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authorJacek Anaszewski <j.anaszewski@samsung.com>2015-01-09 07:22:51 -0800
committerBryan Wu <cooloney@gmail.com>2015-01-26 14:59:08 -0800
commit7aea8389a77abf9fde254aca2434a605c7704f58 (patch)
tree580f35fdeca75a9533329d85822ab32f89fce64a /drivers/leds/led-class.c
parent452bc149947bb31775f0dc6a637fcf792af88e60 (diff)
downloadlinux-7aea8389a77abf9fde254aca2434a605c7704f58.tar.bz2
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.c4
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);