[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / power / max8903_charger.c

/*
 * max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver
 *
 * Copyright (C) 2011 Samsung Electronics
 * MyungJoo Ham <myungjoo.ham@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.
 *
 * 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/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;
	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 = container_of(psy,
			struct max8903_data, 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.type;

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

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

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

	if (old_type != data->psy.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 __devinit int max8903_probe(struct platform_device *pdev)
{
	struct max8903_data *data;
	struct device *dev = &pdev->dev;
	struct max8903_pdata *pdata = pdev->dev.platform_data;
	int ret = 0;
	int gpio;
	int ta_in = 0;
	int usb_in = 0;

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

	ret = power_supply_register(dev, &data->psy);
	if (ret) {
		dev_err(dev, "failed: power supply register.\n");
		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:
	kfree(data);
	return ret;
}

static __devexit 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);
		kfree(data);
	}

	return 0;
}

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

static int __init max8903_init(void)
{
	return platform_driver_register(&max8903_driver);
}
module_init(max8903_init);

static void __exit max8903_exit(void)
{
	platform_driver_unregister(&max8903_driver);
}
module_exit(max8903_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MAX8903 Charger Driver");
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
MODULE_ALIAS("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 <myungjoo.ham@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	* 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>
	25	#include <linux/slab.h>
	26	#include <linux/power_supply.h>
	27	#include <linux/platform_device.h>
	28	#include <linux/power/max8903_charger.h>
	29
	30	struct max8903_data {
464f29a2	31	struct max8903_pdata pdata;
b14a9ccc MH	32	struct device *dev;
	33	struct power_supply psy;
	34	bool fault;
	35	bool usb_in;
	36	bool ta_in;
	37	};
	38
	39	static enum power_supply_property max8903_charger_props[] = {
	40	POWER_SUPPLY_PROP_STATUS, /* Charger status output */
	41	POWER_SUPPLY_PROP_ONLINE, /* External power source */
	42	POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */
	43	};
	44
	45	static int max8903_get_property(struct power_supply *psy,
	46	enum power_supply_property psp,
	47	union power_supply_propval *val)
	48	{
	49	struct max8903_data *data = container_of(psy,
	50	struct max8903_data, psy);
	51
	52	switch (psp) {
	53	case POWER_SUPPLY_PROP_STATUS:
	54	val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
464f29a2 MH	55	if (data->pdata.chg) {
464f29a2 MH	56	if (gpio_get_value(data->pdata.chg) == 0)
b14a9ccc MH	57	val->intval = POWER_SUPPLY_STATUS_CHARGING;
	58	else if (data->usb_in \|\| data->ta_in)
	59	val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
	60	else
	61	val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
	62	}
	63	break;
	64	case POWER_SUPPLY_PROP_ONLINE:
	65	val->intval = 0;
	66	if (data->usb_in \|\| data->ta_in)
	67	val->intval = 1;
	68	break;
	69	case POWER_SUPPLY_PROP_HEALTH:
	70	val->intval = POWER_SUPPLY_HEALTH_GOOD;
	71	if (data->fault)
	72	val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
	73	break;
	74	default:
	75	return -EINVAL;
	76	}
	77	return 0;
	78	}
	79
	80	static irqreturn_t max8903_dcin(int irq, void *_data)
	81	{
	82	struct max8903_data *data = _data;
464f29a2	83	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	84	bool ta_in;
	85	enum power_supply_type old_type;
	86
	87	ta_in = gpio_get_value(pdata->dok) ? false : true;
	88
