[linux-2.6-block.git] / drivers / leds / led-class-flash.c

/*
 * LED Flash class interface
 *
 * Copyright (C) 2015 Samsung Electronics Co., Ltd.
 * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/led-class-flash.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "leds.h"

#define has_flash_op(fled_cdev, op)				\
	(fled_cdev && fled_cdev->ops->op)

#define call_flash_op(fled_cdev, op, args...)		\
	((has_flash_op(fled_cdev, op)) ?			\
			(fled_cdev->ops->op(fled_cdev, args)) :	\
			-EINVAL)

static const char * const led_flash_fault_names[] = {
	"led-over-voltage",
	"flash-timeout-exceeded",
	"controller-over-temperature",
	"controller-short-circuit",
	"led-power-supply-over-current",
	"indicator-led-fault",
	"led-under-voltage",
	"controller-under-voltage",
	"led-over-temperature",
};

static ssize_t flash_brightness_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t size)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	unsigned long state;
	ssize_t ret;

	mutex_lock(&led_cdev->led_access);

	if (led_sysfs_is_disabled(led_cdev)) {
		ret = -EBUSY;
		goto unlock;
	}

	ret = kstrtoul(buf, 10, &state);
	if (ret)
		goto unlock;

	ret = led_set_flash_brightness(fled_cdev, state);
	if (ret < 0)
		goto unlock;

	ret = size;
unlock:
	mutex_unlock(&led_cdev->led_access);
	return ret;
}

static ssize_t flash_brightness_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);

	/* no lock needed for this */
	led_update_flash_brightness(fled_cdev);

	return sprintf(buf, "%u\n", fled_cdev->brightness.val);
}
static DEVICE_ATTR_RW(flash_brightness);

static ssize_t max_flash_brightness_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);

	return sprintf(buf, "%u\n", fled_cdev->brightness.max);
}
static DEVICE_ATTR_RO(max_flash_brightness);

static ssize_t flash_strobe_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t size)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	unsigned long state;
	ssize_t ret = -EINVAL;

	mutex_lock(&led_cdev->led_access);

	if (led_sysfs_is_disabled(led_cdev)) {
		ret = -EBUSY;
		goto unlock;
	}

	ret = kstrtoul(buf, 10, &state);
	if (ret)
		goto unlock;

	if (state > 1) {
		ret = -EINVAL;
		goto unlock;
	}

	ret = led_set_flash_strobe(fled_cdev, state);
	if (ret < 0)
		goto unlock;
	ret = size;
unlock:
	mutex_unlock(&led_cdev->led_access);
	return ret;
}

static ssize_t flash_strobe_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	bool state;
	int ret;

	/* no lock needed for this */
	ret = led_get_flash_strobe(fled_cdev, &state);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%u\n", state);
}
static DEVICE_ATTR_RW(flash_strobe);

static ssize_t flash_timeout_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t size)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	unsigned long flash_timeout;
	ssize_t ret;

	mutex_lock(&led_cdev->led_access);

	if (led_sysfs_is_disabled(led_cdev)) {
		ret = -EBUSY;
		goto unlock;
	}

	ret = kstrtoul(buf, 10, &flash_timeout);
	if (ret)
		goto unlock;

	ret = led_set_flash_timeout(fled_cdev, flash_timeout);
	if (ret < 0)
		goto unlock;

	ret = size;
unlock:
	mutex_unlock(&led_cdev->led_access);
	return ret;
}

static ssize_t flash_timeout_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);

	return sprintf(buf, "%u\n", fled_cdev->timeout.val);
}
static DEVICE_ATTR_RW(flash_timeout);

static ssize_t max_flash_timeout_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);

	return sprintf(buf, "%u\n", fled_cdev->timeout.max);
}
static DEVICE_ATTR_RO(max_flash_timeout);

static ssize_t flash_fault_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	u32 fault, mask = 0x1;
	char *pbuf = buf;
	int i, ret, buf_len;

	ret = led_get_flash_fault(fled_cdev, &fault);
	if (ret < 0)
		return -EINVAL;

