[linux-2.6-block.git] / drivers / power / max14577_charger.c

/*
 * max14577_charger.c - Battery charger driver for the Maxim 14577/77836
 *
 * Copyright (C) 2013,2014 Samsung Electronics
 * Krzysztof Kozlowski <k.kozlowski@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/max14577-private.h>
#include <linux/mfd/max14577.h>

struct max14577_charger {
	struct device		*dev;
	struct max14577		*max14577;
	struct power_supply	*charger;

	struct max14577_charger_platform_data	*pdata;
};

/*
 * Helper function for mapping values of STATUS2/CHGTYP register on max14577
 * and max77836 chipsets to enum maxim_muic_charger_type.
 */
static enum max14577_muic_charger_type maxim_get_charger_type(
		enum maxim_device_type dev_type, u8 val) {
	switch (val) {
	case MAX14577_CHARGER_TYPE_NONE:
	case MAX14577_CHARGER_TYPE_USB:
	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
		return val;
	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
	case MAX14577_CHARGER_TYPE_RESERVED:
		if (dev_type == MAXIM_DEVICE_TYPE_MAX77836)
			val |= 0x8;
		return val;
	default:
		WARN_ONCE(1, "max14577: Unsupported chgtyp register value 0x%02x", val);
		return val;
	}
}

static int max14577_get_charger_state(struct max14577_charger *chg, int *val)
{
	struct regmap *rmap = chg->max14577->regmap;
	int ret;
	u8 reg_data;

	/*
	 * Charging occurs only if:
	 *  - CHGCTRL2/MBCHOSTEN == 1
	 *  - STATUS2/CGMBC == 1
	 *
	 * TODO:
	 *  - handle FULL after Top-off timer (EOC register may be off
	 *    and the charger won't be charging although MBCHOSTEN is on)
	 *  - handle properly dead-battery charging (respect timer)
	 *  - handle timers (fast-charge and prequal) /MBCCHGERR/
	 */
	ret = max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
	if (ret < 0)
		goto out;

	if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) {
		*val = POWER_SUPPLY_STATUS_DISCHARGING;
		goto out;
	}

	ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
	if (ret < 0)
		goto out;

	if (reg_data & STATUS3_CGMBC_MASK) {
		/* Charger or USB-cable is connected */
		if (reg_data & STATUS3_EOC_MASK)
			*val = POWER_SUPPLY_STATUS_FULL;
		else
			*val = POWER_SUPPLY_STATUS_CHARGING;
		goto out;
	}

	*val = POWER_SUPPLY_STATUS_DISCHARGING;

out:
	return ret;
}

/*
 * Supported charge types:
 *  - POWER_SUPPLY_CHARGE_TYPE_NONE
 *  - POWER_SUPPLY_CHARGE_TYPE_FAST
 */
static int max14577_get_charge_type(struct max14577_charger *chg, int *val)
{
	int ret, charging;

	/*
	 * TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
	 * As spec says:
	 * [after reaching EOC interrupt]
	 * "When the battery is fully charged, the 30-minute (typ)
	 *  top-off timer starts. The device continues to trickle
	 *  charge the battery until the top-off timer runs out."
	 */
	ret = max14577_get_charger_state(chg, &charging);
	if (ret < 0)
		return ret;

	if (charging == POWER_SUPPLY_STATUS_CHARGING)
		*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
	else
		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;

	return 0;
}

static int max14577_get_online(struct max14577_charger *chg, int *val)
{
	struct regmap *rmap = chg->max14577->regmap;
	u8 reg_data;
	int ret;
	enum max14577_muic_charger_type chg_type;

	ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
	if (ret < 0)
		return ret;

	reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
	chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
	switch (chg_type) {
	case MAX14577_CHARGER_TYPE_USB:
	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
	case MAX77836_CHARGER_TYPE_SPECIAL_BIAS:
		*val = 1;
		break;
	case MAX14577_CHARGER_TYPE_NONE:
	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
	case MAX14577_CHARGER_TYPE_RESERVED:
	case MAX77836_CHARGER_TYPE_RESERVED:
	default:
		*val = 0;
	}

	return 0;
}

/*
 * Supported health statuses:
 *  - POWER_SUPPLY_HEALTH_DEAD
 *  - POWER_SUPPLY_HEALTH_OVERVOLTAGE
 *  - POWER_SUPPLY_HEALTH_GOOD
 */
static int max14577_get_battery_health(struct max14577_charger *chg, int *val)
{
	struct regmap *rmap = chg->max14577->regmap;
	int ret;
	u8 reg_data;
	enum max14577_muic_charger_type chg_type;

	ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
	if (ret < 0)
		goto out;

	reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
	chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
	if (chg_type == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
		*val = POWER_SUPPLY_HEALTH_DEAD;
		goto out;
	}

	ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
	if (ret < 0)
		goto out;

	if (reg_data & STATUS3_OVP_MASK) {
		*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		goto out;
	}

