Add support for driving unselected row/col. (#16278)

1 files changed, 15 insertions, 0 deletions

diff --git a/quantum/matrix.c b/quantum/matrix.c
index 483d518ec..8596c2eab 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -82,6 +82,13 @@ static inline void setPinOutput_writeLow(pin_t pin) {
     }
 }
 
+static inline void setPinOutput_writeHigh(pin_t pin) {
+    ATOMIC_BLOCK_FORCEON {
+        setPinOutput(pin);
+        writePinHigh(pin);
+    }
+}
+
 static inline void setPinInputHigh_atomic(pin_t pin) {
     ATOMIC_BLOCK_FORCEON { setPinInputHigh(pin); }
 }
@@ -141,7 +148,11 @@ static bool select_row(uint8_t row) {
 static void unselect_row(uint8_t row) {
     pin_t pin = row_pins[row];
     if (pin != NO_PIN) {
+#            ifdef MATRIX_UNSELECT_DRIVE_HIGH
+        setPinOutput_writeHigh(pin);
+#            else
         setPinInputHigh_atomic(pin);
+#            endif
     }
 }
 
@@ -200,7 +211,11 @@ static bool select_col(uint8_t col) {
 static void unselect_col(uint8_t col) {
     pin_t pin = col_pins[col];
     if (pin != NO_PIN) {
+#            ifdef MATRIX_UNSELECT_DRIVE_HIGH
+        setPinOutput_writeHigh(pin);
+#            else
         setPinInputHigh_atomic(pin);
+#            endif
     }
 }