	*buf = '\0';

	for (i = 0; i < LED_NUM_FLASH_FAULTS; ++i) {
		if (fault & mask) {
			buf_len = sprintf(pbuf, "%s ",
					  led_flash_fault_names[i]);
			pbuf += buf_len;
		}
		mask <<= 1;
	}

	return sprintf(buf, "%s\n", buf);
}
static DEVICE_ATTR_RO(flash_fault);

static struct attribute *led_flash_strobe_attrs[] = {
	&dev_attr_flash_strobe.attr,
	NULL,
};

static struct attribute *led_flash_timeout_attrs[] = {
	&dev_attr_flash_timeout.attr,
	&dev_attr_max_flash_timeout.attr,
	NULL,
};

static struct attribute *led_flash_brightness_attrs[] = {
	&dev_attr_flash_brightness.attr,
	&dev_attr_max_flash_brightness.attr,
	NULL,
};

static struct attribute *led_flash_fault_attrs[] = {
	&dev_attr_flash_fault.attr,
	NULL,
};

static const struct attribute_group led_flash_strobe_group = {
	.attrs = led_flash_strobe_attrs,
};

static const struct attribute_group led_flash_timeout_group = {
	.attrs = led_flash_timeout_attrs,
};

static const struct attribute_group led_flash_brightness_group = {
	.attrs = led_flash_brightness_attrs,
};

static const struct attribute_group led_flash_fault_group = {
	.attrs = led_flash_fault_attrs,
};

static void led_flash_resume(struct led_classdev *led_cdev)
{
	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);

	call_flash_op(fled_cdev, flash_brightness_set,
					fled_cdev->brightness.val);
	call_flash_op(fled_cdev, timeout_set, fled_cdev->timeout.val);
}

static void led_flash_init_sysfs_groups(struct led_classdev_flash *fled_cdev)
{
	struct led_classdev *led_cdev = &fled_cdev->led_cdev;
	const struct led_flash_ops *ops = fled_cdev->ops;
	const struct attribute_group **flash_groups = fled_cdev->sysfs_groups;

	int num_sysfs_groups = 0;

	flash_groups[num_sysfs_groups++] = &led_flash_strobe_group;

	if (ops->flash_brightness_set)
		flash_groups[num_sysfs_groups++] = &led_flash_brightness_group;

	if (ops->timeout_set)
		flash_groups[num_sysfs_groups++] = &led_flash_timeout_group;

	if (ops->fault_get)
		flash_groups[num_sysfs_groups++] = &led_flash_fault_group;

	led_cdev->groups = flash_groups;
}

int led_classdev_flash_register(struct device *parent,
				struct led_classdev_flash *fled_cdev)
{
	struct led_classdev *led_cdev;
	const struct led_flash_ops *ops;
	int ret;

	if (!fled_cdev)
		return -EINVAL;

	led_cdev = &fled_cdev->led_cdev;

	if (led_cdev->flags & LED_DEV_CAP_FLASH) {
		if (!led_cdev->brightness_set_blocking)
			return -EINVAL;

		ops = fled_cdev->ops;
		if (!ops || !ops->strobe_set)
			return -EINVAL;

		led_cdev->flash_resume = led_flash_resume;

		/* Select the sysfs attributes to be created for the device */
		led_flash_init_sysfs_groups(fled_cdev);
	}

