leds: Improve and export led_update_brightness
authorJacek Anaszewski <j.anaszewski@samsung.com>
Wed, 20 Aug 2014 13:41:55 +0000 (06:41 -0700)
committerBryan Wu <cooloney@gmail.com>
Fri, 12 Sep 2014 21:01:54 +0000 (14:01 -0700)
commit3ef7de5304edf60d0b8674dd7cdacc104e15a93c
tree2af483fbfc67853ce5c8b3772fadb93c872b0d35
parent914ae25a62e77ebbfa0ce7cbc60edd01cc4d1d31
leds: Improve and export led_update_brightness

led_update_brightness helper function used to be exploited only locally
in the led-class.c module, where its result was being passed to the
brightness_show sysfs callback. With the introduction of v4l2-flash
subdevice the same functionality becomes required for reading current
brightness from a LED device. This patch adds checking of return value
of the brightness_get callback and moves the led_update_brightness()
function to the LED subsystem public API.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
drivers/leds/led-class.c
drivers/leds/led-core.c
include/linux/leds.h