[linux.git] / drivers / power / max8903_charger.c

/*
 * max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver
 *
 * Copyright (C) 2011 Samsung Electronics
 * MyungJoo Ham <[email protected]>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/power_supply.h>
#include <linux/platform_device.h>
#include <linux/power/max8903_charger.h>

struct max8903_data {
	struct max8903_pdata pdata;
	struct device *dev;
	struct power_supply *psy;
	struct power_supply_desc psy_desc;
	bool fault;
	bool usb_in;
	bool ta_in;
};

static enum power_supply_property max8903_charger_props[] = {
	POWER_SUPPLY_PROP_STATUS, /* Charger status output */
	POWER_SUPPLY_PROP_ONLINE, /* External power source */
	POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */
};

static int max8903_get_property(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct max8903_data *data = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
		if (data->pdata.chg) {
			if (gpio_get_value(data->pdata.chg) == 0)
				val->intval = POWER_SUPPLY_STATUS_CHARGING;
			else if (data->usb_in || data->ta_in)
				val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
			else
				val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		}
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = 0;
		if (data->usb_in || data->ta_in)
			val->intval = 1;
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		val->intval = POWER_SUPPLY_HEALTH_GOOD;
		if (data->fault)
			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static irqreturn_t max8903_dcin(int irq, void *_data)
{
	struct max8903_data *data = _data;
	struct max8903_pdata *pdata = &data->pdata;
	bool ta_in;
	enum power_supply_type old_type;

	ta_in = gpio_get_value(pdata->dok) ? false : true;

	if (ta_in == data->ta_in)
		return IRQ_HANDLED;

	data->ta_in = ta_in;

	/* Set Current-Limit-Mode 1:DC 0:USB */
	if (pdata->dcm)
		gpio_set_value(pdata->dcm, ta_in ? 1 : 0);

	/* Charger Enable / Disable (cen is negated) */
	if (pdata->cen)
		gpio_set_value(pdata->cen, ta_in ? 0 :
				(data->usb_in ? 0 : 1));

	dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ?
			"Connected" : "Disconnected");

	old_type = data->psy_desc.type;

	if (data->ta_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
	else if (data->usb_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
	else
		data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;

	if (old_type != data->psy_desc.type)
		power_supply_changed(data->psy);

	return IRQ_HANDLED;
}

static irqreturn_t max8903_usbin(int irq, void *_data)
{
	struct max8903_data *data = _data;
	struct max8903_pdata *pdata = &data->pdata;
	bool usb_in;
	enum power_supply_type old_type;

	usb_in = gpio_get_value(pdata->uok) ? false : true;

	if (usb_in == data->usb_in)
		return IRQ_HANDLED;

	data->usb_in = usb_in;

	/* Do not touch Current-Limit-Mode */

	/* Charger Enable / Disable (cen is negated) */
	if (pdata->cen)
		gpio_set_value(pdata->cen, usb_in ? 0 :
				(data->ta_in ? 0 : 1));

	dev_dbg(data->dev, "USB Charger %s.\n", usb_in ?
			"Connected" : "Disconnected");

	old_type = data->psy_desc.type;

	if (data->ta_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
	else if (data->usb_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
	else
		data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;

	if (old_type != data->psy_desc.type)
		power_supply_changed(data->psy);

	return IRQ_HANDLED;
}

static irqreturn_t max8903_fault(int irq, void *_data)
{
	struct max8903_data *data = _data;
	struct max8903_pdata *pdata = &data->pdata;
	bool fault;

	fault = gpio_get_value(pdata->flt) ? false : true;

	if (fault == data->fault)
		return IRQ_HANDLED;

	data->fault = fault;

	if (fault)
		dev_err(data->dev, "Charger suffers a fault and stops.\n");
	else
		dev_err(data->dev, "Charger recovered from a fault.\n");

