[deliverable/linux.git] / drivers / regulator / max8952.c

/*
 * max8952.c - Voltage and current regulation for the Maxim 8952
 *
 * Copyright (C) 2010 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/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/max8952.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/slab.h>

/* Registers */
enum {
	MAX8952_REG_MODE0,
	MAX8952_REG_MODE1,
	MAX8952_REG_MODE2,
	MAX8952_REG_MODE3,
	MAX8952_REG_CONTROL,
	MAX8952_REG_SYNC,
	MAX8952_REG_RAMP,
	MAX8952_REG_CHIP_ID1,
	MAX8952_REG_CHIP_ID2,
};

struct max8952_data {
	struct i2c_client	*client;
	struct device		*dev;
	struct max8952_platform_data *pdata;
	struct regulator_dev	*rdev;

	bool vid0;
	bool vid1;
	bool en;
};

static int max8952_read_reg(struct max8952_data *max8952, u8 reg)
{
	int ret = i2c_smbus_read_byte_data(max8952->client, reg);
	if (ret > 0)
		ret &= 0xff;

	return ret;
}

static int max8952_write_reg(struct max8952_data *max8952,
		u8 reg, u8 value)
{
	return i2c_smbus_write_byte_data(max8952->client, reg, value);
}

static int max8952_list_voltage(struct regulator_dev *rdev,
		unsigned int selector)
{
	struct max8952_data *max8952 = rdev_get_drvdata(rdev);

	if (rdev_get_id(rdev) != 0)
		return -EINVAL;

	return (max8952->pdata->dvs_mode[selector] * 10 + 770) * 1000;
}

static int max8952_is_enabled(struct regulator_dev *rdev)
{
	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	return max8952->en;
}

static int max8952_enable(struct regulator_dev *rdev)
{
	struct max8952_data *max8952 = rdev_get_drvdata(rdev);

	/* If not valid, assume "ALWAYS_HIGH" */
	if (gpio_is_valid(max8952->pdata->gpio_en))
		gpio_set_value(max8952->pdata->gpio_en, 1);

	max8952->en = true;
	return 0;
}

static int max8952_disable(struct regulator_dev *rdev)
{
	struct max8952_data *max8952 = rdev_get_drvdata(rdev);

	/* If not valid, assume "ALWAYS_HIGH" -> not permitted */
	if (gpio_is_valid(max8952->pdata->gpio_en))
		gpio_set_value(max8952->pdata->gpio_en, 0);
	else
		return -EPERM;

	max8952->en = false;
	return 0;
}

static int max8952_get_voltage_sel(struct regulator_dev *rdev)
{
	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	u8 vid = 0;

	if (max8952->vid0)
		vid += 1;
	if (max8952->vid1)
		vid += 2;

	return vid;
}

static int max8952_set_voltage_sel(struct regulator_dev *rdev,
				   unsigned selector)
{
	struct max8952_data *max8952 = rdev_get_drvdata(rdev);

	if (!gpio_is_valid(max8952->pdata->gpio_vid0) ||
			!gpio_is_valid(max8952->pdata->gpio_vid1)) {
		/* DVS not supported */
		return -EPERM;
	}

	max8952->vid0 = selector & 0x1;
	max8952->vid1 = (selector >> 1) & 0x1;
	gpio_set_value(max8952->pdata->gpio_vid0, max8952->vid0);
	gpio_set_value(max8952->pdata->gpio_vid1, max8952->vid1);

	return 0;
}

static struct regulator_ops max8952_ops = {
	.list_voltage		= max8952_list_voltage,
	.is_enabled		= max8952_is_enabled,
	.enable			= max8952_enable,
	.disable		= max8952_disable,
	.get_voltage_sel	= max8952_get_voltage_sel,
	.set_voltage_sel	= max8952_set_voltage_sel,
};

