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

/*
 * Driver for LP8727 Micro/Mini USB IC with intergrated 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/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_i2c_read(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 int lp8727_i2c_write(struct lp8727_chg *pchg, u8 reg, u8 *data, u8 len)
{
	s32 ret;

	mutex_lock(&pchg->xfer_lock);
	ret = i2c_smbus_write_i2c_block_data(pchg->client, reg, len, data);
	mutex_unlock(&pchg->xfer_lock);

	return ret;
}

static inline int lp8727_i2c_read_byte(struct lp8727_chg *pchg, u8 reg,
				       u8 *data)
{
	return lp8727_i2c_read(pchg, reg, data, 1);
}

static inline int lp8727_i2c_write_byte(struct lp8727_chg *pchg, u8 reg,
					u8 *data)
{
	return lp8727_i2c_write(pchg, reg, data, 1);
}

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_i2c_write_byte(pchg, CTRL1, &val);
	if (ret)
		return ret;

	val = INT_EN | CHGDET_EN;
	ret = lp8727_i2c_write_byte(pchg, CTRL2, &val);
	if (ret)
		return ret;

	return 0;
}

static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_i2c_read_byte(pchg, STATUS1, &val);
	return (val & DCPORT);
}

static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
{
	u8 val;
	lp8727_i2c_read_byte(pchg, STATUS1, &val);
	return (val & CHPORT);
}

static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
{
	u8 val = sw;
	lp8727_i2c_write_byte(pchg, SWCTRL, &val);
}

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_i2c_read_byte(pchg, CTRL2, &val);
	val |= CHGDET_EN;
	lp8727_i2c_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_i2c_read(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,
				"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_i2c_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_i2c_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_i2c_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)
		goto err_mem;

	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;

	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;

	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;

	return 0;

err_mem:
	return -ENOMEM;
err_psy:
	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},
	{ }
};

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

static int __init lp8727_init(void)
{
	return i2c_add_driver(&lp8727_driver);
}

static void __exit lp8727_exit(void)
{
	i2c_del_driver(&lp8727_driver);
}

module_init(lp8727_init);
module_exit(lp8727_exit);

