// SPDX-License-Identifier: GPL-2.0
// BQ256XX Battery Charger Driver
// Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/types.h>
#include <linux/usb/phy.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/acpi.h>

#define BQ256XX_MANUFACTURER "Texas Instruments"

#define BQ256XX_INPUT_CURRENT_LIMIT		0x00
#define BQ256XX_CHARGER_CONTROL_0		0x01
#define BQ256XX_CHARGE_CURRENT_LIMIT		0x02
#define BQ256XX_PRECHG_AND_TERM_CURR_LIM	0x03
#define BQ256XX_BATTERY_VOLTAGE_LIMIT		0x04
#define BQ256XX_CHARGER_CONTROL_1		0x05
#define BQ256XX_CHARGER_CONTROL_2		0x06
#define BQ256XX_CHARGER_CONTROL_3		0x07
#define BQ256XX_CHARGER_STATUS_0		0x08
#define BQ256XX_CHARGER_STATUS_1		0x09
#define BQ256XX_CHARGER_STATUS_2		0x0a
#define BQ256XX_PART_INFORMATION		0x0b
#define BQ256XX_CHARGER_CONTROL_4		0x0c

#define BQ256XX_IINDPM_MASK		GENMASK(4, 0)
#define BQ256XX_IINDPM_STEP_uA		100000
#define BQ256XX_IINDPM_OFFSET_uA	100000
#define BQ256XX_IINDPM_MIN_uA		100000
#define BQ256XX_IINDPM_MAX_uA		3200000
#define BQ256XX_IINDPM_DEF_uA		2400000

#define BQ256XX_VINDPM_MASK		GENMASK(3, 0)
#define BQ256XX_VINDPM_STEP_uV		100000
#define BQ256XX_VINDPM_OFFSET_uV	3900000
#define BQ256XX_VINDPM_MIN_uV		3900000
#define BQ256XX_VINDPM_MAX_uV		5400000
#define BQ256XX_VINDPM_DEF_uV		4500000

#define BQ256XX_VBATREG_MASK		GENMASK(7, 3)
#define BQ2560X_VBATREG_STEP_uV		32000
#define BQ2560X_VBATREG_OFFSET_uV	3856000
#define BQ2560X_VBATREG_MIN_uV		3856000
#define BQ2560X_VBATREG_MAX_uV		4624000
#define BQ2560X_VBATREG_DEF_uV		4208000
#define BQ25601D_VBATREG_OFFSET_uV	3847000
#define BQ25601D_VBATREG_MIN_uV		3847000
#define BQ25601D_VBATREG_MAX_uV		4615000
#define BQ25601D_VBATREG_DEF_uV		4199000
#define BQ2561X_VBATREG_STEP_uV		10000
#define BQ25611D_VBATREG_MIN_uV		3494000
#define BQ25611D_VBATREG_MAX_uV		4510000
#define BQ25611D_VBATREG_DEF_uV		4190000
#define BQ25618_VBATREG_MIN_uV		3504000
#define BQ25618_VBATREG_MAX_uV		4500000
#define BQ25618_VBATREG_DEF_uV		4200000
#define BQ256XX_VBATREG_BIT_SHIFT	3
#define BQ2561X_VBATREG_THRESH		0x8
#define BQ25611D_VBATREG_THRESH_uV	4290000
#define BQ25618_VBATREG_THRESH_uV	4300000

#define BQ256XX_ITERM_MASK		GENMASK(3, 0)
#define BQ256XX_ITERM_STEP_uA		60000
#define BQ256XX_ITERM_OFFSET_uA		60000
#define BQ256XX_ITERM_MIN_uA		60000
#define BQ256XX_ITERM_MAX_uA		780000
#define BQ256XX_ITERM_DEF_uA		180000
#define BQ25618_ITERM_STEP_uA		20000
#define BQ25618_ITERM_OFFSET_uA		20000
#define BQ25618_ITERM_MIN_uA		20000
#define BQ25618_ITERM_MAX_uA		260000
#define BQ25618_ITERM_DEF_uA		60000

#define BQ256XX_IPRECHG_MASK		GENMASK(7, 4)
#define BQ256XX_IPRECHG_STEP_uA		60000
#define BQ256XX_IPRECHG_OFFSET_uA	60000
#define BQ256XX_IPRECHG_MIN_uA		60000
#define BQ256XX_IPRECHG_MAX_uA		780000
#define BQ256XX_IPRECHG_DEF_uA		180000
#define BQ25618_IPRECHG_STEP_uA		20000
#define BQ25618_IPRECHG_OFFSET_uA	20000
#define BQ25618_IPRECHG_MIN_uA		20000
#define BQ25618_IPRECHG_MAX_uA		260000
#define BQ25618_IPRECHG_DEF_uA		40000
#define BQ256XX_IPRECHG_BIT_SHIFT	4

#define BQ256XX_ICHG_MASK		GENMASK(5, 0)
#define BQ256XX_ICHG_STEP_uA		60000
#define BQ256XX_ICHG_MIN_uA		0
#define BQ256XX_ICHG_MAX_uA		3000000
#define BQ2560X_ICHG_DEF_uA		2040000
#define BQ25611D_ICHG_DEF_uA		1020000
#define BQ25618_ICHG_STEP_uA		20000
#define BQ25618_ICHG_MIN_uA		0
#define BQ25618_ICHG_MAX_uA		1500000
#define BQ25618_ICHG_DEF_uA		340000
#define BQ25618_ICHG_THRESH		0x3c
#define BQ25618_ICHG_THRESH_uA		1180000

#define BQ256XX_VBUS_STAT_MASK		GENMASK(7, 5)
#define BQ256XX_VBUS_STAT_NO_INPUT	0
#define BQ256XX_VBUS_STAT_USB_SDP	BIT(5)
#define BQ256XX_VBUS_STAT_USB_CDP	BIT(6)
#define BQ256XX_VBUS_STAT_USB_DCP	(BIT(6) | BIT(5))
#define BQ256XX_VBUS_STAT_USB_OTG	(BIT(7) | BIT(6) | BIT(5))

#define BQ256XX_CHRG_STAT_MASK		GENMASK(4, 3)
#define BQ256XX_CHRG_STAT_NOT_CHRGING	0
#define BQ256XX_CHRG_STAT_PRECHRGING	BIT(3)
#define BQ256XX_CHRG_STAT_FAST_CHRGING	BIT(4)
#define BQ256XX_CHRG_STAT_CHRG_TERM	(BIT(4) | BIT(3))

#define BQ256XX_PG_STAT_MASK		BIT(2)
#define BQ256XX_WDT_FAULT_MASK		BIT(7)
#define BQ256XX_CHRG_FAULT_MASK		GENMASK(5, 4)
#define BQ256XX_CHRG_FAULT_NORMAL	0
#define BQ256XX_CHRG_FAULT_INPUT	BIT(4)
#define BQ256XX_CHRG_FAULT_THERM	BIT(5)
#define BQ256XX_CHRG_FAULT_CST_EXPIRE	(BIT(5) | BIT(4))
#define BQ256XX_BAT_FAULT_MASK		BIT(3)
#define BQ256XX_NTC_FAULT_MASK		GENMASK(2, 0)
#define BQ256XX_NTC_FAULT_WARM		BIT(1)
#define BQ256XX_NTC_FAULT_COOL		(BIT(1) | BIT(0))
#define BQ256XX_NTC_FAULT_COLD		(BIT(2) | BIT(0))
#define BQ256XX_NTC_FAULT_HOT		(BIT(2) | BIT(1))

