[linux.git] / drivers / mfd / max8998.c

/*
 * max8998.c - mfd core driver for the Maxim 8998
 *
 *  Copyright (C) 2009-2010 Samsung Electronics
 *  Kyungmin Park <[email protected]>
 *  Marek Szyprowski <[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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8998.h>
#include <linux/mfd/max8998-private.h>

#define RTC_I2C_ADDR		(0x0c >> 1)

static struct mfd_cell max8998_devs[] = {
	{
		.name = "max8998-pmic",
	}, {
		.name = "max8998-rtc",
	}, {
		.name = "max8998-battery",
	},
};

static struct mfd_cell lp3974_devs[] = {
	{
		.name = "lp3974-pmic",
	}, {
		.name = "lp3974-rtc",
	},
};

int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
{
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&max8998->iolock);
	ret = i2c_smbus_read_byte_data(i2c, reg);
	mutex_unlock(&max8998->iolock);
	if (ret < 0)
		return ret;

	ret &= 0xff;
	*dest = ret;
	return 0;
}
EXPORT_SYMBOL(max8998_read_reg);

int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&max8998->iolock);
	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	mutex_unlock(&max8998->iolock);
	if (ret < 0)
		return ret;

	return 0;
}
EXPORT_SYMBOL(max8998_bulk_read);

int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
{
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&max8998->iolock);
	ret = i2c_smbus_write_byte_data(i2c, reg, value);
	mutex_unlock(&max8998->iolock);
	return ret;
}
EXPORT_SYMBOL(max8998_write_reg);

int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&max8998->iolock);
	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	mutex_unlock(&max8998->iolock);
	if (ret < 0)
		return ret;

	return 0;
}
EXPORT_SYMBOL(max8998_bulk_write);

int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
{
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&max8998->iolock);
	ret = i2c_smbus_read_byte_data(i2c, reg);
	if (ret >= 0) {
		u8 old_val = ret & 0xff;
		u8 new_val = (val & mask) | (old_val & (~mask));
		ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
	}
	mutex_unlock(&max8998->iolock);
	return ret;
}
EXPORT_SYMBOL(max8998_update_reg);

static int max8998_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct max8998_platform_data *pdata = i2c->dev.platform_data;
	struct max8998_dev *max8998;
	int ret = 0;

	max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL);
	if (max8998 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, max8998);
	max8998->dev = &i2c->dev;
	max8998->i2c = i2c;
	max8998->irq = i2c->irq;
	max8998->type = id->driver_data;
	if (pdata) {
		max8998->ono = pdata->ono;
		max8998->irq_base = pdata->irq_base;
		max8998->wakeup = pdata->wakeup;
	}
	mutex_init(&max8998->iolock);

	max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
	i2c_set_clientdata(max8998->rtc, max8998);

	max8998_irq_init(max8998);

	pm_runtime_set_active(max8998->dev);

	switch (id->driver_data) {
	case TYPE_LP3974:
		ret = mfd_add_devices(max8998->dev, -1,
				lp3974_devs, ARRAY_SIZE(lp3974_devs),
				NULL, 0);
		break;
	case TYPE_MAX8998:
		ret = mfd_add_devices(max8998->dev, -1,
				max8998_devs, ARRAY_SIZE(max8998_devs),
				NULL, 0);
		break;
	default:
		ret = -EINVAL;
	}

	if (ret < 0)
		goto err;

	return ret;

err:
	mfd_remove_devices(max8998->dev);
	max8998_irq_exit(max8998);
	i2c_unregister_device(max8998->rtc);
	kfree(max8998);
	return ret;
}

static int max8998_i2c_remove(struct i2c_client *i2c)
{
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);

	mfd_remove_devices(max8998->dev);
	max8998_irq_exit(max8998);
	i2c_unregister_device(max8998->rtc);
	kfree(max8998);

	return 0;
}

static const struct i2c_device_id max8998_i2c_id[] = {
	{ "max8998", TYPE_MAX8998 },
	{ "lp3974", TYPE_LP3974},
	{ }
};
MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);