	/* Not dead, not overvoltage */
	*val = POWER_SUPPLY_HEALTH_GOOD;

out:
	return ret;
}

/*
 * Always returns 1.
 * The max14577 chip doesn't report any status of battery presence.
 * Lets assume that it will always be used with some battery.
 */
static int max14577_get_present(struct max14577_charger *chg, int *val)
{
	*val = 1;

	return 0;
}

static int max14577_set_fast_charge_timer(struct max14577_charger *chg,
		unsigned long hours)
{
	u8 reg_data;

	switch (hours) {
	case 5 ... 7:
		reg_data = hours - 3;
		break;
	case 0:
		/* Disable */
		reg_data = 0x7;
		break;
	default:
		dev_err(chg->dev, "Wrong value for Fast-Charge Timer: %lu\n",
				hours);
		return -EINVAL;
	}
	reg_data <<= CHGCTRL1_TCHW_SHIFT;

	return max14577_update_reg(chg->max14577->regmap,
			MAX14577_REG_CHGCTRL1, CHGCTRL1_TCHW_MASK, reg_data);
}

static int max14577_init_constant_voltage(struct max14577_charger *chg,
		unsigned int uvolt)
{
	u8 reg_data;

	if (uvolt < MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN ||
			uvolt > MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
		return -EINVAL;

	if (uvolt == 4200000)
		reg_data = 0x0;
	else if (uvolt == MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
		reg_data = 0x1f;
	else if (uvolt <= 4280000) {
		unsigned int val = uvolt;

		val -= MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN;
		val /= MAXIM_CHARGER_CONSTANT_VOLTAGE_STEP;
		if (uvolt <= 4180000)
			reg_data = 0x1 + val;
		else
			reg_data = val; /* Fix for gap between 4.18V and 4.22V */
	} else
		return -EINVAL;

	reg_data <<= CHGCTRL3_MBCCVWRC_SHIFT;

	return max14577_write_reg(chg->max14577->regmap,
			MAX14577_CHG_REG_CHG_CTRL3, reg_data);
}

static int max14577_init_eoc(struct max14577_charger *chg,
		unsigned int uamp)
{
	unsigned int current_bits = 0xf;
	u8 reg_data;

	switch (chg->max14577->dev_type) {
	case MAXIM_DEVICE_TYPE_MAX77836:
		if (uamp < 5000)
			return -EINVAL; /* Requested current is too low */

		if (uamp >= 7500 && uamp < 10000)
			current_bits = 0x0;
		else if (uamp <= 50000) {
			/* <5000, 7499> and <10000, 50000> */
			current_bits = uamp / 5000;
		} else {
			uamp = min(uamp, 100000U) - 50000U;
			current_bits = 0xa + uamp / 10000;
		}
		break;

	case MAXIM_DEVICE_TYPE_MAX14577:
	default:
		if (uamp < MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN)
			return -EINVAL; /* Requested current is too low */

		uamp = min(uamp, MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
		uamp -= MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN;
		current_bits = uamp / MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP;
		break;
	}

	reg_data = current_bits << CHGCTRL5_EOCS_SHIFT;

	return max14577_update_reg(chg->max14577->regmap,
			MAX14577_CHG_REG_CHG_CTRL5, CHGCTRL5_EOCS_MASK,
			reg_data);
}

static int max14577_init_fast_charge(struct max14577_charger *chg,
		unsigned int uamp)
{
	u8 reg_data;
	int ret;
	const struct maxim_charger_current *limits =
		&maxim_charger_currents[chg->max14577->dev_type];

	ret = maxim_charger_calc_reg_current(limits, uamp, uamp, &reg_data);
	if (ret) {
		dev_err(chg->dev, "Wrong value for fast charge: %u\n", uamp);
		return ret;
	}

	return max14577_update_reg(chg->max14577->regmap,
			MAX14577_CHG_REG_CHG_CTRL4,
			CHGCTRL4_MBCICHWRCL_MASK | CHGCTRL4_MBCICHWRCH_MASK,
			reg_data);
}

/*
 * Sets charger registers to proper and safe default values.
 * Some of these values are equal to defaults in MAX14577E
 * data sheet but there are minor differences.
 */
static int max14577_charger_reg_init(struct max14577_charger *chg)
{
	struct regmap *rmap = chg->max14577->regmap;
	u8 reg_data;
	int ret;

	/*
	 * Charger-Type Manual Detection, default off (set CHGTYPMAN to 0)
	 * Charger-Detection Enable, default on (set CHGDETEN to 1)
	 * Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit
	 */
	reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT;
	max14577_update_reg(rmap, MAX14577_REG_CDETCTRL1,
			CDETCTRL1_CHGDETEN_MASK | CDETCTRL1_CHGTYPMAN_MASK,
			reg_data);

	/*
	 * Wall-Adapter Rapid Charge, default on
	 * Battery-Charger, default on
	 */
	reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT;
	reg_data |= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT;
	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL2, reg_data);

	/* Auto Charging Stop, default off */
	reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT;
	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL6, reg_data);

	ret = max14577_init_constant_voltage(chg, chg->pdata->constant_uvolt);
	if (ret)
		return ret;

	ret = max14577_init_eoc(chg, chg->pdata->eoc_uamp);
	if (ret)
		return ret;

	ret = max14577_init_fast_charge(chg, chg->pdata->fast_charge_uamp);
	if (ret)
		return ret;

	ret = max14577_set_fast_charge_timer(chg,
			MAXIM_CHARGER_FAST_CHARGE_TIMER_DEFAULT);
	if (ret)
		return ret;

