x82
-#define I_3 0x84
-#define I_4 0x86
-#define I_5 0x88
-#define I_6 0x8A
-#define I_7 0x8C
-#define I_8 0x8E
-
-#define J_1 0x90
-#define J_2 0x92
-#define J_3 0x94
-#define J_4 0x96
-#define J_5 0x98
-#define J_6 0x9A
-#define J_7 0x9C
-#define J_8 0x9E
-
-#define K_1 0xA0
-#define K_2 0xA2
-#define K_3 0xA4
-#define K_4 0xA6
-#define K_5 0xA8
-#define K_6 0xAA
-#define K_7 0xAC
-#define K_8 0xAE
-
-#define L_1 0xB0
-#define L_2 0xB2
-#define L_3 0xB4
-#define L_4 0xB6
-#define L_5 0xB8
-#define L_6 0xBA
-#define L_7 0xBC
-#define L_8 0xBE
diff --git a/drivers/led/issi/is31fl3737-mono.c b/drivers/led/issi/is31fl3737-mono.c
new file mode 100644
index 0000000000..56f169550b
--- /dev/null
+++ b/drivers/led/issi/is31fl3737-mono.c
@@ -0,0 +1,241 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "is31fl3737-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3737_PWM_REGISTER_COUNT 192 // actually 144
+#define IS31FL3737_LED_CONTROL_REGISTER_COUNT 24
+
+#ifndef IS31FL3737_I2C_TIMEOUT
+#    define IS31FL3737_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3737_I2C_PERSISTENCE
+#    define IS31FL3737_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3737_PWM_FREQUENCY
+#    define IS31FL3737_PWM_FREQUENCY IS31FL3737_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3737B only
+#endif
+
+#ifndef IS31FL3737_SW_PULLUP
+#    define IS31FL3737_SW_PULLUP IS31FL3737_PUR_0_OHM
+#endif
+
+#ifndef IS31FL3737_CS_PULLDOWN
+#    define IS31FL3737_CS_PULLDOWN IS31FL3737_PDR_0_OHM
+#endif
+
+#ifndef IS31FL3737_GLOBAL_CURRENT
+#    define IS31FL3737_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20];
+
+// These buffers match the IS31FL3737 PWM registers.
+// The control buffers match the page 0 LED On/Off registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in is31fl3737_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+
+uint8_t g_pwm_buffer[IS31FL3737_DRIVER_COUNT][IS31FL3737_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_REGISTER_COUNT] = {0};
+bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT]                        = {false};
+
+void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3737_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3737_select_page(uint8_t addr, uint8_t page) {
+    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, page);
+}
+
+void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // assumes page 1 is already selected
+
+    // transmit PWM registers in 12 transfers of 16 bytes
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // iterate over the pwm_buffer contents at 16 byte intervals
+    for (int i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // copy the data from i to i+15
+        // device will auto-increment register for data after the first byte
+        // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3737_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT) == 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3737_init_drivers(void) {
+    i2c_init();
+
+    is31fl3737_init(IS31FL3737_I2C_ADDRESS_1);
+#if defined(IS31FL3737_I2C_ADDRESS_2)
+    is31fl3737_init(IS31FL3737_I2C_ADDRESS_2);
+#    if defined(IS31FL3737_I2C_ADDRESS_3)
+    is31fl3737_init(IS31FL3737_I2C_ADDRESS_3);
+#        if defined(IS31FL3737_I2C_ADDRESS_4)
+    is31fl3737_init(IS31FL3737_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3737_LED_COUNT; i++) {
+        is31fl3737_set_led_control_register(i, true);
+    }
+
+    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3737_I2C_ADDRESS_2)
+    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3737_I2C_ADDRESS_3)
+    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3737_I2C_ADDRESS_4)
+    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3737_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
+        is31fl3737_write_register(addr, i, 0x00);
+    }
+
+    is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
+
+    // Set PWM on all LEDs to 0
+    // No need to setup Breath registers to PWM as that is the default.
+    for (int i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i++) {
+        is31fl3737_write_register(addr, i, 0x00);
+    }
+
+    is31fl3737_select_page(addr, IS31FL3737_COMMAND_FUNCTION);
+
+    // Set de-ghost pull-up resistors (SWx)
+    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP);
+    // Set de-ghost pull-down resistors (CSx)
+    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CS_PULLDOWN, IS31FL3737_CS_PULLDOWN);
+    // Set global current to maximum.
+    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3737_GLOBAL_CURRENT);
+    // Disable software shutdown.
+    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3737_set_value(int index, uint8_t value) {
+    is31fl3737_led_t led;
+    if (index >= 0 && index < IS31FL3737_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3737_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3737_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3737_LED_COUNT; i++) {
+        is31fl3737_set_value(i, value);
+    }
+}
+
+void is31fl3737_set_led_control_register(uint8_t index, bool value) {
+    is31fl3737_led_t led;
+    memcpy_P(&led, (&g_is31fl3737_leds[index]), sizeof(led));
+
+    uint8_t control_register = led.v / 8;
+    uint8_t bit_value        = led.v % 8;
+
+    if (value) {
+        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required[led.driver] = true;
+}
+
+void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
+
+        is31fl3737_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
+
+        for (int i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
+            is31fl3737_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+        g_led_control_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3737_flush(void) {
+    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3737_I2C_ADDRESS_2)
+    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3737_I2C_ADDRESS_3)
+    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3737_I2C_ADDRESS_4)
+    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3737-mono.h b/drivers/led/issi/is31fl3737-mono.h
new file mode 100644
index 0000000000..a11d2ef423
--- /dev/null
+++ b/drivers/led/issi/is31fl3737-mono.h
@@ -0,0 +1,300 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2021 Doni Crosby
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3737_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3737_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_PWM_FREQUENCY
+#    define IS31FL3737_PWM_FREQUENCY ISSI_PWM_FREQUENCY
+#endif
+#ifdef ISSI_SWPULLUP
+#    define IS31FL3737_SW_PULLUP ISSI_SWPULLUP
+#endif
+#ifdef ISSI_CSPULLUP
+#    define IS31FL3737_CS_PULLDOWN ISSI_CSPULLUP
+#endif
+#ifdef ISSI_GLOBALCURRENT
+#    define IS31FL3737_GLOBAL_CURRENT ISSI_GLOBALCURRENT
+#endif
+
+#define PUR_0R IS31FL3737_PUR_0_OHM
+#define PUR_05KR IS31FL3737_PUR_0K5_OHM
+#define PUR_1KR IS31FL3737_PUR_1K_OHM
+#define PUR_2KR IS31FL3737_PUR_2K_OHM
+#define PUR_4KR IS31FL3737_PUR_4K_OHM
+#define PUR_8KR IS31FL3737_PUR_8K_OHM
+#define PUR_16KR IS31FL3737_PUR_16K_OHM
+#define PUR_32KR IS31FL3737_PUR_32K_OHM
+// ========
+
+#define IS31FL3737_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3737_REG_INTERRUPT_STATUS 0xF1
+
+#define IS31FL3737_REG_COMMAND 0xFD
+
+#define IS31FL3737_COMMAND_LED_CONTROL 0x00
+#define IS31FL3737_COMMAND_PWM 0x01
+#define IS31FL3737_COMMAND_AUTO_BREATH 0x02
+#define IS31FL3737_COMMAND_FUNCTION 0x03
+
+#define IS31FL3737_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3737_FUNCTION_REG_SW_PULLUP 0x0F
+#define IS31FL3737_FUNCTION_REG_CS_PULLDOWN 0x10
+#define IS31FL3737_FUNCTION_REG_RESET 0x11
+
+#define IS31FL3737_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3737_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3737_I2C_ADDRESS_GND 0x50
+#define IS31FL3737_I2C_ADDRESS_SCL 0x55
+#define IS31FL3737_I2C_ADDRESS_SDA 0x5A
+#define IS31FL3737_I2C_ADDRESS_VCC 0x5F
+
+#if defined(LED_MATRIX_IS31FL3737)
+#    define IS31FL3737_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3737_I2C_ADDRESS_4)
+#    define IS31FL3737_DRIVER_COUNT 4
+#elif defined(IS31FL3737_I2C_ADDRESS_3)
+#    define IS31FL3737_DRIVER_COUNT 3
+#elif defined(IS31FL3737_I2C_ADDRESS_2)
+#    define IS31FL3737_DRIVER_COUNT 2
+#elif defined(IS31FL3737_I2C_ADDRESS_1)
+#    define IS31FL3737_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3737_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3737_led_t;
+
+extern const is31fl3737_led_t PROGMEM g_is31fl3737_leds[IS31FL3737_LED_COUNT];
+
+void is31fl3737_init_drivers(void);
+void is31fl3737_init(uint8_t addr);
+void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3737_select_page(uint8_t addr, uint8_t page);
+void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3737_set_value(int index, uint8_t value);
+void is31fl3737_set_value_all(uint8_t value);
+
+void is31fl3737_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index);
+
+void is31fl3737_flush(void);
+
+#define IS31FL3737_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3737_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3737_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3737_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3737_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3737_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3737_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3737_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3737_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3737_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3737_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3737_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3737_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3737_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3737_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3737_PUR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3737_PWM_FREQUENCY_8K4_HZ 0b000
+#define IS31FL3737_PWM_FREQUENCY_4K2_HZ 0b001
+#define IS31FL3737_PWM_FREQUENCY_26K7_HZ 0b010
+#define IS31FL3737_PWM_FREQUENCY_2K1_HZ 0b011
+#define IS31FL3737_PWM_FREQUENCY_1K05_HZ 0b100
+
+#define A_1 0x00
+#define A_2 0x01
+#define A_3 0x02
+#define A_4 0x03
+#define A_5 0x04
+#define A_6 0x05
+#define A_7 0x08
+#define A_8 0x09
+#define A_9 0x0A
+#define A_10 0x0B
+#define A_11 0x0C
+#define A_12 0x0D
+
+#define B_1 0x10
+#define B_2 0x11
+#define B_3 0x12
+#define B_4 0x13
+#define B_5 0x14
+#define B_6 0x15
+#define B_7 0x18
+#define B_8 0x19
+#define B_9 0x1A
+#define B_10 0x1B
+#define B_11 0x1C
+#define B_12 0x1D
+
+#define C_1 0x20
+#define C_2 0x21
+#define C_3 0x22
+#define C_4 0x23
+#define C_5 0x24
+#define C_6 0x25
+#define C_7 0x28
+#define C_8 0x29
+#define C_9 0x2A
+#define C_10 0x2B
+#define C_11 0x2C
+#define C_12 0x2D
+
+#define D_1 0x30
+#define D_2 0x31
+#define D_3 0x32
+#define D_4 0x33
+#define D_5 0x34
+#define D_6 0x35
+#define D_7 0x38
+#define D_8 0x39
+#define D_9 0x3A
+#define D_10 0x3B
+#define D_11 0x3C
+#define D_12 0x3D
+
+#define E_1 0x40
+#define E_2 0x41
+#define E_3 0x42
+#define E_4 0x43
+#define E_5 0x44
+#define E_6 0x45
+#define E_7 0x48
+#define E_8 0x49
+#define E_9 0x4A
+#define E_10 0x4B
+#define E_11 0x4C
+#define E_12 0x4D
+
+#define F_1 0x50
+#define F_2 0x51
+#define F_3 0x52
+#define F_4 0x53
+#define F_5 0x54
+#define F_6 0x55
+#define F_7 0x58
+#define F_8 0x59
+#define F_9 0x5A
+#define F_10 0x5B
+#define F_11 0x5C
+#define F_12 0x5D
+
+#define G_1 0x60
+#define G_2 0x61
+#define G_3 0x62
+#define G_4 0x63
+#define G_5 0x64
+#define G_6 0x65
+#define G_7 0x68
+#define G_8 0x69
+#define G_9 0x6A
+#define G_10 0x6B
+#define G_11 0x6C
+#define G_12 0x6D
+
+#define H_1 0x70
+#define H_2 0x71
+#define H_3 0x72
+#define H_4 0x73
+#define H_5 0x74
+#define H_6 0x75
+#define H_7 0x78
+#define H_8 0x79
+#define H_9 0x7A
+#define H_10 0x7B
+#define H_11 0x7C
+#define H_12 0x7D
+
+#define I_1 0x80
+#define I_2 0x81
+#define I_3 0x82
+#define I_4 0x83
+#define I_5 0x84
+#define I_6 0x85
+#define I_7 0x88
+#define I_8 0x89
+#define I_9 0x8A
+#define I_10 0x8B
+#define I_11 0x8C
+#define I_12 0x8D
+
+#define J_1 0x90
+#define J_2 0x91
+#define J_3 0x92
+#define J_4 0x93
+#define J_5 0x94
+#define J_6 0x95
+#define J_7 0x98
+#define J_8 0x99
+#define J_9 0x9A
+#define J_10 0x9B
+#define J_11 0x9C
+#define J_12 0x9D
+
+#define K_1 0xA0
+#define K_2 0xA1
+#define K_3 0xA2
+#define K_4 0xA3
+#define K_5 0xA4
+#define K_6 0xA5
+#define K_7 0xA8
+#define K_8 0xA9
+#define K_9 0xAA
+#define K_10 0xAB
+#define K_11 0xAC
+#define K_12 0xAD
+
+#define L_1 0xB0
+#define L_2 0xB1
+#define L_3 0xB2
+#define L_4 0xB3
+#define L_5 0xB4
+#define L_6 0xB5
+#define L_7 0xB8
+#define L_8 0xB9
+#define L_9 0xBA
+#define L_10 0xBB
+#define L_11 0xBC
+#define L_12 0xBD
diff --git a/drivers/led/issi/is31fl3737-simple.c b/drivers/led/issi/is31fl3737-simple.c
deleted file mode 100644
index 967a102b48..0000000000
--- a/drivers/led/issi/is31fl3737-simple.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2021 Doni Crosby
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "is31fl3737-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3737_PWM_REGISTER_COUNT 192 // actually 144
-#define IS31FL3737_LED_CONTROL_REGISTER_COUNT 24
-
-#ifndef IS31FL3737_I2C_TIMEOUT
-#    define IS31FL3737_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3737_I2C_PERSISTENCE
-#    define IS31FL3737_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3737_PWM_FREQUENCY
-#    define IS31FL3737_PWM_FREQUENCY IS31FL3737_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3737B only
-#endif
-
-#ifndef IS31FL3737_SW_PULLUP
-#    define IS31FL3737_SW_PULLUP IS31FL3737_PUR_0_OHM
-#endif
-
-#ifndef IS31FL3737_CS_PULLDOWN
-#    define IS31FL3737_CS_PULLDOWN IS31FL3737_PDR_0_OHM
-#endif
-
-#ifndef IS31FL3737_GLOBAL_CURRENT
-#    define IS31FL3737_GLOBAL_CURRENT 0xFF
-#endif
-
-uint8_t i2c_transfer_buffer[20];
-
-// These buffers match the IS31FL3737 PWM registers.
-// The control buffers match the page 0 LED On/Off registers.
-// Storing them like this is optimal for I2C transfers to the registers.
-// We could optimize this and take out the unused registers from these
-// buffers and the transfers in is31fl3737_write_pwm_buffer() but it's
-// probably not worth the extra complexity.
-
-uint8_t g_pwm_buffer[IS31FL3737_DRIVER_COUNT][IS31FL3737_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3737_DRIVER_COUNT] = {false};
-
-uint8_t g_led_control_registers[IS31FL3737_DRIVER_COUNT][IS31FL3737_LED_CONTROL_REGISTER_COUNT] = {0};
-bool    g_led_control_registers_update_required[IS31FL3737_DRIVER_COUNT]                        = {false};
-
-void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3737_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3737_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3737_select_page(uint8_t addr, uint8_t page) {
-    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND_WRITE_LOCK, IS31FL3737_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3737_write_register(addr, IS31FL3737_REG_COMMAND, page);
-}
-
-void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // assumes page 1 is already selected
-
-    // transmit PWM registers in 12 transfers of 16 bytes
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // iterate over the pwm_buffer contents at 16 byte intervals
-    for (int i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i;
-        // copy the data from i to i+15
-        // device will auto-increment register for data after the first byte
-        // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3737_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3737_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT) == 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3737_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3737_init_drivers(void) {
-    i2c_init();
-
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_1);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_2);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_3);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_init(IS31FL3737_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3737_LED_COUNT; i++) {
-        is31fl3737_set_led_control_register(i, true);
-    }
-
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_update_led_control_registers(IS31FL3737_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3737_init(uint8_t addr) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
-        is31fl3737_write_register(addr, i, 0x00);
-    }
-
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
-
-    // Set PWM on all LEDs to 0
-    // No need to setup Breath registers to PWM as that is the default.
-    for (int i = 0; i < IS31FL3737_PWM_REGISTER_COUNT; i++) {
-        is31fl3737_write_register(addr, i, 0x00);
-    }
-
-    is31fl3737_select_page(addr, IS31FL3737_COMMAND_FUNCTION);
-
-    // Set de-ghost pull-up resistors (SWx)
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_SW_PULLUP, IS31FL3737_SW_PULLUP);
-    // Set de-ghost pull-down resistors (CSx)
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CS_PULLDOWN, IS31FL3737_CS_PULLDOWN);
-    // Set global current to maximum.
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3737_GLOBAL_CURRENT);
-    // Disable software shutdown.
-    is31fl3737_write_register(addr, IS31FL3737_FUNCTION_REG_CONFIGURATION, ((IS31FL3737_PWM_FREQUENCY & 0b111) << 3) | 0x01);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3737_set_value(int index, uint8_t value) {
-    is31fl3737_led_t led;
-    if (index >= 0 && index < IS31FL3737_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3737_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer[led.driver][led.v]          = value;
-        g_pwm_buffer_update_required[led.driver] = true;
-    }
-}
-
-void is31fl3737_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3737_LED_COUNT; i++) {
-        is31fl3737_set_value(i, value);
-    }
-}
-
-void is31fl3737_set_led_control_register(uint8_t index, bool value) {
-    is31fl3737_led_t led;
-    memcpy_P(&led, (&g_is31fl3737_leds[index]), sizeof(led));
-
-    uint8_t control_register = led.v / 8;
-    uint8_t bit_value        = led.v % 8;
-
-    if (value) {
-        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
-    } else {
-        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
-    }
-
-    g_led_control_registers_update_required[led.driver] = true;
-}
-
-void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3737_select_page(addr, IS31FL3737_COMMAND_PWM);
-
-        is31fl3737_write_pwm_buffer(addr, g_pwm_buffer[index]);
-        g_pwm_buffer_update_required[index] = false;
-    }
-}
-
-void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_led_control_registers_update_required[index]) {
-        is31fl3737_select_page(addr, IS31FL3737_COMMAND_LED_CONTROL);
-
-        for (int i = 0; i < IS31FL3737_LED_CONTROL_REGISTER_COUNT; i++) {
-            is31fl3737_write_register(addr, i, g_led_control_registers[index][i]);
-        }
-        g_led_control_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3737_flush(void) {
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3737_I2C_ADDRESS_2)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3737_I2C_ADDRESS_3)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3737_I2C_ADDRESS_4)
-    is31fl3737_update_pwm_buffers(IS31FL3737_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3737-simple.h b/drivers/led/issi/is31fl3737-simple.h
deleted file mode 100644
index a11d2ef423..0000000000
--- a/drivers/led/issi/is31fl3737-simple.h
+++ /dev/null
@@ -1,300 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2021 Doni Crosby
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-// ======== DEPRECATED DEFINES - DO NOT USE ========
-#ifdef ISSI_TIMEOUT
-#    define IS31FL3737_I2C_TIMEOUT ISSI_TIMEOUT
-#endif
-#ifdef ISSI_PERSISTENCE
-#    define IS31FL3737_I2C_PERSISTENCE ISSI_PERSISTENCE
-#endif
-#ifdef ISSI_PWM_FREQUENCY
-#    define IS31FL3737_PWM_FREQUENCY ISSI_PWM_FREQUENCY
-#endif
-#ifdef ISSI_SWPULLUP
-#    define IS31FL3737_SW_PULLUP ISSI_SWPULLUP
-#endif
-#ifdef ISSI_CSPULLUP
-#    define IS31FL3737_CS_PULLDOWN ISSI_CSPULLUP
-#endif
-#ifdef ISSI_GLOBALCURRENT
-#    define IS31FL3737_GLOBAL_CURRENT ISSI_GLOBALCURRENT
-#endif
-
-#define PUR_0R IS31FL3737_PUR_0_OHM
-#define PUR_05KR IS31FL3737_PUR_0K5_OHM
-#define PUR_1KR IS31FL3737_PUR_1K_OHM
-#define PUR_2KR IS31FL3737_PUR_2K_OHM
-#define PUR_4KR IS31FL3737_PUR_4K_OHM
-#define PUR_8KR IS31FL3737_PUR_8K_OHM
-#define PUR_16KR IS31FL3737_PUR_16K_OHM
-#define PUR_32KR IS31FL3737_PUR_32K_OHM
-// ========
-
-#define IS31FL3737_REG_INTERRUPT_MASK 0xF0
-#define IS31FL3737_REG_INTERRUPT_STATUS 0xF1
-
-#define IS31FL3737_REG_COMMAND 0xFD
-
-#define IS31FL3737_COMMAND_LED_CONTROL 0x00
-#define IS31FL3737_COMMAND_PWM 0x01
-#define IS31FL3737_COMMAND_AUTO_BREATH 0x02
-#define IS31FL3737_COMMAND_FUNCTION 0x03
-
-#define IS31FL3737_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3737_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3737_FUNCTION_REG_SW_PULLUP 0x0F
-#define IS31FL3737_FUNCTION_REG_CS_PULLDOWN 0x10
-#define IS31FL3737_FUNCTION_REG_RESET 0x11
-
-#define IS31FL3737_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3737_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3737_I2C_ADDRESS_GND 0x50
-#define IS31FL3737_I2C_ADDRESS_SCL 0x55
-#define IS31FL3737_I2C_ADDRESS_SDA 0x5A
-#define IS31FL3737_I2C_ADDRESS_VCC 0x5F
-
-#if defined(LED_MATRIX_IS31FL3737)
-#    define IS31FL3737_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3737_I2C_ADDRESS_4)
-#    define IS31FL3737_DRIVER_COUNT 4
-#elif defined(IS31FL3737_I2C_ADDRESS_3)
-#    define IS31FL3737_DRIVER_COUNT 3
-#elif defined(IS31FL3737_I2C_ADDRESS_2)
-#    define IS31FL3737_DRIVER_COUNT 2
-#elif defined(IS31FL3737_I2C_ADDRESS_1)
-#    define IS31FL3737_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3737_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3737_led_t;
-
-extern const is31fl3737_led_t PROGMEM g_is31fl3737_leds[IS31FL3737_LED_COUNT];
-
-void is31fl3737_init_drivers(void);
-void is31fl3737_init(uint8_t addr);
-void is31fl3737_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3737_select_page(uint8_t addr, uint8_t page);
-void is31fl3737_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3737_set_value(int index, uint8_t value);
-void is31fl3737_set_value_all(uint8_t value);
-
-void is31fl3737_set_led_control_register(uint8_t index, bool value);
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3737_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3737_update_led_control_registers(uint8_t addr, uint8_t index);
-
-void is31fl3737_flush(void);
-
-#define IS31FL3737_PDR_0_OHM 0b000   // No pull-down resistor
-#define IS31FL3737_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3737_PDR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3737_PDR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3737_PDR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3737_PDR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3737_PDR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3737_PDR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3737_PUR_0_OHM 0b000   // No pull-up resistor
-#define IS31FL3737_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3737_PUR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3737_PUR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3737_PUR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3737_PUR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3737_PUR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3737_PUR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3737_PWM_FREQUENCY_8K4_HZ 0b000
-#define IS31FL3737_PWM_FREQUENCY_4K2_HZ 0b001
-#define IS31FL3737_PWM_FREQUENCY_26K7_HZ 0b010
-#define IS31FL3737_PWM_FREQUENCY_2K1_HZ 0b011
-#define IS31FL3737_PWM_FREQUENCY_1K05_HZ 0b100
-
-#define A_1 0x00
-#define A_2 0x01
-#define A_3 0x02
-#define A_4 0x03
-#define A_5 0x04
-#define A_6 0x05
-#define A_7 0x08
-#define A_8 0x09
-#define A_9 0x0A
-#define A_10 0x0B
-#define A_11 0x0C
-#define A_12 0x0D
-
-#define B_1 0x10
-#define B_2 0x11
-#define B_3 0x12
-#define B_4 0x13
-#define B_5 0x14
-#define B_6 0x15
-#define B_7 0x18
-#define B_8 0x19
-#define B_9 0x1A
-#define B_10 0x1B
-#define B_11 0x1C
-#define B_12 0x1D
-
-#define C_1 0x20
-#define C_2 0x21
-#define C_3 0x22
-#define C_4 0x23
-#define C_5 0x24
-#define C_6 0x25
-#define C_7 0x28
-#define C_8 0x29
-#define C_9 0x2A
-#define C_10 0x2B
-#define C_11 0x2C
-#define C_12 0x2D
-
-#define D_1 0x30
-#define D_2 0x31
-#define D_3 0x32
-#define D_4 0x33
-#define D_5 0x34
-#define D_6 0x35
-#define D_7 0x38
-#define D_8 0x39
-#define D_9 0x3A
-#define D_10 0x3B
-#define D_11 0x3C
-#define D_12 0x3D
-
-#define E_1 0x40
-#define E_2 0x41
-#define E_3 0x42
-#define E_4 0x43
-#define E_5 0x44
-#define E_6 0x45
-#define E_7 0x48
-#define E_8 0x49
-#define E_9 0x4A
-#define E_10 0x4B
-#define E_11 0x4C
-#define E_12 0x4D
-
-#define F_1 0x50
-#define F_2 0x51
-#define F_3 0x52
-#define F_4 0x53
-#define F_5 0x54
-#define F_6 0x55
-#define F_7 0x58
-#define F_8 0x59
-#define F_9 0x5A
-#define F_10 0x5B
-#define F_11 0x5C
-#define F_12 0x5D
-
-#define G_1 0x60
-#define G_2 0x61
-#define G_3 0x62
-#define G_4 0x63
-#define G_5 0x64
-#define G_6 0x65
-#define G_7 0x68
-#define G_8 0x69
-#define G_9 0x6A
-#define G_10 0x6B
-#define G_11 0x6C
-#define G_12 0x6D
-
-#define H_1 0x70
-#define H_2 0x71
-#define H_3 0x72
-#define H_4 0x73
-#define H_5 0x74
-#define H_6 0x75
-#define H_7 0x78
-#define H_8 0x79
-#define H_9 0x7A
-#define H_10 0x7B
-#define H_11 0x7C
-#define H_12 0x7D
-
-#define I_1 0x80
-#define I_2 0x81
-#define I_3 0x82
-#define I_4 0x83
-#define I_5 0x84
-#define I_6 0x85
-#define I_7 0x88
-#define I_8 0x89
-#define I_9 0x8A
-#define I_10 0x8B
-#define I_11 0x8C
-#define I_12 0x8D
-
-#define J_1 0x90
-#define J_2 0x91
-#define J_3 0x92
-#define J_4 0x93
-#define J_5 0x94
-#define J_6 0x95
-#define J_7 0x98
-#define J_8 0x99
-#define J_9 0x9A
-#define J_10 0x9B
-#define J_11 0x9C
-#define J_12 0x9D
-
-#define K_1 0xA0
-#define K_2 0xA1
-#define K_3 0xA2
-#define K_4 0xA3
-#define K_5 0xA4
-#define K_6 0xA5
-#define K_7 0xA8
-#define K_8 0xA9
-#define K_9 0xAA
-#define K_10 0xAB
-#define K_11 0xAC
-#define K_12 0xAD
-
-#define L_1 0xB0
-#define L_2 0xB1
-#define L_3 0xB2
-#define L_4 0xB3
-#define L_5 0xB4
-#define L_6 0xB5
-#define L_7 0xB8
-#define L_8 0xB9
-#define L_9 0xBA
-#define L_10 0xBB
-#define L_11 0xBC
-#define L_12 0xBD
diff --git a/drivers/led/issi/is31fl3741-mono.c b/drivers/led/issi/is31fl3741-mono.c
new file mode 100644
index 0000000000..72260654ef
--- /dev/null
+++ b/drivers/led/issi/is31fl3741-mono.c
@@ -0,0 +1,271 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "is31fl3741-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3741_PWM_REGISTER_COUNT 351
+#define IS31FL3741_SCALING_REGISTER_COUNT 351
+
+#ifndef IS31FL3741_I2C_TIMEOUT
+#    define IS31FL3741_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3741_I2C_PERSISTENCE
+#    define IS31FL3741_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3741_CONFIGURATION
+#    define IS31FL3741_CONFIGURATION 0x01
+#endif
+
+#ifndef IS31FL3741_PWM_FREQUENCY
+#    define IS31FL3741_PWM_FREQUENCY IS31FL3741_PWM_FREQUENCY_29K_HZ
+#endif
+
+#ifndef IS31FL3741_SW_PULLUP
+#    define IS31FL3741_SW_PULLUP IS31FL3741_PUR_32K_OHM
+#endif
+
+#ifndef IS31FL3741_CS_PULLDOWN
+#    define IS31FL3741_CS_PULLDOWN IS31FL3741_PDR_32K_OHM
+#endif
+
+#ifndef IS31FL3741_GLOBAL_CURRENT
+#    define IS31FL3741_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+// These buffers match the IS31FL3741 and IS31FL3741A PWM registers.
