Matrix_keypad with high capacity need a longer settle time after enable all columns. Add optional property to specify the settle time Signed-off-by: Markus Burri <markus.burri@xxxxxx> Reviewed-by: Manuel Traut <manuel.traut@xxxxxx> Tested-by: HeDong Zhao <hedong.zhao@xxxxxx> --- Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt index 570dc10..cf43fa0 100644 --- a/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt +++ b/Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt @@ -24,6 +24,8 @@ Optional Properties: - debounce-delay-ms: debounce interval in milliseconds - col-scan-delay-us: delay, measured in microseconds, that is needed before we can scan keypad after activating column gpio +- all-cols-on-delay-us: delay, measured in microseconds, that is needed + after activating all column gpios, default is no delay. - drive-inactive-cols: drive inactive columns during scan, default is to turn inactive columns into inputs. -- 2.39.5
