Move some common matrix code to a common location (#7699)

* Move some common matrix code to a common location

* Refactor some 'custom_matrix_helper' logic to use custom matrix lite

* Fix build for kinesis/stapelberg - abuse of vpath was picking up matrix.c from core when custom matrix was enabled

* Add validation for CUSTOM_MATRIX

1 files changed, 21 insertions, 5 deletions

diff --git a/common_features.mk b/common_features.mk
index 92b24bb20..67c64b425 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -374,12 +374,28 @@ QUANTUM_SRC:= \
     $(QUANTUM_DIR)/keymap_common.c \
     $(QUANTUM_DIR)/keycode_config.c
 
-# Include the standard or split matrix code if needed
+
+
+VALID_CUSTOM_MATRIX_TYPES:= yes lite no
+
+CUSTOM_MATRIX ?= no
+
 ifneq ($(strip $(CUSTOM_MATRIX)), yes)
-    ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
-        QUANTUM_SRC += $(QUANTUM_DIR)/split_common/matrix.c
-    else
-        QUANTUM_SRC += $(QUANTUM_DIR)/matrix.c
+    ifeq ($(filter $(CUSTOM_MATRIX),$(VALID_CUSTOM_MATRIX_TYPES)),)
+        $(error CUSTOM_MATRIX="$(CUSTOM_MATRIX)" is not a valid custom matrix type)
+    endif
+
+    # Include common stuff for all non custom matrix users
+    QUANTUM_SRC += $(QUANTUM_DIR)/matrix_common.c
+
+    # if 'lite' then skip the actual matrix implementation
+    ifneq ($(strip $(CUSTOM_MATRIX)), lite)
+        # Include the standard or split matrix code if needed
+        ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
+            QUANTUM_SRC += $(QUANTUM_DIR)/split_common/matrix.c
+        else
+            QUANTUM_SRC += $(QUANTUM_DIR)/matrix.c
+        endif
     endif
 endif