This driver doesn't use sleeping operations in .brightness_set method if can_sleep variable is not set. In that case it can be marked with LED_BRIGHTNESS_FAST flag. That flag allows changing brightness at high rates (over 100Hz). CC: Bryan Wu <cooloney@xxxxxxxxx> CC: Richard Purdie <rpurdie@xxxxxxxxx> CC: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx> CC: linux-leds@xxxxxxxxxxxxxxx CC: linux-kernel@xxxxxxxxxxxxxxx CC: Raphael Assenat <raph@xxxxxx> Signed-off-by: Stas Sergeev <stsp@xxxxxxxxxxxxxxxxxxxxx> --- drivers/leds/leds-gpio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 3af4f2b..0e1346c 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -138,6 +138,8 @@ static int create_gpio_led(const struct gpio_led *template, led_dat->cdev.brightness = state ? LED_FULL : LED_OFF; if (!template->retain_state_suspended) led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; + if (!led_dat->can_sleep) + led_dat->cdev.flags |= LED_BRIGHTNESS_FAST; ret = gpiod_direction_output(led_dat->gpiod, state); if (ret < 0) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-leds" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
