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leds: delay led_set_brightness if stopping soft-blink

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Delay execution of led_set_brightness() if need to stop soft-blink
timer.

This allows led_set_brightness to be called in hard-irq context even if
soft-blink was activated on that LED.

Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
This commit is contained in:
Fabio Baltieri
2012-08-15 21:44:34 +08:00
committed by Bryan Wu
parent 490dcee9b4
commit d23a22a74f
5 changed files with 37 additions and 4 deletions
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16
drivers/leds/led-core.c
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@@ -103,13 +103,23 @@ void led_blink_set_oneshot(struct led_classdev *led_cdev,
}
EXPORT_SYMBOL(led_blink_set_oneshot);
void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
void led_stop_software_blink(struct led_classdev *led_cdev)
{
/* stop and clear soft-blink timer */
del_timer_sync(&led_cdev->blink_timer);
led_cdev->blink_delay_on = 0;
led_cdev->blink_delay_off = 0;
}
EXPORT_SYMBOL_GPL(led_stop_software_blink);
void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
/* delay brightness setting if need to stop soft-blink timer */
if (led_cdev->blink_delay_on || led_cdev->blink_delay_off) {
led_cdev->delayed_set_value = brightness;
schedule_work(&led_cdev->set_brightness_work);
return;
}
__led_set_brightness(led_cdev, brightness);
}