[linux-2.6-block.git] / drivers / power / supply / rt5033_battery.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Fuel gauge driver for Richtek RT5033
 *
 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
 * Author: Beomho Seo <beomho.seo@samsung.com>
 */

#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/mfd/rt5033-private.h>

struct rt5033_battery {
	struct i2c_client	*client;
	struct regmap		*regmap;
	struct power_supply	*psy;
};

static int rt5033_battery_get_status(struct i2c_client *client)
{
	struct rt5033_battery *battery = i2c_get_clientdata(client);
	union power_supply_propval val;
	int ret;

	ret = power_supply_get_property_from_supplier(battery->psy,
						POWER_SUPPLY_PROP_STATUS,
						&val);
	if (ret)
		val.intval = POWER_SUPPLY_STATUS_UNKNOWN;

	return val.intval;
}

static int rt5033_battery_get_capacity(struct i2c_client *client)
{
	struct rt5033_battery *battery = i2c_get_clientdata(client);
	u32 msb;

	regmap_read(battery->regmap, RT5033_FUEL_REG_SOC_H, &msb);

	return msb;
}

static int rt5033_battery_get_present(struct i2c_client *client)
{
	struct rt5033_battery *battery = i2c_get_clientdata(client);
	u32 val;

	regmap_read(battery->regmap, RT5033_FUEL_REG_CONFIG_L, &val);

	return (val & RT5033_FUEL_BAT_PRESENT) ? true : false;
}

static int rt5033_battery_get_watt_prop(struct i2c_client *client,
		enum power_supply_property psp)
{
	struct rt5033_battery *battery = i2c_get_clientdata(client);
	unsigned int regh, regl;
	int ret;
	u32 msb, lsb;

	switch (psp) {
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		regh = RT5033_FUEL_REG_VBAT_H;
		regl = RT5033_FUEL_REG_VBAT_L;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
		regh = RT5033_FUEL_REG_AVG_VOLT_H;
		regl = RT5033_FUEL_REG_AVG_VOLT_L;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
		regh = RT5033_FUEL_REG_OCV_H;
		regl = RT5033_FUEL_REG_OCV_L;
		break;
	default:
		return -EINVAL;
	}

	regmap_read(battery->regmap, regh, &msb);
	regmap_read(battery->regmap, regl, &lsb);

	ret = ((msb << 4) + (lsb >> 4)) * 1250;

	return ret;
}

static int rt5033_battery_get_property(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct rt5033_battery *battery = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
		val->intval = rt5033_battery_get_watt_prop(battery->client,
									psp);
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = rt5033_battery_get_present(battery->client);
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		val->intval = rt5033_battery_get_capacity(battery->client);
		break;
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = rt5033_battery_get_status(battery->client);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static enum power_supply_property rt5033_battery_props[] = {
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_AVG,
	POWER_SUPPLY_PROP_VOLTAGE_OCV,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_STATUS,
};

static const struct regmap_config rt5033_battery_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.max_register	= RT5033_FUEL_REG_END,
};

static const struct power_supply_desc rt5033_battery_desc = {
	.name		= "rt5033-battery",
	.type		= POWER_SUPPLY_TYPE_BATTERY,
	.get_property	= rt5033_battery_get_property,
	.properties	= rt5033_battery_props,
	.num_properties	= ARRAY_SIZE(rt5033_battery_props),
};

static int rt5033_battery_probe(struct i2c_client *client)
{
	struct i2c_adapter *adapter = client->adapter;
	struct power_supply_config psy_cfg = {};
	struct rt5033_battery *battery;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
		return -EIO;

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

	battery->client = client;
	battery->regmap = devm_regmap_init_i2c(client,
			&rt5033_battery_regmap_config);
	if (IS_ERR(battery->regmap)) {
		dev_err(&client->dev, "Failed to initialize regmap\n");
		return -EINVAL;
	}

	i2c_set_clientdata(client, battery);
	psy_cfg.of_node = client->dev.of_node;
	psy_cfg.drv_data = battery;

	battery->psy = devm_power_supply_register(&client->dev,
						  &rt5033_battery_desc,
						  &psy_cfg);
	if (IS_ERR(battery->psy))
		return dev_err_probe(&client->dev, PTR_ERR(battery->psy),
				     "Failed to register power supply\n");

	return 0;
}

static const struct i2c_device_id rt5033_battery_id[] = {
	{ "rt5033-battery", },
	{ }
};
MODULE_DEVICE_TABLE(i2c, rt5033_battery_id);

static const struct of_device_id rt5033_battery_of_match[] = {
	{ .compatible = "richtek,rt5033-battery", },
	{ }
};
MODULE_DEVICE_TABLE(of, rt5033_battery_of_match);

static struct i2c_driver rt5033_battery_driver = {
	.driver = {
		.name = "rt5033-battery",
		.of_match_table = rt5033_battery_of_match,
	},
	.probe = rt5033_battery_probe,
	.id_table = rt5033_battery_id,
};
module_i2c_driver(rt5033_battery_driver);

