Core: Support inverted scan logic for optical switches (#19053)

1 files changed, 6 insertions, 4 deletions

diff --git a/quantum/matrix.c b/quantum/matrix.c
index db683104ed..0de65c6cdd 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -46,6 +46,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    define SPLIT_MUTABLE_COL const
 #endif
 
+#ifndef MATRIX_INPUT_PRESSED_STATE
+#    define MATRIX_INPUT_PRESSED_STATE 0
+#endif
+
 #ifdef DIRECT_PINS
 static SPLIT_MUTABLE pin_t direct_pins[ROWS_PER_HAND][MATRIX_COLS] = DIRECT_PINS;
 #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
@@ -93,7 +97,7 @@ static inline void setPinInputHigh_atomic(pin_t pin) {
 
 static inline uint8_t readMatrixPin(pin_t pin) {
     if (pin != NO_PIN) {
-        return readPin(pin);
+        return (readPin(pin) == MATRIX_INPUT_PRESSED_STATE) ? 0 : 1;
     } else {
         return 1;
     }
@@ -121,9 +125,7 @@ __attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[]
     matrix_row_t row_shifter = MATRIX_ROW_SHIFTER;
     for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++, row_shifter <<= 1) {
         pin_t pin = direct_pins[current_row][col_index];
-        if (pin != NO_PIN) {
-            current_row_value |= readPin(pin) ? 0 : row_shifter;
-        }
+        current_row_value |= readMatrixPin(pin) ? 0 : row_shifter;
     }
 
     // Update the matrix