[linux-2.6-block.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 DEFAULT_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 lp8727_platform_data *pdata;
	struct lp8727_psy *psy;
	struct lp8727_chg_param *chg_parm;
	enum lp8727_dev_id devid;
	unsigned long debounce_jiffies;
};

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)
{
	struct lp8727_platform_data *pdata = pchg->pdata;
	u8 devid = ID_NONE;
	u8 swctrl = SW_DM1_HiZ | SW_DP2_HiZ;

	switch (id) {
	case 0x5:
		devid = ID_TA;
		pchg->chg_parm = pdata ? pdata->ac : NULL;
		break;
	case 0xB:
		if (lp8727_is_dedicated_charger(pchg)) {
			pchg->chg_parm = pdata ? pdata->ac : NULL;
			devid = ID_DEDICATED_CHG;
		} else if (lp8727_is_usb_charger(pchg)) {
			pchg->chg_parm = pdata ? pdata->usb : NULL;
			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;

	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
	return IRQ_HANDLED;
}

static int lp8727_intr_config(struct lp8727_chg *pchg)
{
	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
						DEFAULT_DEBOUNCE_MSEC;

	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);

	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);

	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);
	struct lp8727_platform_data *pdata = pchg->pdata;
	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 (!pdata)
			return -EINVAL;

		if (pdata->get_batt_present)
			val->intval = pchg->pdata->get_batt_present();
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		if (!pdata)
			return -EINVAL;

		if (pdata->get_batt_level)
			val->intval = pchg->pdata->get_batt_level();
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		if (!pdata)
			return -EINVAL;

		if (pdata->get_batt_capacity)
			val->intval = pchg->pdata->get_batt_capacity();
		break;
	case POWER_SUPPLY_PROP_TEMP:
		if (!pdata)
			return -EINVAL;

		if (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 = devm_kzalloc(pchg->dev, 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:
	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);
}

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 = devm_kzalloc(&cl->dev, 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);
		return ret;
	}

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

	ret = lp8727_intr_config(pchg);
	if (ret) {
		dev_err(pchg->dev, "irq handler err: %d", ret);
		lp8727_unregister_psy(pchg);
		return ret;
	}