static int max8998_suspend(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);

	if (max8998->wakeup)
		irq_set_irq_wake(max8998->irq, 1);
	return 0;
}

static int max8998_resume(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);

	if (max8998->wakeup)
		irq_set_irq_wake(max8998->irq, 0);
	/*
	 * In LP3974, if IRQ registers are not "read & clear"
	 * when it's set during sleep, the interrupt becomes
	 * disabled.
	 */
	return max8998_irq_resume(i2c_get_clientdata(i2c));
}

struct max8998_reg_dump {
	u8	addr;
	u8	val;
};
#define SAVE_ITEM(x)	{ .addr = (x), .val = 0x0, }
static struct max8998_reg_dump max8998_dump[] = {
	SAVE_ITEM(MAX8998_REG_IRQM1),
	SAVE_ITEM(MAX8998_REG_IRQM2),
	SAVE_ITEM(MAX8998_REG_IRQM3),
	SAVE_ITEM(MAX8998_REG_IRQM4),
	SAVE_ITEM(MAX8998_REG_STATUSM1),
	SAVE_ITEM(MAX8998_REG_STATUSM2),
	SAVE_ITEM(MAX8998_REG_CHGR1),
	SAVE_ITEM(MAX8998_REG_CHGR2),
	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
	SAVE_ITEM(MAX8998_REG_ONOFF1),
	SAVE_ITEM(MAX8998_REG_ONOFF2),
	SAVE_ITEM(MAX8998_REG_ONOFF3),
	SAVE_ITEM(MAX8998_REG_ONOFF4),
	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
	SAVE_ITEM(MAX8998_REG_LDO4),
	SAVE_ITEM(MAX8998_REG_LDO5),
	SAVE_ITEM(MAX8998_REG_LDO6),
	SAVE_ITEM(MAX8998_REG_LDO7),
	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
	SAVE_ITEM(MAX8998_REG_LDO12),
	SAVE_ITEM(MAX8998_REG_LDO13),
	SAVE_ITEM(MAX8998_REG_LDO14),
	SAVE_ITEM(MAX8998_REG_LDO15),
	SAVE_ITEM(MAX8998_REG_LDO16),
	SAVE_ITEM(MAX8998_REG_LDO17),
	SAVE_ITEM(MAX8998_REG_BKCHR),
	SAVE_ITEM(MAX8998_REG_LBCNFG1),
	SAVE_ITEM(MAX8998_REG_LBCNFG2),
};
/* Save registers before hibernation */
static int max8998_freeze(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	int i;

	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
		max8998_read_reg(i2c, max8998_dump[i].addr,
				&max8998_dump[i].val);

	return 0;
}

/* Restore registers after hibernation */
static int max8998_restore(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	int i;

	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
		max8998_write_reg(i2c, max8998_dump[i].addr,
				max8998_dump[i].val);

	return 0;
}

static const struct dev_pm_ops max8998_pm = {
	.suspend = max8998_suspend,
	.resume = max8998_resume,
	.freeze = max8998_freeze,
	.restore = max8998_restore,
};

static struct i2c_driver max8998_i2c_driver = {
	.driver = {
		   .name = "max8998",
		   .owner = THIS_MODULE,
		   .pm = &max8998_pm,
	},
	.probe = max8998_i2c_probe,
	.remove = max8998_i2c_remove,
	.id_table = max8998_i2c_id,
};

static int __init max8998_i2c_init(void)
{
	return i2c_add_driver(&max8998_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max8998_i2c_init);

static void __exit max8998_i2c_exit(void)
{
	i2c_del_driver(&max8998_i2c_driver);
}
module_exit(max8998_i2c_exit);

MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver");
MODULE_AUTHOR("Kyungmin Park <[email protected]>");
MODULE_LICENSE("GPL");
Commit	Line	Data
156f2528	1	/*
2c7e6f57	2	* max8998.c - mfd core driver for the Maxim 8998
156f2528 KP	3	*
	4	* Copyright (C) 2009-2010 Samsung Electronics
	5	* Kyungmin Park <[email protected]>
	6	* Marek Szyprowski <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/moduleparam.h>
	25	#include <linux/init.h>
	26	#include <linux/slab.h>
	27	#include <linux/i2c.h>
cdd137c9 MH	28	#include <linux/interrupt.h>
cdd137c9 MH	29	#include <linux/pm_runtime.h>
156f2528 KP	30	#include <linux/mutex.h>
	31	#include <linux/mfd/core.h>
	32	#include <linux/mfd/max8998.h>
	33	#include <linux/mfd/max8998-private.h>
	34
9b16c0a4 JS	35	#define RTC_I2C_ADDR (0x0c >> 1)
9b16c0a4 JS	36
156f2528 KP	37	static struct mfd_cell max8998_devs[] = {
	38	{
	39	.name = "max8998-pmic",
9b16c0a4 JS	40	}, {
9b16c0a4 JS	41	.name = "max8998-rtc",
bb4ce970 DK	42	}, {
bb4ce970 DK	43	.name = "max8998-battery",
9b16c0a4	44	},
156f2528 KP	45	};
156f2528 KP	46
337ce5d1 MH	47	static struct mfd_cell lp3974_devs[] = {
	48	{
	49	.name = "lp3974-pmic",
	50	}, {
	51	.name = "lp3974-rtc",
	52	},
	53	};
	54
676e02d7	55	int max8998_read_reg(struct i2c_client i2c, u8 reg, u8 dest)
156f2528	56	{
676e02d7	57	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	58	int ret;
	59
	60	mutex_lock(&max8998->iolock);
676e02d7	61	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	62	mutex_unlock(&max8998->iolock);
	63	if (ret < 0)
	64	return ret;
	65
	66	ret &= 0xff;
	67	*dest = ret;
	68	return 0;
	69	}
676e02d7	70	EXPORT_SYMBOL(max8998_read_reg);
156f2528	71
2c7e6f57 JS	72	int max8998_bulk_read(struct i2c_client i2c, u8 reg, int count, u8 buf)
	73	{
	74	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	75	int ret;
	76
	77	mutex_lock(&max8998->iolock);
	78	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	79	mutex_unlock(&max8998->iolock);
	80	if (ret < 0)
	81	return ret;
	82
	83	return 0;
	84	}
	85	EXPORT_SYMBOL(max8998_bulk_read);
	86
676e02d7	87	int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
156f2528	88	{
676e02d7	89	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	90	int ret;
	91
	92	mutex_lock(&max8998->iolock);
676e02d7	93	ret = i2c_smbus_write_byte_data(i2c, reg, value);
156f2528 KP	94	mutex_unlock(&max8998->iolock);
	95	return ret;
	96	}
676e02d7	97	EXPORT_SYMBOL(max8998_write_reg);
156f2528	98
9b16c0a4 JS	99	int max8998_bulk_write(struct i2c_client i2c, u8 reg, int count, u8 buf)
	100	{
	101	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	102	int ret;
	103
	104	mutex_lock(&max8998->iolock);
	105	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	106	mutex_unlock(&max8998->iolock);
	107	if (ret < 0)
	108	return ret;
	109
	110	return 0;
	111	}
	112	EXPORT_SYMBOL(max8998_bulk_write);
	113
676e02d7	114	int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
156f2528	115	{
676e02d7	116	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	117	int ret;
	118
	119	mutex_lock(&max8998->iolock);
676e02d7	120	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	121	if (ret >= 0) {
	122	u8 old_val = ret & 0xff;
	123	u8 new_val = (val & mask) \| (old_val & (~mask));
676e02d7	124	ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
156f2528 KP	125	}
	126	mutex_unlock(&max8998->iolock);
