[mirror_ubuntu-zesty-kernel.git] / drivers / power / supply / act8945a_charger.c

/*
 * Power supply driver for the Active-semi ACT8945A PMIC
 *
 * Copyright (C) 2015 Atmel Corporation
 *
 * Author: Wenyou Yang <wenyou.yang@atmel.com>
 *
 * 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/of.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>

static const char *act8945a_charger_model = "ACT8945A";
static const char *act8945a_charger_manufacturer = "Active-semi";

/**
 * ACT8945A Charger Register Map
 */

/* 0x70: Reserved */
#define ACT8945A_APCH_CFG		0x71
#define ACT8945A_APCH_STATUS		0x78
#define ACT8945A_APCH_CTRL		0x79
#define ACT8945A_APCH_STATE		0x7A

/* ACT8945A_APCH_CFG */
#define APCH_CFG_OVPSET			(0x3 << 0)
#define APCH_CFG_OVPSET_6V6		(0x0 << 0)
#define APCH_CFG_OVPSET_7V		(0x1 << 0)
#define APCH_CFG_OVPSET_7V5		(0x2 << 0)
#define APCH_CFG_OVPSET_8V		(0x3 << 0)
#define APCH_CFG_PRETIMO		(0x3 << 2)
#define APCH_CFG_PRETIMO_40_MIN		(0x0 << 2)
#define APCH_CFG_PRETIMO_60_MIN		(0x1 << 2)
#define APCH_CFG_PRETIMO_80_MIN		(0x2 << 2)
#define APCH_CFG_PRETIMO_DISABLED	(0x3 << 2)
#define APCH_CFG_TOTTIMO		(0x3 << 4)
#define APCH_CFG_TOTTIMO_3_HOUR		(0x0 << 4)
#define APCH_CFG_TOTTIMO_4_HOUR		(0x1 << 4)
#define APCH_CFG_TOTTIMO_5_HOUR		(0x2 << 4)
#define APCH_CFG_TOTTIMO_DISABLED	(0x3 << 4)
#define APCH_CFG_SUSCHG			(0x1 << 7)

#define APCH_STATUS_CHGDAT		BIT(0)
#define APCH_STATUS_INDAT		BIT(1)
#define APCH_STATUS_TEMPDAT		BIT(2)
#define APCH_STATUS_TIMRDAT		BIT(3)
#define APCH_STATUS_CHGSTAT		BIT(4)
#define APCH_STATUS_INSTAT		BIT(5)
#define APCH_STATUS_TEMPSTAT		BIT(6)
#define APCH_STATUS_TIMRSTAT		BIT(7)

#define APCH_CTRL_CHGEOCOUT		BIT(0)
#define APCH_CTRL_INDIS			BIT(1)
#define APCH_CTRL_TEMPOUT		BIT(2)
#define APCH_CTRL_TIMRPRE		BIT(3)
#define APCH_CTRL_CHGEOCIN		BIT(4)
#define APCH_CTRL_INCON			BIT(5)
#define APCH_CTRL_TEMPIN		BIT(6)
#define APCH_CTRL_TIMRTOT		BIT(7)

#define APCH_STATE_ACINSTAT		(0x1 << 1)
#define APCH_STATE_CSTATE		(0x3 << 4)
#define APCH_STATE_CSTATE_SHIFT		4
#define APCH_STATE_CSTATE_DISABLED	0x00
#define APCH_STATE_CSTATE_EOC		0x01
#define APCH_STATE_CSTATE_FAST		0x02
#define APCH_STATE_CSTATE_PRE		0x03

struct act8945a_charger {
	struct regmap *regmap;
};

static int act8945a_get_charger_state(struct regmap *regmap, int *val)
{
	int ret;
	unsigned int status, state;

	ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
	if (ret < 0)
		return ret;

	ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
	if (ret < 0)
		return ret;

	state &= APCH_STATE_CSTATE;
	state >>= APCH_STATE_CSTATE_SHIFT;

	switch (state) {
	case APCH_STATE_CSTATE_PRE:
	case APCH_STATE_CSTATE_FAST:
		*val = POWER_SUPPLY_STATUS_CHARGING;
		break;
	case APCH_STATE_CSTATE_EOC:
		if (status & APCH_STATUS_CHGDAT)
			*val = POWER_SUPPLY_STATUS_FULL;
		else
			*val = POWER_SUPPLY_STATUS_CHARGING;
		break;
	case APCH_STATE_CSTATE_DISABLED:
	default:
		if (!(status & APCH_STATUS_INDAT))
			*val = POWER_SUPPLY_STATUS_DISCHARGING;
		else
			*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
		break;
	}

	return 0;
}

static int act8945a_get_charge_type(struct regmap *regmap, int *val)
{
	int ret;
	unsigned int status, state;

	ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
	if (ret < 0)
		return ret;

	ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
	if (ret < 0)
		return ret;

	state &= APCH_STATE_CSTATE;
	state >>= APCH_STATE_CSTATE_SHIFT;

	switch (state) {
	case APCH_STATE_CSTATE_PRE:
		*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
		break;
	case APCH_STATE_CSTATE_FAST:
		*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
		break;
	case APCH_STATE_CSTATE_EOC:
		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
		break;
	case APCH_STATE_CSTATE_DISABLED:
	default:
		if (!(status & APCH_STATUS_INDAT))
			*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
		else
			*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
		break;
	}

	return 0;
}

static int act8945a_get_battery_health(struct regmap *regmap, int *val)
{
	int ret;
	unsigned int status, state, config;

	ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
	if (ret < 0)
		return ret;

	ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
	if (ret < 0)
		return ret;

	ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
	if (ret < 0)
		return ret;

	state &= APCH_STATE_CSTATE;
	state >>= APCH_STATE_CSTATE_SHIFT;

	switch (state) {
	case APCH_STATE_CSTATE_DISABLED:
		if (config & APCH_CFG_SUSCHG) {
			*val = POWER_SUPPLY_HEALTH_UNKNOWN;
		} else if (status & APCH_STATUS_INDAT) {
			if (!(status & APCH_STATUS_TEMPDAT))
				*val = POWER_SUPPLY_HEALTH_OVERHEAT;
			else if (status & APCH_STATUS_TIMRDAT)
				*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
			else
				*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		} else {
			*val = POWER_SUPPLY_HEALTH_GOOD;
		}
		break;
	case APCH_STATE_CSTATE_PRE:
	case APCH_STATE_CSTATE_FAST:
	case APCH_STATE_CSTATE_EOC:
	default:
		*val = POWER_SUPPLY_HEALTH_GOOD;
		break;
	}

	return 0;
}

static enum power_supply_property act8945a_charger_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_CHARGE_TYPE,
	POWER_SUPPLY_PROP_TECHNOLOGY,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_MANUFACTURER
};

static int act8945a_charger_get_property(struct power_supply *psy,
					 enum power_supply_property prop,
					 union power_supply_propval *val)
{
	struct act8945a_charger *charger = power_supply_get_drvdata(psy);
	struct regmap *regmap = charger->regmap;
	int ret = 0;

	switch (prop) {
	case POWER_SUPPLY_PROP_STATUS:
		ret = act8945a_get_charger_state(regmap, &val->intval);
		break;
	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		ret = act8945a_get_charge_type(regmap, &val->intval);
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		ret = act8945a_get_battery_health(regmap, &val->intval);
		break;
	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = act8945a_charger_model;
		break;
	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = act8945a_charger_manufacturer;
		break;
	default:
		return -EINVAL;
	}

	return ret;
}

static const struct power_supply_desc act8945a_charger_desc = {
	.name		= "act8945a-charger",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.get_property	= act8945a_charger_get_property,
	.properties	= act8945a_charger_props,
	.num_properties	= ARRAY_SIZE(act8945a_charger_props),
};

