[linux.git] / drivers / power / jz4740-battery.c

/*
 * Battery measurement code for Ingenic JZ SOC.
 *
 * Copyright (C) 2009 Jiejing Zhang <[email protected]>
 * Copyright (C) 2010, Lars-Peter Clausen <[email protected]>
 *
 * based on tosa_battery.c
 *
 * Copyright (C) 2008 Marek Vasut <[email protected]>
*
 * 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/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/io.h>

#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/power_supply.h>

#include <linux/power/jz4740-battery.h>
#include <linux/jz4740-adc.h>

struct jz_battery {
	struct jz_battery_platform_data *pdata;
	struct platform_device *pdev;

	struct resource *mem;
	void __iomem *base;

	int irq;
	int charge_irq;

	const struct mfd_cell *cell;

	int status;
	long voltage;

	struct completion read_completion;

	struct power_supply battery;
	struct delayed_work work;

	struct mutex lock;
};

static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy)
{
	return container_of(psy, struct jz_battery, battery);
}

static irqreturn_t jz_battery_irq_handler(int irq, void *devid)
{
	struct jz_battery *battery = devid;

	complete(&battery->read_completion);
	return IRQ_HANDLED;
}

static long jz_battery_read_voltage(struct jz_battery *battery)
{
	long t;
	unsigned long val;
	long voltage;

	mutex_lock(&battery->lock);

	INIT_COMPLETION(battery->read_completion);

	enable_irq(battery->irq);
	battery->cell->enable(battery->pdev);

	t = wait_for_completion_interruptible_timeout(&battery->read_completion,
		HZ);

	if (t > 0) {
		val = readw(battery->base) & 0xfff;

		if (battery->pdata->info.voltage_max_design <= 2500000)
			val = (val * 78125UL) >> 7UL;
		else
			val = ((val * 924375UL) >> 9UL) + 33000;
		voltage = (long)val;
	} else {
		voltage = t ? t : -ETIMEDOUT;
	}

	battery->cell->disable(battery->pdev);
	disable_irq(battery->irq);

	mutex_unlock(&battery->lock);

	return voltage;
}

static int jz_battery_get_capacity(struct power_supply *psy)
{
	struct jz_battery *jz_battery = psy_to_jz_battery(psy);
	struct power_supply_info *info = &jz_battery->pdata->info;
	long voltage;
	int ret;
	int voltage_span;

	voltage = jz_battery_read_voltage(jz_battery);

	if (voltage < 0)
		return voltage;

	voltage_span = info->voltage_max_design - info->voltage_min_design;
	ret = ((voltage - info->voltage_min_design) * 100) / voltage_span;

	if (ret > 100)
		ret = 100;
	else if (ret < 0)
		ret = 0;

	return ret;
}

static int jz_battery_get_property(struct power_supply *psy,
	enum power_supply_property psp, union power_supply_propval *val)
{
	struct jz_battery *jz_battery = psy_to_jz_battery(psy);
	struct power_supply_info *info = &jz_battery->pdata->info;
	long voltage;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = jz_battery->status;
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = jz_battery->pdata->info.technology;
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		voltage = jz_battery_read_voltage(jz_battery);
		if (voltage < info->voltage_min_design)
			val->intval = POWER_SUPPLY_HEALTH_DEAD;
		else
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		val->intval = jz_battery_get_capacity(psy);
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = jz_battery_read_voltage(jz_battery);
		if (val->intval < 0)
			return val->intval;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
		val->intval = info->voltage_max_design;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
		val->intval = info->voltage_min_design;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = 1;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static void jz_battery_external_power_changed(struct power_supply *psy)
{
	struct jz_battery *jz_battery = psy_to_jz_battery(psy);

	cancel_delayed_work(&jz_battery->work);
	schedule_delayed_work(&jz_battery->work, 0);
}

static irqreturn_t jz_battery_charge_irq(int irq, void *data)
{
	struct jz_battery *jz_battery = data;

	cancel_delayed_work(&jz_battery->work);
	schedule_delayed_work(&jz_battery->work, 0);