	/* Register led class device */
	ret = led_classdev_register(parent, led_cdev);
	if (ret < 0)
		return ret;

	return 0;
}
EXPORT_SYMBOL_GPL(led_classdev_flash_register);

void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev)
{
	if (!fled_cdev)
		return;

	led_classdev_unregister(&fled_cdev->led_cdev);
}
EXPORT_SYMBOL_GPL(led_classdev_flash_unregister);

static void led_clamp_align(struct led_flash_setting *s)
{
	u32 v, offset;

	v = s->val + s->step / 2;
	v = clamp(v, s->min, s->max);
	offset = v - s->min;
	offset = s->step * (offset / s->step);
	s->val = s->min + offset;
}

int led_set_flash_timeout(struct led_classdev_flash *fled_cdev, u32 timeout)
{
	struct led_classdev *led_cdev = &fled_cdev->led_cdev;
	struct led_flash_setting *s = &fled_cdev->timeout;

	s->val = timeout;
	led_clamp_align(s);

	if (!(led_cdev->flags & LED_SUSPENDED))
		return call_flash_op(fled_cdev, timeout_set, s->val);

	return 0;
}
EXPORT_SYMBOL_GPL(led_set_flash_timeout);

int led_get_flash_fault(struct led_classdev_flash *fled_cdev, u32 *fault)
{
	return call_flash_op(fled_cdev, fault_get, fault);
}
EXPORT_SYMBOL_GPL(led_get_flash_fault);

int led_set_flash_brightness(struct led_classdev_flash *fled_cdev,
				u32 brightness)
{
	struct led_classdev *led_cdev = &fled_cdev->led_cdev;
	struct led_flash_setting *s = &fled_cdev->brightness;

	s->val = brightness;
	led_clamp_align(s);

	if (!(led_cdev->flags & LED_SUSPENDED))
		return call_flash_op(fled_cdev, flash_brightness_set, s->val);

	return 0;
}
EXPORT_SYMBOL_GPL(led_set_flash_brightness);

int led_update_flash_brightness(struct led_classdev_flash *fled_cdev)
{
	struct led_flash_setting *s = &fled_cdev->brightness;
	u32 brightness;

	if (has_flash_op(fled_cdev, flash_brightness_get)) {
		int ret = call_flash_op(fled_cdev, flash_brightness_get,
						&brightness);
		if (ret < 0)
			return ret;

		s->val = brightness;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(led_update_flash_brightness);

MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
MODULE_DESCRIPTION("LED Flash class interface");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
7aea8389 JA	1	/*
	2	* LED Flash class interface
	3	*
	4	* Copyright (C) 2015 Samsung Electronics Co., Ltd.
	5	* Author: Jacek Anaszewski <j.anaszewski@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/device.h>
	13	#include <linux/init.h>
	14	#include <linux/led-class-flash.h>
	15	#include <linux/leds.h>
	16	#include <linux/module.h>
	17	#include <linux/slab.h>
	18	#include "leds.h"
	19
	20	#define has_flash_op(fled_cdev, op) \
	21	(fled_cdev && fled_cdev->ops->op)
	22
	23	#define call_flash_op(fled_cdev, op, args...) \
	24	((has_flash_op(fled_cdev, op)) ? \
	25	(fled_cdev->ops->op(fled_cdev, args)) : \
	26	-EINVAL)
	27
	28	static const char * const led_flash_fault_names[] = {
	29	"led-over-voltage",
	30	"flash-timeout-exceeded",
	31	"controller-over-temperature",
	32	"controller-short-circuit",
	33	"led-power-supply-over-current",
	34	"indicator-led-fault",
	35	"led-under-voltage",
	36	"controller-under-voltage",
	37	"led-over-temperature",
	38	};
	39
	40	static ssize_t flash_brightness_store(struct device *dev,
	41	struct device_attribute attr, const char buf, size_t size)
	42	{
	43	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	44	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	45	unsigned long state;
	46	ssize_t ret;
	47
	48	mutex_lock(&led_cdev->led_access);
	49
	50	if (led_sysfs_is_disabled(led_cdev)) {
	51	ret = -EBUSY;
	52	goto unlock;
	53	}
	54
	55	ret = kstrtoul(buf, 10, &state);
	56	if (ret)
	57	goto unlock;
	58
	59	ret = led_set_flash_brightness(fled_cdev, state);
	60	if (ret < 0)
	61	goto unlock;
	62
	63	ret = size;
	64	unlock:
65	mutex_unlock(&led_cdev->led_access);
66	return ret;
67	}
68
69	static ssize_t flash_brightness_show(struct device *dev,
70	struct device_attribute attr, char buf)
71	{
72	struct led_classdev *led_cdev = dev_get_drvdata(dev);
73	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
74
75	/* no lock needed for this */
76	led_update_flash_brightness(fled_cdev);
77
78	return sprintf(buf, "%u\n", fled_cdev->brightness.val);
79	}
80	static DEVICE_ATTR_RW(flash_brightness);
81
82	static ssize_t max_flash_brightness_show(struct device *dev,
83	struct device_attribute attr, char buf)
84	{
85	struct led_classdev *led_cdev = dev_get_drvdata(dev);
86	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
87
88	return sprintf(buf, "%u\n", fled_cdev->brightness.max);
89	}
90	static DEVICE_ATTR_RO(max_flash_brightness);
91
92	static ssize_t flash_strobe_store(struct device *dev,
93	struct device_attribute attr, const char buf, size_t size)
94	{
95	struct led_classdev *led_cdev = dev_get_drvdata(dev);
96	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
97	unsigned long state;
98	ssize_t ret = -EINVAL;
99
100	mutex_lock(&led_cdev->led_access);
101
102	if (led_sysfs_is_disabled(led_cdev)) {
103	ret = -EBUSY;
104	goto unlock;
105	}
106
107	ret = kstrtoul(buf, 10, &state);
108	if (ret)
109	goto unlock;
110
abc19635	111	if (state > 1) {
7aea8389 JA	112	ret = -EINVAL;
	113	goto unlock;
	114	}
	115
	116	ret = led_set_flash_strobe(fled_cdev, state);
	117	if (ret < 0)
	118	goto unlock;
	119	ret = size;
	120	unlock:
	121	mutex_unlock(&led_cdev->led_access);
	122	return ret;
	123	}
	124
	125	static ssize_t flash_strobe_show(struct device *dev,
	126	struct device_attribute attr, char buf)
	127	{
	128	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	129	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	130	bool state;
	131	int ret;
	132
	133	/* no lock needed for this */
	134	ret = led_get_flash_strobe(fled_cdev, &state);
	135	if (ret < 0)
	136	return ret;
	137
