diff options
| author |   Stas Sergeev <stsp@list.ru> | 2015-05-14 08:24:02 -0700 |
|---|---|---|
| committer |   Bryan Wu <cooloney@gmail.com> | 2015-05-25 13:26:47 -0700 |
| commit | 76931edd54f87d1e49536cd068df4783fae24d45 (patch) | |
| tree | b9156a89d62a210dccc24f958a9b34be0891cd47 /drivers/leds | |
| parent | Documentation: leds-lp5523: describe master fader attributes (diff) | |
| download | linux-dev-76931edd54f87d1e49536cd068df4783fae24d45.tar.xz linux-dev-76931edd54f87d1e49536cd068df4783fae24d45.zip | |
leds: fix brightness changing when software blinking is active
The following sequence:
echo timer >/sys/class/leds/<name>/trigger
echo 1 >/sys/class/leds/<name>/brightness
should change the ON brightness for blinking.
The function led_set_brightness() was mistakenly initiating the
delayed blink stop procedure, which resulted in no blinking with
the timer trigger still active.
This patch fixes the problem by changing led_set_brightness()
to not initiate the delayed blink stop when brightness is not 0.
CC: Richard Purdie <rpurdie@rpsys.net>
CC: Kyungmin Park <kyungmin.park@samsung.com>
CC: linux-leds@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/led-class.c | 5 | ||||
| -rw-r--r-- | drivers/leds/led-core.c | 5 |
2 files changed, 8 insertions, 2 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 728681debdbe..adc38d14576b 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -121,6 +121,11 @@ static void led_timer_function(unsigned long data) brightness = led_get_brightness(led_cdev); if (!brightness) { /* Time to switch the LED on. */ + if (led_cdev->delayed_set_value) { + led_cdev->blink_brightness = + led_cdev->delayed_set_value; + led_cdev->delayed_set_value = 0; + } brightness = led_cdev->blink_brightness; delay = led_cdev->blink_delay_on; } else { diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index 9886dace5ad2..549de7e24cfd 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -119,10 +119,11 @@ void led_set_brightness(struct led_classdev *led_cdev, { int ret = 0; - /* delay brightness setting if need to stop soft-blink timer */ + /* delay brightness if soft-blink is active */ if (led_cdev->blink_delay_on || led_cdev->blink_delay_off) { led_cdev->delayed_set_value = brightness; - schedule_work(&led_cdev->set_brightness_work); + if (brightness == LED_OFF) + schedule_work(&led_cdev->set_brightness_work); return; } |