	/* Initialize Overvoltage-Protection Threshold */
	switch (chg->pdata->ovp_uvolt) {
	case 7500000:
		reg_data = 0x0;
		break;
	case 6000000:
	case 6500000:
	case 7000000:
		reg_data = 0x1 + (chg->pdata->ovp_uvolt - 6000000) / 500000;
		break;
	default:
		dev_err(chg->dev, "Wrong value for OVP: %u\n",
				chg->pdata->ovp_uvolt);
		return -EINVAL;
	}
	reg_data <<= CHGCTRL7_OTPCGHCVS_SHIFT;
	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL7, reg_data);

	return 0;
}

/* Support property from charger */
static enum power_supply_property max14577_charger_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_CHARGE_TYPE,
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_MANUFACTURER,
};

static const char * const model_names[] = {
	[MAXIM_DEVICE_TYPE_UNKNOWN]	= "MAX14577-like",
	[MAXIM_DEVICE_TYPE_MAX14577]	= "MAX14577",
	[MAXIM_DEVICE_TYPE_MAX77836]	= "MAX77836",
};
static const char *manufacturer = "Maxim Integrated";

static int max14577_charger_get_property(struct power_supply *psy,
			    enum power_supply_property psp,
			    union power_supply_propval *val)
{
	struct max14577_charger *chg = power_supply_get_drvdata(psy);
	int ret = 0;

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		ret = max14577_get_charger_state(chg, &val->intval);
		break;
	case POWER_SUPPLY_PROP_CHARGE_TYPE:
		ret = max14577_get_charge_type(chg, &val->intval);
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		ret = max14577_get_battery_health(chg, &val->intval);
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		ret = max14577_get_present(chg, &val->intval);
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		ret = max14577_get_online(chg, &val->intval);
		break;
	case POWER_SUPPLY_PROP_MODEL_NAME:
		BUILD_BUG_ON(ARRAY_SIZE(model_names) != MAXIM_DEVICE_TYPE_NUM);
		val->strval = model_names[chg->max14577->dev_type];
		break;
	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = manufacturer;
		break;
	default:
		return -EINVAL;
	}

	return ret;
}

static const struct power_supply_desc max14577_charger_desc = {
	.name = "max14577-charger",
	.type = POWER_SUPPLY_TYPE_BATTERY,
	.properties = max14577_charger_props,
	.num_properties = ARRAY_SIZE(max14577_charger_props),
	.get_property = max14577_charger_get_property,
};

#ifdef CONFIG_OF
static struct max14577_charger_platform_data *max14577_charger_dt_init(
		struct platform_device *pdev)
{
	struct max14577_charger_platform_data *pdata;
	struct device_node *np = pdev->dev.of_node;
	int ret;

	if (!np) {
		dev_err(&pdev->dev, "No charger OF node\n");
		return ERR_PTR(-EINVAL);
	}

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

	ret = of_property_read_u32(np, "maxim,constant-uvolt",
			&pdata->constant_uvolt);
	if (ret) {
		dev_err(&pdev->dev, "Cannot parse maxim,constant-uvolt field from DT\n");
		return ERR_PTR(ret);
	}

	ret = of_property_read_u32(np, "maxim,fast-charge-uamp",
			&pdata->fast_charge_uamp);
	if (ret) {
		dev_err(&pdev->dev, "Cannot parse maxim,fast-charge-uamp field from DT\n");
		return ERR_PTR(ret);
	}

	ret = of_property_read_u32(np, "maxim,eoc-uamp", &pdata->eoc_uamp);
	if (ret) {
		dev_err(&pdev->dev, "Cannot parse maxim,eoc-uamp field from DT\n");
		return ERR_PTR(ret);
	}

	ret = of_property_read_u32(np, "maxim,ovp-uvolt", &pdata->ovp_uvolt);
	if (ret) {
		dev_err(&pdev->dev, "Cannot parse maxim,ovp-uvolt field from DT\n");
		return ERR_PTR(ret);
	}

	return pdata;
}
#else /* CONFIG_OF */
static struct max14577_charger_platform_data *max14577_charger_dt_init(
		struct platform_device *pdev)
{
	return NULL;
}
#endif /* CONFIG_OF */

static ssize_t show_fast_charge_timer(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	struct max14577_charger *chg = dev_get_drvdata(dev);
	u8 reg_data;
	int ret;
	unsigned int val;

	ret = max14577_read_reg(chg->max14577->regmap, MAX14577_REG_CHGCTRL1,
			&reg_data);
	if (ret)
		return ret;

	reg_data &= CHGCTRL1_TCHW_MASK;
	reg_data >>= CHGCTRL1_TCHW_SHIFT;
	switch (reg_data) {
	case 0x2 ... 0x4:
		val = reg_data + 3;
		break;
	case 0x7:
		val = 0;
		break;
	default:
		val = 5;
		break;
	}

	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
}

static ssize_t store_fast_charge_timer(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct max14577_charger *chg = dev_get_drvdata(dev);
	unsigned long val;
	int ret;

	ret = kstrtoul(buf, 10, &val);
	if (ret)
		return ret;

	ret = max14577_set_fast_charge_timer(chg, val);
	if (ret)
		return ret;

	return count;
}

static DEVICE_ATTR(fast_charge_timer, S_IRUGO | S_IWUSR,
		show_fast_charge_timer, store_fast_charge_timer);

static int max14577_charger_probe(struct platform_device *pdev)
{
	struct max14577_charger *chg;
	struct power_supply_config psy_cfg = {};
	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
	int ret;

