Migrate more custom matrix 'lite' code to core (#7863)

* Migrate more custom matrix lite code to core

* Align function names

* fix up MATRIX_MASKED

3 files changed, 52 insertions, 28 deletions

diff --git a/quantum/matrix.c b/quantum/matrix.c
index 62a86fba68..1675f2477b 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -22,10 +22,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "debounce.h"
 #include "quantum.h"
 
-#ifdef MATRIX_MASKED
-extern const matrix_row_t matrix_mask[];
-#endif
-
 #ifdef DIRECT_PINS
 static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
 #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
@@ -34,22 +30,8 @@ static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 #endif
 
 /* matrix state(1:on, 0:off) */
-static matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
-static matrix_row_t matrix[MATRIX_ROWS];      // debounced values
-
-// helper functions
-
-inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
-
-inline matrix_row_t matrix_get_row(uint8_t row) {
-    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
-    // switch blocker installed and the switch is always pressed.
-#ifdef MATRIX_MASKED
-    return matrix[row] & matrix_mask[row];
-#else
-    return matrix[row];
-#endif
-}
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
 
 // matrix code
 
diff --git a/quantum/matrix_common.c b/quantum/matrix_common.c
index 22704e8ee2..a8948a264b 100644
--- a/quantum/matrix_common.c
+++ b/quantum/matrix_common.c
@@ -3,6 +3,14 @@
 #include "print.h"
 #include "debug.h"
 
+/* matrix state(1:on, 0:off) */
+matrix_row_t raw_matrix[MATRIX_ROWS];
+matrix_row_t matrix[MATRIX_ROWS];
+
+#ifdef MATRIX_MASKED
+extern const matrix_row_t matrix_mask[];
+#endif
+
 // user-defined overridable functions
 
 __attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
@@ -19,6 +27,18 @@ inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
 
 inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
 
+inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
+
+inline matrix_row_t matrix_get_row(uint8_t row) {
+    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
+    // switch blocker installed and the switch is always pressed.
+#ifdef MATRIX_MASKED
+    return matrix[row] & matrix_mask[row];
+#else
+    return matrix[row];
+#endif
+}
+
 // Deprecated.
 bool matrix_is_modified(void) {
     if (debounce_active()) return false;
@@ -57,3 +77,31 @@ uint8_t matrix_key_count(void) {
     }
     return count;
 }
+
+// CUSTOM MATRIX 'LITE'
+__attribute__((weak)) void matrix_init_custom(void) {}
+
+__attribute__((weak)) bool matrix_scan_custom(matrix_row_t current_matrix[]) { return true; }
+
+__attribute__((weak)) void matrix_init(void) {
+    matrix_init_custom();
+
+    // initialize matrix state: all keys off
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        raw_matrix[i] = 0;
+        matrix[i]     = 0;
+    }
+
+    debounce_init(MATRIX_ROWS);
+
+    matrix_init_quantum();
+}
+
+__attribute__((weak)) uint8_t matrix_scan(void) {
+    bool changed = matrix_scan_custom(raw_matrix);
+
+    debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
+
+    matrix_scan_quantum();
+    return 1;
+}
diff --git a/quantum/split_common/matrix.c b/quantum/split_common/matrix.c
index 58602af859..ed1ff5acf3 100644
--- a/quantum/split_common/matrix.c
+++ b/quantum/split_common/matrix.c
@@ -41,8 +41,8 @@ static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 #endif
 
 /* matrix state(1:on, 0:off) */
-static matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
-static matrix_row_t matrix[MATRIX_ROWS];      // debounced values
+extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
+extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
 
 // row offsets for each hand
 uint8_t thisHand, thatHand;
@@ -50,12 +50,6 @@ uint8_t thisHand, thatHand;
 // user-defined overridable functions
 __attribute__((weak)) void matrix_slave_scan_user(void) {}
 
-// helper functions
-
-inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
-
-inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
-
 // matrix code
 
 #ifdef DIRECT_PINS