[thirdparty/kernel/stable.git] / drivers / power / lp8727_charger.c

/*
 * Driver for LP8727 Micro/Mini USB IC with integrated charger
 *
 *			Copyright (C) 2011 Texas Instruments
 *			Copyright (C) 2011 National Semiconductor
 *
 * 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/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/platform_data/lp8727.h>

#define DEBOUNCE_MSEC	270

/* Registers */
#define CTRL1		0x1
#define CTRL2		0x2
#define	SWCTRL		0x3
#define INT1		0x4
#define INT2		0x5
#define STATUS1		0x6
#define STATUS2		0x7
#define CHGCTRL2	0x9

/* CTRL1 register */
#define CP_EN		(1 << 0)
#define ADC_EN		(1 << 1)
#define ID200_EN	(1 << 4)

/* CTRL2 register */
#define CHGDET_EN	(1 << 1)
#define INT_EN		(1 << 6)

/* SWCTRL register */
#define SW_DM1_DM	(0x0 << 0)
#define SW_DM1_U1	(0x1 << 0)
#define SW_DM1_HiZ	(0x7 << 0)
#define SW_DP2_DP	(0x0 << 3)
#define SW_DP2_U2	(0x1 << 3)
#define SW_DP2_HiZ	(0x7 << 3)

/* INT1 register */
#define IDNO		(0xF << 0)
#define VBUS		(1 << 4)

/* STATUS1 register */
#define CHGSTAT		(3 << 4)
#define CHPORT		(1 << 6)
#define DCPORT		(1 << 7)

/* STATUS2 register */
#define TEMP_STAT	(3 << 5)

enum lp8727_dev_id {
	ID_NONE,
	ID_TA,
	ID_DEDICATED_CHG,
	ID_USB_CHG,
	ID_USB_DS,
	ID_MAX,
};

enum lp8727_chg_stat {
	PRECHG,
	CC,
	CV,
	EOC,
};

struct lp8727_psy {
	struct power_supply ac;
	struct power_supply usb;
	struct power_supply batt;
};

struct lp8727_chg {
	struct device *dev;
	struct i2c_client *client;
	struct mutex xfer_lock;
	struct delayed_work work;
	struct workqueue_struct *irqthread;
	struct lp8727_platform_data *pdata;
	struct lp8727_psy *psy;
	struct lp8727_chg_param *chg_parm;
	enum lp8727_dev_id devid;
};

static int lp8727_read_bytes(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len)
{
	s32 ret;

	mutex_lock(&pchg->xfer_lock);
	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	mutex_unlock(&pchg->xfer_lock);

	return (ret != len) ? -EIO : 0;
}

static inline int lp8727_read_byte(struct lp8727_chg *pchg, u8 reg, u8 *data)
{
	return lp8727_read_bytes(pchg, reg, data, 1);
}

static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
{
	int ret;

	mutex_lock(&pchg->xfer_lock);
	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
	mutex_unlock(&pchg->xfer_lock);

	return ret;
}

static int lp8727_is_charger_attached(const char *name, int id)
{
	if (name) {
		if (!strcmp(name, "ac"))
			return (id == ID_TA || id == ID_DEDICATED_CHG) ? 1 : 0;
		else if (!strcmp(name, "usb"))
			return (id == ID_USB_CHG) ? 1 : 0;
	}

	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
}

static int lp8727_init_device(struct lp8727_chg *pchg)
{
	u8 val;
	int ret;

	val = ID200_EN | ADC_EN | CP_EN;
	ret = lp8727_write_byte(pchg, CTRL1, val);
	if (ret)
		return ret;

	val = INT_EN | CHGDET_EN;
	ret = lp8727_write_byte(pchg, CTRL2, val);
	if (ret)
		return ret;

	return 0;
}

static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_read_byte(pchg, STATUS1, &val);
	return val & DCPORT;
}

static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_read_byte(pchg, STATUS1, &val);
	return val & CHPORT;
}

static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
{
	lp8727_write_byte(pchg, SWCTRL, sw);
}

static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
{
	u8 devid = ID_NONE;
	u8 swctrl = SW_DM1_HiZ | SW_DP2_HiZ;