#define BQ256XX_NUM_WD_VAL	4
#define BQ256XX_WATCHDOG_MASK	GENMASK(5, 4)
#define BQ256XX_WATCHDOG_MAX	1600000
#define BQ256XX_WATCHDOG_DIS	0
#define BQ256XX_WDT_BIT_SHIFT	4

#define BQ256XX_REG_RST		BIT(7)

/**
 * struct bq256xx_init_data -
 * @ichg: fast charge current
 * @iindpm: input current limit
 * @vbatreg: charge voltage
 * @iterm: termination current
 * @iprechg: precharge current
 * @vindpm: input voltage limit
 * @ichg_max: maximum fast charge current
 * @vbatreg_max: maximum charge voltage
 */
struct bq256xx_init_data {
	u32 ichg;
	u32 iindpm;
	u32 vbatreg;
	u32 iterm;
	u32 iprechg;
	u32 vindpm;
	u32 ichg_max;
	u32 vbatreg_max;
};

/**
 * struct bq256xx_state -
 * @vbus_stat: VBUS status according to BQ256XX_CHARGER_STATUS_0
 * @chrg_stat: charging status according to BQ256XX_CHARGER_STATUS_0
 * @online: PG status according to BQ256XX_CHARGER_STATUS_0
 *
 * @wdt_fault: watchdog fault according to BQ256XX_CHARGER_STATUS_1
 * @bat_fault: battery fault according to BQ256XX_CHARGER_STATUS_1
 * @chrg_fault: charging fault according to BQ256XX_CHARGER_STATUS_1
 * @ntc_fault: TS fault according to BQ256XX_CHARGER_STATUS_1
 */
struct bq256xx_state {
	u8 vbus_stat;
	u8 chrg_stat;
	bool online;

	u8 wdt_fault;
	u8 bat_fault;
	u8 chrg_fault;
	u8 ntc_fault;
};

enum bq256xx_id {
	BQ25600,
	BQ25600D,
	BQ25601,
	BQ25601D,
	BQ25618,
	BQ25619,
	BQ25611D,
};

/**
 * struct bq256xx_device -
 * @client: i2c client structure
 * @regmap: register map structure
 * @dev: device structure
 * @charger: power supply registered for the charger
 * @battery: power supply registered for the battery
 * @lock: mutex lock structure
 *
 * @usb2_phy: usb_phy identifier
 * @usb3_phy: usb_phy identifier
 * @usb_nb: notifier block
 * @usb_work: usb work queue
 * @usb_event: usb_event code
 *
 * @model_name: i2c name string
 *
 * @init_data: initialization data
 * @chip_info: device variant information
 * @state: device status and faults
 * @watchdog_timer: watchdog timer value in milliseconds
 */
struct bq256xx_device {
	struct i2c_client *client;
	struct device *dev;
	struct power_supply *charger;
	struct power_supply *battery;
	struct mutex lock;
	struct regmap *regmap;

	struct usb_phy *usb2_phy;
	struct usb_phy *usb3_phy;
	struct notifier_block usb_nb;
	struct work_struct usb_work;
	unsigned long usb_event;

	char model_name[I2C_NAME_SIZE];

	struct bq256xx_init_data init_data;
	const struct bq256xx_chip_info *chip_info;
	struct bq256xx_state state;
	int watchdog_timer;
};

/**
 * struct bq256xx_chip_info -
 * @model_id: device instance
 *
 * @bq256xx_regmap_config: regmap configuration struct
 * @bq256xx_get_ichg: pointer to instance specific get_ichg function
 * @bq256xx_get_iindpm: pointer to instance specific get_iindpm function
 * @bq256xx_get_vbatreg: pointer to instance specific get_vbatreg function
 * @bq256xx_get_iterm: pointer to instance specific get_iterm function
 * @bq256xx_get_iprechg: pointer to instance specific get_iprechg function
 * @bq256xx_get_vindpm: pointer to instance specific get_vindpm function
 *
 * @bq256xx_set_ichg: pointer to instance specific set_ichg function
 * @bq256xx_set_iindpm: pointer to instance specific set_iindpm function
 * @bq256xx_set_vbatreg: pointer to instance specific set_vbatreg function
 * @bq256xx_set_iterm: pointer to instance specific set_iterm function
 * @bq256xx_set_iprechg: pointer to instance specific set_iprechg function
 * @bq256xx_set_vindpm: pointer to instance specific set_vindpm function
 *
 * @bq256xx_def_ichg: default ichg value in microamps
 * @bq256xx_def_iindpm: default iindpm value in microamps
 * @bq256xx_def_vbatreg: default vbatreg value in microvolts
 * @bq256xx_def_iterm: default iterm value in microamps
 * @bq256xx_def_iprechg: default iprechg value in microamps
 * @bq256xx_def_vindpm: default vindpm value in microvolts
 *
 * @bq256xx_max_ichg: maximum charge current in microamps
 * @bq256xx_max_vbatreg: maximum battery regulation voltage in microvolts
 *
 * @has_usb_detect: indicates whether device has BC1.2 detection
 */
struct bq256xx_chip_info {
	int model_id;

	const struct regmap_config *bq256xx_regmap_config;

	int (*bq256xx_get_ichg)(struct bq256xx_device *bq);
	int (*bq256xx_get_iindpm)(struct bq256xx_device *bq);
	int (*bq256xx_get_vbatreg)(struct bq256xx_device *bq);
	int (*bq256xx_get_iterm)(struct bq256xx_device *bq);
	int (*bq256xx_get_iprechg)(struct bq256xx_device *bq);
	int (*bq256xx_get_vindpm)(struct bq256xx_device *bq);

	int (*bq256xx_set_ichg)(struct bq256xx_device *bq, int ichg);
	int (*bq256xx_set_iindpm)(struct bq256xx_device *bq, int iindpm);
	int (*bq256xx_set_vbatreg)(struct bq256xx_device *bq, int vbatreg);
	int (*bq256xx_set_iterm)(struct bq256xx_device *bq, int iterm);
	int (*bq256xx_set_iprechg)(struct bq256xx_device *bq, int iprechg);
	int (*bq256xx_set_vindpm)(struct bq256xx_device *bq, int vindpm);

	int bq256xx_def_ichg;
	int bq256xx_def_iindpm;
	int bq256xx_def_vbatreg;
	int bq256xx_def_iterm;
	int bq256xx_def_iprechg;
	int bq256xx_def_vindpm;

	int bq256xx_max_ichg;
	int bq256xx_max_vbatreg;

	bool has_usb_detect;
};