	return IRQ_HANDLED;
}

static int max8903_probe(struct platform_device *pdev)
{
	struct max8903_data *data;
	struct device *dev = &pdev->dev;
	struct max8903_pdata *pdata = pdev->dev.platform_data;
	struct power_supply_config psy_cfg = {};
	int ret = 0;
	int gpio;
	int ta_in = 0;
	int usb_in = 0;

	data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL);
	if (data == NULL) {
		dev_err(dev, "Cannot allocate memory.\n");
		return -ENOMEM;
	}
	memcpy(&data->pdata, pdata, sizeof(struct max8903_pdata));
	data->dev = dev;
	platform_set_drvdata(pdev, data);

	if (pdata->dc_valid == false && pdata->usb_valid == false) {
		dev_err(dev, "No valid power sources.\n");
		ret = -EINVAL;
		goto err;
	}

	if (pdata->dc_valid) {
		if (pdata->dok && gpio_is_valid(pdata->dok) &&
				pdata->dcm && gpio_is_valid(pdata->dcm)) {
			gpio = pdata->dok; /* PULL_UPed Interrupt */
			ta_in = gpio_get_value(gpio) ? 0 : 1;

			gpio = pdata->dcm; /* Output */
			gpio_set_value(gpio, ta_in);
		} else {
			dev_err(dev, "When DC is wired, DOK and DCM should"
					" be wired as well.\n");
			ret = -EINVAL;
			goto err;
		}
	} else {
		if (pdata->dcm) {
			if (gpio_is_valid(pdata->dcm))
				gpio_set_value(pdata->dcm, 0);
			else {
				dev_err(dev, "Invalid pin: dcm.\n");
				ret = -EINVAL;
				goto err;
			}
		}
	}

	if (pdata->usb_valid) {
		if (pdata->uok && gpio_is_valid(pdata->uok)) {
			gpio = pdata->uok;
			usb_in = gpio_get_value(gpio) ? 0 : 1;
		} else {
			dev_err(dev, "When USB is wired, UOK should be wired."
					"as well.\n");
			ret = -EINVAL;
			goto err;
		}
	}

	if (pdata->cen) {
		if (gpio_is_valid(pdata->cen)) {
			gpio_set_value(pdata->cen, (ta_in || usb_in) ? 0 : 1);
		} else {
			dev_err(dev, "Invalid pin: cen.\n");
			ret = -EINVAL;
			goto err;
		}
	}

	if (pdata->chg) {
		if (!gpio_is_valid(pdata->chg)) {
			dev_err(dev, "Invalid pin: chg.\n");
			ret = -EINVAL;
			goto err;
		}
	}

	if (pdata->flt) {
		if (!gpio_is_valid(pdata->flt)) {
			dev_err(dev, "Invalid pin: flt.\n");
			ret = -EINVAL;
			goto err;
		}
	}

	if (pdata->usus) {
		if (!gpio_is_valid(pdata->usus)) {
			dev_err(dev, "Invalid pin: usus.\n");
			ret = -EINVAL;
			goto err;
		}
	}

	data->fault = false;
	data->ta_in = ta_in;
	data->usb_in = usb_in;

	data->psy_desc.name = "max8903_charger";
	data->psy_desc.type = (ta_in) ? POWER_SUPPLY_TYPE_MAINS :
			((usb_in) ? POWER_SUPPLY_TYPE_USB :
			 POWER_SUPPLY_TYPE_BATTERY);
	data->psy_desc.get_property = max8903_get_property;
	data->psy_desc.properties = max8903_charger_props;
	data->psy_desc.num_properties = ARRAY_SIZE(max8903_charger_props);

	psy_cfg.drv_data = data;

	data->psy = power_supply_register(dev, &data->psy_desc, &psy_cfg);
	if (IS_ERR(data->psy)) {
		dev_err(dev, "failed: power supply register.\n");
		ret = PTR_ERR(data->psy);
		goto err;
	}

	if (pdata->dc_valid) {
		ret = request_threaded_irq(gpio_to_irq(pdata->dok),
				NULL, max8903_dcin,
				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
				"MAX8903 DC IN", data);
		if (ret) {
			dev_err(dev, "Cannot request irq %d for DC (%d)\n",
					gpio_to_irq(pdata->dok), ret);
			goto err_psy;
		}
	}

