The delay is retrieved from a device-tree property, so the duration is variable. fsleep guesses the best delay function based on duration. Link: https://www.kernel.org/doc/html/latest/timers/timers-howto.html Signed-off-by: Markus Burri <markus.burri@xxxxxx> Reviewed-by: Manuel Traut <manuel.traut@xxxxxx> Tested-by: HeDong Zhao <hedong.zhao@xxxxxx> --- drivers/input/keyboard/matrix_keypad.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/keyboard/matrix_keypad.c b/drivers/input/keyboard/matrix_keypad.c index a2ec9f6..e08d7d5 100644 --- a/drivers/input/keyboard/matrix_keypad.c +++ b/drivers/input/keyboard/matrix_keypad.c @@ -69,7 +69,7 @@ static void activate_col(struct matrix_keypad *keypad, int col, bool on) __activate_col(keypad, col, on); if (on && keypad->col_scan_delay_us) - udelay(keypad->col_scan_delay_us); + fsleep(keypad->col_scan_delay_us); } static void activate_all_cols(struct matrix_keypad *keypad, bool on) -- 2.39.5
