[linux-2.6-block.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 <kyungmin.park@samsung.com>
//  Marek Szyprowski <m.szyprowski@samsung.com>

#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_device.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 inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
						const struct i2c_device_id *id)
{
	if (i2c->dev.of_node)
		return (unsigned long)of_device_get_match_data(&i2c->dev);

	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))
			return PTR_ERR(pdata);
	}

	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_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 <kyungmin.park@samsung.com>
	7	// Marek Szyprowski <m.szyprowski@samsung.com>
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	14	#include <linux/of.h>
fac61e69	15	#include <linux/of_device.h>
ee999fb3	16	#include <linux/of_irq.h>
cdd137c9	17	#include <linux/pm_runtime.h>
156f2528 KP	18	#include <linux/mutex.h>
	19	#include <linux/mfd/core.h>
	20	#include <linux/mfd/max8998.h>
	21	#include <linux/mfd/max8998-private.h>
	22
9b16c0a4 JS	23	#define RTC_I2C_ADDR (0x0c >> 1)
9b16c0a4 JS	24
7c0517b1	25	static const struct mfd_cell max8998_devs[] = {
156f2528 KP	26	{
156f2528 KP	27	.name = "max8998-pmic",
9b16c0a4 JS	28	}, {
9b16c0a4 JS	29	.name = "max8998-rtc",
bb4ce970 DK	30	}, {
bb4ce970 DK	31	.name = "max8998-battery",
9b16c0a4	32	},
156f2528 KP	33	};
156f2528 KP	34
7c0517b1	35	static const struct mfd_cell lp3974_devs[] = {
337ce5d1 MH	36	{
	37	.name = "lp3974-pmic",
	38	}, {
	39	.name = "lp3974-rtc",
	40	},
	41	};
	42
676e02d7	43	int max8998_read_reg(struct i2c_client i2c, u8 reg, u8 dest)
156f2528	44	{
676e02d7	45	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	46	int ret;
	47
	48	mutex_lock(&max8998->iolock);
676e02d7	49	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	50	mutex_unlock(&max8998->iolock);
	51	if (ret < 0)
	52	return ret;
	53
	54	ret &= 0xff;
	55	*dest = ret;
	56	return 0;
	57	}
676e02d7	58	EXPORT_SYMBOL(max8998_read_reg);
156f2528	59
2c7e6f57 JS	60	int max8998_bulk_read(struct i2c_client i2c, u8 reg, int count, u8 buf)
	61	{
	62	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	63	int ret;
	64
	65	mutex_lock(&max8998->iolock);
	66	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	67	mutex_unlock(&max8998->iolock);
	68	if (ret < 0)
	69	return ret;
	70
	71	return 0;
	72	}
	73	EXPORT_SYMBOL(max8998_bulk_read);
	74
676e02d7	75	int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
156f2528	76	{
676e02d7	77	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	78	int ret;
	79
	80	mutex_lock(&max8998->iolock);
676e02d7	81	ret = i2c_smbus_write_byte_data(i2c, reg, value);
156f2528 KP	82	mutex_unlock(&max8998->iolock);
	83	return ret;
	84	}
676e02d7	85	EXPORT_SYMBOL(max8998_write_reg);
156f2528	86
9b16c0a4 JS	87	int max8998_bulk_write(struct i2c_client i2c, u8 reg, int count, u8 buf)
	88	{
	89	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	90	int ret;
	91
	92	mutex_lock(&max8998->iolock);
	93	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	94	mutex_unlock(&max8998->iolock);
	95	if (ret < 0)
	96	return ret;
	97
	98	return 0;
	99	}
	100	EXPORT_SYMBOL(max8998_bulk_write);
	101
676e02d7	102	int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
156f2528	103	{
676e02d7	104	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	105	int ret;
	106
	107	mutex_lock(&max8998->iolock);
676e02d7	108	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	109	if (ret >= 0) {
	110	u8 old_val = ret & 0xff;
	111	u8 new_val = (val & mask) \| (old_val & (~mask));
676e02d7	112	ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
156f2528 KP	113	}
	114	mutex_unlock(&max8998->iolock);
	115	return ret;
	116	}
676e02d7	117	EXPORT_SYMBOL(max8998_update_reg);
156f2528	118
ee999fb3	119	#ifdef CONFIG_OF
e920574d	120	static const struct of_device_id max8998_dt_match[] = {
ee999fb3 TF	121	{ .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
	122	{ .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
	123	{ .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
	124	{},
	125	};
ee999fb3 TF	126	#endif
	127
	128	/*
	129	* Only the common platform data elements for max8998 are parsed here from the
	130	* device tree. Other sub-modules of max8998 such as pmic, rtc and others have
	131	* to parse their own platform data elements from device tree.