	if (pdata->usb_valid) {
		ret = request_threaded_irq(gpio_to_irq(pdata->uok),
				NULL, max8903_usbin,
				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
				"MAX8903 USB IN", data);
		if (ret) {
			dev_err(dev, "Cannot request irq %d for USB (%d)\n",
					gpio_to_irq(pdata->uok), ret);
			goto err_dc_irq;
		}
	}

	if (pdata->flt) {
		ret = request_threaded_irq(gpio_to_irq(pdata->flt),
				NULL, max8903_fault,
				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
				"MAX8903 Fault", data);
		if (ret) {
			dev_err(dev, "Cannot request irq %d for Fault (%d)\n",
					gpio_to_irq(pdata->flt), ret);
			goto err_usb_irq;
		}
	}

	return 0;

err_usb_irq:
	if (pdata->usb_valid)
		free_irq(gpio_to_irq(pdata->uok), data);
err_dc_irq:
	if (pdata->dc_valid)
		free_irq(gpio_to_irq(pdata->dok), data);
err_psy:
	power_supply_unregister(data->psy);
err:
	return ret;
}

static int max8903_remove(struct platform_device *pdev)
{
	struct max8903_data *data = platform_get_drvdata(pdev);

	if (data) {
		struct max8903_pdata *pdata = &data->pdata;

		if (pdata->flt)
			free_irq(gpio_to_irq(pdata->flt), data);
		if (pdata->usb_valid)
			free_irq(gpio_to_irq(pdata->uok), data);
		if (pdata->dc_valid)
			free_irq(gpio_to_irq(pdata->dok), data);
		power_supply_unregister(data->psy);
	}

	return 0;
}

static struct platform_driver max8903_driver = {
	.probe	= max8903_probe,
	.remove	= max8903_remove,
	.driver = {
		.name	= "max8903-charger",
	},
};