static int bq256xx_watchdog_time[BQ256XX_NUM_WD_VAL] = {
	0, 40000, 80000, 1600000
};

static const int bq25611d_vbatreg_values[] = {
	3494000, 3590000, 3686000, 3790000, 3894000, 3990000, 4090000, 4140000,
	4190000
};

static const int bq25618_619_vbatreg_values[] = {
	3504000, 3600000, 3696000, 3800000, 3904000, 4000000, 4100000, 4150000,
	4200000
};

static const int bq25618_619_ichg_values[] = {
	1290000, 1360000, 1430000, 1500000
};

static enum power_supply_usb_type bq256xx_usb_type[] = {
	POWER_SUPPLY_USB_TYPE_SDP,
	POWER_SUPPLY_USB_TYPE_CDP,
	POWER_SUPPLY_USB_TYPE_DCP,
	POWER_SUPPLY_USB_TYPE_UNKNOWN,
	POWER_SUPPLY_USB_TYPE_ACA,
};

static int bq256xx_array_parse(int array_size, int val, const int array[])
{
	int i = 0;

	if (val < array[i])
		return i - 1;

	if (val >= array[array_size - 1])
		return array_size - 1;

	for (i = 1; i < array_size; i++) {
		if (val == array[i])
			return i;

		if (val > array[i - 1] && val < array[i]) {
			if (val < array[i])
				return i - 1;
			else
				return i;
		}
	}
	return -EINVAL;
}

static int bq256xx_usb_notifier(struct notifier_block *nb, unsigned long val,
				void *priv)
{
	struct bq256xx_device *bq =
			container_of(nb, struct bq256xx_device, usb_nb);

	bq->usb_event = val;
	queue_work(system_power_efficient_wq, &bq->usb_work);

	return NOTIFY_OK;
}

static void bq256xx_usb_work(struct work_struct *data)
{
	struct bq256xx_device *bq =
			container_of(data, struct bq256xx_device, usb_work);

	switch (bq->usb_event) {
	case USB_EVENT_ID:
		break;
	case USB_EVENT_NONE:
		power_supply_changed(bq->charger);
		break;
	default:
		dev_err(bq->dev, "Error switching to charger mode.\n");
		break;
	}
}

static struct reg_default bq2560x_reg_defs[] = {
	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
	{BQ256XX_CHARGE_CURRENT_LIMIT, 0xa2},
	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x22},
	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x58},
	{BQ256XX_CHARGER_CONTROL_1, 0x9f},
	{BQ256XX_CHARGER_CONTROL_2, 0x66},
	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
};

static struct reg_default bq25611d_reg_defs[] = {
	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
	{BQ256XX_CHARGER_CONTROL_1, 0x9e},
	{BQ256XX_CHARGER_CONTROL_2, 0xe6},
	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
	{BQ256XX_PART_INFORMATION, 0x54},
	{BQ256XX_CHARGER_CONTROL_4, 0x75},
};

static struct reg_default bq25618_619_reg_defs[] = {
	{BQ256XX_INPUT_CURRENT_LIMIT, 0x17},
	{BQ256XX_CHARGER_CONTROL_0, 0x1a},
	{BQ256XX_CHARGE_CURRENT_LIMIT, 0x91},
	{BQ256XX_PRECHG_AND_TERM_CURR_LIM, 0x12},
	{BQ256XX_BATTERY_VOLTAGE_LIMIT, 0x40},
	{BQ256XX_CHARGER_CONTROL_1, 0x9e},
	{BQ256XX_CHARGER_CONTROL_2, 0xe6},
	{BQ256XX_CHARGER_CONTROL_3, 0x4c},
	{BQ256XX_PART_INFORMATION, 0x2c},
	{BQ256XX_CHARGER_CONTROL_4, 0x75},
};

static int bq256xx_get_state(struct bq256xx_device *bq,
				struct bq256xx_state *state)
{
	unsigned int charger_status_0;
	unsigned int charger_status_1;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_0,
						&charger_status_0);
	if (ret)
		return ret;

	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_STATUS_1,
						&charger_status_1);
	if (ret)
		return ret;

	state->vbus_stat = charger_status_0 & BQ256XX_VBUS_STAT_MASK;
	state->chrg_stat = charger_status_0 & BQ256XX_CHRG_STAT_MASK;
	state->online = charger_status_0 & BQ256XX_PG_STAT_MASK;

	state->wdt_fault = charger_status_1 & BQ256XX_WDT_FAULT_MASK;
	state->bat_fault = charger_status_1 & BQ256XX_BAT_FAULT_MASK;
	state->chrg_fault = charger_status_1 & BQ256XX_CHRG_FAULT_MASK;
	state->ntc_fault = charger_status_1 & BQ256XX_NTC_FAULT_MASK;

	return 0;
}

static int bq256xx_get_ichg_curr(struct bq256xx_device *bq)
{
	unsigned int charge_current_limit;
	unsigned int ichg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
						&charge_current_limit);
	if (ret)
		return ret;

	ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;

	return ichg_reg_code * BQ256XX_ICHG_STEP_uA;
}

static int bq25618_619_get_ichg_curr(struct bq256xx_device *bq)
{
	unsigned int charge_current_limit;
	unsigned int ichg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
						&charge_current_limit);
	if (ret)
		return ret;

	ichg_reg_code = charge_current_limit & BQ256XX_ICHG_MASK;

	if (ichg_reg_code < BQ25618_ICHG_THRESH)
		return ichg_reg_code * BQ25618_ICHG_STEP_uA;

	return bq25618_619_ichg_values[ichg_reg_code - BQ25618_ICHG_THRESH];
}

static int bq256xx_set_ichg_curr(struct bq256xx_device *bq, int ichg)
{
	unsigned int ichg_reg_code;
	int ichg_max = bq->init_data.ichg_max;

	ichg = clamp(ichg, BQ256XX_ICHG_MIN_uA, ichg_max);
	ichg_reg_code = ichg / BQ256XX_ICHG_STEP_uA;

	return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
					BQ256XX_ICHG_MASK, ichg_reg_code);
}

static int bq25618_619_set_ichg_curr(struct bq256xx_device *bq, int ichg)
{
	int array_size = ARRAY_SIZE(bq25618_619_ichg_values);
	unsigned int ichg_reg_code;
	int ichg_max = bq->init_data.ichg_max;

	ichg = clamp(ichg, BQ25618_ICHG_MIN_uA, ichg_max);

	if (ichg <= BQ25618_ICHG_THRESH_uA) {
		ichg_reg_code = ichg / BQ25618_ICHG_STEP_uA;
	} else {
		ichg_reg_code = bq256xx_array_parse(array_size, ichg,
			bq25618_619_ichg_values) + BQ25618_ICHG_THRESH;
	}

	return regmap_update_bits(bq->regmap, BQ256XX_CHARGE_CURRENT_LIMIT,
					BQ256XX_ICHG_MASK, ichg_reg_code);
}

static int bq25618_619_get_chrg_volt(struct bq256xx_device *bq)
{
	unsigned int battery_volt_lim;
	unsigned int vbatreg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
							&battery_volt_lim);

	if (ret)
		return ret;

