[linux-2.6-block.git] / drivers / mfd / max8998.c

/*
 * max8998.c - mfd core driver for the Maxim 8998
 *
 *  Copyright (C) 2009-2010 Samsung Electronics
 *  Kyungmin Park <kyungmin.park@samsung.com>
 *  Marek Szyprowski <m.szyprowski@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/err.h>
#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/of.h>
#include <linux/of_irq.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 const struct mfd_cell max8998_devs[] = {
	{
		.name = "max8998-pmic",
	}, {
		.name = "max8998-rtc",
	}, {
		.name = "max8998-battery",
	},
};

static const 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);

#ifdef CONFIG_OF
static const struct of_device_id max8998_dt_match[] = {
	{ .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
	{ .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
	{ .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
	{},
};
MODULE_DEVICE_TABLE(of, max8998_dt_match);
#endif

/*
 * Only the common platform data elements for max8998 are parsed here from the
 * device tree. Other sub-modules of max8998 such as pmic, rtc and others have
 * to parse their own platform data elements from device tree.
 *
 * The max8998 platform data structure is instantiated here and the drivers for
 * the sub-modules need not instantiate another instance while parsing their
 * platform data.
 */
static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
							struct device *dev)
{
	struct max8998_platform_data *pd;

	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	if (!pd)
		return ERR_PTR(-ENOMEM);

	pd->ono = irq_of_parse_and_map(dev->of_node, 1);

	/*
	 * ToDo: the 'wakeup' member in the platform data is more of a linux
	 * specfic information. Hence, there is no binding for that yet and
	 * not parsed here.
	 */
	return pd;
}

static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
						const struct i2c_device_id *id)
{
	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
		const struct of_device_id *match;
		match = of_match_node(max8998_dt_match, i2c->dev.of_node);
		return (unsigned long)match->data;
	}

	return id->driver_data;
}

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

	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
				GFP_KERNEL);
	if (max8998 == NULL)
		return -ENOMEM;

	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
		pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
		if (IS_ERR(pdata)) {
			ret = PTR_ERR(pdata);
			goto err;
		}
	}

	i2c_set_clientdata(i2c, max8998);
	max8998->dev = &i2c->dev;
	max8998->i2c = i2c;
	max8998->irq = i2c->irq;
	max8998->type = max8998_i2c_get_driver_data(i2c, id);
	max8998->pdata = pdata;
	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);
	if (!max8998->rtc) {
		dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
		return -ENODEV;
	}
	i2c_set_clientdata(max8998->rtc, max8998);

	max8998_irq_init(max8998);

	pm_runtime_set_active(max8998->dev);

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

	if (ret < 0)
		goto err;

	device_init_wakeup(max8998->dev, max8998->wakeup);

	return ret;

err:
	mfd_remove_devices(max8998->dev);
	max8998_irq_exit(max8998);
	i2c_unregister_device(max8998->rtc);
	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);

	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 = to_i2c_client(dev);
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);

