[linux-2.6-block.git] / drivers / power / collie_battery.c

/*
 * Battery and Power Management code for the Sharp SL-5x00
 *
 * Copyright (C) 2009 Thomas Kunze
 *
 * based on tosa_battery.c
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/mfd/ucb1x00.h>

#include <asm/mach/sharpsl_param.h>
#include <asm/mach-types.h>
#include <mach/collie.h>

static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
static struct work_struct bat_work;
static struct ucb1x00 *ucb;
static int wakeup_enabled;

struct collie_bat {
	int status;
	struct power_supply *psy;
	int full_chrg;

	struct mutex work_lock; /* protects data */

	bool (*is_present)(struct collie_bat *bat);
	int gpio_full;
	int gpio_charge_on;

	int technology;

	int gpio_bat;
	int adc_bat;
	int adc_bat_divider;
	int bat_max;
	int bat_min;

	int gpio_temp;
	int adc_temp;
	int adc_temp_divider;
};

static struct collie_bat collie_bat_main;

static unsigned long collie_read_bat(struct collie_bat *bat)
{
	unsigned long value = 0;

	if (bat->gpio_bat < 0 || bat->adc_bat < 0)
		return 0;
	mutex_lock(&bat_lock);
	gpio_set_value(bat->gpio_bat, 1);
	msleep(5);
	ucb1x00_adc_enable(ucb);
	value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC);
	ucb1x00_adc_disable(ucb);
	gpio_set_value(bat->gpio_bat, 0);
	mutex_unlock(&bat_lock);
	value = value * 1000000 / bat->adc_bat_divider;

	return value;
}

static unsigned long collie_read_temp(struct collie_bat *bat)
{
	unsigned long value = 0;
	if (bat->gpio_temp < 0 || bat->adc_temp < 0)
		return 0;

	mutex_lock(&bat_lock);
	gpio_set_value(bat->gpio_temp, 1);
	msleep(5);
	ucb1x00_adc_enable(ucb);
	value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC);
	ucb1x00_adc_disable(ucb);
	gpio_set_value(bat->gpio_temp, 0);
	mutex_unlock(&bat_lock);

	value = value * 10000 / bat->adc_temp_divider;

	return value;
}

static int collie_bat_get_property(struct power_supply *psy,
			    enum power_supply_property psp,
			    union power_supply_propval *val)
{
	int ret = 0;
	struct collie_bat *bat = power_supply_get_drvdata(psy);

	if (bat->is_present && !bat->is_present(bat)
			&& psp != POWER_SUPPLY_PROP_PRESENT) {
		return -ENODEV;
	}

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = bat->status;
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = bat->technology;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = collie_read_bat(bat);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
		if (bat->full_chrg == -1)
			val->intval = bat->bat_max;
		else
			val->intval = bat->full_chrg;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
		val->intval = bat->bat_max;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
		val->intval = bat->bat_min;
		break;
	case POWER_SUPPLY_PROP_TEMP:
		val->intval = collie_read_temp(bat);
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = bat->is_present ? bat->is_present(bat) : 1;
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

static void collie_bat_external_power_changed(struct power_supply *psy)
{
	schedule_work(&bat_work);
}

static irqreturn_t collie_bat_gpio_isr(int irq, void *data)
{
	pr_info("collie_bat_gpio irq\n");
	schedule_work(&bat_work);
	return IRQ_HANDLED;
}

static void collie_bat_update(struct collie_bat *bat)
{
	int old;
	struct power_supply *psy = bat->psy;

	mutex_lock(&bat->work_lock);

	old = bat->status;

	if (bat->is_present && !bat->is_present(bat)) {
		printk(KERN_NOTICE "%s not present\n", psy->desc->name);
		bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
		bat->full_chrg = -1;
	} else if (power_supply_am_i_supplied(psy)) {
		if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
			gpio_set_value(bat->gpio_charge_on, 1);
			mdelay(15);
		}