	127	return ret;
	128	}
676e02d7	129	EXPORT_SYMBOL(max8998_update_reg);
156f2528 KP	130
	131	static int max8998_i2c_probe(struct i2c_client *i2c,
	132	const struct i2c_device_id *id)
	133	{
2c7e6f57	134	struct max8998_platform_data *pdata = i2c->dev.platform_data;
156f2528 KP	135	struct max8998_dev *max8998;
	136	int ret = 0;
	137
	138	max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL);
8f1f151e	139	if (max8998 == NULL)
156f2528	140	return -ENOMEM;
156f2528 KP	141
	142	i2c_set_clientdata(i2c, max8998);
	143	max8998->dev = &i2c->dev;
676e02d7	144	max8998->i2c = i2c;
2c7e6f57	145	max8998->irq = i2c->irq;
509bd476	146	max8998->type = id->driver_data;
2c7e6f57 JS	147	if (pdata) {
	148	max8998->ono = pdata->ono;
	149	max8998->irq_base = pdata->irq_base;
cdd137c9	150	max8998->wakeup = pdata->wakeup;
2c7e6f57	151	}
156f2528 KP	152	mutex_init(&max8998->iolock);
156f2528 KP	153
9b16c0a4 JS	154	max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
	155	i2c_set_clientdata(max8998->rtc, max8998);
	156
2c7e6f57 JS	157	max8998_irq_init(max8998);
2c7e6f57 JS	158
cdd137c9 MH	159	pm_runtime_set_active(max8998->dev);
cdd137c9 MH	160
337ce5d1 MH	161	switch (id->driver_data) {
	162	case TYPE_LP3974:
	163	ret = mfd_add_devices(max8998->dev, -1,
	164	lp3974_devs, ARRAY_SIZE(lp3974_devs),
	165	NULL, 0);
	166	break;
	167	case TYPE_MAX8998:
	168	ret = mfd_add_devices(max8998->dev, -1,
	169	max8998_devs, ARRAY_SIZE(max8998_devs),
	170	NULL, 0);
	171	break;
	172	default:
	173	ret = -EINVAL;
	174	}
	175
156f2528 KP	176	if (ret < 0)
	177	goto err;
	178
	179	return ret;
	180
	181	err:
	182	mfd_remove_devices(max8998->dev);
7484552e AL	183	max8998_irq_exit(max8998);
7484552e AL	184	i2c_unregister_device(max8998->rtc);
156f2528 KP	185	kfree(max8998);
	186	return ret;
	187	}
	188
	189	static int max8998_i2c_remove(struct i2c_client *i2c)
	190	{
	191	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	192
	193	mfd_remove_devices(max8998->dev);
7484552e AL	194	max8998_irq_exit(max8998);
7484552e AL	195	i2c_unregister_device(max8998->rtc);
156f2528 KP	196	kfree(max8998);
	197
	198	return 0;
	199	}
	200
	201	static const struct i2c_device_id max8998_i2c_id[] = {
509bd476 LM	202	{ "max8998", TYPE_MAX8998 },
509bd476 LM	203	{ "lp3974", TYPE_LP3974},
f8539ddc	204	{ }
156f2528 KP	205	};
	206	MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
	207
cdd137c9 MH	208	static int max8998_suspend(struct device *dev)
	209	{
	210	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	211	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	212
	213	if (max8998->wakeup)
d5bb1221	214	irq_set_irq_wake(max8998->irq, 1);
cdd137c9 MH	215	return 0;
	216	}
	217
	218	static int max8998_resume(struct device *dev)
	219	{
	220	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	221	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	222
	223	if (max8998->wakeup)
d5bb1221	224	irq_set_irq_wake(max8998->irq, 0);
cdd137c9 MH	225	/*
	226	* In LP3974, if IRQ registers are not "read & clear"
	227	* when it's set during sleep, the interrupt becomes
	228	* disabled.
	229	*/
	230	return max8998_irq_resume(i2c_get_clientdata(i2c));
	231	}
	232
	233	struct max8998_reg_dump {
	234	u8 addr;
	235	u8 val;
	236	};
	237	#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
44be0a40	238	static struct max8998_reg_dump max8998_dump[] = {
