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| 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 /include/linux/leds.h | |
| parent | leds: leds-mc13783: Use of_get_child_by_name() instead of refcount hack (diff) | |
| download | linux-dev-7aea8389a77abf9fde254aca2434a605c7704f58.tar.xz linux-dev-7aea8389a77abf9fde254aca2434a605c7704f58.zip | |
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 'include/linux/leds.h')
| -rw-r--r-- | include/linux/leds.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h index cfceef32c9b3..f70f84f35674 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -46,6 +46,8 @@ struct led_classdev { #define LED_SYSFS_DISABLE (1 << 20) #define SET_BRIGHTNESS_ASYNC (1 << 21) #define SET_BRIGHTNESS_SYNC (1 << 22) +#define LED_DEV_CAP_FLASH (1 << 23) +#define LED_DEV_CAP_SYNC_STROBE (1 << 24) /* Set LED brightness level */ /* Must not sleep, use a workqueue if needed */ @@ -81,6 +83,7 @@ struct led_classdev { unsigned long blink_delay_on, blink_delay_off; struct timer_list blink_timer; int blink_brightness; + void (*flash_resume)(struct led_classdev *led_cdev); struct work_struct set_brightness_work; int delayed_set_value; |