		if (gpio_get_value(bat->gpio_full)) {
			if (old == POWER_SUPPLY_STATUS_CHARGING ||
					bat->full_chrg == -1)
				bat->full_chrg = collie_read_bat(bat);

			gpio_set_value(bat->gpio_charge_on, 0);
			bat->status = POWER_SUPPLY_STATUS_FULL;
		} else {
			gpio_set_value(bat->gpio_charge_on, 1);
			bat->status = POWER_SUPPLY_STATUS_CHARGING;
		}
	} else {
		gpio_set_value(bat->gpio_charge_on, 0);
		bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	}

	if (old != bat->status)
		power_supply_changed(psy);

	mutex_unlock(&bat->work_lock);
}

static void collie_bat_work(struct work_struct *work)
{
	collie_bat_update(&collie_bat_main);
}


static enum power_supply_property collie_bat_main_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_TEMP,
};

static enum power_supply_property collie_bat_bu_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	POWER_SUPPLY_PROP_PRESENT,
};

static const struct power_supply_desc collie_bat_main_desc = {
	.name		= "main-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= collie_bat_main_props,
	.num_properties	= ARRAY_SIZE(collie_bat_main_props),
	.get_property	= collie_bat_get_property,
	.external_power_changed = collie_bat_external_power_changed,
	.use_for_apm	= 1,
};

static struct collie_bat collie_bat_main = {
	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	.full_chrg = -1,
	.psy = NULL,

	.gpio_full = COLLIE_GPIO_CO,
	.gpio_charge_on = COLLIE_GPIO_CHARGE_ON,

	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,

	.gpio_bat = COLLIE_GPIO_MBAT_ON,
	.adc_bat = UCB_ADC_INP_AD1,
	.adc_bat_divider = 155,
	.bat_max = 4310000,
	.bat_min = 1551 * 1000000 / 414,

	.gpio_temp = COLLIE_GPIO_TMP_ON,
	.adc_temp = UCB_ADC_INP_AD0,
	.adc_temp_divider = 10000,
};

static const struct power_supply_desc collie_bat_bu_desc = {
	.name		= "backup-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.properties	= collie_bat_bu_props,
	.num_properties	= ARRAY_SIZE(collie_bat_bu_props),
	.get_property	= collie_bat_get_property,
	.external_power_changed = collie_bat_external_power_changed,
};

static struct collie_bat collie_bat_bu = {
	.status = POWER_SUPPLY_STATUS_UNKNOWN,
	.full_chrg = -1,
	.psy = NULL,

	.gpio_full = -1,
	.gpio_charge_on = -1,

	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,

	.gpio_bat = COLLIE_GPIO_BBAT_ON,
	.adc_bat = UCB_ADC_INP_AD1,
	.adc_bat_divider = 155,
	.bat_max = 3000000,
	.bat_min = 1900000,

	.gpio_temp = -1,
	.adc_temp = -1,
	.adc_temp_divider = -1,
};

static struct gpio collie_batt_gpios[] = {
	{ COLLIE_GPIO_CO,	    GPIOF_IN,		"main battery full" },
	{ COLLIE_GPIO_MAIN_BAT_LOW, GPIOF_IN,		"main battery low" },
	{ COLLIE_GPIO_CHARGE_ON,    GPIOF_OUT_INIT_LOW,	"main charge on" },
	{ COLLIE_GPIO_MBAT_ON,	    GPIOF_OUT_INIT_LOW,	"main battery" },
	{ COLLIE_GPIO_TMP_ON,	    GPIOF_OUT_INIT_LOW,	"main battery temp" },
	{ COLLIE_GPIO_BBAT_ON,	    GPIOF_OUT_INIT_LOW,	"backup battery" },
};