#define DEFAULT_TOTAL_TIME_OUT		3
#define DEFAULT_PRE_TIME_OUT		40
#define DEFAULT_INPUT_OVP_THRESHOLD	6600

static int act8945a_charger_config(struct device *dev,
				   struct act8945a_charger *charger)
{
	struct device_node *np = dev->of_node;
	enum of_gpio_flags flags;
	struct regmap *regmap = charger->regmap;

	u32 total_time_out;
	u32 pre_time_out;
	u32 input_voltage_threshold;
	int chglev_pin;
	int ret;

	unsigned int tmp;
	unsigned int value = 0;

	if (!np) {
		dev_err(dev, "no charger of node\n");
		return -EINVAL;
	}

	ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp);
	if (ret)
		return ret;

	if (tmp & APCH_CFG_SUSCHG) {
		value |= APCH_CFG_SUSCHG;
		dev_info(dev, "have been suspended\n");
	}

	chglev_pin = of_get_named_gpio_flags(np,
				"active-semi,chglev-gpios", 0, &flags);

	if (gpio_is_valid(chglev_pin)) {
		gpio_set_value(chglev_pin,
			       ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
	}

	if (of_property_read_u32(np,
				 "active-semi,input-voltage-threshold-microvolt",
				 &input_voltage_threshold))
		input_voltage_threshold = DEFAULT_INPUT_OVP_THRESHOLD;

	if (of_property_read_u32(np,
				 "active-semi,precondition-timeout",
				 &pre_time_out))
		pre_time_out = DEFAULT_PRE_TIME_OUT;

	if (of_property_read_u32(np, "active-semi,total-timeout",
				 &total_time_out))
		total_time_out = DEFAULT_TOTAL_TIME_OUT;

	switch (input_voltage_threshold) {
	case 8000:
		value |= APCH_CFG_OVPSET_8V;
		break;
	case 7500:
		value |= APCH_CFG_OVPSET_7V5;
		break;
	case 7000:
		value |= APCH_CFG_OVPSET_7V;
		break;
	case 6600:
	default:
		value |= APCH_CFG_OVPSET_6V6;
		break;
	}

	switch (pre_time_out) {
	case 60:
		value |= APCH_CFG_PRETIMO_60_MIN;
		break;
	case 80:
		value |= APCH_CFG_PRETIMO_80_MIN;
		break;
	case 0:
		value |= APCH_CFG_PRETIMO_DISABLED;
		break;
	case 40:
	default:
		value |= APCH_CFG_PRETIMO_40_MIN;
		break;
	}

	switch (total_time_out) {
	case 4:
		value |= APCH_CFG_TOTTIMO_4_HOUR;
		break;
	case 5:
		value |= APCH_CFG_TOTTIMO_5_HOUR;
		break;
	case 0:
		value |= APCH_CFG_TOTTIMO_DISABLED;
		break;
	case 3:
	default:
		value |= APCH_CFG_TOTTIMO_3_HOUR;
		break;
	}

	return regmap_write(regmap, ACT8945A_APCH_CFG, value);
}

static int act8945a_charger_probe(struct platform_device *pdev)
{
	struct act8945a_charger *charger;
	struct power_supply *psy;
	struct power_supply_config psy_cfg = {};
	int ret;

	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
	if (!charger)
		return -ENOMEM;

	charger->regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!charger->regmap) {
		dev_err(&pdev->dev, "Parent did not provide regmap\n");
		return -EINVAL;
	}

	ret = act8945a_charger_config(&pdev->dev, charger);
	if (ret)
		return ret;

	psy_cfg.of_node	= pdev->dev.of_node;
	psy_cfg.drv_data = charger;

	psy = devm_power_supply_register(&pdev->dev,
					 &act8945a_charger_desc,
					 &psy_cfg);
	if (IS_ERR(psy)) {
		dev_err(&pdev->dev, "failed to register power supply\n");
		return PTR_ERR(psy);
	}

	return 0;
}

static struct platform_driver act8945a_charger_driver = {
	.driver	= {
		.name = "act8945a-charger",
	},
	.probe	= act8945a_charger_probe,
};
module_platform_driver(act8945a_charger_driver);