	return 0;
}

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

	free_irq(pchg->client->irq, pchg);
	lp8727_unregister_psy(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	19
60fd57e0	20	#define DEFAULT_DEBOUNCE_MSEC 270
2165c8a4 WK	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;
2165c8a4 WK	88	struct lp8727_platform_data *pdata;
	89	struct lp8727_psy *psy;
	90	struct lp8727_chg_param *chg_parm;
	91	enum lp8727_dev_id devid;
60fd57e0	92	unsigned long debounce_jiffies;
2165c8a4 WK	93	};
2165c8a4 WK	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	{
318cb389	173	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	174	u8 devid = ID_NONE;
	175	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	176
	177	switch (id) {
	178	case 0x5:
	179	devid = ID_TA;
318cb389	180	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	181	break;
	182	case 0xB:
	183	if (lp8727_is_dedicated_charger(pchg)) {
318cb389	184	pchg->chg_parm = pdata ? pdata->ac : NULL;
2165c8a4 WK	185	devid = ID_DEDICATED_CHG;
2165c8a4 WK	186	} else if (lp8727_is_usb_charger(pchg)) {
318cb389	187	pchg->chg_parm = pdata ? pdata->usb : NULL;
2165c8a4 WK	188	devid = ID_USB_CHG;
	189	swctrl = SW_DM1_DM \| SW_DP2_DP;
	190	} else if (vbusin) {
	191	devid = ID_USB_DS;
	192	swctrl = SW_DM1_DM \| SW_DP2_DP;
	193	}
	194	break;
	195	default:
	196	devid = ID_NONE;
	197	pchg->chg_parm = NULL;
	198	break;
	199	}
	200
	201	pchg->devid = devid;
	202	lp8727_ctrl_switch(pchg, swctrl);
	203	}
	204
	205	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	206	{
	207	u8 val;
	208
27aefa3b	209	lp8727_read_byte(pchg, CTRL2, &val);
2165c8a4	210	val \|= CHGDET_EN;
27aefa3b	211	lp8727_write_byte(pchg, CTRL2, val);
2165c8a4 WK	212	}
	213
	214	static void lp8727_delayed_func(struct work_struct *_work)
	215	{
	216	u8 intstat[2], idno, vbus;
	217	struct lp8727_chg *pchg =
	218	container_of(_work, struct lp8727_chg, work.work);
	219
27aefa3b	220	if (lp8727_read_bytes(pchg, INT1, intstat, 2)) {
2165c8a4 WK	221	dev_err(pchg->dev, "can not read INT registers\n");
	222	return;
	223	}
	224
	225	idno = intstat[0] & IDNO;
	226	vbus = intstat[0] & VBUS;
	227
	228	lp8727_id_detection(pchg, idno, vbus);
	229	lp8727_enable_chgdet(pchg);
	230
	231	power_supply_changed(&pchg->psy->ac);
	232	power_supply_changed(&pchg->psy->usb);
	233	power_supply_changed(&pchg->psy->batt);
	234	}
	235
	236	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	237	{
	238	struct lp8727_chg *pchg = ptr;
2165c8a4	239
2a092582	240	schedule_delayed_work(&pchg->work, pchg->debounce_jiffies);
2165c8a4 WK	241	return IRQ_HANDLED;
	242	}
	243
7da6334e	244	static int lp8727_intr_config(struct lp8727_chg *pchg)
2165c8a4	245	{
60fd57e0 KM	246	unsigned delay_msec = pchg->pdata ? pchg->pdata->debounce_msec :
	247	DEFAULT_DEBOUNCE_MSEC;
	248
2165c8a4 WK	249	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
2165c8a4 WK	250
60fd57e0 KM	251	pchg->debounce_jiffies = msecs_to_jiffies(delay_msec);
60fd57e0 KM	252
7da6334e KM	253	return request_threaded_irq(pchg->client->irq,
	254	NULL,
	255	lp8727_isr_func,
7c577c0d	256	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
7da6334e KM	257	"lp8727_irq",
7da6334e KM	258	pchg);
2165c8a4 WK	259	}
	260
	261	static enum power_supply_property lp8727_charger_prop[] = {
	262	POWER_SUPPLY_PROP_ONLINE,
	263	};
	264
	265	static enum power_supply_property lp8727_battery_prop[] = {
	266	POWER_SUPPLY_PROP_STATUS,
	267	POWER_SUPPLY_PROP_HEALTH,
	268	POWER_SUPPLY_PROP_PRESENT,
	269	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	270	POWER_SUPPLY_PROP_CAPACITY,
	271	POWER_SUPPLY_PROP_TEMP,
	272	};
	273
	274	static char *battery_supplied_to[] = {
	275	"main_batt",
	276	};
	277
	278	static int lp8727_charger_get_property(struct power_supply *psy,
	279	enum power_supply_property psp,
	280	union power_supply_propval *val)
	281	{
	282	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	283
ce09affc	284	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	285	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	286	pchg->devid);
2165c8a4 WK	287
	288	return 0;
	289	}
	290
	291	static int lp8727_battery_get_property(struct power_supply *psy,
	292	enum power_supply_property psp,
	293	union power_supply_propval *val)
	294	{
	295	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
318cb389	296	struct lp8727_platform_data *pdata = pchg->pdata;
2165c8a4 WK	297	u8 read;
	298
	299	switch (psp) {
	300	case POWER_SUPPLY_PROP_STATUS:
	301	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
27aefa3b	302	lp8727_read_byte(pchg, STATUS1, &read);
2165c8a4 WK	303	if (((read & CHGSTAT) >> 4) == EOC)
	304	val->intval = POWER_SUPPLY_STATUS_FULL;
	305	else
	306	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	307	} else {
	308	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	309	}
	310	break;
	311	case POWER_SUPPLY_PROP_HEALTH:
27aefa3b	312	lp8727_read_byte(pchg, STATUS2, &read);
2165c8a4 WK	313	read = (read & TEMP_STAT) >> 5;
	314	if (read >= 0x1 && read <= 0x3)
	315	val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
	316	else
	317	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	318	break;
	319	case POWER_SUPPLY_PROP_PRESENT:
318cb389 KM	320	if (!pdata)
	321	return -EINVAL;
	322
	323	if (pdata->get_batt_present)
2165c8a4 WK	324	val->intval = pchg->pdata->get_batt_present();
	325	break;
