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Commit 7e9ffd81 authored by Mohan Pallaka's avatar Mohan Pallaka Committed by Matt Wagantall
Browse files

leds: led-class: add support for max_brightness store 



Add store interface for max_brightness to allow users
to change the maximum brightness to be supported by
the hardware.

Change-Id: I8b65debdc52ded24227483c4db21aaec63e27927
Signed-off-by: default avatarMohan Pallaka <mpallaka@codeaurora.org>
parent d93295a8

drivers/leds/led-class.c

+18 −3
Original line number Diff line number Diff line
@@ -46,8 +46,6 @@ static ssize_t brightness_store(struct device *dev, 
	if (ret)

		return ret;



	if (state == LED_OFF)

		led_trigger_remove(led_cdev);

	__led_set_brightness(led_cdev, state);



	return size;
@@ -61,7 +59,24 @@ static ssize_t max_brightness_show(struct device *dev, 


	return sprintf(buf, "%u\n", led_cdev->max_brightness);

}

static DEVICE_ATTR_RO(max_brightness);



static ssize_t max_brightness_store(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t size)

{

	struct led_classdev *led_cdev = dev_get_drvdata(dev);

	unsigned long state;

	ssize_t ret = -EINVAL;



	ret = kstrtoul(buf, 10, &state);

	if (ret)

		return ret;



	led_cdev->max_brightness = state;

	led_set_brightness(led_cdev, led_cdev->brightness);



	return size;

}

static DEVICE_ATTR_RW(max_brightness);



#ifdef CONFIG_LEDS_TRIGGERS

static DEVICE_ATTR(trigger, 0644, led_trigger_show, led_trigger_store);