	132	*
	133	* The max8998 platform data structure is instantiated here and the drivers for
	134	* the sub-modules need not instantiate another instance while parsing their
	135	* platform data.
	136	*/
	137	static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
	138	struct device *dev)
	139	{
	140	struct max8998_platform_data *pd;
	141
	142	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	143	if (!pd)
	144	return ERR_PTR(-ENOMEM);
	145
	146	pd->ono = irq_of_parse_and_map(dev->of_node, 1);
	147
	148	/*
	149	* ToDo: the 'wakeup' member in the platform data is more of a linux
	150	* specfic information. Hence, there is no binding for that yet and
	151	* not parsed here.
	152	*/
	153	return pd;
	154	}
	155
8bace2d5	156	static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
ee999fb3 TF	157	const struct i2c_device_id *id)
ee999fb3 TF	158	{
fac61e69 KK	159	if (i2c->dev.of_node)
fac61e69 KK	160	return (unsigned long)of_device_get_match_data(&i2c->dev);
ee999fb3	161
8bace2d5	162	return id->driver_data;
ee999fb3 TF	163	}
ee999fb3 TF	164
156f2528 KP	165	static int max8998_i2c_probe(struct i2c_client *i2c,
	166	const struct i2c_device_id *id)
	167	{
334a41ce	168	struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
156f2528 KP	169	struct max8998_dev *max8998;
	170	int ret = 0;
	171
0010dd38 JH	172	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
0010dd38 JH	173	GFP_KERNEL);
8f1f151e	174	if (max8998 == NULL)
156f2528	175	return -ENOMEM;
156f2528	176
ee999fb3 TF	177	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
ee999fb3 TF	178	pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
2042f3c2 CJ	179	if (IS_ERR(pdata))
2042f3c2 CJ	180	return PTR_ERR(pdata);
ee999fb3 TF	181	}
ee999fb3 TF	182
156f2528 KP	183	i2c_set_clientdata(i2c, max8998);
156f2528 KP	184	max8998->dev = &i2c->dev;
676e02d7	185	max8998->i2c = i2c;
2c7e6f57	186	max8998->irq = i2c->irq;
ee999fb3 TF	187	max8998->type = max8998_i2c_get_driver_data(i2c, id);
ee999fb3 TF	188	max8998->pdata = pdata;
2c7e6f57 JS	189	if (pdata) {
	190	max8998->ono = pdata->ono;
	191	max8998->irq_base = pdata->irq_base;
cdd137c9	192	max8998->wakeup = pdata->wakeup;
2c7e6f57	193	}
156f2528 KP	194	mutex_init(&max8998->iolock);
156f2528 KP	195
7a99c8f3 WS	196	max8998->rtc = i2c_new_dummy_device(i2c->adapter, RTC_I2C_ADDR);
7a99c8f3 WS	197	if (IS_ERR(max8998->rtc)) {
ed26f87b	198	dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
7a99c8f3	199	return PTR_ERR(max8998->rtc);
ed26f87b	200	}
9b16c0a4 JS	201	i2c_set_clientdata(max8998->rtc, max8998);
9b16c0a4 JS	202
2c7e6f57 JS	203	max8998_irq_init(max8998);
2c7e6f57 JS	204
cdd137c9 MH	205	pm_runtime_set_active(max8998->dev);
cdd137c9 MH	206
ee999fb3	207	switch (max8998->type) {
337ce5d1 MH	208	case TYPE_LP3974:
337ce5d1 MH	209	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	210	lp3974_devs, ARRAY_SIZE(lp3974_devs),
0848c94f MB	211	NULL, 0, NULL);
337ce5d1 MH	212	break;
	213	case TYPE_MAX8998:
	214	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	215	max8998_devs, ARRAY_SIZE(max8998_devs),
0848c94f MB	216	NULL, 0, NULL);
337ce5d1 MH	217	break;
	218	default:
	219	ret = -EINVAL;
	220	}
	221
156f2528 KP	222	if (ret < 0)
	223	goto err;
	224
7ef73598 JC	225	device_init_wakeup(max8998->dev, max8998->wakeup);
7ef73598 JC	226
156f2528 KP	227	return ret;
	228
	229	err:
	230	mfd_remove_devices(max8998->dev);
7484552e AL	231	max8998_irq_exit(max8998);
7484552e AL	232	i2c_unregister_device(max8998->rtc);
156f2528 KP	233	return ret;
	234	}
	235
156f2528	236	static const struct i2c_device_id max8998_i2c_id[] = {
509bd476 LM	237	{ "max8998", TYPE_MAX8998 },
509bd476 LM	238	{ "lp3974", TYPE_LP3974},
f8539ddc	239	{ }
156f2528	240	};
156f2528	241
cdd137c9 MH	242	static int max8998_suspend(struct device *dev)
cdd137c9 MH	243	{
1b5420e1	244	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	245	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	246
7ef73598	247	if (device_may_wakeup(dev))
d5bb1221	248	irq_set_irq_wake(max8998->irq, 1);
cdd137c9 MH	249	return 0;
	250	}
	251
	252	static int max8998_resume(struct device *dev)
	253	{
1b5420e1	254	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	255	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	256
7ef73598	257	if (device_may_wakeup(dev))
d5bb1221	258	irq_set_irq_wake(max8998->irq, 0);
cdd137c9 MH	259	/*
	260	* In LP3974, if IRQ registers are not "read & clear"
	261	* when it's set during sleep, the interrupt becomes
	262	* disabled.