MODULE_DESCRIPTION("Active-semi ACT8945A ActivePath charger driver");
MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
5c0e09e0 WY	1	/*
	2	* Power supply driver for the Active-semi ACT8945A PMIC
	3	*
	4	* Copyright (C) 2015 Atmel Corporation
	5	*
	6	* Author: Wenyou Yang <wenyou.yang@atmel.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
	13	#include <linux/module.h>
	14	#include <linux/of.h>
	15	#include <linux/of_gpio.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/power_supply.h>
	18	#include <linux/regmap.h>
	19
	20	static const char *act8945a_charger_model = "ACT8945A";
	21	static const char *act8945a_charger_manufacturer = "Active-semi";
	22
	23	/**
	24	* ACT8945A Charger Register Map
	25	*/
	26
	27	/* 0x70: Reserved */
	28	#define ACT8945A_APCH_CFG 0x71
	29	#define ACT8945A_APCH_STATUS 0x78
	30	#define ACT8945A_APCH_CTRL 0x79
	31	#define ACT8945A_APCH_STATE 0x7A
	32
	33	/* ACT8945A_APCH_CFG */
	34	#define APCH_CFG_OVPSET (0x3 << 0)
	35	#define APCH_CFG_OVPSET_6V6 (0x0 << 0)
	36	#define APCH_CFG_OVPSET_7V (0x1 << 0)
	37	#define APCH_CFG_OVPSET_7V5 (0x2 << 0)
	38	#define APCH_CFG_OVPSET_8V (0x3 << 0)
	39	#define APCH_CFG_PRETIMO (0x3 << 2)
	40	#define APCH_CFG_PRETIMO_40_MIN (0x0 << 2)
	41	#define APCH_CFG_PRETIMO_60_MIN (0x1 << 2)
	42	#define APCH_CFG_PRETIMO_80_MIN (0x2 << 2)
	43	#define APCH_CFG_PRETIMO_DISABLED (0x3 << 2)
	44	#define APCH_CFG_TOTTIMO (0x3 << 4)
	45	#define APCH_CFG_TOTTIMO_3_HOUR (0x0 << 4)
	46	#define APCH_CFG_TOTTIMO_4_HOUR (0x1 << 4)
	47	#define APCH_CFG_TOTTIMO_5_HOUR (0x2 << 4)
	48	#define APCH_CFG_TOTTIMO_DISABLED (0x3 << 4)
	49	#define APCH_CFG_SUSCHG (0x1 << 7)
	50
	51	#define APCH_STATUS_CHGDAT BIT(0)
	52	#define APCH_STATUS_INDAT BIT(1)
	53	#define APCH_STATUS_TEMPDAT BIT(2)
	54	#define APCH_STATUS_TIMRDAT BIT(3)
	55	#define APCH_STATUS_CHGSTAT BIT(4)
	56	#define APCH_STATUS_INSTAT BIT(5)
	57	#define APCH_STATUS_TEMPSTAT BIT(6)
	58	#define APCH_STATUS_TIMRSTAT BIT(7)
	59
	60	#define APCH_CTRL_CHGEOCOUT BIT(0)
	61	#define APCH_CTRL_INDIS BIT(1)
	62	#define APCH_CTRL_TEMPOUT BIT(2)
	63	#define APCH_CTRL_TIMRPRE BIT(3)
	64	#define APCH_CTRL_CHGEOCIN BIT(4)
65	#define APCH_CTRL_INCON BIT(5)
66	#define APCH_CTRL_TEMPIN BIT(6)
67	#define APCH_CTRL_TIMRTOT BIT(7)
68
69	#define APCH_STATE_ACINSTAT (0x1 << 1)
70	#define APCH_STATE_CSTATE (0x3 << 4)
71	#define APCH_STATE_CSTATE_SHIFT 4
72	#define APCH_STATE_CSTATE_DISABLED 0x00
73	#define APCH_STATE_CSTATE_EOC 0x01
74	#define APCH_STATE_CSTATE_FAST 0x02
75	#define APCH_STATE_CSTATE_PRE 0x03
76
77	struct act8945a_charger {
78	struct regmap *regmap;
5c0e09e0 WY	79	};
	80
	81	static int act8945a_get_charger_state(struct regmap regmap, int val)
	82	{
	83	int ret;
	84	unsigned int status, state;
	85
	86	ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
	87	if (ret < 0)
	88	return ret;
	89
	90	ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
	91	if (ret < 0)
	92	return ret;
	93
