From ce8b8414d96e9d9ecb2e001fc5844a8fa9b7addc Mon Sep 17 00:00:00 2001
From: Joel Challis
Date: Sat, 19 Apr 2025 22:52:25 +0100
Subject: Remove `bluefruit_le_read_battery_voltage` function (#25129)

---
 keyboards/handwired/promethium/config.h     |  5 ++---
 keyboards/handwired/promethium/promethium.c | 17 ++++++++---------
 keyboards/handwired/promethium/rules.mk     |  2 +-
 3 files changed, 11 insertions(+), 13 deletions(-)

(limited to 'keyboards/handwired')

diff --git a/keyboards/handwired/promethium/config.h b/keyboards/handwired/promethium/config.h
index 806726b5eb..974a4f951f 100644
--- a/keyboards/handwired/promethium/config.h
+++ b/keyboards/handwired/promethium/config.h
@@ -63,9 +63,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_ONESHOT
 
 #define PS2_MOUSE_INIT_DELAY 2000
-#define BATTERY_POLL         30000
-#define MAX_VOLTAGE          4.2
-#define MIN_VOLTAGE          3.2
+
+#define BATTERY_PIN B5
 
 #ifndef __ASSEMBLER__  // assembler doesn't like enum in .h file
 enum led_sequence {
diff --git a/keyboards/handwired/promethium/promethium.c b/keyboards/handwired/promethium/promethium.c
index 63139ac09d..c94a27a4de 100644
--- a/keyboards/handwired/promethium/promethium.c
+++ b/keyboards/handwired/promethium/promethium.c
@@ -1,16 +1,15 @@
-#include "promethium.h"
-#include "analog.h"
+#include "keyboard.h"
 #include "timer.h"
-#include "matrix.h"
-#include "bluefruit_le.h"
+#include "battery.h"
 
-// cubic fit {3.3, 0}, {3.5, 2.9}, {3.6, 5}, {3.7, 8.6}, {3.8, 36},  {3.9, 62}, {4.0, 73}, {4.05, 83}, {4.1, 89}, {4.15, 94}, {4.2, 100}
+#ifndef BATTERY_POLL
+#    define BATTERY_POLL 30000
+#endif
 
 uint8_t battery_level(void) {
-    float voltage = bluefruit_le_read_battery_voltage() * 2 * 3.3 / 1024;
-    if (voltage < MIN_VOLTAGE) return 0;
-    if (voltage > MAX_VOLTAGE) return 255;
-    return (voltage - MIN_VOLTAGE) / (MAX_VOLTAGE - MIN_VOLTAGE) * 255;
+    // maintain legacy behaviour and scale 0-100 percent to 0-255
+    uint16_t percent = battery_get_percent();
+    return  (percent * 255) / 100;
 }
 
 __attribute__ ((weak))
diff --git a/keyboards/handwired/promethium/rules.mk b/keyboards/handwired/promethium/rules.mk
index 7f20880066..4012f8ca29 100644
--- a/keyboards/handwired/promethium/rules.mk
+++ b/keyboards/handwired/promethium/rules.mk
@@ -5,7 +5,7 @@ PS2_DRIVER = interrupt
 CUSTOM_MATRIX = yes
 
 WS2812_DRIVER_REQUIRED = yes
-ANALOG_DRIVER_REQUIRED = yes
+BATTERY_DRIVER_REQUIRED = yes
 
 SRC += rgbsps.c
 SRC += matrix.c
-- 
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