[linux.git] / drivers / power / power_supply_leds.c

/*
 *  LEDs triggers for power supply class
 *
 *  Copyright © 2007  Anton Vorontsov <[email protected]>
 *  Copyright © 2004  Szabolcs Gyurko
 *  Copyright © 2003  Ian Molton <[email protected]>
 *
 *  Modified: 2004, Oct     Szabolcs Gyurko
 *
 *  You may use this code as per GPL version 2
 */

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>

#include "power_supply.h"

/* Battery specific LEDs triggers. */

static void power_supply_update_bat_leds(struct power_supply *psy)
{
	union power_supply_propval status;
	unsigned long delay_on = 0;
	unsigned long delay_off = 0;

	if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
		return;

	dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);

	switch (status.intval) {
	case POWER_SUPPLY_STATUS_FULL:
		led_trigger_event(psy->charging_full_trig, LED_FULL);
		led_trigger_event(psy->charging_trig, LED_OFF);
		led_trigger_event(psy->full_trig, LED_FULL);
		led_trigger_event(psy->charging_blink_full_solid_trig,
			LED_FULL);
		break;
	case POWER_SUPPLY_STATUS_CHARGING:
		led_trigger_event(psy->charging_full_trig, LED_FULL);
		led_trigger_event(psy->charging_trig, LED_FULL);
		led_trigger_event(psy->full_trig, LED_OFF);
		led_trigger_blink(psy->charging_blink_full_solid_trig,
			&delay_on, &delay_off);
		break;
	default:
		led_trigger_event(psy->charging_full_trig, LED_OFF);
		led_trigger_event(psy->charging_trig, LED_OFF);
		led_trigger_event(psy->full_trig, LED_OFF);
		led_trigger_event(psy->charging_blink_full_solid_trig,
			LED_OFF);
		break;
	}
}

static int power_supply_create_bat_triggers(struct power_supply *psy)
{
	int rc = 0;

	psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
					"%s-charging-or-full", psy->name);
	if (!psy->charging_full_trig_name)
		goto charging_full_failed;

	psy->charging_trig_name = kasprintf(GFP_KERNEL,
					"%s-charging", psy->name);
	if (!psy->charging_trig_name)
		goto charging_failed;

	psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
	if (!psy->full_trig_name)
		goto full_failed;

	psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
		"%s-charging-blink-full-solid", psy->name);
	if (!psy->charging_blink_full_solid_trig_name)
		goto charging_blink_full_solid_failed;

	led_trigger_register_simple(psy->charging_full_trig_name,
				    &psy->charging_full_trig);
	led_trigger_register_simple(psy->charging_trig_name,
				    &psy->charging_trig);
	led_trigger_register_simple(psy->full_trig_name,
				    &psy->full_trig);
	led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
				    &psy->charging_blink_full_solid_trig);

	goto success;

charging_blink_full_solid_failed:
	kfree(psy->full_trig_name);
full_failed:
	kfree(psy->charging_trig_name);
charging_failed:
	kfree(psy->charging_full_trig_name);
charging_full_failed:
	rc = -ENOMEM;
success:
	return rc;
}

static void power_supply_remove_bat_triggers(struct power_supply *psy)
{
	led_trigger_unregister_simple(psy->charging_full_trig);
	led_trigger_unregister_simple(psy->charging_trig);
	led_trigger_unregister_simple(psy->full_trig);
	led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
	kfree(psy->charging_blink_full_solid_trig_name);
	kfree(psy->full_trig_name);
	kfree(psy->charging_trig_name);
	kfree(psy->charging_full_trig_name);
}

/* Generated power specific LEDs triggers. */

static void power_supply_update_gen_leds(struct power_supply *psy)
{
	union power_supply_propval online;

	if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
		return;

	dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);

	if (online.intval)
		led_trigger_event(psy->online_trig, LED_FULL);
	else
		led_trigger_event(psy->online_trig, LED_OFF);
}

static int power_supply_create_gen_triggers(struct power_supply *psy)
{
	int rc = 0;

	psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
	if (!psy->online_trig_name)
		goto online_failed;

	led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);

	goto success;

online_failed:
	rc = -ENOMEM;
success:
	return rc;
}

static void power_supply_remove_gen_triggers(struct power_supply *psy)
{
	led_trigger_unregister_simple(psy->online_trig);
	kfree(psy->online_trig_name);
}