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

static int max8998_resume(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		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 = to_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 = to_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",
		   .pm = &max8998_pm,
		   .of_match_table = of_match_ptr(max8998_dt_match),
	},
	.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 <kyungmin.park@samsung.com>");
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 <kyungmin.park@samsung.com>
	6	* Marek Szyprowski <m.szyprowski@samsung.com>
	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
ee999fb3	23	#include <linux/err.h>
156f2528 KP	24	#include <linux/module.h>
	25	#include <linux/moduleparam.h>
	26	#include <linux/init.h>
	27	#include <linux/slab.h>
	28	#include <linux/i2c.h>
cdd137c9	29	#include <linux/interrupt.h>
ee999fb3 TF	30	#include <linux/of.h>
ee999fb3 TF	31	#include <linux/of_irq.h>
cdd137c9	32	#include <linux/pm_runtime.h>
156f2528 KP	33	#include <linux/mutex.h>
	34	#include <linux/mfd/core.h>
	35	#include <linux/mfd/max8998.h>
	36	#include <linux/mfd/max8998-private.h>
	37
9b16c0a4 JS	38	#define RTC_I2C_ADDR (0x0c >> 1)
9b16c0a4 JS	39
7c0517b1	40	static const struct mfd_cell max8998_devs[] = {
156f2528 KP	41	{
156f2528 KP	42	.name = "max8998-pmic",
9b16c0a4 JS	43	}, {
9b16c0a4 JS	44	.name = "max8998-rtc",
bb4ce970 DK	45	}, {
bb4ce970 DK	46	.name = "max8998-battery",
9b16c0a4	47	},
156f2528 KP	48	};
156f2528 KP	49
7c0517b1	50	static const struct mfd_cell lp3974_devs[] = {
337ce5d1 MH	51	{
	52	.name = "lp3974-pmic",
	53	}, {
	54	.name = "lp3974-rtc",
	55	},
	56	};
	57
676e02d7	58	int max8998_read_reg(struct i2c_client i2c, u8 reg, u8 dest)
156f2528	59	{
676e02d7	60	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	61	int ret;
	62
	63	mutex_lock(&max8998->iolock);
676e02d7	64	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	65	mutex_unlock(&max8998->iolock);
	66	if (ret < 0)
	67	return ret;
	68
	69	ret &= 0xff;
	70	*dest = ret;
	71	return 0;
	72	}
676e02d7	73	EXPORT_SYMBOL(max8998_read_reg);
156f2528	74
2c7e6f57 JS	75	int max8998_bulk_read(struct i2c_client i2c, u8 reg, int count, u8 buf)
	76	{
	77	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	78	int ret;
	79
	80	mutex_lock(&max8998->iolock);
	81	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	82	mutex_unlock(&max8998->iolock);
	83	if (ret < 0)
	84	return ret;
	85
	86	return 0;
	87	}
	88	EXPORT_SYMBOL(max8998_bulk_read);
	89
676e02d7	90	int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
156f2528	91	{
676e02d7	92	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	93	int ret;
	94
	95	mutex_lock(&max8998->iolock);
676e02d7	96	ret = i2c_smbus_write_byte_data(i2c, reg, value);
156f2528 KP	97	mutex_unlock(&max8998->iolock);
	98	return ret;
	99	}
676e02d7	100	EXPORT_SYMBOL(max8998_write_reg);
156f2528	101
9b16c0a4 JS	102	int max8998_bulk_write(struct i2c_client i2c, u8 reg, int count, u8 buf)
	103	{
	104	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	105	int ret;
	106
	107	mutex_lock(&max8998->iolock);
	108	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	109	mutex_unlock(&max8998->iolock);
	110	if (ret < 0)
	111	return ret;
	112
	113	return 0;
	114	}
	115	EXPORT_SYMBOL(max8998_bulk_write);
	116
676e02d7	117	int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
156f2528	118	{
676e02d7	119	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	120	int ret;
	121
	122	mutex_lock(&max8998->iolock);
676e02d7	123	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	124	if (ret >= 0) {
	125	u8 old_val = ret & 0xff;
	126	u8 new_val = (val & mask) \| (old_val & (~mask));
676e02d7	127	ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
156f2528 KP	128	}
	129	mutex_unlock(&max8998->iolock);
	130	return ret;
	131	}
676e02d7	132	EXPORT_SYMBOL(max8998_update_reg);
156f2528	133
ee999fb3	134	#ifdef CONFIG_OF
e920574d	135	static const struct of_device_id max8998_dt_match[] = {
ee999fb3 TF	136	{ .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
	137	{ .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
	138	{ .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
	139	{},
	140	};
	141	MODULE_DEVICE_TABLE(of, max8998_dt_match);
	142	#endif
	143
	144	/*
	145	* Only the common platform data elements for max8998 are parsed here from the