	326	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
318cb389 KM	327	if (!pdata)
	328	return -EINVAL;
	329
	330	if (pdata->get_batt_level)
2165c8a4 WK	331	val->intval = pchg->pdata->get_batt_level();
	332	break;
	333	case POWER_SUPPLY_PROP_CAPACITY:
318cb389 KM	334	if (!pdata)
	335	return -EINVAL;
	336
	337	if (pdata->get_batt_capacity)
2165c8a4 WK	338	val->intval = pchg->pdata->get_batt_capacity();
	339	break;
	340	case POWER_SUPPLY_PROP_TEMP:
318cb389 KM	341	if (!pdata)
	342	return -EINVAL;
	343
	344	if (pdata->get_batt_temp)
2165c8a4 WK	345	val->intval = pchg->pdata->get_batt_temp();
	346	break;
	347	default:
	348	break;
	349	}
	350
	351	return 0;
	352	}
	353
	354	static void lp8727_charger_changed(struct power_supply *psy)
	355	{
	356	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	357	u8 val;
	358	u8 eoc_level, ichg;
	359
	360	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	361	if (pchg->chg_parm) {
	362	eoc_level = pchg->chg_parm->eoc_level;
	363	ichg = pchg->chg_parm->ichg;
	364	val = (ichg << 4) \| eoc_level;
27aefa3b	365	lp8727_write_byte(pchg, CHGCTRL2, val);
2165c8a4 WK	366	}
	367	}
	368	}
	369
	370	static int lp8727_register_psy(struct lp8727_chg *pchg)
	371	{
	372	struct lp8727_psy *psy;
	373
74727c57	374	psy = devm_kzalloc(pchg->dev, sizeof(*psy), GFP_KERNEL);
2165c8a4	375	if (!psy)
6297b5e5	376	return -ENOMEM;
2165c8a4 WK	377
	378	pchg->psy = psy;
	379
	380	psy->ac.name = "ac";
	381	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	382	psy->ac.properties = lp8727_charger_prop;
	383	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	384	psy->ac.get_property = lp8727_charger_get_property;
	385	psy->ac.supplied_to = battery_supplied_to;
	386	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	387
	388	if (power_supply_register(pchg->dev, &psy->ac))
6297b5e5	389	goto err_psy_ac;
2165c8a4 WK	390
	391	psy->usb.name = "usb";
	392	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	393	psy->usb.properties = lp8727_charger_prop;
	394	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	395	psy->usb.get_property = lp8727_charger_get_property;
	396	psy->usb.supplied_to = battery_supplied_to;
	397	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	398
	399	if (power_supply_register(pchg->dev, &psy->usb))
6297b5e5	400	goto err_psy_usb;
2165c8a4 WK	401
	402	psy->batt.name = "main_batt";
	403	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	404	psy->batt.properties = lp8727_battery_prop;
	405	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	406	psy->batt.get_property = lp8727_battery_get_property;
	407	psy->batt.external_power_changed = lp8727_charger_changed;
	408
	409	if (power_supply_register(pchg->dev, &psy->batt))
6297b5e5	410	goto err_psy_batt;
2165c8a4 WK	411
	412	return 0;
	413
6297b5e5 DN	414	err_psy_batt:
	415	power_supply_unregister(&psy->usb);
	416	err_psy_usb:
	417	power_supply_unregister(&psy->ac);
	418	err_psy_ac:
2165c8a4 WK	419	return -EPERM;
	420	}
	421
	422	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	423	{
	424	struct lp8727_psy *psy = pchg->psy;
	425
ce09affc KM	426	if (!psy)
	427	return;
	428
	429	power_supply_unregister(&psy->ac);
	430	power_supply_unregister(&psy->usb);
	431	power_supply_unregister(&psy->batt);
2165c8a4 WK	432	}
	433
	434	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	435	{
	436	struct lp8727_chg *pchg;
	437	int ret;
	438
998a8e7a KM	439	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	440	return -EIO;
	441
74727c57	442	pchg = devm_kzalloc(&cl->dev, sizeof(*pchg), GFP_KERNEL);
2165c8a4 WK	443	if (!pchg)
	444	return -ENOMEM;
	445
	446	pchg->client = cl;
	447	pchg->dev = &cl->dev;
	448	pchg->pdata = cl->dev.platform_data;
	449	i2c_set_clientdata(cl, pchg);
	450
	451	mutex_init(&pchg->xfer_lock);
	452
7da6334e KM	453	ret = lp8727_init_device(pchg);
	454	if (ret) {
	455	dev_err(pchg->dev, "i2c communication err: %d", ret);
fb9adc51	456	return ret;
7da6334e KM	457	}
7da6334e KM	458
fb9adc51	459	ret = lp8727_register_psy(pchg);
7da6334e	460	if (ret) {
fb9adc51 KM	461	dev_err(pchg->dev, "power supplies register err: %d", ret);
fb9adc51 KM	462	return ret;
7da6334e	463	}
2165c8a4	464
fb9adc51	465	ret = lp8727_intr_config(pchg);
7da6334e	466	if (ret) {
fb9adc51 KM	467	dev_err(pchg->dev, "irq handler err: %d", ret);
	468	lp8727_unregister_psy(pchg);
	469	return ret;
7da6334e	470	}
2165c8a4 WK	471
	472	return 0;
	473	}
	474
	475	static int __devexit lp8727_remove(struct i2c_client *cl)
	476	{
	477	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	478
2165c8a4	479	free_irq(pchg->client->irq, pchg);
fb9adc51	480	lp8727_unregister_psy(pchg);
2165c8a4 WK	481	return 0;
	482	}
	483
	484	static const struct i2c_device_id lp8727_ids[] = {
	485	{"lp8727", 0},
455a0e2c	486	{ }
2165c8a4	487	};
e2c5f7db	488	MODULE_DEVICE_TABLE(i2c, lp8727_ids);
2165c8a4 WK	489
	490	static struct i2c_driver lp8727_driver = {
	491	.driver = {
	492	.name = "lp8727",
	493	},
	494	.probe = lp8727_probe,
	495	.remove = __devexit_p(lp8727_remove),
	496	.id_table = lp8727_ids,
	497	};
5ff92e7a	498	module_i2c_driver(lp8727_driver);
2165c8a4	499
e39b828f	500	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
7336880e KM	501	MODULE_AUTHOR("Woogyom Kim <milo.kim@ti.com>, "
7336880e KM	502	"Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	503	MODULE_LICENSE("GPL");