	switch (id) {
	case 0x5:
		devid = ID_TA;
		pchg->chg_parm = &pchg->pdata->ac;
		break;
	case 0xB:
		if (lp8727_is_dedicated_charger(pchg)) {
			pchg->chg_parm = &pchg->pdata->ac;
			devid = ID_DEDICATED_CHG;
		} else if (lp8727_is_usb_charger(pchg)) {
			pchg->chg_parm = &pchg->pdata->usb;
			devid = ID_USB_CHG;
			swctrl = SW_DM1_DM | SW_DP2_DP;
		} else if (vbusin) {
			devid = ID_USB_DS;
			swctrl = SW_DM1_DM | SW_DP2_DP;
		}
		break;
	default:
		devid = ID_NONE;
		pchg->chg_parm = NULL;
		break;
	}

	pchg->devid = devid;
	lp8727_ctrl_switch(pchg, swctrl);
}

static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
{
	u8 val;

	lp8727_read_byte(pchg, CTRL2, &val);
	val |= CHGDET_EN;
	lp8727_write_byte(pchg, CTRL2, val);
}

static void lp8727_delayed_func(struct work_struct *_work)
{
	u8 intstat[2], idno, vbus;
	struct lp8727_chg *pchg =
	    container_of(_work, struct lp8727_chg, work.work);

	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
		dev_err(pchg->dev, "can not read INT registers\n");
		return;
	}

	idno = intstat[0] & IDNO;
	vbus = intstat[0] & VBUS;

	lp8727_id_detection(pchg, idno, vbus);
	lp8727_enable_chgdet(pchg);

	power_supply_changed(&pchg->psy->ac);
	power_supply_changed(&pchg->psy->usb);
	power_supply_changed(&pchg->psy->batt);
}

static irqreturn_t lp8727_isr_func(int irq, void *ptr)
{
	struct lp8727_chg *pchg = ptr;
	unsigned long delay = msecs_to_jiffies(DEBOUNCE_MSEC);

	queue_delayed_work(pchg->irqthread, &pchg->work, delay);

	return IRQ_HANDLED;
}

static int lp8727_intr_config(struct lp8727_chg *pchg)
{
	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);

	pchg->irqthread = create_singlethread_workqueue("lp8727-irqthd");
	if (!pchg->irqthread) {
		dev_err(pchg->dev, "can not create thread for lp8727\n");
		return -ENOMEM;
	}

	return request_threaded_irq(pchg->client->irq,
				NULL,
				lp8727_isr_func,
				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
				"lp8727_irq",
				pchg);
}

static enum power_supply_property lp8727_charger_prop[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

static enum power_supply_property lp8727_battery_prop[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_TEMP,
};

static char *battery_supplied_to[] = {
	"main_batt",
};

static int lp8727_charger_get_property(struct power_supply *psy,
				       enum power_supply_property psp,
				       union power_supply_propval *val)
{
	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);

	if (psp == POWER_SUPPLY_PROP_ONLINE)
		val->intval = lp8727_is_charger_attached(psy->name,
							 pchg->devid);

	return 0;
}

static int lp8727_battery_get_property(struct power_supply *psy,
				       enum power_supply_property psp,
				       union power_supply_propval *val)
{
	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	u8 read;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
			lp8727_read_byte(pchg, STATUS1, &read);
			if (((read & CHGSTAT) >> 4) == EOC)
				val->intval = POWER_SUPPLY_STATUS_FULL;
			else
				val->intval = POWER_SUPPLY_STATUS_CHARGING;
		} else {
			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		}
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		lp8727_read_byte(pchg, STATUS2, &read);
		read = (read & TEMP_STAT) >> 5;
		if (read >= 0x1 && read <= 0x3)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		if (pchg->pdata->get_batt_present)
			val->intval = pchg->pdata->get_batt_present();
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		if (pchg->pdata->get_batt_level)
			val->intval = pchg->pdata->get_batt_level();
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		if (pchg->pdata->get_batt_capacity)
			val->intval = pchg->pdata->get_batt_capacity();
		break;
	case POWER_SUPPLY_PROP_TEMP:
		if (pchg->pdata->get_batt_temp)
			val->intval = pchg->pdata->get_batt_temp();
		break;
	default:
		break;
	}

	return 0;
}

static void lp8727_charger_changed(struct power_supply *psy)
{
	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	u8 val;
	u8 eoc_level, ichg;