	146	* device tree. Other sub-modules of max8998 such as pmic, rtc and others have
	147	* to parse their own platform data elements from device tree.
	148	*
	149	* The max8998 platform data structure is instantiated here and the drivers for
	150	* the sub-modules need not instantiate another instance while parsing their
	151	* platform data.
	152	*/
	153	static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
	154	struct device *dev)
	155	{
	156	struct max8998_platform_data *pd;
	157
	158	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	159	if (!pd)
	160	return ERR_PTR(-ENOMEM);
	161
	162	pd->ono = irq_of_parse_and_map(dev->of_node, 1);
	163
	164	/*
	165	* ToDo: the 'wakeup' member in the platform data is more of a linux
	166	* specfic information. Hence, there is no binding for that yet and
	167	* not parsed here.
	168	*/
	169	return pd;
	170	}
	171
8bace2d5	172	static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
ee999fb3 TF	173	const struct i2c_device_id *id)
	174	{
	175	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
	176	const struct of_device_id *match;
	177	match = of_match_node(max8998_dt_match, i2c->dev.of_node);
8bace2d5	178	return (unsigned long)match->data;
ee999fb3 TF	179	}
ee999fb3 TF	180
8bace2d5	181	return id->driver_data;
ee999fb3 TF	182	}
ee999fb3 TF	183
156f2528 KP	184	static int max8998_i2c_probe(struct i2c_client *i2c,
	185	const struct i2c_device_id *id)
	186	{
334a41ce	187	struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
156f2528 KP	188	struct max8998_dev *max8998;
	189	int ret = 0;
	190
0010dd38 JH	191	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
0010dd38 JH	192	GFP_KERNEL);
8f1f151e	193	if (max8998 == NULL)
156f2528	194	return -ENOMEM;
156f2528	195
ee999fb3 TF	196	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
	197	pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
	198	if (IS_ERR(pdata)) {
	199	ret = PTR_ERR(pdata);
	200	goto err;
	201	}
	202	}
	203
156f2528 KP	204	i2c_set_clientdata(i2c, max8998);
156f2528 KP	205	max8998->dev = &i2c->dev;
676e02d7	206	max8998->i2c = i2c;
2c7e6f57	207	max8998->irq = i2c->irq;
ee999fb3 TF	208	max8998->type = max8998_i2c_get_driver_data(i2c, id);
ee999fb3 TF	209	max8998->pdata = pdata;
2c7e6f57 JS	210	if (pdata) {
	211	max8998->ono = pdata->ono;
	212	max8998->irq_base = pdata->irq_base;
cdd137c9	213	max8998->wakeup = pdata->wakeup;
2c7e6f57	214	}
156f2528 KP	215	mutex_init(&max8998->iolock);
156f2528 KP	216
9b16c0a4	217	max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
ed26f87b KK	218	if (!max8998->rtc) {
	219	dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
	220	return -ENODEV;
	221	}
9b16c0a4 JS	222	i2c_set_clientdata(max8998->rtc, max8998);
9b16c0a4 JS	223
2c7e6f57 JS	224	max8998_irq_init(max8998);
2c7e6f57 JS	225
cdd137c9 MH	226	pm_runtime_set_active(max8998->dev);
cdd137c9 MH	227
ee999fb3	228	switch (max8998->type) {
337ce5d1 MH	229	case TYPE_LP3974:
337ce5d1 MH	230	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	231	lp3974_devs, ARRAY_SIZE(lp3974_devs),
0848c94f MB	232	NULL, 0, NULL);
337ce5d1 MH	233	break;
	234	case TYPE_MAX8998:
	235	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	236	max8998_devs, ARRAY_SIZE(max8998_devs),
0848c94f MB	237	NULL, 0, NULL);
337ce5d1 MH	238	break;
	239	default:
	240	ret = -EINVAL;
	241	}
	242
156f2528 KP	243	if (ret < 0)
	244	goto err;
	245
7ef73598 JC	246	device_init_wakeup(max8998->dev, max8998->wakeup);
7ef73598 JC	247
156f2528 KP	248	return ret;
	249
	250	err:
	251	mfd_remove_devices(max8998->dev);
7484552e AL	252	max8998_irq_exit(max8998);
7484552e AL	253	i2c_unregister_device(max8998->rtc);
156f2528 KP	254	return ret;
	255	}
	256
	257	static int max8998_i2c_remove(struct i2c_client *i2c)
	258	{
	259	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	260
	261	mfd_remove_devices(max8998->dev);
7484552e AL	262	max8998_irq_exit(max8998);
7484552e AL	263	i2c_unregister_device(max8998->rtc);
156f2528 KP	264
	265	return 0;
	266	}
	267
	268	static const struct i2c_device_id max8998_i2c_id[] = {
509bd476 LM	269	{ "max8998", TYPE_MAX8998 },
509bd476 LM	270	{ "lp3974", TYPE_LP3974},
f8539ddc	271	{ }
156f2528 KP	272	};
	273	MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
	274
cdd137c9 MH	275	static int max8998_suspend(struct device *dev)
cdd137c9 MH	276	{