	89	if (ta_in == data->ta_in)
	90	return IRQ_HANDLED;
	91
	92	data->ta_in = ta_in;
	93
	94	/* Set Current-Limit-Mode 1:DC 0:USB */
	95	if (pdata->dcm)
	96	gpio_set_value(pdata->dcm, ta_in ? 1 : 0);
	97
	98	/* Charger Enable / Disable (cen is negated) */
	99	if (pdata->cen)
	100	gpio_set_value(pdata->cen, ta_in ? 0 :
	101	(data->usb_in ? 0 : 1));
	102
	103	dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ?
	104	"Connected" : "Disconnected");
	105
	106	old_type = data->psy.type;
	107
	108	if (data->ta_in)
	109	data->psy.type = POWER_SUPPLY_TYPE_MAINS;
	110	else if (data->usb_in)
	111	data->psy.type = POWER_SUPPLY_TYPE_USB;
	112	else
	113	data->psy.type = POWER_SUPPLY_TYPE_BATTERY;
	114
	115	if (old_type != data->psy.type)
	116	power_supply_changed(&data->psy);
	117
	118	return IRQ_HANDLED;
	119	}
	120
	121	static irqreturn_t max8903_usbin(int irq, void *_data)
	122	{
	123	struct max8903_data *data = _data;
464f29a2	124	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	125	bool usb_in;
	126	enum power_supply_type old_type;
	127
	128	usb_in = gpio_get_value(pdata->uok) ? false : true;
	129
	130	if (usb_in == data->usb_in)
	131	return IRQ_HANDLED;
	132
	133	data->usb_in = usb_in;
	134
	135	/* Do not touch Current-Limit-Mode */
	136
	137	/* Charger Enable / Disable (cen is negated) */
	138	if (pdata->cen)
	139	gpio_set_value(pdata->cen, usb_in ? 0 :
	140	(data->ta_in ? 0 : 1));
	141
	142	dev_dbg(data->dev, "USB Charger %s.\n", usb_in ?
	143	"Connected" : "Disconnected");
	144
	145	old_type = data->psy.type;
	146
	147	if (data->ta_in)
	148	data->psy.type = POWER_SUPPLY_TYPE_MAINS;
	149	else if (data->usb_in)
	150	data->psy.type = POWER_SUPPLY_TYPE_USB;
	151	else
	152	data->psy.type = POWER_SUPPLY_TYPE_BATTERY;
	153
	154	if (old_type != data->psy.type)
	155	power_supply_changed(&data->psy);
	156
	157	return IRQ_HANDLED;
	158	}
	159
	160	static irqreturn_t max8903_fault(int irq, void *_data)
	161	{
	162	struct max8903_data *data = _data;
464f29a2	163	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	164	bool fault;
	165
	166	fault = gpio_get_value(pdata->flt) ? false : true;
	167
	168	if (fault == data->fault)
	169	return IRQ_HANDLED;
	170
	171	data->fault = fault;
	172
	173	if (fault)
	174	dev_err(data->dev, "Charger suffers a fault and stops.\n");
	175	else
	176	dev_err(data->dev, "Charger recovered from a fault.\n");
	177
	178	return IRQ_HANDLED;
	179	}
	180
	181	static __devinit int max8903_probe(struct platform_device *pdev)
	182	{
	183	struct max8903_data *data;
	184	struct device *dev = &pdev->dev;
	185	struct max8903_pdata *pdata = pdev->dev.platform_data;
	186	int ret = 0;
	187	int gpio;
	188	int ta_in = 0;
	189	int usb_in = 0;
	190
	191	data = kzalloc(sizeof(struct max8903_data), GFP_KERNEL);
	192	if (data == NULL) {
	193	dev_err(dev, "Cannot allocate memory.\n");
	194	return -ENOMEM;
	195	}
464f29a2	196	memcpy(&data->pdata, pdata, sizeof(struct max8903_pdata));
b14a9ccc MH	197	data->dev = dev;
	198	platform_set_drvdata(pdev, data);
	199
	200	if (pdata->dc_valid == false && pdata->usb_valid == false) {
	201	dev_err(dev, "No valid power sources.\n");
	202	ret = -EINVAL;
	203	goto err;
	204	}
	205
	206	if (pdata->dc_valid) {
	207	if (pdata->dok && gpio_is_valid(pdata->dok) &&
	208	pdata->dcm && gpio_is_valid(pdata->dcm)) {
	209	gpio = pdata->dok; /* PULL_UPed Interrupt */
	210	ta_in = gpio_get_value(gpio) ? 0 : 1;
	211
	212	gpio = pdata->dcm; /* Output */
	213	gpio_set_value(gpio, ta_in);
	214	} else {
	215	dev_err(dev, "When DC is wired, DOK and DCM should"
	216	" be wired as well.\n");
	217	ret = -EINVAL;
	218	goto err;
	219	}
	220	} else {
	221	if (pdata->dcm) {
	222	if (gpio_is_valid(pdata->dcm))
	223	gpio_set_value(pdata->dcm, 0);
	224	else {
	225	dev_err(dev, "Invalid pin: dcm.\n");
	226	ret = -EINVAL;
	227	goto err;
	228	}
	229	}
	230	}
	231
	232	if (pdata->usb_valid) {
	233	if (pdata->uok && gpio_is_valid(pdata->uok)) {
	234	gpio = pdata->uok;
	235	usb_in = gpio_get_value(gpio) ? 0 : 1;
