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

/*
 * LED Triggers Core
 *
 * Copyright 2005-2007 Openedhand Ltd.
 *
 * Author: Richard Purdie <rpurdie@openedhand.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/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/timer.h>
#include <linux/rwsem.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include "leds.h"

/*
 * Nests outside led_cdev->trigger_lock
 */
static DECLARE_RWSEM(triggers_list_lock);
static LIST_HEAD(trigger_list);

 /* Used by LED Class */

ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_trigger *trig;
	int ret = count;

	mutex_lock(&led_cdev->led_access);

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

	if (sysfs_streq(buf, "none")) {
		led_trigger_remove(led_cdev);
		goto unlock;
	}

	down_read(&triggers_list_lock);
	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (sysfs_streq(buf, trig->name)) {
			down_write(&led_cdev->trigger_lock);
			led_trigger_set(led_cdev, trig);
			up_write(&led_cdev->trigger_lock);

			up_read(&triggers_list_lock);
			goto unlock;
		}
	}
	up_read(&triggers_list_lock);

unlock:
	mutex_unlock(&led_cdev->led_access);
	return ret;
}
EXPORT_SYMBOL_GPL(led_trigger_store);

ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
		char *buf)
{
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct led_trigger *trig;
	int len = 0;

	down_read(&triggers_list_lock);
	down_read(&led_cdev->trigger_lock);

	if (!led_cdev->trigger)
		len += sprintf(buf+len, "[none] ");
	else
		len += sprintf(buf+len, "none ");

	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (led_cdev->trigger && !strcmp(led_cdev->trigger->name,
							trig->name))
			len += sprintf(buf+len, "[%s] ", trig->name);
		else
			len += sprintf(buf+len, "%s ", trig->name);
	}
	up_read(&led_cdev->trigger_lock);
	up_read(&triggers_list_lock);

	len += sprintf(len+buf, "\n");
	return len;
}
EXPORT_SYMBOL_GPL(led_trigger_show);

/* Caller must ensure led_cdev->trigger_lock held */
void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
{
	unsigned long flags;
	char *event = NULL;
	char *envp[2];
	const char *name;

	name = trig ? trig->name : "none";
	event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);

	/* Remove any existing trigger */
	if (led_cdev->trigger) {
		write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
		list_del(&led_cdev->trig_list);
		write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock,
			flags);
		cancel_work_sync(&led_cdev->set_brightness_work);
		led_stop_software_blink(led_cdev);
		if (led_cdev->trigger->deactivate)
			led_cdev->trigger->deactivate(led_cdev);
		led_cdev->trigger = NULL;
		led_set_brightness(led_cdev, LED_OFF);
	}
	if (trig) {
		write_lock_irqsave(&trig->leddev_list_lock, flags);
		list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
		write_unlock_irqrestore(&trig->leddev_list_lock, flags);
		led_cdev->trigger = trig;
		if (trig->activate)
			trig->activate(led_cdev);
	}

	if (event) {
		envp[0] = event;
		envp[1] = NULL;
		kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp);
		kfree(event);
	}
}
EXPORT_SYMBOL_GPL(led_trigger_set);

void led_trigger_remove(struct led_classdev *led_cdev)
{
	down_write(&led_cdev->trigger_lock);
	led_trigger_set(led_cdev, NULL);
	up_write(&led_cdev->trigger_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_remove);

void led_trigger_set_default(struct led_classdev *led_cdev)
{
	struct led_trigger *trig;

	if (!led_cdev->default_trigger)
		return;

	down_read(&triggers_list_lock);
	down_write(&led_cdev->trigger_lock);
	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (!strcmp(led_cdev->default_trigger, trig->name))
			led_trigger_set(led_cdev, trig);
	}
	up_write(&led_cdev->trigger_lock);
	up_read(&triggers_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_set_default);

void led_trigger_rename_static(const char *name, struct led_trigger *trig)
{
	/* new name must be on a temporary string to prevent races */
	BUG_ON(name == trig->name);

	down_write(&triggers_list_lock);
	/* this assumes that trig->name was originaly allocated to
	 * non constant storage */
	strcpy((char *)trig->name, name);
	up_write(&triggers_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_rename_static);