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

	platform_set_drvdata(pdev, chg);
	chg->dev = &pdev->dev;
	chg->max14577 = max14577;

	chg->pdata = max14577_charger_dt_init(pdev);
	if (IS_ERR_OR_NULL(chg->pdata))
		return PTR_ERR(chg->pdata);

	ret = max14577_charger_reg_init(chg);
	if (ret)
		return ret;

	ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer);
	if (ret) {
		dev_err(&pdev->dev, "failed: create sysfs entry\n");
		return ret;
	}

	psy_cfg.drv_data = chg;
	chg->charger = power_supply_register(&pdev->dev, &max14577_charger_desc,
						&psy_cfg);
	if (IS_ERR(chg->charger)) {
		dev_err(&pdev->dev, "failed: power supply register\n");
		ret = PTR_ERR(chg->charger);
		goto err;
	}

	/* Check for valid values for charger */
	BUILD_BUG_ON(MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN +
			MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP * 0xf !=
			MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
	return 0;

err:
	device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);

	return ret;
}

static int max14577_charger_remove(struct platform_device *pdev)
{
	struct max14577_charger *chg = platform_get_drvdata(pdev);

	device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
	power_supply_unregister(chg->charger);

	return 0;
}

static const struct platform_device_id max14577_charger_id[] = {
	{ "max14577-charger", MAXIM_DEVICE_TYPE_MAX14577, },
	{ "max77836-charger", MAXIM_DEVICE_TYPE_MAX77836, },
	{ }
};
MODULE_DEVICE_TABLE(platform, max14577_charger_id);

static struct platform_driver max14577_charger_driver = {
	.driver = {
		.name	= "max14577-charger",
	},
	.probe		= max14577_charger_probe,
	.remove		= max14577_charger_remove,
	.id_table	= max14577_charger_id,
};
module_platform_driver(max14577_charger_driver);

MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>");
MODULE_DESCRIPTION("Maxim 14577/77836 charger driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
55e64701	1	/*
3682a8ee	2	* max14577_charger.c - Battery charger driver for the Maxim 14577/77836
55e64701	3	*
3682a8ee	4	* Copyright (C) 2013,2014 Samsung Electronics
55e64701 KK	5	* Krzysztof Kozlowski <k.kozlowski@samsung.com>
	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 as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/power_supply.h>
	21	#include <linux/mfd/max14577-private.h>
e30110e9	22	#include <linux/mfd/max14577.h>
55e64701 KK	23
55e64701 KK	24	struct max14577_charger {
297d716f KK	25	struct device *dev;
	26	struct max14577 *max14577;
	27	struct power_supply *charger;
55e64701	28
e30110e9	29	struct max14577_charger_platform_data *pdata;
55e64701 KK	30	};
55e64701 KK	31
3682a8ee KK	32	/*
	33	* Helper function for mapping values of STATUS2/CHGTYP register on max14577
	34	* and max77836 chipsets to enum maxim_muic_charger_type.
	35	*/
	36	static enum max14577_muic_charger_type maxim_get_charger_type(
	37	enum maxim_device_type dev_type, u8 val) {
	38	switch (val) {
	39	case MAX14577_CHARGER_TYPE_NONE:
	40	case MAX14577_CHARGER_TYPE_USB:
	41	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
	42	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
	43	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
	44	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
	45	return val;
	46	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
	47	case MAX14577_CHARGER_TYPE_RESERVED:
	48	if (dev_type == MAXIM_DEVICE_TYPE_MAX77836)
	49	val \|= 0x8;
	50	return val;
	51	default:
	52	WARN_ONCE(1, "max14577: Unsupported chgtyp register value 0x%02x", val);
	53	return val;
	54	}
	55	}
	56
dd18a663	57	static int max14577_get_charger_state(struct max14577_charger chg, int val)
55e64701 KK	58	{
55e64701 KK	59	struct regmap *rmap = chg->max14577->regmap;
dd18a663	60	int ret;
55e64701 KK	61	u8 reg_data;
	62
	63	/*
	64	* Charging occurs only if:
	65	* - CHGCTRL2/MBCHOSTEN == 1
	66	* - STATUS2/CGMBC == 1
	67	*
	68	* TODO:
	69	* - handle FULL after Top-off timer (EOC register may be off
	70	* and the charger won't be charging although MBCHOSTEN is on)
	71	* - handle properly dead-battery charging (respect timer)
	72	* - handle timers (fast-charge and prequal) /MBCCHGERR/
	73	*/
dd18a663 KK	74	ret = max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
	75	if (ret < 0)
	76	goto out;
	77
	78	if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) {
	79	*val = POWER_SUPPLY_STATUS_DISCHARGING;
	80	goto out;
	81	}
	82
	83	ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
	84	if (ret < 0)
	85	goto out;
55e64701	86
55e64701 KK	87	if (reg_data & STATUS3_CGMBC_MASK) {
	88	/* Charger or USB-cable is connected */
	89	if (reg_data & STATUS3_EOC_MASK)
dd18a663	90	*val = POWER_SUPPLY_STATUS_FULL;
55e64701	91	else
dd18a663 KK	92	*val = POWER_SUPPLY_STATUS_CHARGING;
dd18a663 KK	93	goto out;
55e64701 KK	94	}
55e64701 KK	95
dd18a663 KK	96	*val = POWER_SUPPLY_STATUS_DISCHARGING;
	97
	98	out:
	99	return ret;
55e64701 KK	100	}
	101
	102	/*
	103	* Supported charge types:
	104	* - POWER_SUPPLY_CHARGE_TYPE_NONE
	105	* - POWER_SUPPLY_CHARGE_TYPE_FAST
	106	*/
dd18a663	107	static int max14577_get_charge_type(struct max14577_charger chg, int val)
55e64701	108	{
dd18a663 KK	109	int ret, charging;
dd18a663 KK	110
55e64701 KK	111	/*
	112	* TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
	113	* As spec says:
	114	* [after reaching EOC interrupt]
	115	* "When the battery is fully charged, the 30-minute (typ)
	116	* top-off timer starts. The device continues to trickle
	117	* charge the battery until the top-off timer runs out."
	118	*/
dd18a663 KK	119	ret = max14577_get_charger_state(chg, &charging);
	120	if (ret < 0)
	121	return ret;
	122
	123	if (charging == POWER_SUPPLY_STATUS_CHARGING)
	124	*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
	125	else
	126	*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
	127
	128	return 0;
55e64701 KK	129	}
55e64701 KK	130
dd18a663	131	static int max14577_get_online(struct max14577_charger chg, int val)
55e64701 KK	132	{
	133	struct regmap *rmap = chg->max14577->regmap;
	134	u8 reg_data;
dd18a663	135	int ret;
3682a8ee	136	enum max14577_muic_charger_type chg_type;
55e64701	137
dd18a663 KK	138	ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
	139	if (ret < 0)
	140	return ret;
	141
55e64701	142	reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
3682a8ee KK	143	chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
3682a8ee KK	144	switch (chg_type) {
55e64701 KK	145	case MAX14577_CHARGER_TYPE_USB:
	146	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
	147	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
	148	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
	149	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
3682a8ee	150	case MAX77836_CHARGER_TYPE_SPECIAL_BIAS:
dd18a663 KK	151	*val = 1;
dd18a663 KK	152	break;
55e64701 KK	153	case MAX14577_CHARGER_TYPE_NONE:
	154	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