	236	} else {
	237	dev_err(dev, "When USB is wired, UOK should be wired."
	238	"as well.\n");
	239	ret = -EINVAL;
	240	goto err;
	241	}
	242	}
	243
	244	if (pdata->cen) {
	245	if (gpio_is_valid(pdata->cen)) {
	246	gpio_set_value(pdata->cen, (ta_in \|\| usb_in) ? 0 : 1);
	247	} else {
	248	dev_err(dev, "Invalid pin: cen.\n");
	249	ret = -EINVAL;
	250	goto err;
	251	}
	252	}
	253
	254	if (pdata->chg) {
	255	if (!gpio_is_valid(pdata->chg)) {
	256	dev_err(dev, "Invalid pin: chg.\n");
	257	ret = -EINVAL;
	258	goto err;
	259	}
	260	}
261
262	if (pdata->flt) {
263	if (!gpio_is_valid(pdata->flt)) {
264	dev_err(dev, "Invalid pin: flt.\n");
265	ret = -EINVAL;
266	goto err;
267	}
268	}
269
270	if (pdata->usus) {
271	if (!gpio_is_valid(pdata->usus)) {
272	dev_err(dev, "Invalid pin: usus.\n");
273	ret = -EINVAL;
274	goto err;
275	}
276	}
277
278	data->fault = false;
279	data->ta_in = ta_in;
280	data->usb_in = usb_in;
281
282	data->psy.name = "max8903_charger";
283	data->psy.type = (ta_in) ? POWER_SUPPLY_TYPE_MAINS :
284	((usb_in) ? POWER_SUPPLY_TYPE_USB :
285	POWER_SUPPLY_TYPE_BATTERY);
286	data->psy.get_property = max8903_get_property;
287	data->psy.properties = max8903_charger_props;
288	data->psy.num_properties = ARRAY_SIZE(max8903_charger_props);
289
290	ret = power_supply_register(dev, &data->psy);
291	if (ret) {
292	dev_err(dev, "failed: power supply register.\n");
293	goto err;
294	}
295
296	if (pdata->dc_valid) {
297	ret = request_threaded_irq(gpio_to_irq(pdata->dok),
298	NULL, max8903_dcin,
299	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
300	"MAX8903 DC IN", data);
301	if (ret) {
302	dev_err(dev, "Cannot request irq %d for DC (%d)\n",
303	gpio_to_irq(pdata->dok), ret);
304	goto err_psy;
305	}
306	}
307
308	if (pdata->usb_valid) {
309	ret = request_threaded_irq(gpio_to_irq(pdata->uok),
310	NULL, max8903_usbin,
311	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
312	"MAX8903 USB IN", data);
313	if (ret) {
314	dev_err(dev, "Cannot request irq %d for USB (%d)\n",
315	gpio_to_irq(pdata->uok), ret);
316	goto err_dc_irq;
317	}
318	}
319
320	if (pdata->flt) {
321	ret = request_threaded_irq(gpio_to_irq(pdata->flt),
322	NULL, max8903_fault,
323	IRQF_TRIGGER_FALLING \| IRQF_TRIGGER_RISING,
324	"MAX8903 Fault", data);
325	if (ret) {
326	dev_err(dev, "Cannot request irq %d for Fault (%d)\n",
327	gpio_to_irq(pdata->flt), ret);
328	goto err_usb_irq;
329	}
330	}
331
332	return 0;
333
334	err_usb_irq:
335	if (pdata->usb_valid)
336	free_irq(gpio_to_irq(pdata->uok), data);
337	err_dc_irq:
338	if (pdata->dc_valid)
339	free_irq(gpio_to_irq(pdata->dok), data);
340	err_psy:
341	power_supply_unregister(&data->psy);
342	err:
343	kfree(data);
344	return ret;
345	}
346
347	static __devexit int max8903_remove(struct platform_device *pdev)
348	{
349	struct max8903_data *data = platform_get_drvdata(pdev);
350
351	if (data) {
464f29a2	352	struct max8903_pdata *pdata = &data->pdata;
b14a9ccc MH	353
	354	if (pdata->flt)
	355	free_irq(gpio_to_irq(pdata->flt), data);
	356	if (pdata->usb_valid)
	357	free_irq(gpio_to_irq(pdata->uok), data);
	358	if (pdata->dc_valid)
	359	free_irq(gpio_to_irq(pdata->dok), data);
	360	power_supply_unregister(&data->psy);
	361	kfree(data);
	362	}
	363
	364	return 0;
	365	}
	366
	367	static struct platform_driver max8903_driver = {
	368	.probe = max8903_probe,
	369	.remove = __devexit_p(max8903_remove),
	370	.driver = {
	371	.name = "max8903-charger",
	372	.owner = THIS_MODULE,
	373	},
	374	};
	375
	376	static int __init max8903_init(void)
	377	{
	378	return platform_driver_register(&max8903_driver);
	379	}
	380	module_init(max8903_init);
	381
	382	static void __exit max8903_exit(void)
	383	{
	384	platform_driver_unregister(&max8903_driver);
	385	}
	386	module_exit(max8903_exit);
	387
	388	MODULE_LICENSE("GPL");
	389	MODULE_DESCRIPTION("MAX8903 Charger Driver");
	390	MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
	391	MODULE_ALIAS("max8903-charger");