+// The scaling buffers match the page 2 and 3 LED On/Off registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in is31fl3741_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[IS31FL3741_DRIVER_COUNT][IS31FL3741_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3741_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_SCALING_REGISTER_COUNT];
+
+void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3741_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3741_select_page(uint8_t addr, uint8_t page) {
+    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND_WRITE_LOCK, IS31FL3741_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND, page);
+}
+
+bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assume page 0 is already selected
+
+    for (int i = 0; i < 342; i += 18) {
+        if (i == 180) {
+            is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_1);
+        }
+
+        i2c_transfer_buffer[0] = i % 180;
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 18);
+
+#if IS31FL3741_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) {
+                return false;
+            }
+        }
+#else
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+#endif
+    }
+
+    // transfer the left cause the total number is 351
+    i2c_transfer_buffer[0] = 162;
+    memcpy(i2c_transfer_buffer + 1, pwm_buffer + 342, 9);
+
+#if IS31FL3741_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+    }
+#else
+    if (i2c_transmit(addr << 1, i2c_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) {
+        return false;
+    }
+#endif
+
+    return true;
+}
+
+void is31fl3741_init_drivers(void) {
+    i2c_init();
+
+    is31fl3741_init(IS31FL3741_I2C_ADDRESS_1);
+#if defined(IS31FL3741_I2C_ADDRESS_2)
+    is31fl3741_init(IS31FL3741_I2C_ADDRESS_2);
+#    if defined(IS31FL3741_I2C_ADDRESS_3)
+    is31fl3741_init(IS31FL3741_I2C_ADDRESS_3);
+#        if defined(IS31FL3741_I2C_ADDRESS_4)
+    is31fl3741_init(IS31FL3741_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3741_LED_COUNT; i++) {
+        is31fl3741_set_led_control_register(i, true);
+    }
+
+    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3741_I2C_ADDRESS_2)
+    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3741_I2C_ADDRESS_3)
+    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3741_I2C_ADDRESS_4)
+    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3741_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+    // Unlock the command register.
+
+    is31fl3741_select_page(addr, IS31FL3741_COMMAND_FUNCTION);
+
+    // Set to Normal operation
+    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
+
+    // Set Golbal Current Control Register
+    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3741_GLOBAL_CURRENT);
+    // Set Pull up & Down for SWx CSy
+    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PULLDOWNUP, ((IS31FL3741_CS_PULLDOWN << 4) | IS31FL3741_SW_PULLUP));
+    // Set PWM frequency
+    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
+
+    // is31fl3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3741_set_value(int index, uint8_t value) {
+    is31fl3741_led_t led;
+    if (index >= 0 && index < IS31FL3741_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer_update_required[led.driver] = true;
+        g_pwm_buffer[led.driver][led.v]          = value;
+    }
+}
+
+void is31fl3741_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3741_LED_COUNT; i++) {
+        is31fl3741_set_value(i, value);
+    }
+}
+
+void is31fl3741_set_led_control_register(uint8_t index, bool value) {
+    is31fl3741_led_t led;
+    memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));
+
+    if (value) {
+        g_scaling_registers[led.driver][led.v] = 0xFF;
+    } else {
+        g_scaling_registers[led.driver][led.v] = 0x00;
+    }
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_0);
+
+        is31fl3741_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t value) {
+    g_pwm_buffer[pled->driver][pled->v] = value;
+
+    g_pwm_buffer_update_required[pled->driver] = true;
+}
+
+void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_0);
+
+        // CS1_SW1 to CS30_SW6 are on page 2
+        for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
+            is31fl3741_write_register(addr, i, g_scaling_registers[index][i]);
+        }
+
+        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_1);
+
+        // CS1_SW7 to CS39_SW9 are on page 3
+        for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
+            is31fl3741_write_register(addr, i - CS1_SW7, g_scaling_registers[index][i]);
+        }
+
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t value) {
+    g_scaling_registers[pled->driver][pled->v] = value;
+
+    g_scaling_registers_update_required[pled->driver] = true;
+}
+
+void is31fl3741_flush(void) {
+    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3741_I2C_ADDRESS_2)
+    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3741_I2C_ADDRESS_3)
+    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3741_I2C_ADDRESS_4)
+    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3741-mono.h b/drivers/led/issi/is31fl3741-mono.h
new file mode 100644
index 0000000000..462543a5bb
--- /dev/null
+++ b/drivers/led/issi/is31fl3741-mono.h
@@ -0,0 +1,517 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef ISSI_TIMEOUT
+#    define IS31FL3741_I2C_TIMEOUT ISSI_TIMEOUT
+#endif
+#ifdef ISSI_PERSISTENCE
+#    define IS31FL3741_I2C_PERSISTENCE ISSI_PERSISTENCE
+#endif
+#ifdef ISSI_CONFIGURATION
+#    define IS31FL3741_CONFIGURATION ISSI_CONFIGURATION
+#endif
+#ifdef ISSI_SWPULLUP
+#    define IS31FL3741_SW_PULLUP ISSI_SWPULLUP
+#endif
+#ifdef ISSI_CSPULLUP
+#    define IS31FL3741_CS_PULLDOWN ISSI_CSPULLUP
+#endif
+#ifdef ISSI_GLOBALCURRENT
+#    define IS31FL3741_GLOBAL_CURRENT ISSI_GLOBALCURRENT
+#endif
+
+#define PUR_0R IS31FL3741_PUR_0_OHM
+#define PUR_05KR IS31FL3741_PUR_0K5_OHM
+#define PUR_1KR IS31FL3741_PUR_1K_OHM
+#define PUR_2KR IS31FL3741_PUR_2K_OHM
+#define PUR_4KR IS31FL3741_PUR_4K_OHM
+#define PUR_8KR IS31FL3741_PUR_8K_OHM
+#define PUR_16KR IS31FL3741_PUR_16K_OHM
+#define PUR_32KR IS31FL3741_PUR_32K_OHM
+// ========
+
+#define IS31FL3741_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3741_REG_INTERRUPT_STATUS 0xF1
+#define IS31FL3741_REG_ID 0xFC
+
+#define IS31FL3741_REG_COMMAND 0xFD
+
+#define IS31FL3741_COMMAND_PWM_0 0x00
+#define IS31FL3741_COMMAND_PWM_1 0x01
+#define IS31FL3741_COMMAND_SCALING_0 0x02
+#define IS31FL3741_COMMAND_SCALING_1 0x03
+#define IS31FL3741_COMMAND_FUNCTION 0x04
+
+#define IS31FL3741_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3741_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3741_FUNCTION_REG_PWM_FREQUENCY 0x36
+#define IS31FL3741_FUNCTION_REG_RESET 0x3F
+
+#define IS31FL3741_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3741_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3741_I2C_ADDRESS_GND 0x30
+#define IS31FL3741_I2C_ADDRESS_SCL 0x31
+#define IS31FL3741_I2C_ADDRESS_SDA 0x32
+#define IS31FL3741_I2C_ADDRESS_VCC 0x33
+
+#if defined(LED_MATRIX_IS31FL3741)
+#    define IS31FL3741_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3741_I2C_ADDRESS_4)
+#    define IS31FL3741_DRIVER_COUNT 4
+#elif defined(IS31FL3741_I2C_ADDRESS_3)
+#    define IS31FL3741_DRIVER_COUNT 3
+#elif defined(IS31FL3741_I2C_ADDRESS_2)
+#    define IS31FL3741_DRIVER_COUNT 2
+#elif defined(IS31FL3741_I2C_ADDRESS_1)
+#    define IS31FL3741_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3741_led_t {
+    uint8_t  driver : 2;
+    uint16_t v : 9;
+} PACKED is31fl3741_led_t;
+
+extern const is31fl3741_led_t PROGMEM g_is31fl3741_leds[IS31FL3741_LED_COUNT];
+
+void is31fl3741_init_drivers(void);
+void is31fl3741_init(uint8_t addr);
+void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3741_select_page(uint8_t addr, uint8_t page);
+bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3741_set_value(int index, uint8_t value);
+void is31fl3741_set_value_all(uint8_t value);
+
+void is31fl3741_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index);
+void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t value);
+
+void is31fl3741_set_pwm_buffer(const is31fl3741_led *pled, uint8_t value);
+
+void is31fl3741_flush(void);
+
+#define IS31FL3741_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3741_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3741_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3741_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3741_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3741_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3741_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3741_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3741_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3741_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3741_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3741_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3741_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3741_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3741_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3741_PUR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3741_PWM_FREQUENCY_29K_HZ 0b0000
+#define IS31FL3741_PWM_FREQUENCY_3K6_HZ 0b0011
+#define IS31FL3741_PWM_FREQUENCY_1K8_HZ 0b0111
+#define IS31FL3741_PWM_FREQUENCY_900_HZ 0b1011
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS19_SW1 0x12
+#define CS20_SW1 0x13
+#define CS21_SW1 0x14
+#define CS22_SW1 0x15
+#define CS23_SW1 0x16
+#define CS24_SW1 0x17
+#define CS25_SW1 0x18
+#define CS26_SW1 0x19
+#define CS27_SW1 0x1A
+#define CS28_SW1 0x1B
+#define CS29_SW1 0x1C
+#define CS30_SW1 0x1D
+
+#define CS1_SW2 0x1E
+#define CS2_SW2 0x1F
+#define CS3_SW2 0x20
+#define CS4_SW2 0x21
+#define CS5_SW2 0x22
+#define CS6_SW2 0x23
+#define CS7_SW2 0x24
+#define CS8_SW2 0x25
+#define CS9_SW2 0x26
+#define CS10_SW2 0x27
+#define CS11_SW2 0x28
+#define CS12_SW2 0x29
+#define CS13_SW2 0x2A
+#define CS14_SW2 0x2B
+#define CS15_SW2 0x2C
+#define CS16_SW2 0x2D
+#define CS17_SW2 0x2E
+#define CS18_SW2 0x2F
+#define CS19_SW2 0x30
+#define CS20_SW2 0x31
+#define CS21_SW2 0x32
+#define CS22_SW2 0x33
+#define CS23_SW2 0x34
+#define CS24_SW2 0x35
+#define CS25_SW2 0x36
+#define CS26_SW2 0x37
+#define CS27_SW2 0x38
+#define CS28_SW2 0x39
+#define CS29_SW2 0x3A
+#define CS30_SW2 0x3B
+
+#define CS1_SW3 0x3C
+#define CS2_SW3 0x3D
+#define CS3_SW3 0x3E
+#define CS4_SW3 0x3F
+#define CS5_SW3 0x40
+#define CS6_SW3 0x41
+#define CS7_SW3 0x42
+#define CS8_SW3 0x43
+#define CS9_SW3 0x44
+#define CS10_SW3 0x45
+#define CS11_SW3 0x46
+#define CS12_SW3 0x47
+#define CS13_SW3 0x48
+#define CS14_SW3 0x49
+#define CS15_SW3 0x4A
+#define CS16_SW3 0x4B
+#define CS17_SW3 0x4C
+#define CS18_SW3 0x4D
+#define CS19_SW3 0x4E
+#define CS20_SW3 0x4F
+#define CS21_SW3 0x50
+#define CS22_SW3 0x51
+#define CS23_SW3 0x52
+#define CS24_SW3 0x53
+#define CS25_SW3 0x54
+#define CS26_SW3 0x55
+#define CS27_SW3 0x56
+#define CS28_SW3 0x57
+#define CS29_SW3 0x58
+#define CS30_SW3 0x59
+
+#define CS1_SW4 0x5A
+#define CS2_SW4 0x5B
+#define CS3_SW4 0x5C
+#define CS4_SW4 0x5D
+#define CS5_SW4 0x5E
+#define CS6_SW4 0x5F
+#define CS7_SW4 0x60
+#define CS8_SW4 0x61
+#define CS9_SW4 0x62
+#define CS10_SW4 0x63
+#define CS11_SW4 0x64
+#define CS12_SW4 0x65
+#define CS13_SW4 0x66
+#define CS14_SW4 0x67
+#define CS15_SW4 0x68
+#define CS16_SW4 0x69
+#define CS17_SW4 0x6A
+#define CS18_SW4 0x6B
+#define CS19_SW4 0x6C
+#define CS20_SW4 0x6D
+#define CS21_SW4 0x6E
+#define CS22_SW4 0x6F
+#define CS23_SW4 0x70
+#define CS24_SW4 0x71
+#define CS25_SW4 0x72
+#define CS26_SW4 0x73
+#define CS27_SW4 0x74
+#define CS28_SW4 0x75
+#define CS29_SW4 0x76
+#define CS30_SW4 0x77
+
+#define CS1_SW5 0x78
+#define CS2_SW5 0x79
+#define CS3_SW5 0x7A
+#define CS4_SW5 0x7B
+#define CS5_SW5 0x7C
+#define CS6_SW5 0x7D
+#define CS7_SW5 0x7E
+#define CS8_SW5 0x7F
+#define CS9_SW5 0x80
+#define CS10_SW5 0x81
+#define CS11_SW5 0x82
+#define CS12_SW5 0x83
+#define CS13_SW5 0x84
+#define CS14_SW5 0x85
+#define CS15_SW5 0x86
+#define CS16_SW5 0x87
+#define CS17_SW5 0x88
+#define CS18_SW5 0x89
+#define CS19_SW5 0x8A
+#define CS20_SW5 0x8B
+#define CS21_SW5 0x8C
+#define CS22_SW5 0x8D
+#define CS23_SW5 0x8E
+#define CS24_SW5 0x8F
+#define CS25_SW5 0x90
+#define CS26_SW5 0x91
+#define CS27_SW5 0x92
+#define CS28_SW5 0x93
+#define CS29_SW5 0x94
+#define CS30_SW5 0x95
+
+#define CS1_SW6 0x96
+#define CS2_SW6 0x97
+#define CS3_SW6 0x98
+#define CS4_SW6 0x99
+#define CS5_SW6 0x9A
+#define CS6_SW6 0x9B
+#define CS7_SW6 0x9C
+#define CS8_SW6 0x9D
+#define CS9_SW6 0x9E
+#define CS10_SW6 0x9F
+#define CS11_SW6 0xA0
+#define CS12_SW6 0xA1
+#define CS13_SW6 0xA2
+#define CS14_SW6 0xA3
+#define CS15_SW6 0xA4
+#define CS16_SW6 0xA5
+#define CS17_SW6 0xA6
+#define CS18_SW6 0xA7
+#define CS19_SW6 0xA8
+#define CS20_SW6 0xA9
+#define CS21_SW6 0xAA
+#define CS22_SW6 0xAB
+#define CS23_SW6 0xAC
+#define CS24_SW6 0xAD
+#define CS25_SW6 0xAE
+#define CS26_SW6 0xAF
+#define CS27_SW6 0xB0
+#define CS28_SW6 0xB1
+#define CS29_SW6 0xB2
+#define CS30_SW6 0xB3
+
+#define CS1_SW7 0xB4
+#define CS2_SW7 0xB5
+#define CS3_SW7 0xB6
+#define CS4_SW7 0xB7
+#define CS5_SW7 0xB8
+#define CS6_SW7 0xB9
+#define CS7_SW7 0xBA
+#define CS8_SW7 0xBB
+#define CS9_SW7 0xBC
+#define CS10_SW7 0xBD
+#define CS11_SW7 0xBE
+#define CS12_SW7 0xBF
+#define CS13_SW7 0xC0
+#define CS14_SW7 0xC1
+#define CS15_SW7 0xC2
+#define CS16_SW7 0xC3
+#define CS17_SW7 0xC4
+#define CS18_SW7 0xC5
+#define CS19_SW7 0xC6
+#define CS20_SW7 0xC7
+#define CS21_SW7 0xC8
+#define CS22_SW7 0xC9
+#define CS23_SW7 0xCA
+#define CS24_SW7 0xCB
+#define CS25_SW7 0xCC
+#define CS26_SW7 0xCD
+#define CS27_SW7 0xCE
+#define CS28_SW7 0xCF
+#define CS29_SW7 0xD0
+#define CS30_SW7 0xD1
+
+#define CS1_SW8 0xD2
+#define CS2_SW8 0xD3
+#define CS3_SW8 0xD4
+#define CS4_SW8 0xD5
+#define CS5_SW8 0xD6
+#define CS6_SW8 0xD7
+#define CS7_SW8 0xD8
+#define CS8_SW8 0xD9
+#define CS9_SW8 0xDA
+#define CS10_SW8 0xDB
+#define CS11_SW8 0xDC
+#define CS12_SW8 0xDD
+#define CS13_SW8 0xDE
+#define CS14_SW8 0xDF
+#define CS15_SW8 0xE0
+#define CS16_SW8 0xE1
+#define CS17_SW8 0xE2
+#define CS18_SW8 0xE3
+#define CS19_SW8 0xE4
+#define CS20_SW8 0xE5
+#define CS21_SW8 0xE6
+#define CS22_SW8 0xE7
+#define CS23_SW8 0xE8
+#define CS24_SW8 0xE9
+#define CS25_SW8 0xEA
+#define CS26_SW8 0xEB
+#define CS27_SW8 0xEC
+#define CS28_SW8 0xED
+#define CS29_SW8 0xEE
+#define CS30_SW8 0xEF
+
+#define CS1_SW9 0xF0
+#define CS2_SW9 0xF1
+#define CS3_SW9 0xF2
+#define CS4_SW9 0xF3
+#define CS5_SW9 0xF4
+#define CS6_SW9 0xF5
+#define CS7_SW9 0xF6
+#define CS8_SW9 0xF7
+#define CS9_SW9 0xF8
+#define CS10_SW9 0xF9
+#define CS11_SW9 0xFA
+#define CS12_SW9 0xFB
+#define CS13_SW9 0xFC
+#define CS14_SW9 0xFD
+#define CS15_SW9 0xFE
+#define CS16_SW9 0xFF
+#define CS17_SW9 0x100
+#define CS18_SW9 0x101
+#define CS19_SW9 0x102
+#define CS20_SW9 0x103
+#define CS21_SW9 0x104
+#define CS22_SW9 0x105
+#define CS23_SW9 0x106
+#define CS24_SW9 0x107
+#define CS25_SW9 0x108
+#define CS26_SW9 0x109
+#define CS27_SW9 0x10A
+#define CS28_SW9 0x10B
+#define CS29_SW9 0x10C
+#define CS30_SW9 0x10D
+
+#define CS31_SW1 0x10E
+#define CS32_SW1 0x10F
+#define CS33_SW1 0x110
+#define CS34_SW1 0x111
+#define CS35_SW1 0x112
+#define CS36_SW1 0x113
+#define CS37_SW1 0x114
+#define CS38_SW1 0x115
+#define CS39_SW1 0x116
+
+#define CS31_SW2 0x117
+#define CS32_SW2 0x118
+#define CS33_SW2 0x119
+#define CS34_SW2 0x11A
+#define CS35_SW2 0x11B
+#define CS36_SW2 0x11C
+#define CS37_SW2 0x11D
+#define CS38_SW2 0x11E
+#define CS39_SW2 0x11F
+
+#define CS31_SW3 0x120
+#define CS32_SW3 0x121
+#define CS33_SW3 0x122
+#define CS34_SW3 0x123
+#define CS35_SW3 0x124
+#define CS36_SW3 0x125
+#define CS37_SW3 0x126
+#define CS38_SW3 0x127
+#define CS39_SW3 0x128
+
+#define CS31_SW4 0x129
+#define CS32_SW4 0x12A
+#define CS33_SW4 0x12B
+#define CS34_SW4 0x12C
+#define CS35_SW4 0x12D
+#define CS36_SW4 0x12E
+#define CS37_SW4 0x12F
+#define CS38_SW4 0x130
+#define CS39_SW4 0x131
+
+#define CS31_SW5 0x132
+#define CS32_SW5 0x133
+#define CS33_SW5 0x134
+#define CS34_SW5 0x135
+#define CS35_SW5 0x136
+#define CS36_SW5 0x137
+#define CS37_SW5 0x138
+#define CS38_SW5 0x139
+#define CS39_SW5 0x13A
+
+#define CS31_SW6 0x13B
+#define CS32_SW6 0x13C
+#define CS33_SW6 0x13D
+#define CS34_SW6 0x13E
+#define CS35_SW6 0x13F
+#define CS36_SW6 0x140
+#define CS37_SW6 0x141
+#define CS38_SW6 0x142
+#define CS39_SW6 0x143
+
+#define CS31_SW7 0x144
+#define CS32_SW7 0x145
+#define CS33_SW7 0x146
+#define CS34_SW7 0x147
+#define CS35_SW7 0x148
+#define CS36_SW7 0x149
+#define CS37_SW7 0x14A
+#define CS38_SW7 0x14B
+#define CS39_SW7 0x14C
+
+#define CS31_SW8 0x14D
+#define CS32_SW8 0x14E
+#define CS33_SW8 0x14F
+#define CS34_SW8 0x150
+#define CS35_SW8 0x151
+#define CS36_SW8 0x152
+#define CS37_SW8 0x153
+#define CS38_SW8 0x154
+#define CS39_SW8 0x155
+
+#define CS31_SW9 0x156
+#define CS32_SW9 0x157
+#define CS33_SW9 0x158
+#define CS34_SW9 0x159
+#define CS35_SW9 0x15A
+#define CS36_SW9 0x15B
+#define CS37_SW9 0x15C
+#define CS38_SW9 0x15D
+#define CS39_SW9 0x15E
diff --git a/drivers/led/issi/is31fl3741-simple.c b/drivers/led/issi/is31fl3741-simple.c
deleted file mode 100644
index 3e9b3d8b25..0000000000
--- a/drivers/led/issi/is31fl3741-simple.c
+++ /dev/null
@@ -1,271 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2020 MelGeek
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "is31fl3741-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3741_PWM_REGISTER_COUNT 351
-#define IS31FL3741_SCALING_REGISTER_COUNT 351
-
-#ifndef IS31FL3741_I2C_TIMEOUT
-#    define IS31FL3741_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3741_I2C_PERSISTENCE
-#    define IS31FL3741_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3741_CONFIGURATION
-#    define IS31FL3741_CONFIGURATION 0x01
-#endif
-
-#ifndef IS31FL3741_PWM_FREQUENCY
-#    define IS31FL3741_PWM_FREQUENCY IS31FL3741_PWM_FREQUENCY_29K_HZ
-#endif
-
-#ifndef IS31FL3741_SW_PULLUP
-#    define IS31FL3741_SW_PULLUP IS31FL3741_PUR_32K_OHM
-#endif
-
-#ifndef IS31FL3741_CS_PULLDOWN
-#    define IS31FL3741_CS_PULLDOWN IS31FL3741_PDR_32K_OHM
-#endif
-
-#ifndef IS31FL3741_GLOBAL_CURRENT
-#    define IS31FL3741_GLOBAL_CURRENT 0xFF
-#endif
-
-uint8_t i2c_transfer_buffer[20] = {0xFF};
-
-// These buffers match the IS31FL3741 and IS31FL3741A PWM registers.
-// The scaling buffers match the page 2 and 3 LED On/Off registers.
-// Storing them like this is optimal for I2C transfers to the registers.
-// We could optimize this and take out the unused registers from these
-// buffers and the transfers in is31fl3741_write_pwm_buffer() but it's
-// probably not worth the extra complexity.
-uint8_t g_pwm_buffer[IS31FL3741_DRIVER_COUNT][IS31FL3741_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3741_DRIVER_COUNT]        = {false};
-bool    g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false};
-
-uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_SCALING_REGISTER_COUNT];
-
-void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3741_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3741_select_page(uint8_t addr, uint8_t page) {
-    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND_WRITE_LOCK, IS31FL3741_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3741_write_register(addr, IS31FL3741_REG_COMMAND, page);
-}
-
-bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assume page 0 is already selected
-
-    for (int i = 0; i < 342; i += 18) {
-        if (i == 180) {
-            is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_1);
-        }
-
-        i2c_transfer_buffer[0] = i % 180;
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 18);
-
-#if IS31FL3741_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) {
-                return false;
-            }
-        }
-#else
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) {
-            return false;
-        }
-#endif
-    }
-
-    // transfer the left cause the total number is 351
-    i2c_transfer_buffer[0] = 162;
-    memcpy(i2c_transfer_buffer + 1, pwm_buffer + 342, 9);
-
-#if IS31FL3741_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) {
-            return false;
-        }
-    }
-#else
-    if (i2c_transmit(addr << 1, i2c_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) {
-        return false;
-    }
-#endif
-
-    return true;
-}
-
-void is31fl3741_init_drivers(void) {
-    i2c_init();
-
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_1);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_2);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_3);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_init(IS31FL3741_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3741_LED_COUNT; i++) {
-        is31fl3741_set_led_control_register(i, true);
-    }
-
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_update_led_control_registers(IS31FL3741_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3741_init(uint8_t addr) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-    // Unlock the command register.
