Allow for disabling EEPROM subsystem entirely. (#25173)

1 files changed, 74 insertions, 72 deletions

diff --git a/builddefs/common_features.mk b/builddefs/common_features.mk
index 802e01de43..f30a456fc3 100644
--- a/builddefs/common_features.mk
+++ b/builddefs/common_features.mk
@@ -171,80 +171,82 @@ endif
 
 VALID_EEPROM_DRIVER_TYPES := vendor custom transient i2c spi wear_leveling legacy_stm32_flash
 EEPROM_DRIVER ?= vendor
-ifeq ($(filter $(EEPROM_DRIVER),$(VALID_EEPROM_DRIVER_TYPES)),)
+ifneq ($(strip $(EEPROM_DRIVER)),none)
+  ifeq ($(filter $(EEPROM_DRIVER),$(VALID_EEPROM_DRIVER_TYPES)),)
   $(call CATASTROPHIC_ERROR,Invalid EEPROM_DRIVER,EEPROM_DRIVER="$(EEPROM_DRIVER)" is not a valid EEPROM driver)
-else
-  OPT_DEFS += -DEEPROM_ENABLE
-  COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/eeprom
-  COMMON_VPATH += $(DRIVER_PATH)/eeprom
-  COMMON_VPATH += $(PLATFORM_COMMON_DIR)
-  ifeq ($(strip $(EEPROM_DRIVER)), custom)
-    # Custom EEPROM implementation -- only needs to implement init/erase/read_block/write_block
-    OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_CUSTOM
-    SRC += eeprom_driver.c
-  else ifeq ($(strip $(EEPROM_DRIVER)), wear_leveling)
-    # Wear-leveling EEPROM implementation
-    OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_WEAR_LEVELING
-    SRC += eeprom_driver.c eeprom_wear_leveling.c
-  else ifeq ($(strip $(EEPROM_DRIVER)), i2c)
-    # External I2C EEPROM implementation
-    OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_I2C
-    I2C_DRIVER_REQUIRED = yes
-    SRC += eeprom_driver.c eeprom_i2c.c
-  else ifeq ($(strip $(EEPROM_DRIVER)), spi)
-    # External SPI EEPROM implementation
-    OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_SPI
-    SPI_DRIVER_REQUIRED = yes
-    SRC += eeprom_driver.c eeprom_spi.c
-  else ifeq ($(strip $(EEPROM_DRIVER)), legacy_stm32_flash)
-    # STM32 Emulated EEPROM, backed by MCU flash (soon to be deprecated)
-    OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_LEGACY_EMULATED_FLASH
-    COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/flash
-    COMMON_VPATH += $(DRIVER_PATH)/flash
-    SRC += eeprom_driver.c eeprom_legacy_emulated_flash.c legacy_flash_ops.c
-  else ifeq ($(strip $(EEPROM_DRIVER)), transient)
-    # Transient EEPROM implementation -- no data storage but provides runtime area for it
-    OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_TRANSIENT
-    SRC += eeprom_driver.c eeprom_transient.c
-  else ifeq ($(strip $(EEPROM_DRIVER)), vendor)
-    # Vendor-implemented EEPROM
-    OPT_DEFS += -DEEPROM_VENDOR
-    ifeq ($(PLATFORM),AVR)
-      # Automatically provided by avr-libc, nothing required
-    else ifeq ($(PLATFORM),CHIBIOS)
-      ifneq ($(filter %_STM32F072xB %_STM32F042x6, $(MCU_SERIES)_$(MCU_LDSCRIPT)),)
-        # STM32 Emulated EEPROM, backed by MCU flash (soon to be deprecated)
-        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_LEGACY_EMULATED_FLASH
-        COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/flash
-        COMMON_VPATH += $(DRIVER_PATH)/flash
-        SRC += eeprom_driver.c eeprom_legacy_emulated_flash.c legacy_flash_ops.c
-      else ifneq ($(filter $(MCU_SERIES),STM32F1xx STM32F3xx STM32F4xx STM32L4xx STM32G4xx WB32F3G71xx WB32FQ95xx AT32F415 GD32VF103),)
-        # Wear-leveling EEPROM implementation, backed by MCU flash
-        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_WEAR_LEVELING
-        SRC += eeprom_driver.c eeprom_wear_leveling.c
-        WEAR_LEVELING_DRIVER ?= embedded_flash
-      else ifneq ($(filter $(MCU_SERIES),STM32L0xx STM32L1xx),)
-        # True EEPROM on STM32L0xx, L1xx
-        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_STM32_L0_L1
-        SRC += eeprom_driver.c eeprom_stm32_L0_L1.c
-      else ifneq ($(filter $(MCU_SERIES),RP2040),)
-        # Wear-leveling EEPROM implementation, backed by RP2040 flash
-        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_WEAR_LEVELING
-        SRC += eeprom_driver.c eeprom_wear_leveling.c
-        WEAR_LEVELING_DRIVER ?= rp2040_flash
-      else ifneq ($(filter $(MCU_SERIES),KL2x K20x),)
-        # Teensy EEPROM implementations
-        OPT_DEFS += -DEEPROM_KINETIS_FLEXRAM
-        SRC += eeprom_kinetis_flexram.c
-      else
-        # Fall back to transient, i.e. non-persistent