/* Choice what triggers to create&update. */

void power_supply_update_leds(struct power_supply *psy)
{
	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
		power_supply_update_bat_leds(psy);
	else
		power_supply_update_gen_leds(psy);
}

int power_supply_create_triggers(struct power_supply *psy)
{
	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
		return power_supply_create_bat_triggers(psy);
	return power_supply_create_gen_triggers(psy);
}

void power_supply_remove_triggers(struct power_supply *psy)
{
	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
		power_supply_remove_bat_triggers(psy);
	else
		power_supply_remove_gen_triggers(psy);
}
Commit	Line	Data
4a11b59d AV	1	/*
	2	* LEDs triggers for power supply class
	3	*
	4	* Copyright © 2007 Anton Vorontsov <[email protected]>
	5	* Copyright © 2004 Szabolcs Gyurko
	6	* Copyright © 2003 Ian Molton <[email protected]>
	7	*
	8	* Modified: 2004, Oct Szabolcs Gyurko
	9	*
	10	* You may use this code as per GPL version 2
	11	*/
	12
4d24473c	13	#include <linux/kernel.h>
51990e82	14	#include <linux/device.h>
4a11b59d	15	#include <linux/power_supply.h>
5a0e3ad6	16	#include <linux/slab.h>
4a11b59d	17
25f12141 AB	18	#include "power_supply.h"
25f12141 AB	19
4a11b59d AV	20	/* Battery specific LEDs triggers. */
	21
	22	static void power_supply_update_bat_leds(struct power_supply *psy)
	23	{
	24	union power_supply_propval status;
6501f728 VK	25	unsigned long delay_on = 0;
6501f728 VK	26	unsigned long delay_off = 0;
4a11b59d AV	27
	28	if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
	29	return;
	30
0cddc0a9	31	dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);
4a11b59d AV	32
	33	switch (status.intval) {
	34	case POWER_SUPPLY_STATUS_FULL:
	35	led_trigger_event(psy->charging_full_trig, LED_FULL);
	36	led_trigger_event(psy->charging_trig, LED_OFF);
	37	led_trigger_event(psy->full_trig, LED_FULL);
6501f728 VK	38	led_trigger_event(psy->charging_blink_full_solid_trig,
6501f728 VK	39	LED_FULL);
4a11b59d AV	40	break;
	41	case POWER_SUPPLY_STATUS_CHARGING:
	42	led_trigger_event(psy->charging_full_trig, LED_FULL);
	43	led_trigger_event(psy->charging_trig, LED_FULL);
	44	led_trigger_event(psy->full_trig, LED_OFF);
6501f728 VK	45	led_trigger_blink(psy->charging_blink_full_solid_trig,
6501f728 VK	46	&delay_on, &delay_off);
4a11b59d AV	47	break;
	48	default:
	49	led_trigger_event(psy->charging_full_trig, LED_OFF);
	50	led_trigger_event(psy->charging_trig, LED_OFF);
	51	led_trigger_event(psy->full_trig, LED_OFF);
6501f728 VK	52	led_trigger_event(psy->charging_blink_full_solid_trig,
6501f728 VK	53	LED_OFF);
4a11b59d AV	54	break;
4a11b59d AV	55	}
4a11b59d AV	56	}
	57
	58	static int power_supply_create_bat_triggers(struct power_supply *psy)
	59	{
	60	int rc = 0;
	61
4d24473c AM	62	psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
4d24473c AM	63	"%s-charging-or-full", psy->name);
4a11b59d AV	64	if (!psy->charging_full_trig_name)
	65	goto charging_full_failed;
	66
4d24473c AM	67	psy->charging_trig_name = kasprintf(GFP_KERNEL,
4d24473c AM	68	"%s-charging", psy->name);
4a11b59d AV	69	if (!psy->charging_trig_name)
	70	goto charging_failed;
	71
4d24473c	72	psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
4a11b59d AV	73	if (!psy->full_trig_name)
	74	goto full_failed;
	75
6501f728 VK	76	psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