	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
						BQ256XX_VBATREG_BIT_SHIFT;

	if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
		return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
					BQ2561X_VBATREG_STEP_uV) +
					BQ25618_VBATREG_THRESH_uV;

	return bq25618_619_vbatreg_values[vbatreg_reg_code];
}

static int bq25611d_get_chrg_volt(struct bq256xx_device *bq)
{
	unsigned int battery_volt_lim;
	unsigned int vbatreg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
							&battery_volt_lim);
	if (ret)
		return ret;

	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
						BQ256XX_VBATREG_BIT_SHIFT;

	if (vbatreg_reg_code > BQ2561X_VBATREG_THRESH)
		return ((vbatreg_reg_code - BQ2561X_VBATREG_THRESH) *
					BQ2561X_VBATREG_STEP_uV) +
					BQ25611D_VBATREG_THRESH_uV;

	return bq25611d_vbatreg_values[vbatreg_reg_code];
}

static int bq2560x_get_chrg_volt(struct bq256xx_device *bq)
{
	unsigned int battery_volt_lim;
	unsigned int vbatreg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
							&battery_volt_lim);
	if (ret)
		return ret;

	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
						BQ256XX_VBATREG_BIT_SHIFT;

	return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
					+ BQ2560X_VBATREG_OFFSET_uV;
}

static int bq25601d_get_chrg_volt(struct bq256xx_device *bq)
{
	unsigned int battery_volt_lim;
	unsigned int vbatreg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
							&battery_volt_lim);
	if (ret)
		return ret;

	vbatreg_reg_code = (battery_volt_lim & BQ256XX_VBATREG_MASK) >>
						BQ256XX_VBATREG_BIT_SHIFT;

	return (vbatreg_reg_code * BQ2560X_VBATREG_STEP_uV)
					+ BQ25601D_VBATREG_OFFSET_uV;
}

static int bq25618_619_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
	int array_size = ARRAY_SIZE(bq25618_619_vbatreg_values);
	unsigned int vbatreg_reg_code;
	int vbatreg_max = bq->init_data.vbatreg_max;

	vbatreg = clamp(vbatreg, BQ25618_VBATREG_MIN_uV, vbatreg_max);

	if (vbatreg > BQ25618_VBATREG_THRESH_uV)
		vbatreg_reg_code = ((vbatreg -
		BQ25618_VBATREG_THRESH_uV) /
		(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
	else {
		vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
						bq25618_619_vbatreg_values);
	}

	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
						BQ256XX_VBATREG_BIT_SHIFT);
}

static int bq25611d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
	int array_size = ARRAY_SIZE(bq25611d_vbatreg_values);
	unsigned int vbatreg_reg_code;
	int vbatreg_max = bq->init_data.vbatreg_max;

	vbatreg = clamp(vbatreg, BQ25611D_VBATREG_MIN_uV, vbatreg_max);

	if (vbatreg > BQ25611D_VBATREG_THRESH_uV)
		vbatreg_reg_code = ((vbatreg -
		BQ25611D_VBATREG_THRESH_uV) /
		(BQ2561X_VBATREG_STEP_uV)) + BQ2561X_VBATREG_THRESH;
	else {
		vbatreg_reg_code = bq256xx_array_parse(array_size, vbatreg,
						bq25611d_vbatreg_values);
	}

	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
						BQ256XX_VBATREG_BIT_SHIFT);
}

static int bq2560x_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
	unsigned int vbatreg_reg_code;
	int vbatreg_max = bq->init_data.vbatreg_max;

	vbatreg = clamp(vbatreg, BQ2560X_VBATREG_MIN_uV, vbatreg_max);

	vbatreg_reg_code = (vbatreg - BQ2560X_VBATREG_OFFSET_uV) /
						BQ2560X_VBATREG_STEP_uV;

	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
						BQ256XX_VBATREG_BIT_SHIFT);
}

static int bq25601d_set_chrg_volt(struct bq256xx_device *bq, int vbatreg)
{
	unsigned int vbatreg_reg_code;
	int vbatreg_max = bq->init_data.vbatreg_max;

	vbatreg = clamp(vbatreg, BQ25601D_VBATREG_MIN_uV, vbatreg_max);

	vbatreg_reg_code = (vbatreg - BQ25601D_VBATREG_OFFSET_uV) /
						BQ2560X_VBATREG_STEP_uV;

	return regmap_update_bits(bq->regmap, BQ256XX_BATTERY_VOLTAGE_LIMIT,
				BQ256XX_VBATREG_MASK, vbatreg_reg_code <<
						BQ256XX_VBATREG_BIT_SHIFT);
}

static int bq256xx_get_prechrg_curr(struct bq256xx_device *bq)
{
	unsigned int prechg_and_term_curr_lim;
	unsigned int iprechg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
						&prechg_and_term_curr_lim);
	if (ret)
		return ret;

	iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
						>> BQ256XX_IPRECHG_BIT_SHIFT;

	return (iprechg_reg_code * BQ256XX_IPRECHG_STEP_uA) +
						BQ256XX_IPRECHG_OFFSET_uA;
}

static int bq256xx_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
{
	unsigned int iprechg_reg_code;

	iprechg = clamp(iprechg, BQ256XX_IPRECHG_MIN_uA,
						BQ256XX_IPRECHG_MAX_uA);

	iprechg_reg_code = ((iprechg - BQ256XX_IPRECHG_OFFSET_uA) /
			BQ256XX_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;

	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
				BQ256XX_IPRECHG_MASK, iprechg_reg_code);
}

static int bq25618_619_get_prechrg_curr(struct bq256xx_device *bq)
{
	unsigned int prechg_and_term_curr_lim;
	unsigned int iprechg_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
						&prechg_and_term_curr_lim);
	if (ret)
		return ret;

	iprechg_reg_code = (prechg_and_term_curr_lim & BQ256XX_IPRECHG_MASK)
						>> BQ256XX_IPRECHG_BIT_SHIFT;

	return (iprechg_reg_code * BQ25618_IPRECHG_STEP_uA) +
						BQ25618_IPRECHG_OFFSET_uA;
}

static int bq25618_619_set_prechrg_curr(struct bq256xx_device *bq, int iprechg)
{
	unsigned int iprechg_reg_code;

	iprechg = clamp(iprechg, BQ25618_IPRECHG_MIN_uA,
						BQ25618_IPRECHG_MAX_uA);

	iprechg_reg_code = ((iprechg - BQ25618_IPRECHG_OFFSET_uA) /
			BQ25618_IPRECHG_STEP_uA) << BQ256XX_IPRECHG_BIT_SHIFT;