-
-    is31fl3741_select_page(addr, IS31FL3741_COMMAND_FUNCTION);
-
-    // Set to Normal operation
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_CONFIGURATION, IS31FL3741_CONFIGURATION);
-
-    // Set Golbal Current Control Register
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3741_GLOBAL_CURRENT);
-    // Set Pull up & Down for SWx CSy
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PULLDOWNUP, ((IS31FL3741_CS_PULLDOWN << 4) | IS31FL3741_SW_PULLUP));
-    // Set PWM frequency
-    is31fl3741_write_register(addr, IS31FL3741_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111));
-
-    // is31fl3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3741_set_value(int index, uint8_t value) {
-    is31fl3741_led_t led;
-    if (index >= 0 && index < IS31FL3741_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer_update_required[led.driver] = true;
-        g_pwm_buffer[led.driver][led.v]          = value;
-    }
-}
-
-void is31fl3741_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3741_LED_COUNT; i++) {
-        is31fl3741_set_value(i, value);
-    }
-}
-
-void is31fl3741_set_led_control_register(uint8_t index, bool value) {
-    is31fl3741_led_t led;
-    memcpy_P(&led, (&g_is31fl3741_leds[index]), sizeof(led));
-
-    if (value) {
-        g_scaling_registers[led.driver][led.v] = 0xFF;
-    } else {
-        g_scaling_registers[led.driver][led.v] = 0x00;
-    }
-
-    g_scaling_registers_update_required[led.driver] = true;
-}
-
-void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_PWM_0);
-
-        is31fl3741_write_pwm_buffer(addr, g_pwm_buffer[index]);
-    }
-
-    g_pwm_buffer_update_required[index] = false;
-}
-
-void is31fl3741_set_pwm_buffer(const is31fl3741_led_t *pled, uint8_t value) {
-    g_pwm_buffer[pled->driver][pled->v] = value;
-
-    g_pwm_buffer_update_required[pled->driver] = true;
-}
-
-void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_scaling_registers_update_required[index]) {
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_0);
-
-        // CS1_SW1 to CS30_SW6 are on page 2
-        for (int i = CS1_SW1; i <= CS30_SW6; ++i) {
-            is31fl3741_write_register(addr, i, g_scaling_registers[index][i]);
-        }
-
-        is31fl3741_select_page(addr, IS31FL3741_COMMAND_SCALING_1);
-
-        // CS1_SW7 to CS39_SW9 are on page 3
-        for (int i = CS1_SW7; i <= CS39_SW9; ++i) {
-            is31fl3741_write_register(addr, i - CS1_SW7, g_scaling_registers[index][i]);
-        }
-
-        g_scaling_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t value) {
-    g_scaling_registers[pled->driver][pled->v] = value;
-
-    g_scaling_registers_update_required[pled->driver] = true;
-}
-
-void is31fl3741_flush(void) {
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3741_I2C_ADDRESS_2)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3741_I2C_ADDRESS_3)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3741_I2C_ADDRESS_4)
-    is31fl3741_update_pwm_buffers(IS31FL3741_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3741-simple.h b/drivers/led/issi/is31fl3741-simple.h
deleted file mode 100644
index 462543a5bb..0000000000
--- a/drivers/led/issi/is31fl3741-simple.h
+++ /dev/null
@@ -1,517 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2020 MelGeek
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-// ======== DEPRECATED DEFINES - DO NOT USE ========
-#ifdef ISSI_TIMEOUT
-#    define IS31FL3741_I2C_TIMEOUT ISSI_TIMEOUT
-#endif
-#ifdef ISSI_PERSISTENCE
-#    define IS31FL3741_I2C_PERSISTENCE ISSI_PERSISTENCE
-#endif
-#ifdef ISSI_CONFIGURATION
-#    define IS31FL3741_CONFIGURATION ISSI_CONFIGURATION
-#endif
-#ifdef ISSI_SWPULLUP
-#    define IS31FL3741_SW_PULLUP ISSI_SWPULLUP
-#endif
-#ifdef ISSI_CSPULLUP
-#    define IS31FL3741_CS_PULLDOWN ISSI_CSPULLUP
-#endif
-#ifdef ISSI_GLOBALCURRENT
-#    define IS31FL3741_GLOBAL_CURRENT ISSI_GLOBALCURRENT
-#endif
-
-#define PUR_0R IS31FL3741_PUR_0_OHM
-#define PUR_05KR IS31FL3741_PUR_0K5_OHM
-#define PUR_1KR IS31FL3741_PUR_1K_OHM
-#define PUR_2KR IS31FL3741_PUR_2K_OHM
-#define PUR_4KR IS31FL3741_PUR_4K_OHM
-#define PUR_8KR IS31FL3741_PUR_8K_OHM
-#define PUR_16KR IS31FL3741_PUR_16K_OHM
-#define PUR_32KR IS31FL3741_PUR_32K_OHM
-// ========
-
-#define IS31FL3741_REG_INTERRUPT_MASK 0xF0
-#define IS31FL3741_REG_INTERRUPT_STATUS 0xF1
-#define IS31FL3741_REG_ID 0xFC
-
-#define IS31FL3741_REG_COMMAND 0xFD
-
-#define IS31FL3741_COMMAND_PWM_0 0x00
-#define IS31FL3741_COMMAND_PWM_1 0x01
-#define IS31FL3741_COMMAND_SCALING_0 0x02
-#define IS31FL3741_COMMAND_SCALING_1 0x03
-#define IS31FL3741_COMMAND_FUNCTION 0x04
-
-#define IS31FL3741_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3741_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3741_FUNCTION_REG_PULLDOWNUP 0x02
-#define IS31FL3741_FUNCTION_REG_PWM_FREQUENCY 0x36
-#define IS31FL3741_FUNCTION_REG_RESET 0x3F
-
-#define IS31FL3741_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3741_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3741_I2C_ADDRESS_GND 0x30
-#define IS31FL3741_I2C_ADDRESS_SCL 0x31
-#define IS31FL3741_I2C_ADDRESS_SDA 0x32
-#define IS31FL3741_I2C_ADDRESS_VCC 0x33
-
-#if defined(LED_MATRIX_IS31FL3741)
-#    define IS31FL3741_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3741_I2C_ADDRESS_4)
-#    define IS31FL3741_DRIVER_COUNT 4
-#elif defined(IS31FL3741_I2C_ADDRESS_3)
-#    define IS31FL3741_DRIVER_COUNT 3
-#elif defined(IS31FL3741_I2C_ADDRESS_2)
-#    define IS31FL3741_DRIVER_COUNT 2
-#elif defined(IS31FL3741_I2C_ADDRESS_1)
-#    define IS31FL3741_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3741_led_t {
-    uint8_t  driver : 2;
-    uint16_t v : 9;
-} PACKED is31fl3741_led_t;
-
-extern const is31fl3741_led_t PROGMEM g_is31fl3741_leds[IS31FL3741_LED_COUNT];
-
-void is31fl3741_init_drivers(void);
-void is31fl3741_init(uint8_t addr);
-void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3741_select_page(uint8_t addr, uint8_t page);
-bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3741_set_value(int index, uint8_t value);
-void is31fl3741_set_value_all(uint8_t value);
-
-void is31fl3741_set_led_control_register(uint8_t index, bool value);
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index);
-void is31fl3741_set_scaling_registers(const is31fl3741_led_t *pled, uint8_t value);
-
-void is31fl3741_set_pwm_buffer(const is31fl3741_led *pled, uint8_t value);
-
-void is31fl3741_flush(void);
-
-#define IS31FL3741_PDR_0_OHM 0b000   // No pull-down resistor
-#define IS31FL3741_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3741_PDR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3741_PDR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3741_PDR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3741_PDR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3741_PDR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3741_PDR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3741_PUR_0_OHM 0b000   // No pull-up resistor
-#define IS31FL3741_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3741_PUR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3741_PUR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3741_PUR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3741_PUR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3741_PUR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3741_PUR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3741_PWM_FREQUENCY_29K_HZ 0b0000
-#define IS31FL3741_PWM_FREQUENCY_3K6_HZ 0b0011
-#define IS31FL3741_PWM_FREQUENCY_1K8_HZ 0b0111
-#define IS31FL3741_PWM_FREQUENCY_900_HZ 0b1011
-
-#define CS1_SW1 0x00
-#define CS2_SW1 0x01
-#define CS3_SW1 0x02
-#define CS4_SW1 0x03
-#define CS5_SW1 0x04
-#define CS6_SW1 0x05
-#define CS7_SW1 0x06
-#define CS8_SW1 0x07
-#define CS9_SW1 0x08
-#define CS10_SW1 0x09
-#define CS11_SW1 0x0A
-#define CS12_SW1 0x0B
-#define CS13_SW1 0x0C
-#define CS14_SW1 0x0D
-#define CS15_SW1 0x0E
-#define CS16_SW1 0x0F
-#define CS17_SW1 0x10
-#define CS18_SW1 0x11
-#define CS19_SW1 0x12
-#define CS20_SW1 0x13
-#define CS21_SW1 0x14
-#define CS22_SW1 0x15
-#define CS23_SW1 0x16
-#define CS24_SW1 0x17
-#define CS25_SW1 0x18
-#define CS26_SW1 0x19
-#define CS27_SW1 0x1A
-#define CS28_SW1 0x1B
-#define CS29_SW1 0x1C
-#define CS30_SW1 0x1D
-
-#define CS1_SW2 0x1E
-#define CS2_SW2 0x1F
-#define CS3_SW2 0x20
-#define CS4_SW2 0x21
-#define CS5_SW2 0x22
-#define CS6_SW2 0x23
-#define CS7_SW2 0x24
-#define CS8_SW2 0x25
-#define CS9_SW2 0x26
-#define CS10_SW2 0x27
-#define CS11_SW2 0x28
-#define CS12_SW2 0x29
-#define CS13_SW2 0x2A
-#define CS14_SW2 0x2B
-#define CS15_SW2 0x2C
-#define CS16_SW2 0x2D
-#define CS17_SW2 0x2E
-#define CS18_SW2 0x2F
-#define CS19_SW2 0x30
-#define CS20_SW2 0x31
-#define CS21_SW2 0x32
-#define CS22_SW2 0x33
-#define CS23_SW2 0x34
-#define CS24_SW2 0x35
-#define CS25_SW2 0x36
-#define CS26_SW2 0x37
-#define CS27_SW2 0x38
-#define CS28_SW2 0x39
-#define CS29_SW2 0x3A
-#define CS30_SW2 0x3B
-
-#define CS1_SW3 0x3C
-#define CS2_SW3 0x3D
-#define CS3_SW3 0x3E
-#define CS4_SW3 0x3F
-#define CS5_SW3 0x40
-#define CS6_SW3 0x41
-#define CS7_SW3 0x42
-#define CS8_SW3 0x43
-#define CS9_SW3 0x44
-#define CS10_SW3 0x45
-#define CS11_SW3 0x46
-#define CS12_SW3 0x47
-#define CS13_SW3 0x48
-#define CS14_SW3 0x49
-#define CS15_SW3 0x4A
-#define CS16_SW3 0x4B
-#define CS17_SW3 0x4C
-#define CS18_SW3 0x4D
-#define CS19_SW3 0x4E
-#define CS20_SW3 0x4F
-#define CS21_SW3 0x50
-#define CS22_SW3 0x51
-#define CS23_SW3 0x52
-#define CS24_SW3 0x53
-#define CS25_SW3 0x54
-#define CS26_SW3 0x55
-#define CS27_SW3 0x56
-#define CS28_SW3 0x57
-#define CS29_SW3 0x58
-#define CS30_SW3 0x59
-
-#define CS1_SW4 0x5A
-#define CS2_SW4 0x5B
-#define CS3_SW4 0x5C
-#define CS4_SW4 0x5D
-#define CS5_SW4 0x5E
-#define CS6_SW4 0x5F
-#define CS7_SW4 0x60
-#define CS8_SW4 0x61
-#define CS9_SW4 0x62
-#define CS10_SW4 0x63
-#define CS11_SW4 0x64
-#define CS12_SW4 0x65
-#define CS13_SW4 0x66
-#define CS14_SW4 0x67
-#define CS15_SW4 0x68
-#define CS16_SW4 0x69
-#define CS17_SW4 0x6A
-#define CS18_SW4 0x6B
-#define CS19_SW4 0x6C
-#define CS20_SW4 0x6D
-#define CS21_SW4 0x6E
-#define CS22_SW4 0x6F
-#define CS23_SW4 0x70
-#define CS24_SW4 0x71
-#define CS25_SW4 0x72
-#define CS26_SW4 0x73
-#define CS27_SW4 0x74
-#define CS28_SW4 0x75
-#define CS29_SW4 0x76
-#define CS30_SW4 0x77
-
-#define CS1_SW5 0x78
-#define CS2_SW5 0x79
-#define CS3_SW5 0x7A
-#define CS4_SW5 0x7B
-#define CS5_SW5 0x7C
-#define CS6_SW5 0x7D
-#define CS7_SW5 0x7E
-#define CS8_SW5 0x7F
-#define CS9_SW5 0x80
-#define CS10_SW5 0x81
-#define CS11_SW5 0x82
-#define CS12_SW5 0x83
-#define CS13_SW5 0x84
-#define CS14_SW5 0x85
-#define CS15_SW5 0x86
-#define CS16_SW5 0x87
-#define CS17_SW5 0x88
-#define CS18_SW5 0x89
-#define CS19_SW5 0x8A
-#define CS20_SW5 0x8B
-#define CS21_SW5 0x8C
-#define CS22_SW5 0x8D
-#define CS23_SW5 0x8E
-#define CS24_SW5 0x8F
-#define CS25_SW5 0x90
-#define CS26_SW5 0x91
-#define CS27_SW5 0x92
-#define CS28_SW5 0x93
-#define CS29_SW5 0x94
-#define CS30_SW5 0x95
-
-#define CS1_SW6 0x96
-#define CS2_SW6 0x97
-#define CS3_SW6 0x98
-#define CS4_SW6 0x99
-#define CS5_SW6 0x9A
-#define CS6_SW6 0x9B
-#define CS7_SW6 0x9C
-#define CS8_SW6 0x9D
-#define CS9_SW6 0x9E
-#define CS10_SW6 0x9F
-#define CS11_SW6 0xA0
-#define CS12_SW6 0xA1
-#define CS13_SW6 0xA2
-#define CS14_SW6 0xA3
-#define CS15_SW6 0xA4
-#define CS16_SW6 0xA5
-#define CS17_SW6 0xA6
-#define CS18_SW6 0xA7
-#define CS19_SW6 0xA8
-#define CS20_SW6 0xA9
-#define CS21_SW6 0xAA
-#define CS22_SW6 0xAB
-#define CS23_SW6 0xAC
-#define CS24_SW6 0xAD
-#define CS25_SW6 0xAE
-#define CS26_SW6 0xAF
-#define CS27_SW6 0xB0
-#define CS28_SW6 0xB1
-#define CS29_SW6 0xB2
-#define CS30_SW6 0xB3
-
-#define CS1_SW7 0xB4
-#define CS2_SW7 0xB5
-#define CS3_SW7 0xB6
-#define CS4_SW7 0xB7
-#define CS5_SW7 0xB8
-#define CS6_SW7 0xB9
-#define CS7_SW7 0xBA
-#define CS8_SW7 0xBB
-#define CS9_SW7 0xBC
-#define CS10_SW7 0xBD
-#define CS11_SW7 0xBE
-#define CS12_SW7 0xBF
-#define CS13_SW7 0xC0
-#define CS14_SW7 0xC1
-#define CS15_SW7 0xC2
-#define CS16_SW7 0xC3
-#define CS17_SW7 0xC4
-#define CS18_SW7 0xC5
-#define CS19_SW7 0xC6
-#define CS20_SW7 0xC7
-#define CS21_SW7 0xC8
-#define CS22_SW7 0xC9
-#define CS23_SW7 0xCA
-#define CS24_SW7 0xCB
-#define CS25_SW7 0xCC
-#define CS26_SW7 0xCD
-#define CS27_SW7 0xCE
-#define CS28_SW7 0xCF
-#define CS29_SW7 0xD0
-#define CS30_SW7 0xD1
-
-#define CS1_SW8 0xD2
-#define CS2_SW8 0xD3
-#define CS3_SW8 0xD4
-#define CS4_SW8 0xD5
-#define CS5_SW8 0xD6
-#define CS6_SW8 0xD7
-#define CS7_SW8 0xD8
-#define CS8_SW8 0xD9
-#define CS9_SW8 0xDA
-#define CS10_SW8 0xDB
-#define CS11_SW8 0xDC
-#define CS12_SW8 0xDD
-#define CS13_SW8 0xDE
-#define CS14_SW8 0xDF
-#define CS15_SW8 0xE0
-#define CS16_SW8 0xE1
-#define CS17_SW8 0xE2
-#define CS18_SW8 0xE3
-#define CS19_SW8 0xE4
-#define CS20_SW8 0xE5
-#define CS21_SW8 0xE6
-#define CS22_SW8 0xE7
-#define CS23_SW8 0xE8
-#define CS24_SW8 0xE9
-#define CS25_SW8 0xEA
-#define CS26_SW8 0xEB
-#define CS27_SW8 0xEC
-#define CS28_SW8 0xED
-#define CS29_SW8 0xEE
-#define CS30_SW8 0xEF
-
-#define CS1_SW9 0xF0
-#define CS2_SW9 0xF1
-#define CS3_SW9 0xF2
-#define CS4_SW9 0xF3
-#define CS5_SW9 0xF4
-#define CS6_SW9 0xF5
-#define CS7_SW9 0xF6
-#define CS8_SW9 0xF7
-#define CS9_SW9 0xF8
-#define CS10_SW9 0xF9
-#define CS11_SW9 0xFA
-#define CS12_SW9 0xFB
-#define CS13_SW9 0xFC
-#define CS14_SW9 0xFD
-#define CS15_SW9 0xFE
-#define CS16_SW9 0xFF
-#define CS17_SW9 0x100
-#define CS18_SW9 0x101
-#define CS19_SW9 0x102
-#define CS20_SW9 0x103
-#define CS21_SW9 0x104
-#define CS22_SW9 0x105
-#define CS23_SW9 0x106
-#define CS24_SW9 0x107
-#define CS25_SW9 0x108
-#define CS26_SW9 0x109
-#define CS27_SW9 0x10A
-#define CS28_SW9 0x10B
-#define CS29_SW9 0x10C
-#define CS30_SW9 0x10D
-
-#define CS31_SW1 0x10E
-#define CS32_SW1 0x10F
-#define CS33_SW1 0x110
-#define CS34_SW1 0x111
-#define CS35_SW1 0x112
-#define CS36_SW1 0x113
-#define CS37_SW1 0x114
-#define CS38_SW1 0x115
-#define CS39_SW1 0x116
-
-#define CS31_SW2 0x117
-#define CS32_SW2 0x118
-#define CS33_SW2 0x119
-#define CS34_SW2 0x11A
-#define CS35_SW2 0x11B
-#define CS36_SW2 0x11C
-#define CS37_SW2 0x11D
-#define CS38_SW2 0x11E
-#define CS39_SW2 0x11F
-
-#define CS31_SW3 0x120
-#define CS32_SW3 0x121
-#define CS33_SW3 0x122
-#define CS34_SW3 0x123
-#define CS35_SW3 0x124
-#define CS36_SW3 0x125
-#define CS37_SW3 0x126
-#define CS38_SW3 0x127
-#define CS39_SW3 0x128
-
-#define CS31_SW4 0x129
-#define CS32_SW4 0x12A
-#define CS33_SW4 0x12B
-#define CS34_SW4 0x12C
-#define CS35_SW4 0x12D
-#define CS36_SW4 0x12E
-#define CS37_SW4 0x12F
-#define CS38_SW4 0x130
-#define CS39_SW4 0x131
-
-#define CS31_SW5 0x132
-#define CS32_SW5 0x133
-#define CS33_SW5 0x134
-#define CS34_SW5 0x135
-#define CS35_SW5 0x136
-#define CS36_SW5 0x137
-#define CS37_SW5 0x138
-#define CS38_SW5 0x139
-#define CS39_SW5 0x13A
-
-#define CS31_SW6 0x13B
-#define CS32_SW6 0x13C
-#define CS33_SW6 0x13D
-#define CS34_SW6 0x13E
-#define CS35_SW6 0x13F
-#define CS36_SW6 0x140
-#define CS37_SW6 0x141
-#define CS38_SW6 0x142
-#define CS39_SW6 0x143
-
-#define CS31_SW7 0x144
-#define CS32_SW7 0x145
-#define CS33_SW7 0x146
-#define CS34_SW7 0x147
-#define CS35_SW7 0x148
-#define CS36_SW7 0x149
-#define CS37_SW7 0x14A
-#define CS38_SW7 0x14B
-#define CS39_SW7 0x14C
-
-#define CS31_SW8 0x14D
-#define CS32_SW8 0x14E
-#define CS33_SW8 0x14F
-#define CS34_SW8 0x150
-#define CS35_SW8 0x151
-#define CS36_SW8 0x152
-#define CS37_SW8 0x153
-#define CS38_SW8 0x154
-#define CS39_SW8 0x155
-
-#define CS31_SW9 0x156
-#define CS32_SW9 0x157
-#define CS33_SW9 0x158
-#define CS34_SW9 0x159
-#define CS35_SW9 0x15A
-#define CS36_SW9 0x15B
-#define CS37_SW9 0x15C
-#define CS38_SW9 0x15D
-#define CS39_SW9 0x15E
diff --git a/drivers/led/issi/is31fl3742a-mono.c b/drivers/led/issi/is31fl3742a-mono.c
new file mode 100644
index 0000000000..7d9095429d
--- /dev/null
+++ b/drivers/led/issi/is31fl3742a-mono.c
@@ -0,0 +1,206 @@
+#include "is31fl3742a-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3742A_PWM_REGISTER_COUNT 180
+#define IS31FL3742A_SCALING_REGISTER_COUNT 180
+
+#ifndef IS31FL3742A_I2C_TIMEOUT
+#    define IS31FL3742A_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3742A_I2C_PERSISTENCE
+#    define IS31FL3742A_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3742A_CONFIGURATION
+#    define IS31FL3742A_CONFIGURATION 0x31
+#endif
+
+#ifndef IS31FL3742A_PWM_FREQUENCY
+#    define IS31FL3742A_PWM_FREQUENCY IS31FL3742A_PWM_FREQUENCY_29K_HZ
+#endif
+
+#ifndef IS31FL3742A_SW_PULLDOWN
+#    define IS31FL3742A_SW_PULLDOWN IS31FL3742A_PDR_8K_OHM
+#endif
+
+#ifndef IS31FL3742A_CS_PULLUP
+#    define IS31FL3742A_CS_PULLUP IS31FL3742A_PUR_8K_OHM
+#endif
+
+#ifndef IS31FL3742A_GLOBAL_CURRENT
+#    define IS31FL3742A_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT];
+
+void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3742A_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3742a_select_page(uint8_t addr, uint8_t page) {
+    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND, page);
+}
+
+void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3742A_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3742a_init_drivers(void) {
+    i2c_init();
+
+    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_1);
+#if defined(IS31FL3742A_I2C_ADDRESS_2)
+    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_2);
+#    if defined(IS31FL3742A_I2C_ADDRESS_3)
+    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_3);
+#        if defined(IS31FL3742A_I2C_ADDRESS_4)
+    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
+        is31fl3742a_set_scaling_register(i, 0xFF);
+    }
+
+    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3742A_I2C_ADDRESS_2)
+    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3742A_I2C_ADDRESS_3)
+    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3742A_I2C_ADDRESS_4)
+    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3742a_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
+        is31fl3742a_write_register(addr, i, 0x00);
+    }
+
+    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) {
+        is31fl3742a_write_register(addr, i, 0x00);
+    }
+
+    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_FUNCTION);
+
+    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP);
+    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT);
+    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111));
+    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3742a_set_value(int index, uint8_t value) {
+    is31fl3742a_led_t led;
+    if (index >= 0 && index < IS31FL3742A_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void is31fl3742a_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
+        is31fl3742a_set_value(i, value);
+    }
+}
+
+void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value) {
+    is31fl3742a_led_t led;
+    memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.v] = value;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
+
+        is31fl3742a_write_pwm_buffer(addr, g_pwm_buffer[index]);
+        g_pwm_buffer_update_required[index] = false;
+    }
+}
+
+void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
+            is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3742a_flush(void) {
+    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3742A_I2C_ADDRESS_2)
+    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3742A_I2C_ADDRESS_3)
+    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3742A_I2C_ADDRESS_4)
+    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3742a-mono.h b/drivers/led/issi/is31fl3742a-mono.h
new file mode 100644
index 0000000000..04614e4f6e
--- /dev/null
+++ b/drivers/led/issi/is31fl3742a-mono.h
@@ -0,0 +1,297 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+#define IS31FL3742A_REG_INTERRUPT_MASK 0xF0
+#define IS31FL3742A_REG_INTERRUPT_STATUS 0xF1
+#define IS31FL3742A_REG_ID 0xFC
+
+#define IS31FL3742A_REG_COMMAND 0xFD
+
+#define IS31FL3742A_COMMAND_PWM 0x00
+#define IS31FL3742A_COMMAND_SCALING 0x02
+#define IS31FL3742A_COMMAND_FUNCTION 0x04
+
+#define IS31FL3742A_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3742A_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY 0x36
+#define IS31FL3742A_FUNCTION_REG_RESET 0x3F
+#define IS31FL3742A_FUNCTION_REG_SPREAD_SPECTRUM 0x41
+
+#define IS31FL3742A_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3742A_I2C_ADDRESS_GND 0x30
+#define IS31FL3742A_I2C_ADDRESS_SCL 0x31
+#define IS31FL3742A_I2C_ADDRESS_SDA 0x32
+#define IS31FL3742A_I2C_ADDRESS_VCC 0x33
+
+#if defined(LED_MATRIX_IS31FL3742A)
+#    define IS31FL3742A_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3742A_I2C_ADDRESS_4)
+#    define IS31FL3742A_DRIVER_COUNT 4
+#elif defined(IS31FL3742A_I2C_ADDRESS_3)
+#    define IS31FL3742A_DRIVER_COUNT 3
+#elif defined(IS31FL3742A_I2C_ADDRESS_2)
+#    define IS31FL3742A_DRIVER_COUNT 2
+#elif defined(IS31FL3742A_I2C_ADDRESS_1)
+#    define IS31FL3742A_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3742a_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3742a_led_t;
+
+extern const is31fl3742a_led_t PROGMEM g_is31fl3742a_leds[IS31FL3742A_LED_COUNT];
+
+void is31fl3742a_init_drivers(void);
+void is31fl3742a_init(uint8_t addr);
+void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3742a_select_page(uint8_t addr, uint8_t page);
+void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3742a_set_value(int index, uint8_t value);
+void is31fl3742a_set_value_all(uint8_t value);
+
+void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value);
+
+void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index);
+
+void is31fl3742a_flush(void);
+
+#define IS31FL3742A_PDR_0_OHM 0b000   // No pull-down resistor
+#define IS31FL3742A_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3742A_PDR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3742A_PDR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3742A_PDR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3742A_PDR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3742A_PDR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3742A_PDR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3742A_PUR_0_OHM 0b000   // No pull-up resistor
+#define IS31FL3742A_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
+#define IS31FL3742A_PUR_1K_OHM 0b010  // 1 kOhm resistor
+#define IS31FL3742A_PUR_2K_OHM 0b011  // 2 kOhm resistor
+#define IS31FL3742A_PUR_4K_OHM 0b100  // 4 kOhm resistor
+#define IS31FL3742A_PUR_8K_OHM 0b101  // 8 kOhm resistor
+#define IS31FL3742A_PUR_16K_OHM 0b110 // 16 kOhm resistor
+#define IS31FL3742A_PUR_32K_OHM 0b111 // 32 kOhm resistor
+
+#define IS31FL3742A_PWM_FREQUENCY_29K_HZ 0b0000
+#define IS31FL3742A_PWM_FREQUENCY_3K6_HZ 0b0011
+#define IS31FL3742A_PWM_FREQUENCY_1K8_HZ 0b0111
+#define IS31FL3742A_PWM_FREQUENCY_900_HZ 0b1011
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+#define CS19_SW1 0x12
+#define CS20_SW1 0x13
+#define CS21_SW1 0x14
+#define CS22_SW1 0x15
+#define CS23_SW1 0x16
+#define CS24_SW1 0x17
+#define CS25_SW1 0x18
+#define CS26_SW1 0x19
+#define CS27_SW1 0x1A
+#define CS28_SW1 0x1B
+#define CS29_SW1 0x1C
+#define CS30_SW1 0x1D
+
+#define CS1_SW2 0x1E
+#define CS2_SW2 0x1F
+#define CS3_SW2 0x20
+#define CS4_SW2 0x21
+#define CS5_SW2 0x22
+#define CS6_SW2 0x23
+#define CS7_SW2 0x24
+#define CS8_SW2 0x25
+#define CS9_SW2 0x26
+#define CS10_SW2 0x27
+#define CS11_SW2 0x28
+#define CS12_SW2 0x29
+#define CS13_SW2 0x2A
+#define CS14_SW2 0x2B
+#define CS15_SW2 0x2C
+#define CS16_SW2 0x2D
+#define CS17_SW2 0x2E
+#define CS18_SW2 0x2F
+#define CS19_SW2 0x30
+#define CS20_SW2 0x31
+#define CS21_SW2 0x32
+#define CS22_SW2 0x33
+#define CS23_SW2 0x34
+#define CS24_SW2 0x35
+#define CS25_SW2 0x36
+#define CS26_SW2 0x37
+#define CS27_SW2 0x38
+#define CS28_SW2 0x39
+#define CS29_SW2 0x3A
+#define CS30_SW2 0x3B
+
+#define CS1_SW3 0x3C
+#define CS2_SW3 0x3D
+#define CS3_SW3 0x3E
+#define CS4_SW3 0x3F
+#define CS5_SW3 0x40
+#define CS6_SW3 0x41
+#define CS7_SW3 0x42
+#define CS8_SW3 0x43
+#define CS9_SW3 0x44
+#define CS10_SW3 0x45
+#define CS11_SW3 0x46
+#define CS12_SW3 0x47
+#define CS13_SW3 0x48
+#define CS14_SW3 0x49
+#define CS15_SW3 0x4A
+#define CS16_SW3 0x4B
+#define CS17_SW3 0x4C
+#define CS18_SW3 0x4D
+#define CS19_SW3 0x4E
+#define CS20_SW3 0x4F
+#define CS21_SW3 0x50
+#define CS22_SW3 0x51
+#define CS23_SW3 0x52
+#define CS24_SW3 0x53
+#define CS25_SW3 0x54
+#define CS26_SW3 0x55
+#define CS27_SW3 0x56
+#define CS28_SW3 0x57
+#define CS29_SW3 0x58
+#define CS30_SW3 0x59
+
+#define CS1_SW4 0x5A
+#define CS2_SW4 0x5B
+#define CS3_SW4 0x5C
+#define CS4_SW4 0x5D
+#define CS5_SW4 0x5E
+#define CS6_SW4 0x5F
+#define CS7_SW4 0x60
+#define CS8_SW4 0x61
+#define CS9_SW4 0x62
+#define CS10_SW4 0x63
+#define CS11_SW4 0x64
+#define CS12_SW4 0x65
+#define CS13_SW4 0x66
+#define CS14_SW4 0x67
+#define CS15_SW4 0x68
+#define CS16_SW4 0x69
+#define CS17_SW4 0x6A
+#define CS18_SW4 0x6B
+#define CS19_SW4 0x6C
+#define CS20_SW4 0x6D
+#define CS21_SW4 0x6E
+#define CS22_SW4 0x6F
+#define CS23_SW4 0x70
+#define CS24_SW4 0x71
+#define CS25_SW4 0x72
+#define CS26_SW4 0x73
+#define CS27_SW4 0x74
+#define CS28_SW4 0x75
+#define CS29_SW4 0x76
+#define CS30_SW4 0x77
+
+#define CS1_SW5 0x78
+#define CS2_SW5 0x79
+#define CS3_SW5 0x7A
+#define CS4_SW5 0x7B
+#define CS5_SW5 0x7C
+#define CS6_SW5 0x7D
+#define CS7_SW5 0x7E
+#define CS8_SW5 0x7F
+#define CS9_SW5 0x80
+#define CS10_SW5 0x81
+#define CS11_SW5 0x82
+#define CS12_SW5 0x83
+#define CS13_SW5 0x84
+#define CS14_SW5 0x85
+#define CS15_SW5 0x86
+#define CS16_SW5 0x87
+#define CS17_SW5 0x88
+#define CS18_SW5 0x89
+#define CS19_SW5 0x8A
+#define CS20_SW5 0x8B
+#define CS21_SW5 0x8C
+#define CS22_SW5 0x8D
+#define CS23_SW5 0x8E
+#define CS24_SW5 0x8F
+#define CS25_SW5 0x90
+#define CS26_SW5 0x91
+#define CS27_SW5 0x92
+#define CS28_SW5 0x93
+#define CS29_SW5 0x94
+#define CS30_SW5 0x95
+
+#define CS1_SW6 0x96
+#define CS2_SW6 0x97
+#define CS3_SW6 0x98
+#define CS4_SW6 0x99
+#define CS5_SW6 0x9A
+#define CS6_SW6 0x9B
+#define CS7_SW6 0x9C
+#define CS8_SW6 0x9D
+#define CS9_SW6 0x9E
+#define CS10_SW6 0x9F
+#define CS11_SW6 0xA0
+#define CS12_SW6 0xA1
+#define CS13_SW6 0xA2
+#define CS14_SW6 0xA3
+#define CS15_SW6 0xA4
+#define CS16_SW6 0xA5
+#define CS17_SW6 0xA6
+#define CS18_SW6 0xA7
+#define CS19_SW6 0xA8
+#define CS20_SW6 0xA9
+#define CS21_SW6 0xAA
+#define CS22_SW6 0xAB
+#define CS23_SW6 0xAC
+#define CS24_SW6 0xAD
+#define CS25_SW6 0xAE
+#define CS26_SW6 0xAF
+#define CS27_SW6 0xB0
+#define CS28_SW6 0xB1
+#define CS29_SW6 0xB2
+#define CS30_SW6 0xB3
diff --git a/drivers/led/issi/is31fl3742a-simple.c b/drivers/led/issi/is31fl3742a-simple.c
deleted file mode 100644
index ee6e8741b9..0000000000
--- a/drivers/led/issi/is31fl3742a-simple.c
+++ /dev/null
@@ -1,206 +0,0 @@
-#include "is31fl3742a-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3742A_PWM_REGISTER_COUNT 180
-#define IS31FL3742A_SCALING_REGISTER_COUNT 180
-
-#ifndef IS31FL3742A_I2C_TIMEOUT
-#    define IS31FL3742A_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3742A_I2C_PERSISTENCE
-#    define IS31FL3742A_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3742A_CONFIGURATION
-#    define IS31FL3742A_CONFIGURATION 0x31
-#endif
-
-#ifndef IS31FL3742A_PWM_FREQUENCY
-#    define IS31FL3742A_PWM_FREQUENCY IS31FL3742A_PWM_FREQUENCY_29K_HZ
-#endif
-
-#ifndef IS31FL3742A_SW_PULLDOWN
-#    define IS31FL3742A_SW_PULLDOWN IS31FL3742A_PDR_8K_OHM
-#endif
-
-#ifndef IS31FL3742A_CS_PULLUP
-#    define IS31FL3742A_CS_PULLUP IS31FL3742A_PUR_8K_OHM
-#endif
-
-#ifndef IS31FL3742A_GLOBAL_CURRENT
-#    define IS31FL3742A_GLOBAL_CURRENT 0xFF
-#endif
-
-uint8_t i2c_transfer_buffer[20] = {0xFF};
-
-uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT]        = {false};
-bool    g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false};
-
-uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT];
-
-void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3742A_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3742A_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3742a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3742a_write_register(addr, IS31FL3742A_REG_COMMAND, page);
-}
-
-void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assumes page 0 is already selected.
