diff --git a/os/hal/ports/STM32/STM32L4xx/platform_l432.mk b/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
index 74337edc8..1a6d217bc 100644
--- a/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
+++ b/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
@@ -1,103 +1,35 @@
-# List of all the STM32L432 platform files.
+# Required platform files.
+PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
+               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_lld.c
+
+# Required include directories.
+PLATFORMINC := $(CHIBIOS)/os/hal/ports/common/ARMCMx \
+               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx
+
+# Optional platform files.
 ifeq ($(USE_SMART_BUILD),yes)
 HALCONF := $(strip $(shell cat halconf.h | egrep -e "\#define"))
 
-PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
-               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/DMAv1/stm32_dma.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_st_lld.c
-ifneq ($(findstring HAL_USE_ADC TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/ADCv3/hal_adc_lld.c
-endif
-ifneq ($(findstring HAL_USE_CAN TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
-endif
-ifneq ($(findstring HAL_USE_DAC TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
-endif
 ifneq ($(findstring HAL_USE_EXT TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_ext_lld_isr.c
-endif
-ifneq ($(findstring HAL_USE_PAL TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv3/hal_pal_lld.c
-endif
-ifneq ($(findstring HAL_USE_I2C TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2/hal_i2c_lld.c
-endif
-ifneq ($(findstring HAL_USE_USB TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1/hal_usb_lld.c
-endif
-ifneq ($(findstring HAL_USE_QSPI TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/QUADSPIv1/hal_qspi_lld.c
-endif
-ifneq ($(findstring HAL_USE_RTC TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2/hal_rtc_lld.c
-endif
-ifneq ($(findstring HAL_USE_SDC TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/SDMMCv1/hal_sdc_lld.c
-endif
-ifneq ($(findstring HAL_USE_SPI TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2/hal_spi_lld.c
-endif
-ifneq ($(findstring HAL_USE_GPT TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_gpt_lld.c
-endif
-ifneq ($(findstring HAL_USE_ICU TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_icu_lld.c
-endif
-ifneq ($(findstring HAL_USE_PWM TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_pwm_lld.c
-endif
-ifneq ($(findstring HAL_USE_SERIAL TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/hal_serial_lld.c
-endif
-ifneq ($(findstring HAL_USE_UART TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c
-endif
-ifneq ($(findstring HAL_USE_WDG TRUE,$(HALCONF)),)
-PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_ext_lld_isr.c
 endif
 else
-PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
-               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_ext_lld_isr.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/ADCv3/hal_adc_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/DMAv1/stm32_dma.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv3/hal_pal_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2/hal_i2c_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1/hal_usb_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/QUADSPIv1/hal_qspi_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2/hal_rtc_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2/hal_spi_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/SDMMCv1/hal_sdc_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_gpt_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_icu_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_pwm_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/hal_st_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/hal_serial_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/hal_uart_lld.c \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/xWDGv1/hal_wdg_lld.c
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/hal_ext_lld_isr.c
 endif
 
-# Required include directories
-PLATFORMINC := $(CHIBIOS)/os/hal/ports/common/ARMCMx \
-               $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/ADCv3 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/CANv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/DMAv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/EXTIv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv3 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/QUADSPIv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/SDMMCv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2 \
-               $(CHIBIOS)/os/hal/ports/STM32/LLD/xWDGv1
+# Drivers compatible with the platform.
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/ADCv3/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/CANv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/DMAv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/EXTIv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv3/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/QUADSPIv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/SDMMCv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1/driver.mk
+include $(CHIBIOS)/os/hal/ports/STM32/LLD/xWDGv1/driver.mk