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

// SPDX-License-Identifier: GPL-2.0+
//
// max8998.c - mfd core driver for the Maxim 8998
//
//  Copyright (C) 2009-2010 Samsung Electronics
//  Kyungmin Park <[email protected]>
//  Marek Szyprowski <[email protected]>

#include <linux/err.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 },
	{},
};
#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 int max8998_i2c_probe(struct i2c_client *i2c)
{
	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))
			return PTR_ERR(pdata);
	}

	i2c_set_clientdata(i2c, max8998);
	max8998->dev = &i2c->dev;
	max8998->i2c = i2c;
	max8998->irq = i2c->irq;
	max8998->type = (uintptr_t)i2c_get_match_data(i2c);
	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_device(i2c->adapter, RTC_I2C_ADDR);
	if (IS_ERR(max8998->rtc)) {
		dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
		return PTR_ERR(max8998->rtc);
	}
	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 const struct i2c_device_id max8998_i2c_id[] = {
	{ "max8998", TYPE_MAX8998 },
	{ "lp3974", TYPE_LP3974},
	{ }
};

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,
		   .suppress_bind_attrs = true,
		   .of_match_table = of_match_ptr(max8998_dt_match),
	},
	.probe = max8998_i2c_probe,
	.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);
Commit	Line	Data
d7d8d7a2 KK	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// max8998.c - mfd core driver for the Maxim 8998
	4	//
	5	// Copyright (C) 2009-2010 Samsung Electronics
	6	// Kyungmin Park <[email protected]>
	7	// Marek Szyprowski <[email protected]>
156f2528	8
ee999fb3	9	#include <linux/err.h>
156f2528 KP	10	#include <linux/init.h>
	11	#include <linux/slab.h>
	12	#include <linux/i2c.h>
cdd137c9	13	#include <linux/interrupt.h>
ee999fb3 TF	14	#include <linux/of.h>
ee999fb3 TF	15	#include <linux/of_irq.h>
cdd137c9	16	#include <linux/pm_runtime.h>
156f2528 KP	17	#include <linux/mutex.h>
	18	#include <linux/mfd/core.h>
	19	#include <linux/mfd/max8998.h>
	20	#include <linux/mfd/max8998-private.h>
	21
9b16c0a4 JS	22	#define RTC_I2C_ADDR (0x0c >> 1)
9b16c0a4 JS	23
7c0517b1	24	static const struct mfd_cell max8998_devs[] = {
156f2528 KP	25	{
156f2528 KP	26	.name = "max8998-pmic",
9b16c0a4 JS	27	}, {
9b16c0a4 JS	28	.name = "max8998-rtc",
bb4ce970 DK	29	}, {
bb4ce970 DK	30	.name = "max8998-battery",
9b16c0a4	31	},
156f2528 KP	32	};
156f2528 KP	33
7c0517b1	34	static const struct mfd_cell lp3974_devs[] = {
337ce5d1 MH	35	{
	36	.name = "lp3974-pmic",
	37	}, {
	38	.name = "lp3974-rtc",
	39	},
	40	};
	41
676e02d7	42	int max8998_read_reg(struct i2c_client i2c, u8 reg, u8 dest)
156f2528	43	{
676e02d7	44	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	45	int ret;
	46
	47	mutex_lock(&max8998->iolock);
676e02d7	48	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	49	mutex_unlock(&max8998->iolock);
	50	if (ret < 0)
	51	return ret;
	52
	53	ret &= 0xff;
	54	*dest = ret;
	55	return 0;
	56	}
676e02d7	57	EXPORT_SYMBOL(max8998_read_reg);
156f2528	58
2c7e6f57 JS	59	int max8998_bulk_read(struct i2c_client i2c, u8 reg, int count, u8 buf)
	60	{
	61	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	62	int ret;
	63
	64	mutex_lock(&max8998->iolock);
	65	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	66	mutex_unlock(&max8998->iolock);
	67	if (ret < 0)
	68	return ret;
	69
	70	return 0;
	71	}
	72	EXPORT_SYMBOL(max8998_bulk_read);
	73
676e02d7	74	int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
156f2528	75	{
676e02d7	76	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	77	int ret;
	78
	79	mutex_lock(&max8998->iolock);
676e02d7	80	ret = i2c_smbus_write_byte_data(i2c, reg, value);
156f2528 KP	81	mutex_unlock(&max8998->iolock);
	82	return ret;
	83	}
676e02d7	84	EXPORT_SYMBOL(max8998_write_reg);
156f2528	85
9b16c0a4 JS	86	int max8998_bulk_write(struct i2c_client i2c, u8 reg, int count, u8 buf)
	87	{
	88	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	89	int ret;
	90
	91	mutex_lock(&max8998->iolock);
	92	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	93	mutex_unlock(&max8998->iolock);
	94	if (ret < 0)
	95	return ret;
	96
	97	return 0;
	98	}
	99	EXPORT_SYMBOL(max8998_bulk_write);
	100
676e02d7	101	int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
156f2528	102	{
676e02d7	103	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	104	int ret;
	105
	106	mutex_lock(&max8998->iolock);
676e02d7	107	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	108	if (ret >= 0) {
	109	u8 old_val = ret & 0xff;
	110	u8 new_val = (val & mask) \| (old_val & (~mask));
676e02d7	111	ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
156f2528 KP	112	}
	113	mutex_unlock(&max8998->iolock);
	114	return ret;
	115	}
676e02d7	116	EXPORT_SYMBOL(max8998_update_reg);
156f2528	117
ee999fb3	118	#ifdef CONFIG_OF
e920574d	119	static const struct of_device_id max8998_dt_match[] = {
ee999fb3 TF	120	{ .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
	121	{ .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
	122	{ .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
	123	{},
	124	};
ee999fb3 TF	125	#endif
	126
	127	/*
	128	* Only the common platform data elements for max8998 are parsed here from the
	129	* device tree. Other sub-modules of max8998 such as pmic, rtc and others have
	130	* to parse their own platform data elements from device tree.