-    // If any of the transactions fails function returns false.
-    // Transmit PWM registers in 12 transfers of 16 bytes.
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // Iterate over the pwm_buffer contents at 16 byte intervals.
-    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i;
-        // Copy the data from i to i+15.
-        // Device will auto-increment register for data after the first byte
-        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3742A_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT) != 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3742A_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3742a_init_drivers(void) {
-    i2c_init();
-
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_1);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_2);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_3);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_init(IS31FL3742A_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
-        is31fl3742a_set_scaling_register(i, 0xFF);
-    }
-
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_update_scaling_registers(IS31FL3742A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3742a_init(uint8_t addr) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3742a_write_register(addr, i, 0x00);
-    }
-
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
-
-    for (int i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) {
-        is31fl3742a_write_register(addr, i, 0x00);
-    }
-
-    is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_FUNCTION);
-
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP);
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT);
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111));
-    is31fl3742a_write_register(addr, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3742a_set_value(int index, uint8_t value) {
-    is31fl3742a_led_t led;
-    if (index >= 0 && index < IS31FL3742A_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer[led.driver][led.v]          = value;
-        g_pwm_buffer_update_required[led.driver] = true;
-    }
-}
-
-void is31fl3742a_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) {
-        is31fl3742a_set_value(i, value);
-    }
-}
-
-void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value) {
-    is31fl3742a_led_t led;
-    memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led));
-
-    g_scaling_registers[led.driver][led.v] = value;
-
-    g_scaling_registers_update_required[led.driver] = true;
-}
-
-void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_PWM);
-
-        is31fl3742a_write_pwm_buffer(addr, g_pwm_buffer[index]);
-        g_pwm_buffer_update_required[index] = false;
-    }
-}
-
-void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index) {
-    if (g_scaling_registers_update_required[index]) {
-        is31fl3742a_select_page(addr, IS31FL3742A_COMMAND_SCALING);
-
-        for (int i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3742a_write_register(addr, i, g_scaling_registers[index][i]);
-        }
-        g_scaling_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3742a_flush(void) {
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3742A_I2C_ADDRESS_2)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3742A_I2C_ADDRESS_3)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3742A_I2C_ADDRESS_4)
-    is31fl3742a_update_pwm_buffers(IS31FL3742A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3742a-simple.h b/drivers/led/issi/is31fl3742a-simple.h
deleted file mode 100644
index 04614e4f6e..0000000000
--- a/drivers/led/issi/is31fl3742a-simple.h
+++ /dev/null
@@ -1,297 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2020 MelGeek
- * Copyright 2021 MasterSpoon
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-#define IS31FL3742A_REG_INTERRUPT_MASK 0xF0
-#define IS31FL3742A_REG_INTERRUPT_STATUS 0xF1
-#define IS31FL3742A_REG_ID 0xFC
-
-#define IS31FL3742A_REG_COMMAND 0xFD
-
-#define IS31FL3742A_COMMAND_PWM 0x00
-#define IS31FL3742A_COMMAND_SCALING 0x02
-#define IS31FL3742A_COMMAND_FUNCTION 0x04
-
-#define IS31FL3742A_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3742A_FUNCTION_REG_PULLDOWNUP 0x02
-#define IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY 0x36
-#define IS31FL3742A_FUNCTION_REG_RESET 0x3F
-#define IS31FL3742A_FUNCTION_REG_SPREAD_SPECTRUM 0x41
-
-#define IS31FL3742A_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3742A_I2C_ADDRESS_GND 0x30
-#define IS31FL3742A_I2C_ADDRESS_SCL 0x31
-#define IS31FL3742A_I2C_ADDRESS_SDA 0x32
-#define IS31FL3742A_I2C_ADDRESS_VCC 0x33
-
-#if defined(LED_MATRIX_IS31FL3742A)
-#    define IS31FL3742A_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3742A_I2C_ADDRESS_4)
-#    define IS31FL3742A_DRIVER_COUNT 4
-#elif defined(IS31FL3742A_I2C_ADDRESS_3)
-#    define IS31FL3742A_DRIVER_COUNT 3
-#elif defined(IS31FL3742A_I2C_ADDRESS_2)
-#    define IS31FL3742A_DRIVER_COUNT 2
-#elif defined(IS31FL3742A_I2C_ADDRESS_1)
-#    define IS31FL3742A_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3742a_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3742a_led_t;
-
-extern const is31fl3742a_led_t PROGMEM g_is31fl3742a_leds[IS31FL3742A_LED_COUNT];
-
-void is31fl3742a_init_drivers(void);
-void is31fl3742a_init(uint8_t addr);
-void is31fl3742a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3742a_select_page(uint8_t addr, uint8_t page);
-void is31fl3742a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3742a_set_value(int index, uint8_t value);
-void is31fl3742a_set_value_all(uint8_t value);
-
-void is31fl3742a_set_scaling_register(uint8_t index, uint8_t value);
-
-void is31fl3742a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3742a_update_scaling_registers(uint8_t addr, uint8_t index);
-
-void is31fl3742a_flush(void);
-
-#define IS31FL3742A_PDR_0_OHM 0b000   // No pull-down resistor
-#define IS31FL3742A_PDR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3742A_PDR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3742A_PDR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3742A_PDR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3742A_PDR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3742A_PDR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3742A_PDR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3742A_PUR_0_OHM 0b000   // No pull-up resistor
-#define IS31FL3742A_PUR_0K5_OHM 0b001 // 0.5 kOhm resistor
-#define IS31FL3742A_PUR_1K_OHM 0b010  // 1 kOhm resistor
-#define IS31FL3742A_PUR_2K_OHM 0b011  // 2 kOhm resistor
-#define IS31FL3742A_PUR_4K_OHM 0b100  // 4 kOhm resistor
-#define IS31FL3742A_PUR_8K_OHM 0b101  // 8 kOhm resistor
-#define IS31FL3742A_PUR_16K_OHM 0b110 // 16 kOhm resistor
-#define IS31FL3742A_PUR_32K_OHM 0b111 // 32 kOhm resistor
-
-#define IS31FL3742A_PWM_FREQUENCY_29K_HZ 0b0000
-#define IS31FL3742A_PWM_FREQUENCY_3K6_HZ 0b0011
-#define IS31FL3742A_PWM_FREQUENCY_1K8_HZ 0b0111
-#define IS31FL3742A_PWM_FREQUENCY_900_HZ 0b1011
-
-#define CS1_SW1 0x00
-#define CS2_SW1 0x01
-#define CS3_SW1 0x02
-#define CS4_SW1 0x03
-#define CS5_SW1 0x04
-#define CS6_SW1 0x05
-#define CS7_SW1 0x06
-#define CS8_SW1 0x07
-#define CS9_SW1 0x08
-#define CS10_SW1 0x09
-#define CS11_SW1 0x0A
-#define CS12_SW1 0x0B
-#define CS13_SW1 0x0C
-#define CS14_SW1 0x0D
-#define CS15_SW1 0x0E
-#define CS16_SW1 0x0F
-#define CS17_SW1 0x10
-#define CS18_SW1 0x11
-#define CS19_SW1 0x12
-#define CS20_SW1 0x13
-#define CS21_SW1 0x14
-#define CS22_SW1 0x15
-#define CS23_SW1 0x16
-#define CS24_SW1 0x17
-#define CS25_SW1 0x18
-#define CS26_SW1 0x19
-#define CS27_SW1 0x1A
-#define CS28_SW1 0x1B
-#define CS29_SW1 0x1C
-#define CS30_SW1 0x1D
-
-#define CS1_SW2 0x1E
-#define CS2_SW2 0x1F
-#define CS3_SW2 0x20
-#define CS4_SW2 0x21
-#define CS5_SW2 0x22
-#define CS6_SW2 0x23
-#define CS7_SW2 0x24
-#define CS8_SW2 0x25
-#define CS9_SW2 0x26
-#define CS10_SW2 0x27
-#define CS11_SW2 0x28
-#define CS12_SW2 0x29
-#define CS13_SW2 0x2A
-#define CS14_SW2 0x2B
-#define CS15_SW2 0x2C
-#define CS16_SW2 0x2D
-#define CS17_SW2 0x2E
-#define CS18_SW2 0x2F
-#define CS19_SW2 0x30
-#define CS20_SW2 0x31
-#define CS21_SW2 0x32
-#define CS22_SW2 0x33
-#define CS23_SW2 0x34
-#define CS24_SW2 0x35
-#define CS25_SW2 0x36
-#define CS26_SW2 0x37
-#define CS27_SW2 0x38
-#define CS28_SW2 0x39
-#define CS29_SW2 0x3A
-#define CS30_SW2 0x3B
-
-#define CS1_SW3 0x3C
-#define CS2_SW3 0x3D
-#define CS3_SW3 0x3E
-#define CS4_SW3 0x3F
-#define CS5_SW3 0x40
-#define CS6_SW3 0x41
-#define CS7_SW3 0x42
-#define CS8_SW3 0x43
-#define CS9_SW3 0x44
-#define CS10_SW3 0x45
-#define CS11_SW3 0x46
-#define CS12_SW3 0x47
-#define CS13_SW3 0x48
-#define CS14_SW3 0x49
-#define CS15_SW3 0x4A
-#define CS16_SW3 0x4B
-#define CS17_SW3 0x4C
-#define CS18_SW3 0x4D
-#define CS19_SW3 0x4E
-#define CS20_SW3 0x4F
-#define CS21_SW3 0x50
-#define CS22_SW3 0x51
-#define CS23_SW3 0x52
-#define CS24_SW3 0x53
-#define CS25_SW3 0x54
-#define CS26_SW3 0x55
-#define CS27_SW3 0x56
-#define CS28_SW3 0x57
-#define CS29_SW3 0x58
-#define CS30_SW3 0x59
-
-#define CS1_SW4 0x5A
-#define CS2_SW4 0x5B
-#define CS3_SW4 0x5C
-#define CS4_SW4 0x5D
-#define CS5_SW4 0x5E
-#define CS6_SW4 0x5F
-#define CS7_SW4 0x60
-#define CS8_SW4 0x61
-#define CS9_SW4 0x62
-#define CS10_SW4 0x63
-#define CS11_SW4 0x64
-#define CS12_SW4 0x65
-#define CS13_SW4 0x66
-#define CS14_SW4 0x67
-#define CS15_SW4 0x68
-#define CS16_SW4 0x69
-#define CS17_SW4 0x6A
-#define CS18_SW4 0x6B
-#define CS19_SW4 0x6C
-#define CS20_SW4 0x6D
-#define CS21_SW4 0x6E
-#define CS22_SW4 0x6F
-#define CS23_SW4 0x70
-#define CS24_SW4 0x71
-#define CS25_SW4 0x72
-#define CS26_SW4 0x73
-#define CS27_SW4 0x74
-#define CS28_SW4 0x75
-#define CS29_SW4 0x76
-#define CS30_SW4 0x77
-
-#define CS1_SW5 0x78
-#define CS2_SW5 0x79
-#define CS3_SW5 0x7A
-#define CS4_SW5 0x7B
-#define CS5_SW5 0x7C
-#define CS6_SW5 0x7D
-#define CS7_SW5 0x7E
-#define CS8_SW5 0x7F
-#define CS9_SW5 0x80
-#define CS10_SW5 0x81
-#define CS11_SW5 0x82
-#define CS12_SW5 0x83
-#define CS13_SW5 0x84
-#define CS14_SW5 0x85
-#define CS15_SW5 0x86
-#define CS16_SW5 0x87
-#define CS17_SW5 0x88
-#define CS18_SW5 0x89
-#define CS19_SW5 0x8A
-#define CS20_SW5 0x8B
-#define CS21_SW5 0x8C
-#define CS22_SW5 0x8D
-#define CS23_SW5 0x8E
-#define CS24_SW5 0x8F
-#define CS25_SW5 0x90
-#define CS26_SW5 0x91
-#define CS27_SW5 0x92
-#define CS28_SW5 0x93
-#define CS29_SW5 0x94
-#define CS30_SW5 0x95
-
-#define CS1_SW6 0x96
-#define CS2_SW6 0x97
-#define CS3_SW6 0x98
-#define CS4_SW6 0x99
-#define CS5_SW6 0x9A
-#define CS6_SW6 0x9B
-#define CS7_SW6 0x9C
-#define CS8_SW6 0x9D
-#define CS9_SW6 0x9E
-#define CS10_SW6 0x9F
-#define CS11_SW6 0xA0
-#define CS12_SW6 0xA1
-#define CS13_SW6 0xA2
-#define CS14_SW6 0xA3
-#define CS15_SW6 0xA4
-#define CS16_SW6 0xA5
-#define CS17_SW6 0xA6
-#define CS18_SW6 0xA7
-#define CS19_SW6 0xA8
-#define CS20_SW6 0xA9
-#define CS21_SW6 0xAA
-#define CS22_SW6 0xAB
-#define CS23_SW6 0xAC
-#define CS24_SW6 0xAD
-#define CS25_SW6 0xAE
-#define CS26_SW6 0xAF
-#define CS27_SW6 0xB0
-#define CS28_SW6 0xB1
-#define CS29_SW6 0xB2
-#define CS30_SW6 0xB3
diff --git a/drivers/led/issi/is31fl3743a-mono.c b/drivers/led/issi/is31fl3743a-mono.c
new file mode 100644
index 0000000000..f8340222e4
--- /dev/null
+++ b/drivers/led/issi/is31fl3743a-mono.c
@@ -0,0 +1,216 @@
+#include "is31fl3743a-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3743A_PWM_REGISTER_COUNT 198
+#define IS31FL3743A_SCALING_REGISTER_COUNT 198
+
+#ifndef IS31FL3743A_I2C_TIMEOUT
+#    define IS31FL3743A_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3743A_I2C_PERSISTENCE
+#    define IS31FL3743A_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3743A_CONFIGURATION
+#    define IS31FL3743A_CONFIGURATION 0x01
+#endif
+
+#ifndef IS31FL3743A_SW_PULLDOWN
+#    define IS31FL3743A_SW_PULLDOWN IS31FL3743A_PDR_2K_OHM_SW_OFF
+#endif
+
+#ifndef IS31FL3743A_CS_PULLUP
+#    define IS31FL3743A_CS_PULLUP IS31FL3743A_PUR_2K_OHM_CS_OFF
+#endif
+
+#ifndef IS31FL3743A_GLOBAL_CURRENT
+#    define IS31FL3743A_GLOBAL_CURRENT 0xFF
+#endif
+
+#ifndef IS31FL3743A_SYNC_1
+#    define IS31FL3743A_SYNC_1 IS31FL3743A_SYNC_NONE
+#endif
+#ifndef IS31FL3743A_SYNC_2
+#    define IS31FL3743A_SYNC_2 IS31FL3743A_SYNC_NONE
+#endif
+#ifndef IS31FL3743A_SYNC_3
+#    define IS31FL3743A_SYNC_3 IS31FL3743A_SYNC_NONE
+#endif
+#ifndef IS31FL3743A_SYNC_4
+#    define IS31FL3743A_SYNC_4 IS31FL3743A_SYNC_NONE
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
+
+void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3743A_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3743A_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3743A_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3743a_select_page(uint8_t addr, uint8_t page) {
+    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND, page);
+}
+
+void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i + 1;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3743A_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3743A_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3743A_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3743a_init_drivers(void) {
+    i2c_init();
+
+    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_1, IS31FL3743A_SYNC_1);
+#if defined(IS31FL3743A_I2C_ADDRESS_2)
+    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_2, IS31FL3743A_SYNC_2);
+#    if defined(IS31FL3743A_I2C_ADDRESS_3)
+    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_3, IS31FL3743A_SYNC_3);
+#        if defined(IS31FL3743A_I2C_ADDRESS_4)
+    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_4, IS31FL3743A_SYNC_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
+        is31fl3743a_set_scaling_register(i, 0xFF);
+    }
+
+    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3743A_I2C_ADDRESS_2)
+    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3743A_I2C_ADDRESS_3)
+    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3743A_I2C_ADDRESS_4)
+    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3743a_init(uint8_t addr, uint8_t sync) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
+        is31fl3743a_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i++) {
+        is31fl3743a_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_FUNCTION);
+
+    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
+    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
+    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3743a_set_value(int index, uint8_t value) {
+    is31fl3743a_led_t led;
+    if (index >= 0 && index < IS31FL3743A_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer_update_required[led.driver] = true;
+        g_pwm_buffer[led.driver][led.v]          = value;
+    }
+}
+
+void is31fl3743a_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
+        is31fl3743a_set_value(i, value);
+    }
+}
+
+void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value) {
+    is31fl3743a_led_t led;
+    memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.v] = value;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
+
+        is31fl3743a_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
+            is31fl3743a_write_register(addr, i + 1, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3743a_flush(void) {
+    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3743A_I2C_ADDRESS_2)
+    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3743A_I2C_ADDRESS_3)
+    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3743A_I2C_ADDRESS_4)
+    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3743a-mono.h b/drivers/led/issi/is31fl3743a-mono.h
new file mode 100644
index 0000000000..544531ec25
--- /dev/null
+++ b/drivers/led/issi/is31fl3743a-mono.h
@@ -0,0 +1,329 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+#define IS31FL3743A_REG_ID 0xFC
+
+#define IS31FL3743A_REG_COMMAND 0xFD
+
+#define IS31FL3743A_COMMAND_PWM 0x00
+#define IS31FL3743A_COMMAND_SCALING 0x01
+#define IS31FL3743A_COMMAND_FUNCTION 0x02
+
+#define IS31FL3743A_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3743A_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3743A_FUNCTION_REG_TEMPERATURE 0x24
+#define IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM 0x25
+#define IS31FL3743A_FUNCTION_REG_RESET 0x2F
+
+#define IS31FL3743A_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3743A_I2C_ADDRESS_GND_GND 0x20
+#define IS31FL3743A_I2C_ADDRESS_GND_SCL 0x21
+#define IS31FL3743A_I2C_ADDRESS_GND_SDA 0x22
+#define IS31FL3743A_I2C_ADDRESS_GND_VCC 0x23
+#define IS31FL3743A_I2C_ADDRESS_SCL_GND 0x24
+#define IS31FL3743A_I2C_ADDRESS_SCL_SCL 0x25
+#define IS31FL3743A_I2C_ADDRESS_SCL_SDA 0x26
+#define IS31FL3743A_I2C_ADDRESS_SCL_VCC 0x27
+#define IS31FL3743A_I2C_ADDRESS_SDA_GND 0x28
+#define IS31FL3743A_I2C_ADDRESS_SDA_SCL 0x29
+#define IS31FL3743A_I2C_ADDRESS_SDA_SDA 0x2A
+#define IS31FL3743A_I2C_ADDRESS_SDA_VCC 0x2B
+#define IS31FL3743A_I2C_ADDRESS_VCC_GND 0x2C
+#define IS31FL3743A_I2C_ADDRESS_VCC_SCL 0x2D
+#define IS31FL3743A_I2C_ADDRESS_VCC_SDA 0x2E
+#define IS31FL3743A_I2C_ADDRESS_VCC_VCC 0x2F
+
+#if defined(LED_MATRIX_IS31FL3743A)
+#    define IS31FL3743A_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3743A_I2C_ADDRESS_4)
+#    define IS31FL3743A_DRIVER_COUNT 4
+#elif defined(IS31FL3743A_I2C_ADDRESS_3)
+#    define IS31FL3743A_DRIVER_COUNT 3
+#elif defined(IS31FL3743A_I2C_ADDRESS_2)
+#    define IS31FL3743A_DRIVER_COUNT 2
+#elif defined(IS31FL3743A_I2C_ADDRESS_1)
+#    define IS31FL3743A_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3743a_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3743a_led_t;
+
+extern const is31fl3743a_led_t PROGMEM g_is31fl3743a_leds[IS31FL3743A_LED_COUNT];
+
+void is31fl3743a_init_drivers(void);
+void is31fl3743a_init(uint8_t addr, uint8_t sync);
+void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3743a_select_page(uint8_t addr, uint8_t page);
+void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3743a_set_value(int index, uint8_t value);
+void is31fl3743a_set_value_all(uint8_t value);
+
+void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value);
+
+void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index);
+
+void is31fl3743a_flush(void);
+
+#define IS31FL3743A_PDR_0_OHM 0b000          // No pull-down resistor
+#define IS31FL3743A_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
+#define IS31FL3743A_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
+#define IS31FL3743A_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
+#define IS31FL3743A_PDR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3743A_PDR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3743A_PDR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3743A_PDR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3743A_PUR_0_OHM 0b000          // No pull-up resistor
+#define IS31FL3743A_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
+#define IS31FL3743A_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
+#define IS31FL3743A_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
+#define IS31FL3743A_PUR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3743A_PUR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3743A_PUR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3743A_PUR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3743A_SYNC_NONE 0b00
+#define IS31FL3743A_SYNC_SLAVE 0b10
+#define IS31FL3743A_SYNC_MASTER 0b11
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
+
+#define CS1_SW9 0x90
+#define CS2_SW9 0x91
+#define CS3_SW9 0x92
+#define CS4_SW9 0x93
+#define CS5_SW9 0x94
+#define CS6_SW9 0x95
+#define CS7_SW9 0x96
+#define CS8_SW9 0x97
+#define CS9_SW9 0x98
+#define CS10_SW9 0x99
+#define CS11_SW9 0x9A
+#define CS12_SW9 0x9B
+#define CS13_SW9 0x9C
+#define CS14_SW9 0x9D
+#define CS15_SW9 0x9E
+#define CS16_SW9 0x9F
+#define CS17_SW9 0xA0
+#define CS18_SW9 0xA1
+
+#define CS1_SW10 0xA2
+#define CS2_SW10 0xA3
+#define CS3_SW10 0xA4
+#define CS4_SW10 0xA5
+#define CS5_SW10 0xA6
+#define CS6_SW10 0xA7
+#define CS7_SW10 0xA8
+#define CS8_SW10 0xA9
+#define CS9_SW10 0xAA
+#define CS10_SW10 0xAB
+#define CS11_SW10 0xAC
+#define CS12_SW10 0xAD
+#define CS13_SW10 0xAE
+#define CS14_SW10 0xAF
+#define CS15_SW10 0xB0
+#define CS16_SW10 0xB1
+#define CS17_SW10 0xB2
+#define CS18_SW10 0xB3
+
+#define CS1_SW11 0xB4
+#define CS2_SW11 0xB5
+#define CS3_SW11 0xB6
+#define CS4_SW11 0xB7
+#define CS5_SW11 0xB8
+#define CS6_SW11 0xB9
+#define CS7_SW11 0xBA
+#define CS8_SW11 0xBB
+#define CS9_SW11 0xBC
+#define CS10_SW11 0xBD
+#define CS11_SW11 0xBE
+#define CS12_SW11 0xBF
+#define CS13_SW11 0xC0
+#define CS14_SW11 0xC1
+#define CS15_SW11 0xC2
+#define CS16_SW11 0xC3
+#define CS17_SW11 0xC4
+#define CS18_SW11 0xC5
diff --git a/drivers/led/issi/is31fl3743a-simple.c b/drivers/led/issi/is31fl3743a-simple.c
deleted file mode 100644
index 26c42ea69c..0000000000
--- a/drivers/led/issi/is31fl3743a-simple.c
+++ /dev/null
@@ -1,216 +0,0 @@
-#include "is31fl3743a-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3743A_PWM_REGISTER_COUNT 198
-#define IS31FL3743A_SCALING_REGISTER_COUNT 198
-
-#ifndef IS31FL3743A_I2C_TIMEOUT
-#    define IS31FL3743A_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3743A_I2C_PERSISTENCE
-#    define IS31FL3743A_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3743A_CONFIGURATION
-#    define IS31FL3743A_CONFIGURATION 0x01
-#endif
-
-#ifndef IS31FL3743A_SW_PULLDOWN
-#    define IS31FL3743A_SW_PULLDOWN IS31FL3743A_PDR_2K_OHM_SW_OFF
-#endif
-
-#ifndef IS31FL3743A_CS_PULLUP
-#    define IS31FL3743A_CS_PULLUP IS31FL3743A_PUR_2K_OHM_CS_OFF
-#endif
-
-#ifndef IS31FL3743A_GLOBAL_CURRENT
-#    define IS31FL3743A_GLOBAL_CURRENT 0xFF
-#endif
-
-#ifndef IS31FL3743A_SYNC_1
-#    define IS31FL3743A_SYNC_1 IS31FL3743A_SYNC_NONE
-#endif
-#ifndef IS31FL3743A_SYNC_2
-#    define IS31FL3743A_SYNC_2 IS31FL3743A_SYNC_NONE
-#endif
-#ifndef IS31FL3743A_SYNC_3
-#    define IS31FL3743A_SYNC_3 IS31FL3743A_SYNC_NONE
-#endif
-#ifndef IS31FL3743A_SYNC_4
-#    define IS31FL3743A_SYNC_4 IS31FL3743A_SYNC_NONE
-#endif
-
-uint8_t i2c_transfer_buffer[20] = {0xFF};
-
-uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT]        = {false};
-bool    g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};
-
-uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
-
-void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3743A_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3743A_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3743A_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3743a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND, page);
-}
-
-void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assumes page 0 is already selected.