	155	case MAX14577_CHARGER_TYPE_RESERVED:
3682a8ee	156	case MAX77836_CHARGER_TYPE_RESERVED:
55e64701	157	default:
dd18a663	158	*val = 0;
55e64701	159	}
dd18a663 KK	160
dd18a663 KK	161	return 0;
55e64701 KK	162	}
	163
	164	/*
	165	* Supported health statuses:
	166	* - POWER_SUPPLY_HEALTH_DEAD
	167	* - POWER_SUPPLY_HEALTH_OVERVOLTAGE
	168	* - POWER_SUPPLY_HEALTH_GOOD
	169	*/
dd18a663	170	static int max14577_get_battery_health(struct max14577_charger chg, int val)
55e64701 KK	171	{
55e64701 KK	172	struct regmap *rmap = chg->max14577->regmap;
dd18a663	173	int ret;
55e64701	174	u8 reg_data;
3682a8ee	175	enum max14577_muic_charger_type chg_type;
55e64701	176
dd18a663 KK	177	ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
	178	if (ret < 0)
	179	goto out;
	180
55e64701	181	reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
3682a8ee KK	182	chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
3682a8ee KK	183	if (chg_type == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
dd18a663 KK	184	*val = POWER_SUPPLY_HEALTH_DEAD;
dd18a663 KK	185	goto out;
55e64701 KK	186	}
55e64701 KK	187
dd18a663 KK	188	ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
	189	if (ret < 0)
	190	goto out;
	191
55e64701	192	if (reg_data & STATUS3_OVP_MASK) {
dd18a663 KK	193	*val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
dd18a663 KK	194	goto out;
55e64701 KK	195	}
55e64701 KK	196
dd18a663 KK	197	/* Not dead, not overvoltage */
	198	*val = POWER_SUPPLY_HEALTH_GOOD;
	199
	200	out:
	201	return ret;
55e64701 KK	202	}
	203
	204	/*
	205	* Always returns 1.
	206	* The max14577 chip doesn't report any status of battery presence.
	207	* Lets assume that it will always be used with some battery.
	208	*/
dd18a663	209	static int max14577_get_present(struct max14577_charger chg, int val)
55e64701	210	{
dd18a663 KK	211	*val = 1;
	212
	213	return 0;
55e64701 KK	214	}
55e64701 KK	215
e30110e9 KK	216	static int max14577_set_fast_charge_timer(struct max14577_charger *chg,
	217	unsigned long hours)
	218	{
	219	u8 reg_data;
	220
	221	switch (hours) {
	222	case 5 ... 7:
	223	reg_data = hours - 3;
	224	break;
	225	case 0:
	226	/* Disable */
	227	reg_data = 0x7;
	228	break;
	229	default:
	230	dev_err(chg->dev, "Wrong value for Fast-Charge Timer: %lu\n",
	231	hours);
	232	return -EINVAL;
	233	}
	234	reg_data <<= CHGCTRL1_TCHW_SHIFT;
	235
	236	return max14577_update_reg(chg->max14577->regmap,
	237	MAX14577_REG_CHGCTRL1, CHGCTRL1_TCHW_MASK, reg_data);
	238	}
	239
	240	static int max14577_init_constant_voltage(struct max14577_charger *chg,
	241	unsigned int uvolt)
	242	{
	243	u8 reg_data;
	244
	245	if (uvolt < MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN \|\|
	246	uvolt > MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
	247	return -EINVAL;
	248
	249	if (uvolt == 4200000)
	250	reg_data = 0x0;
	251	else if (uvolt == MAXIM_CHARGER_CONSTANT_VOLTAGE_MAX)
	252	reg_data = 0x1f;
	253	else if (uvolt <= 4280000) {
	254	unsigned int val = uvolt;
	255
	256	val -= MAXIM_CHARGER_CONSTANT_VOLTAGE_MIN;
	257	val /= MAXIM_CHARGER_CONSTANT_VOLTAGE_STEP;
	258	if (uvolt <= 4180000)
	259	reg_data = 0x1 + val;
	260	else
	261	reg_data = val; /* Fix for gap between 4.18V and 4.22V */
	262	} else
	263	return -EINVAL;
	264
	265	reg_data <<= CHGCTRL3_MBCCVWRC_SHIFT;
	266
	267	return max14577_write_reg(chg->max14577->regmap,
	268	MAX14577_CHG_REG_CHG_CTRL3, reg_data);
	269	}
	270
	271	static int max14577_init_eoc(struct max14577_charger *chg,
	272	unsigned int uamp)
	273	{
	274	unsigned int current_bits = 0xf;
	275	u8 reg_data;
	276
	277	switch (chg->max14577->dev_type) {
	278	case MAXIM_DEVICE_TYPE_MAX77836:
	279	if (uamp < 5000)
280	return -EINVAL; /* Requested current is too low */
281
282	if (uamp >= 7500 && uamp < 10000)
283	current_bits = 0x0;
284	else if (uamp <= 50000) {
285	/* <5000, 7499> and <10000, 50000> */
286	current_bits = uamp / 5000;
287	} else {
288	uamp = min(uamp, 100000U) - 50000U;
289	current_bits = 0xa + uamp / 10000;
290	}
291	break;
292
293	case MAXIM_DEVICE_TYPE_MAX14577:
294	default:
295	if (uamp < MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN)
296	return -EINVAL; /* Requested current is too low */
297
298	uamp = min(uamp, MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
299	uamp -= MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN;
300	current_bits = uamp / MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP;
301	break;
302	}
303
304	reg_data = current_bits << CHGCTRL5_EOCS_SHIFT;
305
306	return max14577_update_reg(chg->max14577->regmap,
307	MAX14577_CHG_REG_CHG_CTRL5, CHGCTRL5_EOCS_MASK,
308	reg_data);
309	}
310
311	static int max14577_init_fast_charge(struct max14577_charger *chg,
312	unsigned int uamp)
313	{
314	u8 reg_data;
315	int ret;
316	const struct maxim_charger_current *limits =
317	&maxim_charger_currents[chg->max14577->dev_type];
318
319	ret = maxim_charger_calc_reg_current(limits, uamp, uamp, &reg_data);
320	if (ret) {
321	dev_err(chg->dev, "Wrong value for fast charge: %u\n", uamp);
322	return ret;
323	}
324
325	return max14577_update_reg(chg->max14577->regmap,
326	MAX14577_CHG_REG_CHG_CTRL4,