#ifdef CONFIG_PM
static int collie_bat_suspend(struct ucb1x00_dev *dev)
{
	/* flush all pending status updates */
	flush_work(&bat_work);

	if (device_may_wakeup(&dev->ucb->dev) &&
	    collie_bat_main.status == POWER_SUPPLY_STATUS_CHARGING)
		wakeup_enabled = !enable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO));
	else
		wakeup_enabled = 0;

	return 0;
}

static int collie_bat_resume(struct ucb1x00_dev *dev)
{
	if (wakeup_enabled)
		disable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO));

	/* things may have changed while we were away */
	schedule_work(&bat_work);
	return 0;
}
#else
#define collie_bat_suspend NULL
#define collie_bat_resume NULL
#endif

static int collie_bat_probe(struct ucb1x00_dev *dev)
{
	int ret;
	struct power_supply_config psy_main_cfg = {}, psy_bu_cfg = {};

	if (!machine_is_collie())
		return -ENODEV;

	ucb = dev->ucb;

	ret = gpio_request_array(collie_batt_gpios,
				 ARRAY_SIZE(collie_batt_gpios));
	if (ret)
		return ret;

	mutex_init(&collie_bat_main.work_lock);

	INIT_WORK(&bat_work, collie_bat_work);

	psy_main_cfg.drv_data = &collie_bat_main;
	collie_bat_main.psy = power_supply_register(&dev->ucb->dev,
						    &collie_bat_main_desc,
						    &psy_main_cfg);
	if (IS_ERR(collie_bat_main.psy)) {
		ret = PTR_ERR(collie_bat_main.psy);
		goto err_psy_reg_main;
	}

	psy_bu_cfg.drv_data = &collie_bat_bu;
	collie_bat_bu.psy = power_supply_register(&dev->ucb->dev,
						  &collie_bat_bu_desc,
						  &psy_bu_cfg);
	if (IS_ERR(collie_bat_bu.psy)) {
		ret = PTR_ERR(collie_bat_bu.psy);
		goto err_psy_reg_bu;
	}

	ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO),
				collie_bat_gpio_isr,
				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				"main full", &collie_bat_main);
	if (ret)
		goto err_irq;

	device_init_wakeup(&ucb->dev, 1);
	schedule_work(&bat_work);

	return 0;

err_irq:
	power_supply_unregister(collie_bat_bu.psy);
err_psy_reg_bu:
	power_supply_unregister(collie_bat_main.psy);
err_psy_reg_main:

	/* see comment in collie_bat_remove */
	cancel_work_sync(&bat_work);
	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
	return ret;
}

static void collie_bat_remove(struct ucb1x00_dev *dev)
{
	free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main);

	power_supply_unregister(collie_bat_bu.psy);
	power_supply_unregister(collie_bat_main.psy);

	/*
	 * Now cancel the bat_work.  We won't get any more schedules,
	 * since all sources (isr and external_power_changed) are
	 * unregistered now.
	 */
	cancel_work_sync(&bat_work);
	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
}

static struct ucb1x00_driver collie_bat_driver = {
	.add		= collie_bat_probe,
	.remove		= collie_bat_remove,
	.suspend	= collie_bat_suspend,
	.resume		= collie_bat_resume,
};

static int __init collie_bat_init(void)
{
	return ucb1x00_register_driver(&collie_bat_driver);
}

static void __exit collie_bat_exit(void)
{
	ucb1x00_unregister_driver(&collie_bat_driver);
}