MODULE_DESCRIPTION("Richtek RT5033 fuel gauge driver");
MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
d925da5c	1	// SPDX-License-Identifier: GPL-2.0-only
b847dd96 BS	2	/*
	3	* Fuel gauge driver for Richtek RT5033
	4	*
	5	* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
	6	* Author: Beomho Seo <beomho.seo@samsung.com>
b847dd96 BS	7	*/
b847dd96 BS	8
49b43590	9	#include <linux/i2c.h>
b847dd96 BS	10	#include <linux/module.h>
	11	#include <linux/platform_device.h>
	12	#include <linux/power_supply.h>
49b43590	13	#include <linux/regmap.h>
b847dd96	14	#include <linux/mfd/rt5033-private.h>
49b43590 JH	15
	16	struct rt5033_battery {
	17	struct i2c_client *client;
	18	struct regmap *regmap;
	19	struct power_supply *psy;
	20	};
b847dd96	21
4ed21f06 JH	22	static int rt5033_battery_get_status(struct i2c_client *client)
	23	{
	24	struct rt5033_battery *battery = i2c_get_clientdata(client);
	25	union power_supply_propval val;
	26	int ret;
	27
	28	ret = power_supply_get_property_from_supplier(battery->psy,
	29	POWER_SUPPLY_PROP_STATUS,
	30	&val);
	31	if (ret)
	32	val.intval = POWER_SUPPLY_STATUS_UNKNOWN;
	33
	34	return val.intval;
	35	}
	36
b847dd96 BS	37	static int rt5033_battery_get_capacity(struct i2c_client *client)
	38	{
	39	struct rt5033_battery *battery = i2c_get_clientdata(client);
	40	u32 msb;
	41
	42	regmap_read(battery->regmap, RT5033_FUEL_REG_SOC_H, &msb);
	43
	44	return msb;
	45	}
	46
	47	static int rt5033_battery_get_present(struct i2c_client *client)
	48	{
	49	struct rt5033_battery *battery = i2c_get_clientdata(client);
	50	u32 val;
	51
	52	regmap_read(battery->regmap, RT5033_FUEL_REG_CONFIG_L, &val);
	53
	54	return (val & RT5033_FUEL_BAT_PRESENT) ? true : false;
	55	}
	56
	57	static int rt5033_battery_get_watt_prop(struct i2c_client *client,
	58	enum power_supply_property psp)
	59	{
	60	struct rt5033_battery *battery = i2c_get_clientdata(client);
	61	unsigned int regh, regl;
	62	int ret;
	63	u32 msb, lsb;
	64
	65	switch (psp) {
	66	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	67	regh = RT5033_FUEL_REG_VBAT_H;
	68	regl = RT5033_FUEL_REG_VBAT_L;
	69	break;
	70	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
	71	regh = RT5033_FUEL_REG_AVG_VOLT_H;
	72	regl = RT5033_FUEL_REG_AVG_VOLT_L;
	73	break;
	74	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
	75	regh = RT5033_FUEL_REG_OCV_H;
	76	regl = RT5033_FUEL_REG_OCV_L;
	77	break;
	78	default:
	79	return -EINVAL;
	80	}
	81
	82	regmap_read(battery->regmap, regh, &msb);
	83	regmap_read(battery->regmap, regl, &lsb);
	84
bf895295	85	ret = ((msb << 4) + (lsb >> 4)) * 1250;
b847dd96 BS	86
	87	return ret;
	88	}
	89
	90	static int rt5033_battery_get_property(struct power_supply *psy,
	91	enum power_supply_property psp,
	92	union power_supply_propval *val)
	93	{
297d716f	94	struct rt5033_battery *battery = power_supply_get_drvdata(psy);
b847dd96 BS	95
	96	switch (psp) {
	97	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	98	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
	99	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
	100	val->intval = rt5033_battery_get_watt_prop(battery->client,
	101	psp);
	102	break;
	103	case POWER_SUPPLY_PROP_PRESENT:
	104	val->intval = rt5033_battery_get_present(battery->client);