/* LED Trigger Interface */

int led_trigger_register(struct led_trigger *trig)
{
	struct led_classdev *led_cdev;
	struct led_trigger *_trig;

	rwlock_init(&trig->leddev_list_lock);
	INIT_LIST_HEAD(&trig->led_cdevs);

	down_write(&triggers_list_lock);
	/* Make sure the trigger's name isn't already in use */
	list_for_each_entry(_trig, &trigger_list, next_trig) {
		if (!strcmp(_trig->name, trig->name)) {
			up_write(&triggers_list_lock);
			return -EEXIST;
		}
	}
	/* Add to the list of led triggers */
	list_add_tail(&trig->next_trig, &trigger_list);
	up_write(&triggers_list_lock);

	/* Register with any LEDs that have this as a default trigger */
	down_read(&leds_list_lock);
	list_for_each_entry(led_cdev, &leds_list, node) {
		down_write(&led_cdev->trigger_lock);
		if (!led_cdev->trigger && led_cdev->default_trigger &&
			    !strcmp(led_cdev->default_trigger, trig->name))
			led_trigger_set(led_cdev, trig);
		up_write(&led_cdev->trigger_lock);
	}
	up_read(&leds_list_lock);

	return 0;
}
EXPORT_SYMBOL_GPL(led_trigger_register);

void led_trigger_unregister(struct led_trigger *trig)
{
	struct led_classdev *led_cdev;

	if (list_empty_careful(&trig->next_trig))
		return;

	/* Remove from the list of led triggers */
	down_write(&triggers_list_lock);
	list_del_init(&trig->next_trig);
	up_write(&triggers_list_lock);

	/* Remove anyone actively using this trigger */
	down_read(&leds_list_lock);
	list_for_each_entry(led_cdev, &leds_list, node) {
		down_write(&led_cdev->trigger_lock);
		if (led_cdev->trigger == trig)
			led_trigger_set(led_cdev, NULL);
		up_write(&led_cdev->trigger_lock);
	}
	up_read(&leds_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_unregister);

static void devm_led_trigger_release(struct device *dev, void *res)
{
	led_trigger_unregister(*(struct led_trigger **)res);
}

int devm_led_trigger_register(struct device *dev,
			      struct led_trigger *trig)
{
	struct led_trigger **dr;
	int rc;

	dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
			  GFP_KERNEL);
	if (!dr)
		return -ENOMEM;

	*dr = trig;

	rc = led_trigger_register(trig);
	if (rc)
		devres_free(dr);
	else
		devres_add(dev, dr);

	return rc;
}
EXPORT_SYMBOL_GPL(devm_led_trigger_register);

/* Simple LED Tigger Interface */

void led_trigger_event(struct led_trigger *trig,
			enum led_brightness brightness)
{
	struct led_classdev *led_cdev;

	if (!trig)
		return;

	read_lock(&trig->leddev_list_lock);
	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list)
		led_set_brightness(led_cdev, brightness);
	read_unlock(&trig->leddev_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_event);

static void led_trigger_blink_setup(struct led_trigger *trig,
			     unsigned long *delay_on,
			     unsigned long *delay_off,
			     int oneshot,
			     int invert)
{
	struct led_classdev *led_cdev;

	if (!trig)
		return;

	read_lock(&trig->leddev_list_lock);
	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list) {
		if (oneshot)
			led_blink_set_oneshot(led_cdev, delay_on, delay_off,
					      invert);
		else
			led_blink_set(led_cdev, delay_on, delay_off);
	}
	read_unlock(&trig->leddev_list_lock);
}

void led_trigger_blink(struct led_trigger *trig,
		       unsigned long *delay_on,
		       unsigned long *delay_off)
{
	led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
}
EXPORT_SYMBOL_GPL(led_trigger_blink);

void led_trigger_blink_oneshot(struct led_trigger *trig,
			       unsigned long *delay_on,
			       unsigned long *delay_off,
			       int invert)
{
	led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
}
EXPORT_SYMBOL_GPL(led_trigger_blink_oneshot);

void led_trigger_register_simple(const char *name, struct led_trigger **tp)
{
	struct led_trigger *trig;
	int err;

	trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);

	if (trig) {
		trig->name = name;
		err = led_trigger_register(trig);
		if (err < 0) {
			kfree(trig);
			trig = NULL;
			pr_warn("LED trigger %s failed to register (%d)\n",
				name, err);
		}
	} else {
		pr_warn("LED trigger %s failed to register (no memory)\n",
			name);
	}
	*tp = trig;
}
EXPORT_SYMBOL_GPL(led_trigger_register_simple);

void led_trigger_unregister_simple(struct led_trigger *trig)
{
	if (trig)
		led_trigger_unregister(trig);
	kfree(trig);
}
EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);

MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("LED Triggers Core");
Commit	Line	Data
c3bc9956 RP	1	/*
	2	* LED Triggers Core
	3	*
f8a7c6fe	4	* Copyright 2005-2007 Openedhand Ltd.
c3bc9956 RP	5	*
	6	* Author: Richard Purdie <rpurdie@openedhand.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
	13
c3bc9956 RP	14	#include <linux/module.h>
c3bc9956 RP	15	#include <linux/kernel.h>
c3bc9956 RP	16	#include <linux/list.h>
	17	#include <linux/spinlock.h>
	18	#include <linux/device.h>
c3bc9956	19	#include <linux/timer.h>
dc47206e	20	#include <linux/rwsem.h>
c3bc9956	21	#include <linux/leds.h>
5a0e3ad6	22	#include <linux/slab.h>
c3bc9956 RP	23	#include "leds.h"
	24
	25	/*
	26	* Nests outside led_cdev->trigger_lock
	27	*/
dc47206e	28	static DECLARE_RWSEM(triggers_list_lock);
c3bc9956 RP	29	static LIST_HEAD(trigger_list);
c3bc9956 RP	30
4d404fd5 NM	31	/* Used by LED Class */
4d404fd5 NM	32
f8a7c6fe RP	33	ssize_t led_trigger_store(struct device dev, struct device_attribute attr,
f8a7c6fe RP	34	const char *buf, size_t count)
c3bc9956	35	{
f8a7c6fe	36	struct led_classdev *led_cdev = dev_get_drvdata(dev);
c3bc9956	37	struct led_trigger *trig;
acd899e4 JA	38	int ret = count;
	39
	40	mutex_lock(&led_cdev->led_access);
	41
	42	if (led_sysfs_is_disabled(led_cdev)) {
	43	ret = -EBUSY;
	44	goto unlock;
	45	}
c3bc9956	46
7296c33e	47	if (sysfs_streq(buf, "none")) {
0013b23d	48	led_trigger_remove(led_cdev);
acd899e4	49	goto unlock;
c3bc9956 RP	50	}
c3bc9956 RP	51
dc47206e	52	down_read(&triggers_list_lock);
c3bc9956	53	list_for_each_entry(trig, &trigger_list, next_trig) {
7296c33e	54	if (sysfs_streq(buf, trig->name)) {
dc47206e	55	down_write(&led_cdev->trigger_lock);
c3bc9956	56	led_trigger_set(led_cdev, trig);
dc47206e	57	up_write(&led_cdev->trigger_lock);
c3bc9956	58
dc47206e	59	up_read(&triggers_list_lock);
acd899e4	60	goto unlock;
c3bc9956 RP	61	}
c3bc9956 RP	62	}
dc47206e	63	up_read(&triggers_list_lock);
c3bc9956	64
acd899e4 JA	65	unlock:
	66	mutex_unlock(&led_cdev->led_access);
	67	return ret;
c3bc9956	68	}
4d404fd5	69	EXPORT_SYMBOL_GPL(led_trigger_store);
c3bc9956	70
f8a7c6fe RP	71	ssize_t led_trigger_show(struct device dev, struct device_attribute attr,
f8a7c6fe RP	72	char *buf)
c3bc9956	73	{
f8a7c6fe	74	struct led_classdev *led_cdev = dev_get_drvdata(dev);
c3bc9956 RP	75	struct led_trigger *trig;
	76	int len = 0;
	77
dc47206e RP	78	down_read(&triggers_list_lock);
dc47206e RP	79	down_read(&led_cdev->trigger_lock);
c3bc9956 RP	80
	81	if (!led_cdev->trigger)
	82	len += sprintf(buf+len, "[none] ");
	83	else
	84	len += sprintf(buf+len, "none ");
	85
	86	list_for_each_entry(trig, &trigger_list, next_trig) {
	87	if (led_cdev->trigger && !strcmp(led_cdev->trigger->name,
	88	trig->name))
	89	len += sprintf(buf+len, "[%s] ", trig->name);
	90	else
	91	len += sprintf(buf+len, "%s ", trig->name);
	92	}
dc47206e RP	93	up_read(&led_cdev->trigger_lock);
dc47206e RP	94	up_read(&triggers_list_lock);
c3bc9956 RP	95
	96	len += sprintf(len+buf, "\n");
	97	return len;
	98	}