static const struct regulator_desc regulator = {
	.name		= "MAX8952_VOUT",
	.id		= 0,
	.n_voltages	= MAX8952_NUM_DVS_MODE,
	.ops		= &max8952_ops,
	.type		= REGULATOR_VOLTAGE,
	.owner		= THIS_MODULE,
};

static int __devinit max8952_pmic_probe(struct i2c_client *client,
		const struct i2c_device_id *i2c_id)
{
	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
	struct max8952_platform_data *pdata = client->dev.platform_data;
	struct regulator_config config = { };
	struct max8952_data *max8952;

	int ret = 0, err = 0;

	if (!pdata) {
		dev_err(&client->dev, "Require the platform data\n");
		return -EINVAL;
	}

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

	max8952 = devm_kzalloc(&client->dev, sizeof(struct max8952_data),
			       GFP_KERNEL);
	if (!max8952)
		return -ENOMEM;

	max8952->client = client;
	max8952->dev = &client->dev;
	max8952->pdata = pdata;

	config.dev = max8952->dev;
	config.init_data = &pdata->reg_data;
	config.driver_data = max8952;

	max8952->rdev = regulator_register(&regulator, &config);

	if (IS_ERR(max8952->rdev)) {
		ret = PTR_ERR(max8952->rdev);
		dev_err(max8952->dev, "regulator init failed (%d)\n", ret);
		return ret;
	}

	max8952->en = !!(pdata->reg_data.constraints.boot_on);
	max8952->vid0 = pdata->default_mode & 0x1;
	max8952->vid1 = (pdata->default_mode >> 1) & 0x1;

	if (gpio_is_valid(pdata->gpio_en)) {
		if (!gpio_request(pdata->gpio_en, "MAX8952 EN"))
			gpio_direction_output(pdata->gpio_en, max8952->en);
		else
			err = 1;
	} else
		err = 2;

	if (err) {
		dev_info(max8952->dev, "EN gpio invalid: assume that EN"
				"is always High\n");
		max8952->en = 1;
		pdata->gpio_en = -1; /* Mark invalid */
	}

	err = 0;

	if (gpio_is_valid(pdata->gpio_vid0) &&
			gpio_is_valid(pdata->gpio_vid1)) {
		if (!gpio_request(pdata->gpio_vid0, "MAX8952 VID0"))
			gpio_direction_output(pdata->gpio_vid0,
					(pdata->default_mode) & 0x1);
		else
			err = 1;

		if (!gpio_request(pdata->gpio_vid1, "MAX8952 VID1"))
			gpio_direction_output(pdata->gpio_vid1,
				(pdata->default_mode >> 1) & 0x1);
		else {
			if (!err)
				gpio_free(pdata->gpio_vid0);
			err = 2;
		}

	} else
		err = 3;

	if (err) {
		dev_warn(max8952->dev, "VID0/1 gpio invalid: "
				"DVS not available.\n");
		max8952->vid0 = 0;
		max8952->vid1 = 0;
		/* Mark invalid */
		pdata->gpio_vid0 = -1;
		pdata->gpio_vid1 = -1;

		/* Disable Pulldown of EN only */
		max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x60);

		dev_err(max8952->dev, "DVS modes disabled because VID0 and VID1"
				" do not have proper controls.\n");
	} else {
		/*
		 * Disable Pulldown on EN, VID0, VID1 to reduce
		 * leakage current of MAX8952 assuming that MAX8952
		 * is turned on (EN==1). Note that without having VID0/1
		 * properly connected, turning pulldown off can be
		 * problematic. Thus, turn this off only when they are
		 * controllable by GPIO.
		 */
		max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x0);
	}

