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leds: Improve and export led_update_brightness

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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>
This commit is contained in:
Jacek Anaszewski 2014-08-20 06:41:55 -07:00 • committed by Bryan Wu
parent 914ae25a62
commit 3ef7de5304
3 changed files with 26 additions and 6 deletions
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6
drivers/leds/led-class.c
View file

@ -24,12 +24,6 @@
static struct class *leds_class;
static void led_update_brightness(struct led_classdev *led_cdev)
{
if (led_cdev->brightness_get)
led_cdev->brightness = led_cdev->brightness_get(led_cdev);
}
static ssize_t brightness_show(struct device *dev,
struct device_attribute *attr, char *buf)
{