4d404fd5	99	EXPORT_SYMBOL_GPL(led_trigger_show);
c3bc9956 RP	100
c3bc9956 RP	101	/* Caller must ensure led_cdev->trigger_lock held */
eb202621	102	void led_trigger_set(struct led_classdev led_cdev, struct led_trigger trig)
c3bc9956 RP	103	{
c3bc9956 RP	104	unsigned long flags;
52c47742 CC	105	char *event = NULL;
	106	char *envp[2];
	107	const char *name;
	108
	109	name = trig ? trig->name : "none";
	110	event = kasprintf(GFP_KERNEL, "TRIGGER=%s", name);
c3bc9956 RP	111
	112	/* Remove any existing trigger */
	113	if (led_cdev->trigger) {
	114	write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
	115	list_del(&led_cdev->trig_list);
4d404fd5 NM	116	write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock,
4d404fd5 NM	117	flags);
d23a22a7 FB	118	cancel_work_sync(&led_cdev->set_brightness_work);
d23a22a7 FB	119	led_stop_software_blink(led_cdev);
c3bc9956 RP	120	if (led_cdev->trigger->deactivate)
c3bc9956 RP	121	led_cdev->trigger->deactivate(led_cdev);
fe3025b5	122	led_cdev->trigger = NULL;
19cd67e2	123	led_set_brightness(led_cdev, LED_OFF);
c3bc9956	124	}
eb202621 BW	125	if (trig) {
	126	write_lock_irqsave(&trig->leddev_list_lock, flags);
	127	list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
	128	write_unlock_irqrestore(&trig->leddev_list_lock, flags);
	129	led_cdev->trigger = trig;
	130	if (trig->activate)
	131	trig->activate(led_cdev);
c3bc9956	132	}
52c47742 CC	133
	134	if (event) {
	135	envp[0] = event;
	136	envp[1] = NULL;
	137	kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp);
	138	kfree(event);
	139	}
c3bc9956	140	}
4d404fd5	141	EXPORT_SYMBOL_GPL(led_trigger_set);
c3bc9956	142
0013b23d NM	143	void led_trigger_remove(struct led_classdev *led_cdev)
	144	{
	145	down_write(&led_cdev->trigger_lock);
	146	led_trigger_set(led_cdev, NULL);
	147	up_write(&led_cdev->trigger_lock);
	148	}
4d404fd5	149	EXPORT_SYMBOL_GPL(led_trigger_remove);
0013b23d	150
c3bc9956 RP	151	void led_trigger_set_default(struct led_classdev *led_cdev)
	152	{
	153	struct led_trigger *trig;
	154
	155	if (!led_cdev->default_trigger)
	156	return;
	157
dc47206e RP	158	down_read(&triggers_list_lock);
dc47206e RP	159	down_write(&led_cdev->trigger_lock);
c3bc9956 RP	160	list_for_each_entry(trig, &trigger_list, next_trig) {
	161	if (!strcmp(led_cdev->default_trigger, trig->name))
	162	led_trigger_set(led_cdev, trig);
	163	}
dc47206e RP	164	up_write(&led_cdev->trigger_lock);
dc47206e RP	165	up_read(&triggers_list_lock);
c3bc9956	166	}
4d404fd5 NM	167	EXPORT_SYMBOL_GPL(led_trigger_set_default);
4d404fd5 NM	168
a8df7b1a FB	169	void led_trigger_rename_static(const char name, struct led_trigger trig)
	170	{
	171	/* new name must be on a temporary string to prevent races */
	172	BUG_ON(name == trig->name);
	173
	174	down_write(&triggers_list_lock);
	175	/* this assumes that trig->name was originaly allocated to
	176	* non constant storage */
	177	strcpy((char *)trig->name, name);
	178	up_write(&triggers_list_lock);
	179	}
	180	EXPORT_SYMBOL_GPL(led_trigger_rename_static);
	181