	94	state &= APCH_STATE_CSTATE;
	95	state >>= APCH_STATE_CSTATE_SHIFT;
	96
1f0ba406 WY	97	switch (state) {
	98	case APCH_STATE_CSTATE_PRE:
	99	case APCH_STATE_CSTATE_FAST:
	100	*val = POWER_SUPPLY_STATUS_CHARGING;
	101	break;
	102	case APCH_STATE_CSTATE_EOC:
5c0e09e0 WY	103	if (status & APCH_STATUS_CHGDAT)
5c0e09e0 WY	104	*val = POWER_SUPPLY_STATUS_FULL;
1f0ba406 WY	105	else
	106	*val = POWER_SUPPLY_STATUS_CHARGING;
	107	break;
	108	case APCH_STATE_CSTATE_DISABLED:
	109	default:
	110	if (!(status & APCH_STATUS_INDAT))
	111	*val = POWER_SUPPLY_STATUS_DISCHARGING;
5c0e09e0 WY	112	else
5c0e09e0 WY	113	*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
1f0ba406	114	break;
5c0e09e0 WY	115	}
	116
	117	return 0;
	118	}
	119
	120	static int act8945a_get_charge_type(struct regmap regmap, int val)
	121	{
	122	int ret;
1f0ba406 WY	123	unsigned int status, state;
	124
	125	ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
	126	if (ret < 0)
	127	return ret;
5c0e09e0 WY	128
	129	ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
	130	if (ret < 0)
	131	return ret;
	132
	133	state &= APCH_STATE_CSTATE;
	134	state >>= APCH_STATE_CSTATE_SHIFT;
	135
	136	switch (state) {
	137	case APCH_STATE_CSTATE_PRE:
	138	*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
	139	break;
	140	case APCH_STATE_CSTATE_FAST:
	141	*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
	142	break;
	143	case APCH_STATE_CSTATE_EOC:
1f0ba406 WY	144	*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
1f0ba406 WY	145	break;
5c0e09e0 WY	146	case APCH_STATE_CSTATE_DISABLED:
5c0e09e0 WY	147	default:
1f0ba406 WY	148	if (!(status & APCH_STATUS_INDAT))
	149	*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
	150	else
	151	*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
	152	break;
5c0e09e0 WY	153	}
	154
	155	return 0;
	156	}
	157
6b021fc9	158	static int act8945a_get_battery_health(struct regmap regmap, int val)
5c0e09e0 WY	159	{
5c0e09e0 WY	160	int ret;
1f0ba406	161	unsigned int status, state, config;
5c0e09e0 WY	162
	163	ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
	164	if (ret < 0)
	165	return ret;
	166
1f0ba406 WY	167	ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
	168	if (ret < 0)
	169	return ret;
	170
	171	ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
	172	if (ret < 0)
	173	return ret;
	174
	175	state &= APCH_STATE_CSTATE;
	176	state >>= APCH_STATE_CSTATE_SHIFT;
	177
	178	switch (state) {
	179	case APCH_STATE_CSTATE_DISABLED:
	180	if (config & APCH_CFG_SUSCHG) {
	181	*val = POWER_SUPPLY_HEALTH_UNKNOWN;
	182	} else if (status & APCH_STATUS_INDAT) {
	183	if (!(status & APCH_STATUS_TEMPDAT))
	184	*val = POWER_SUPPLY_HEALTH_OVERHEAT;
	185	else if (status & APCH_STATUS_TIMRDAT)
	186	*val = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
	187	else
	188	*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
	189	} else {
	190	*val = POWER_SUPPLY_HEALTH_GOOD;
	191	}
	192	break;