	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
				BQ256XX_IPRECHG_MASK, iprechg_reg_code);
}

static int bq256xx_get_term_curr(struct bq256xx_device *bq)
{
	unsigned int prechg_and_term_curr_lim;
	unsigned int iterm_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
						&prechg_and_term_curr_lim);
	if (ret)
		return ret;

	iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;

	return (iterm_reg_code * BQ256XX_ITERM_STEP_uA) +
						BQ256XX_ITERM_OFFSET_uA;
}

static int bq256xx_set_term_curr(struct bq256xx_device *bq, int iterm)
{
	unsigned int iterm_reg_code;

	iterm = clamp(iterm, BQ256XX_ITERM_MIN_uA, BQ256XX_ITERM_MAX_uA);

	iterm_reg_code = (iterm - BQ256XX_ITERM_OFFSET_uA) /
							BQ256XX_ITERM_STEP_uA;

	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
				BQ256XX_ITERM_MASK, iterm_reg_code);
}

static int bq25618_619_get_term_curr(struct bq256xx_device *bq)
{
	unsigned int prechg_and_term_curr_lim;
	unsigned int iterm_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
						&prechg_and_term_curr_lim);
	if (ret)
		return ret;

	iterm_reg_code = prechg_and_term_curr_lim & BQ256XX_ITERM_MASK;

	return (iterm_reg_code * BQ25618_ITERM_STEP_uA) +
						BQ25618_ITERM_OFFSET_uA;
}

static int bq25618_619_set_term_curr(struct bq256xx_device *bq, int iterm)
{
	unsigned int iterm_reg_code;

	iterm = clamp(iterm, BQ25618_ITERM_MIN_uA, BQ25618_ITERM_MAX_uA);

	iterm_reg_code = (iterm - BQ25618_ITERM_OFFSET_uA) /
							BQ25618_ITERM_STEP_uA;

	return regmap_update_bits(bq->regmap, BQ256XX_PRECHG_AND_TERM_CURR_LIM,
				BQ256XX_ITERM_MASK, iterm_reg_code);
}

static int bq256xx_get_input_volt_lim(struct bq256xx_device *bq)
{
	unsigned int charger_control_2;
	unsigned int vindpm_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
						&charger_control_2);
	if (ret)
		return ret;

	vindpm_reg_code = charger_control_2 & BQ256XX_VINDPM_MASK;

	return (vindpm_reg_code * BQ256XX_VINDPM_STEP_uV) +
						BQ256XX_VINDPM_OFFSET_uV;
}

static int bq256xx_set_input_volt_lim(struct bq256xx_device *bq, int vindpm)
{
	unsigned int vindpm_reg_code;

	vindpm = clamp(vindpm, BQ256XX_VINDPM_MIN_uV, BQ256XX_VINDPM_MAX_uV);

	vindpm_reg_code = (vindpm - BQ256XX_VINDPM_OFFSET_uV) /
						BQ256XX_VINDPM_STEP_uV;

	return regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_2,
					BQ256XX_VINDPM_MASK, vindpm_reg_code);
}

static int bq256xx_get_input_curr_lim(struct bq256xx_device *bq)
{
	unsigned int input_current_limit;
	unsigned int iindpm_reg_code;
	int ret;

	ret = regmap_read(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
						&input_current_limit);
	if (ret)
		return ret;

	iindpm_reg_code = input_current_limit & BQ256XX_IINDPM_MASK;

	return (iindpm_reg_code * BQ256XX_IINDPM_STEP_uA) +
						BQ256XX_IINDPM_OFFSET_uA;
}

static int bq256xx_set_input_curr_lim(struct bq256xx_device *bq, int iindpm)
{
	unsigned int iindpm_reg_code;

	iindpm = clamp(iindpm, BQ256XX_IINDPM_MIN_uA, BQ256XX_IINDPM_MAX_uA);

	iindpm_reg_code = (iindpm - BQ256XX_IINDPM_OFFSET_uA) /
							BQ256XX_IINDPM_STEP_uA;

	return regmap_update_bits(bq->regmap, BQ256XX_INPUT_CURRENT_LIMIT,
					BQ256XX_IINDPM_MASK, iindpm_reg_code);
}

static void bq256xx_charger_reset(void *data)
{
	struct bq256xx_device *bq = data;

	regmap_update_bits(bq->regmap, BQ256XX_PART_INFORMATION,
					BQ256XX_REG_RST, BQ256XX_REG_RST);

	if (!IS_ERR_OR_NULL(bq->usb2_phy))
		usb_unregister_notifier(bq->usb2_phy, &bq->usb_nb);

	if (!IS_ERR_OR_NULL(bq->usb3_phy))
		usb_unregister_notifier(bq->usb3_phy, &bq->usb_nb);
}

static int bq256xx_set_charger_property(struct power_supply *psy,
		enum power_supply_property prop,
		const union power_supply_propval *val)
{
	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
	int ret = -EINVAL;

	switch (prop) {
	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
		ret = bq->chip_info->bq256xx_set_iindpm(bq, val->intval);
		if (ret)
			return ret;
		break;

	case POWER_SUPPLY_PROP_STATUS:
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
		ret = bq->chip_info->bq256xx_set_vbatreg(bq, val->intval);
		if (ret)
			return ret;
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
		ret = bq->chip_info->bq256xx_set_ichg(bq, val->intval);
		if (ret)
			return ret;
		break;

	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
		ret = bq->chip_info->bq256xx_set_iprechg(bq, val->intval);
		if (ret)
			return ret;
		break;

	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
		ret = bq->chip_info->bq256xx_set_iterm(bq, val->intval);
		if (ret)
			return ret;
		break;

	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
		ret = bq->chip_info->bq256xx_set_vindpm(bq, val->intval);
		if (ret)
			return ret;
		break;

	default:
		break;
	}

	return ret;
}


static int bq256xx_get_battery_property(struct power_supply *psy,
				enum power_supply_property psp,
				union power_supply_propval *val)
{
	struct bq256xx_device *bq = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
		val->intval = bq->init_data.ichg_max;
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
		val->intval = bq->init_data.vbatreg_max;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int bq256xx_get_charger_property(struct power_supply *psy,
				enum power_supply_property psp,
				union power_supply_propval *val)
{
	struct bq256xx_device *bq = power_supply_get_drvdata(psy);
	struct bq256xx_state state;
	int ret = 0;

	mutex_lock(&bq->lock);
	ret = bq256xx_get_state(bq, &state);
	mutex_unlock(&bq->lock);
	if (ret)
		return ret;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		if (state.vbus_stat == BQ256XX_VBUS_STAT_NO_INPUT ||
		    state.vbus_stat == BQ256XX_VBUS_STAT_USB_OTG)
			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		else if (state.chrg_stat == BQ256XX_CHRG_STAT_NOT_CHRGING)
			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
		else if (state.chrg_stat == BQ256XX_CHRG_STAT_CHRG_TERM)
			val->intval = POWER_SUPPLY_STATUS_FULL;
		else
			val->intval = POWER_SUPPLY_STATUS_CHARGING;
		break;

	case POWER_SUPPLY_PROP_HEALTH:
		val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
		if (state.wdt_fault) {
			val->intval =
				POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
		} else if (state.bat_fault) {
			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		} else {
			switch (state.chrg_stat) {
			case BQ256XX_CHRG_FAULT_INPUT:
				val->intval =
					POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
				break;
			case BQ256XX_CHRG_FAULT_THERM:
				val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
				break;
			case BQ256XX_CHRG_FAULT_CST_EXPIRE:
				val->intval =
				POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
				break;
			default:
				break;
			}

