[linux.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;

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 wakeup_enabled;

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;
	29
	30	struct collie_bat {
	31	int status;
297d716f	32	struct power_supply *psy;
f1fce597 TK	33	int full_chrg;
	34
	35	struct mutex work_lock; /* protects data */
	36
	37	bool (is_present)(struct collie_bat bat);
	38	int gpio_full;
	39	int gpio_charge_on;
	40
	41	int technology;
	42
	43	int gpio_bat;
	44	int adc_bat;
	45	int adc_bat_divider;
	46	int bat_max;
	47	int bat_min;
	48
	49	int gpio_temp;
	50	int adc_temp;
	51	int adc_temp_divider;
	52	};
	53
	54	static struct collie_bat collie_bat_main;
	55
	56	static unsigned long collie_read_bat(struct collie_bat *bat)
	57	{
	58	unsigned long value = 0;
	59
	60	if (bat->gpio_bat < 0 \|\| bat->adc_bat < 0)
	61	return 0;
	62	mutex_lock(&bat_lock);
	63	gpio_set_value(bat->gpio_bat, 1);
	64	msleep(5);
	65	ucb1x00_adc_enable(ucb);
	66	value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC);
	67	ucb1x00_adc_disable(ucb);
	68	gpio_set_value(bat->gpio_bat, 0);
	69	mutex_unlock(&bat_lock);
	70	value = value * 1000000 / bat->adc_bat_divider;
	71
	72	return value;
	73	}
	74
	75	static unsigned long collie_read_temp(struct collie_bat *bat)
	76	{
	77	unsigned long value = 0;
	78	if (bat->gpio_temp < 0 \|\| bat->adc_temp < 0)
	79	return 0;
	80
	81	mutex_lock(&bat_lock);
	82	gpio_set_value(bat->gpio_temp, 1);
	83	msleep(5);
	84	ucb1x00_adc_enable(ucb);
	85	value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC);
	86	ucb1x00_adc_disable(ucb);
	87	gpio_set_value(bat->gpio_temp, 0);
	88	mutex_unlock(&bat_lock);
	89
	90	value = value * 10000 / bat->adc_temp_divider;
	91
	92	return value;
	93	}
	94
	95	static int collie_bat_get_property(struct power_supply *psy,
	96	enum power_supply_property psp,
97	union power_supply_propval *val)
98	{
99	int ret = 0;
297d716f	100	struct collie_bat *bat = power_supply_get_drvdata(psy);
f1fce597 TK	101
	102	if (bat->is_present && !bat->is_present(bat)
	103	&& psp != POWER_SUPPLY_PROP_PRESENT) {
	104	return -ENODEV;
	105	}
	106
	107	switch (psp) {
	108	case POWER_SUPPLY_PROP_STATUS:
	109	val->intval = bat->status;
	110	break;
	111	case POWER_SUPPLY_PROP_TECHNOLOGY:
	112	val->intval = bat->technology;
	113	break;
	114	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	115	val->intval = collie_read_bat(bat);
	116	break;
	117	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
	118	if (bat->full_chrg == -1)
	119	val->intval = bat->bat_max;
	120	else
	121	val->intval = bat->full_chrg;
	122	break;
	123	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
	124	val->intval = bat->bat_max;
	125	break;
	126	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
	127	val->intval = bat->bat_min;
	128	break;
	129	case POWER_SUPPLY_PROP_TEMP:
	130	val->intval = collie_read_temp(bat);
	131	break;
	132	case POWER_SUPPLY_PROP_PRESENT:
	133	val->intval = bat->is_present ? bat->is_present(bat) : 1;
	134	break;
	135	default:
	136	ret = -EINVAL;
	137	break;
	138	}
	139	return ret;
	140	}
	141
	142	static void collie_bat_external_power_changed(struct power_supply *psy)
	143	{
	144	schedule_work(&bat_work);
	145	}
	146
	147	static irqreturn_t collie_bat_gpio_isr(int irq, void *data)
	148	{
629bcb4b	149	pr_info("collie_bat_gpio irq\n");
f1fce597 TK	150	schedule_work(&bat_work);
	151	return IRQ_HANDLED;
	152	}
	153
	154	static void collie_bat_update(struct collie_bat *bat)
	155	{
	156	int old;
297d716f	157	struct power_supply *psy = bat->psy;
f1fce597 TK	158
	159	mutex_lock(&bat->work_lock);
	160
	161	old = bat->status;
	162
	163	if (bat->is_present && !bat->is_present(bat)) {
297d716f	164	printk(KERN_NOTICE "%s not present\n", psy->desc->name);
f1fce597 TK	165	bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
	166	bat->full_chrg = -1;
	167	} else if (power_supply_am_i_supplied(psy)) {
	168	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
	169	gpio_set_value(bat->gpio_charge_on, 1);
	170	mdelay(15);
	171	}
	172