-    // If any of the transactions fails function returns false.
-    // Transmit PWM registers in 12 transfers of 16 bytes.
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // Iterate over the pwm_buffer contents at 16 byte intervals.
-    for (int i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i + 1;
-        // Copy the data from i to i+15.
-        // Device will auto-increment register for data after the first byte
-        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3743A_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3743A_I2C_TIMEOUT) != 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3743A_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3743a_init_drivers(void) {
-    i2c_init();
-
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_1, IS31FL3743A_SYNC_1);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_2, IS31FL3743A_SYNC_2);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_3, IS31FL3743A_SYNC_3);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_4, IS31FL3743A_SYNC_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
-        is31fl3743a_set_scaling_register(i, 0xFF);
-    }
-
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3743a_init(uint8_t addr, uint8_t sync) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3743a_write_register(addr, i + 1, 0x00);
-    }
-
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
-
-    for (int i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i++) {
-        is31fl3743a_write_register(addr, i + 1, 0x00);
-    }
-
-    is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_FUNCTION);
-
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
-    is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3743a_set_value(int index, uint8_t value) {
-    is31fl3743a_led_t led;
-    if (index >= 0 && index < IS31FL3743A_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer_update_required[led.driver] = true;
-        g_pwm_buffer[led.driver][led.v]          = value;
-    }
-}
-
-void is31fl3743a_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
-        is31fl3743a_set_value(i, value);
-    }
-}
-
-void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value) {
-    is31fl3743a_led_t led;
-    memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));
-
-    g_scaling_registers[led.driver][led.v] = value;
-
-    g_scaling_registers_update_required[led.driver] = true;
-}
-
-void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
-
-        is31fl3743a_write_pwm_buffer(addr, g_pwm_buffer[index]);
-    }
-
-    g_pwm_buffer_update_required[index] = false;
-}
-
-void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
-    if (g_scaling_registers_update_required[index]) {
-        is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
-
-        for (int i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3743a_write_register(addr, i + 1, g_scaling_registers[index][i]);
-        }
-        g_scaling_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3743a_flush(void) {
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3743A_I2C_ADDRESS_2)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3743A_I2C_ADDRESS_3)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3743A_I2C_ADDRESS_4)
-    is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3743a-simple.h b/drivers/led/issi/is31fl3743a-simple.h
deleted file mode 100644
index 544531ec25..0000000000
--- a/drivers/led/issi/is31fl3743a-simple.h
+++ /dev/null
@@ -1,329 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2020 MelGeek
- * Copyright 2021 MasterSpoon
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-#define IS31FL3743A_REG_ID 0xFC
-
-#define IS31FL3743A_REG_COMMAND 0xFD
-
-#define IS31FL3743A_COMMAND_PWM 0x00
-#define IS31FL3743A_COMMAND_SCALING 0x01
-#define IS31FL3743A_COMMAND_FUNCTION 0x02
-
-#define IS31FL3743A_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3743A_FUNCTION_REG_PULLDOWNUP 0x02
-#define IS31FL3743A_FUNCTION_REG_TEMPERATURE 0x24
-#define IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM 0x25
-#define IS31FL3743A_FUNCTION_REG_RESET 0x2F
-
-#define IS31FL3743A_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3743A_I2C_ADDRESS_GND_GND 0x20
-#define IS31FL3743A_I2C_ADDRESS_GND_SCL 0x21
-#define IS31FL3743A_I2C_ADDRESS_GND_SDA 0x22
-#define IS31FL3743A_I2C_ADDRESS_GND_VCC 0x23
-#define IS31FL3743A_I2C_ADDRESS_SCL_GND 0x24
-#define IS31FL3743A_I2C_ADDRESS_SCL_SCL 0x25
-#define IS31FL3743A_I2C_ADDRESS_SCL_SDA 0x26
-#define IS31FL3743A_I2C_ADDRESS_SCL_VCC 0x27
-#define IS31FL3743A_I2C_ADDRESS_SDA_GND 0x28
-#define IS31FL3743A_I2C_ADDRESS_SDA_SCL 0x29
-#define IS31FL3743A_I2C_ADDRESS_SDA_SDA 0x2A
-#define IS31FL3743A_I2C_ADDRESS_SDA_VCC 0x2B
-#define IS31FL3743A_I2C_ADDRESS_VCC_GND 0x2C
-#define IS31FL3743A_I2C_ADDRESS_VCC_SCL 0x2D
-#define IS31FL3743A_I2C_ADDRESS_VCC_SDA 0x2E
-#define IS31FL3743A_I2C_ADDRESS_VCC_VCC 0x2F
-
-#if defined(LED_MATRIX_IS31FL3743A)
-#    define IS31FL3743A_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3743A_I2C_ADDRESS_4)
-#    define IS31FL3743A_DRIVER_COUNT 4
-#elif defined(IS31FL3743A_I2C_ADDRESS_3)
-#    define IS31FL3743A_DRIVER_COUNT 3
-#elif defined(IS31FL3743A_I2C_ADDRESS_2)
-#    define IS31FL3743A_DRIVER_COUNT 2
-#elif defined(IS31FL3743A_I2C_ADDRESS_1)
-#    define IS31FL3743A_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3743a_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3743a_led_t;
-
-extern const is31fl3743a_led_t PROGMEM g_is31fl3743a_leds[IS31FL3743A_LED_COUNT];
-
-void is31fl3743a_init_drivers(void);
-void is31fl3743a_init(uint8_t addr, uint8_t sync);
-void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3743a_select_page(uint8_t addr, uint8_t page);
-void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3743a_set_value(int index, uint8_t value);
-void is31fl3743a_set_value_all(uint8_t value);
-
-void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value);
-
-void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index);
-
-void is31fl3743a_flush(void);
-
-#define IS31FL3743A_PDR_0_OHM 0b000          // No pull-down resistor
-#define IS31FL3743A_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
-#define IS31FL3743A_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
-#define IS31FL3743A_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
-#define IS31FL3743A_PDR_1K_OHM 0b100         // 1 kOhm resistor
-#define IS31FL3743A_PDR_2K_OHM 0b101         // 2 kOhm resistor
-#define IS31FL3743A_PDR_4K_OHM 0b110         // 4 kOhm resistor
-#define IS31FL3743A_PDR_8K_OHM 0b111         // 8 kOhm resistor
-
-#define IS31FL3743A_PUR_0_OHM 0b000          // No pull-up resistor
-#define IS31FL3743A_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
-#define IS31FL3743A_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
-#define IS31FL3743A_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
-#define IS31FL3743A_PUR_1K_OHM 0b100         // 1 kOhm resistor
-#define IS31FL3743A_PUR_2K_OHM 0b101         // 2 kOhm resistor
-#define IS31FL3743A_PUR_4K_OHM 0b110         // 4 kOhm resistor
-#define IS31FL3743A_PUR_8K_OHM 0b111         // 8 kOhm resistor
-
-#define IS31FL3743A_SYNC_NONE 0b00
-#define IS31FL3743A_SYNC_SLAVE 0b10
-#define IS31FL3743A_SYNC_MASTER 0b11
-
-#define CS1_SW1 0x00
-#define CS2_SW1 0x01
-#define CS3_SW1 0x02
-#define CS4_SW1 0x03
-#define CS5_SW1 0x04
-#define CS6_SW1 0x05
-#define CS7_SW1 0x06
-#define CS8_SW1 0x07
-#define CS9_SW1 0x08
-#define CS10_SW1 0x09
-#define CS11_SW1 0x0A
-#define CS12_SW1 0x0B
-#define CS13_SW1 0x0C
-#define CS14_SW1 0x0D
-#define CS15_SW1 0x0E
-#define CS16_SW1 0x0F
-#define CS17_SW1 0x10
-#define CS18_SW1 0x11
-
-#define CS1_SW2 0x12
-#define CS2_SW2 0x13
-#define CS3_SW2 0x14
-#define CS4_SW2 0x15
-#define CS5_SW2 0x16
-#define CS6_SW2 0x17
-#define CS7_SW2 0x18
-#define CS8_SW2 0x19
-#define CS9_SW2 0x1A
-#define CS10_SW2 0x1B
-#define CS11_SW2 0x1C
-#define CS12_SW2 0x1D
-#define CS13_SW2 0x1E
-#define CS14_SW2 0x1F
-#define CS15_SW2 0x20
-#define CS16_SW2 0x21
-#define CS17_SW2 0x22
-#define CS18_SW2 0x23
-
-#define CS1_SW3 0x24
-#define CS2_SW3 0x25
-#define CS3_SW3 0x26
-#define CS4_SW3 0x27
-#define CS5_SW3 0x28
-#define CS6_SW3 0x29
-#define CS7_SW3 0x2A
-#define CS8_SW3 0x2B
-#define CS9_SW3 0x2C
-#define CS10_SW3 0x2D
-#define CS11_SW3 0x2E
-#define CS12_SW3 0x2F
-#define CS13_SW3 0x30
-#define CS14_SW3 0x31
-#define CS15_SW3 0x32
-#define CS16_SW3 0x33
-#define CS17_SW3 0x34
-#define CS18_SW3 0x35
-
-#define CS1_SW4 0x36
-#define CS2_SW4 0x37
-#define CS3_SW4 0x38
-#define CS4_SW4 0x39
-#define CS5_SW4 0x3A
-#define CS6_SW4 0x3B
-#define CS7_SW4 0x3C
-#define CS8_SW4 0x3D
-#define CS9_SW4 0x3E
-#define CS10_SW4 0x3F
-#define CS11_SW4 0x40
-#define CS12_SW4 0x41
-#define CS13_SW4 0x42
-#define CS14_SW4 0x43
-#define CS15_SW4 0x44
-#define CS16_SW4 0x45
-#define CS17_SW4 0x46
-#define CS18_SW4 0x47
-
-#define CS1_SW5 0x48
-#define CS2_SW5 0x49
-#define CS3_SW5 0x4A
-#define CS4_SW5 0x4B
-#define CS5_SW5 0x4C
-#define CS6_SW5 0x4D
-#define CS7_SW5 0x4E
-#define CS8_SW5 0x4F
-#define CS9_SW5 0x50
-#define CS10_SW5 0x51
-#define CS11_SW5 0x52
-#define CS12_SW5 0x53
-#define CS13_SW5 0x54
-#define CS14_SW5 0x55
-#define CS15_SW5 0x56
-#define CS16_SW5 0x57
-#define CS17_SW5 0x58
-#define CS18_SW5 0x59
-
-#define CS1_SW6 0x5A
-#define CS2_SW6 0x5B
-#define CS3_SW6 0x5C
-#define CS4_SW6 0x5D
-#define CS5_SW6 0x5E
-#define CS6_SW6 0x5F
-#define CS7_SW6 0x60
-#define CS8_SW6 0x61
-#define CS9_SW6 0x62
-#define CS10_SW6 0x63
-#define CS11_SW6 0x64
-#define CS12_SW6 0x65
-#define CS13_SW6 0x66
-#define CS14_SW6 0x67
-#define CS15_SW6 0x68
-#define CS16_SW6 0x69
-#define CS17_SW6 0x6A
-#define CS18_SW6 0x6B
-
-#define CS1_SW7 0x6C
-#define CS2_SW7 0x6D
-#define CS3_SW7 0x6E
-#define CS4_SW7 0x6F
-#define CS5_SW7 0x70
-#define CS6_SW7 0x71
-#define CS7_SW7 0x72
-#define CS8_SW7 0x73
-#define CS9_SW7 0x74
-#define CS10_SW7 0x75
-#define CS11_SW7 0x76
-#define CS12_SW7 0x77
-#define CS13_SW7 0x78
-#define CS14_SW7 0x79
-#define CS15_SW7 0x7A
-#define CS16_SW7 0x7B
-#define CS17_SW7 0x7C
-#define CS18_SW7 0x7D
-
-#define CS1_SW8 0x7E
-#define CS2_SW8 0x7F
-#define CS3_SW8 0x80
-#define CS4_SW8 0x81
-#define CS5_SW8 0x82
-#define CS6_SW8 0x83
-#define CS7_SW8 0x84
-#define CS8_SW8 0x85
-#define CS9_SW8 0x86
-#define CS10_SW8 0x87
-#define CS11_SW8 0x88
-#define CS12_SW8 0x89
-#define CS13_SW8 0x8A
-#define CS14_SW8 0x8B
-#define CS15_SW8 0x8C
-#define CS16_SW8 0x8D
-#define CS17_SW8 0x8E
-#define CS18_SW8 0x8F
-
-#define CS1_SW9 0x90
-#define CS2_SW9 0x91
-#define CS3_SW9 0x92
-#define CS4_SW9 0x93
-#define CS5_SW9 0x94
-#define CS6_SW9 0x95
-#define CS7_SW9 0x96
-#define CS8_SW9 0x97
-#define CS9_SW9 0x98
-#define CS10_SW9 0x99
-#define CS11_SW9 0x9A
-#define CS12_SW9 0x9B
-#define CS13_SW9 0x9C
-#define CS14_SW9 0x9D
-#define CS15_SW9 0x9E
-#define CS16_SW9 0x9F
-#define CS17_SW9 0xA0
-#define CS18_SW9 0xA1
-
-#define CS1_SW10 0xA2
-#define CS2_SW10 0xA3
-#define CS3_SW10 0xA4
-#define CS4_SW10 0xA5
-#define CS5_SW10 0xA6
-#define CS6_SW10 0xA7
-#define CS7_SW10 0xA8
-#define CS8_SW10 0xA9
-#define CS9_SW10 0xAA
-#define CS10_SW10 0xAB
-#define CS11_SW10 0xAC
-#define CS12_SW10 0xAD
-#define CS13_SW10 0xAE
-#define CS14_SW10 0xAF
-#define CS15_SW10 0xB0
-#define CS16_SW10 0xB1
-#define CS17_SW10 0xB2
-#define CS18_SW10 0xB3
-
-#define CS1_SW11 0xB4
-#define CS2_SW11 0xB5
-#define CS3_SW11 0xB6
-#define CS4_SW11 0xB7
-#define CS5_SW11 0xB8
-#define CS6_SW11 0xB9
-#define CS7_SW11 0xBA
-#define CS8_SW11 0xBB
-#define CS9_SW11 0xBC
-#define CS10_SW11 0xBD
-#define CS11_SW11 0xBE
-#define CS12_SW11 0xBF
-#define CS13_SW11 0xC0
-#define CS14_SW11 0xC1
-#define CS15_SW11 0xC2
-#define CS16_SW11 0xC3
-#define CS17_SW11 0xC4
-#define CS18_SW11 0xC5
diff --git a/drivers/led/issi/is31fl3745-mono.c b/drivers/led/issi/is31fl3745-mono.c
new file mode 100644
index 0000000000..c99f397f53
--- /dev/null
+++ b/drivers/led/issi/is31fl3745-mono.c
@@ -0,0 +1,216 @@
+#include "is31fl3745-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3745_PWM_REGISTER_COUNT 144
+#define IS31FL3745_SCALING_REGISTER_COUNT 144
+
+#ifndef IS31FL3745_I2C_TIMEOUT
+#    define IS31FL3745_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3745_I2C_PERSISTENCE
+#    define IS31FL3745_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3745_CONFIGURATION
+#    define IS31FL3745_CONFIGURATION 0x31
+#endif
+
+#ifndef IS31FL3745_SW_PULLDOWN
+#    define IS31FL3745_SW_PULLDOWN IS31FL3745_PDR_2K_OHM_SW_OFF
+#endif
+
+#ifndef IS31FL3745_CS_PULLUP
+#    define IS31FL3745_CS_PULLUP IS31FL3745_PUR_2K_OHM_CS_OFF
+#endif
+
+#ifndef IS31FL3745_GLOBAL_CURRENT
+#    define IS31FL3745_GLOBAL_CURRENT 0xFF
+#endif
+
+#ifndef IS31FL3745_SYNC_1
+#    define IS31FL3745_SYNC_1 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_2
+#    define IS31FL3745_SYNC_2 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_3
+#    define IS31FL3745_SYNC_3 IS31FL3745_SYNC_NONE
+#endif
+#ifndef IS31FL3745_SYNC_4
+#    define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
+
+void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3745_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3745_select_page(uint8_t addr, uint8_t page) {
+    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND, page);
+}
+
+void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i + 1;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3745_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3745_init_drivers(void) {
+    i2c_init();
+
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_1, IS31FL3745_SYNC_1);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_2, IS31FL3745_SYNC_2);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_3, IS31FL3745_SYNC_3);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_init(IS31FL3745_I2C_ADDRESS_4, IS31FL3745_SYNC_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
+        is31fl3745_set_scaling_register(i, 0xFF);
+    }
+
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3745_init(uint8_t addr, uint8_t sync) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
+        is31fl3745_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
+        is31fl3745_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3745_select_page(addr, IS31FL3745_COMMAND_FUNCTION);
+
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
+    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3745_set_value(int index, uint8_t value) {
+    is31fl3745_led_t led;
+    if (index >= 0 && index < IS31FL3745_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer_update_required[led.driver] = true;
+        g_pwm_buffer[led.driver][led.v]          = value;
+    }
+}
+
+void is31fl3745_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
+        is31fl3745_set_value(i, value);
+    }
+}
+
+void is31fl3745_set_scaling_register(uint8_t index, uint8_t value) {
+    is31fl3745_led_t led;
+    memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.v] = value;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
+
+        is31fl3745_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
+            is31fl3745_write_register(addr, i + 1, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3745_flush(void) {
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3745_I2C_ADDRESS_2)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3745_I2C_ADDRESS_3)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3745_I2C_ADDRESS_4)
+    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3745-mono.h b/drivers/led/issi/is31fl3745-mono.h
new file mode 100644
index 0000000000..dbff193acd
--- /dev/null
+++ b/drivers/led/issi/is31fl3745-mono.h
@@ -0,0 +1,272 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+#define IS31FL3745_REG_ID 0xFC
+
+#define IS31FL3745_REG_COMMAND 0xFD
+
+#define IS31FL3745_COMMAND_PWM 0x00
+#define IS31FL3745_COMMAND_SCALING 0x01
+#define IS31FL3745_COMMAND_FUNCTION 0x02
+
+#define IS31FL3745_FUNCTION_REG_CONFIGURATION 0x00
+#define IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT 0x01
+#define IS31FL3745_FUNCTION_REG_PULLDOWNUP 0x02
+#define IS31FL3745_FUNCTION_REG_TEMPERATURE 0x24
+#define IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM 0x25
+#define IS31FL3745_FUNCTION_REG_RESET 0x2F
+
+#define IS31FL3745_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3745_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3745_I2C_ADDRESS_GND_GND 0x20
+#define IS31FL3745_I2C_ADDRESS_GND_SCL 0x21
+#define IS31FL3745_I2C_ADDRESS_GND_SDA 0x22
+#define IS31FL3745_I2C_ADDRESS_GND_VCC 0x23
+#define IS31FL3745_I2C_ADDRESS_SCL_GND 0x24
+#define IS31FL3745_I2C_ADDRESS_SCL_SCL 0x25
+#define IS31FL3745_I2C_ADDRESS_SCL_SDA 0x26
+#define IS31FL3745_I2C_ADDRESS_SCL_VCC 0x27
+#define IS31FL3745_I2C_ADDRESS_SDA_GND 0x28
+#define IS31FL3745_I2C_ADDRESS_SDA_SCL 0x29
+#define IS31FL3745_I2C_ADDRESS_SDA_SDA 0x2A
+#define IS31FL3745_I2C_ADDRESS_SDA_VCC 0x2B
+#define IS31FL3745_I2C_ADDRESS_VCC_GND 0x2C
+#define IS31FL3745_I2C_ADDRESS_VCC_SCL 0x2D
+#define IS31FL3745_I2C_ADDRESS_VCC_SDA 0x2E
+#define IS31FL3745_I2C_ADDRESS_VCC_VCC 0x2F
+
+#if defined(LED_MATRIX_IS31FL3745)
+#    define IS31FL3745_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(IS31FL3745_I2C_ADDRESS_4)
+#    define IS31FL3745_DRIVER_COUNT 4
+#elif defined(IS31FL3745_I2C_ADDRESS_3)
+#    define IS31FL3745_DRIVER_COUNT 3
+#elif defined(IS31FL3745_I2C_ADDRESS_2)
+#    define IS31FL3745_DRIVER_COUNT 2
+#elif defined(IS31FL3745_I2C_ADDRESS_1)
+#    define IS31FL3745_DRIVER_COUNT 1
+#endif
+
+typedef struct is31fl3745_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3745_led_t;
+
+extern const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT];
+
+void is31fl3745_init_drivers(void);
+void is31fl3745_init(uint8_t addr, uint8_t sync);
+void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3745_select_page(uint8_t addr, uint8_t page);
+void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3745_set_value(int index, uint8_t value);
+void is31fl3745_set_value_all(uint8_t value);
+
+void is31fl3745_set_scaling_register(uint8_t index, uint8_t value);
+
+void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index);
+
+void is31fl3745_flush(void);
+
+#define IS31FL3745_PDR_0_OHM 0b000          // No pull-down resistor
+#define IS31FL3745_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
+#define IS31FL3745_PDR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3745_PDR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3745_PDR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3745_PDR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3745_PUR_0_OHM 0b000          // No pull-up resistor
+#define IS31FL3745_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
+#define IS31FL3745_PUR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3745_PUR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3745_PUR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3745_PUR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3745_SYNC_NONE 0b00
+#define IS31FL3745_SYNC_SLAVE 0b10
+#define IS31FL3745_SYNC_MASTER 0b11
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
+
+#define CS1_SW5 0x48
+#define CS2_SW5 0x49
+#define CS3_SW5 0x4A
+#define CS4_SW5 0x4B
+#define CS5_SW5 0x4C
+#define CS6_SW5 0x4D
+#define CS7_SW5 0x4E
+#define CS8_SW5 0x4F
+#define CS9_SW5 0x50
+#define CS10_SW5 0x51
+#define CS11_SW5 0x52
+#define CS12_SW5 0x53
+#define CS13_SW5 0x54
+#define CS14_SW5 0x55
+#define CS15_SW5 0x56
+#define CS16_SW5 0x57
+#define CS17_SW5 0x58
+#define CS18_SW5 0x59
+
+#define CS1_SW6 0x5A
+#define CS2_SW6 0x5B
+#define CS3_SW6 0x5C
+#define CS4_SW6 0x5D
+#define CS5_SW6 0x5E
+#define CS6_SW6 0x5F
+#define CS7_SW6 0x60
+#define CS8_SW6 0x61
+#define CS9_SW6 0x62
+#define CS10_SW6 0x63
+#define CS11_SW6 0x64
+#define CS12_SW6 0x65
+#define CS13_SW6 0x66
+#define CS14_SW6 0x67
+#define CS15_SW6 0x68
+#define CS16_SW6 0x69
+#define CS17_SW6 0x6A
+#define CS18_SW6 0x6B
+
+#define CS1_SW7 0x6C
+#define CS2_SW7 0x6D
+#define CS3_SW7 0x6E
+#define CS4_SW7 0x6F
+#define CS5_SW7 0x70
+#define CS6_SW7 0x71
+#define CS7_SW7 0x72
+#define CS8_SW7 0x73
+#define CS9_SW7 0x74
+#define CS10_SW7 0x75
+#define CS11_SW7 0x76
+#define CS12_SW7 0x77
+#define CS13_SW7 0x78
+#define CS14_SW7 0x79
+#define CS15_SW7 0x7A
+#define CS16_SW7 0x7B
+#define CS17_SW7 0x7C
+#define CS18_SW7 0x7D
+
+#define CS1_SW8 0x7E
+#define CS2_SW8 0x7F
+#define CS3_SW8 0x80
+#define CS4_SW8 0x81
+#define CS5_SW8 0x82
+#define CS6_SW8 0x83
+#define CS7_SW8 0x84
+#define CS8_SW8 0x85
+#define CS9_SW8 0x86
+#define CS10_SW8 0x87
+#define CS11_SW8 0x88
+#define CS12_SW8 0x89
+#define CS13_SW8 0x8A
+#define CS14_SW8 0x8B
+#define CS15_SW8 0x8C
+#define CS16_SW8 0x8D
+#define CS17_SW8 0x8E
+#define CS18_SW8 0x8F
diff --git a/drivers/led/issi/is31fl3745-simple.c b/drivers/led/issi/is31fl3745-simple.c
deleted file mode 100644
index 46b41fe3d4..0000000000
--- a/drivers/led/issi/is31fl3745-simple.c
+++ /dev/null
@@ -1,216 +0,0 @@
-#include "is31fl3745-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3745_PWM_REGISTER_COUNT 144
-#define IS31FL3745_SCALING_REGISTER_COUNT 144
-
-#ifndef IS31FL3745_I2C_TIMEOUT
-#    define IS31FL3745_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3745_I2C_PERSISTENCE
-#    define IS31FL3745_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3745_CONFIGURATION
-#    define IS31FL3745_CONFIGURATION 0x31
-#endif
-
-#ifndef IS31FL3745_SW_PULLDOWN
-#    define IS31FL3745_SW_PULLDOWN IS31FL3745_PDR_2K_OHM_SW_OFF
-#endif
-
-#ifndef IS31FL3745_CS_PULLUP
-#    define IS31FL3745_CS_PULLUP IS31FL3745_PUR_2K_OHM_CS_OFF
-#endif
-
-#ifndef IS31FL3745_GLOBAL_CURRENT
-#    define IS31FL3745_GLOBAL_CURRENT 0xFF
-#endif
-
-#ifndef IS31FL3745_SYNC_1
-#    define IS31FL3745_SYNC_1 IS31FL3745_SYNC_NONE
-#endif
-#ifndef IS31FL3745_SYNC_2
-#    define IS31FL3745_SYNC_2 IS31FL3745_SYNC_NONE
-#endif
-#ifndef IS31FL3745_SYNC_3
-#    define IS31FL3745_SYNC_3 IS31FL3745_SYNC_NONE
-#endif
-#ifndef IS31FL3745_SYNC_4
-#    define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
-#endif
-
-uint8_t i2c_transfer_buffer[20] = {0xFF};
-
-uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT]        = {false};
-bool    g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
-
-uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
-
-void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3745_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3745_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3745_select_page(uint8_t addr, uint8_t page) {
-    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3745_write_register(addr, IS31FL3745_REG_COMMAND, page);
-}
-
-void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assumes page 0 is already selected.
-    // If any of the transactions fails function returns false.
-    // Transmit PWM registers in 12 transfers of 16 bytes.
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // Iterate over the pwm_buffer contents at 16 byte intervals.
-    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i + 1;
-        // Copy the data from i to i+15.