1b5420e1	277	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	278	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	279
7ef73598	280	if (device_may_wakeup(dev))
d5bb1221	281	irq_set_irq_wake(max8998->irq, 1);
cdd137c9 MH	282	return 0;
	283	}
	284
	285	static int max8998_resume(struct device *dev)
	286	{
1b5420e1	287	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	288	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	289
7ef73598	290	if (device_may_wakeup(dev))
d5bb1221	291	irq_set_irq_wake(max8998->irq, 0);
cdd137c9 MH	292	/*
	293	* In LP3974, if IRQ registers are not "read & clear"
	294	* when it's set during sleep, the interrupt becomes
	295	* disabled.
	296	*/
	297	return max8998_irq_resume(i2c_get_clientdata(i2c));
	298	}
	299
	300	struct max8998_reg_dump {
	301	u8 addr;
	302	u8 val;
	303	};
	304	#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
44be0a40	305	static struct max8998_reg_dump max8998_dump[] = {
cdd137c9 MH	306	SAVE_ITEM(MAX8998_REG_IRQM1),
	307	SAVE_ITEM(MAX8998_REG_IRQM2),
	308	SAVE_ITEM(MAX8998_REG_IRQM3),
	309	SAVE_ITEM(MAX8998_REG_IRQM4),
	310	SAVE_ITEM(MAX8998_REG_STATUSM1),
	311	SAVE_ITEM(MAX8998_REG_STATUSM2),
	312	SAVE_ITEM(MAX8998_REG_CHGR1),
	313	SAVE_ITEM(MAX8998_REG_CHGR2),
	314	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	315	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	316	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
	317	SAVE_ITEM(MAX8998_REG_ONOFF1),
	318	SAVE_ITEM(MAX8998_REG_ONOFF2),
	319	SAVE_ITEM(MAX8998_REG_ONOFF3),
	320	SAVE_ITEM(MAX8998_REG_ONOFF4),
	321	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
	322	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
	323	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
	324	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
	325	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
	326	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
	327	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
	328	SAVE_ITEM(MAX8998_REG_LDO4),
	329	SAVE_ITEM(MAX8998_REG_LDO5),
	330	SAVE_ITEM(MAX8998_REG_LDO6),
	331	SAVE_ITEM(MAX8998_REG_LDO7),
	332	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
	333	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
	334	SAVE_ITEM(MAX8998_REG_LDO12),
	335	SAVE_ITEM(MAX8998_REG_LDO13),
	336	SAVE_ITEM(MAX8998_REG_LDO14),
	337	SAVE_ITEM(MAX8998_REG_LDO15),
	338	SAVE_ITEM(MAX8998_REG_LDO16),
	339	SAVE_ITEM(MAX8998_REG_LDO17),
	340	SAVE_ITEM(MAX8998_REG_BKCHR),
	341	SAVE_ITEM(MAX8998_REG_LBCNFG1),
	342	SAVE_ITEM(MAX8998_REG_LBCNFG2),
	343	};
	344	/* Save registers before hibernation */
	345	static int max8998_freeze(struct device *dev)
	346	{
1b5420e1	347	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	348	int i;
	349
	350	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	351	max8998_read_reg(i2c, max8998_dump[i].addr,
	352	&max8998_dump[i].val);
	353
	354	return 0;
	355	}
	356
	357	/* Restore registers after hibernation */
	358	static int max8998_restore(struct device *dev)
	359	{
1b5420e1	360	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	361	int i;
	362
	363	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	364	max8998_write_reg(i2c, max8998_dump[i].addr,
	365	max8998_dump[i].val);
	366
	367	return 0;
	368	}
	369
44be0a40	370	static const struct dev_pm_ops max8998_pm = {
cdd137c9 MH	371	.suspend = max8998_suspend,
	372	.resume = max8998_resume,
	373	.freeze = max8998_freeze,
	374	.restore = max8998_restore,
	375	};
	376
156f2528 KP	377	static struct i2c_driver max8998_i2c_driver = {
	378	.driver = {
	379	.name = "max8998",
cdd137c9	380	.pm = &max8998_pm,
ee999fb3	381	.of_match_table = of_match_ptr(max8998_dt_match),
156f2528 KP	382	},
	383	.probe = max8998_i2c_probe,
	384	.remove = max8998_i2c_remove,
	385	.id_table = max8998_i2c_id,
	386	};
	387
	388	static int __init max8998_i2c_init(void)
	389	{
	390	return i2c_add_driver(&max8998_i2c_driver);
	391	}
	392	/* init early so consumer devices can complete system boot */
	393	subsys_initcall(max8998_i2c_init);
	394
	395	static void __exit max8998_i2c_exit(void)
	396	{
	397	i2c_del_driver(&max8998_i2c_driver);
	398	}
	399	module_exit(max8998_i2c_exit);
	400
	401	MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver");
	402	MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
	403	MODULE_LICENSE("GPL");