[net-next-2.6.git] / drivers / power / power_supply_leds.c

/*
 *  LEDs triggers for power supply class
 *
 *  Copyright © 2007  Anton Vorontsov <cbou@mail.ru>
 *  Copyright © 2004  Szabolcs Gyurko
 *  Copyright © 2003  Ian Molton <spyro@f2s.com>
 *
 *  Modified: 2004, Oct     Szabolcs Gyurko
 *
 *  You may use this code as per GPL version 2
 */

#include <linux/kernel.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;

	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);
		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);
		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);
		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;

	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);

	goto success;

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);
	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 <cbou@mail.ru>
	5	* Copyright © 2004 Szabolcs Gyurko
	6	* Copyright © 2003 Ian Molton <spyro@f2s.com>
	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>
4a11b59d	14	#include <linux/power_supply.h>
5a0e3ad6	15	#include <linux/slab.h>
4a11b59d	16
25f12141 AB	17	#include "power_supply.h"
25f12141 AB	18
4a11b59d AV	19	/* Battery specific LEDs triggers. */
	20
	21	static void power_supply_update_bat_leds(struct power_supply *psy)
	22	{
	23	union power_supply_propval status;
	24
	25	if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
	26	return;
	27
0cddc0a9	28	dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);
4a11b59d AV	29
	30	switch (status.intval) {
	31	case POWER_SUPPLY_STATUS_FULL:
	32	led_trigger_event(psy->charging_full_trig, LED_FULL);
	33	led_trigger_event(psy->charging_trig, LED_OFF);
	34	led_trigger_event(psy->full_trig, LED_FULL);
	35	break;
	36	case POWER_SUPPLY_STATUS_CHARGING:
	37	led_trigger_event(psy->charging_full_trig, LED_FULL);
	38	led_trigger_event(psy->charging_trig, LED_FULL);
	39	led_trigger_event(psy->full_trig, LED_OFF);
	40	break;
	41	default:
	42	led_trigger_event(psy->charging_full_trig, LED_OFF);
	43	led_trigger_event(psy->charging_trig, LED_OFF);
	44	led_trigger_event(psy->full_trig, LED_OFF);
	45	break;
	46	}
4a11b59d AV	47	}
	48
	49	static int power_supply_create_bat_triggers(struct power_supply *psy)
	50	{
	51	int rc = 0;
	52
4d24473c AM	53	psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
4d24473c AM	54	"%s-charging-or-full", psy->name);
4a11b59d AV	55	if (!psy->charging_full_trig_name)
	56	goto charging_full_failed;
	57
4d24473c AM	58	psy->charging_trig_name = kasprintf(GFP_KERNEL,
4d24473c AM	59	"%s-charging", psy->name);
4a11b59d AV	60	if (!psy->charging_trig_name)
	61	goto charging_failed;
	62
4d24473c	63	psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
4a11b59d AV	64	if (!psy->full_trig_name)
	65	goto full_failed;
	66
4a11b59d AV	67	led_trigger_register_simple(psy->charging_full_trig_name,
	68	&psy->charging_full_trig);
	69	led_trigger_register_simple(psy->charging_trig_name,
	70	&psy->charging_trig);
	71	led_trigger_register_simple(psy->full_trig_name,
	72	&psy->full_trig);
	73
	74	goto success;
	75
	76	full_failed:
	77	kfree(psy->charging_trig_name);
	78	charging_failed:
	79	kfree(psy->charging_full_trig_name);
	80	charging_full_failed:
	81	rc = -ENOMEM;
	82	success:
	83	return rc;
	84	}
	85
	86	static void power_supply_remove_bat_triggers(struct power_supply *psy)
	87	{
	88	led_trigger_unregister_simple(psy->charging_full_trig);
	89	led_trigger_unregister_simple(psy->charging_trig);
	90	led_trigger_unregister_simple(psy->full_trig);
	91	kfree(psy->full_trig_name);
	92	kfree(psy->charging_trig_name);
	93	kfree(psy->charging_full_trig_name);
4a11b59d AV	94	}
	95
	96	/* Generated power specific LEDs triggers. */
	97
	98	static void power_supply_update_gen_leds(struct power_supply *psy)
	99	{
	100	union power_supply_propval online;
	101
	102	if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
	103	return;
	104
0cddc0a9	105	dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
4a11b59d AV	106
	107	if (online.intval)
	108	led_trigger_event(psy->online_trig, LED_FULL);
	109	else
	110	led_trigger_event(psy->online_trig, LED_OFF);
4a11b59d AV	111	}
	112
	113	static int power_supply_create_gen_triggers(struct power_supply *psy)
	114	{
	115	int rc = 0;
	116
4d24473c	117	psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
4a11b59d AV	118	if (!psy->online_trig_name)
	119	goto online_failed;
	120
4a11b59d AV	121	led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
	122
	123	goto success;
	124
	125	online_failed:
	126	rc = -ENOMEM;
	127	success:
	128	return rc;
	129	}
	130
	131	static void power_supply_remove_gen_triggers(struct power_supply *psy)
	132	{
	133	led_trigger_unregister_simple(psy->online_trig);
	134	kfree(psy->online_trig_name);
4a11b59d AV	135	}
	136
	137	/* Choice what triggers to create&update. */
	138
	139	void power_supply_update_leds(struct power_supply *psy)
	140	{
	141	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
	142	power_supply_update_bat_leds(psy);
	143	else
	144	power_supply_update_gen_leds(psy);
4a11b59d AV	145	}
	146
	147	int power_supply_create_triggers(struct power_supply *psy)
	148	{
	149	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
	150	return power_supply_create_bat_triggers(psy);
	151	return power_supply_create_gen_triggers(psy);
	152	}
	153
	154	void power_supply_remove_triggers(struct power_supply *psy)
	155	{
	156	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
	157	power_supply_remove_bat_triggers(psy);
	158	else
	159	power_supply_remove_gen_triggers(psy);
4a11b59d	160	}