	77	"%s-charging-blink-full-solid", psy->name);
	78	if (!psy->charging_blink_full_solid_trig_name)
	79	goto charging_blink_full_solid_failed;
	80
4a11b59d AV	81	led_trigger_register_simple(psy->charging_full_trig_name,
	82	&psy->charging_full_trig);
	83	led_trigger_register_simple(psy->charging_trig_name,
	84	&psy->charging_trig);
	85	led_trigger_register_simple(psy->full_trig_name,
	86	&psy->full_trig);
6501f728 VK	87	led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
6501f728 VK	88	&psy->charging_blink_full_solid_trig);
4a11b59d AV	89
	90	goto success;
	91
6501f728 VK	92	charging_blink_full_solid_failed:
6501f728 VK	93	kfree(psy->full_trig_name);
4a11b59d AV	94	full_failed:
	95	kfree(psy->charging_trig_name);
	96	charging_failed:
	97	kfree(psy->charging_full_trig_name);
	98	charging_full_failed:
	99	rc = -ENOMEM;
	100	success:
	101	return rc;
	102	}
	103
	104	static void power_supply_remove_bat_triggers(struct power_supply *psy)
	105	{
	106	led_trigger_unregister_simple(psy->charging_full_trig);
	107	led_trigger_unregister_simple(psy->charging_trig);
	108	led_trigger_unregister_simple(psy->full_trig);
6501f728 VK	109	led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
6501f728 VK	110	kfree(psy->charging_blink_full_solid_trig_name);
4a11b59d AV	111	kfree(psy->full_trig_name);
	112	kfree(psy->charging_trig_name);
	113	kfree(psy->charging_full_trig_name);
4a11b59d AV	114	}
	115
	116	/* Generated power specific LEDs triggers. */
	117
	118	static void power_supply_update_gen_leds(struct power_supply *psy)
	119	{
	120	union power_supply_propval online;
	121
	122	if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
	123	return;
	124
0cddc0a9	125	dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
4a11b59d AV	126
	127	if (online.intval)
	128	led_trigger_event(psy->online_trig, LED_FULL);
	129	else
	130	led_trigger_event(psy->online_trig, LED_OFF);
4a11b59d AV	131	}
	132
	133	static int power_supply_create_gen_triggers(struct power_supply *psy)
	134	{
	135	int rc = 0;
	136
4d24473c	137	psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
4a11b59d AV	138	if (!psy->online_trig_name)
	139	goto online_failed;
	140
4a11b59d AV	141	led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
	142
	143	goto success;
	144
	145	online_failed:
	146	rc = -ENOMEM;
	147	success:
	148	return rc;
	149	}
	150
	151	static void power_supply_remove_gen_triggers(struct power_supply *psy)
	152	{
	153	led_trigger_unregister_simple(psy->online_trig);
	154	kfree(psy->online_trig_name);
4a11b59d AV	155	}
	156
	157	/* Choice what triggers to create&update. */
	158
	159	void power_supply_update_leds(struct power_supply *psy)
	160	{
	161	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
	162	power_supply_update_bat_leds(psy);
	163	else
	164	power_supply_update_gen_leds(psy);
4a11b59d AV	165	}
	166
	167	int power_supply_create_triggers(struct power_supply *psy)
	168	{
	169	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
	170	return power_supply_create_bat_triggers(psy);
	171	return power_supply_create_gen_triggers(psy);
	172	}
	173
	174	void power_supply_remove_triggers(struct power_supply *psy)
	175	{
	176	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
	177	power_supply_remove_bat_triggers(psy);
	178	else
	179	power_supply_remove_gen_triggers(psy);
4a11b59d	180	}