	return IRQ_HANDLED;
}

static void jz_battery_update(struct jz_battery *jz_battery)
{
	int status;
	long voltage;
	bool has_changed = false;
	int is_charging;

	if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
		is_charging = gpio_get_value(jz_battery->pdata->gpio_charge);
		is_charging ^= jz_battery->pdata->gpio_charge_active_low;
		if (is_charging)
			status = POWER_SUPPLY_STATUS_CHARGING;
		else
			status = POWER_SUPPLY_STATUS_NOT_CHARGING;

		if (status != jz_battery->status) {
			jz_battery->status = status;
			has_changed = true;
		}
	}

	voltage = jz_battery_read_voltage(jz_battery);
	if (abs(voltage - jz_battery->voltage) < 50000) {
		jz_battery->voltage = voltage;
		has_changed = true;
	}

	if (has_changed)
		power_supply_changed(&jz_battery->battery);
}

static enum power_supply_property jz_battery_properties[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
	POWER_SUPPLY_PROP_PRESENT,
};

static void jz_battery_work(struct work_struct *work)
{
	/* Too small interval will increase system workload */
	const int interval = HZ * 30;
	struct jz_battery *jz_battery = container_of(work, struct jz_battery,
					    work.work);

	jz_battery_update(jz_battery);
	schedule_delayed_work(&jz_battery->work, interval);
}

static int __devinit jz_battery_probe(struct platform_device *pdev)
{
	int ret = 0;
	struct jz_battery_platform_data *pdata = pdev->dev.parent->platform_data;
	struct jz_battery *jz_battery;
	struct power_supply *battery;

	if (!pdata) {
		dev_err(&pdev->dev, "No platform_data supplied\n");
		return -ENXIO;
	}

	jz_battery = kzalloc(sizeof(*jz_battery), GFP_KERNEL);
	if (!jz_battery) {
		dev_err(&pdev->dev, "Failed to allocate driver structure\n");
		return -ENOMEM;
	}

	jz_battery->cell = mfd_get_cell(pdev);

	jz_battery->irq = platform_get_irq(pdev, 0);
	if (jz_battery->irq < 0) {
		ret = jz_battery->irq;
		dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret);
		goto err_free;
	}

	jz_battery->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!jz_battery->mem) {
		ret = -ENOENT;
		dev_err(&pdev->dev, "Failed to get platform mmio resource\n");
		goto err_free;
	}

	jz_battery->mem = request_mem_region(jz_battery->mem->start,
				resource_size(jz_battery->mem),	pdev->name);
	if (!jz_battery->mem) {
		ret = -EBUSY;
		dev_err(&pdev->dev, "Failed to request mmio memory region\n");
		goto err_free;
	}

	jz_battery->base = ioremap_nocache(jz_battery->mem->start,
				resource_size(jz_battery->mem));
	if (!jz_battery->base) {
		ret = -EBUSY;
		dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
		goto err_release_mem_region;
	}

	battery = &jz_battery->battery;
	battery->name = pdata->info.name;
	battery->type = POWER_SUPPLY_TYPE_BATTERY;
	battery->properties	= jz_battery_properties;
	battery->num_properties	= ARRAY_SIZE(jz_battery_properties);
	battery->get_property = jz_battery_get_property;
	battery->external_power_changed = jz_battery_external_power_changed;
	battery->use_for_apm = 1;

	jz_battery->pdata = pdata;
	jz_battery->pdev = pdev;

	init_completion(&jz_battery->read_completion);
	mutex_init(&jz_battery->lock);

	INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work);

	ret = request_irq(jz_battery->irq, jz_battery_irq_handler, 0, pdev->name,
			jz_battery);
	if (ret) {
		dev_err(&pdev->dev, "Failed to request irq %d\n", ret);
		goto err_iounmap;
	}
	disable_irq(jz_battery->irq);

	if (gpio_is_valid(pdata->gpio_charge)) {
		ret = gpio_request(pdata->gpio_charge, dev_name(&pdev->dev));
		if (ret) {
			dev_err(&pdev->dev, "charger state gpio request failed.\n");
			goto err_free_irq;
		}
		ret = gpio_direction_input(pdata->gpio_charge);
		if (ret) {
			dev_err(&pdev->dev, "charger state gpio set direction failed.\n");
			goto err_free_gpio;
		}

		jz_battery->charge_irq = gpio_to_irq(pdata->gpio_charge);

		if (jz_battery->charge_irq >= 0) {
			ret = request_irq(jz_battery->charge_irq,
				    jz_battery_charge_irq,
				    IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
				    dev_name(&pdev->dev), jz_battery);
			if (ret) {
				dev_err(&pdev->dev, "Failed to request charge irq: %d\n", ret);
				goto err_free_gpio;
			}
		}
	} else {
		jz_battery->charge_irq = -1;
	}

	if (jz_battery->pdata->info.voltage_max_design <= 2500000)
		jz4740_adc_set_config(pdev->dev.parent, JZ_ADC_CONFIG_BAT_MB,
			JZ_ADC_CONFIG_BAT_MB);
	else
		jz4740_adc_set_config(pdev->dev.parent, JZ_ADC_CONFIG_BAT_MB, 0);

	ret = power_supply_register(&pdev->dev, &jz_battery->battery);
	if (ret) {
		dev_err(&pdev->dev, "power supply battery register failed.\n");
		goto err_free_charge_irq;
	}

	platform_set_drvdata(pdev, jz_battery);
	schedule_delayed_work(&jz_battery->work, 0);

	return 0;

err_free_charge_irq:
	if (jz_battery->charge_irq >= 0)
		free_irq(jz_battery->charge_irq, jz_battery);
err_free_gpio:
	if (gpio_is_valid(pdata->gpio_charge))
		gpio_free(jz_battery->pdata->gpio_charge);
err_free_irq:
	free_irq(jz_battery->irq, jz_battery);
err_iounmap:
	platform_set_drvdata(pdev, NULL);
	iounmap(jz_battery->base);
err_release_mem_region:
	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
err_free:
	kfree(jz_battery);
	return ret;
}

static int __devexit jz_battery_remove(struct platform_device *pdev)
{
	struct jz_battery *jz_battery = platform_get_drvdata(pdev);

	cancel_delayed_work_sync(&jz_battery->work);

	if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
		if (jz_battery->charge_irq >= 0)
			free_irq(jz_battery->charge_irq, jz_battery);
		gpio_free(jz_battery->pdata->gpio_charge);
	}

	power_supply_unregister(&jz_battery->battery);

	free_irq(jz_battery->irq, jz_battery);

	iounmap(jz_battery->base);
	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
	kfree(jz_battery);

	return 0;
}

#ifdef CONFIG_PM
static int jz_battery_suspend(struct device *dev)
{
	struct jz_battery *jz_battery = dev_get_drvdata(dev);

	cancel_delayed_work_sync(&jz_battery->work);
	jz_battery->status = POWER_SUPPLY_STATUS_UNKNOWN;

	return 0;
}

static int jz_battery_resume(struct device *dev)
{
	struct jz_battery *jz_battery = dev_get_drvdata(dev);

	schedule_delayed_work(&jz_battery->work, 0);

	return 0;
}

static const struct dev_pm_ops jz_battery_pm_ops = {
	.suspend	= jz_battery_suspend,
	.resume		= jz_battery_resume,
};

#define JZ_BATTERY_PM_OPS (&jz_battery_pm_ops)
#else
#define JZ_BATTERY_PM_OPS NULL
#endif

static struct platform_driver jz_battery_driver = {
	.probe		= jz_battery_probe,
	.remove		= __devexit_p(jz_battery_remove),
	.driver = {
		.name = "jz4740-battery",
		.owner = THIS_MODULE,
		.pm = JZ_BATTERY_PM_OPS,
	},
};

module_platform_driver(jz_battery_driver);