module_init(collie_bat_init);
module_exit(collie_bat_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Thomas Kunze");
MODULE_DESCRIPTION("Collie battery driver");
Commit	Line	Data
f1fce597 TK	1	/*
	2	* Battery and Power Management code for the Sharp SL-5x00
	3	*
	4	* Copyright (C) 2009 Thomas Kunze
	5	*
	6	* based on tosa_battery.c
	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	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/power_supply.h>
	16	#include <linux/delay.h>
	17	#include <linux/spinlock.h>
	18	#include <linux/interrupt.h>
	19	#include <linux/gpio.h>
	20	#include <linux/mfd/ucb1x00.h>
	21
	22	#include <asm/mach/sharpsl_param.h>
	23	#include <asm/mach-types.h>
	24	#include <mach/collie.h>
	25
	26	static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
	27	static struct work_struct bat_work;
	28	static struct ucb1x00 *ucb;
f1300e7f	29	static int wakeup_enabled;
f1fce597 TK	30
	31	struct collie_bat {
	32	int status;
297d716f	33	struct power_supply *psy;
f1fce597 TK	34	int full_chrg;
	35
	36	struct mutex work_lock; /* protects data */
	37
	38	bool (is_present)(struct collie_bat bat);
	39	int gpio_full;
	40	int gpio_charge_on;
	41
	42	int technology;
	43
	44	int gpio_bat;
	45	int adc_bat;
	46	int adc_bat_divider;
	47	int bat_max;
	48	int bat_min;
	49
	50	int gpio_temp;
	51	int adc_temp;
	52	int adc_temp_divider;
	53	};
	54
	55	static struct collie_bat collie_bat_main;
	56
	57	static unsigned long collie_read_bat(struct collie_bat *bat)
	58	{
	59	unsigned long value = 0;
	60
	61	if (bat->gpio_bat < 0 \|\| bat->adc_bat < 0)
	62	return 0;
	63	mutex_lock(&bat_lock);
	64	gpio_set_value(bat->gpio_bat, 1);
	65	msleep(5);
	66	ucb1x00_adc_enable(ucb);
	67	value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC);
	68	ucb1x00_adc_disable(ucb);
	69	gpio_set_value(bat->gpio_bat, 0);
	70	mutex_unlock(&bat_lock);
	71	value = value * 1000000 / bat->adc_bat_divider;
	72
	73	return value;
	74	}
	75
	76	static unsigned long collie_read_temp(struct collie_bat *bat)
	77	{
	78	unsigned long value = 0;
	79	if (bat->gpio_temp < 0 \|\| bat->adc_temp < 0)
	80	return 0;
	81
	82	mutex_lock(&bat_lock);
	83	gpio_set_value(bat->gpio_temp, 1);
	84	msleep(5);
	85	ucb1x00_adc_enable(ucb);
	86	value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC);
	87	ucb1x00_adc_disable(ucb);
	88	gpio_set_value(bat->gpio_temp, 0);
	89	mutex_unlock(&bat_lock);
	90
	91	value = value * 10000 / bat->adc_temp_divider;
	92
	93	return value;
	94	}
	95
	96	static int collie_bat_get_property(struct power_supply *psy,
	97	enum power_supply_property psp,
98	union power_supply_propval *val)
99	{
100	int ret = 0;
297d716f	101	struct collie_bat *bat = power_supply_get_drvdata(psy);
f1fce597 TK	102
	103	if (bat->is_present && !bat->is_present(bat)
	104	&& psp != POWER_SUPPLY_PROP_PRESENT) {
	105	return -ENODEV;
	106	}
	107
	108	switch (psp) {
	109	case POWER_SUPPLY_PROP_STATUS:
	110	val->intval = bat->status;
	111	break;
	112	case POWER_SUPPLY_PROP_TECHNOLOGY:
	113	val->intval = bat->technology;
	114	break;
	115	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	116	val->intval = collie_read_bat(bat);
	117	break;
	118	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