			switch (state.ntc_fault) {
			case BQ256XX_NTC_FAULT_WARM:
				val->intval = POWER_SUPPLY_HEALTH_WARM;
				break;
			case BQ256XX_NTC_FAULT_COOL:
				val->intval = POWER_SUPPLY_HEALTH_COOL;
				break;
			case BQ256XX_NTC_FAULT_COLD:
				val->intval = POWER_SUPPLY_HEALTH_COLD;
				break;
			case BQ256XX_NTC_FAULT_HOT:
				val->intval = POWER_SUPPLY_HEALTH_HOT;
				break;
			default:
				val->intval = POWER_SUPPLY_HEALTH_GOOD;
				break;
			}
		}
		break;

	case POWER_SUPPLY_PROP_USB_TYPE:
		if (bq->chip_info->has_usb_detect) {
			switch (state.vbus_stat) {
			case BQ256XX_VBUS_STAT_USB_SDP:
				val->intval = POWER_SUPPLY_USB_TYPE_SDP;
				break;
			case BQ256XX_VBUS_STAT_USB_CDP:
				val->intval = POWER_SUPPLY_USB_TYPE_CDP;
				break;
			case BQ256XX_VBUS_STAT_USB_DCP:
				val->intval = POWER_SUPPLY_USB_TYPE_DCP;
				break;
			case BQ256XX_VBUS_STAT_USB_OTG:
				val->intval = POWER_SUPPLY_USB_TYPE_ACA;
				break;
			default:
				val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
				break;
			}
		} else {
			switch (state.vbus_stat) {
			case BQ256XX_VBUS_STAT_USB_SDP:
				val->intval = POWER_SUPPLY_USB_TYPE_SDP;
				break;
			case BQ256XX_VBUS_STAT_USB_OTG:
				val->intval = POWER_SUPPLY_USB_TYPE_ACA;
				break;
			default:
				val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
				break;
			}
		}
		break;

	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		switch (state.chrg_stat) {
		case BQ256XX_CHRG_STAT_NOT_CHRGING:
			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
			break;
		case BQ256XX_CHRG_STAT_PRECHRGING:
			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
			break;
		case BQ256XX_CHRG_STAT_FAST_CHRGING:
			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
			break;
		case BQ256XX_CHRG_STAT_CHRG_TERM:
			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
			break;
		default:
			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
		}
		break;

	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = BQ256XX_MANUFACTURER;
		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = bq->model_name;
		break;

	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = state.online;
		break;

	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
		ret = bq->chip_info->bq256xx_get_vindpm(bq);
		if (ret < 0)
			return ret;
		val->intval = ret;
		break;

	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
		ret = bq->chip_info->bq256xx_get_iindpm(bq);
		if (ret < 0)
			return ret;
		val->intval = ret;
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
		ret = bq->chip_info->bq256xx_get_vbatreg(bq);
		if (ret < 0)
			return ret;
		val->intval = ret;
		break;

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
		ret = bq->chip_info->bq256xx_get_ichg(bq);
		if (ret < 0)
			return ret;
		val->intval = ret;
		break;

	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
		ret = bq->chip_info->bq256xx_get_iprechg(bq);
		if (ret < 0)
			return ret;
		val->intval = ret;
		break;

	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
		ret = bq->chip_info->bq256xx_get_iterm(bq);
		if (ret < 0)
			return ret;
		val->intval = ret;
		break;

	default:
		return -EINVAL;
	}

	return ret;
}

static bool bq256xx_state_changed(struct bq256xx_device *bq,
				  struct bq256xx_state *new_state)
{
	struct bq256xx_state old_state;

	mutex_lock(&bq->lock);
	old_state = bq->state;
	mutex_unlock(&bq->lock);

	return memcmp(&old_state, new_state, sizeof(struct bq256xx_state)) != 0;
}

static irqreturn_t bq256xx_irq_handler_thread(int irq, void *private)
{
	struct bq256xx_device *bq = private;
	struct bq256xx_state state;
	int ret;

	ret = bq256xx_get_state(bq, &state);
	if (ret < 0)
		goto irq_out;

	if (!bq256xx_state_changed(bq, &state))
		goto irq_out;

	mutex_lock(&bq->lock);
	bq->state = state;
	mutex_unlock(&bq->lock);

	power_supply_changed(bq->charger);

irq_out:
	return IRQ_HANDLED;
}

static enum power_supply_property bq256xx_power_supply_props[] = {
	POWER_SUPPLY_PROP_MANUFACTURER,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
	POWER_SUPPLY_PROP_CHARGE_TYPE,
	POWER_SUPPLY_PROP_USB_TYPE,
	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
};

static enum power_supply_property bq256xx_battery_props[] = {
	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
};

static int bq256xx_property_is_writeable(struct power_supply *psy,
					 enum power_supply_property prop)
{
	switch (prop) {
	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
	case POWER_SUPPLY_PROP_STATUS:
	case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
		return true;
	default:
		return false;
	}
}

static const struct power_supply_desc bq256xx_power_supply_desc = {
	.name = "bq256xx-charger",
	.type = POWER_SUPPLY_TYPE_USB,
	.usb_types = bq256xx_usb_type,
	.num_usb_types = ARRAY_SIZE(bq256xx_usb_type),
	.properties = bq256xx_power_supply_props,
	.num_properties = ARRAY_SIZE(bq256xx_power_supply_props),
	.get_property = bq256xx_get_charger_property,
	.set_property = bq256xx_set_charger_property,
	.property_is_writeable = bq256xx_property_is_writeable,
};

static struct power_supply_desc bq256xx_battery_desc = {
	.name			= "bq256xx-battery",
	.type			= POWER_SUPPLY_TYPE_BATTERY,
	.get_property		= bq256xx_get_battery_property,
	.properties		= bq256xx_battery_props,
	.num_properties		= ARRAY_SIZE(bq256xx_battery_props),
	.property_is_writeable	= bq256xx_property_is_writeable,
};


static bool bq256xx_is_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case BQ256XX_INPUT_CURRENT_LIMIT:
	case BQ256XX_CHARGER_STATUS_0...BQ256XX_CHARGER_STATUS_2:
		return true;
	default:
		return false;
	}
}

static const struct regmap_config bq25600_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = BQ256XX_PART_INFORMATION,
	.reg_defaults	= bq2560x_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(bq2560x_reg_defs),
	.cache_type = REGCACHE_FLAT,
	.volatile_reg = bq256xx_is_volatile_reg,
};

static const struct regmap_config bq25611d_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = BQ256XX_CHARGER_CONTROL_4,
	.reg_defaults	= bq25611d_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(bq25611d_reg_defs),
	.cache_type = REGCACHE_FLAT,
	.volatile_reg = bq256xx_is_volatile_reg,
};

static const struct regmap_config bq25618_619_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = BQ256XX_CHARGER_CONTROL_4,
	.reg_defaults	= bq25618_619_reg_defs,
	.num_reg_defaults = ARRAY_SIZE(bq25618_619_reg_defs),
	.cache_type = REGCACHE_FLAT,
	.volatile_reg = bq256xx_is_volatile_reg,
};

static const struct bq256xx_chip_info bq256xx_chip_info_tbl[] = {
	[BQ25600] = {
		.model_id = BQ25600,
		.bq256xx_regmap_config = &bq25600_regmap_config,
		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
		.bq256xx_get_iterm = bq256xx_get_term_curr,
		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
		.bq256xx_set_iterm = bq256xx_set_term_curr,
		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,