	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
		if (pchg->chg_parm) {
			eoc_level = pchg->chg_parm->eoc_level;
			ichg = pchg->chg_parm->ichg;
			val = (ichg << 4) | eoc_level;
			lp8727_write_byte(pchg, CHGCTRL2, val);
		}
	}
}

static int lp8727_register_psy(struct lp8727_chg *pchg)
{
	struct lp8727_psy *psy;

	psy = kzalloc(sizeof(*psy), GFP_KERNEL);
	if (!psy)
		return -ENOMEM;

	pchg->psy = psy;

	psy->ac.name = "ac";
	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	psy->ac.properties = lp8727_charger_prop;
	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	psy->ac.get_property = lp8727_charger_get_property;
	psy->ac.supplied_to = battery_supplied_to;
	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);

	if (power_supply_register(pchg->dev, &psy->ac))
		goto err_psy_ac;

	psy->usb.name = "usb";
	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	psy->usb.properties = lp8727_charger_prop;
	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	psy->usb.get_property = lp8727_charger_get_property;
	psy->usb.supplied_to = battery_supplied_to;
	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);

	if (power_supply_register(pchg->dev, &psy->usb))
		goto err_psy_usb;

	psy->batt.name = "main_batt";
	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	psy->batt.properties = lp8727_battery_prop;
	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	psy->batt.get_property = lp8727_battery_get_property;
	psy->batt.external_power_changed = lp8727_charger_changed;

	if (power_supply_register(pchg->dev, &psy->batt))
		goto err_psy_batt;

	return 0;

err_psy_batt:
	power_supply_unregister(&psy->usb);
err_psy_usb:
	power_supply_unregister(&psy->ac);
err_psy_ac:
	kfree(psy);
	return -EPERM;
}

static void lp8727_unregister_psy(struct lp8727_chg *pchg)
{
	struct lp8727_psy *psy = pchg->psy;

	if (!psy)
		return;

	power_supply_unregister(&psy->ac);
	power_supply_unregister(&psy->usb);
	power_supply_unregister(&psy->batt);
	kfree(psy);
}

static int lp8727_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
	struct lp8727_chg *pchg;
	int ret;

	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
		return -EIO;

	pchg = kzalloc(sizeof(*pchg), GFP_KERNEL);
	if (!pchg)
		return -ENOMEM;

	pchg->client = cl;
	pchg->dev = &cl->dev;
	pchg->pdata = cl->dev.platform_data;
	i2c_set_clientdata(cl, pchg);

	mutex_init(&pchg->xfer_lock);

	ret = lp8727_init_device(pchg);
	if (ret) {
		dev_err(pchg->dev, "i2c communication err: %d", ret);
		goto error;
	}

	ret = lp8727_intr_config(pchg);
	if (ret) {
		dev_err(pchg->dev, "irq handler err: %d", ret);
		goto error;
	}

	ret = lp8727_register_psy(pchg);
	if (ret) {
		dev_err(pchg->dev, "power supplies register err: %d", ret);
		goto error;
	}

	return 0;

error:
	kfree(pchg);
	return ret;
}

static int __devexit lp8727_remove(struct i2c_client *cl)
{
	struct lp8727_chg *pchg = i2c_get_clientdata(cl);

	lp8727_unregister_psy(pchg);
	free_irq(pchg->client->irq, pchg);
	flush_workqueue(pchg->irqthread);
	destroy_workqueue(pchg->irqthread);
	kfree(pchg);
	return 0;
}

static const struct i2c_device_id lp8727_ids[] = {
	{"lp8727", 0},
	{ }
};
MODULE_DEVICE_TABLE(i2c, lp8727_ids);

static struct i2c_driver lp8727_driver = {
	.driver = {
		   .name = "lp8727",
		   },
	.probe = lp8727_probe,
	.remove = __devexit_p(lp8727_remove),
	.id_table = lp8727_ids,
};
module_i2c_driver(lp8727_driver);

MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
	      "Daniel Jeong <daniel.jeong@ti.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
2165c8a4	1	/*
f7bae49a	2	* Driver for LP8727 Micro/Mini USB IC with integrated charger
2165c8a4	3	*
e39b828f	4	* Copyright (C) 2011 Texas Instruments
2165c8a4 WK	5	* Copyright (C) 2011 National Semiconductor
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/slab.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/i2c.h>
	17	#include <linux/power_supply.h>
1aebb097	18	#include <linux/platform_data/lp8727.h>
2165c8a4 WK	19
	20	#define DEBOUNCE_MSEC 270
	21
	22	/* Registers */
	23	#define CTRL1 0x1
	24	#define CTRL2 0x2
	25	#define SWCTRL 0x3
	26	#define INT1 0x4
	27	#define INT2 0x5
	28	#define STATUS1 0x6
7336880e	29	#define STATUS2 0x7
2165c8a4 WK	30	#define CHGCTRL2 0x9
	31
	32	/* CTRL1 register */
	33	#define CP_EN (1 << 0)
	34	#define ADC_EN (1 << 1)
	35	#define ID200_EN (1 << 4)
	36
	37	/* CTRL2 register */
	38	#define CHGDET_EN (1 << 1)
	39	#define INT_EN (1 << 6)
	40
	41	/* SWCTRL register */
	42	#define SW_DM1_DM (0x0 << 0)
	43	#define SW_DM1_U1 (0x1 << 0)
	44	#define SW_DM1_HiZ (0x7 << 0)
	45	#define SW_DP2_DP (0x0 << 3)
	46	#define SW_DP2_U2 (0x1 << 3)
	47	#define SW_DP2_HiZ (0x7 << 3)
	48
	49	/* INT1 register */
	50	#define IDNO (0xF << 0)
	51	#define VBUS (1 << 4)
	52
	53	/* STATUS1 register */
	54	#define CHGSTAT (3 << 4)
	55	#define CHPORT (1 << 6)
	56	#define DCPORT (1 << 7)
	57
	58	/* STATUS2 register */
	59	#define TEMP_STAT (3 << 5)
	60
	61	enum lp8727_dev_id {
	62	ID_NONE,
	63	ID_TA,
	64	ID_DEDICATED_CHG,
	65	ID_USB_CHG,
	66	ID_USB_DS,
	67	ID_MAX,
	68	};
	69
	70	enum lp8727_chg_stat {
	71	PRECHG,
	72	CC,
	73	CV,
	74	EOC,
	75	};
	76
	77	struct lp8727_psy {
	78	struct power_supply ac;
	79	struct power_supply usb;
	80	struct power_supply batt;
	81	};
	82
	83	struct lp8727_chg {
	84	struct device *dev;
	85	struct i2c_client *client;
	86	struct mutex xfer_lock;
	87	struct delayed_work work;
	88	struct workqueue_struct *irqthread;
	89	struct lp8727_platform_data *pdata;
	90	struct lp8727_psy *psy;
	91	struct lp8727_chg_param *chg_parm;
	92	enum lp8727_dev_id devid;
	93	};
94
27aefa3b	95	static int lp8727_read_bytes(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	96	{
	97	s32 ret;
	98
	99	mutex_lock(&pchg->xfer_lock);
	100	ret = i2c_smbus_read_i2c_block_data(pchg->client, reg, len, data);
	101	mutex_unlock(&pchg->xfer_lock);
	102
	103	return (ret != len) ? -EIO : 0;
	104	}
	105
27aefa3b	106	static inline int lp8727_read_byte(struct lp8727_chg pchg, u8 reg, u8 data)
2165c8a4	107	{
27aefa3b KM	108	return lp8727_read_bytes(pchg, reg, data, 1);
	109	}
	110
	111	static int lp8727_write_byte(struct lp8727_chg *pchg, u8 reg, u8 data)
	112	{
	113	int ret;
2165c8a4 WK	114
2165c8a4 WK	115	mutex_lock(&pchg->xfer_lock);
27aefa3b	116	ret = i2c_smbus_write_byte_data(pchg->client, reg, data);
2165c8a4 WK	117	mutex_unlock(&pchg->xfer_lock);
	118
	119	return ret;
	120	}
	121
2165c8a4 WK	122	static int lp8727_is_charger_attached(const char *name, int id)
	123	{
	124	if (name) {
	125	if (!strcmp(name, "ac"))
	126	return (id == ID_TA \|\| id == ID_DEDICATED_CHG) ? 1 : 0;
	127	else if (!strcmp(name, "usb"))
	128	return (id == ID_USB_CHG) ? 1 : 0;
	129	}
	130
	131	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
	132	}
	133
7da6334e	134	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	135	{
2165c8a4 WK	136	u8 val;
7da6334e	137	int ret;
2165c8a4 WK	138
2165c8a4 WK	139	val = ID200_EN \| ADC_EN \| CP_EN;