	193	case APCH_STATE_CSTATE_PRE:
	194	case APCH_STATE_CSTATE_FAST:
	195	case APCH_STATE_CSTATE_EOC:
	196	default:
5c0e09e0	197	*val = POWER_SUPPLY_HEALTH_GOOD;
1f0ba406 WY	198	break;
1f0ba406 WY	199	}
5c0e09e0 WY	200
	201	return 0;
	202	}
	203
	204	static enum power_supply_property act8945a_charger_props[] = {
	205	POWER_SUPPLY_PROP_STATUS,
	206	POWER_SUPPLY_PROP_CHARGE_TYPE,
	207	POWER_SUPPLY_PROP_TECHNOLOGY,
	208	POWER_SUPPLY_PROP_HEALTH,
	209	POWER_SUPPLY_PROP_MODEL_NAME,
	210	POWER_SUPPLY_PROP_MANUFACTURER
	211	};
	212
	213	static int act8945a_charger_get_property(struct power_supply *psy,
	214	enum power_supply_property prop,
	215	union power_supply_propval *val)
	216	{
	217	struct act8945a_charger *charger = power_supply_get_drvdata(psy);
	218	struct regmap *regmap = charger->regmap;
	219	int ret = 0;
	220
	221	switch (prop) {
	222	case POWER_SUPPLY_PROP_STATUS:
	223	ret = act8945a_get_charger_state(regmap, &val->intval);
	224	break;
	225	case POWER_SUPPLY_PROP_CHARGE_TYPE:
	226	ret = act8945a_get_charge_type(regmap, &val->intval);
	227	break;
	228	case POWER_SUPPLY_PROP_TECHNOLOGY:
	229	val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
	230	break;
	231	case POWER_SUPPLY_PROP_HEALTH:
6b021fc9	232	ret = act8945a_get_battery_health(regmap, &val->intval);
5c0e09e0 WY	233	break;
	234	case POWER_SUPPLY_PROP_MODEL_NAME:
	235	val->strval = act8945a_charger_model;
	236	break;
	237	case POWER_SUPPLY_PROP_MANUFACTURER:
	238	val->strval = act8945a_charger_manufacturer;
	239	break;
	240	default:
	241	return -EINVAL;
	242	}
	243
	244	return ret;
	245	}
	246
	247	static const struct power_supply_desc act8945a_charger_desc = {
	248	.name = "act8945a-charger",
	249	.type = POWER_SUPPLY_TYPE_BATTERY,
	250	.get_property = act8945a_charger_get_property,
	251	.properties = act8945a_charger_props,
	252	.num_properties = ARRAY_SIZE(act8945a_charger_props),
	253	};
	254
	255	#define DEFAULT_TOTAL_TIME_OUT 3
	256	#define DEFAULT_PRE_TIME_OUT 40
	257	#define DEFAULT_INPUT_OVP_THRESHOLD 6600
	258
	259	static int act8945a_charger_config(struct device *dev,
	260	struct act8945a_charger *charger)
	261	{
	262	struct device_node *np = dev->of_node;
	263	enum of_gpio_flags flags;
	264	struct regmap *regmap = charger->regmap;
	265
	266	u32 total_time_out;
	267	u32 pre_time_out;
	268	u32 input_voltage_threshold;
	269	int chglev_pin;
1f0ba406	270	int ret;
5c0e09e0	271
1f0ba406	272	unsigned int tmp;
5c0e09e0 WY	273	unsigned int value = 0;
	274
	275	if (!np) {
	276	dev_err(dev, "no charger of node\n");
	277	return -EINVAL;
	278	}
	279
1f0ba406 WY	280	ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp);
	281	if (ret)
	282	return ret;
	283
	284	if (tmp & APCH_CFG_SUSCHG) {
	285	value \|= APCH_CFG_SUSCHG;
	286	dev_info(dev, "have been suspended\n");
	287	}
	288
5c0e09e0 WY	289	chglev_pin = of_get_named_gpio_flags(np,
	290	"active-semi,chglev-gpios", 0, &flags);
	291
	292	if (gpio_is_valid(chglev_pin)) {