327	CHGCTRL4_MBCICHWRCL_MASK \| CHGCTRL4_MBCICHWRCH_MASK,
328	reg_data);
329	}
330
55e64701 KK	331	/*
	332	* Sets charger registers to proper and safe default values.
	333	* Some of these values are equal to defaults in MAX14577E
	334	* data sheet but there are minor differences.
	335	*/
e30110e9	336	static int max14577_charger_reg_init(struct max14577_charger *chg)
55e64701 KK	337	{
	338	struct regmap *rmap = chg->max14577->regmap;
	339	u8 reg_data;
e30110e9	340	int ret;
55e64701 KK	341
	342	/*
	343	* Charger-Type Manual Detection, default off (set CHGTYPMAN to 0)
	344	* Charger-Detection Enable, default on (set CHGDETEN to 1)
	345	* Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit
	346	*/
	347	reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT;
	348	max14577_update_reg(rmap, MAX14577_REG_CDETCTRL1,
	349	CDETCTRL1_CHGDETEN_MASK \| CDETCTRL1_CHGTYPMAN_MASK,
	350	reg_data);
	351
55e64701 KK	352	/*
	353	* Wall-Adapter Rapid Charge, default on
	354	* Battery-Charger, default on
	355	*/
	356	reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT;
	357	reg_data \|= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT;
	358	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL2, reg_data);
	359
55e64701 KK	360	/* Auto Charging Stop, default off */
	361	reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT;
	362	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL6, reg_data);
	363
e30110e9 KK	364	ret = max14577_init_constant_voltage(chg, chg->pdata->constant_uvolt);
	365	if (ret)
	366	return ret;
	367
	368	ret = max14577_init_eoc(chg, chg->pdata->eoc_uamp);
	369	if (ret)
	370	return ret;
	371
	372	ret = max14577_init_fast_charge(chg, chg->pdata->fast_charge_uamp);
	373	if (ret)
	374	return ret;
	375
	376	ret = max14577_set_fast_charge_timer(chg,
	377	MAXIM_CHARGER_FAST_CHARGE_TIMER_DEFAULT);
	378	if (ret)
	379	return ret;
	380
	381	/* Initialize Overvoltage-Protection Threshold */
	382	switch (chg->pdata->ovp_uvolt) {
	383	case 7500000:
	384	reg_data = 0x0;
	385	break;
	386	case 6000000:
	387	case 6500000:
	388	case 7000000:
	389	reg_data = 0x1 + (chg->pdata->ovp_uvolt - 6000000) / 500000;
	390	break;
	391	default:
	392	dev_err(chg->dev, "Wrong value for OVP: %u\n",
	393	chg->pdata->ovp_uvolt);
	394	return -EINVAL;
	395	}
	396	reg_data <<= CHGCTRL7_OTPCGHCVS_SHIFT;
55e64701	397	max14577_write_reg(rmap, MAX14577_REG_CHGCTRL7, reg_data);
e30110e9 KK	398
e30110e9 KK	399	return 0;
55e64701 KK	400	}
	401
	402	/* Support property from charger */
	403	static enum power_supply_property max14577_charger_props[] = {
	404	POWER_SUPPLY_PROP_STATUS,
	405	POWER_SUPPLY_PROP_CHARGE_TYPE,
	406	POWER_SUPPLY_PROP_HEALTH,
	407	POWER_SUPPLY_PROP_PRESENT,
	408	POWER_SUPPLY_PROP_ONLINE,
	409	POWER_SUPPLY_PROP_MODEL_NAME,
	410	POWER_SUPPLY_PROP_MANUFACTURER,
	411	};
	412
3682a8ee KK	413	static const char * const model_names[] = {
	414	[MAXIM_DEVICE_TYPE_UNKNOWN] = "MAX14577-like",
	415	[MAXIM_DEVICE_TYPE_MAX14577] = "MAX14577",
	416	[MAXIM_DEVICE_TYPE_MAX77836] = "MAX77836",
	417	};
55e64701 KK	418	static const char *manufacturer = "Maxim Integrated";
	419
	420	static int max14577_charger_get_property(struct power_supply *psy,
	421	enum power_supply_property psp,
	422	union power_supply_propval *val)
	423	{
297d716f	424	struct max14577_charger *chg = power_supply_get_drvdata(psy);
55e64701 KK	425	int ret = 0;
	426
	427	switch (psp) {
	428	case POWER_SUPPLY_PROP_STATUS:
dd18a663	429	ret = max14577_get_charger_state(chg, &val->intval);
55e64701 KK	430	break;
55e64701 KK	431	case POWER_SUPPLY_PROP_CHARGE_TYPE:
dd18a663	432	ret = max14577_get_charge_type(chg, &val->intval);
55e64701 KK	433	break;
55e64701 KK	434	case POWER_SUPPLY_PROP_HEALTH:
dd18a663	435	ret = max14577_get_battery_health(chg, &val->intval);
55e64701 KK	436	break;
55e64701 KK	437	case POWER_SUPPLY_PROP_PRESENT:
dd18a663	438	ret = max14577_get_present(chg, &val->intval);
55e64701 KK	439	break;
55e64701 KK	440	case POWER_SUPPLY_PROP_ONLINE:
dd18a663	441	ret = max14577_get_online(chg, &val->intval);
55e64701 KK	442	break;
55e64701 KK	443	case POWER_SUPPLY_PROP_MODEL_NAME:
3682a8ee KK	444	BUILD_BUG_ON(ARRAY_SIZE(model_names) != MAXIM_DEVICE_TYPE_NUM);
3682a8ee KK	445	val->strval = model_names[chg->max14577->dev_type];
55e64701 KK	446	break;
	447	case POWER_SUPPLY_PROP_MANUFACTURER:
	448	val->strval = manufacturer;
	449	break;
	450	default:
	451	return -EINVAL;
	452	}
	453
	454	return ret;
	455	}
	456
297d716f KK	457	static const struct power_supply_desc max14577_charger_desc = {
	458	.name = "max14577-charger",
	459	.type = POWER_SUPPLY_TYPE_BATTERY,
	460	.properties = max14577_charger_props,
	461	.num_properties = ARRAY_SIZE(max14577_charger_props),
	462	.get_property = max14577_charger_get_property,
	463	};
	464
e30110e9 KK	465	#ifdef CONFIG_OF
	466	static struct max14577_charger_platform_data *max14577_charger_dt_init(
	467	struct platform_device *pdev)
	468	{
	469	struct max14577_charger_platform_data *pdata;
	470	struct device_node *np = pdev->dev.of_node;
	471	int ret;
	472
	473	if (!np) {
	474	dev_err(&pdev->dev, "No charger OF node\n");