		.has_usb_detect = false,
	},

	[BQ25600D] = {
		.model_id = BQ25600D,
		.bq256xx_regmap_config = &bq25600_regmap_config,
		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
		.bq256xx_get_iterm = bq256xx_get_term_curr,
		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
		.bq256xx_set_iterm = bq256xx_set_term_curr,
		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,

		.has_usb_detect = true,
	},

	[BQ25601] = {
		.model_id = BQ25601,
		.bq256xx_regmap_config = &bq25600_regmap_config,
		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq2560x_get_chrg_volt,
		.bq256xx_get_iterm = bq256xx_get_term_curr,
		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq2560x_set_chrg_volt,
		.bq256xx_set_iterm = bq256xx_set_term_curr,
		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,

		.has_usb_detect = false,
	},

	[BQ25601D] = {
		.model_id = BQ25601D,
		.bq256xx_regmap_config = &bq25600_regmap_config,
		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq25601d_get_chrg_volt,
		.bq256xx_get_iterm = bq256xx_get_term_curr,
		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq25601d_set_chrg_volt,
		.bq256xx_set_iterm = bq256xx_set_term_curr,
		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ2560X_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ2560X_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ2560X_VBATREG_MAX_uV,

		.has_usb_detect = true,
	},

	[BQ25611D] = {
		.model_id = BQ25611D,
		.bq256xx_regmap_config = &bq25611d_regmap_config,
		.bq256xx_get_ichg = bq256xx_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq25611d_get_chrg_volt,
		.bq256xx_get_iterm = bq256xx_get_term_curr,
		.bq256xx_get_iprechg = bq256xx_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq256xx_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq25611d_set_chrg_volt,
		.bq256xx_set_iterm = bq256xx_set_term_curr,
		.bq256xx_set_iprechg = bq256xx_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ25611D_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ25611D_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ256XX_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ256XX_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ256XX_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ25611D_VBATREG_MAX_uV,

		.has_usb_detect = true,
	},

	[BQ25618] = {
		.model_id = BQ25618,
		.bq256xx_regmap_config = &bq25618_619_regmap_config,
		.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
		.bq256xx_get_iterm = bq25618_619_get_term_curr,
		.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
		.bq256xx_set_iterm = bq25618_619_set_term_curr,
		.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,

		.has_usb_detect = false,
	},

	[BQ25619] = {
		.model_id = BQ25619,
		.bq256xx_regmap_config = &bq25618_619_regmap_config,
		.bq256xx_get_ichg = bq25618_619_get_ichg_curr,
		.bq256xx_get_iindpm = bq256xx_get_input_curr_lim,
		.bq256xx_get_vbatreg = bq25618_619_get_chrg_volt,
		.bq256xx_get_iterm = bq25618_619_get_term_curr,
		.bq256xx_get_iprechg = bq25618_619_get_prechrg_curr,
		.bq256xx_get_vindpm = bq256xx_get_input_volt_lim,

		.bq256xx_set_ichg = bq25618_619_set_ichg_curr,
		.bq256xx_set_iindpm = bq256xx_set_input_curr_lim,
		.bq256xx_set_vbatreg = bq25618_619_set_chrg_volt,
		.bq256xx_set_iterm = bq25618_619_set_term_curr,
		.bq256xx_set_iprechg = bq25618_619_set_prechrg_curr,
		.bq256xx_set_vindpm = bq256xx_set_input_volt_lim,

		.bq256xx_def_ichg = BQ25618_ICHG_DEF_uA,
		.bq256xx_def_iindpm = BQ256XX_IINDPM_DEF_uA,
		.bq256xx_def_vbatreg = BQ25618_VBATREG_DEF_uV,
		.bq256xx_def_iterm = BQ25618_ITERM_DEF_uA,
		.bq256xx_def_iprechg = BQ25618_IPRECHG_DEF_uA,
		.bq256xx_def_vindpm = BQ256XX_VINDPM_DEF_uV,

		.bq256xx_max_ichg = BQ25618_ICHG_MAX_uA,
		.bq256xx_max_vbatreg = BQ25618_VBATREG_MAX_uV,

		.has_usb_detect = false,
	},
};

static int bq256xx_power_supply_init(struct bq256xx_device *bq,
		struct power_supply_config *psy_cfg, struct device *dev)
{
	bq->charger = devm_power_supply_register(bq->dev,
						 &bq256xx_power_supply_desc,
						 psy_cfg);
	if (IS_ERR(bq->charger)) {
		dev_err(dev, "power supply register charger failed\n");
		return PTR_ERR(bq->charger);
	}

	bq->battery = devm_power_supply_register(bq->dev,
						      &bq256xx_battery_desc,
						      psy_cfg);
	if (IS_ERR(bq->battery)) {
		dev_err(dev, "power supply register battery failed\n");
		return PTR_ERR(bq->battery);
	}
	return 0;
}

static int bq256xx_hw_init(struct bq256xx_device *bq)
{
	struct power_supply_battery_info *bat_info;
	int wd_reg_val = BQ256XX_WATCHDOG_DIS;
	int ret = 0;
	int i;

	for (i = 0; i < BQ256XX_NUM_WD_VAL; i++) {
		if (bq->watchdog_timer == bq256xx_watchdog_time[i]) {
			wd_reg_val = i;
			break;
		}
		if (bq->watchdog_timer > bq256xx_watchdog_time[i] &&
		    bq->watchdog_timer < bq256xx_watchdog_time[i + 1])
			wd_reg_val = i;
	}
	ret = regmap_update_bits(bq->regmap, BQ256XX_CHARGER_CONTROL_1,
				 BQ256XX_WATCHDOG_MASK, wd_reg_val <<
						BQ256XX_WDT_BIT_SHIFT);

	ret = power_supply_get_battery_info(bq->charger, &bat_info);
	if (ret == -ENOMEM)
		return ret;

	if (ret) {
		dev_warn(bq->dev, "battery info missing, default values will be applied\n");

		bat_info->constant_charge_current_max_ua =
				bq->chip_info->bq256xx_def_ichg;

		bat_info->constant_charge_voltage_max_uv =
				bq->chip_info->bq256xx_def_vbatreg;

		bat_info->precharge_current_ua =
				bq->chip_info->bq256xx_def_iprechg;

		bat_info->charge_term_current_ua =
				bq->chip_info->bq256xx_def_iterm;

		bq->init_data.ichg_max =
				bq->chip_info->bq256xx_max_ichg;