27aefa3b	140	ret = lp8727_write_byte(pchg, CTRL1, val);
7da6334e KM	141	if (ret)
7da6334e KM	142	return ret;
2165c8a4 WK	143
2165c8a4 WK	144	val = INT_EN \| CHGDET_EN;
27aefa3b	145	ret = lp8727_write_byte(pchg, CTRL2, val);
7da6334e KM	146	if (ret)
	147	return ret;
	148
	149	return 0;
2165c8a4 WK	150	}
	151
	152	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	153	{
	154	u8 val;
27aefa3b	155	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	156	return val & DCPORT;
2165c8a4 WK	157	}
	158
	159	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	160	{
	161	u8 val;
27aefa3b	162	lp8727_read_byte(pchg, STATUS1, &val);
7336880e	163	return val & CHPORT;
2165c8a4 WK	164	}
	165
	166	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	167	{
27aefa3b	168	lp8727_write_byte(pchg, SWCTRL, sw);
2165c8a4 WK	169	}
	170
	171	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	172	{
	173	u8 devid = ID_NONE;
	174	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	175
	176	switch (id) {
	177	case 0x5:
	178	devid = ID_TA;
	179	pchg->chg_parm = &pchg->pdata->ac;
	180	break;
	181	case 0xB:
	182	if (lp8727_is_dedicated_charger(pchg)) {
	183	pchg->chg_parm = &pchg->pdata->ac;
	184	devid = ID_DEDICATED_CHG;
	185	} else if (lp8727_is_usb_charger(pchg)) {
	186	pchg->chg_parm = &pchg->pdata->usb;
	187	devid = ID_USB_CHG;
	188	swctrl = SW_DM1_DM \| SW_DP2_DP;
	189	} else if (vbusin) {
	190	devid = ID_USB_DS;
	191	swctrl = SW_DM1_DM \| SW_DP2_DP;
	192	}
	193	break;
	194	default:
	195	devid = ID_NONE;
	196	pchg->chg_parm = NULL;
	197	break;
	198	}
	199
	200	pchg->devid = devid;
	201	lp8727_ctrl_switch(pchg, swctrl);
	202	}
	203
	204	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	205	{
	206	u8 val;
	207
27aefa3b	208	lp8727_read_byte(pchg, CTRL2, &val);
2165c8a4	209	val \|= CHGDET_EN;
27aefa3b	210	lp8727_write_byte(pchg, CTRL2, val);
2165c8a4 WK	211	}
	212
	213	static void lp8727_delayed_func(struct work_struct *_work)
	214	{
	215	u8 intstat[2], idno, vbus;
	216	struct lp8727_chg *pchg =
	217	container_of(_work, struct lp8727_chg, work.work);
	218
27aefa3b	219	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
2165c8a4 WK	220	dev_err(pchg->dev, "can not read INT registers\n");
	221	return;
	222	}
	223
	224	idno = intstat[0] & IDNO;
	225	vbus = intstat[0] & VBUS;
	226
	227	lp8727_id_detection(pchg, idno, vbus);
	228	lp8727_enable_chgdet(pchg);
	229
	230	power_supply_changed(&pchg->psy->ac);
	231	power_supply_changed(&pchg->psy->usb);
	232	power_supply_changed(&pchg->psy->batt);
	233	}
	234
	235	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	236	{
	237	struct lp8727_chg *pchg = ptr;
	238	unsigned long delay = msecs_to_jiffies(DEBOUNCE_MSEC);
	239
	240	queue_delayed_work(pchg->irqthread, &pchg->work, delay);
	241
	242	return IRQ_HANDLED;
	243	}
	244
7da6334e	245	static int lp8727_intr_config(struct lp8727_chg *pchg)
2165c8a4 WK	246	{
	247	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
	248
	249	pchg->irqthread = create_singlethread_workqueue("lp8727-irqthd");
7da6334e	250	if (!pchg->irqthread) {
2165c8a4	251	dev_err(pchg->dev, "can not create thread for lp8727\n");
7da6334e	252	return -ENOMEM;
2165c8a4	253	}
7da6334e KM	254
	255	return request_threaded_irq(pchg->client->irq,
	256	NULL,
	257	lp8727_isr_func,
7c577c0d	258	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
7da6334e KM	259	"lp8727_irq",
7da6334e KM	260	pchg);
2165c8a4 WK	261	}
	262
	263	static enum power_supply_property lp8727_charger_prop[] = {
	264	POWER_SUPPLY_PROP_ONLINE,