4d404fd5	182	/* LED Trigger Interface */
c3bc9956	183
eb202621	184	int led_trigger_register(struct led_trigger *trig)
c3bc9956 RP	185	{
c3bc9956 RP	186	struct led_classdev *led_cdev;
eb202621	187	struct led_trigger *_trig;
c3bc9956	188
eb202621 BW	189	rwlock_init(&trig->leddev_list_lock);
eb202621 BW	190	INIT_LIST_HEAD(&trig->led_cdevs);
c3bc9956	191
dc47206e	192	down_write(&triggers_list_lock);
700c6ea2	193	/* Make sure the trigger's name isn't already in use */
eb202621 BW	194	list_for_each_entry(_trig, &trigger_list, next_trig) {
eb202621 BW	195	if (!strcmp(_trig->name, trig->name)) {
700c6ea2 AN	196	up_write(&triggers_list_lock);
	197	return -EEXIST;
	198	}
	199	}
	200	/* Add to the list of led triggers */
eb202621	201	list_add_tail(&trig->next_trig, &trigger_list);
dc47206e	202	up_write(&triggers_list_lock);
c3bc9956 RP	203
c3bc9956 RP	204	/* Register with any LEDs that have this as a default trigger */
72f8da32	205	down_read(&leds_list_lock);
c3bc9956	206	list_for_each_entry(led_cdev, &leds_list, node) {
dc47206e	207	down_write(&led_cdev->trigger_lock);
c3bc9956	208	if (!led_cdev->trigger && led_cdev->default_trigger &&
eb202621 BW	209	!strcmp(led_cdev->default_trigger, trig->name))
eb202621 BW	210	led_trigger_set(led_cdev, trig);
dc47206e	211	up_write(&led_cdev->trigger_lock);
c3bc9956	212	}
72f8da32	213	up_read(&leds_list_lock);
c3bc9956 RP	214
	215	return 0;
	216	}
4d404fd5	217	EXPORT_SYMBOL_GPL(led_trigger_register);
c3bc9956	218
eb202621	219	void led_trigger_unregister(struct led_trigger *trig)
c3bc9956 RP	220	{
	221	struct led_classdev *led_cdev;
	222
14f5716b SL	223	if (list_empty_careful(&trig->next_trig))
	224	return;
	225
c3bc9956	226	/* Remove from the list of led triggers */
dc47206e	227	down_write(&triggers_list_lock);
14f5716b	228	list_del_init(&trig->next_trig);
dc47206e	229	up_write(&triggers_list_lock);
c3bc9956 RP	230
c3bc9956 RP	231	/* Remove anyone actively using this trigger */
72f8da32	232	down_read(&leds_list_lock);
c3bc9956	233	list_for_each_entry(led_cdev, &leds_list, node) {
dc47206e	234	down_write(&led_cdev->trigger_lock);
eb202621	235	if (led_cdev->trigger == trig)
c3bc9956	236	led_trigger_set(led_cdev, NULL);
dc47206e	237	up_write(&led_cdev->trigger_lock);
c3bc9956	238	}
72f8da32	239	up_read(&leds_list_lock);
c3bc9956	240	}
4d404fd5	241	EXPORT_SYMBOL_GPL(led_trigger_unregister);
c3bc9956	242
9534cc31 HK	243	static void devm_led_trigger_release(struct device dev, void res)
	244	{
	245	led_trigger_unregister((struct led_trigger *)res);
	246	}
	247
	248	int devm_led_trigger_register(struct device *dev,
	249	struct led_trigger *trig)
	250	{
	251	struct led_trigger **dr;
	252	int rc;
	253
	254	dr = devres_alloc(devm_led_trigger_release, sizeof(*dr),
	255	GFP_KERNEL);
	256	if (!dr)
	257	return -ENOMEM;
	258
	259	*dr = trig;
	260
	261	rc = led_trigger_register(trig);
	262	if (rc)
	263	devres_free(dr);
	264	else
	265	devres_add(dev, dr);
	266
	267	return rc;
	268	}
	269	EXPORT_SYMBOL_GPL(devm_led_trigger_register);
	270