MODULE_ALIAS("platform:jz4740-battery");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>");
MODULE_DESCRIPTION("JZ4740 SoC battery driver");
Commit	Line	Data
f6a21388 LPC	1	/*
	2	* Battery measurement code for Ingenic JZ SOC.
	3	*
	4	* Copyright (C) 2009 Jiejing Zhang <[email protected]>
	5	* Copyright (C) 2010, Lars-Peter Clausen <[email protected]>
	6	*
	7	* based on tosa_battery.c
	8	*
	9	* Copyright (C) 2008 Marek Vasut <[email protected]>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*
	15	*/
	16
	17	#include <linux/interrupt.h>
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/slab.h>
f3dcab70	22	#include <linux/io.h>
f6a21388 LPC	23
	24	#include <linux/delay.h>
	25	#include <linux/gpio.h>
	26	#include <linux/mfd/core.h>
	27	#include <linux/power_supply.h>
	28
	29	#include <linux/power/jz4740-battery.h>
	30	#include <linux/jz4740-adc.h>
	31
	32	struct jz_battery {
	33	struct jz_battery_platform_data *pdata;
	34	struct platform_device *pdev;
	35
	36	struct resource *mem;
	37	void __iomem *base;
	38
	39	int irq;
	40	int charge_irq;
	41
e9300066	42	const struct mfd_cell *cell;
f6a21388 LPC	43
	44	int status;
	45	long voltage;
	46
	47	struct completion read_completion;
	48
	49	struct power_supply battery;
	50	struct delayed_work work;
8ec98fe0 LPC	51
8ec98fe0 LPC	52	struct mutex lock;
f6a21388 LPC	53	};
	54
	55	static inline struct jz_battery psy_to_jz_battery(struct power_supply psy)
	56	{
	57	return container_of(psy, struct jz_battery, battery);
	58	}
	59
	60	static irqreturn_t jz_battery_irq_handler(int irq, void *devid)
	61	{
	62	struct jz_battery *battery = devid;
	63
	64	complete(&battery->read_completion);
	65	return IRQ_HANDLED;
	66	}
	67
	68	static long jz_battery_read_voltage(struct jz_battery *battery)
	69	{
ef7906f3	70	long t;
f6a21388 LPC	71	unsigned long val;
	72	long voltage;
	73
8ec98fe0 LPC	74	mutex_lock(&battery->lock);
8ec98fe0 LPC	75
f6a21388 LPC	76	INIT_COMPLETION(battery->read_completion);
	77
	78	enable_irq(battery->irq);
	79	battery->cell->enable(battery->pdev);
	80
	81	t = wait_for_completion_interruptible_timeout(&battery->read_completion,
	82	HZ);
	83
	84	if (t > 0) {
	85	val = readw(battery->base) & 0xfff;
	86
	87	if (battery->pdata->info.voltage_max_design <= 2500000)
	88	val = (val * 78125UL) >> 7UL;
	89	else
	90	val = ((val * 924375UL) >> 9UL) + 33000;
	91	voltage = (long)val;
	92	} else {
	93	voltage = t ? t : -ETIMEDOUT;
	94	}
	95
	96	battery->cell->disable(battery->pdev);
	97	disable_irq(battery->irq);
	98
8ec98fe0 LPC	99	mutex_unlock(&battery->lock);
8ec98fe0 LPC	100
f6a21388 LPC	101	return voltage;
	102	}
	103
	104	static int jz_battery_get_capacity(struct power_supply *psy)
	105	{
	106	struct jz_battery *jz_battery = psy_to_jz_battery(psy);
	107	struct power_supply_info *info = &jz_battery->pdata->info;
	108	long voltage;
	109	int ret;
	110	int voltage_span;
	111
	112	voltage = jz_battery_read_voltage(jz_battery);
	113
	114	if (voltage < 0)
	115	return voltage;
	116
	117	voltage_span = info->voltage_max_design - info->voltage_min_design;
	118	ret = ((voltage - info->voltage_min_design) * 100) / voltage_span;
	119
	120	if (ret > 100)
	121	ret = 100;
	122	else if (ret < 0)
	123	ret = 0;
	124
	125	return ret;
	126	}
	127
	128	static int jz_battery_get_property(struct power_supply *psy,
