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leds: Add support for setting brightness in a synchronous way

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There are use cases when setting a LED brightness has to
have immediate effect (e.g. setting a torch LED brightness).
This patch extends LED subsystem to support such operations.
The LED subsystem internal API __led_set_brightness is changed
to led_set_brightness_async and new led_set_brightness_sync API
is added.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Jacek Anaszewski
2014-11-14 02:50:18 -08:00
committed by Bryan Wu
parent acd899e4f3
commit 4d71a4a12b
10 changed files with 62 additions and 26 deletions
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2
drivers/leds/trigger/ledtrig-heartbeat.c
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@@ -74,7 +74,7 @@ static void led_heartbeat_function(unsigned long data)
break;
}
__led_set_brightness(led_cdev, brightness);
led_set_brightness_async(led_cdev, brightness);
mod_timer(&heartbeat_data->timer, jiffies + delay);
}