module_platform_driver(max8903_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MAX8903 Charger Driver");
MODULE_AUTHOR("MyungJoo Ham <[email protected]>");
MODULE_ALIAS("platform:max8903-charger");
Commit	Line	Data
b14a9ccc MH	1	/*
	2	* max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver
	3	*
	4	* Copyright (C) 2011 Samsung Electronics
	5	* MyungJoo Ham <[email protected]>
	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	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	*/
	22
	23	#include <linux/gpio.h>
	24	#include <linux/interrupt.h>
7e6d62db	25	#include <linux/module.h>
b14a9ccc MH	26	#include <linux/slab.h>
	27	#include <linux/power_supply.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/power/max8903_charger.h>
	30
	31	struct max8903_data {
464f29a2	32	struct max8903_pdata pdata;
b14a9ccc	33	struct device *dev;
297d716f KK	34	struct power_supply *psy;
297d716f KK	35	struct power_supply_desc psy_desc;
b14a9ccc MH	36	bool fault;
	37	bool usb_in;
	38	bool ta_in;
	39	};
	40
	41	static enum power_supply_property max8903_charger_props[] = {
	42	POWER_SUPPLY_PROP_STATUS, /* Charger status output */
	43	POWER_SUPPLY_PROP_ONLINE, /* External power source */
	44	POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */
	45	};
	46
	47	static int max8903_get_property(struct power_supply *psy,
	48	enum power_supply_property psp,
	49	union power_supply_propval *val)
	50	{
297d716f	51	struct max8903_data *data = power_supply_get_drvdata(psy);
b14a9ccc MH	52
	53	switch (psp) {
	54	case POWER_SUPPLY_PROP_STATUS:
	55	val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
464f29a2 MH	56	if (data->pdata.chg) {
464f29a2 MH	57	if (gpio_get_value(data->pdata.chg) == 0)
b14a9ccc MH	58	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	59	else if (data->usb_in \|\| data->ta_in)
	60	val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
	61	else
	62	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	63	}
	64	break;
	65	case POWER_SUPPLY_PROP_ONLINE:
	66	val->intval = 0;
	67	if (data->usb_in \|\| data->ta_in)
	68	val->intval = 1;
	69	break;
	70	case POWER_SUPPLY_PROP_HEALTH:
	71	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	72	if (data->fault)
	73	val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
	74	break;
	75	default:
	76	return -EINVAL;
	77	}
	78	return 0;
	79	}
	80
	81	static irqreturn_t max8903_dcin(int irq, void *_data)
	82	{
	83	struct max8903_data *data = _data;
464f29a2	84	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	85	bool ta_in;
	86	enum power_supply_type old_type;
	87
	88	ta_in = gpio_get_value(pdata->dok) ? false : true;
	89
	90	if (ta_in == data->ta_in)
	91	return IRQ_HANDLED;
	92
	93	data->ta_in = ta_in;
	94
	95	/* Set Current-Limit-Mode 1:DC 0:USB */
	96	if (pdata->dcm)
	97	gpio_set_value(pdata->dcm, ta_in ? 1 : 0);
	98
	99	/* Charger Enable / Disable (cen is negated) */
	100	if (pdata->cen)
	101	gpio_set_value(pdata->cen, ta_in ? 0 :
	102	(data->usb_in ? 0 : 1));
	103
	104	dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ?
	105	"Connected" : "Disconnected");
	106
297d716f	107	old_type = data->psy_desc.type;
b14a9ccc MH	108
b14a9ccc MH	109	if (data->ta_in)
297d716f	110	data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
b14a9ccc	111	else if (data->usb_in)
297d716f	112	data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
b14a9ccc	113	else
297d716f	114	data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
b14a9ccc	115
297d716f KK	116	if (old_type != data->psy_desc.type)
297d716f KK	117	power_supply_changed(data->psy);
b14a9ccc MH	118
	119	return IRQ_HANDLED;
	120	}
	121
	122	static irqreturn_t max8903_usbin(int irq, void *_data)
	123	{
