[deliverable/linux.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);
	char trigger_name[TRIG_NAME_MAX];
	struct led_trigger *trig;
	size_t len;
	int ret = count;

	mutex_lock(&led_cdev->led_access);

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

	trigger_name[sizeof(trigger_name) - 1] = '\0';
	strncpy(trigger_name, buf, sizeof(trigger_name) - 1);
	len = strlen(trigger_name);

	if (len && trigger_name[len - 1] == '\n')
		trigger_name[len - 1] = '\0';

	if (!strcmp(trigger_name, "none")) {
		led_trigger_remove(led_cdev);
		goto unlock;
	}

	down_read(&triggers_list_lock);
	list_for_each_entry(trig, &trigger_list, next_trig) {
		if (!strcmp(trigger_name, 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);

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