From 7aea8389a77abf9fde254aca2434a605c7704f58 Mon Sep 17 00:00:00 2001 From: Jacek Anaszewski Date: Fri, 9 Jan 2015 07:22:51 -0800 Subject: 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 Acked-by: Kyungmin Park Cc: Richard Purdie Acked-by: Pavel Machek Signed-off-by: Bryan Wu --- drivers/leds/led-class.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/leds/led-class.c') 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); -- cgit