BACKLIGHT_ENABLE ?= no
BACKLIGHT_DRIVER ?= pwm
ifeq ($(strip $(BACKLIGHT_ENABLE)), yes)
+ SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
ifeq ($(filter $(BACKLIGHT_DRIVER),$(VALID_BACKLIGHT_TYPES)),)
$(error BACKLIGHT_DRIVER="$(BACKLIGHT_DRIVER)" is not a valid backlight type)
endif