	105	break;
	106	case POWER_SUPPLY_PROP_CAPACITY:
	107	val->intval = rt5033_battery_get_capacity(battery->client);
	108	break;
4ed21f06 JH	109	case POWER_SUPPLY_PROP_STATUS:
	110	val->intval = rt5033_battery_get_status(battery->client);
	111	break;
b847dd96 BS	112	default:
	113	return -EINVAL;
	114	}
	115	return 0;
	116	}
	117
	118	static enum power_supply_property rt5033_battery_props[] = {
	119	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	120	POWER_SUPPLY_PROP_VOLTAGE_AVG,
	121	POWER_SUPPLY_PROP_VOLTAGE_OCV,
	122	POWER_SUPPLY_PROP_PRESENT,
	123	POWER_SUPPLY_PROP_CAPACITY,
4ed21f06	124	POWER_SUPPLY_PROP_STATUS,
b847dd96 BS	125	};
b847dd96 BS	126
65ce1c95	127	static const struct regmap_config rt5033_battery_regmap_config = {
b847dd96 BS	128	.reg_bits = 8,
	129	.val_bits = 8,
	130	.max_register = RT5033_FUEL_REG_END,
	131	};
	132
297d716f KK	133	static const struct power_supply_desc rt5033_battery_desc = {
	134	.name = "rt5033-battery",
	135	.type = POWER_SUPPLY_TYPE_BATTERY,
	136	.get_property = rt5033_battery_get_property,
	137	.properties = rt5033_battery_props,
	138	.num_properties = ARRAY_SIZE(rt5033_battery_props),
	139	};
	140
f40ec8bc	141	static int rt5033_battery_probe(struct i2c_client *client)
b847dd96	142	{
df324c60	143	struct i2c_adapter *adapter = client->adapter;
297d716f	144	struct power_supply_config psy_cfg = {};
b847dd96	145	struct rt5033_battery *battery;
b847dd96 BS	146
	147	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
	148	return -EIO;
	149
	150	battery = devm_kzalloc(&client->dev, sizeof(*battery), GFP_KERNEL);
	151	if (!battery)
466bf931	152	return -ENOMEM;
b847dd96 BS	153
	154	battery->client = client;
	155	battery->regmap = devm_regmap_init_i2c(client,
	156	&rt5033_battery_regmap_config);
	157	if (IS_ERR(battery->regmap)) {
	158	dev_err(&client->dev, "Failed to initialize regmap\n");
	159	return -EINVAL;
	160	}
	161
d3911f16	162	i2c_set_clientdata(client, battery);
4ed21f06	163	psy_cfg.of_node = client->dev.of_node;
297d716f	164	psy_cfg.drv_data = battery;
b847dd96	165
3a93da23 AD	166	battery->psy = devm_power_supply_register(&client->dev,
	167	&rt5033_battery_desc,
	168	&psy_cfg);
4ed21f06 JH	169	if (IS_ERR(battery->psy))
	170	return dev_err_probe(&client->dev, PTR_ERR(battery->psy),
	171	"Failed to register power supply\n");
b847dd96 BS	172
	173	return 0;
	174	}
	175
b847dd96 BS	176	static const struct i2c_device_id rt5033_battery_id[] = {
	177	{ "rt5033-battery", },
	178	{ }
	179	};
63369b2b	180	MODULE_DEVICE_TABLE(i2c, rt5033_battery_id);
b847dd96	181
f3076cd8 SG	182	static const struct of_device_id rt5033_battery_of_match[] = {
	183	{ .compatible = "richtek,rt5033-battery", },
	184	{ }
	185	};
	186	MODULE_DEVICE_TABLE(of, rt5033_battery_of_match);
	187
b847dd96 BS	188	static struct i2c_driver rt5033_battery_driver = {
	189	.driver = {
	190	.name = "rt5033-battery",
f3076cd8	191	.of_match_table = rt5033_battery_of_match,
b847dd96	192	},
fe20b1dc	193	.probe = rt5033_battery_probe,
b847dd96 BS	194	.id_table = rt5033_battery_id,
	195	};
	196	module_i2c_driver(rt5033_battery_driver);
	197
	198	MODULE_DESCRIPTION("Richtek RT5033 fuel gauge driver");
	199	MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
	200	MODULE_LICENSE("GPL");