	265	};
	266
	267	static enum power_supply_property lp8727_battery_prop[] = {
	268	POWER_SUPPLY_PROP_STATUS,
	269	POWER_SUPPLY_PROP_HEALTH,
	270	POWER_SUPPLY_PROP_PRESENT,
	271	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	272	POWER_SUPPLY_PROP_CAPACITY,
	273	POWER_SUPPLY_PROP_TEMP,
	274	};
	275
	276	static char *battery_supplied_to[] = {
	277	"main_batt",
	278	};
	279
	280	static int lp8727_charger_get_property(struct power_supply *psy,
	281	enum power_supply_property psp,
	282	union power_supply_propval *val)
	283	{
	284	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	285
ce09affc	286	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	287	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	288	pchg->devid);
2165c8a4 WK	289
	290	return 0;
	291	}
	292
	293	static int lp8727_battery_get_property(struct power_supply *psy,
	294	enum power_supply_property psp,
	295	union power_supply_propval *val)
	296	{
	297	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	298	u8 read;
	299
	300	switch (psp) {
	301	case POWER_SUPPLY_PROP_STATUS:
	302	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
27aefa3b	303	lp8727_read_byte(pchg, STATUS1, &read);
2165c8a4 WK	304	if (((read & CHGSTAT) >> 4) == EOC)
	305	val->intval = POWER_SUPPLY_STATUS_FULL;
	306	else
	307	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	308	} else {
	309	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	310	}
	311	break;
	312	case POWER_SUPPLY_PROP_HEALTH:
27aefa3b	313	lp8727_read_byte(pchg, STATUS2, &read);
2165c8a4 WK	314	read = (read & TEMP_STAT) >> 5;
	315	if (read >= 0x1 && read <= 0x3)
	316	val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
	317	else
	318	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	319	break;
	320	case POWER_SUPPLY_PROP_PRESENT:
	321	if (pchg->pdata->get_batt_present)
	322	val->intval = pchg->pdata->get_batt_present();
	323	break;
	324	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	325	if (pchg->pdata->get_batt_level)
	326	val->intval = pchg->pdata->get_batt_level();
	327	break;
	328	case POWER_SUPPLY_PROP_CAPACITY:
	329	if (pchg->pdata->get_batt_capacity)
	330	val->intval = pchg->pdata->get_batt_capacity();
	331	break;
	332	case POWER_SUPPLY_PROP_TEMP:
	333	if (pchg->pdata->get_batt_temp)
	334	val->intval = pchg->pdata->get_batt_temp();
	335	break;
	336	default:
	337	break;
	338	}
	339
	340	return 0;
	341	}
	342
	343	static void lp8727_charger_changed(struct power_supply *psy)
	344	{
	345	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	346	u8 val;
	347	u8 eoc_level, ichg;
	348
	349	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	350	if (pchg->chg_parm) {
	351	eoc_level = pchg->chg_parm->eoc_level;
	352	ichg = pchg->chg_parm->ichg;
	353	val = (ichg << 4) \| eoc_level;
27aefa3b	354	lp8727_write_byte(pchg, CHGCTRL2, val);
2165c8a4 WK	355	}
	356	}
	357	}
	358
	359	static int lp8727_register_psy(struct lp8727_chg *pchg)
	360	{
	361	struct lp8727_psy *psy;
	362
	363	psy = kzalloc(sizeof(*psy), GFP_KERNEL);
	364	if (!psy)
6297b5e5	365	return -ENOMEM;
2165c8a4 WK	366
	367	pchg->psy = psy;
	368
	369	psy->ac.name = "ac";
	370	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	371	psy->ac.properties = lp8727_charger_prop;
	372	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	373	psy->ac.get_property = lp8727_charger_get_property;
	374	psy->ac.supplied_to = battery_supplied_to;
	375	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	376
	377	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	378	goto err_psy_ac;