	129	enum power_supply_property psp, union power_supply_propval *val)
	130	{
	131	struct jz_battery *jz_battery = psy_to_jz_battery(psy);
	132	struct power_supply_info *info = &jz_battery->pdata->info;
	133	long voltage;
	134
	135	switch (psp) {
	136	case POWER_SUPPLY_PROP_STATUS:
	137	val->intval = jz_battery->status;
	138	break;
	139	case POWER_SUPPLY_PROP_TECHNOLOGY:
	140	val->intval = jz_battery->pdata->info.technology;
	141	break;
	142	case POWER_SUPPLY_PROP_HEALTH:
	143	voltage = jz_battery_read_voltage(jz_battery);
	144	if (voltage < info->voltage_min_design)
	145	val->intval = POWER_SUPPLY_HEALTH_DEAD;
	146	else
	147	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	148	break;
	149	case POWER_SUPPLY_PROP_CAPACITY:
	150	val->intval = jz_battery_get_capacity(psy);
	151	break;
	152	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	153	val->intval = jz_battery_read_voltage(jz_battery);
	154	if (val->intval < 0)
	155	return val->intval;
	156	break;
	157	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
	158	val->intval = info->voltage_max_design;
	159	break;
	160	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
	161	val->intval = info->voltage_min_design;
	162	break;
	163	case POWER_SUPPLY_PROP_PRESENT:
	164	val->intval = 1;
165	break;
166	default:
167	return -EINVAL;
168	}
169	return 0;
170	}
171
172	static void jz_battery_external_power_changed(struct power_supply *psy)
173	{
174	struct jz_battery *jz_battery = psy_to_jz_battery(psy);
175
176	cancel_delayed_work(&jz_battery->work);
177	schedule_delayed_work(&jz_battery->work, 0);
178	}
179
180	static irqreturn_t jz_battery_charge_irq(int irq, void *data)
181	{
182	struct jz_battery *jz_battery = data;
183
184	cancel_delayed_work(&jz_battery->work);
185	schedule_delayed_work(&jz_battery->work, 0);
186
187	return IRQ_HANDLED;
188	}
189
190	static void jz_battery_update(struct jz_battery *jz_battery)
191	{
192	int status;
193	long voltage;
194	bool has_changed = false;
195	int is_charging;
196
197	if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
198	is_charging = gpio_get_value(jz_battery->pdata->gpio_charge);
199	is_charging ^= jz_battery->pdata->gpio_charge_active_low;
200	if (is_charging)
201	status = POWER_SUPPLY_STATUS_CHARGING;
202	else
203	status = POWER_SUPPLY_STATUS_NOT_CHARGING;
204
205	if (status != jz_battery->status) {
206	jz_battery->status = status;
207	has_changed = true;
208	}
209	}
210
211	voltage = jz_battery_read_voltage(jz_battery);
212	if (abs(voltage - jz_battery->voltage) < 50000) {
213	jz_battery->voltage = voltage;
214	has_changed = true;
215	}
216
217	if (has_changed)
218	power_supply_changed(&jz_battery->battery);
219	}
220
221	static enum power_supply_property jz_battery_properties[] = {
222	POWER_SUPPLY_PROP_STATUS,
223	POWER_SUPPLY_PROP_TECHNOLOGY,
224	POWER_SUPPLY_PROP_HEALTH,
225	POWER_SUPPLY_PROP_CAPACITY,
226	POWER_SUPPLY_PROP_VOLTAGE_NOW,
227	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
228	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
229	POWER_SUPPLY_PROP_PRESENT,
230	};
231
232	static void jz_battery_work(struct work_struct *work)
233	{
234	/* Too small interval will increase system workload */
235	const int interval = HZ * 30;