	max8952_write_reg(max8952, MAX8952_REG_MODE0,
			(max8952_read_reg(max8952,
					  MAX8952_REG_MODE0) & 0xC0) |
			(pdata->dvs_mode[0] & 0x3F));
	max8952_write_reg(max8952, MAX8952_REG_MODE1,
			(max8952_read_reg(max8952,
					  MAX8952_REG_MODE1) & 0xC0) |
			(pdata->dvs_mode[1] & 0x3F));
	max8952_write_reg(max8952, MAX8952_REG_MODE2,
			(max8952_read_reg(max8952,
					  MAX8952_REG_MODE2) & 0xC0) |
			(pdata->dvs_mode[2] & 0x3F));
	max8952_write_reg(max8952, MAX8952_REG_MODE3,
			(max8952_read_reg(max8952,
					  MAX8952_REG_MODE3) & 0xC0) |
			(pdata->dvs_mode[3] & 0x3F));

	max8952_write_reg(max8952, MAX8952_REG_SYNC,
			(max8952_read_reg(max8952, MAX8952_REG_SYNC) & 0x3F) |
			((pdata->sync_freq & 0x3) << 6));
	max8952_write_reg(max8952, MAX8952_REG_RAMP,
			(max8952_read_reg(max8952, MAX8952_REG_RAMP) & 0x1F) |
			((pdata->ramp_speed & 0x7) << 5));

	i2c_set_clientdata(client, max8952);

	return 0;
}

static int __devexit max8952_pmic_remove(struct i2c_client *client)
{
	struct max8952_data *max8952 = i2c_get_clientdata(client);
	struct max8952_platform_data *pdata = max8952->pdata;
	struct regulator_dev *rdev = max8952->rdev;

	regulator_unregister(rdev);

	gpio_free(pdata->gpio_vid0);
	gpio_free(pdata->gpio_vid1);
	gpio_free(pdata->gpio_en);
	return 0;
}

static const struct i2c_device_id max8952_ids[] = {
	{ "max8952", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, max8952_ids);

static struct i2c_driver max8952_pmic_driver = {
	.probe		= max8952_pmic_probe,
	.remove		= __devexit_p(max8952_pmic_remove),
	.driver		= {
		.name	= "max8952",
	},
	.id_table	= max8952_ids,
};

static int __init max8952_pmic_init(void)
{
	return i2c_add_driver(&max8952_pmic_driver);
}
subsys_initcall(max8952_pmic_init);

static void __exit max8952_pmic_exit(void)
{
	i2c_del_driver(&max8952_pmic_driver);
}
module_exit(max8952_pmic_exit);