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 WK	1	/*
	2	* Driver for LP8727 Micro/Mini USB IC with intergrated charger
	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>
	18	#include <linux/lp8727.h>
	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
	29	#define STATUS2 0x7
	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
ce09affc	95	static int lp8727_i2c_read(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
ce09affc	106	static int lp8727_i2c_write(struct lp8727_chg pchg, u8 reg, u8 data, u8 len)
2165c8a4 WK	107	{
	108	s32 ret;
	109
	110	mutex_lock(&pchg->xfer_lock);
	111	ret = i2c_smbus_write_i2c_block_data(pchg->client, reg, len, data);
	112	mutex_unlock(&pchg->xfer_lock);
	113
	114	return ret;
	115	}
	116
	117	static inline int lp8727_i2c_read_byte(struct lp8727_chg *pchg, u8 reg,
ce09affc	118	u8 *data)
2165c8a4 WK	119	{
	120	return lp8727_i2c_read(pchg, reg, data, 1);
	121	}
	122
	123	static inline int lp8727_i2c_write_byte(struct lp8727_chg *pchg, u8 reg,
ce09affc	124	u8 *data)
2165c8a4 WK	125	{
	126	return lp8727_i2c_write(pchg, reg, data, 1);
	127	}
	128
	129	static int lp8727_is_charger_attached(const char *name, int id)
	130	{
	131	if (name) {
	132	if (!strcmp(name, "ac"))
	133	return (id == ID_TA \|\| id == ID_DEDICATED_CHG) ? 1 : 0;
	134	else if (!strcmp(name, "usb"))
	135	return (id == ID_USB_CHG) ? 1 : 0;
	136	}
	137
	138	return (id >= ID_TA && id <= ID_USB_CHG) ? 1 : 0;
	139	}
	140
7da6334e	141	static int lp8727_init_device(struct lp8727_chg *pchg)
2165c8a4 WK	142	{
2165c8a4 WK	143	u8 val;
7da6334e	144	int ret;
2165c8a4 WK	145
2165c8a4 WK	146	val = ID200_EN \| ADC_EN \| CP_EN;
7da6334e KM	147	ret = lp8727_i2c_write_byte(pchg, CTRL1, &val);
	148	if (ret)
	149	return ret;
2165c8a4 WK	150
2165c8a4 WK	151	val = INT_EN \| CHGDET_EN;
7da6334e KM	152	ret = lp8727_i2c_write_byte(pchg, CTRL2, &val);
	153	if (ret)
	154	return ret;
	155
	156	return 0;
2165c8a4 WK	157	}
	158
	159	static int lp8727_is_dedicated_charger(struct lp8727_chg *pchg)
	160	{
	161	u8 val;
ce09affc	162	lp8727_i2c_read_byte(pchg, STATUS1, &val);
2165c8a4 WK	163	return (val & DCPORT);
	164	}
	165
	166	static int lp8727_is_usb_charger(struct lp8727_chg *pchg)
	167	{
	168	u8 val;
ce09affc	169	lp8727_i2c_read_byte(pchg, STATUS1, &val);
2165c8a4 WK	170	return (val & CHPORT);
	171	}
	172
	173	static void lp8727_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
	174	{
	175	u8 val = sw;
ce09affc	176	lp8727_i2c_write_byte(pchg, SWCTRL, &val);
2165c8a4 WK	177	}
	178
	179	static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
	180	{
	181	u8 devid = ID_NONE;
	182	u8 swctrl = SW_DM1_HiZ \| SW_DP2_HiZ;
	183
	184	switch (id) {
	185	case 0x5:
	186	devid = ID_TA;
	187	pchg->chg_parm = &pchg->pdata->ac;
	188	break;
	189	case 0xB:
	190	if (lp8727_is_dedicated_charger(pchg)) {
	191	pchg->chg_parm = &pchg->pdata->ac;
	192	devid = ID_DEDICATED_CHG;
	193	} else if (lp8727_is_usb_charger(pchg)) {
	194	pchg->chg_parm = &pchg->pdata->usb;
	195	devid = ID_USB_CHG;
	196	swctrl = SW_DM1_DM \| SW_DP2_DP;
	197	} else if (vbusin) {
	198	devid = ID_USB_DS;
	199	swctrl = SW_DM1_DM \| SW_DP2_DP;
	200	}
	201	break;
	202	default:
	203	devid = ID_NONE;
	204	pchg->chg_parm = NULL;
	205	break;
	206	}
	207
	208	pchg->devid = devid;
	209	lp8727_ctrl_switch(pchg, swctrl);
	210	}
	211
	212	static void lp8727_enable_chgdet(struct lp8727_chg *pchg)
	213	{
	214	u8 val;
	215
ce09affc	216	lp8727_i2c_read_byte(pchg, CTRL2, &val);
2165c8a4	217	val \|= CHGDET_EN;
ce09affc	218	lp8727_i2c_write_byte(pchg, CTRL2, &val);
2165c8a4 WK	219	}
	220
	221	static void lp8727_delayed_func(struct work_struct *_work)
	222	{
	223	u8 intstat[2], idno, vbus;
	224	struct lp8727_chg *pchg =
	225	container_of(_work, struct lp8727_chg, work.work);
	226
	227	if (lp8727_i2c_read(pchg, INT1, intstat, 2)) {
	228	dev_err(pchg->dev, "can not read INT registers\n");
	229	return;
	230	}
	231
	232	idno = intstat[0] & IDNO;
	233	vbus = intstat[0] & VBUS;
	234
	235	lp8727_id_detection(pchg, idno, vbus);
	236	lp8727_enable_chgdet(pchg);
	237
	238	power_supply_changed(&pchg->psy->ac);