236	struct jz_battery *jz_battery = container_of(work, struct jz_battery,
237	work.work);
238
239	jz_battery_update(jz_battery);
240	schedule_delayed_work(&jz_battery->work, interval);
241	}
242
243	static int __devinit jz_battery_probe(struct platform_device *pdev)
244	{
245	int ret = 0;
246	struct jz_battery_platform_data *pdata = pdev->dev.parent->platform_data;
247	struct jz_battery *jz_battery;
248	struct power_supply *battery;
249
8477cedb LPC	250	if (!pdata) {
	251	dev_err(&pdev->dev, "No platform_data supplied\n");
	252	return -ENXIO;
	253	}
	254
f6a21388 LPC	255	jz_battery = kzalloc(sizeof(*jz_battery), GFP_KERNEL);
	256	if (!jz_battery) {
	257	dev_err(&pdev->dev, "Failed to allocate driver structure\n");
	258	return -ENOMEM;
	259	}
	260
6a54ac21	261	jz_battery->cell = mfd_get_cell(pdev);
f6a21388 LPC	262
	263	jz_battery->irq = platform_get_irq(pdev, 0);
	264	if (jz_battery->irq < 0) {
	265	ret = jz_battery->irq;
	266	dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret);
	267	goto err_free;
	268	}
	269
	270	jz_battery->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	271	if (!jz_battery->mem) {
	272	ret = -ENOENT;
	273	dev_err(&pdev->dev, "Failed to get platform mmio resource\n");
	274	goto err_free;
	275	}
	276
	277	jz_battery->mem = request_mem_region(jz_battery->mem->start,
	278	resource_size(jz_battery->mem), pdev->name);
	279	if (!jz_battery->mem) {
	280	ret = -EBUSY;
	281	dev_err(&pdev->dev, "Failed to request mmio memory region\n");
	282	goto err_free;
	283	}
	284
	285	jz_battery->base = ioremap_nocache(jz_battery->mem->start,
	286	resource_size(jz_battery->mem));
	287	if (!jz_battery->base) {
	288	ret = -EBUSY;
	289	dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
	290	goto err_release_mem_region;
	291	}
	292
	293	battery = &jz_battery->battery;
	294	battery->name = pdata->info.name;
	295	battery->type = POWER_SUPPLY_TYPE_BATTERY;
	296	battery->properties = jz_battery_properties;
	297	battery->num_properties = ARRAY_SIZE(jz_battery_properties);
	298	battery->get_property = jz_battery_get_property;
	299	battery->external_power_changed = jz_battery_external_power_changed;
	300	battery->use_for_apm = 1;
	301
	302	jz_battery->pdata = pdata;
	303	jz_battery->pdev = pdev;
	304
	305	init_completion(&jz_battery->read_completion);
8ec98fe0	306	mutex_init(&jz_battery->lock);
f6a21388 LPC	307
	308	INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work);
	309
	310	ret = request_irq(jz_battery->irq, jz_battery_irq_handler, 0, pdev->name,
	311	jz_battery);
	312	if (ret) {
	313	dev_err(&pdev->dev, "Failed to request irq %d\n", ret);
	314	goto err_iounmap;
	315	}
	316	disable_irq(jz_battery->irq);
	317
	318	if (gpio_is_valid(pdata->gpio_charge)) {
	319	ret = gpio_request(pdata->gpio_charge, dev_name(&pdev->dev));
	320	if (ret) {
	321	dev_err(&pdev->dev, "charger state gpio request failed.\n");
	322	goto err_free_irq;
	323	}
	324	ret = gpio_direction_input(pdata->gpio_charge);
	325	if (ret) {
	326	dev_err(&pdev->dev, "charger state gpio set direction failed.\n");
	327	goto err_free_gpio;
	328	}
	329
	330	jz_battery->charge_irq = gpio_to_irq(pdata->gpio_charge);
	331
	332	if (jz_battery->charge_irq >= 0) {
	333	ret = request_irq(jz_battery->charge_irq,
	334	jz_battery_charge_irq,
	335	IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