	173	if (gpio_get_value(bat->gpio_full)) {
	174	if (old == POWER_SUPPLY_STATUS_CHARGING \|\|
	175	bat->full_chrg == -1)
	176	bat->full_chrg = collie_read_bat(bat);
	177
	178	gpio_set_value(bat->gpio_charge_on, 0);
	179	bat->status = POWER_SUPPLY_STATUS_FULL;
	180	} else {
	181	gpio_set_value(bat->gpio_charge_on, 1);
	182	bat->status = POWER_SUPPLY_STATUS_CHARGING;
	183	}
	184	} else {
	185	gpio_set_value(bat->gpio_charge_on, 0);
	186	bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
	187	}
	188
	189	if (old != bat->status)
	190	power_supply_changed(psy);
	191
	192	mutex_unlock(&bat->work_lock);
	193	}
	194
	195	static void collie_bat_work(struct work_struct *work)
	196	{
	197	collie_bat_update(&collie_bat_main);
	198	}
	199
	200
	201	static enum power_supply_property collie_bat_main_props[] = {
	202	POWER_SUPPLY_PROP_STATUS,
	203	POWER_SUPPLY_PROP_TECHNOLOGY,
	204	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	205	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	206	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	207	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	208	POWER_SUPPLY_PROP_PRESENT,
	209	POWER_SUPPLY_PROP_TEMP,
	210	};
	211
	212	static enum power_supply_property collie_bat_bu_props[] = {
	213	POWER_SUPPLY_PROP_STATUS,
	214	POWER_SUPPLY_PROP_TECHNOLOGY,
	215	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	216	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	217	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	218	POWER_SUPPLY_PROP_VOLTAGE_MAX,
	219	POWER_SUPPLY_PROP_PRESENT,
	220	};
	221
297d716f KK	222	static const struct power_supply_desc collie_bat_main_desc = {
	223	.name = "main-battery",
	224	.type = POWER_SUPPLY_TYPE_BATTERY,
	225	.properties = collie_bat_main_props,
	226	.num_properties = ARRAY_SIZE(collie_bat_main_props),
	227	.get_property = collie_bat_get_property,
	228	.external_power_changed = collie_bat_external_power_changed,
	229	.use_for_apm = 1,
	230	};
	231
f1fce597 TK	232	static struct collie_bat collie_bat_main = {
	233	.status = POWER_SUPPLY_STATUS_DISCHARGING,
	234	.full_chrg = -1,
297d716f	235	.psy = NULL,
f1fce597 TK	236
	237	.gpio_full = COLLIE_GPIO_CO,
	238	.gpio_charge_on = COLLIE_GPIO_CHARGE_ON,
	239
	240	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
	241
	242	.gpio_bat = COLLIE_GPIO_MBAT_ON,
	243	.adc_bat = UCB_ADC_INP_AD1,
	244	.adc_bat_divider = 155,
	245	.bat_max = 4310000,
	246	.bat_min = 1551 * 1000000 / 414,
	247
	248	.gpio_temp = COLLIE_GPIO_TMP_ON,
	249	.adc_temp = UCB_ADC_INP_AD0,
	250	.adc_temp_divider = 10000,
	251	};
	252
297d716f KK	253	static const struct power_supply_desc collie_bat_bu_desc = {
	254	.name = "backup-battery",
	255	.type = POWER_SUPPLY_TYPE_BATTERY,
	256	.properties = collie_bat_bu_props,
	257	.num_properties = ARRAY_SIZE(collie_bat_bu_props),
	258	.get_property = collie_bat_get_property,
	259	.external_power_changed = collie_bat_external_power_changed,
	260	};
	261
f1fce597 TK	262	static struct collie_bat collie_bat_bu = {
	263	.status = POWER_SUPPLY_STATUS_UNKNOWN,
	264	.full_chrg = -1,
297d716f	265	.psy = NULL,
f1fce597 TK	266
	267	.gpio_full = -1,
	268	.gpio_charge_on = -1,
	269
	270	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
	271
	272	.gpio_bat = COLLIE_GPIO_BBAT_ON,
	273	.adc_bat = UCB_ADC_INP_AD1,
	274	.adc_bat_divider = 155,
	275	.bat_max = 3000000,
	276	.bat_min = 1900000,
	277
	278	.gpio_temp = -1,
	279	.adc_temp = -1,
	280	.adc_temp_divider = -1,
	281	};
	282
389cd203 AL	283	static struct gpio collie_batt_gpios[] = {
	284	{ COLLIE_GPIO_CO, GPIOF_IN, "main battery full" },
	285	{ COLLIE_GPIO_MAIN_BAT_LOW, GPIOF_IN, "main battery low" },
	286	{ COLLIE_GPIO_CHARGE_ON, GPIOF_OUT_INIT_LOW, "main charge on" },
	287	{ COLLIE_GPIO_MBAT_ON, GPIOF_OUT_INIT_LOW, "main battery" },
	288	{ COLLIE_GPIO_TMP_ON, GPIOF_OUT_INIT_LOW, "main battery temp" },
	289	{ COLLIE_GPIO_BBAT_ON, GPIOF_OUT_INIT_LOW, "backup battery" },
f1fce597 TK	290	};
	291
	292	#ifdef CONFIG_PM
6a65b2b2 AB	293	static int wakeup_enabled;
6a65b2b2 AB	294