	239	power_supply_changed(&pchg->psy->usb);
	240	power_supply_changed(&pchg->psy->batt);
	241	}
	242
	243	static irqreturn_t lp8727_isr_func(int irq, void *ptr)
	244	{
	245	struct lp8727_chg *pchg = ptr;
	246	unsigned long delay = msecs_to_jiffies(DEBOUNCE_MSEC);
	247
	248	queue_delayed_work(pchg->irqthread, &pchg->work, delay);
	249
	250	return IRQ_HANDLED;
	251	}
	252
7da6334e	253	static int lp8727_intr_config(struct lp8727_chg *pchg)
2165c8a4 WK	254	{
	255	INIT_DELAYED_WORK(&pchg->work, lp8727_delayed_func);
	256
	257	pchg->irqthread = create_singlethread_workqueue("lp8727-irqthd");
7da6334e	258	if (!pchg->irqthread) {
2165c8a4	259	dev_err(pchg->dev, "can not create thread for lp8727\n");
7da6334e	260	return -ENOMEM;
2165c8a4	261	}
7da6334e KM	262
	263	return request_threaded_irq(pchg->client->irq,
	264	NULL,
	265	lp8727_isr_func,
	266	IRQF_TRIGGER_FALLING,
	267	"lp8727_irq",
	268	pchg);
2165c8a4 WK	269	}
	270
	271	static enum power_supply_property lp8727_charger_prop[] = {
	272	POWER_SUPPLY_PROP_ONLINE,
	273	};
	274
	275	static enum power_supply_property lp8727_battery_prop[] = {
	276	POWER_SUPPLY_PROP_STATUS,
	277	POWER_SUPPLY_PROP_HEALTH,
	278	POWER_SUPPLY_PROP_PRESENT,
	279	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	280	POWER_SUPPLY_PROP_CAPACITY,
	281	POWER_SUPPLY_PROP_TEMP,
	282	};
	283
	284	static char *battery_supplied_to[] = {
	285	"main_batt",
	286	};
	287
	288	static int lp8727_charger_get_property(struct power_supply *psy,
	289	enum power_supply_property psp,
	290	union power_supply_propval *val)
	291	{
	292	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	293
ce09affc	294	if (psp == POWER_SUPPLY_PROP_ONLINE)
2165c8a4 WK	295	val->intval = lp8727_is_charger_attached(psy->name,
2165c8a4 WK	296	pchg->devid);
2165c8a4 WK	297
	298	return 0;
	299	}
	300
	301	static int lp8727_battery_get_property(struct power_supply *psy,
	302	enum power_supply_property psp,
	303	union power_supply_propval *val)
	304	{
	305	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	306	u8 read;
	307
	308	switch (psp) {
	309	case POWER_SUPPLY_PROP_STATUS:
	310	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
ce09affc	311	lp8727_i2c_read_byte(pchg, STATUS1, &read);
2165c8a4 WK	312	if (((read & CHGSTAT) >> 4) == EOC)
	313	val->intval = POWER_SUPPLY_STATUS_FULL;
	314	else
	315	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	316	} else {
	317	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	318	}
	319	break;
	320	case POWER_SUPPLY_PROP_HEALTH:
ce09affc	321	lp8727_i2c_read_byte(pchg, STATUS2, &read);
2165c8a4 WK	322	read = (read & TEMP_STAT) >> 5;
	323	if (read >= 0x1 && read <= 0x3)
	324	val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
	325	else
	326	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	327	break;
	328	case POWER_SUPPLY_PROP_PRESENT:
	329	if (pchg->pdata->get_batt_present)
	330	val->intval = pchg->pdata->get_batt_present();
	331	break;
	332	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	333	if (pchg->pdata->get_batt_level)
	334	val->intval = pchg->pdata->get_batt_level();
	335	break;
	336	case POWER_SUPPLY_PROP_CAPACITY:
	337	if (pchg->pdata->get_batt_capacity)
	338	val->intval = pchg->pdata->get_batt_capacity();
	339	break;
	340	case POWER_SUPPLY_PROP_TEMP:
	341	if (pchg->pdata->get_batt_temp)
	342	val->intval = pchg->pdata->get_batt_temp();
	343	break;
	344	default:
	345	break;
	346	}
	347
	348	return 0;
	349	}
	350
	351	static void lp8727_charger_changed(struct power_supply *psy)
	352	{
	353	struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
	354	u8 val;
	355	u8 eoc_level, ichg;
	356
	357	if (lp8727_is_charger_attached(psy->name, pchg->devid)) {
	358	if (pchg->chg_parm) {
	359	eoc_level = pchg->chg_parm->eoc_level;
	360	ichg = pchg->chg_parm->ichg;
	361	val = (ichg << 4) \| eoc_level;
ce09affc	362	lp8727_i2c_write_byte(pchg, CHGCTRL2, &val);
2165c8a4 WK	363	}
	364	}
	365	}
	366
	367	static int lp8727_register_psy(struct lp8727_chg *pchg)
	368	{
	369	struct lp8727_psy *psy;
	370
	371	psy = kzalloc(sizeof(*psy), GFP_KERNEL);
	372	if (!psy)