	138	return sprintf(buf, "%u\n", state);
	139	}
	140	static DEVICE_ATTR_RW(flash_strobe);
	141
	142	static ssize_t flash_timeout_store(struct device *dev,
	143	struct device_attribute attr, const char buf, size_t size)
	144	{
	145	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	146	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	147	unsigned long flash_timeout;
	148	ssize_t ret;
	149
	150	mutex_lock(&led_cdev->led_access);
	151
	152	if (led_sysfs_is_disabled(led_cdev)) {
	153	ret = -EBUSY;
	154	goto unlock;
	155	}
	156
	157	ret = kstrtoul(buf, 10, &flash_timeout);
	158	if (ret)
	159	goto unlock;
	160
	161	ret = led_set_flash_timeout(fled_cdev, flash_timeout);
	162	if (ret < 0)
	163	goto unlock;
	164
	165	ret = size;
	166	unlock:
	167	mutex_unlock(&led_cdev->led_access);
	168	return ret;
	169	}
	170
	171	static ssize_t flash_timeout_show(struct device *dev,
	172	struct device_attribute attr, char buf)
	173	{
	174	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	175	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
176
177	return sprintf(buf, "%u\n", fled_cdev->timeout.val);
178	}
179	static DEVICE_ATTR_RW(flash_timeout);
180
181	static ssize_t max_flash_timeout_show(struct device *dev,
182	struct device_attribute attr, char buf)
183	{
184	struct led_classdev *led_cdev = dev_get_drvdata(dev);
185	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
186
187	return sprintf(buf, "%u\n", fled_cdev->timeout.max);
188	}
189	static DEVICE_ATTR_RO(max_flash_timeout);
190
191	static ssize_t flash_fault_show(struct device *dev,
192	struct device_attribute attr, char buf)
193	{
194	struct led_classdev *led_cdev = dev_get_drvdata(dev);
195	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
196	u32 fault, mask = 0x1;
197	char *pbuf = buf;
198	int i, ret, buf_len;
199
200	ret = led_get_flash_fault(fled_cdev, &fault);
201	if (ret < 0)
202	return -EINVAL;
203
204	*buf = '\0';
205
206	for (i = 0; i < LED_NUM_FLASH_FAULTS; ++i) {
207	if (fault & mask) {
208	buf_len = sprintf(pbuf, "%s ",
209	led_flash_fault_names[i]);
210	pbuf += buf_len;
211	}
212	mask <<= 1;
213	}
214
215	return sprintf(buf, "%s\n", buf);
216	}
217	static DEVICE_ATTR_RO(flash_fault);
218
7aea8389 JA	219	static struct attribute *led_flash_strobe_attrs[] = {
	220	&dev_attr_flash_strobe.attr,
	221	NULL,
	222	};
	223
	224	static struct attribute *led_flash_timeout_attrs[] = {
	225	&dev_attr_flash_timeout.attr,
	226	&dev_attr_max_flash_timeout.attr,
	227	NULL,
	228	};
	229
	230	static struct attribute *led_flash_brightness_attrs[] = {
	231	&dev_attr_flash_brightness.attr,
	232	&dev_attr_max_flash_brightness.attr,
	233	NULL,
	234	};
	235
	236	static struct attribute *led_flash_fault_attrs[] = {
	237	&dev_attr_flash_fault.attr,
	238	NULL,
	239	};
	240
7aea8389 JA	241	static const struct attribute_group led_flash_strobe_group = {
	242	.attrs = led_flash_strobe_attrs,
	243	};
	244
	245	static const struct attribute_group led_flash_timeout_group = {
	246	.attrs = led_flash_timeout_attrs,
	247	};
	248
	249	static const struct attribute_group led_flash_brightness_group = {
	250	.attrs = led_flash_brightness_attrs,
	251	};
	252
	253	static const struct attribute_group led_flash_fault_group = {
	254	.attrs = led_flash_fault_attrs,
	255	};
	256
7aea8389 JA	257	static void led_flash_resume(struct led_classdev *led_cdev)
	258	{
	259	struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev);
	260
	261	call_flash_op(fled_cdev, flash_brightness_set,
	262	fled_cdev->brightness.val);
	263	call_flash_op(fled_cdev, timeout_set, fled_cdev->timeout.val);
	264	}
	265
	266	static void led_flash_init_sysfs_groups(struct led_classdev_flash *fled_cdev)
	267	{
	268	struct led_classdev *led_cdev = &fled_cdev->led_cdev;