	119	if (bat->full_chrg == -1)
	120	val->intval = bat->bat_max;
	121	else
	122	val->intval = bat->full_chrg;
	123	break;
	124	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
	125	val->intval = bat->bat_max;
	126	break;
	127	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
	128	val->intval = bat->bat_min;
	129	break;
	130	case POWER_SUPPLY_PROP_TEMP:
	131	val->intval = collie_read_temp(bat);
	132	break;
	133	case POWER_SUPPLY_PROP_PRESENT:
	134	val->intval = bat->is_present ? bat->is_present(bat) : 1;
	135	break;
	136	default:
	137	ret = -EINVAL;
	138	break;
	139	}
	140	return ret;
	141	}
	142
	143	static void collie_bat_external_power_changed(struct power_supply *psy)
	144	{
	145	schedule_work(&bat_work);
	146	}
	147
	148	static irqreturn_t collie_bat_gpio_isr(int irq, void *data)
	149	{
629bcb4b	150	pr_info("collie_bat_gpio irq\n");
f1fce597 TK	151	schedule_work(&bat_work);
	152	return IRQ_HANDLED;
	153	}
	154
	155	static void collie_bat_update(struct collie_bat *bat)
	156	{
	157	int old;
297d716f	158	struct power_supply *psy = bat->psy;
f1fce597 TK	159
	160	mutex_lock(&bat->work_lock);
	161
	162	old = bat->status;
	163
	164	if (bat->is_present && !bat->is_present(bat)) {
297d716f	165	printk(KERN_NOTICE "%s not present\n", psy->desc->name);
f1fce597 TK	166	bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
	167	bat->full_chrg = -1;
	168	} else if (power_supply_am_i_supplied(psy)) {
	169	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
	170	gpio_set_value(bat->gpio_charge_on, 1);
	171	mdelay(15);
	172	}
	173
	174	if (gpio_get_value(bat->gpio_full)) {
	175	if (old == POWER_SUPPLY_STATUS_CHARGING \|\|
	176	bat->full_chrg == -1)
	177	bat->full_chrg = collie_read_bat(bat);
	178
	179	gpio_set_value(bat->gpio_charge_on, 0);
	180	bat->status = POWER_SUPPLY_STATUS_FULL;
	181	} else {
	182	gpio_set_value(bat->gpio_charge_on, 1);
	183	bat->status = POWER_SUPPLY_STATUS_CHARGING;
	184	}
	185	} else {
	186	gpio_set_value(bat->gpio_charge_on, 0);
	187	bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	188	}
	189
	190	if (old != bat->status)
	191	power_supply_changed(psy);
	192
	193	mutex_unlock(&bat->work_lock);
	194	}
	195
	196	static void collie_bat_work(struct work_struct *work)
	197	{
	198	collie_bat_update(&collie_bat_main);
	199	}
	200
	201
	202	static enum power_supply_property collie_bat_main_props[] = {
	203	POWER_SUPPLY_PROP_STATUS,
	204	POWER_SUPPLY_PROP_TECHNOLOGY,
	205	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	206	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	207	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	208	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	209	POWER_SUPPLY_PROP_PRESENT,
	210	POWER_SUPPLY_PROP_TEMP,
	211	};
	212
	213	static enum power_supply_property collie_bat_bu_props[] = {
	214	POWER_SUPPLY_PROP_STATUS,
	215	POWER_SUPPLY_PROP_TECHNOLOGY,
	216	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	217	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	218	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	219	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	220	POWER_SUPPLY_PROP_PRESENT,
	221	};
	222
297d716f KK	223	static const struct power_supply_desc collie_bat_main_desc = {
