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| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-10-19 10:04:01 +0300 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-01-04 11:57:30 +0300 |
| commit | 1afcadfcd184c3b52e38bae15c247a5fa4a0e054 (patch) | |
| tree | 6e94c39adb855e8309f97a7d79fbad19bcffda96 | |
| parent | 81fe8e5b73e3f4de578ac7f53c1d956d4f58b8d4 (diff) | |
| download | linux-1afcadfcd184c3b52e38bae15c247a5fa4a0e054.tar.xz | |
leds: core: Use set_brightness_work for the blocking op
This patch makes LED core capable of setting brightness for drivers
that implement brightness_set_blocking op. It removes from LED class
drivers responsibility for using work queues on their own.
In order to achieve this set_brightness_delayed callback is being
modified to directly call one of available ops for brightness setting.
led_set_brightness_async() function didn't set brightness in an
asynchronous way in all cases. It was mistakenly assuming that all
LED subsystem drivers used work queue in their brightness_set op,
whereas only half of them did that. Since it has no users now,
it is being removed.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
| -rw-r--r-- | drivers/leds/led-core.c | 12 | ||||
| -rw-r--r-- | drivers/leds/leds.h | 10 | ||||
| -rw-r--r-- | include/linux/leds.h | 2 |
3 files changed, 12 insertions, 12 deletions
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index 3d168592db65..f57a96cb7b7d 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -83,6 +83,7 @@ static void set_brightness_delayed(struct work_struct *ws) { struct led_classdev *led_cdev = container_of(ws, struct led_classdev, set_brightness_work); + int ret = 0; if (led_cdev->flags & LED_BLINK_DISABLE) { led_cdev->delayed_set_value = LED_OFF; @@ -90,7 +91,16 @@ static void set_brightness_delayed(struct work_struct *ws) led_cdev->flags &= ~LED_BLINK_DISABLE; } - led_set_brightness_async(led_cdev, led_cdev->delayed_set_value); + if (led_cdev->brightness_set) + led_cdev->brightness_set(led_cdev, led_cdev->delayed_set_value); + else if (led_cdev->brightness_set_blocking) + ret = led_cdev->brightness_set_blocking(led_cdev, + led_cdev->delayed_set_value); + else + ret = -ENOTSUPP; + if (ret < 0) + dev_err(led_cdev->dev, + "Setting an LED's brightness failed (%d)\n", ret); } static void led_set_software_blink(struct led_classdev *led_cdev, diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h index 8e252a2f8662..683a605fd33c 100644 --- a/drivers/leds/leds.h +++ b/drivers/leds/leds.h @@ -16,16 +16,6 @@ #include <linux/rwsem.h> #include <linux/leds.h> -static inline void led_set_brightness_async(struct led_classdev *led_cdev, - enum led_brightness value) -{ - value = min(value, led_cdev->max_brightness); - led_cdev->brightness = value; - - if (!(led_cdev->flags & LED_SUSPENDED)) - led_cdev->brightness_set(led_cdev, value); -} - static inline int led_set_brightness_sync(struct led_classdev *led_cdev, enum led_brightness value) { diff --git a/include/linux/leds.h b/include/linux/leds.h index 403fa8690295..b35e0f5b8d6c 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -158,7 +158,7 @@ extern void led_blink_set_oneshot(struct led_classdev *led_cdev, * * Set an LED's brightness, and, if necessary, cancel the * software blink timer that implements blinking when the - * hardware doesn't. + * hardware doesn't. This function is guaranteed not to sleep. */ extern void led_set_brightness(struct led_classdev *led_cdev, enum led_brightness brightness); |