	373	goto err_mem;
	374
	375	pchg->psy = psy;
	376
	377	psy->ac.name = "ac";
	378	psy->ac.type = POWER_SUPPLY_TYPE_MAINS;
	379	psy->ac.properties = lp8727_charger_prop;
	380	psy->ac.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	381	psy->ac.get_property = lp8727_charger_get_property;
	382	psy->ac.supplied_to = battery_supplied_to;
	383	psy->ac.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	384
	385	if (power_supply_register(pchg->dev, &psy->ac))
	386	goto err_psy;
	387
	388	psy->usb.name = "usb";
	389	psy->usb.type = POWER_SUPPLY_TYPE_USB;
	390	psy->usb.properties = lp8727_charger_prop;
	391	psy->usb.num_properties = ARRAY_SIZE(lp8727_charger_prop);
	392	psy->usb.get_property = lp8727_charger_get_property;
	393	psy->usb.supplied_to = battery_supplied_to;
	394	psy->usb.num_supplicants = ARRAY_SIZE(battery_supplied_to);
	395
	396	if (power_supply_register(pchg->dev, &psy->usb))
	397	goto err_psy;
	398
	399	psy->batt.name = "main_batt";
	400	psy->batt.type = POWER_SUPPLY_TYPE_BATTERY;
	401	psy->batt.properties = lp8727_battery_prop;
	402	psy->batt.num_properties = ARRAY_SIZE(lp8727_battery_prop);
	403	psy->batt.get_property = lp8727_battery_get_property;
	404	psy->batt.external_power_changed = lp8727_charger_changed;
	405
	406	if (power_supply_register(pchg->dev, &psy->batt))
	407	goto err_psy;
	408
	409	return 0;
	410
	411	err_mem:
	412	return -ENOMEM;
	413	err_psy:
	414	kfree(psy);
	415	return -EPERM;
	416	}
	417
	418	static void lp8727_unregister_psy(struct lp8727_chg *pchg)
	419	{
	420	struct lp8727_psy *psy = pchg->psy;
	421
ce09affc KM	422	if (!psy)
	423	return;
	424
	425	power_supply_unregister(&psy->ac);
	426	power_supply_unregister(&psy->usb);
	427	power_supply_unregister(&psy->batt);
	428	kfree(psy);
2165c8a4 WK	429	}
	430
	431	static int lp8727_probe(struct i2c_client cl, const struct i2c_device_id id)
	432	{
	433	struct lp8727_chg *pchg;
	434	int ret;
	435
998a8e7a KM	436	if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
	437	return -EIO;
	438
2165c8a4 WK	439	pchg = kzalloc(sizeof(*pchg), GFP_KERNEL);
	440	if (!pchg)
	441	return -ENOMEM;
	442
	443	pchg->client = cl;
	444	pchg->dev = &cl->dev;
	445	pchg->pdata = cl->dev.platform_data;
	446	i2c_set_clientdata(cl, pchg);
	447
	448	mutex_init(&pchg->xfer_lock);
	449
7da6334e KM	450	ret = lp8727_init_device(pchg);
	451	if (ret) {
	452	dev_err(pchg->dev, "i2c communication err: %d", ret);
	453	goto error;
	454	}
	455
	456	ret = lp8727_intr_config(pchg);
	457	if (ret) {
	458	dev_err(pchg->dev, "irq handler err: %d", ret);
	459	goto error;
	460	}
2165c8a4 WK	461
2165c8a4 WK	462	ret = lp8727_register_psy(pchg);
7da6334e KM	463	if (ret) {
	464	dev_err(pchg->dev, "power supplies register err: %d", ret);
	465	goto error;
	466	}
2165c8a4 WK	467
2165c8a4 WK	468	return 0;
7da6334e KM	469
	470	error:
	471	kfree(pchg);
	472	return ret;
2165c8a4 WK	473	}
	474
	475	static int __devexit lp8727_remove(struct i2c_client *cl)
	476	{
	477	struct lp8727_chg *pchg = i2c_get_clientdata(cl);
	478
	479	lp8727_unregister_psy(pchg);
	480	free_irq(pchg->client->irq, pchg);
	481	flush_workqueue(pchg->irqthread);
	482	destroy_workqueue(pchg->irqthread);
	483	kfree(pchg);
	484	return 0;
	485	}
	486
	487	static const struct i2c_device_id lp8727_ids[] = {
	488	{"lp8727", 0},
455a0e2c	489	{ }
2165c8a4 WK	490	};
	491
	492	static struct i2c_driver lp8727_driver = {
	493	.driver = {
	494	.name = "lp8727",
	495	},
	496	.probe = lp8727_probe,
	497	.remove = __devexit_p(lp8727_remove),
	498	.id_table = lp8727_ids,
	499	};
	500
	501	static int __init lp8727_init(void)
	502	{
	503	return i2c_add_driver(&lp8727_driver);
	504	}
	505
ce09affc	506	static void __exit lp8727_exit(void)
2165c8a4 WK	507	{
	508	i2c_del_driver(&lp8727_driver);
	509	}
	510
	511	module_init(lp8727_init);
ce09affc	512	module_exit(lp8727_exit);
2165c8a4	513
e39b828f	514	MODULE_DESCRIPTION("TI/National Semiconductor LP8727 charger driver");
ce09affc KM	515	MODULE_AUTHOR
ce09affc KM	516	("Woogyom Kim <milo.kim@ti.com>, Daniel Jeong <daniel.jeong@ti.com>");
2165c8a4	517	MODULE_LICENSE("GPL");