-        // Device will auto-increment register for data after the first byte
-        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3745_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT) != 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3745_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3745_init_drivers(void) {
-    i2c_init();
-
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_1, IS31FL3745_SYNC_1);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_2, IS31FL3745_SYNC_2);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_3, IS31FL3745_SYNC_3);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_init(IS31FL3745_I2C_ADDRESS_4, IS31FL3745_SYNC_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
-        is31fl3745_set_scaling_register(i, 0xFF);
-    }
-
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_update_scaling_registers(IS31FL3745_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3745_init(uint8_t addr, uint8_t sync) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
-        is31fl3745_write_register(addr, i + 1, 0x00);
-    }
-
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
-
-    for (int i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
-        is31fl3745_write_register(addr, i + 1, 0x00);
-    }
-
-    is31fl3745_select_page(addr, IS31FL3745_COMMAND_FUNCTION);
-
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
-    is31fl3745_write_register(addr, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3745_set_value(int index, uint8_t value) {
-    is31fl3745_led_t led;
-    if (index >= 0 && index < IS31FL3745_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer_update_required[led.driver] = true;
-        g_pwm_buffer[led.driver][led.v]          = value;
-    }
-}
-
-void is31fl3745_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
-        is31fl3745_set_value(i, value);
-    }
-}
-
-void is31fl3745_set_scaling_register(uint8_t index, uint8_t value) {
-    is31fl3745_led_t led;
-    memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
-
-    g_scaling_registers[led.driver][led.v] = value;
-
-    g_scaling_registers_update_required[led.driver] = true;
-}
-
-void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3745_select_page(addr, IS31FL3745_COMMAND_PWM);
-
-        is31fl3745_write_pwm_buffer(addr, g_pwm_buffer[index]);
-    }
-
-    g_pwm_buffer_update_required[index] = false;
-}
-
-void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index) {
-    if (g_scaling_registers_update_required[index]) {
-        is31fl3745_select_page(addr, IS31FL3745_COMMAND_SCALING);
-
-        for (int i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
-            is31fl3745_write_register(addr, i + 1, g_scaling_registers[index][i]);
-        }
-        g_scaling_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3745_flush(void) {
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3745_I2C_ADDRESS_2)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3745_I2C_ADDRESS_3)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3745_I2C_ADDRESS_4)
-    is31fl3745_update_pwm_buffers(IS31FL3745_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3745-simple.h b/drivers/led/issi/is31fl3745-simple.h
deleted file mode 100644
index dbff193acd..0000000000
--- a/drivers/led/issi/is31fl3745-simple.h
+++ /dev/null
@@ -1,272 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2020 MelGeek
- * Copyright 2021 MasterSpoon
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-#define IS31FL3745_REG_ID 0xFC
-
-#define IS31FL3745_REG_COMMAND 0xFD
-
-#define IS31FL3745_COMMAND_PWM 0x00
-#define IS31FL3745_COMMAND_SCALING 0x01
-#define IS31FL3745_COMMAND_FUNCTION 0x02
-
-#define IS31FL3745_FUNCTION_REG_CONFIGURATION 0x00
-#define IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT 0x01
-#define IS31FL3745_FUNCTION_REG_PULLDOWNUP 0x02
-#define IS31FL3745_FUNCTION_REG_TEMPERATURE 0x24
-#define IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM 0x25
-#define IS31FL3745_FUNCTION_REG_RESET 0x2F
-
-#define IS31FL3745_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3745_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3745_I2C_ADDRESS_GND_GND 0x20
-#define IS31FL3745_I2C_ADDRESS_GND_SCL 0x21
-#define IS31FL3745_I2C_ADDRESS_GND_SDA 0x22
-#define IS31FL3745_I2C_ADDRESS_GND_VCC 0x23
-#define IS31FL3745_I2C_ADDRESS_SCL_GND 0x24
-#define IS31FL3745_I2C_ADDRESS_SCL_SCL 0x25
-#define IS31FL3745_I2C_ADDRESS_SCL_SDA 0x26
-#define IS31FL3745_I2C_ADDRESS_SCL_VCC 0x27
-#define IS31FL3745_I2C_ADDRESS_SDA_GND 0x28
-#define IS31FL3745_I2C_ADDRESS_SDA_SCL 0x29
-#define IS31FL3745_I2C_ADDRESS_SDA_SDA 0x2A
-#define IS31FL3745_I2C_ADDRESS_SDA_VCC 0x2B
-#define IS31FL3745_I2C_ADDRESS_VCC_GND 0x2C
-#define IS31FL3745_I2C_ADDRESS_VCC_SCL 0x2D
-#define IS31FL3745_I2C_ADDRESS_VCC_SDA 0x2E
-#define IS31FL3745_I2C_ADDRESS_VCC_VCC 0x2F
-
-#if defined(LED_MATRIX_IS31FL3745)
-#    define IS31FL3745_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(IS31FL3745_I2C_ADDRESS_4)
-#    define IS31FL3745_DRIVER_COUNT 4
-#elif defined(IS31FL3745_I2C_ADDRESS_3)
-#    define IS31FL3745_DRIVER_COUNT 3
-#elif defined(IS31FL3745_I2C_ADDRESS_2)
-#    define IS31FL3745_DRIVER_COUNT 2
-#elif defined(IS31FL3745_I2C_ADDRESS_1)
-#    define IS31FL3745_DRIVER_COUNT 1
-#endif
-
-typedef struct is31fl3745_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3745_led_t;
-
-extern const is31fl3745_led_t PROGMEM g_is31fl3745_leds[IS31FL3745_LED_COUNT];
-
-void is31fl3745_init_drivers(void);
-void is31fl3745_init(uint8_t addr, uint8_t sync);
-void is31fl3745_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3745_select_page(uint8_t addr, uint8_t page);
-void is31fl3745_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3745_set_value(int index, uint8_t value);
-void is31fl3745_set_value_all(uint8_t value);
-
-void is31fl3745_set_scaling_register(uint8_t index, uint8_t value);
-
-void is31fl3745_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3745_update_scaling_registers(uint8_t addr, uint8_t index);
-
-void is31fl3745_flush(void);
-
-#define IS31FL3745_PDR_0_OHM 0b000          // No pull-down resistor
-#define IS31FL3745_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
-#define IS31FL3745_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
-#define IS31FL3745_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
-#define IS31FL3745_PDR_1K_OHM 0b100         // 1 kOhm resistor
-#define IS31FL3745_PDR_2K_OHM 0b101         // 2 kOhm resistor
-#define IS31FL3745_PDR_4K_OHM 0b110         // 4 kOhm resistor
-#define IS31FL3745_PDR_8K_OHM 0b111         // 8 kOhm resistor
-
-#define IS31FL3745_PUR_0_OHM 0b000          // No pull-up resistor
-#define IS31FL3745_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
-#define IS31FL3745_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
-#define IS31FL3745_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
-#define IS31FL3745_PUR_1K_OHM 0b100         // 1 kOhm resistor
-#define IS31FL3745_PUR_2K_OHM 0b101         // 2 kOhm resistor
-#define IS31FL3745_PUR_4K_OHM 0b110         // 4 kOhm resistor
-#define IS31FL3745_PUR_8K_OHM 0b111         // 8 kOhm resistor
-
-#define IS31FL3745_SYNC_NONE 0b00
-#define IS31FL3745_SYNC_SLAVE 0b10
-#define IS31FL3745_SYNC_MASTER 0b11
-
-#define CS1_SW1 0x00
-#define CS2_SW1 0x01
-#define CS3_SW1 0x02
-#define CS4_SW1 0x03
-#define CS5_SW1 0x04
-#define CS6_SW1 0x05
-#define CS7_SW1 0x06
-#define CS8_SW1 0x07
-#define CS9_SW1 0x08
-#define CS10_SW1 0x09
-#define CS11_SW1 0x0A
-#define CS12_SW1 0x0B
-#define CS13_SW1 0x0C
-#define CS14_SW1 0x0D
-#define CS15_SW1 0x0E
-#define CS16_SW1 0x0F
-#define CS17_SW1 0x10
-#define CS18_SW1 0x11
-
-#define CS1_SW2 0x12
-#define CS2_SW2 0x13
-#define CS3_SW2 0x14
-#define CS4_SW2 0x15
-#define CS5_SW2 0x16
-#define CS6_SW2 0x17
-#define CS7_SW2 0x18
-#define CS8_SW2 0x19
-#define CS9_SW2 0x1A
-#define CS10_SW2 0x1B
-#define CS11_SW2 0x1C
-#define CS12_SW2 0x1D
-#define CS13_SW2 0x1E
-#define CS14_SW2 0x1F
-#define CS15_SW2 0x20
-#define CS16_SW2 0x21
-#define CS17_SW2 0x22
-#define CS18_SW2 0x23
-
-#define CS1_SW3 0x24
-#define CS2_SW3 0x25
-#define CS3_SW3 0x26
-#define CS4_SW3 0x27
-#define CS5_SW3 0x28
-#define CS6_SW3 0x29
-#define CS7_SW3 0x2A
-#define CS8_SW3 0x2B
-#define CS9_SW3 0x2C
-#define CS10_SW3 0x2D
-#define CS11_SW3 0x2E
-#define CS12_SW3 0x2F
-#define CS13_SW3 0x30
-#define CS14_SW3 0x31
-#define CS15_SW3 0x32
-#define CS16_SW3 0x33
-#define CS17_SW3 0x34
-#define CS18_SW3 0x35
-
-#define CS1_SW4 0x36
-#define CS2_SW4 0x37
-#define CS3_SW4 0x38
-#define CS4_SW4 0x39
-#define CS5_SW4 0x3A
-#define CS6_SW4 0x3B
-#define CS7_SW4 0x3C
-#define CS8_SW4 0x3D
-#define CS9_SW4 0x3E
-#define CS10_SW4 0x3F
-#define CS11_SW4 0x40
-#define CS12_SW4 0x41
-#define CS13_SW4 0x42
-#define CS14_SW4 0x43
-#define CS15_SW4 0x44
-#define CS16_SW4 0x45
-#define CS17_SW4 0x46
-#define CS18_SW4 0x47
-
-#define CS1_SW5 0x48
-#define CS2_SW5 0x49
-#define CS3_SW5 0x4A
-#define CS4_SW5 0x4B
-#define CS5_SW5 0x4C
-#define CS6_SW5 0x4D
-#define CS7_SW5 0x4E
-#define CS8_SW5 0x4F
-#define CS9_SW5 0x50
-#define CS10_SW5 0x51
-#define CS11_SW5 0x52
-#define CS12_SW5 0x53
-#define CS13_SW5 0x54
-#define CS14_SW5 0x55
-#define CS15_SW5 0x56
-#define CS16_SW5 0x57
-#define CS17_SW5 0x58
-#define CS18_SW5 0x59
-
-#define CS1_SW6 0x5A
-#define CS2_SW6 0x5B
-#define CS3_SW6 0x5C
-#define CS4_SW6 0x5D
-#define CS5_SW6 0x5E
-#define CS6_SW6 0x5F
-#define CS7_SW6 0x60
-#define CS8_SW6 0x61
-#define CS9_SW6 0x62
-#define CS10_SW6 0x63
-#define CS11_SW6 0x64
-#define CS12_SW6 0x65
-#define CS13_SW6 0x66
-#define CS14_SW6 0x67
-#define CS15_SW6 0x68
-#define CS16_SW6 0x69
-#define CS17_SW6 0x6A
-#define CS18_SW6 0x6B
-
-#define CS1_SW7 0x6C
-#define CS2_SW7 0x6D
-#define CS3_SW7 0x6E
-#define CS4_SW7 0x6F
-#define CS5_SW7 0x70
-#define CS6_SW7 0x71
-#define CS7_SW7 0x72
-#define CS8_SW7 0x73
-#define CS9_SW7 0x74
-#define CS10_SW7 0x75
-#define CS11_SW7 0x76
-#define CS12_SW7 0x77
-#define CS13_SW7 0x78
-#define CS14_SW7 0x79
-#define CS15_SW7 0x7A
-#define CS16_SW7 0x7B
-#define CS17_SW7 0x7C
-#define CS18_SW7 0x7D
-
-#define CS1_SW8 0x7E
-#define CS2_SW8 0x7F
-#define CS3_SW8 0x80
-#define CS4_SW8 0x81
-#define CS5_SW8 0x82
-#define CS6_SW8 0x83
-#define CS7_SW8 0x84
-#define CS8_SW8 0x85
-#define CS9_SW8 0x86
-#define CS10_SW8 0x87
-#define CS11_SW8 0x88
-#define CS12_SW8 0x89
-#define CS13_SW8 0x8A
-#define CS14_SW8 0x8B
-#define CS15_SW8 0x8C
-#define CS16_SW8 0x8D
-#define CS17_SW8 0x8E
-#define CS18_SW8 0x8F
diff --git a/drivers/led/issi/is31fl3746a-mono.c b/drivers/led/issi/is31fl3746a-mono.c
new file mode 100644
index 0000000000..e0c29f3bd3
--- /dev/null
+++ b/drivers/led/issi/is31fl3746a-mono.c
@@ -0,0 +1,208 @@
+#include "is31fl3746a-mono.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "wait.h"
+
+#define IS31FL3746A_PWM_REGISTER_COUNT 72
+#define IS31FL3746A_SCALING_REGISTER_COUNT 72
+
+#ifndef IS31FL3746A_I2C_TIMEOUT
+#    define IS31FL3746A_I2C_TIMEOUT 100
+#endif
+
+#ifndef IS31FL3746A_I2C_PERSISTENCE
+#    define IS31FL3746A_I2C_PERSISTENCE 0
+#endif
+
+#ifndef IS31FL3746A_CONFIGURATION
+#    define IS31FL3746A_CONFIGURATION 0x01
+#endif
+
+#ifndef IS31FL3746A_PWM_FREQUENCY
+#    define IS31FL3746A_PWM_FREQUENCY IS31FL3746A_PWM_FREQUENCY_29K_HZ
+#endif
+
+#ifndef IS31FL3746A_SW_PULLDOWN
+#    define IS31FL3746A_SW_PULLDOWN IS31FL3746A_PDR_2K_OHM_SW_OFF
+#endif
+
+#ifndef IS31FL3746A_CS_PULLUP
+#    define IS31FL3746A_CS_PULLUP IS31FL3746A_PUR_2K_OHM_CS_OFF
+#endif
+
+#ifndef IS31FL3746A_GLOBAL_CURRENT
+#    define IS31FL3746A_GLOBAL_CURRENT 0xFF
+#endif
+
+uint8_t i2c_transfer_buffer[20] = {0xFF};
+
+uint8_t g_pwm_buffer[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[IS31FL3746A_DRIVER_COUNT]        = {false};
+bool    g_scaling_registers_update_required[IS31FL3746A_DRIVER_COUNT] = {false};
+
+uint8_t g_scaling_registers[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_SCALING_REGISTER_COUNT];
+
+void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if IS31FL3746A_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3746A_I2C_TIMEOUT) == 0) break;
+    }
+#else
+    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3746A_I2C_TIMEOUT);
+#endif
+}
+
+void is31fl3746a_select_page(uint8_t addr, uint8_t page) {
+    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
+    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND, page);
+}
+
+void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes page 0 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i + 1;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
+
+#if IS31FL3746A_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3746A_I2C_TIMEOUT) != 0) break;
+        }
+#else
+        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3746A_I2C_TIMEOUT);
+#endif
+    }
+}
+
+void is31fl3746a_init_drivers(void) {
+    i2c_init();
+
+    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_1);
+#if defined(IS31FL3746A_I2C_ADDRESS_2)
+    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_2);
+#    if defined(IS31FL3746A_I2C_ADDRESS_3)
+    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_3);
+#        if defined(IS31FL3746A_I2C_ADDRESS_4)
+    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
+        is31fl3746a_set_scaling_register(i, 0xFF);
+    }
+
+    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3746A_I2C_ADDRESS_2)
+    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3746A_I2C_ADDRESS_3)
+    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3746A_I2C_ADDRESS_4)
+    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void is31fl3746a_init(uint8_t addr) {
+    // In order to avoid the LEDs being driven with garbage data
+    // in the LED driver's PWM registers, shutdown is enabled last.
+    // Set up the mode and other settings, clear the PWM registers,
+    // then disable software shutdown.
+
+    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
+
+    // Turn off all LEDs.
+    for (int i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
+        is31fl3746a_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
+
+    for (int i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i++) {
+        is31fl3746a_write_register(addr, i + 1, 0x00);
+    }
+
+    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_FUNCTION);
+
+    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
+    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
+    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
+    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
+    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
+
+    // Wait 10ms to ensure the device has woken up.
+    wait_ms(10);
+}
+
+void is31fl3746a_set_color(int index, uint8_t value) {
+    is31fl3746a_led_t led;
+    if (index >= 0 && index < IS31FL3746A_LED_COUNT) {
+        memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer_update_required[led.driver] = true;
+        g_pwm_buffer[led.driver][led.v]          = value;
+    }
+}
+
+void is31fl3746a_set_value_all(uint8_t value) {
+    for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
+        is31fl3746a_set_value(i, value);
+    }
+}
+
+void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value) {
+    is31fl3746a_led_t led;
+    memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));
+
+    g_scaling_registers[led.driver][led.v] = value;
+
+    g_scaling_registers_update_required[led.driver] = true;
+}
+
+void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
+
+        is31fl3746a_write_pwm_buffer(addr, g_pwm_buffer[index]);
+    }
+
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index) {
+    if (g_scaling_registers_update_required[index]) {
+        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
+
+        for (int i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
+            is31fl3746a_write_register(addr, i + 1, g_scaling_registers[index][i]);
+        }
+        g_scaling_registers_update_required[index] = false;
+    }
+}
+
+void is31fl3746a_flush(void) {
+    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_1, 0);
+#if defined(IS31FL3746A_I2C_ADDRESS_2)
+    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_2, 1);
+#    if defined(IS31FL3746A_I2C_ADDRESS_3)
+    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_3, 2);
+#        if defined(IS31FL3746A_I2C_ADDRESS_4)
+    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
diff --git a/drivers/led/issi/is31fl3746a-mono.h b/drivers/led/issi/is31fl3746a-mono.h
new file mode 100644
index 0000000000..eda644ad19
--- /dev/null
+++ b/drivers/led/issi/is31fl3746a-mono.h
@@ -0,0 +1,192 @@
+/* Copyright 2017 Jason Williams
+ * Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ * Copyright 2020 MelGeek
+ * Copyright 2021 MasterSpoon
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+#define IS31FL3746A_REG_ID 0xFC
+
+#define IS31FL3746A_REG_COMMAND 0xFD
+
+#define IS31FL3746A_COMMAND_PWM 0x00
+#define IS31FL3746A_COMMAND_SCALING 0x01
+#define IS31FL3746A_COMMAND_FUNCTION 0x01
+
+#define IS31FL3746A_FUNCTION_REG_CONFIGURATION 0x50
+#define IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT 0x51
+#define IS31FL3746A_FUNCTION_REG_PULLDOWNUP 0x52
+#define IS31FL3746A_FUNCTION_REG_TEMPERATURE 0x5F
+#define IS31FL3746A_FUNCTION_REG_SPREAD_SPECTRUM 0x60
+#define IS31FL3746A_FUNCTION_REG_RESET 0x8F
+#define IS31FL3746A_FUNCTION_REG_PWM_ENABLE 0xE0
+#define IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY 0xE2
+
+#define IS31FL3746A_REG_COMMAND_WRITE_LOCK 0xFE
+#define IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC 0xC5
+
+#define IS31FL3746A_I2C_ADDRESS_GND_GND 0x60
+#define IS31FL3746A_I2C_ADDRESS_GND_SCL 0x61
+#define IS31FL3746A_I2C_ADDRESS_GND_SDA 0x62
+#define IS31FL3746A_I2C_ADDRESS_GND_VCC 0x63
+#define IS31FL3746A_I2C_ADDRESS_SCL_GND 0x64
+#define IS31FL3746A_I2C_ADDRESS_SCL_SCL 0x65
+#define IS31FL3746A_I2C_ADDRESS_SCL_SDA 0x66
+#define IS31FL3746A_I2C_ADDRESS_SCL_VCC 0x67
+#define IS31FL3746A_I2C_ADDRESS_SDA_GND 0x68
+#define IS31FL3746A_I2C_ADDRESS_SDA_SCL 0x69
+#define IS31FL3746A_I2C_ADDRESS_SDA_SDA 0x6A
+#define IS31FL3746A_I2C_ADDRESS_SDA_VCC 0x6B
+#define IS31FL3746A_I2C_ADDRESS_VCC_GND 0x6C
+#define IS31FL3746A_I2C_ADDRESS_VCC_SCL 0x6D
+#define IS31FL3746A_I2C_ADDRESS_VCC_SDA 0x6E
+#define IS31FL3746A_I2C_ADDRESS_VCC_VCC 0x6F
+
+#if defined(LED_MATRIX_IS31FL3746A)
+#    define IS31FL3746A_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+typedef struct is31fl3746a_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED is31fl3746a_led_t;
+
+extern const is31fl3746a_led_t PROGMEM g_is31fl3746a_leds[IS31FL3746A_LED_COUNT];
+
+void is31fl3746a_init_drivers(void);
+void is31fl3746a_init(uint8_t addr, uint8_t sync);
+void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+void is31fl3746a_select_page(uint8_t addr, uint8_t page);
+void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void is31fl3746a_set_value(int index, uint8_t value);
+void is31fl3746a_set_value_all(uint8_t value);
+
+void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value);
+
+void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index);
+void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index);
+
+void is31fl3746a_flush(void);
+
+#define IS31FL3746A_PDR_0_OHM 0b000          // No pull-down resistor
+#define IS31FL3746A_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
+#define IS31FL3746A_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
+#define IS31FL3746A_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
+#define IS31FL3746A_PDR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3746A_PDR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3746A_PDR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3746A_PDR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3746A_PUR_0_OHM 0b000          // No pull-up resistor
+#define IS31FL3746A_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
+#define IS31FL3746A_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
+#define IS31FL3746A_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
+#define IS31FL3746A_PUR_1K_OHM 0b100         // 1 kOhm resistor
+#define IS31FL3746A_PUR_2K_OHM 0b101         // 2 kOhm resistor
+#define IS31FL3746A_PUR_4K_OHM 0b110         // 4 kOhm resistor
+#define IS31FL3746A_PUR_8K_OHM 0b111         // 8 kOhm resistor
+
+#define IS31FL3746A_PWM_FREQUENCY_29K_HZ 0b000
+#define IS31FL3746A_PWM_FREQUENCY_14K5_HZ 0b001
+#define IS31FL3746A_PWM_FREQUENCY_7K25_HZ 0b010
+#define IS31FL3746A_PWM_FREQUENCY_3K63_HZ 0b011
+#define IS31FL3746A_PWM_FREQUENCY_1K81_HZ 0b100
+#define IS31FL3746A_PWM_FREQUENCY_906_HZ 0b101
+#define IS31FL3746A_PWM_FREQUENCY_453_HZ 0b110
+
+#define CS1_SW1 0x00
+#define CS2_SW1 0x01
+#define CS3_SW1 0x02
+#define CS4_SW1 0x03
+#define CS5_SW1 0x04
+#define CS6_SW1 0x05
+#define CS7_SW1 0x06
+#define CS8_SW1 0x07
+#define CS9_SW1 0x08
+#define CS10_SW1 0x09
+#define CS11_SW1 0x0A
+#define CS12_SW1 0x0B
+#define CS13_SW1 0x0C
+#define CS14_SW1 0x0D
+#define CS15_SW1 0x0E
+#define CS16_SW1 0x0F
+#define CS17_SW1 0x10
+#define CS18_SW1 0x11
+
+#define CS1_SW2 0x12
+#define CS2_SW2 0x13
+#define CS3_SW2 0x14
+#define CS4_SW2 0x15
+#define CS5_SW2 0x16
+#define CS6_SW2 0x17
+#define CS7_SW2 0x18
+#define CS8_SW2 0x19
+#define CS9_SW2 0x1A
+#define CS10_SW2 0x1B
+#define CS11_SW2 0x1C
+#define CS12_SW2 0x1D
+#define CS13_SW2 0x1E
+#define CS14_SW2 0x1F
+#define CS15_SW2 0x20
+#define CS16_SW2 0x21
+#define CS17_SW2 0x22
+#define CS18_SW2 0x23
+
+#define CS1_SW3 0x24
+#define CS2_SW3 0x25
+#define CS3_SW3 0x26
+#define CS4_SW3 0x27
+#define CS5_SW3 0x28
+#define CS6_SW3 0x29
+#define CS7_SW3 0x2A
+#define CS8_SW3 0x2B
+#define CS9_SW3 0x2C
+#define CS10_SW3 0x2D
+#define CS11_SW3 0x2E
+#define CS12_SW3 0x2F
+#define CS13_SW3 0x30
+#define CS14_SW3 0x31
+#define CS15_SW3 0x32
+#define CS16_SW3 0x33
+#define CS17_SW3 0x34
+#define CS18_SW3 0x35
+
+#define CS1_SW4 0x36
+#define CS2_SW4 0x37
+#define CS3_SW4 0x38
+#define CS4_SW4 0x39
+#define CS5_SW4 0x3A
+#define CS6_SW4 0x3B
+#define CS7_SW4 0x3C
+#define CS8_SW4 0x3D
+#define CS9_SW4 0x3E
+#define CS10_SW4 0x3F
+#define CS11_SW4 0x40
+#define CS12_SW4 0x41
+#define CS13_SW4 0x42
+#define CS14_SW4 0x43
+#define CS15_SW4 0x44
+#define CS16_SW4 0x45
+#define CS17_SW4 0x46
+#define CS18_SW4 0x47
diff --git a/drivers/led/issi/is31fl3746a-simple.c b/drivers/led/issi/is31fl3746a-simple.c
deleted file mode 100644
index 3a29c511cb..0000000000
--- a/drivers/led/issi/is31fl3746a-simple.c
+++ /dev/null
@@ -1,208 +0,0 @@
-#include "is31fl3746a-simple.h"
-#include <string.h>
-#include "i2c_master.h"
-#include "wait.h"
-
-#define IS31FL3746A_PWM_REGISTER_COUNT 72
-#define IS31FL3746A_SCALING_REGISTER_COUNT 72
-
-#ifndef IS31FL3746A_I2C_TIMEOUT
-#    define IS31FL3746A_I2C_TIMEOUT 100
-#endif
-
-#ifndef IS31FL3746A_I2C_PERSISTENCE
-#    define IS31FL3746A_I2C_PERSISTENCE 0
-#endif
-
-#ifndef IS31FL3746A_CONFIGURATION
-#    define IS31FL3746A_CONFIGURATION 0x01
-#endif
-
-#ifndef IS31FL3746A_PWM_FREQUENCY
-#    define IS31FL3746A_PWM_FREQUENCY IS31FL3746A_PWM_FREQUENCY_29K_HZ
-#endif
-
-#ifndef IS31FL3746A_SW_PULLDOWN
-#    define IS31FL3746A_SW_PULLDOWN IS31FL3746A_PDR_2K_OHM_SW_OFF
-#endif
-
-#ifndef IS31FL3746A_CS_PULLUP
-#    define IS31FL3746A_CS_PULLUP IS31FL3746A_PUR_2K_OHM_CS_OFF
-#endif
-
-#ifndef IS31FL3746A_GLOBAL_CURRENT
-#    define IS31FL3746A_GLOBAL_CURRENT 0xFF
-#endif
-
-uint8_t i2c_transfer_buffer[20] = {0xFF};
-
-uint8_t g_pwm_buffer[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[IS31FL3746A_DRIVER_COUNT]        = {false};
-bool    g_scaling_registers_update_required[IS31FL3746A_DRIVER_COUNT] = {false};
-
-uint8_t g_scaling_registers[IS31FL3746A_DRIVER_COUNT][IS31FL3746A_SCALING_REGISTER_COUNT];
-
-void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if IS31FL3746A_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3746A_I2C_TIMEOUT) == 0) break;
-    }
-#else
-    i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3746A_I2C_TIMEOUT);
-#endif
-}
-
-void is31fl3746a_select_page(uint8_t addr, uint8_t page) {
-    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
-    is31fl3746a_write_register(addr, IS31FL3746A_REG_COMMAND, page);
-}
-
-void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assumes page 0 is already selected.
-    // If any of the transactions fails function returns false.
-    // Transmit PWM registers in 12 transfers of 16 bytes.
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // Iterate over the pwm_buffer contents at 16 byte intervals.
-    for (int i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i + 1;
-        // Copy the data from i to i+15.
-        // Device will auto-increment register for data after the first byte
-        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
-        memcpy(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
-#if IS31FL3746A_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3746A_I2C_TIMEOUT) != 0) break;
-        }
-#else
-        i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3746A_I2C_TIMEOUT);
-#endif
-    }
-}
-
-void is31fl3746a_init_drivers(void) {
-    i2c_init();
-
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_1);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_2);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_3);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_init(IS31FL3746A_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
-        is31fl3746a_set_scaling_register(i, 0xFF);
-    }
-
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_update_scaling_registers(IS31FL3746A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void is31fl3746a_init(uint8_t addr) {
-    // In order to avoid the LEDs being driven with garbage data
-    // in the LED driver's PWM registers, shutdown is enabled last.
-    // Set up the mode and other settings, clear the PWM registers,
-    // then disable software shutdown.
-
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
-
-    // Turn off all LEDs.
-    for (int i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
-        is31fl3746a_write_register(addr, i + 1, 0x00);
-    }
-
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
-
-    for (int i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i++) {
-        is31fl3746a_write_register(addr, i + 1, 0x00);
-    }
-
-    is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_FUNCTION);
-
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
-    is31fl3746a_write_register(addr, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
-
-    // Wait 10ms to ensure the device has woken up.
