diff options
| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-01-09 18:22:51 +0300 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2015-01-27 01:59:08 +0300 |
| commit | 7aea8389a77abf9fde254aca2434a605c7704f58 (patch) | |
| tree | 580f35fdeca75a9533329d85822ab32f89fce64a /drivers/leds/Kconfig | |
| parent | 452bc149947bb31775f0dc6a637fcf792af88e60 (diff) | |
| download | 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/Kconfig')
| -rw-r--r-- | drivers/leds/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a6c3d2f153f3..25b320d64e26 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -22,6 +22,16 @@ config LEDS_CLASS This option enables the led sysfs class in /sys/class/leds. You'll need this to do anything useful with LEDs. If unsure, say N. +config LEDS_CLASS_FLASH + tristate "LED Flash Class Support" + depends on LEDS_CLASS + help + This option enables the flash led sysfs class in /sys/class/leds. + It wrapps LED Class and adds flash LEDs specific sysfs attributes + and kernel internal API to it. You'll need this to provide support + for the flash related features of a LED device. It can be built + as a module. + comment "LED drivers" config LEDS_88PM860X |