	124	struct max8903_data *data = _data;
464f29a2	125	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	126	bool usb_in;
	127	enum power_supply_type old_type;
	128
	129	usb_in = gpio_get_value(pdata->uok) ? false : true;
	130
	131	if (usb_in == data->usb_in)
	132	return IRQ_HANDLED;
	133
	134	data->usb_in = usb_in;
	135
	136	/* Do not touch Current-Limit-Mode */
	137
	138	/* Charger Enable / Disable (cen is negated) */
	139	if (pdata->cen)
	140	gpio_set_value(pdata->cen, usb_in ? 0 :
	141	(data->ta_in ? 0 : 1));
	142
	143	dev_dbg(data->dev, "USB Charger %s.\n", usb_in ?
	144	"Connected" : "Disconnected");
	145
297d716f	146	old_type = data->psy_desc.type;
b14a9ccc MH	147
b14a9ccc MH	148	if (data->ta_in)
297d716f	149	data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
b14a9ccc	150	else if (data->usb_in)
297d716f	151	data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
b14a9ccc	152	else
297d716f	153	data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;
b14a9ccc	154
297d716f KK	155	if (old_type != data->psy_desc.type)
297d716f KK	156	power_supply_changed(data->psy);
b14a9ccc MH	157
	158	return IRQ_HANDLED;
	159	}
	160
	161	static irqreturn_t max8903_fault(int irq, void *_data)
	162	{
	163	struct max8903_data *data = _data;
464f29a2	164	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	165	bool fault;
	166
	167	fault = gpio_get_value(pdata->flt) ? false : true;
	168
	169	if (fault == data->fault)
	170	return IRQ_HANDLED;
	171
	172	data->fault = fault;
	173
	174	if (fault)
	175	dev_err(data->dev, "Charger suffers a fault and stops.\n");
	176	else
	177	dev_err(data->dev, "Charger recovered from a fault.\n");
	178
	179	return IRQ_HANDLED;
	180	}
	181
c8afa640	182	static int max8903_probe(struct platform_device *pdev)
b14a9ccc MH	183	{
	184	struct max8903_data *data;
	185	struct device *dev = &pdev->dev;
	186	struct max8903_pdata *pdata = pdev->dev.platform_data;
297d716f	187	struct power_supply_config psy_cfg = {};
b14a9ccc MH	188	int ret = 0;
	189	int gpio;
	190	int ta_in = 0;
	191	int usb_in = 0;
	192
f3f66b3e	193	data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL);
b14a9ccc MH	194	if (data == NULL) {
	195	dev_err(dev, "Cannot allocate memory.\n");
	196	return -ENOMEM;
	197	}
464f29a2	198	memcpy(&data->pdata, pdata, sizeof(struct max8903_pdata));
b14a9ccc MH	199	data->dev = dev;
	200	platform_set_drvdata(pdev, data);
	201
	202	if (pdata->dc_valid == false && pdata->usb_valid == false) {
	203	dev_err(dev, "No valid power sources.\n");
	204	ret = -EINVAL;
	205	goto err;
	206	}
	207
	208	if (pdata->dc_valid) {
	209	if (pdata->dok && gpio_is_valid(pdata->dok) &&
	210	pdata->dcm && gpio_is_valid(pdata->dcm)) {
	211	gpio = pdata->dok; /* PULL_UPed Interrupt */
	212	ta_in = gpio_get_value(gpio) ? 0 : 1;
	213
	214	gpio = pdata->dcm; /* Output */
	215	gpio_set_value(gpio, ta_in);
	216	} else {
	217	dev_err(dev, "When DC is wired, DOK and DCM should"
	218	" be wired as well.\n");
	219	ret = -EINVAL;
	220	goto err;
	221	}
	222	} else {
	223	if (pdata->dcm) {
	224	if (gpio_is_valid(pdata->dcm))
	225	gpio_set_value(pdata->dcm, 0);
	226	else {
	227	dev_err(dev, "Invalid pin: dcm.\n");
	228	ret = -EINVAL;
	229	goto err;
	230	}
	231	}
	232	}
	233
	234	if (pdata->usb_valid) {
	235	if (pdata->uok && gpio_is_valid(pdata->uok)) {
	236	gpio = pdata->uok;
	237	usb_in = gpio_get_value(gpio) ? 0 : 1;
	238	} else {
	239	dev_err(dev, "When USB is wired, UOK should be wired."
	240	"as well.\n");
	241	ret = -EINVAL;
	242	goto err;
	243	}
	244	}
	245
	246	if (pdata->cen) {
	247	if (gpio_is_valid(pdata->cen)) {
	248	gpio_set_value(pdata->cen, (ta_in \|\| usb_in) ? 0 : 1);
	249	} else {
	250	dev_err(dev, "Invalid pin: cen.\n");
	251	ret = -EINVAL;