	131	*
	132	* The max8998 platform data structure is instantiated here and the drivers for
	133	* the sub-modules need not instantiate another instance while parsing their
	134	* platform data.
	135	*/
	136	static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
	137	struct device *dev)
	138	{
	139	struct max8998_platform_data *pd;
	140
	141	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	142	if (!pd)
	143	return ERR_PTR(-ENOMEM);
	144
	145	pd->ono = irq_of_parse_and_map(dev->of_node, 1);
	146
	147	/*
	148	* ToDo: the 'wakeup' member in the platform data is more of a linux
	149	* specfic information. Hence, there is no binding for that yet and
	150	* not parsed here.
	151	*/
	152	return pd;
	153	}
	154
833eaaf7	155	static int max8998_i2c_probe(struct i2c_client *i2c)
156f2528	156	{
334a41ce	157	struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
156f2528 KP	158	struct max8998_dev *max8998;
	159	int ret = 0;
	160
0010dd38 JH	161	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
0010dd38 JH	162	GFP_KERNEL);
8f1f151e	163	if (max8998 == NULL)
156f2528	164	return -ENOMEM;
156f2528	165
ee999fb3 TF	166	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
ee999fb3 TF	167	pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
2042f3c2 CJ	168	if (IS_ERR(pdata))
2042f3c2 CJ	169	return PTR_ERR(pdata);
ee999fb3 TF	170	}
ee999fb3 TF	171
156f2528 KP	172	i2c_set_clientdata(i2c, max8998);
156f2528 KP	173	max8998->dev = &i2c->dev;
676e02d7	174	max8998->i2c = i2c;
2c7e6f57	175	max8998->irq = i2c->irq;
c4974eea	176	max8998->type = (uintptr_t)i2c_get_match_data(i2c);
ee999fb3	177	max8998->pdata = pdata;
2c7e6f57 JS	178	if (pdata) {
	179	max8998->ono = pdata->ono;
	180	max8998->irq_base = pdata->irq_base;
cdd137c9	181	max8998->wakeup = pdata->wakeup;
2c7e6f57	182	}
156f2528 KP	183	mutex_init(&max8998->iolock);
156f2528 KP	184
7a99c8f3 WS	185	max8998->rtc = i2c_new_dummy_device(i2c->adapter, RTC_I2C_ADDR);
7a99c8f3 WS	186	if (IS_ERR(max8998->rtc)) {
ed26f87b	187	dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
7a99c8f3	188	return PTR_ERR(max8998->rtc);
ed26f87b	189	}
9b16c0a4 JS	190	i2c_set_clientdata(max8998->rtc, max8998);
9b16c0a4 JS	191
2c7e6f57 JS	192	max8998_irq_init(max8998);
2c7e6f57 JS	193
cdd137c9 MH	194	pm_runtime_set_active(max8998->dev);
cdd137c9 MH	195
ee999fb3	196	switch (max8998->type) {
337ce5d1 MH	197	case TYPE_LP3974:
337ce5d1 MH	198	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	199	lp3974_devs, ARRAY_SIZE(lp3974_devs),
0848c94f MB	200	NULL, 0, NULL);
337ce5d1 MH	201	break;
	202	case TYPE_MAX8998:
	203	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	204	max8998_devs, ARRAY_SIZE(max8998_devs),
0848c94f MB	205	NULL, 0, NULL);
337ce5d1 MH	206	break;
	207	default:
	208	ret = -EINVAL;
	209	}
	210
156f2528 KP	211	if (ret < 0)
	212	goto err;
	213
7ef73598 JC	214	device_init_wakeup(max8998->dev, max8998->wakeup);
7ef73598 JC	215
156f2528 KP	216	return ret;
	217
	218	err:
	219	mfd_remove_devices(max8998->dev);
7484552e AL	220	max8998_irq_exit(max8998);
7484552e AL	221	i2c_unregister_device(max8998->rtc);
156f2528 KP	222	return ret;
	223	}
	224
156f2528	225	static const struct i2c_device_id max8998_i2c_id[] = {
509bd476 LM	226	{ "max8998", TYPE_MAX8998 },
509bd476 LM	227	{ "lp3974", TYPE_LP3974},
f8539ddc	228	{ }
156f2528	229	};
156f2528	230
cdd137c9 MH	231	static int max8998_suspend(struct device *dev)
cdd137c9 MH	232	{
1b5420e1	233	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	234	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	235
7ef73598	236	if (device_may_wakeup(dev))
d5bb1221	237	irq_set_irq_wake(max8998->irq, 1);
cdd137c9 MH	238	return 0;
	239	}
	240
	241	static int max8998_resume(struct device *dev)
	242	{
1b5420e1	243	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	244	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	245
7ef73598	246	if (device_may_wakeup(dev))
d5bb1221	247	irq_set_irq_wake(max8998->irq, 0);
cdd137c9 MH	248	/*
	249	* In LP3974, if IRQ registers are not "read & clear"
	250	* when it's set during sleep, the interrupt becomes
	251	* disabled.