	269	const struct led_flash_ops *ops = fled_cdev->ops;
	270	const struct attribute_group **flash_groups = fled_cdev->sysfs_groups;
	271
	272	int num_sysfs_groups = 0;
	273
	274	flash_groups[num_sysfs_groups++] = &led_flash_strobe_group;
	275
	276	if (ops->flash_brightness_set)
	277	flash_groups[num_sysfs_groups++] = &led_flash_brightness_group;
	278
	279	if (ops->timeout_set)
	280	flash_groups[num_sysfs_groups++] = &led_flash_timeout_group;
	281
	282	if (ops->fault_get)
	283	flash_groups[num_sysfs_groups++] = &led_flash_fault_group;
	284
7aea8389 JA	285	led_cdev->groups = flash_groups;
	286	}
	287
	288	int led_classdev_flash_register(struct device *parent,
	289	struct led_classdev_flash *fled_cdev)
	290	{
	291	struct led_classdev *led_cdev;
	292	const struct led_flash_ops *ops;
	293	int ret;
	294
	295	if (!fled_cdev)
	296	return -EINVAL;
	297
	298	led_cdev = &fled_cdev->led_cdev;
	299
	300	if (led_cdev->flags & LED_DEV_CAP_FLASH) {
437a4240	301	if (!led_cdev->brightness_set_blocking)
7aea8389 JA	302	return -EINVAL;
	303
	304	ops = fled_cdev->ops;
	305	if (!ops \|\| !ops->strobe_set)
	306	return -EINVAL;
	307
	308	led_cdev->flash_resume = led_flash_resume;
	309
	310	/* Select the sysfs attributes to be created for the device */
	311	led_flash_init_sysfs_groups(fled_cdev);
	312	}
	313
	314	/* Register led class device */
	315	ret = led_classdev_register(parent, led_cdev);
	316	if (ret < 0)
	317	return ret;
	318
7aea8389 JA	319	return 0;
	320	}
	321	EXPORT_SYMBOL_GPL(led_classdev_flash_register);
	322
	323	void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev)
	324	{
	325	if (!fled_cdev)
	326	return;
	327
	328	led_classdev_unregister(&fled_cdev->led_cdev);
	329	}
	330	EXPORT_SYMBOL_GPL(led_classdev_flash_unregister);
	331
	332	static void led_clamp_align(struct led_flash_setting *s)
	333	{
	334	u32 v, offset;
	335
	336	v = s->val + s->step / 2;
	337	v = clamp(v, s->min, s->max);
	338	offset = v - s->min;
	339	offset = s->step * (offset / s->step);
	340	s->val = s->min + offset;
	341	}
	342
	343	int led_set_flash_timeout(struct led_classdev_flash *fled_cdev, u32 timeout)
	344	{
	345	struct led_classdev *led_cdev = &fled_cdev->led_cdev;
	346	struct led_flash_setting *s = &fled_cdev->timeout;
	347
	348	s->val = timeout;
	349	led_clamp_align(s);
	350
	351	if (!(led_cdev->flags & LED_SUSPENDED))
	352	return call_flash_op(fled_cdev, timeout_set, s->val);
	353
	354	return 0;
	355	}
	356	EXPORT_SYMBOL_GPL(led_set_flash_timeout);
	357
	358	int led_get_flash_fault(struct led_classdev_flash fled_cdev, u32 fault)
	359	{
	360	return call_flash_op(fled_cdev, fault_get, fault);
	361	}
	362	EXPORT_SYMBOL_GPL(led_get_flash_fault);
	363
	364	int led_set_flash_brightness(struct led_classdev_flash *fled_cdev,
	365	u32 brightness)
	366	{
	367	struct led_classdev *led_cdev = &fled_cdev->led_cdev;
	368	struct led_flash_setting *s = &fled_cdev->brightness;
	369
	370	s->val = brightness;
	371	led_clamp_align(s);
	372
	373	if (!(led_cdev->flags & LED_SUSPENDED))
	374	return call_flash_op(fled_cdev, flash_brightness_set, s->val);
	375
	376	return 0;
	377	}
	378	EXPORT_SYMBOL_GPL(led_set_flash_brightness);
	379
	380	int led_update_flash_brightness(struct led_classdev_flash *fled_cdev)
	381	{
	382	struct led_flash_setting *s = &fled_cdev->brightness;
383	u32 brightness;
384
385	if (has_flash_op(fled_cdev, flash_brightness_get)) {
386	int ret = call_flash_op(fled_cdev, flash_brightness_get,
387	&brightness);
388	if (ret < 0)
389	return ret;
390
391	s->val = brightness;
392	}
393
394	return 0;
395	}
396	EXPORT_SYMBOL_GPL(led_update_flash_brightness);
397
398	MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
399	MODULE_DESCRIPTION("LED Flash class interface");
400	MODULE_LICENSE("GPL v2");