MODULE_DESCRIPTION("MAXIM 8952 voltage regulator driver");
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
202f4f53 MH	1	/*
	2	* max8952.c - Voltage and current regulation for the Maxim 8952
	3	*
	4	* Copyright (C) 2010 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	#include <linux/module.h>
	23	#include <linux/init.h>
	24	#include <linux/i2c.h>
	25	#include <linux/err.h>
	26	#include <linux/platform_device.h>
	27	#include <linux/regulator/driver.h>
	28	#include <linux/regulator/max8952.h>
202f4f53 MH	29	#include <linux/gpio.h>
	30	#include <linux/io.h>
	31	#include <linux/slab.h>
	32
	33	/* Registers */
	34	enum {
	35	MAX8952_REG_MODE0,
	36	MAX8952_REG_MODE1,
	37	MAX8952_REG_MODE2,
	38	MAX8952_REG_MODE3,
	39	MAX8952_REG_CONTROL,
	40	MAX8952_REG_SYNC,
	41	MAX8952_REG_RAMP,
	42	MAX8952_REG_CHIP_ID1,
	43	MAX8952_REG_CHIP_ID2,
	44	};
	45
	46	struct max8952_data {
	47	struct i2c_client *client;
	48	struct device *dev;
202f4f53 MH	49	struct max8952_platform_data *pdata;
	50	struct regulator_dev *rdev;
	51
	52	bool vid0;
	53	bool vid1;
	54	bool en;
	55	};
	56
	57	static int max8952_read_reg(struct max8952_data *max8952, u8 reg)
	58	{
	59	int ret = i2c_smbus_read_byte_data(max8952->client, reg);
	60	if (ret > 0)
	61	ret &= 0xff;
	62
	63	return ret;
	64	}
	65
	66	static int max8952_write_reg(struct max8952_data *max8952,
	67	u8 reg, u8 value)
	68	{
	69	return i2c_smbus_write_byte_data(max8952->client, reg, value);
	70	}
	71
202f4f53 MH	72	static int max8952_list_voltage(struct regulator_dev *rdev,
	73	unsigned int selector)
	74	{
	75	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	76
	77	if (rdev_get_id(rdev) != 0)
	78	return -EINVAL;
	79
b9b49af5	80	return (max8952->pdata->dvs_mode[selector] * 10 + 770) * 1000;
202f4f53 MH	81	}
	82
	83	static int max8952_is_enabled(struct regulator_dev *rdev)
	84	{
	85	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	86	return max8952->en;
	87	}
	88
	89	static int max8952_enable(struct regulator_dev *rdev)
	90	{
	91	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	92
	93	/* If not valid, assume "ALWAYS_HIGH" */
	94	if (gpio_is_valid(max8952->pdata->gpio_en))
	95	gpio_set_value(max8952->pdata->gpio_en, 1);
	96
	97	max8952->en = true;
	98	return 0;
	99	}
	100
	101	static int max8952_disable(struct regulator_dev *rdev)
	102	{
	103	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	104
	105	/* If not valid, assume "ALWAYS_HIGH" -> not permitted */
	106	if (gpio_is_valid(max8952->pdata->gpio_en))
	107	gpio_set_value(max8952->pdata->gpio_en, 0);
	108	else
	109	return -EPERM;
	110
	111	max8952->en = false;
	112	return 0;
	113	}
	114
b9b49af5	115	static int max8952_get_voltage_sel(struct regulator_dev *rdev)
202f4f53 MH	116	{
	117	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
	118	u8 vid = 0;
	119
	120	if (max8952->vid0)
	121	vid += 1;
	122	if (max8952->vid1)
	123	vid += 2;
	124
b9b49af5	125	return vid;
202f4f53 MH	126	}
202f4f53 MH	127
6ea67d04 AL	128	static int max8952_set_voltage_sel(struct regulator_dev *rdev,
6ea67d04 AL	129	unsigned selector)
202f4f53 MH	130	{
202f4f53 MH	131	struct max8952_data *max8952 = rdev_get_drvdata(rdev);
202f4f53 MH	132
202f4f53 MH	133	if (!gpio_is_valid(max8952->pdata->gpio_vid0) \|\|
e2cf3137	134	!gpio_is_valid(max8952->pdata->gpio_vid1)) {