	475	return ERR_PTR(-EINVAL);
	476	}
	477
	478	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	479	if (!pdata)
	480	return ERR_PTR(-ENOMEM);
	481
	482	ret = of_property_read_u32(np, "maxim,constant-uvolt",
	483	&pdata->constant_uvolt);
	484	if (ret) {
	485	dev_err(&pdev->dev, "Cannot parse maxim,constant-uvolt field from DT\n");
	486	return ERR_PTR(ret);
	487	}
	488
	489	ret = of_property_read_u32(np, "maxim,fast-charge-uamp",
	490	&pdata->fast_charge_uamp);
	491	if (ret) {
	492	dev_err(&pdev->dev, "Cannot parse maxim,fast-charge-uamp field from DT\n");
	493	return ERR_PTR(ret);
	494	}
	495
	496	ret = of_property_read_u32(np, "maxim,eoc-uamp", &pdata->eoc_uamp);
	497	if (ret) {
	498	dev_err(&pdev->dev, "Cannot parse maxim,eoc-uamp field from DT\n");
	499	return ERR_PTR(ret);
	500	}
	501
	502	ret = of_property_read_u32(np, "maxim,ovp-uvolt", &pdata->ovp_uvolt);
	503	if (ret) {
	504	dev_err(&pdev->dev, "Cannot parse maxim,ovp-uvolt field from DT\n");
	505	return ERR_PTR(ret);
	506	}
	507
	508	return pdata;
	509	}
	510	#else /* CONFIG_OF */
	511	static struct max14577_charger_platform_data *max14577_charger_dt_init(
	512	struct platform_device *pdev)
	513	{
	514	return NULL;
	515	}
	516	#endif /* CONFIG_OF */
	517
	518	static ssize_t show_fast_charge_timer(struct device *dev,
	519	struct device_attribute attr, char buf)
	520	{
	521	struct max14577_charger *chg = dev_get_drvdata(dev);
	522	u8 reg_data;
	523	int ret;
	524	unsigned int val;
	525
	526	ret = max14577_read_reg(chg->max14577->regmap, MAX14577_REG_CHGCTRL1,
	527	&reg_data);
	528	if (ret)
529	return ret;
530
531	reg_data &= CHGCTRL1_TCHW_MASK;
532	reg_data >>= CHGCTRL1_TCHW_SHIFT;
533	switch (reg_data) {
534	case 0x2 ... 0x4:
535	val = reg_data + 3;
536	break;
537	case 0x7:
538	val = 0;
539	break;
540	default:
541	val = 5;
542	break;
543	}
544
545	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
546	}
547
548	static ssize_t store_fast_charge_timer(struct device *dev,
549	struct device_attribute attr, const char buf, size_t count)
550	{
551	struct max14577_charger *chg = dev_get_drvdata(dev);
552	unsigned long val;
553	int ret;
554
555	ret = kstrtoul(buf, 10, &val);
556	if (ret)
557	return ret;
558
559	ret = max14577_set_fast_charge_timer(chg, val);
560	if (ret)
561	return ret;
562
563	return count;
564	}
565
566	static DEVICE_ATTR(fast_charge_timer, S_IRUGO \| S_IWUSR,
567	show_fast_charge_timer, store_fast_charge_timer);
568
55e64701 KK	569	static int max14577_charger_probe(struct platform_device *pdev)
	570	{
	571	struct max14577_charger *chg;
297d716f	572	struct power_supply_config psy_cfg = {};
55e64701 KK	573	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
	574	int ret;
	575
	576	chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
	577	if (!chg)
	578	return -ENOMEM;
	579
	580	platform_set_drvdata(pdev, chg);
	581	chg->dev = &pdev->dev;
	582	chg->max14577 = max14577;
	583
e30110e9 KK	584	chg->pdata = max14577_charger_dt_init(pdev);
	585	if (IS_ERR_OR_NULL(chg->pdata))
	586	return PTR_ERR(chg->pdata);
	587
	588	ret = max14577_charger_reg_init(chg);
	589	if (ret)
	590	return ret;
55e64701	591
e30110e9 KK	592	ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer);
	593	if (ret) {
	594	dev_err(&pdev->dev, "failed: create sysfs entry\n");
	595	return ret;
	596	}
	597
297d716f KK	598	psy_cfg.drv_data = chg;
	599	chg->charger = power_supply_register(&pdev->dev, &max14577_charger_desc,
	600	&psy_cfg);
	601	if (IS_ERR(chg->charger)) {
55e64701	602	dev_err(&pdev->dev, "failed: power supply register\n");
297d716f	603	ret = PTR_ERR(chg->charger);
e30110e9	604	goto err;
55e64701 KK	605	}
55e64701 KK	606
e30110e9 KK	607	/* Check for valid values for charger */
	608	BUILD_BUG_ON(MAX14577_CHARGER_EOC_CURRENT_LIMIT_MIN +
	609	MAX14577_CHARGER_EOC_CURRENT_LIMIT_STEP * 0xf !=
	610	MAX14577_CHARGER_EOC_CURRENT_LIMIT_MAX);
55e64701	611	return 0;
e30110e9 KK	612
	613	err:
	614	device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
	615
	616	return ret;
55e64701 KK	617	}
	618
	619	static int max14577_charger_remove(struct platform_device *pdev)
	620	{
	621	struct max14577_charger *chg = platform_get_drvdata(pdev);
	622
e30110e9	623	device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
297d716f	624	power_supply_unregister(chg->charger);
55e64701 KK	625
	626	return 0;
	627	}
	628
3682a8ee KK	629	static const struct platform_device_id max14577_charger_id[] = {
	630	{ "max14577-charger", MAXIM_DEVICE_TYPE_MAX14577, },
	631	{ "max77836-charger", MAXIM_DEVICE_TYPE_MAX77836, },
	632	{ }
	633	};
	634	MODULE_DEVICE_TABLE(platform, max14577_charger_id);
	635
55e64701 KK	636	static struct platform_driver max14577_charger_driver = {
55e64701 KK	637	.driver = {
55e64701 KK	638	.name = "max14577-charger",
	639	},
	640	.probe = max14577_charger_probe,
	641	.remove = max14577_charger_remove,
3682a8ee	642	.id_table = max14577_charger_id,
55e64701 KK	643	};
	644	module_platform_driver(max14577_charger_driver);
	645
	646	MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>");
3682a8ee	647	MODULE_DESCRIPTION("Maxim 14577/77836 charger driver");
55e64701	648	MODULE_LICENSE("GPL");