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-rw-r--r--common_features.mk13
1 files changed, 8 insertions, 5 deletions
diff --git a/common_features.mk b/common_features.mk
index fdc481fd2a..2e2991c648 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -224,12 +224,15 @@ VALID_LED_MATRIX_TYPES := IS31FL3731 custom
ifeq ($(strip $(LED_MATRIX_ENABLE)), yes)
ifeq ($(filter $(LED_MATRIX_DRIVER),$(VALID_LED_MATRIX_TYPES)),)
$(error "$(LED_MATRIX_DRIVER)" is not a valid matrix type)
- else
- OPT_DEFS += -DLED_MATRIX_ENABLE
- SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
- SRC += $(QUANTUM_DIR)/led_matrix.c
- SRC += $(QUANTUM_DIR)/led_matrix_drivers.c
endif
+ OPT_DEFS += -DLED_MATRIX_ENABLE
+ifneq (,$(filter $(MCU), atmega16u2 atmega32u2 at90usb162))
+ # ATmegaxxU2 does not have hardware MUL instruction - lib8tion must be told to use software multiplication routines
+ OPT_DEFS += -DLIB8_ATTINY
+endif
+ SRC += $(QUANTUM_DIR)/process_keycode/process_backlight.c
+ SRC += $(QUANTUM_DIR)/led_matrix.c
+ SRC += $(QUANTUM_DIR)/led_matrix_drivers.c
ifeq ($(strip $(LED_MATRIX_DRIVER)), IS31FL3731)
OPT_DEFS += -DIS31FL3731 -DSTM32_I2C -DHAL_USE_I2C=TRUE