		bq->init_data.vbatreg_max =
				bq->chip_info->bq256xx_max_vbatreg;
	} else {
		bq->init_data.ichg_max =
			bat_info->constant_charge_current_max_ua;

		bq->init_data.vbatreg_max =
			bat_info->constant_charge_voltage_max_uv;
	}

	ret = bq->chip_info->bq256xx_set_vindpm(bq, bq->init_data.vindpm);
	if (ret)
		return ret;

	ret = bq->chip_info->bq256xx_set_iindpm(bq, bq->init_data.iindpm);
	if (ret)
		return ret;

	ret = bq->chip_info->bq256xx_set_ichg(bq,
				bat_info->constant_charge_current_max_ua);
	if (ret)
		return ret;

	ret = bq->chip_info->bq256xx_set_iprechg(bq,
				bat_info->precharge_current_ua);
	if (ret)
		return ret;

	ret = bq->chip_info->bq256xx_set_vbatreg(bq,
				bat_info->constant_charge_voltage_max_uv);
	if (ret)
		return ret;

	ret = bq->chip_info->bq256xx_set_iterm(bq,
				bat_info->charge_term_current_ua);
	if (ret)
		return ret;

	power_supply_put_battery_info(bq->charger, bat_info);

	return 0;
}

static int bq256xx_parse_dt(struct bq256xx_device *bq,
		struct power_supply_config *psy_cfg, struct device *dev)
{
	int ret = 0;

	psy_cfg->drv_data = bq;
	psy_cfg->of_node = dev->of_node;

	ret = device_property_read_u32(bq->dev, "ti,watchdog-timeout-ms",
				       &bq->watchdog_timer);
	if (ret)
		bq->watchdog_timer = BQ256XX_WATCHDOG_DIS;

	if (bq->watchdog_timer > BQ256XX_WATCHDOG_MAX ||
	    bq->watchdog_timer < BQ256XX_WATCHDOG_DIS)
		return -EINVAL;

	ret = device_property_read_u32(bq->dev,
				       "input-voltage-limit-microvolt",
				       &bq->init_data.vindpm);
	if (ret)
		bq->init_data.vindpm = bq->chip_info->bq256xx_def_vindpm;

	ret = device_property_read_u32(bq->dev,
				       "input-current-limit-microamp",
				       &bq->init_data.iindpm);
	if (ret)
		bq->init_data.iindpm = bq->chip_info->bq256xx_def_iindpm;

	return 0;
}

static int bq256xx_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct bq256xx_device *bq;
	struct power_supply_config psy_cfg = { };

	int ret;

	bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
	if (!bq)
		return -ENOMEM;

	bq->client = client;
	bq->dev = dev;
	bq->chip_info = &bq256xx_chip_info_tbl[id->driver_data];

	mutex_init(&bq->lock);

	strncpy(bq->model_name, id->name, I2C_NAME_SIZE);

	bq->regmap = devm_regmap_init_i2c(client,
					bq->chip_info->bq256xx_regmap_config);

	if (IS_ERR(bq->regmap)) {
		dev_err(dev, "Failed to allocate register map\n");
		return PTR_ERR(bq->regmap);
	}

	i2c_set_clientdata(client, bq);

	ret = bq256xx_parse_dt(bq, &psy_cfg, dev);
	if (ret) {
		dev_err(dev, "Failed to read device tree properties%d\n", ret);
		return ret;
	}

	ret = devm_add_action_or_reset(dev, bq256xx_charger_reset, bq);
	if (ret)
		return ret;

	/* OTG reporting */
	bq->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	if (!IS_ERR_OR_NULL(bq->usb2_phy)) {
		INIT_WORK(&bq->usb_work, bq256xx_usb_work);
		bq->usb_nb.notifier_call = bq256xx_usb_notifier;
		usb_register_notifier(bq->usb2_phy, &bq->usb_nb);
	}

	bq->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
	if (!IS_ERR_OR_NULL(bq->usb3_phy)) {
		INIT_WORK(&bq->usb_work, bq256xx_usb_work);
		bq->usb_nb.notifier_call = bq256xx_usb_notifier;
		usb_register_notifier(bq->usb3_phy, &bq->usb_nb);
	}

	if (client->irq) {
		ret = devm_request_threaded_irq(dev, client->irq, NULL,
						bq256xx_irq_handler_thread,
						IRQF_TRIGGER_FALLING |
						IRQF_ONESHOT,
						dev_name(&client->dev), bq);
		if (ret < 0) {
			dev_err(dev, "get irq fail: %d\n", ret);
			return ret;
		}
	}

	ret = bq256xx_power_supply_init(bq, &psy_cfg, dev);
	if (ret) {
		dev_err(dev, "Failed to register power supply\n");
		return ret;
	}

	ret = bq256xx_hw_init(bq);
	if (ret) {
		dev_err(dev, "Cannot initialize the chip.\n");
		return ret;
	}

	return ret;
}

static const struct i2c_device_id bq256xx_i2c_ids[] = {
	{ "bq25600", BQ25600 },
	{ "bq25600d", BQ25600D },
	{ "bq25601", BQ25601 },
	{ "bq25601d", BQ25601D },
	{ "bq25611d", BQ25611D },
	{ "bq25618", BQ25618 },
	{ "bq25619", BQ25619 },
	{},
};
MODULE_DEVICE_TABLE(i2c, bq256xx_i2c_ids);

static const struct of_device_id bq256xx_of_match[] = {
	{ .compatible = "ti,bq25600", .data = (void *)BQ25600 },
	{ .compatible = "ti,bq25600d", .data = (void *)BQ25600D },
	{ .compatible = "ti,bq25601", .data = (void *)BQ25601 },
	{ .compatible = "ti,bq25601d", .data = (void *)BQ25601D },
	{ .compatible = "ti,bq25611d", .data = (void *)BQ25611D },
	{ .compatible = "ti,bq25618", .data = (void *)BQ25618 },
	{ .compatible = "ti,bq25619", .data = (void *)BQ25619 },
	{ },
};
MODULE_DEVICE_TABLE(of, bq256xx_of_match);

static const struct acpi_device_id bq256xx_acpi_match[] = {
	{ "bq25600", BQ25600 },
	{ "bq25600d", BQ25600D },
	{ "bq25601", BQ25601 },
	{ "bq25601d", BQ25601D },
	{ "bq25611d", BQ25611D },
	{ "bq25618", BQ25618 },
	{ "bq25619", BQ25619 },
	{},
};
MODULE_DEVICE_TABLE(acpi, bq256xx_acpi_match);

static struct i2c_driver bq256xx_driver = {
	.driver = {
		.name = "bq256xx-charger",
		.of_match_table = bq256xx_of_match,
		.acpi_match_table = bq256xx_acpi_match,
	},
	.probe = bq256xx_probe,
	.id_table = bq256xx_i2c_ids,
};
module_i2c_driver(bq256xx_driver);

MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
MODULE_DESCRIPTION("bq256xx charger driver");
MODULE_LICENSE("GPL v2");