4d404fd5 NM	271	/* Simple LED Tigger Interface */
4d404fd5 NM	272
eb202621	273	void led_trigger_event(struct led_trigger *trig,
4d404fd5	274	enum led_brightness brightness)
c3bc9956	275	{
11e043b5	276	struct led_classdev *led_cdev;
4d404fd5	277
eb202621	278	if (!trig)
4d404fd5 NM	279	return;
4d404fd5 NM	280
eb202621	281	read_lock(&trig->leddev_list_lock);
11e043b5	282	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list)
d23a22a7	283	led_set_brightness(led_cdev, brightness);
eb202621	284	read_unlock(&trig->leddev_list_lock);
c3bc9956	285	}
4d404fd5	286	EXPORT_SYMBOL_GPL(led_trigger_event);
c3bc9956	287
20c0e6b8	288	static void led_trigger_blink_setup(struct led_trigger *trig,
5bb629c5 FB	289	unsigned long *delay_on,
	290	unsigned long *delay_off,
	291	int oneshot,
	292	int invert)
0b9536c9	293	{
11e043b5	294	struct led_classdev *led_cdev;
0b9536c9	295
eb202621	296	if (!trig)
0b9536c9 VK	297	return;
0b9536c9 VK	298
eb202621	299	read_lock(&trig->leddev_list_lock);
11e043b5	300	list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list) {
5bb629c5 FB	301	if (oneshot)
	302	led_blink_set_oneshot(led_cdev, delay_on, delay_off,
	303	invert);
	304	else
	305	led_blink_set(led_cdev, delay_on, delay_off);
0b9536c9	306	}
eb202621	307	read_unlock(&trig->leddev_list_lock);
0b9536c9	308	}
5bb629c5 FB	309
	310	void led_trigger_blink(struct led_trigger *trig,
	311	unsigned long *delay_on,
	312	unsigned long *delay_off)
	313	{
	314	led_trigger_blink_setup(trig, delay_on, delay_off, 0, 0);
	315	}
0b9536c9 VK	316	EXPORT_SYMBOL_GPL(led_trigger_blink);
0b9536c9 VK	317
5bb629c5 FB	318	void led_trigger_blink_oneshot(struct led_trigger *trig,
	319	unsigned long *delay_on,
	320	unsigned long *delay_off,
	321	int invert)
	322	{
	323	led_trigger_blink_setup(trig, delay_on, delay_off, 1, invert);
	324	}
	325	EXPORT_SYMBOL_GPL(led_trigger_blink_oneshot);
	326
4d404fd5 NM	327	void led_trigger_register_simple(const char name, struct led_trigger *tp)
4d404fd5 NM	328	{
eb202621	329	struct led_trigger *trig;
4d404fd5	330	int err;
c3bc9956	331
eb202621	332	trig = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
c3bc9956	333
eb202621 BW	334	if (trig) {
	335	trig->name = name;
	336	err = led_trigger_register(trig);
cba4c2ac	337	if (err < 0) {
eb202621 BW	338	kfree(trig);
eb202621 BW	339	trig = NULL;
09f5fe75 SK	340	pr_warn("LED trigger %s failed to register (%d)\n",
09f5fe75 SK	341	name, err);
cba4c2ac	342	}
09f5fe75 SK	343	} else {
	344	pr_warn("LED trigger %s failed to register (no memory)\n",
	345	name);
	346	}
eb202621	347	*tp = trig;
4d404fd5	348	}
c3bc9956	349	EXPORT_SYMBOL_GPL(led_trigger_register_simple);
4d404fd5	350
eb202621	351	void led_trigger_unregister_simple(struct led_trigger *trig)
4d404fd5	352	{
eb202621 BW	353	if (trig)
	354	led_trigger_unregister(trig);
	355	kfree(trig);
4d404fd5	356	}
c3bc9956	357	EXPORT_SYMBOL_GPL(led_trigger_unregister_simple);
c3bc9956 RP	358
	359	MODULE_AUTHOR("Richard Purdie");
	360	MODULE_LICENSE("GPL");
	361	MODULE_DESCRIPTION("LED Triggers Core");