-    wait_ms(10);
-}
-
-void is31fl3746a_set_color(int index, uint8_t value) {
-    is31fl3746a_led_t led;
-    if (index >= 0 && index < IS31FL3746A_LED_COUNT) {
-        memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer_update_required[led.driver] = true;
-        g_pwm_buffer[led.driver][led.v]          = value;
-    }
-}
-
-void is31fl3746a_set_value_all(uint8_t value) {
-    for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
-        is31fl3746a_set_value(i, value);
-    }
-}
-
-void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value) {
-    is31fl3746a_led_t led;
-    memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));
-
-    g_scaling_registers[led.driver][led.v] = value;
-
-    g_scaling_registers_update_required[led.driver] = true;
-}
-
-void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_PWM);
-
-        is31fl3746a_write_pwm_buffer(addr, g_pwm_buffer[index]);
-    }
-
-    g_pwm_buffer_update_required[index] = false;
-}
-
-void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index) {
-    if (g_scaling_registers_update_required[index]) {
-        is31fl3746a_select_page(addr, IS31FL3746A_COMMAND_SCALING);
-
-        for (int i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
-            is31fl3746a_write_register(addr, i + 1, g_scaling_registers[index][i]);
-        }
-        g_scaling_registers_update_required[index] = false;
-    }
-}
-
-void is31fl3746a_flush(void) {
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_1, 0);
-#if defined(IS31FL3746A_I2C_ADDRESS_2)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_2, 1);
-#    if defined(IS31FL3746A_I2C_ADDRESS_3)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_3, 2);
-#        if defined(IS31FL3746A_I2C_ADDRESS_4)
-    is31fl3746a_update_pwm_buffers(IS31FL3746A_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
diff --git a/drivers/led/issi/is31fl3746a-simple.h b/drivers/led/issi/is31fl3746a-simple.h
deleted file mode 100644
index eda644ad19..0000000000
--- a/drivers/led/issi/is31fl3746a-simple.h
+++ /dev/null
@@ -1,192 +0,0 @@
-/* Copyright 2017 Jason Williams
- * Copyright 2018 Jack Humbert
- * Copyright 2018 Yiancar
- * Copyright 2020 MelGeek
- * Copyright 2021 MasterSpoon
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-#define IS31FL3746A_REG_ID 0xFC
-
-#define IS31FL3746A_REG_COMMAND 0xFD
-
-#define IS31FL3746A_COMMAND_PWM 0x00
-#define IS31FL3746A_COMMAND_SCALING 0x01
-#define IS31FL3746A_COMMAND_FUNCTION 0x01
-
-#define IS31FL3746A_FUNCTION_REG_CONFIGURATION 0x50
-#define IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT 0x51
-#define IS31FL3746A_FUNCTION_REG_PULLDOWNUP 0x52
-#define IS31FL3746A_FUNCTION_REG_TEMPERATURE 0x5F
-#define IS31FL3746A_FUNCTION_REG_SPREAD_SPECTRUM 0x60
-#define IS31FL3746A_FUNCTION_REG_RESET 0x8F
-#define IS31FL3746A_FUNCTION_REG_PWM_ENABLE 0xE0
-#define IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY 0xE2
-
-#define IS31FL3746A_REG_COMMAND_WRITE_LOCK 0xFE
-#define IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC 0xC5
-
-#define IS31FL3746A_I2C_ADDRESS_GND_GND 0x60
-#define IS31FL3746A_I2C_ADDRESS_GND_SCL 0x61
-#define IS31FL3746A_I2C_ADDRESS_GND_SDA 0x62
-#define IS31FL3746A_I2C_ADDRESS_GND_VCC 0x63
-#define IS31FL3746A_I2C_ADDRESS_SCL_GND 0x64
-#define IS31FL3746A_I2C_ADDRESS_SCL_SCL 0x65
-#define IS31FL3746A_I2C_ADDRESS_SCL_SDA 0x66
-#define IS31FL3746A_I2C_ADDRESS_SCL_VCC 0x67
-#define IS31FL3746A_I2C_ADDRESS_SDA_GND 0x68
-#define IS31FL3746A_I2C_ADDRESS_SDA_SCL 0x69
-#define IS31FL3746A_I2C_ADDRESS_SDA_SDA 0x6A
-#define IS31FL3746A_I2C_ADDRESS_SDA_VCC 0x6B
-#define IS31FL3746A_I2C_ADDRESS_VCC_GND 0x6C
-#define IS31FL3746A_I2C_ADDRESS_VCC_SCL 0x6D
-#define IS31FL3746A_I2C_ADDRESS_VCC_SDA 0x6E
-#define IS31FL3746A_I2C_ADDRESS_VCC_VCC 0x6F
-
-#if defined(LED_MATRIX_IS31FL3746A)
-#    define IS31FL3746A_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-typedef struct is31fl3746a_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED is31fl3746a_led_t;
-
-extern const is31fl3746a_led_t PROGMEM g_is31fl3746a_leds[IS31FL3746A_LED_COUNT];
-
-void is31fl3746a_init_drivers(void);
-void is31fl3746a_init(uint8_t addr, uint8_t sync);
-void is31fl3746a_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-void is31fl3746a_select_page(uint8_t addr, uint8_t page);
-void is31fl3746a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void is31fl3746a_set_value(int index, uint8_t value);
-void is31fl3746a_set_value_all(uint8_t value);
-
-void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value);
-
-void is31fl3746a_update_pwm_buffers(uint8_t addr, uint8_t index);
-void is31fl3746a_update_scaling_registers(uint8_t addr, uint8_t index);
-
-void is31fl3746a_flush(void);
-
-#define IS31FL3746A_PDR_0_OHM 0b000          // No pull-down resistor
-#define IS31FL3746A_PDR_0K5_OHM_SW_OFF 0b001 // 0.5 kOhm resistor in SWx off time
-#define IS31FL3746A_PDR_1K_OHM_SW_OFF 0b010  // 1 kOhm resistor in SWx off time
-#define IS31FL3746A_PDR_2K_OHM_SW_OFF 0b011  // 2 kOhm resistor in SWx off time
-#define IS31FL3746A_PDR_1K_OHM 0b100         // 1 kOhm resistor
-#define IS31FL3746A_PDR_2K_OHM 0b101         // 2 kOhm resistor
-#define IS31FL3746A_PDR_4K_OHM 0b110         // 4 kOhm resistor
-#define IS31FL3746A_PDR_8K_OHM 0b111         // 8 kOhm resistor
-
-#define IS31FL3746A_PUR_0_OHM 0b000          // No pull-up resistor
-#define IS31FL3746A_PUR_0K5_OHM_CS_OFF 0b001 // 0.5 kOhm resistor in CSy off time
-#define IS31FL3746A_PUR_1K_OHM_CS_OFF 0b010  // 1 kOhm resistor in CSy off time
-#define IS31FL3746A_PUR_2K_OHM_CS_OFF 0b011  // 2 kOhm resistor in CSy off time
-#define IS31FL3746A_PUR_1K_OHM 0b100         // 1 kOhm resistor
-#define IS31FL3746A_PUR_2K_OHM 0b101         // 2 kOhm resistor
-#define IS31FL3746A_PUR_4K_OHM 0b110         // 4 kOhm resistor
-#define IS31FL3746A_PUR_8K_OHM 0b111         // 8 kOhm resistor
-
-#define IS31FL3746A_PWM_FREQUENCY_29K_HZ 0b000
-#define IS31FL3746A_PWM_FREQUENCY_14K5_HZ 0b001
-#define IS31FL3746A_PWM_FREQUENCY_7K25_HZ 0b010
-#define IS31FL3746A_PWM_FREQUENCY_3K63_HZ 0b011
-#define IS31FL3746A_PWM_FREQUENCY_1K81_HZ 0b100
-#define IS31FL3746A_PWM_FREQUENCY_906_HZ 0b101
-#define IS31FL3746A_PWM_FREQUENCY_453_HZ 0b110
-
-#define CS1_SW1 0x00
-#define CS2_SW1 0x01
-#define CS3_SW1 0x02
-#define CS4_SW1 0x03
-#define CS5_SW1 0x04
-#define CS6_SW1 0x05
-#define CS7_SW1 0x06
-#define CS8_SW1 0x07
-#define CS9_SW1 0x08
-#define CS10_SW1 0x09
-#define CS11_SW1 0x0A
-#define CS12_SW1 0x0B
-#define CS13_SW1 0x0C
-#define CS14_SW1 0x0D
-#define CS15_SW1 0x0E
-#define CS16_SW1 0x0F
-#define CS17_SW1 0x10
-#define CS18_SW1 0x11
-
-#define CS1_SW2 0x12
-#define CS2_SW2 0x13
-#define CS3_SW2 0x14
-#define CS4_SW2 0x15
-#define CS5_SW2 0x16
-#define CS6_SW2 0x17
-#define CS7_SW2 0x18
-#define CS8_SW2 0x19
-#define CS9_SW2 0x1A
-#define CS10_SW2 0x1B
-#define CS11_SW2 0x1C
-#define CS12_SW2 0x1D
-#define CS13_SW2 0x1E
-#define CS14_SW2 0x1F
-#define CS15_SW2 0x20
-#define CS16_SW2 0x21
-#define CS17_SW2 0x22
-#define CS18_SW2 0x23
-
-#define CS1_SW3 0x24
-#define CS2_SW3 0x25
-#define CS3_SW3 0x26
-#define CS4_SW3 0x27
-#define CS5_SW3 0x28
-#define CS6_SW3 0x29
-#define CS7_SW3 0x2A
-#define CS8_SW3 0x2B
-#define CS9_SW3 0x2C
-#define CS10_SW3 0x2D
-#define CS11_SW3 0x2E
-#define CS12_SW3 0x2F
-#define CS13_SW3 0x30
-#define CS14_SW3 0x31
-#define CS15_SW3 0x32
-#define CS16_SW3 0x33
-#define CS17_SW3 0x34
-#define CS18_SW3 0x35
-
-#define CS1_SW4 0x36
-#define CS2_SW4 0x37
-#define CS3_SW4 0x38
-#define CS4_SW4 0x39
-#define CS5_SW4 0x3A
-#define CS6_SW4 0x3B
-#define CS7_SW4 0x3C
-#define CS8_SW4 0x3D
-#define CS9_SW4 0x3E
-#define CS10_SW4 0x3F
-#define CS11_SW4 0x40
-#define CS12_SW4 0x41
-#define CS13_SW4 0x42
-#define CS14_SW4 0x43
-#define CS15_SW4 0x44
-#define CS16_SW4 0x45
-#define CS17_SW4 0x46
-#define CS18_SW4 0x47
diff --git a/drivers/led/snled27351-mono.c b/drivers/led/snled27351-mono.c
new file mode 100644
index 0000000000..4519243e0e
--- /dev/null
+++ b/drivers/led/snled27351-mono.c
@@ -0,0 +1,272 @@
+/* Copyright 2021 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "snled27351-mono.h"
+#include "i2c_master.h"
+
+#define SNLED27351_PWM_REGISTER_COUNT 192
+#define SNLED27351_LED_CONTROL_REGISTER_COUNT 24
+
+#ifndef SNLED27351_I2C_TIMEOUT
+#    define SNLED27351_I2C_TIMEOUT 100
+#endif
+
+#ifndef SNLED27351_I2C_PERSISTENCE
+#    define SNLED27351_I2C_PERSISTENCE 0
+#endif
+
+#ifndef SNLED27351_PHASE_CHANNEL
+#    define SNLED27351_PHASE_CHANNEL SNLED27351_SCAN_PHASE_12_CHANNEL
+#endif
+
+#ifndef SNLED27351_CURRENT_TUNE
+#    define SNLED27351_CURRENT_TUNE \
+        { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }
+#endif
+
+uint8_t i2c_transfer_buffer[20];
+
+// These buffers match the SNLED27351 PWM registers.
+// The control buffers match the PG0 LED On/Off registers.
+// Storing them like this is optimal for I2C transfers to the registers.
+// We could optimize this and take out the unused registers from these
+// buffers and the transfers in snled27351_write_pwm_buffer() but it's
+// probably not worth the extra complexity.
+uint8_t g_pwm_buffer[SNLED27351_DRIVER_COUNT][SNLED27351_PWM_REGISTER_COUNT];
+bool    g_pwm_buffer_update_required[SNLED27351_DRIVER_COUNT] = {false};
+
+uint8_t g_led_control_registers[SNLED27351_DRIVER_COUNT][SNLED27351_LED_CONTROL_REGISTER_COUNT] = {0};
+bool    g_led_control_registers_update_required[SNLED27351_DRIVER_COUNT]                        = {false};
+
+bool snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
+    // If the transaction fails function returns false.
+    i2c_transfer_buffer[0] = reg;
+    i2c_transfer_buffer[1] = data;
+
+#if SNLED27351_I2C_PERSISTENCE > 0
+    for (uint8_t i = 0; i < SNLED27351_I2C_PERSISTENCE; i++) {
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, SNLED27351_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+    }
+#else
+    if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, SNLED27351_I2C_TIMEOUT) != 0) {
+        return false;
+    }
+#endif
+    return true;
+}
+
+void snled27351_select_page(uint8_t addr, uint8_t page) {
+    snled27351_write_register(addr, SNLED27351_REG_COMMAND, page);
+}
+
+bool snled27351_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
+    // Assumes PG1 is already selected.
+    // If any of the transactions fails function returns false.
+    // Transmit PWM registers in 12 transfers of 16 bytes.
+    // i2c_transfer_buffer[] is 20 bytes
+
+    // Iterate over the pwm_buffer contents at 16 byte intervals.
+    for (int i = 0; i < SNLED27351_PWM_REGISTER_COUNT; i += 16) {
+        i2c_transfer_buffer[0] = i;
+        // Copy the data from i to i+15.
+        // Device will auto-increment register for data after the first byte
+        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
+        for (int j = 0; j < 16; j++) {
+            i2c_transfer_buffer[1 + j] = pwm_buffer[i + j];
+        }
+
+#if SNLED27351_I2C_PERSISTENCE > 0
+        for (uint8_t i = 0; i < SNLED27351_I2C_PERSISTENCE; i++) {
+            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, SNLED27351_I2C_TIMEOUT) != 0) {
+                return false;
+            }
+        }
+#else
+        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, SNLED27351_I2C_TIMEOUT) != 0) {
+            return false;
+        }
+#endif
+    }
+    return true;
+}
+
+void snled27351_init_drivers(void) {
+    i2c_init();
+
+    snled27351_init(SNLED27351_I2C_ADDRESS_1);
+#if defined(SNLED27351_I2C_ADDRESS_2)
+    snled27351_init(SNLED27351_I2C_ADDRESS_2);
+#    if defined(SNLED27351_I2C_ADDRESS_3)
+    snled27351_init(SNLED27351_I2C_ADDRESS_3);
+#        if defined(SNLED27351_I2C_ADDRESS_4)
+    snled27351_init(SNLED27351_I2C_ADDRESS_4);
+#        endif
+#    endif
+#endif
+
+    for (int i = 0; i < SNLED27351_LED_COUNT; i++) {
+        snled27351_set_led_control_register(i, true);
+    }
+
+    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_1, 0);
+#if defined(SNLED27351_I2C_ADDRESS_2)
+    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_2, 1);
+#    if defined(SNLED27351_I2C_ADDRESS_3)
+    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_3, 2);
+#        if defined(SNLED27351_I2C_ADDRESS_4)
+    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void snled27351_init(uint8_t addr) {
+    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+
+    // Setting LED driver to shutdown mode
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
+    // Setting internal channel pulldown/pullup
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_PULLDOWNUP, SNLED27351_PULLDOWNUP_ALL_ENABLED);
+    // Select number of scan phase
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SCAN_PHASE, SNLED27351_PHASE_CHANNEL);
+    // Setting PWM Delay Phase
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1, SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE);
+    // Setting Driving/Sinking Channel Slew Rate
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2, SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE | SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE);
+    // Setting Iref
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, 0);
+
+    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+
+    for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
+        snled27351_write_register(addr, i, 0x00);
+    }
+
+    snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
+
+    for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
+        snled27351_write_register(addr, i, 0x00);
+    }
+
+    snled27351_select_page(addr, SNLED27351_COMMAND_CURRENT_TUNE);
+
+    uint8_t current_tune_reg_list[SNLED27351_LED_CURRENT_TUNE_LENGTH] = SNLED27351_CURRENT_TUNE;
+    for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
+        snled27351_write_register(addr, i, current_tune_reg_list[i]);
+    }
+
+    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+
+    // Enable LEDs ON/OFF
+    for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
+        snled27351_write_register(addr, i, 0xFF);
+    }
+
+    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+
+    // Setting LED driver to normal mode
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
+}
+
+void snled27351_set_value(int index, uint8_t value) {
+    snled27351_led_t led;
+    if (index >= 0 && index < SNLED27351_LED_COUNT) {
+        memcpy_P(&led, (&g_snled27351_leds[index]), sizeof(led));
+
+        if (g_pwm_buffer[led.driver][led.v] == value) {
+            return;
+        }
+        g_pwm_buffer[led.driver][led.v]          = value;
+        g_pwm_buffer_update_required[led.driver] = true;
+    }
+}
+
+void snled27351_set_value_all(uint8_t value) {
+    for (int i = 0; i < SNLED27351_LED_COUNT; i++) {
+        snled27351_set_value(i, value);
+    }
+}
+
+void snled27351_set_led_control_register(uint8_t index, bool value) {
+    snled27351_led_t led;
+    memcpy_P(&led, (&g_snled27351_leds[index]), sizeof(led));
+
+    uint8_t control_register = led.v / 8;
+    uint8_t bit_value        = led.v % 8;
+
+    if (value) {
+        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
+    } else {
+        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
+    }
+
+    g_led_control_registers_update_required[led.driver] = true;
+}
+
+void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index) {
+    if (g_pwm_buffer_update_required[index]) {
+        snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
+
+        // If any of the transactions fail we risk writing dirty PG0,
+        // refresh page 0 just in case.
+        if (!snled27351_write_pwm_buffer(addr, g_pwm_buffer[index])) {
+            g_led_control_registers_update_required[index] = true;
+        }
+    }
+    g_pwm_buffer_update_required[index] = false;
+}
+
+void snled27351_update_led_control_registers(uint8_t addr, uint8_t index) {
+    if (g_led_control_registers_update_required[index]) {
+        snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
+
+        for (int i = 0; i < SNLED27351_LED_CONTROL_REGISTER_COUNT; i++) {
+            snled27351_write_register(addr, i, g_led_control_registers[index][i]);
+        }
+    }
+    g_led_control_registers_update_required[index] = false;
+}
+
+void snled27351_flush(void) {
+    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_1, 0);
+#if defined(SNLED27351_I2C_ADDRESS_2)
+    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_2, 1);
+#    if defined(SNLED27351_I2C_ADDRESS_3)
+    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_3, 2);
+#        if defined(SNLED27351_I2C_ADDRESS_4)
+    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_4, 3);
+#        endif
+#    endif
+#endif
+}
+
+void snled27351_sw_return_normal(uint8_t addr) {
+    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+
+    // Setting LED driver to normal mode
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
+}
+
+void snled27351_sw_shutdown(uint8_t addr) {
+    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
+
+    // Setting LED driver to shutdown mode
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
+    // Write SW Sleep Register
+    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, SNLED27351_SOFTWARE_SLEEP_ENABLE);
+}
diff --git a/drivers/led/snled27351-mono.h b/drivers/led/snled27351-mono.h
new file mode 100644
index 0000000000..0a4d2469f0
--- /dev/null
+++ b/drivers/led/snled27351-mono.h
@@ -0,0 +1,381 @@
+/* Copyright 2021 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "progmem.h"
+#include "util.h"
+
+// ======== DEPRECATED DEFINES - DO NOT USE ========
+#ifdef CKLED2001_TIMEOUT
+#    define SNLED27351_I2C_TIMEOUT CKLED2001_TIMEOUT
+#endif
+#ifdef CKLED2001_PERSISTENCE
+#    define SNLED27351_I2C_PERSISTENCE CKLED2001_PERSISTENCE
+#endif
+#ifdef PHASE_CHANNEL
+#    define SNLED27351_PHASE_CHANNEL PHASE_CHANNEL
+#endif
+#ifdef CKLED2001_CURRENT_TUNE
+#    define SNLED27351_CURRENT_TUNE CKLED2001_CURRENT_TUNE
+#endif
+
+#define MSKPHASE_12CHANNEL SNLED27351_SCAN_PHASE_12_CHANNEL
+#define MSKPHASE_11CHANNEL SNLED27351_SCAN_PHASE_11_CHANNEL
+#define MSKPHASE_10CHANNEL SNLED27351_SCAN_PHASE_10_CHANNEL
+#define MSKPHASE_9CHANNEL SNLED27351_SCAN_PHASE_9_CHANNEL
+#define MSKPHASE_8CHANNEL SNLED27351_SCAN_PHASE_8_CHANNEL
+#define MSKPHASE_7CHANNEL SNLED27351_SCAN_PHASE_7_CHANNEL
+#define MSKPHASE_6CHANNEL SNLED27351_SCAN_PHASE_6_CHANNEL
+#define MSKPHASE_5CHANNEL SNLED27351_SCAN_PHASE_5_CHANNEL
+#define MSKPHASE_4CHANNEL SNLED27351_SCAN_PHASE_4_CHANNEL
+#define MSKPHASE_3CHANNEL SNLED27351_SCAN_PHASE_3_CHANNEL
+#define MSKPHASE_2CHANNEL SNLED27351_SCAN_PHASE_2_CHANNEL
+#define MSKPHASE_1CHANNEL SNLED27351_SCAN_PHASE_1_CHANNEL
+
+#define ckled2001_led snled27351_led_t
+#define g_ckled2001_leds g_snled27351_leds
+// ========
+
+#define SNLED27351_REG_COMMAND 0xFD
+#define SNLED27351_COMMAND_LED_CONTROL 0x00
+#define SNLED27351_COMMAND_PWM 0x01
+#define SNLED27351_COMMAND_FUNCTION 0x03
+#define SNLED27351_COMMAND_CURRENT_TUNE 0x04
+
+#define SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN 0x00
+#define SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN (0x0 << 0)
+#define SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL (0x1 << 0)
+
+#define SNLED27351_FUNCTION_REG_ID 0x11
+#define SNLED27351_DRIVER_ID 0x8A
+
+#define SNLED27351_FUNCTION_REG_PULLDOWNUP 0x13
+#define SNLED27351_PULLDOWNUP_ALL_ENABLED 0xAA
+
+#define SNLED27351_FUNCTION_REG_SCAN_PHASE 0x14
+#define SNLED27351_SCAN_PHASE_12_CHANNEL 0x00
+#define SNLED27351_SCAN_PHASE_11_CHANNEL 0x01
+#define SNLED27351_SCAN_PHASE_10_CHANNEL 0x02
+#define SNLED27351_SCAN_PHASE_9_CHANNEL 0x03
+#define SNLED27351_SCAN_PHASE_8_CHANNEL 0x04
+#define SNLED27351_SCAN_PHASE_7_CHANNEL 0x05
+#define SNLED27351_SCAN_PHASE_6_CHANNEL 0x06
+#define SNLED27351_SCAN_PHASE_5_CHANNEL 0x07
+#define SNLED27351_SCAN_PHASE_4_CHANNEL 0x08
+#define SNLED27351_SCAN_PHASE_3_CHANNEL 0x09
+#define SNLED27351_SCAN_PHASE_2_CHANNEL 0x0A
+#define SNLED27351_SCAN_PHASE_1_CHANNEL 0x0B
+
+#define SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1 0x15
+#define SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE (0b1 << 2)
+
+#define SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2 0x16
+#define SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE (0b1 << 6)
+#define SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE (0b1 << 7)
+
+#define SNLED27351_FUNCTION_REG_OPEN_SHORT_ENABLE 0x17
+#define SNLED27351_OPEN_SHORT_ENABLE_SDS_ENABLE (0b1 << 6)
+#define SNLED27351_OPEN_SHORT_ENABLE_ODS_ENABLE (0b1 << 7)
+
+#define SNLED27351_FUNCTION_REG_OPEN_SHORT_DUTY 0x18
+
+#define SNLED27351_FUNCTION_REG_OPEN_SHORT_FLAG 0x19
+#define SNLED27351_OPEN_SHORT_FLAG_OSINT_ENABLE (0b1 << 6)
+#define SNLED27351_OPEN_SHORT_FLAG_ODINT_ENABLE (0b1 << 7)
+
+#define SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP 0x1A
+#define SNLED27351_SOFTWARE_SLEEP_ENABLE (0b1 << 1)
+
+// LED Control Registers
+#define SNLED27351_LED_CONTROL_ON_OFF_FIRST_ADDR 0x0
+#define SNLED27351_LED_CONTROL_ON_OFF_LAST_ADDR 0x17
+#define SNLED27351_LED_CONTROL_ON_OFF_LENGTH ((SNLED27351_LED_CONTROL_ON_OFF_LAST_ADDR - SNLED27351_LED_CONTROL_ON_OFF_FIRST_ADDR) + 1)
+
+#define SNLED27351_LED_CONTROL_OPEN_FIRST_ADDR 0x18
+#define SNLED27351_LED_CONTROL_OPEN_LAST_ADDR 0x2F
+#define SNLED27351_LED_CONTROL_OPEN_LENGTH ((SNLED27351_LED_CONTROL_OPEN_LAST_ADDR - SNLED27351_LED_CONTROL_OPEN_FIRST_ADDR) + 1)
+
+#define SNLED27351_LED_CONTROL_SHORT_FIRST_ADDR 0x30
+#define SNLED27351_LED_CONTROL_SHORT_LAST_ADDR 0x47
+#define SNLED27351_LED_CONTROL_SHORT_LENGTH ((SNLED27351_LED_CONTROL_SHORT_LAST_ADDR - SNLED27351_LED_CONTROL_SHORT_FIRST_ADDR) + 1)
+
+#define SNLED27351_LED_CONTROL_PAGE_LENGTH 0x48
+
+// LED Control Registers
+#define SNLED27351_LED_PWM_FIRST_ADDR 0x00
+#define SNLED27351_LED_PWM_LAST_ADDR 0xBF
+#define SNLED27351_LED_PWM_LENGTH 0xC0
+
+// Current Tune Registers
+#define SNLED27351_LED_CURRENT_TUNE_FIRST_ADDR 0x00
+#define SNLED27351_LED_CURRENT_TUNE_LAST_ADDR 0x0B
+#define SNLED27351_LED_CURRENT_TUNE_LENGTH 0x0C
+
+#define SNLED27351_I2C_ADDRESS_GND 0x74
+#define SNLED27351_I2C_ADDRESS_SCL 0x75
+#define SNLED27351_I2C_ADDRESS_SDA 0x76
+#define SNLED27351_I2C_ADDRESS_VDDIO 0x77
+
+#if defined(LED_MATRIX_SNLED27351)
+#    define SNLED27351_LED_COUNT LED_MATRIX_LED_COUNT
+#endif
+
+#if defined(SNLED27351_I2C_ADDRESS_4)
+#    define SNLED27351_DRIVER_COUNT 4
+#elif defined(SNLED27351_I2C_ADDRESS_3)
+#    define SNLED27351_DRIVER_COUNT 3
+#elif defined(SNLED27351_I2C_ADDRESS_2)
+#    define SNLED27351_DRIVER_COUNT 2
+#elif defined(SNLED27351_I2C_ADDRESS_1)
+#    define SNLED27351_DRIVER_COUNT 1
+#endif
+
+typedef struct snled27351_led_t {
+    uint8_t driver : 2;
+    uint8_t v;
+} PACKED snled27351_led_t;
+
+extern const snled27351_led_t PROGMEM g_snled27351_leds[SNLED27351_LED_COUNT];
+
+void snled27351_init_drivers(void);
+void snled27351_init(uint8_t addr);
+void snled27351_select_page(uint8_t addr, uint8_t page);
+bool snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data);
+bool snled27351_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
+
+void snled27351_set_value(int index, uint8_t value);
+void snled27351_set_value_all(uint8_t value);
+
+void snled27351_set_led_control_register(uint8_t index, bool value);
+
+// This should not be called from an interrupt
+// (eg. from a timer interrupt).
+// Call this while idle (in between matrix scans).
+// If the buffer is dirty, it will update the driver with the buffer.