1ba64114	295	static int collie_bat_suspend(struct ucb1x00_dev *dev)
f1fce597 TK	296	{
f1fce597 TK	297	/* flush all pending status updates */
43829731	298	flush_work(&bat_work);
f1300e7f DB	299
	300	if (device_may_wakeup(&dev->ucb->dev) &&
	301	collie_bat_main.status == POWER_SUPPLY_STATUS_CHARGING)
	302	wakeup_enabled = !enable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO));
	303	else
	304	wakeup_enabled = 0;
	305
f1fce597 TK	306	return 0;
	307	}
	308
	309	static int collie_bat_resume(struct ucb1x00_dev *dev)
	310	{
f1300e7f DB	311	if (wakeup_enabled)
	312	disable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO));
	313
f1fce597 TK	314	/* things may have changed while we were away */
	315	schedule_work(&bat_work);
	316	return 0;
	317	}
	318	#else
	319	#define collie_bat_suspend NULL
	320	#define collie_bat_resume NULL
	321	#endif
	322
c8afa640	323	static int collie_bat_probe(struct ucb1x00_dev *dev)
f1fce597 TK	324	{
f1fce597 TK	325	int ret;
297d716f	326	struct power_supply_config psy_main_cfg = {}, psy_bu_cfg = {};
f1fce597 TK	327
	328	if (!machine_is_collie())
	329	return -ENODEV;
	330
	331	ucb = dev->ucb;
	332
389cd203 AL	333	ret = gpio_request_array(collie_batt_gpios,
	334	ARRAY_SIZE(collie_batt_gpios));
	335	if (ret)
	336	return ret;
f1fce597 TK	337
	338	mutex_init(&collie_bat_main.work_lock);
	339
	340	INIT_WORK(&bat_work, collie_bat_work);
	341
297d716f KK	342	psy_main_cfg.drv_data = &collie_bat_main;
	343	collie_bat_main.psy = power_supply_register(&dev->ucb->dev,
	344	&collie_bat_main_desc,
	345	&psy_main_cfg);
	346	if (IS_ERR(collie_bat_main.psy)) {
	347	ret = PTR_ERR(collie_bat_main.psy);
f1fce597	348	goto err_psy_reg_main;
297d716f KK	349	}
297d716f KK	350
ce992369	351	psy_bu_cfg.drv_data = &collie_bat_bu;
297d716f KK	352	collie_bat_bu.psy = power_supply_register(&dev->ucb->dev,
	353	&collie_bat_bu_desc,
	354	&psy_bu_cfg);
	355	if (IS_ERR(collie_bat_bu.psy)) {
	356	ret = PTR_ERR(collie_bat_bu.psy);
f1fce597	357	goto err_psy_reg_bu;
297d716f	358	}
f1fce597 TK	359
	360	ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO),
	361	collie_bat_gpio_isr,
	362	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	363	"main full", &collie_bat_main);
f1300e7f DB	364	if (ret)
	365	goto err_irq;
	366
	367	device_init_wakeup(&ucb->dev, 1);
	368	schedule_work(&bat_work);
	369
	370	return 0;
	371
	372	err_irq:
297d716f	373	power_supply_unregister(collie_bat_bu.psy);
f1fce597	374	err_psy_reg_bu:
297d716f	375	power_supply_unregister(collie_bat_main.psy);
f1fce597 TK	376	err_psy_reg_main:
	377
	378	/* see comment in collie_bat_remove */
bc51e7ff	379	cancel_work_sync(&bat_work);
389cd203	380	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
f1fce597 TK	381	return ret;
	382	}
	383
415ec69f	384	static void collie_bat_remove(struct ucb1x00_dev *dev)
f1fce597	385	{
f1fce597 TK	386	free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main);
f1fce597 TK	387
297d716f KK	388	power_supply_unregister(collie_bat_bu.psy);
297d716f KK	389	power_supply_unregister(collie_bat_main.psy);
f1fce597 TK	390
f1fce597 TK	391	/*
bc51e7ff TH	392	* Now cancel the bat_work. We won't get any more schedules,
	393	* since all sources (isr and external_power_changed) are
	394	* unregistered now.
f1fce597	395	*/
bc51e7ff	396	cancel_work_sync(&bat_work);
389cd203	397	gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios));
f1fce597 TK	398	}
	399
	400	static struct ucb1x00_driver collie_bat_driver = {
	401	.add = collie_bat_probe,
28ea73f4	402	.remove = collie_bat_remove,
f1fce597 TK	403	.suspend = collie_bat_suspend,
	404	.resume = collie_bat_resume,
	405	};
	406
	407	static int __init collie_bat_init(void)
	408	{
	409	return ucb1x00_register_driver(&collie_bat_driver);
	410	}
	411
	412	static void __exit collie_bat_exit(void)
	413	{
	414	ucb1x00_unregister_driver(&collie_bat_driver);
	415	}
	416
	417	module_init(collie_bat_init);
	418	module_exit(collie_bat_exit);
	419
	420	MODULE_LICENSE("GPL");
	421	MODULE_AUTHOR("Thomas Kunze");
	422	MODULE_DESCRIPTION("Collie battery driver");