diff options
| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-01-09 07:22:51 -0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2015-01-26 14:59:08 -0800 |
| commit | 7aea8389a77abf9fde254aca2434a605c7704f58 (patch) | |
| tree | 580f35fdeca75a9533329d85822ab32f89fce64a /drivers/leds/led-class.c | |
| parent | 452bc149947bb31775f0dc6a637fcf792af88e60 (diff) | |
| download | linux-7aea8389a77abf9fde254aca2434a605c7704f58.tar.gz linux-7aea8389a77abf9fde254aca2434a605c7704f58.tar.xz | |
leds: Add LED Flash class extension to the LED subsystem
Some LED devices support two operation modes - torch and flash.
This patch provides support for flash LED devices in the LED subsystem
by introducing new sysfs attributes and kernel internal interface.
The attributes being introduced are: flash_brightness, flash_strobe,
flash_timeout, max_flash_timeout, max_flash_brightness, flash_fault,
flash_sync_strobe and available_sync_leds. All the flash related
features are placed in a separate module.
The modifications aim to be compatible with V4L2 framework requirements
related to the flash devices management. The design assumes that V4L2
sub-device can take of the LED class device control and communicate
with it through the kernel internal interface. When V4L2 Flash sub-device
file is opened, the LED class device sysfs interface is made
unavailable.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/led-class.c')
| -rw-r--r-- | drivers/leds/led-class.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 291ca45ce8ba..795ec994c663 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -179,6 +179,10 @@ EXPORT_SYMBOL_GPL(led_classdev_suspend); void led_classdev_resume(struct led_classdev *led_cdev) { led_cdev->brightness_set(led_cdev, led_cdev->brightness); + + if (led_cdev->flash_resume) + led_cdev->flash_resume(led_cdev); + led_cdev->flags &= ~LED_SUSPENDED; } EXPORT_SYMBOL_GPL(led_classdev_resume); |