	293	gpio_set_value(chglev_pin,
	294	((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1));
	295	}
	296
	297	if (of_property_read_u32(np,
	298	"active-semi,input-voltage-threshold-microvolt",
	299	&input_voltage_threshold))
	300	input_voltage_threshold = DEFAULT_INPUT_OVP_THRESHOLD;
	301
	302	if (of_property_read_u32(np,
	303	"active-semi,precondition-timeout",
	304	&pre_time_out))
	305	pre_time_out = DEFAULT_PRE_TIME_OUT;
	306
	307	if (of_property_read_u32(np, "active-semi,total-timeout",
	308	&total_time_out))
	309	total_time_out = DEFAULT_TOTAL_TIME_OUT;
	310
	311	switch (input_voltage_threshold) {
	312	case 8000:
	313	value \|= APCH_CFG_OVPSET_8V;
	314	break;
	315	case 7500:
	316	value \|= APCH_CFG_OVPSET_7V5;
	317	break;
	318	case 7000:
	319	value \|= APCH_CFG_OVPSET_7V;
	320	break;
	321	case 6600:
	322	default:
	323	value \|= APCH_CFG_OVPSET_6V6;
	324	break;
	325	}
	326
	327	switch (pre_time_out) {
	328	case 60:
	329	value \|= APCH_CFG_PRETIMO_60_MIN;
	330	break;
	331	case 80:
	332	value \|= APCH_CFG_PRETIMO_80_MIN;
	333	break;
	334	case 0:
	335	value \|= APCH_CFG_PRETIMO_DISABLED;
	336	break;
	337	case 40:
	338	default:
	339	value \|= APCH_CFG_PRETIMO_40_MIN;
	340	break;
	341	}
	342
	343	switch (total_time_out) {
	344	case 4:
	345	value \|= APCH_CFG_TOTTIMO_4_HOUR;
	346	break;
	347	case 5:
	348	value \|= APCH_CFG_TOTTIMO_5_HOUR;
	349	break;
	350	case 0:
	351	value \|= APCH_CFG_TOTTIMO_DISABLED;
	352	break;
353	case 3:
354	default:
355	value \|= APCH_CFG_TOTTIMO_3_HOUR;
356	break;
357	}
358
359	return regmap_write(regmap, ACT8945A_APCH_CFG, value);
360	}
361
362	static int act8945a_charger_probe(struct platform_device *pdev)
363	{
364	struct act8945a_charger *charger;
365	struct power_supply *psy;
366	struct power_supply_config psy_cfg = {};
367	int ret;
368
369	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
370	if (!charger)
371	return -ENOMEM;
372
373	charger->regmap = dev_get_regmap(pdev->dev.parent, NULL);
374	if (!charger->regmap) {
375	dev_err(&pdev->dev, "Parent did not provide regmap\n");
376	return -EINVAL;
377	}
378
5da643b2	379	ret = act8945a_charger_config(&pdev->dev, charger);
5c0e09e0 WY	380	if (ret)
	381	return ret;
	382
5da643b2	383	psy_cfg.of_node = pdev->dev.of_node;
5c0e09e0 WY	384	psy_cfg.drv_data = charger;
	385
	386	psy = devm_power_supply_register(&pdev->dev,
	387	&act8945a_charger_desc,
	388	&psy_cfg);
	389	if (IS_ERR(psy)) {
	390	dev_err(&pdev->dev, "failed to register power supply\n");
	391	return PTR_ERR(psy);
	392	}
	393
	394	return 0;
	395	}
	396
	397	static struct platform_driver act8945a_charger_driver = {
	398	.driver = {
	399	.name = "act8945a-charger",
	400	},
	401	.probe = act8945a_charger_probe,
	402	};
	403	module_platform_driver(act8945a_charger_driver);
	404
	405	MODULE_DESCRIPTION("Active-semi ACT8945A ActivePath charger driver");
	406	MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
	407	MODULE_LICENSE("GPL");