	263	*/
	264	return max8998_irq_resume(i2c_get_clientdata(i2c));
	265	}
	266
	267	struct max8998_reg_dump {
	268	u8 addr;
	269	u8 val;
	270	};
	271	#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
44be0a40	272	static struct max8998_reg_dump max8998_dump[] = {
cdd137c9 MH	273	SAVE_ITEM(MAX8998_REG_IRQM1),
	274	SAVE_ITEM(MAX8998_REG_IRQM2),
	275	SAVE_ITEM(MAX8998_REG_IRQM3),
	276	SAVE_ITEM(MAX8998_REG_IRQM4),
	277	SAVE_ITEM(MAX8998_REG_STATUSM1),
	278	SAVE_ITEM(MAX8998_REG_STATUSM2),
	279	SAVE_ITEM(MAX8998_REG_CHGR1),
	280	SAVE_ITEM(MAX8998_REG_CHGR2),
	281	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	282	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	283	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
	284	SAVE_ITEM(MAX8998_REG_ONOFF1),
	285	SAVE_ITEM(MAX8998_REG_ONOFF2),
	286	SAVE_ITEM(MAX8998_REG_ONOFF3),
	287	SAVE_ITEM(MAX8998_REG_ONOFF4),
	288	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
	289	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
	290	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
	291	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
	292	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
	293	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
	294	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
	295	SAVE_ITEM(MAX8998_REG_LDO4),
	296	SAVE_ITEM(MAX8998_REG_LDO5),
	297	SAVE_ITEM(MAX8998_REG_LDO6),
	298	SAVE_ITEM(MAX8998_REG_LDO7),
	299	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
	300	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
	301	SAVE_ITEM(MAX8998_REG_LDO12),
	302	SAVE_ITEM(MAX8998_REG_LDO13),
	303	SAVE_ITEM(MAX8998_REG_LDO14),
	304	SAVE_ITEM(MAX8998_REG_LDO15),
	305	SAVE_ITEM(MAX8998_REG_LDO16),
	306	SAVE_ITEM(MAX8998_REG_LDO17),
	307	SAVE_ITEM(MAX8998_REG_BKCHR),
	308	SAVE_ITEM(MAX8998_REG_LBCNFG1),
	309	SAVE_ITEM(MAX8998_REG_LBCNFG2),
	310	};
	311	/* Save registers before hibernation */
	312	static int max8998_freeze(struct device *dev)
	313	{
1b5420e1	314	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	315	int i;
	316
	317	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	318	max8998_read_reg(i2c, max8998_dump[i].addr,
	319	&max8998_dump[i].val);
	320
	321	return 0;
	322	}
	323
	324	/* Restore registers after hibernation */
	325	static int max8998_restore(struct device *dev)
	326	{
1b5420e1	327	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	328	int i;
	329
	330	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	331	max8998_write_reg(i2c, max8998_dump[i].addr,
	332	max8998_dump[i].val);
	333
	334	return 0;
	335	}
	336
44be0a40	337	static const struct dev_pm_ops max8998_pm = {
cdd137c9 MH	338	.suspend = max8998_suspend,
	339	.resume = max8998_resume,
	340	.freeze = max8998_freeze,
	341	.restore = max8998_restore,
	342	};
	343
156f2528 KP	344	static struct i2c_driver max8998_i2c_driver = {
	345	.driver = {
	346	.name = "max8998",
cdd137c9	347	.pm = &max8998_pm,
b9e38338	348	.suppress_bind_attrs = true,
ee999fb3	349	.of_match_table = of_match_ptr(max8998_dt_match),
156f2528 KP	350	},
156f2528 KP	351	.probe = max8998_i2c_probe,
156f2528 KP	352	.id_table = max8998_i2c_id,
	353	};
	354
	355	static int __init max8998_i2c_init(void)
	356	{
	357	return i2c_add_driver(&max8998_i2c_driver);
	358	}
	359	/* init early so consumer devices can complete system boot */
	360	subsys_initcall(max8998_i2c_init);