	224	.name = "main-battery",
	225	.type = POWER_SUPPLY_TYPE_BATTERY,
	226	.properties = collie_bat_main_props,
	227	.num_properties = ARRAY_SIZE(collie_bat_main_props),
	228	.get_property = collie_bat_get_property,
	229	.external_power_changed = collie_bat_external_power_changed,
	230	.use_for_apm = 1,
	231	};
	232
f1fce597 TK	233	static struct collie_bat collie_bat_main = {
	234	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	235	.full_chrg = -1,
297d716f	236	.psy = NULL,
f1fce597 TK	237
	238	.gpio_full = COLLIE_GPIO_CO,
	239	.gpio_charge_on = COLLIE_GPIO_CHARGE_ON,
	240
	241	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
	242
	243	.gpio_bat = COLLIE_GPIO_MBAT_ON,
	244	.adc_bat = UCB_ADC_INP_AD1,
	245	.adc_bat_divider = 155,
	246	.bat_max = 4310000,
	247	.bat_min = 1551 * 1000000 / 414,
	248
	249	.gpio_temp = COLLIE_GPIO_TMP_ON,
	250	.adc_temp = UCB_ADC_INP_AD0,
	251	.adc_temp_divider = 10000,
	252	};
	253
297d716f KK	254	static const struct power_supply_desc collie_bat_bu_desc = {
	255	.name = "backup-battery",
	256	.type = POWER_SUPPLY_TYPE_BATTERY,
	257	.properties = collie_bat_bu_props,
	258	.num_properties = ARRAY_SIZE(collie_bat_bu_props),
	259	.get_property = collie_bat_get_property,
	260	.external_power_changed = collie_bat_external_power_changed,
	261	};
	262
f1fce597 TK	263	static struct collie_bat collie_bat_bu = {
	264	.status = POWER_SUPPLY_STATUS_UNKNOWN,
	265	.full_chrg = -1,
297d716f	266	.psy = NULL,
f1fce597 TK	267
	268	.gpio_full = -1,
	269	.gpio_charge_on = -1,
	270
	271	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
	272
	273	.gpio_bat = COLLIE_GPIO_BBAT_ON,
	274	.adc_bat = UCB_ADC_INP_AD1,
	275	.adc_bat_divider = 155,
	276	.bat_max = 3000000,
	277	.bat_min = 1900000,
	278
	279	.gpio_temp = -1,
	280	.adc_temp = -1,
	281	.adc_temp_divider = -1,
	282	};
	283
389cd203 AL	284	static struct gpio collie_batt_gpios[] = {
	285	{ COLLIE_GPIO_CO, GPIOF_IN, "main battery full" },
	286	{ COLLIE_GPIO_MAIN_BAT_LOW, GPIOF_IN, "main battery low" },
	287	{ COLLIE_GPIO_CHARGE_ON, GPIOF_OUT_INIT_LOW, "main charge on" },
	288	{ COLLIE_GPIO_MBAT_ON, GPIOF_OUT_INIT_LOW, "main battery" },
	289	{ COLLIE_GPIO_TMP_ON, GPIOF_OUT_INIT_LOW, "main battery temp" },
	290	{ COLLIE_GPIO_BBAT_ON, GPIOF_OUT_INIT_LOW, "backup battery" },
f1fce597 TK	291	};
	292
	293	#ifdef CONFIG_PM
1ba64114	294	static int collie_bat_suspend(struct ucb1x00_dev *dev)
f1fce597 TK	295	{
f1fce597 TK	296	/* flush all pending status updates */
43829731	297	flush_work(&bat_work);
f1300e7f DES	298
	299	if (device_may_wakeup(&dev->ucb->dev) &&
	300	collie_bat_main.status == POWER_SUPPLY_STATUS_CHARGING)
	301	wakeup_enabled = !enable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO));
	302	else
	303	wakeup_enabled = 0;
	304
f1fce597 TK	305	return 0;
	306	}
	307
	308	static int collie_bat_resume(struct ucb1x00_dev *dev)
	309	{
f1300e7f DES	310	if (wakeup_enabled)
	311	disable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO));
	312
f1fce597 TK	313	/* things may have changed while we were away */
	314	schedule_work(&bat_work);
	315	return 0;
	316	}
	317	#else
	318	#define collie_bat_suspend NULL
	319	#define collie_bat_resume NULL