202f4f53 MH	135	/* DVS not supported */
	136	return -EPERM;
	137	}
	138
6ea67d04 AL	139	max8952->vid0 = selector & 0x1;
	140	max8952->vid1 = (selector >> 1) & 0x1;
	141	gpio_set_value(max8952->pdata->gpio_vid0, max8952->vid0);
	142	gpio_set_value(max8952->pdata->gpio_vid1, max8952->vid1);
202f4f53 MH	143
	144	return 0;
	145	}
	146
	147	static struct regulator_ops max8952_ops = {
	148	.list_voltage = max8952_list_voltage,
	149	.is_enabled = max8952_is_enabled,
	150	.enable = max8952_enable,
	151	.disable = max8952_disable,
b9b49af5	152	.get_voltage_sel = max8952_get_voltage_sel,
6ea67d04	153	.set_voltage_sel = max8952_set_voltage_sel,
202f4f53 MH	154	};
202f4f53 MH	155
bd6ff0d6	156	static const struct regulator_desc regulator = {
202f4f53 MH	157	.name = "MAX8952_VOUT",
	158	.id = 0,
	159	.n_voltages = MAX8952_NUM_DVS_MODE,
	160	.ops = &max8952_ops,
	161	.type = REGULATOR_VOLTAGE,
	162	.owner = THIS_MODULE,
	163	};
	164
	165	static int __devinit max8952_pmic_probe(struct i2c_client *client,
	166	const struct i2c_device_id *i2c_id)
	167	{
	168	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
	169	struct max8952_platform_data *pdata = client->dev.platform_data;
c172708d	170	struct regulator_config config = { };
202f4f53 MH	171	struct max8952_data *max8952;
	172
	173	int ret = 0, err = 0;
	174
	175	if (!pdata) {
	176	dev_err(&client->dev, "Require the platform data\n");
	177	return -EINVAL;
	178	}
	179
	180	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
	181	return -EIO;
	182
372de4aa AL	183	max8952 = devm_kzalloc(&client->dev, sizeof(struct max8952_data),
372de4aa AL	184	GFP_KERNEL);
202f4f53 MH	185	if (!max8952)
	186	return -ENOMEM;
	187
	188	max8952->client = client;
	189	max8952->dev = &client->dev;
	190	max8952->pdata = pdata;
202f4f53	191
c172708d MB	192	config.dev = max8952->dev;
	193	config.init_data = &pdata->reg_data;
	194	config.driver_data = max8952;
	195
	196	max8952->rdev = regulator_register(&regulator, &config);
202f4f53	197
da05738e AL	198	if (IS_ERR(max8952->rdev)) {
da05738e AL	199	ret = PTR_ERR(max8952->rdev);
202f4f53	200	dev_err(max8952->dev, "regulator init failed (%d)\n", ret);
372de4aa	201	return ret;
da05738e	202	}
202f4f53 MH	203
202f4f53 MH	204	max8952->en = !!(pdata->reg_data.constraints.boot_on);
c8237f01 AL	205	max8952->vid0 = pdata->default_mode & 0x1;
c8237f01 AL	206	max8952->vid1 = (pdata->default_mode >> 1) & 0x1;
202f4f53 MH	207
	208	if (gpio_is_valid(pdata->gpio_en)) {
	209	if (!gpio_request(pdata->gpio_en, "MAX8952 EN"))
	210	gpio_direction_output(pdata->gpio_en, max8952->en);
	211	else
	212	err = 1;
	213	} else
	214	err = 2;
	215
	216	if (err) {
	217	dev_info(max8952->dev, "EN gpio invalid: assume that EN"
	218	"is always High\n");
	219	max8952->en = 1;
	220	pdata->gpio_en = -1; /* Mark invalid */
	221	}
	222
	223	err = 0;
	224
	225	if (gpio_is_valid(pdata->gpio_vid0) &&
	226	gpio_is_valid(pdata->gpio_vid1)) {
	227	if (!gpio_request(pdata->gpio_vid0, "MAX8952 VID0"))
	228	gpio_direction_output(pdata->gpio_vid0,
c8237f01	229	(pdata->default_mode) & 0x1);
202f4f53 MH	230	else
	231	err = 1;
	232
	233	if (!gpio_request(pdata->gpio_vid1, "MAX8952 VID1"))
	234	gpio_direction_output(pdata->gpio_vid1,
c8237f01	235	(pdata->default_mode >> 1) & 0x1);
202f4f53 MH	236	else {