2165c8a4 WK	379
	380	psy->usb.name = "usb";
	381	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	382	psy->usb.properties = lp8727_charger_prop;
	383	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	384	psy->usb.get_property = lp8727_charger_get_property;
	385	psy->usb.supplied_to = battery_supplied_to;
	386	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	387
	388	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	389	goto err_psy_usb;
2165c8a4 WK	390
	391	psy->batt.name = "main_batt";
	392	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	393	psy->batt.properties = lp8727_battery_prop;
	394	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	395	psy->batt.get_property = lp8727_battery_get_property;
	396	psy->batt.external_power_changed = lp8727_charger_changed;
	397
	398	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	399	goto err_psy_batt;
2165c8a4 WK	400
	401	return 0;
	402
6297b5e5 DN	403	err_psy_batt:
	404	power_supply_unregister(&psy->usb);
	405	err_psy_usb:
	406	power_supply_unregister(&psy->ac);
	407	err_psy_ac:
2165c8a4 WK	408	kfree(psy);
	409	return -EPERM;
	410	}
	411
	412	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	413	{
	414	struct lp8727_psy *psy = pchg->psy;
	415
ce09affc KM	416	if (!psy)
	417	return;
	418
	419	power_supply_unregister(&psy->ac);
	420	power_supply_unregister(&psy->usb);
	421	power_supply_unregister(&psy->batt);
	422	kfree(psy);
2165c8a4 WK	423	}
	424
	425	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	426	{
	427	struct lp8727_chg *pchg;
	428	int ret;
	429
998a8e7a KM	430	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	431	return -EIO;
	432
2165c8a4 WK	433	pchg = kzalloc(sizeof(*pchg), GFP_KERNEL);
	434	if (!pchg)
	435	return -ENOMEM;
	436
	437	pchg->client = cl;
	438	pchg->dev = &cl->dev;
	439	pchg->pdata = cl->dev.platform_data;
	440	i2c_set_clientdata(cl, pchg);
	441
	442	mutex_init(&pchg->xfer_lock);
	443
7da6334e KM	444	ret = lp8727_init_device(pchg);
	445	if (ret) {
	446	dev_err(pchg->dev, "i2c communication err: %d", ret);
	447	goto error;
	448	}
	449
	450	ret = lp8727_intr_config(pchg);
	451	if (ret) {
	452	dev_err(pchg->dev, "irq handler err: %d", ret);
	453	goto error;
	454	}
2165c8a4 WK	455
2165c8a4 WK	456	ret = lp8727_register_psy(pchg);
7da6334e KM	457	if (ret) {
	458	dev_err(pchg->dev, "power supplies register err: %d", ret);
	459	goto error;
	460	}
2165c8a4 WK	461
2165c8a4 WK	462	return 0;
7da6334e KM	463
	464	error:
	465	kfree(pchg);
	466	return ret;
2165c8a4 WK	467	}
	468
	469	static int __devexit lp8727_remove(struct i2c_client *cl)
	470	{
	471	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	472
	473	lp8727_unregister_psy(pchg);
	474	free_irq(pchg->client->irq, pchg);
	475	flush_workqueue(pchg->irqthread);
	476	destroy_workqueue(pchg->irqthread);
	477	kfree(pchg);
	478	return 0;
	479	}
	480
	481	static const struct i2c_device_id lp8727_ids[] = {
	482	{"lp8727", 0},
455a0e2c	483	{ }
2165c8a4	484	};
e2c5f7db	485	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	486
	487	static struct i2c_driver lp8727_driver = {
	488	.driver = {
	489	.name = "lp8727",
	490	},
	491	.probe = lp8727_probe,
	492	.remove = __devexit_p(lp8727_remove),
	493	.id_table = lp8727_ids,
	494	};
5ff92e7a	495	module_i2c_driver(lp8727_driver);
2165c8a4	496
e39b828f	497	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	498	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	499	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	500	MODULE_LICENSE("GPL");