	320	#endif
	321
c8afa640	322	static int collie_bat_probe(struct ucb1x00_dev *dev)
f1fce597 TK	323	{
f1fce597 TK	324	int ret;
297d716f	325	struct power_supply_config psy_main_cfg = {}, psy_bu_cfg = {};
f1fce597 TK	326
	327	if (!machine_is_collie())
	328	return -ENODEV;
	329
	330	ucb = dev->ucb;
	331
389cd203 AL	332	ret = gpio_request_array(collie_batt_gpios,
	333	ARRAY_SIZE(collie_batt_gpios));
	334	if (ret)
	335	return ret;
f1fce597 TK	336
	337	mutex_init(&collie_bat_main.work_lock);
	338
	339	INIT_WORK(&bat_work, collie_bat_work);
	340
297d716f KK	341	psy_main_cfg.drv_data = &collie_bat_main;
	342	collie_bat_main.psy = power_supply_register(&dev->ucb->dev,
	343	&collie_bat_main_desc,
	344	&psy_main_cfg);
	345	if (IS_ERR(collie_bat_main.psy)) {
	346	ret = PTR_ERR(collie_bat_main.psy);
f1fce597	347	goto err_psy_reg_main;
297d716f KK	348	}
297d716f KK	349
ce992369	350	psy_bu_cfg.drv_data = &collie_bat_bu;
297d716f KK	351	collie_bat_bu.psy = power_supply_register(&dev->ucb->dev,
	352	&collie_bat_bu_desc,
	353	&psy_bu_cfg);
	354	if (IS_ERR(collie_bat_bu.psy)) {
	355	ret = PTR_ERR(collie_bat_bu.psy);
f1fce597	356	goto err_psy_reg_bu;
297d716f	357	}
f1fce597 TK	358
	359	ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO),
	360	collie_bat_gpio_isr,
	361	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	362	"main full", &collie_bat_main);
f1300e7f DES	363	if (ret)
	364	goto err_irq;
	365
	366	device_init_wakeup(&ucb->dev, 1);
	367	schedule_work(&bat_work);
	368
	369	return 0;
	370
	371	err_irq:
297d716f	372	power_supply_unregister(collie_bat_bu.psy);
f1fce597	373	err_psy_reg_bu:
297d716f	374	power_supply_unregister(collie_bat_main.psy);
f1fce597 TK	375	err_psy_reg_main:
	376
	377	/* see comment in collie_bat_remove */
bc51e7ff	378	cancel_work_sync(&bat_work);
389cd203	379	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
f1fce597 TK	380	return ret;
	381	}
	382
415ec69f	383	static void collie_bat_remove(struct ucb1x00_dev *dev)
f1fce597	384	{
f1fce597 TK	385	free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main);
f1fce597 TK	386
297d716f KK	387	power_supply_unregister(collie_bat_bu.psy);
297d716f KK	388	power_supply_unregister(collie_bat_main.psy);
f1fce597 TK	389
f1fce597 TK	390	/*
bc51e7ff TH	391	* Now cancel the bat_work. We won't get any more schedules,
	392	* since all sources (isr and external_power_changed) are
	393	* unregistered now.
f1fce597	394	*/
bc51e7ff	395	cancel_work_sync(&bat_work);
389cd203	396	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
f1fce597 TK	397	}
	398
	399	static struct ucb1x00_driver collie_bat_driver = {
	400	.add = collie_bat_probe,
28ea73f4	401	.remove = collie_bat_remove,
f1fce597 TK	402	.suspend = collie_bat_suspend,
	403	.resume = collie_bat_resume,
	404	};
	405
	406	static int __init collie_bat_init(void)
	407	{
	408	return ucb1x00_register_driver(&collie_bat_driver);
	409	}
	410
	411	static void __exit collie_bat_exit(void)
	412	{
	413	ucb1x00_unregister_driver(&collie_bat_driver);
	414	}
	415
	416	module_init(collie_bat_init);
	417	module_exit(collie_bat_exit);
	418
	419	MODULE_LICENSE("GPL");
	420	MODULE_AUTHOR("Thomas Kunze");
	421	MODULE_DESCRIPTION("Collie battery driver");