-        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_TRANSIENT
-        SRC += eeprom_driver.c eeprom_transient.c
+  else
+    OPT_DEFS += -DEEPROM_ENABLE
+    COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/eeprom
+    COMMON_VPATH += $(DRIVER_PATH)/eeprom
+    COMMON_VPATH += $(PLATFORM_COMMON_DIR)
+    ifeq ($(strip $(EEPROM_DRIVER)), custom)
+      # Custom EEPROM implementation -- only needs to implement init/erase/read_block/write_block
+      OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_CUSTOM
+      SRC += eeprom_driver.c
+    else ifeq ($(strip $(EEPROM_DRIVER)), wear_leveling)
+      # Wear-leveling EEPROM implementation
+      OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_WEAR_LEVELING
+      SRC += eeprom_driver.c eeprom_wear_leveling.c
+    else ifeq ($(strip $(EEPROM_DRIVER)), i2c)
+      # External I2C EEPROM implementation
+      OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_I2C
+      I2C_DRIVER_REQUIRED = yes
+      SRC += eeprom_driver.c eeprom_i2c.c
+    else ifeq ($(strip $(EEPROM_DRIVER)), spi)
+      # External SPI EEPROM implementation
+      OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_SPI
+      SPI_DRIVER_REQUIRED = yes
+      SRC += eeprom_driver.c eeprom_spi.c
+    else ifeq ($(strip $(EEPROM_DRIVER)), legacy_stm32_flash)
+      # STM32 Emulated EEPROM, backed by MCU flash (soon to be deprecated)
+      OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_LEGACY_EMULATED_FLASH
+      COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/flash
+      COMMON_VPATH += $(DRIVER_PATH)/flash
+      SRC += eeprom_driver.c eeprom_legacy_emulated_flash.c legacy_flash_ops.c
+    else ifeq ($(strip $(EEPROM_DRIVER)), transient)
+      # Transient EEPROM implementation -- no data storage but provides runtime area for it
+      OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_TRANSIENT
+      SRC += eeprom_driver.c eeprom_transient.c
+    else ifeq ($(strip $(EEPROM_DRIVER)), vendor)
+      # Vendor-implemented EEPROM
+      OPT_DEFS += -DEEPROM_VENDOR
+      ifeq ($(PLATFORM),AVR)
+        # Automatically provided by avr-libc, nothing required
+      else ifeq ($(PLATFORM),CHIBIOS)
+        ifneq ($(filter %_STM32F072xB %_STM32F042x6, $(MCU_SERIES)_$(MCU_LDSCRIPT)),)
+          # STM32 Emulated EEPROM, backed by MCU flash (soon to be deprecated)
+          OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_LEGACY_EMULATED_FLASH
+          COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/flash
+          COMMON_VPATH += $(DRIVER_PATH)/flash
+          SRC += eeprom_driver.c eeprom_legacy_emulated_flash.c legacy_flash_ops.c
+        else ifneq ($(filter $(MCU_SERIES),STM32F1xx STM32F3xx STM32F4xx STM32L4xx STM32G4xx WB32F3G71xx WB32FQ95xx AT32F415 GD32VF103),)
+          # Wear-leveling EEPROM implementation, backed by MCU flash
+          OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_WEAR_LEVELING
+          SRC += eeprom_driver.c eeprom_wear_leveling.c
+          WEAR_LEVELING_DRIVER ?= embedded_flash
+        else ifneq ($(filter $(MCU_SERIES),STM32L0xx STM32L1xx),)
+          # True EEPROM on STM32L0xx, L1xx
+          OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_STM32_L0_L1
+          SRC += eeprom_driver.c eeprom_stm32_L0_L1.c
+        else ifneq ($(filter $(MCU_SERIES),RP2040),)
+          # Wear-leveling EEPROM implementation, backed by RP2040 flash
+          OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_WEAR_LEVELING
+          SRC += eeprom_driver.c eeprom_wear_leveling.c
+          WEAR_LEVELING_DRIVER ?= rp2040_flash
+        else ifneq ($(filter $(MCU_SERIES),KL2x K20x),)
+          # Teensy EEPROM implementations
+          OPT_DEFS += -DEEPROM_KINETIS_FLEXRAM
+          SRC += eeprom_kinetis_flexram.c
+        else
+          # Fall back to transient, i.e. non-persistent
+          OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_TRANSIENT
+          SRC += eeprom_driver.c eeprom_transient.c
+        endif
+      else ifeq ($(PLATFORM),TEST)
+        # Test harness "EEPROM"
+        OPT_DEFS += -DEEPROM_TEST_HARNESS
+        SRC += eeprom.c
       endif
-    else ifeq ($(PLATFORM),TEST)
-      # Test harness "EEPROM"
-      OPT_DEFS += -DEEPROM_TEST_HARNESS
-      SRC += eeprom.c
     endif
   endif
 endif