cdd137c9 MH	239	SAVE_ITEM(MAX8998_REG_IRQM1),
	240	SAVE_ITEM(MAX8998_REG_IRQM2),
	241	SAVE_ITEM(MAX8998_REG_IRQM3),
	242	SAVE_ITEM(MAX8998_REG_IRQM4),
	243	SAVE_ITEM(MAX8998_REG_STATUSM1),
	244	SAVE_ITEM(MAX8998_REG_STATUSM2),
	245	SAVE_ITEM(MAX8998_REG_CHGR1),
	246	SAVE_ITEM(MAX8998_REG_CHGR2),
	247	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	248	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	249	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
	250	SAVE_ITEM(MAX8998_REG_ONOFF1),
	251	SAVE_ITEM(MAX8998_REG_ONOFF2),
	252	SAVE_ITEM(MAX8998_REG_ONOFF3),
	253	SAVE_ITEM(MAX8998_REG_ONOFF4),
	254	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
	255	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
	256	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
	257	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
	258	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
	259	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
	260	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
	261	SAVE_ITEM(MAX8998_REG_LDO4),
	262	SAVE_ITEM(MAX8998_REG_LDO5),
	263	SAVE_ITEM(MAX8998_REG_LDO6),
	264	SAVE_ITEM(MAX8998_REG_LDO7),
	265	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
	266	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
	267	SAVE_ITEM(MAX8998_REG_LDO12),
	268	SAVE_ITEM(MAX8998_REG_LDO13),
	269	SAVE_ITEM(MAX8998_REG_LDO14),
	270	SAVE_ITEM(MAX8998_REG_LDO15),
	271	SAVE_ITEM(MAX8998_REG_LDO16),
	272	SAVE_ITEM(MAX8998_REG_LDO17),
	273	SAVE_ITEM(MAX8998_REG_BKCHR),
	274	SAVE_ITEM(MAX8998_REG_LBCNFG1),
	275	SAVE_ITEM(MAX8998_REG_LBCNFG2),
	276	};
	277	/* Save registers before hibernation */
	278	static int max8998_freeze(struct device *dev)
	279	{
	280	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	281	int i;
	282
	283	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	284	max8998_read_reg(i2c, max8998_dump[i].addr,
	285	&max8998_dump[i].val);
	286
	287	return 0;
	288	}
	289
	290	/* Restore registers after hibernation */
	291	static int max8998_restore(struct device *dev)
	292	{
	293	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	294	int i;
	295
	296	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	297	max8998_write_reg(i2c, max8998_dump[i].addr,
	298	max8998_dump[i].val);
	299
	300	return 0;
	301	}
	302
44be0a40	303	static const struct dev_pm_ops max8998_pm = {
cdd137c9 MH	304	.suspend = max8998_suspend,
	305	.resume = max8998_resume,
	306	.freeze = max8998_freeze,
	307	.restore = max8998_restore,
	308	};
	309
156f2528 KP	310	static struct i2c_driver max8998_i2c_driver = {
	311	.driver = {
	312	.name = "max8998",
	313	.owner = THIS_MODULE,
cdd137c9	314	.pm = &max8998_pm,
156f2528 KP	315	},
	316	.probe = max8998_i2c_probe,
	317	.remove = max8998_i2c_remove,
	318	.id_table = max8998_i2c_id,
	319	};
	320
	321	static int __init max8998_i2c_init(void)
	322	{
	323	return i2c_add_driver(&max8998_i2c_driver);
	324	}
	325	/* init early so consumer devices can complete system boot */
	326	subsys_initcall(max8998_i2c_init);
	327
	328	static void __exit max8998_i2c_exit(void)
	329	{
	330	i2c_del_driver(&max8998_i2c_driver);
	331	}
	332	module_exit(max8998_i2c_exit);
	333
	334	MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver");
	335	MODULE_AUTHOR("Kyungmin Park <[email protected]>");
	336	MODULE_LICENSE("GPL");