	336	dev_name(&pdev->dev), jz_battery);
	337	if (ret) {
	338	dev_err(&pdev->dev, "Failed to request charge irq: %d\n", ret);
	339	goto err_free_gpio;
	340	}
	341	}
	342	} else {
	343	jz_battery->charge_irq = -1;
	344	}
	345
	346	if (jz_battery->pdata->info.voltage_max_design <= 2500000)
	347	jz4740_adc_set_config(pdev->dev.parent, JZ_ADC_CONFIG_BAT_MB,
	348	JZ_ADC_CONFIG_BAT_MB);
	349	else
	350	jz4740_adc_set_config(pdev->dev.parent, JZ_ADC_CONFIG_BAT_MB, 0);
	351
	352	ret = power_supply_register(&pdev->dev, &jz_battery->battery);
	353	if (ret) {
	354	dev_err(&pdev->dev, "power supply battery register failed.\n");
	355	goto err_free_charge_irq;
	356	}
	357
	358	platform_set_drvdata(pdev, jz_battery);
	359	schedule_delayed_work(&jz_battery->work, 0);
	360
	361	return 0;
	362
	363	err_free_charge_irq:
	364	if (jz_battery->charge_irq >= 0)
	365	free_irq(jz_battery->charge_irq, jz_battery);
	366	err_free_gpio:
	367	if (gpio_is_valid(pdata->gpio_charge))
	368	gpio_free(jz_battery->pdata->gpio_charge);
	369	err_free_irq:
	370	free_irq(jz_battery->irq, jz_battery);
371	err_iounmap:
372	platform_set_drvdata(pdev, NULL);
373	iounmap(jz_battery->base);
374	err_release_mem_region:
375	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
376	err_free:
377	kfree(jz_battery);
378	return ret;
379	}
380
381	static int __devexit jz_battery_remove(struct platform_device *pdev)
382	{
383	struct jz_battery *jz_battery = platform_get_drvdata(pdev);
384
385	cancel_delayed_work_sync(&jz_battery->work);
386
387	if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
388	if (jz_battery->charge_irq >= 0)
389	free_irq(jz_battery->charge_irq, jz_battery);
390	gpio_free(jz_battery->pdata->gpio_charge);
391	}
392
393	power_supply_unregister(&jz_battery->battery);
394
395	free_irq(jz_battery->irq, jz_battery);
396
397	iounmap(jz_battery->base);
398	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
5f29895f	399	kfree(jz_battery);
f6a21388 LPC	400
	401	return 0;
	402	}
	403
	404	#ifdef CONFIG_PM
	405	static int jz_battery_suspend(struct device *dev)
	406	{
	407	struct jz_battery *jz_battery = dev_get_drvdata(dev);
	408
	409	cancel_delayed_work_sync(&jz_battery->work);
	410	jz_battery->status = POWER_SUPPLY_STATUS_UNKNOWN;
	411
	412	return 0;
	413	}
	414
	415	static int jz_battery_resume(struct device *dev)
	416	{
	417	struct jz_battery *jz_battery = dev_get_drvdata(dev);
	418
	419	schedule_delayed_work(&jz_battery->work, 0);
	420
	421	return 0;
	422	}
	423
	424	static const struct dev_pm_ops jz_battery_pm_ops = {
	425	.suspend = jz_battery_suspend,
	426	.resume = jz_battery_resume,
	427	};
	428
	429	#define JZ_BATTERY_PM_OPS (&jz_battery_pm_ops)
	430	#else
	431	#define JZ_BATTERY_PM_OPS NULL
	432	#endif
	433
	434	static struct platform_driver jz_battery_driver = {
	435	.probe = jz_battery_probe,
	436	.remove = __devexit_p(jz_battery_remove),
	437	.driver = {
	438	.name = "jz4740-battery",
	439	.owner = THIS_MODULE,
	440	.pm = JZ_BATTERY_PM_OPS,
	441	},
	442	};
	443
300bac7f	444	module_platform_driver(jz_battery_driver);
f6a21388 LPC	445
	446	MODULE_ALIAS("platform:jz4740-battery");
	447	MODULE_LICENSE("GPL");
	448	MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>");
	449	MODULE_DESCRIPTION("JZ4740 SoC battery driver");