+void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index);
+void snled27351_update_led_control_registers(uint8_t addr, uint8_t index);
+
+void snled27351_flush(void);
+
+void snled27351_sw_return_normal(uint8_t addr);
+void snled27351_sw_shutdown(uint8_t addr);
+
+#define A_1 0x00
+#define A_2 0x01
+#define A_3 0x02
+#define A_4 0x03
+#define A_5 0x04
+#define A_6 0x05
+#define A_7 0x06
+#define A_8 0x07
+#define A_9 0x08
+#define A_10 0x09
+#define A_11 0x0A
+#define A_12 0x0B
+#define A_13 0x0C
+#define A_14 0x0D
+#define A_15 0x0E
+#define A_16 0x0F
+
+#define B_1 0x10
+#define B_2 0x11
+#define B_3 0x12
+#define B_4 0x13
+#define B_5 0x14
+#define B_6 0x15
+#define B_7 0x16
+#define B_8 0x17
+#define B_9 0x18
+#define B_10 0x19
+#define B_11 0x1A
+#define B_12 0x1B
+#define B_13 0x1C
+#define B_14 0x1D
+#define B_15 0x1E
+#define B_16 0x1F
+
+#define C_1 0x20
+#define C_2 0x21
+#define C_3 0x22
+#define C_4 0x23
+#define C_5 0x24
+#define C_6 0x25
+#define C_7 0x26
+#define C_8 0x27
+#define C_9 0x28
+#define C_10 0x29
+#define C_11 0x2A
+#define C_12 0x2B
+#define C_13 0x2C
+#define C_14 0x2D
+#define C_15 0x2E
+#define C_16 0x2F
+
+#define D_1 0x30
+#define D_2 0x31
+#define D_3 0x32
+#define D_4 0x33
+#define D_5 0x34
+#define D_6 0x35
+#define D_7 0x36
+#define D_8 0x37
+#define D_9 0x38
+#define D_10 0x39
+#define D_11 0x3A
+#define D_12 0x3B
+#define D_13 0x3C
+#define D_14 0x3D
+#define D_15 0x3E
+#define D_16 0x3F
+
+#define E_1 0x40
+#define E_2 0x41
+#define E_3 0x42
+#define E_4 0x43
+#define E_5 0x44
+#define E_6 0x45
+#define E_7 0x46
+#define E_8 0x47
+#define E_9 0x48
+#define E_10 0x49
+#define E_11 0x4A
+#define E_12 0x4B
+#define E_13 0x4C
+#define E_14 0x4D
+#define E_15 0x4E
+#define E_16 0x4F
+
+#define F_1 0x50
+#define F_2 0x51
+#define F_3 0x52
+#define F_4 0x53
+#define F_5 0x54
+#define F_6 0x55
+#define F_7 0x56
+#define F_8 0x57
+#define F_9 0x58
+#define F_10 0x59
+#define F_11 0x5A
+#define F_12 0x5B
+#define F_13 0x5C
+#define F_14 0x5D
+#define F_15 0x5E
+#define F_16 0x5F
+
+#define G_1 0x60
+#define G_2 0x61
+#define G_3 0x62
+#define G_4 0x63
+#define G_5 0x64
+#define G_6 0x65
+#define G_7 0x66
+#define G_8 0x67
+#define G_9 0x68
+#define G_10 0x69
+#define G_11 0x6A
+#define G_12 0x6B
+#define G_13 0x6C
+#define G_14 0x6D
+#define G_15 0x6E
+#define G_16 0x6F
+
+#define H_1 0x70
+#define H_2 0x71
+#define H_3 0x72
+#define H_4 0x73
+#define H_5 0x74
+#define H_6 0x75
+#define H_7 0x76
+#define H_8 0x77
+#define H_9 0x78
+#define H_10 0x79
+#define H_11 0x7A
+#define H_12 0x7B
+#define H_13 0x7C
+#define H_14 0x7D
+#define H_15 0x7E
+#define H_16 0x7F
+
+#define I_1 0x80
+#define I_2 0x81
+#define I_3 0x82
+#define I_4 0x83
+#define I_5 0x84
+#define I_6 0x85
+#define I_7 0x86
+#define I_8 0x87
+#define I_9 0x88
+#define I_10 0x89
+#define I_11 0x8A
+#define I_12 0x8B
+#define I_13 0x8C
+#define I_14 0x8D
+#define I_15 0x8E
+#define I_16 0x8F
+
+#define J_1 0x90
+#define J_2 0x91
+#define J_3 0x92
+#define J_4 0x93
+#define J_5 0x94
+#define J_6 0x95
+#define J_7 0x96
+#define J_8 0x97
+#define J_9 0x98
+#define J_10 0x99
+#define J_11 0x9A
+#define J_12 0x9B
+#define J_13 0x9C
+#define J_14 0x9D
+#define J_15 0x9E
+#define J_16 0x9F
+
+#define K_1 0xA0
+#define K_2 0xA1
+#define K_3 0xA2
+#define K_4 0xA3
+#define K_5 0xA4
+#define K_6 0xA5
+#define K_7 0xA6
+#define K_8 0xA7
+#define K_9 0xA8
+#define K_10 0xA9
+#define K_11 0xAA
+#define K_12 0xAB
+#define K_13 0xAC
+#define K_14 0xAD
+#define K_15 0xAE
+#define K_16 0xAF
+
+#define L_1 0xB0
+#define L_2 0xB1
+#define L_3 0xB2
+#define L_4 0xB3
+#define L_5 0xB4
+#define L_6 0xB5
+#define L_7 0xB6
+#define L_8 0xB7
+#define L_9 0xB8
+#define L_10 0xB9
+#define L_11 0xBA
+#define L_12 0xBB
+#define L_13 0xBC
+#define L_14 0xBD
+#define L_15 0xBE
+#define L_16 0xBF
diff --git a/drivers/led/snled27351-simple.c b/drivers/led/snled27351-simple.c
deleted file mode 100644
index 7b7a82f90f..0000000000
--- a/drivers/led/snled27351-simple.c
+++ /dev/null
@@ -1,272 +0,0 @@
-/* Copyright 2021 @ Keychron (https://www.keychron.com)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "snled27351-simple.h"
-#include "i2c_master.h"
-
-#define SNLED27351_PWM_REGISTER_COUNT 192
-#define SNLED27351_LED_CONTROL_REGISTER_COUNT 24
-
-#ifndef SNLED27351_I2C_TIMEOUT
-#    define SNLED27351_I2C_TIMEOUT 100
-#endif
-
-#ifndef SNLED27351_I2C_PERSISTENCE
-#    define SNLED27351_I2C_PERSISTENCE 0
-#endif
-
-#ifndef SNLED27351_PHASE_CHANNEL
-#    define SNLED27351_PHASE_CHANNEL SNLED27351_SCAN_PHASE_12_CHANNEL
-#endif
-
-#ifndef SNLED27351_CURRENT_TUNE
-#    define SNLED27351_CURRENT_TUNE \
-        { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }
-#endif
-
-uint8_t i2c_transfer_buffer[20];
-
-// These buffers match the SNLED27351 PWM registers.
-// The control buffers match the PG0 LED On/Off registers.
-// Storing them like this is optimal for I2C transfers to the registers.
-// We could optimize this and take out the unused registers from these
-// buffers and the transfers in snled27351_write_pwm_buffer() but it's
-// probably not worth the extra complexity.
-uint8_t g_pwm_buffer[SNLED27351_DRIVER_COUNT][SNLED27351_PWM_REGISTER_COUNT];
-bool    g_pwm_buffer_update_required[SNLED27351_DRIVER_COUNT] = {false};
-
-uint8_t g_led_control_registers[SNLED27351_DRIVER_COUNT][SNLED27351_LED_CONTROL_REGISTER_COUNT] = {0};
-bool    g_led_control_registers_update_required[SNLED27351_DRIVER_COUNT]                        = {false};
-
-bool snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
-    // If the transaction fails function returns false.
-    i2c_transfer_buffer[0] = reg;
-    i2c_transfer_buffer[1] = data;
-
-#if SNLED27351_I2C_PERSISTENCE > 0
-    for (uint8_t i = 0; i < SNLED27351_I2C_PERSISTENCE; i++) {
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, SNLED27351_I2C_TIMEOUT) != 0) {
-            return false;
-        }
-    }
-#else
-    if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, SNLED27351_I2C_TIMEOUT) != 0) {
-        return false;
-    }
-#endif
-    return true;
-}
-
-void snled27351_select_page(uint8_t addr, uint8_t page) {
-    snled27351_write_register(addr, SNLED27351_REG_COMMAND, page);
-}
-
-bool snled27351_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
-    // Assumes PG1 is already selected.
-    // If any of the transactions fails function returns false.
-    // Transmit PWM registers in 12 transfers of 16 bytes.
-    // i2c_transfer_buffer[] is 20 bytes
-
-    // Iterate over the pwm_buffer contents at 16 byte intervals.
-    for (int i = 0; i < SNLED27351_PWM_REGISTER_COUNT; i += 16) {
-        i2c_transfer_buffer[0] = i;
-        // Copy the data from i to i+15.
-        // Device will auto-increment register for data after the first byte
-        // Thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer.
-        for (int j = 0; j < 16; j++) {
-            i2c_transfer_buffer[1 + j] = pwm_buffer[i + j];
-        }
-
-#if SNLED27351_I2C_PERSISTENCE > 0
-        for (uint8_t i = 0; i < SNLED27351_I2C_PERSISTENCE; i++) {
-            if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, SNLED27351_I2C_TIMEOUT) != 0) {
-                return false;
-            }
-        }
-#else
-        if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, SNLED27351_I2C_TIMEOUT) != 0) {
-            return false;
-        }
-#endif
-    }
-    return true;
-}
-
-void snled27351_init_drivers(void) {
-    i2c_init();
-
-    snled27351_init(SNLED27351_I2C_ADDRESS_1);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_init(SNLED27351_I2C_ADDRESS_2);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_init(SNLED27351_I2C_ADDRESS_3);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_init(SNLED27351_I2C_ADDRESS_4);
-#        endif
-#    endif
-#endif
-
-    for (int i = 0; i < SNLED27351_LED_COUNT; i++) {
-        snled27351_set_led_control_register(i, true);
-    }
-
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_1, 0);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_2, 1);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_3, 2);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_update_led_control_registers(SNLED27351_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void snled27351_init(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
-
-    // Setting LED driver to shutdown mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
-    // Setting internal channel pulldown/pullup
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_PULLDOWNUP, SNLED27351_PULLDOWNUP_ALL_ENABLED);
-    // Select number of scan phase
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SCAN_PHASE, SNLED27351_PHASE_CHANNEL);
-    // Setting PWM Delay Phase
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1, SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE);
-    // Setting Driving/Sinking Channel Slew Rate
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2, SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE | SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE);
-    // Setting Iref
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, 0);
-
-    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
-
-    for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0x00);
-    }
-
-    snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
-
-    for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0x00);
-    }
-
-    snled27351_select_page(addr, SNLED27351_COMMAND_CURRENT_TUNE);
-
-    uint8_t current_tune_reg_list[SNLED27351_LED_CURRENT_TUNE_LENGTH] = SNLED27351_CURRENT_TUNE;
-    for (int i = 0; i < SNLED27351_LED_CURRENT_TUNE_LENGTH; i++) {
-        snled27351_write_register(addr, i, current_tune_reg_list[i]);
-    }
-
-    snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
-
-    // Enable LEDs ON/OFF
-    for (int i = 0; i < SNLED27351_LED_CONTROL_ON_OFF_LENGTH; i++) {
-        snled27351_write_register(addr, i, 0xFF);
-    }
-
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
-
-    // Setting LED driver to normal mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
-}
-
-void snled27351_set_value(int index, uint8_t value) {
-    snled27351_led_t led;
-    if (index >= 0 && index < SNLED27351_LED_COUNT) {
-        memcpy_P(&led, (&g_snled27351_leds[index]), sizeof(led));
-
-        if (g_pwm_buffer[led.driver][led.v] == value) {
-            return;
-        }
-        g_pwm_buffer[led.driver][led.v]          = value;
-        g_pwm_buffer_update_required[led.driver] = true;
-    }
-}
-
-void snled27351_set_value_all(uint8_t value) {
-    for (int i = 0; i < SNLED27351_LED_COUNT; i++) {
-        snled27351_set_value(i, value);
-    }
-}
-
-void snled27351_set_led_control_register(uint8_t index, bool value) {
-    snled27351_led_t led;
-    memcpy_P(&led, (&g_snled27351_leds[index]), sizeof(led));
-
-    uint8_t control_register = led.v / 8;
-    uint8_t bit_value        = led.v % 8;
-
-    if (value) {
-        g_led_control_registers[led.driver][control_register] |= (1 << bit_value);
-    } else {
-        g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value);
-    }
-
-    g_led_control_registers_update_required[led.driver] = true;
-}
-
-void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index) {
-    if (g_pwm_buffer_update_required[index]) {
-        snled27351_select_page(addr, SNLED27351_COMMAND_PWM);
-
-        // If any of the transactions fail we risk writing dirty PG0,
-        // refresh page 0 just in case.
-        if (!snled27351_write_pwm_buffer(addr, g_pwm_buffer[index])) {
-            g_led_control_registers_update_required[index] = true;
-        }
-    }
-    g_pwm_buffer_update_required[index] = false;
-}
-
-void snled27351_update_led_control_registers(uint8_t addr, uint8_t index) {
-    if (g_led_control_registers_update_required[index]) {
-        snled27351_select_page(addr, SNLED27351_COMMAND_LED_CONTROL);
-
-        for (int i = 0; i < SNLED27351_LED_CONTROL_REGISTER_COUNT; i++) {
-            snled27351_write_register(addr, i, g_led_control_registers[index][i]);
-        }
-    }
-    g_led_control_registers_update_required[index] = false;
-}
-
-void snled27351_flush(void) {
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_1, 0);
-#if defined(SNLED27351_I2C_ADDRESS_2)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_2, 1);
-#    if defined(SNLED27351_I2C_ADDRESS_3)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_3, 2);
-#        if defined(SNLED27351_I2C_ADDRESS_4)
-    snled27351_update_pwm_buffers(SNLED27351_I2C_ADDRESS_4, 3);
-#        endif
-#    endif
-#endif
-}
-
-void snled27351_sw_return_normal(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
-
-    // Setting LED driver to normal mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL);
-}
-
-void snled27351_sw_shutdown(uint8_t addr) {
-    snled27351_select_page(addr, SNLED27351_COMMAND_FUNCTION);
-
-    // Setting LED driver to shutdown mode
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN, SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN);
-    // Write SW Sleep Register
-    snled27351_write_register(addr, SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP, SNLED27351_SOFTWARE_SLEEP_ENABLE);
-}
diff --git a/drivers/led/snled27351-simple.h b/drivers/led/snled27351-simple.h
deleted file mode 100644
index 0a4d2469f0..0000000000
--- a/drivers/led/snled27351-simple.h
+++ /dev/null
@@ -1,381 +0,0 @@
-/* Copyright 2021 @ Keychron (https://www.keychron.com)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <stdbool.h>
-#include "progmem.h"
-#include "util.h"
-
-// ======== DEPRECATED DEFINES - DO NOT USE ========
-#ifdef CKLED2001_TIMEOUT
-#    define SNLED27351_I2C_TIMEOUT CKLED2001_TIMEOUT
-#endif
-#ifdef CKLED2001_PERSISTENCE
-#    define SNLED27351_I2C_PERSISTENCE CKLED2001_PERSISTENCE
-#endif
-#ifdef PHASE_CHANNEL
-#    define SNLED27351_PHASE_CHANNEL PHASE_CHANNEL
-#endif
-#ifdef CKLED2001_CURRENT_TUNE
-#    define SNLED27351_CURRENT_TUNE CKLED2001_CURRENT_TUNE
-#endif
-
-#define MSKPHASE_12CHANNEL SNLED27351_SCAN_PHASE_12_CHANNEL
-#define MSKPHASE_11CHANNEL SNLED27351_SCAN_PHASE_11_CHANNEL
-#define MSKPHASE_10CHANNEL SNLED27351_SCAN_PHASE_10_CHANNEL
-#define MSKPHASE_9CHANNEL SNLED27351_SCAN_PHASE_9_CHANNEL
-#define MSKPHASE_8CHANNEL SNLED27351_SCAN_PHASE_8_CHANNEL
-#define MSKPHASE_7CHANNEL SNLED27351_SCAN_PHASE_7_CHANNEL
-#define MSKPHASE_6CHANNEL SNLED27351_SCAN_PHASE_6_CHANNEL
-#define MSKPHASE_5CHANNEL SNLED27351_SCAN_PHASE_5_CHANNEL
-#define MSKPHASE_4CHANNEL SNLED27351_SCAN_PHASE_4_CHANNEL
-#define MSKPHASE_3CHANNEL SNLED27351_SCAN_PHASE_3_CHANNEL
-#define MSKPHASE_2CHANNEL SNLED27351_SCAN_PHASE_2_CHANNEL
-#define MSKPHASE_1CHANNEL SNLED27351_SCAN_PHASE_1_CHANNEL
-
-#define ckled2001_led snled27351_led_t
-#define g_ckled2001_leds g_snled27351_leds
-// ========
-
-#define SNLED27351_REG_COMMAND 0xFD
-#define SNLED27351_COMMAND_LED_CONTROL 0x00
-#define SNLED27351_COMMAND_PWM 0x01
-#define SNLED27351_COMMAND_FUNCTION 0x03
-#define SNLED27351_COMMAND_CURRENT_TUNE 0x04
-
-#define SNLED27351_FUNCTION_REG_SOFTWARE_SHUTDOWN 0x00
-#define SNLED27351_SOFTWARE_SHUTDOWN_SSD_SHUTDOWN (0x0 << 0)
-#define SNLED27351_SOFTWARE_SHUTDOWN_SSD_NORMAL (0x1 << 0)
-
-#define SNLED27351_FUNCTION_REG_ID 0x11
-#define SNLED27351_DRIVER_ID 0x8A
-
-#define SNLED27351_FUNCTION_REG_PULLDOWNUP 0x13
-#define SNLED27351_PULLDOWNUP_ALL_ENABLED 0xAA
-
-#define SNLED27351_FUNCTION_REG_SCAN_PHASE 0x14
-#define SNLED27351_SCAN_PHASE_12_CHANNEL 0x00
-#define SNLED27351_SCAN_PHASE_11_CHANNEL 0x01
-#define SNLED27351_SCAN_PHASE_10_CHANNEL 0x02
-#define SNLED27351_SCAN_PHASE_9_CHANNEL 0x03
-#define SNLED27351_SCAN_PHASE_8_CHANNEL 0x04
-#define SNLED27351_SCAN_PHASE_7_CHANNEL 0x05
-#define SNLED27351_SCAN_PHASE_6_CHANNEL 0x06
-#define SNLED27351_SCAN_PHASE_5_CHANNEL 0x07
-#define SNLED27351_SCAN_PHASE_4_CHANNEL 0x08
-#define SNLED27351_SCAN_PHASE_3_CHANNEL 0x09
-#define SNLED27351_SCAN_PHASE_2_CHANNEL 0x0A
-#define SNLED27351_SCAN_PHASE_1_CHANNEL 0x0B
-
-#define SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_1 0x15
-#define SNLED27351_SLEW_RATE_CONTROL_MODE_1_PDP_ENABLE (0b1 << 2)
-
-#define SNLED27351_FUNCTION_REG_SLEW_RATE_CONTROL_MODE_2 0x16
-#define SNLED27351_SLEW_RATE_CONTROL_MODE_2_SSL_ENABLE (0b1 << 6)
-#define SNLED27351_SLEW_RATE_CONTROL_MODE_2_DSL_ENABLE (0b1 << 7)
-
-#define SNLED27351_FUNCTION_REG_OPEN_SHORT_ENABLE 0x17
-#define SNLED27351_OPEN_SHORT_ENABLE_SDS_ENABLE (0b1 << 6)
-#define SNLED27351_OPEN_SHORT_ENABLE_ODS_ENABLE (0b1 << 7)
-
-#define SNLED27351_FUNCTION_REG_OPEN_SHORT_DUTY 0x18
-
-#define SNLED27351_FUNCTION_REG_OPEN_SHORT_FLAG 0x19
-#define SNLED27351_OPEN_SHORT_FLAG_OSINT_ENABLE (0b1 << 6)
-#define SNLED27351_OPEN_SHORT_FLAG_ODINT_ENABLE (0b1 << 7)
-
-#define SNLED27351_FUNCTION_REG_SOFTWARE_SLEEP 0x1A
-#define SNLED27351_SOFTWARE_SLEEP_ENABLE (0b1 << 1)
-
-// LED Control Registers
-#define SNLED27351_LED_CONTROL_ON_OFF_FIRST_ADDR 0x0
-#define SNLED27351_LED_CONTROL_ON_OFF_LAST_ADDR 0x17
-#define SNLED27351_LED_CONTROL_ON_OFF_LENGTH ((SNLED27351_LED_CONTROL_ON_OFF_LAST_ADDR - SNLED27351_LED_CONTROL_ON_OFF_FIRST_ADDR) + 1)
-
-#define SNLED27351_LED_CONTROL_OPEN_FIRST_ADDR 0x18
-#define SNLED27351_LED_CONTROL_OPEN_LAST_ADDR 0x2F
-#define SNLED27351_LED_CONTROL_OPEN_LENGTH ((SNLED27351_LED_CONTROL_OPEN_LAST_ADDR - SNLED27351_LED_CONTROL_OPEN_FIRST_ADDR) + 1)
-
-#define SNLED27351_LED_CONTROL_SHORT_FIRST_ADDR 0x30
-#define SNLED27351_LED_CONTROL_SHORT_LAST_ADDR 0x47
-#define SNLED27351_LED_CONTROL_SHORT_LENGTH ((SNLED27351_LED_CONTROL_SHORT_LAST_ADDR - SNLED27351_LED_CONTROL_SHORT_FIRST_ADDR) + 1)
-
-#define SNLED27351_LED_CONTROL_PAGE_LENGTH 0x48
-
-// LED Control Registers
-#define SNLED27351_LED_PWM_FIRST_ADDR 0x00
-#define SNLED27351_LED_PWM_LAST_ADDR 0xBF
-#define SNLED27351_LED_PWM_LENGTH 0xC0
-
-// Current Tune Registers
-#define SNLED27351_LED_CURRENT_TUNE_FIRST_ADDR 0x00
-#define SNLED27351_LED_CURRENT_TUNE_LAST_ADDR 0x0B
-#define SNLED27351_LED_CURRENT_TUNE_LENGTH 0x0C
-
-#define SNLED27351_I2C_ADDRESS_GND 0x74
-#define SNLED27351_I2C_ADDRESS_SCL 0x75
-#define SNLED27351_I2C_ADDRESS_SDA 0x76
-#define SNLED27351_I2C_ADDRESS_VDDIO 0x77
-
-#if defined(LED_MATRIX_SNLED27351)
-#    define SNLED27351_LED_COUNT LED_MATRIX_LED_COUNT
-#endif
-
-#if defined(SNLED27351_I2C_ADDRESS_4)
-#    define SNLED27351_DRIVER_COUNT 4
-#elif defined(SNLED27351_I2C_ADDRESS_3)
-#    define SNLED27351_DRIVER_COUNT 3
-#elif defined(SNLED27351_I2C_ADDRESS_2)
-#    define SNLED27351_DRIVER_COUNT 2
-#elif defined(SNLED27351_I2C_ADDRESS_1)
-#    define SNLED27351_DRIVER_COUNT 1
-#endif
-
-typedef struct snled27351_led_t {
-    uint8_t driver : 2;
-    uint8_t v;
-} PACKED snled27351_led_t;
-
-extern const snled27351_led_t PROGMEM g_snled27351_leds[SNLED27351_LED_COUNT];
-
-void snled27351_init_drivers(void);
-void snled27351_init(uint8_t addr);
-void snled27351_select_page(uint8_t addr, uint8_t page);
-bool snled27351_write_register(uint8_t addr, uint8_t reg, uint8_t data);
-bool snled27351_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer);
-
-void snled27351_set_value(int index, uint8_t value);
-void snled27351_set_value_all(uint8_t value);
-
-void snled27351_set_led_control_register(uint8_t index, bool value);
-
-// This should not be called from an interrupt
-// (eg. from a timer interrupt).
-// Call this while idle (in between matrix scans).
-// If the buffer is dirty, it will update the driver with the buffer.
-void snled27351_update_pwm_buffers(uint8_t addr, uint8_t index);
-void snled27351_update_led_control_registers(uint8_t addr, uint8_t index);
-
-void snled27351_flush(void);
-
-void snled27351_sw_return_normal(uint8_t addr);
-void snled27351_sw_shutdown(uint8_t addr);
-
-#define A_1 0x00
-#define A_2 0x01
-#define A_3 0x02
-#define A_4 0x03
-#define A_5 0x04
-#define A_6 0x05
-#define A_7 0x06
-#define A_8 0x07
-#define A_9 0x08
-#define A_10 0x09
-#define A_11 0x0A
-#define A_12 0x0B
-#define A_13 0x0C
-#define A_14 0x0D
-#define A_15 0x0E
-#define A_16 0x0F
-
-#define B_1 0x10
-#define B_2 0x11
-#define B_3 0x12
-#define B_4 0x13
-#define B_5 0x14
-#define B_6 0x15
-#define B_7 0x16
-#define B_8 0x17
-#define B_9 0x18
-#define B_10 0x19
-#define B_11 0x1A
-#define B_12 0x1B
-#define B_13 0x1C
-#define B_14 0x1D
-#define B_15 0x1E
-#define B_16 0x1F
-
-#define C_1 0x20
-#define C_2 0x21
-#define C_3 0x22
-#define C_4 0x23
-#define C_5 0x24
-#define C_6 0x25
-#define C_7 0x26
-#define C_8 0x27
-#define C_9 0x28
-#define C_10 0x29
-#define C_11 0x2A
-#define C_12 0x2B
-#define C_13 0x2C
-#define C_14 0x2D
-#define C_15 0x2E
-#define C_16 0x2F
-
-#define D_1 0x30
-#define D_2 0x31
-#define D_3 0x32
-#define D_4 0x33
-#define D_5 0x34
-#define D_6 0x35
-#define D_7 0x36
-#define D_8 0x37
-#define D_9 0x38
-#define D_10 0x39
-#define D_11 0x3A
-#define D_12 0x3B
-#define D_13 0x3C
-#define D_14 0x3D
-#define D_15 0x3E
-#define D_16 0x3F
-
-#define E_1 0x40
-#define E_2 0x41
-#define E_3 0x42
-#define E_4 0x43
-#define E_5 0x44
-#define E_6 0x45
-#define E_7 0x46
-#define E_8 0x47
-#define E_9 0x48
-#define E_10 0x49
-#define E_11 0x4A
-#define E_12 0x4B
-#define E_13 0x4C
-#define E_14 0x4D
-#define E_15 0x4E
-#define E_16 0x4F
-
-#define F_1 0x50
-#define F_2 0x51
-#define F_3 0x52
-#define F_4 0x53
-#define F_5 0x54
-#define F_6 0x55
-#define F_7 0x56
-#define F_8 0x57
-#define F_9 0x58
-#define F_10 0x59
-#define F_11 0x5A
-#define F_12 0x5B
-#define F_13 0x5C
-#define F_14 0x5D
-#define F_15 0x5E
-#define F_16 0x5F
-
-#define G_1 0x60
-#define G_2 0x61
-#define G_3 0x62
-#define G_4 0x63
-#define G_5 0x64
-#define G_6 0x65
-#define G_7 0x66
-#define G_8 0x67
-#define G_9 0x68
-#define G_10 0x69
-#define G_11 0x6A
-#define G_12 0x6B
-#define G_13 0x6C
-#define G_14 0x6D
-#define G_15 0x6E
-#define G_16 0x6F
-
-#define H_1 0x70
-#define H_2 0x71
-#define H_3 0x72
-#define H_4 0x73
-#define H_5 0x74
-#define H_6 0x75
-#define H_7 0x76
-#define H_8 0x77
-#define H_9 0x78
-#define H_10 0x79
-#define H_11 0x7A
-#define H_12 0x7B
-#define H_13 0x7C
-#define H_14 0x7D
-#define H_15 0x7E
-#define H_16 0x7F
-
-#define I_1 0x80
-#define I_2 0x81
-#define I_3 0x82
-#define I_4 0x83
-#define I_5 0x84
-#define I_6 0x85
-#define I_7 0x86
-#define I_8 0x87
-#define I_9 0x88
-#define I_10 0x89
-#define I_11 0x8A
-#define I_12 0x8B
-#define I_13 0x8C
-#define I_14 0x8D
-#define I_15 0x8E
-#define I_16 0x8F
-
-#define J_1 0x90
-#define J_2 0x91
-#define J_3 0x92
-#define J_4 0x93
-#define J_5 0x94
-#define J_6 0x95
-#define J_7 0x96
-#define J_8 0x97
-#define J_9 0x98
-#define J_10 0x99
-#define J_11 0x9A
-#define J_12 0x9B
-#define J_13 0x9C
-#define J_14 0x9D
-#define J_15 0x9E
-#define J_16 0x9F
-
-#define K_1 0xA0
-#define K_2 0xA1
-#define K_3 0xA2
-#define K_4 0xA3
-#define K_5 0xA4
-#define K_6 0xA5
-#define K_7 0xA6
-#define K_8 0xA7
-#define K_9 0xA8
-#define K_10 0xA9
-#define K_11 0xAA
-#define K_12 0xAB
-#define K_13 0xAC
-#define K_14 0xAD
-#define K_15 0xAE
-#define K_16 0xAF
-
-#define L_1 0xB0
-#define L_2 0xB1
-#define L_3 0xB2
-#define L_4 0xB3
-#define L_5 0xB4
-#define L_6 0xB5
-#define L_7 0xB6
-#define L_8 0xB7
-#define L_9 0xB8
-#define L_10 0xB9
-#define L_11 0xBA
-#define L_12 0xBB
-#define L_13 0xBC
-#define L_14 0xBD
-#define L_15 0xBE
-#define L_16 0xBF
-- 
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