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 Signed-off-by: Stas Sergeev <stsp@xxxxxxxxxxxxxxxxxxxxx> --- drivers/leds/leds-pwm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/leds/leds-pwm.c b/drivers/leds/leds-pwm.c index 1d07e3e..82d01e5 100644 --- a/drivers/leds/leds-pwm.c +++ b/drivers/leds/leds-pwm.c @@ -124,6 +124,8 @@ static int led_pwm_add(struct device *dev, struct led_pwm_priv *priv, led_data->can_sleep = pwm_can_sleep(led_data->pwm); if (led_data->can_sleep) INIT_WORK(&led_data->work, led_pwm_work); + else + led_data->cdev.flags |= LED_BRIGHTNESS_FAST; led_data->period = pwm_get_period(led_data->pwm); if (!led_data->period && (led->pwm_period_ns > 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
