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| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-01-09 16:22:51 +0100 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2015-01-26 23:59:08 +0100 |
| commit | 7aea8389a77abf9fde254aca2434a605c7704f58 (patch) | |
| tree | 580f35fdeca75a9533329d85822ab32f89fce64a /drivers/soc | |
| parent | leds: leds-mc13783: Use of_get_child_by_name() instead of refcount hack (diff) | |
| download | linux-7aea8389a77abf9fde254aca2434a605c7704f58.tar.xz linux-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 'drivers/soc')
0 files changed, 0 insertions, 0 deletions