	252	*/
	253	return max8998_irq_resume(i2c_get_clientdata(i2c));
	254	}
	255
	256	struct max8998_reg_dump {
	257	u8 addr;
	258	u8 val;
	259	};
	260	#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
44be0a40	261	static struct max8998_reg_dump max8998_dump[] = {
cdd137c9 MH	262	SAVE_ITEM(MAX8998_REG_IRQM1),
	263	SAVE_ITEM(MAX8998_REG_IRQM2),
	264	SAVE_ITEM(MAX8998_REG_IRQM3),
	265	SAVE_ITEM(MAX8998_REG_IRQM4),
	266	SAVE_ITEM(MAX8998_REG_STATUSM1),
	267	SAVE_ITEM(MAX8998_REG_STATUSM2),
	268	SAVE_ITEM(MAX8998_REG_CHGR1),
	269	SAVE_ITEM(MAX8998_REG_CHGR2),
	270	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	271	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	272	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
	273	SAVE_ITEM(MAX8998_REG_ONOFF1),
	274	SAVE_ITEM(MAX8998_REG_ONOFF2),
	275	SAVE_ITEM(MAX8998_REG_ONOFF3),
	276	SAVE_ITEM(MAX8998_REG_ONOFF4),
	277	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
	278	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
	279	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
	280	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
	281	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
	282	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
	283	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
	284	SAVE_ITEM(MAX8998_REG_LDO4),
	285	SAVE_ITEM(MAX8998_REG_LDO5),
	286	SAVE_ITEM(MAX8998_REG_LDO6),
	287	SAVE_ITEM(MAX8998_REG_LDO7),
	288	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
	289	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
	290	SAVE_ITEM(MAX8998_REG_LDO12),
	291	SAVE_ITEM(MAX8998_REG_LDO13),
	292	SAVE_ITEM(MAX8998_REG_LDO14),
	293	SAVE_ITEM(MAX8998_REG_LDO15),
	294	SAVE_ITEM(MAX8998_REG_LDO16),
	295	SAVE_ITEM(MAX8998_REG_LDO17),
	296	SAVE_ITEM(MAX8998_REG_BKCHR),
	297	SAVE_ITEM(MAX8998_REG_LBCNFG1),
	298	SAVE_ITEM(MAX8998_REG_LBCNFG2),
	299	};
	300	/* Save registers before hibernation */
	301	static int max8998_freeze(struct device *dev)
	302	{
1b5420e1	303	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	304	int i;
	305
	306	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	307	max8998_read_reg(i2c, max8998_dump[i].addr,
	308	&max8998_dump[i].val);
	309
	310	return 0;
	311	}
	312
	313	/* Restore registers after hibernation */
	314	static int max8998_restore(struct device *dev)
	315	{
1b5420e1	316	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	317	int i;
	318
	319	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	320	max8998_write_reg(i2c, max8998_dump[i].addr,
	321	max8998_dump[i].val);
	322
	323	return 0;
	324	}
	325
44be0a40	326	static const struct dev_pm_ops max8998_pm = {
cdd137c9 MH	327	.suspend = max8998_suspend,
	328	.resume = max8998_resume,
	329	.freeze = max8998_freeze,
	330	.restore = max8998_restore,
	331	};
	332
156f2528 KP	333	static struct i2c_driver max8998_i2c_driver = {
	334	.driver = {
	335	.name = "max8998",
cdd137c9	336	.pm = &max8998_pm,
b9e38338	337	.suppress_bind_attrs = true,
ee999fb3	338	.of_match_table = of_match_ptr(max8998_dt_match),
156f2528	339	},
9816d859	340	.probe = max8998_i2c_probe,
156f2528 KP	341	.id_table = max8998_i2c_id,
	342	};
	343
	344	static int __init max8998_i2c_init(void)
	345	{
	346	return i2c_add_driver(&max8998_i2c_driver);
	347	}
	348	/* init early so consumer devices can complete system boot */
	349	subsys_initcall(max8998_i2c_init);