[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 void lp8727_init_device(struct lp8727_chg *pchg)
{
	u8 val;

	val = ID200_EN | ADC_EN | CP_EN;
	if (lp8727_i2c_write_byte(pchg, CTRL1, &val))
		dev_err(pchg->dev, "i2c write err : addr=0x%.2x\n", CTRL1);

	val = INT_EN | CHGDET_EN;
	if (lp8727_i2c_write_byte(pchg, CTRL2, &val))
		dev_err(pchg->dev, "i2c write err : addr=0x%.2x\n", CTRL2);
}

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 void 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");

	if (request_threaded_irq(pchg->client->irq,
				 NULL,
				 lp8727_isr_func,
				 IRQF_TRIGGER_FALLING, "lp8727_irq", pchg)) {
		dev_err(pchg->dev, "lp8727 irq can not be registered\n");
	}
}

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);

	lp8727_init_device(pchg);
	lp8727_intr_config(pchg);

	ret = lp8727_register_psy(pchg);
	if (ret)
		dev_err(pchg->dev,
			"can not register power supplies. err=%d", ret);

	return 0;
}

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