	237	if (!err)
	238	gpio_free(pdata->gpio_vid0);
	239	err = 2;
	240	}
	241
	242	} else
	243	err = 3;
	244
	245	if (err) {
	246	dev_warn(max8952->dev, "VID0/1 gpio invalid: "
25985edc	247	"DVS not available.\n");
202f4f53 MH	248	max8952->vid0 = 0;
	249	max8952->vid1 = 0;
	250	/* Mark invalid */
	251	pdata->gpio_vid0 = -1;
	252	pdata->gpio_vid1 = -1;
	253
	254	/* Disable Pulldown of EN only */
	255	max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x60);
	256
	257	dev_err(max8952->dev, "DVS modes disabled because VID0 and VID1"
	258	" do not have proper controls.\n");
	259	} else {
	260	/*
	261	* Disable Pulldown on EN, VID0, VID1 to reduce
	262	* leakage current of MAX8952 assuming that MAX8952
	263	* is turned on (EN==1). Note that without having VID0/1
	264	* properly connected, turning pulldown off can be
	265	* problematic. Thus, turn this off only when they are
	266	* controllable by GPIO.
	267	*/
	268	max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x0);
	269	}
	270
	271	max8952_write_reg(max8952, MAX8952_REG_MODE0,
	272	(max8952_read_reg(max8952,
	273	MAX8952_REG_MODE0) & 0xC0) \|
	274	(pdata->dvs_mode[0] & 0x3F));
	275	max8952_write_reg(max8952, MAX8952_REG_MODE1,
	276	(max8952_read_reg(max8952,
	277	MAX8952_REG_MODE1) & 0xC0) \|
	278	(pdata->dvs_mode[1] & 0x3F));
	279	max8952_write_reg(max8952, MAX8952_REG_MODE2,
	280	(max8952_read_reg(max8952,
	281	MAX8952_REG_MODE2) & 0xC0) \|
	282	(pdata->dvs_mode[2] & 0x3F));
	283	max8952_write_reg(max8952, MAX8952_REG_MODE3,
	284	(max8952_read_reg(max8952,
	285	MAX8952_REG_MODE3) & 0xC0) \|
	286	(pdata->dvs_mode[3] & 0x3F));
	287
	288	max8952_write_reg(max8952, MAX8952_REG_SYNC,
	289	(max8952_read_reg(max8952, MAX8952_REG_SYNC) & 0x3F) \|
	290	((pdata->sync_freq & 0x3) << 6));
	291	max8952_write_reg(max8952, MAX8952_REG_RAMP,
	292	(max8952_read_reg(max8952, MAX8952_REG_RAMP) & 0x1F) \|
	293	((pdata->ramp_speed & 0x7) << 5));
	294
	295	i2c_set_clientdata(client, max8952);
	296
da05738e	297	return 0;
202f4f53 MH	298	}
	299
	300	static int __devexit max8952_pmic_remove(struct i2c_client *client)
	301	{
	302	struct max8952_data *max8952 = i2c_get_clientdata(client);
	303	struct max8952_platform_data *pdata = max8952->pdata;
	304	struct regulator_dev *rdev = max8952->rdev;
	305
	306	regulator_unregister(rdev);
	307
	308	gpio_free(pdata->gpio_vid0);
	309	gpio_free(pdata->gpio_vid1);
	310	gpio_free(pdata->gpio_en);
202f4f53 MH	311	return 0;
	312	}
	313
	314	static const struct i2c_device_id max8952_ids[] = {
	315	{ "max8952", 0 },
	316	{ },
	317	};
	318	MODULE_DEVICE_TABLE(i2c, max8952_ids);
	319
	320	static struct i2c_driver max8952_pmic_driver = {
	321	.probe = max8952_pmic_probe,
	322	.remove = __devexit_p(max8952_pmic_remove),
	323	.driver = {
	324	.name = "max8952",
	325	},
	326	.id_table = max8952_ids,
	327	};
	328
	329	static int __init max8952_pmic_init(void)
	330	{
	331	return i2c_add_driver(&max8952_pmic_driver);
	332	}
	333	subsys_initcall(max8952_pmic_init);
	334
	335	static void __exit max8952_pmic_exit(void)
	336	{
	337	i2c_del_driver(&max8952_pmic_driver);
	338	}
	339	module_exit(max8952_pmic_exit);
	340
	341	MODULE_DESCRIPTION("MAXIM 8952 voltage regulator driver");
	342	MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
	343	MODULE_LICENSE("GPL");