	252	goto err;
	253	}
	254	}
	255
	256	if (pdata->chg) {
	257	if (!gpio_is_valid(pdata->chg)) {
	258	dev_err(dev, "Invalid pin: chg.\n");
	259	ret = -EINVAL;
	260	goto err;
	261	}
	262	}
263
264	if (pdata->flt) {
265	if (!gpio_is_valid(pdata->flt)) {
266	dev_err(dev, "Invalid pin: flt.\n");
267	ret = -EINVAL;
268	goto err;
269	}
270	}
271
272	if (pdata->usus) {
273	if (!gpio_is_valid(pdata->usus)) {
274	dev_err(dev, "Invalid pin: usus.\n");
275	ret = -EINVAL;
276	goto err;
277	}
278	}
279
280	data->fault = false;
281	data->ta_in = ta_in;
282	data->usb_in = usb_in;
283
297d716f KK	284	data->psy_desc.name = "max8903_charger";
297d716f KK	285	data->psy_desc.type = (ta_in) ? POWER_SUPPLY_TYPE_MAINS :
b14a9ccc MH	286	((usb_in) ? POWER_SUPPLY_TYPE_USB :
b14a9ccc MH	287	POWER_SUPPLY_TYPE_BATTERY);
297d716f KK	288	data->psy_desc.get_property = max8903_get_property;
	289	data->psy_desc.properties = max8903_charger_props;
	290	data->psy_desc.num_properties = ARRAY_SIZE(max8903_charger_props);
b14a9ccc	291
297d716f KK	292	psy_cfg.drv_data = data;
	293
	294	data->psy = power_supply_register(dev, &data->psy_desc, &psy_cfg);
	295	if (IS_ERR(data->psy)) {
b14a9ccc	296	dev_err(dev, "failed: power supply register.\n");
297d716f	297	ret = PTR_ERR(data->psy);
b14a9ccc MH	298	goto err;
	299	}
	300
	301	if (pdata->dc_valid) {
	302	ret = request_threaded_irq(gpio_to_irq(pdata->dok),
	303	NULL, max8903_dcin,
	304	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
	305	"MAX8903 DC IN", data);
	306	if (ret) {
	307	dev_err(dev, "Cannot request irq %d for DC (%d)\n",
	308	gpio_to_irq(pdata->dok), ret);
	309	goto err_psy;
	310	}
	311	}
	312
	313	if (pdata->usb_valid) {
	314	ret = request_threaded_irq(gpio_to_irq(pdata->uok),
	315	NULL, max8903_usbin,
	316	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
	317	"MAX8903 USB IN", data);
	318	if (ret) {
	319	dev_err(dev, "Cannot request irq %d for USB (%d)\n",
	320	gpio_to_irq(pdata->uok), ret);
	321	goto err_dc_irq;
	322	}
	323	}
	324
	325	if (pdata->flt) {
	326	ret = request_threaded_irq(gpio_to_irq(pdata->flt),
	327	NULL, max8903_fault,
	328	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
	329	"MAX8903 Fault", data);
	330	if (ret) {
	331	dev_err(dev, "Cannot request irq %d for Fault (%d)\n",
	332	gpio_to_irq(pdata->flt), ret);
	333	goto err_usb_irq;
	334	}
	335	}
	336
	337	return 0;
	338
	339	err_usb_irq:
	340	if (pdata->usb_valid)
	341	free_irq(gpio_to_irq(pdata->uok), data);
	342	err_dc_irq:
	343	if (pdata->dc_valid)
	344	free_irq(gpio_to_irq(pdata->dok), data);
	345	err_psy:
297d716f	346	power_supply_unregister(data->psy);
b14a9ccc	347	err:
b14a9ccc MH	348	return ret;
	349	}
	350
415ec69f	351	static int max8903_remove(struct platform_device *pdev)
b14a9ccc MH	352	{
	353	struct max8903_data *data = platform_get_drvdata(pdev);
	354
	355	if (data) {
464f29a2	356	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	357
	358	if (pdata->flt)
	359	free_irq(gpio_to_irq(pdata->flt), data);
	360	if (pdata->usb_valid)
	361	free_irq(gpio_to_irq(pdata->uok), data);
	362	if (pdata->dc_valid)
	363	free_irq(gpio_to_irq(pdata->dok), data);
297d716f	364	power_supply_unregister(data->psy);
b14a9ccc MH	365	}
	366
	367	return 0;
	368	}
	369
	370	static struct platform_driver max8903_driver = {
	371	.probe = max8903_probe,
28ea73f4	372	.remove = max8903_remove,
b14a9ccc MH	373	.driver = {
b14a9ccc MH	374	.name = "max8903-charger",
b14a9ccc MH	375	},
	376	};
	377
300bac7f	378	module_platform_driver(max8903_driver);
b14a9ccc MH	379
	380	MODULE_LICENSE("GPL");
	381	MODULE_DESCRIPTION("MAX8903 Charger Driver");
	382	MODULE_AUTHOR("MyungJoo Ham <[email protected]>");
bd19c756	383	MODULE_ALIAS("platform:max8903-charger");