[mirror_ubuntu-zesty-kernel.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/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 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 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
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/init.h>
	25	#include <linux/slab.h>
	26	#include <linux/i2c.h>
cdd137c9	27	#include <linux/interrupt.h>
ee999fb3 TF	28	#include <linux/of.h>
ee999fb3 TF	29	#include <linux/of_irq.h>
cdd137c9	30	#include <linux/pm_runtime.h>
156f2528 KP	31	#include <linux/mutex.h>
	32	#include <linux/mfd/core.h>
	33	#include <linux/mfd/max8998.h>
	34	#include <linux/mfd/max8998-private.h>
	35
9b16c0a4 JS	36	#define RTC_I2C_ADDR (0x0c >> 1)
9b16c0a4 JS	37
7c0517b1	38	static const struct mfd_cell max8998_devs[] = {
156f2528 KP	39	{
156f2528 KP	40	.name = "max8998-pmic",
9b16c0a4 JS	41	}, {
9b16c0a4 JS	42	.name = "max8998-rtc",
bb4ce970 DK	43	}, {
bb4ce970 DK	44	.name = "max8998-battery",
9b16c0a4	45	},
156f2528 KP	46	};
156f2528 KP	47
7c0517b1	48	static const struct mfd_cell lp3974_devs[] = {
337ce5d1 MH	49	{
	50	.name = "lp3974-pmic",
	51	}, {
	52	.name = "lp3974-rtc",
	53	},
	54	};
	55
676e02d7	56	int max8998_read_reg(struct i2c_client i2c, u8 reg, u8 dest)
156f2528	57	{
676e02d7	58	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	59	int ret;
	60
	61	mutex_lock(&max8998->iolock);
676e02d7	62	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	63	mutex_unlock(&max8998->iolock);
	64	if (ret < 0)
	65	return ret;
	66
	67	ret &= 0xff;
	68	*dest = ret;
	69	return 0;
	70	}
676e02d7	71	EXPORT_SYMBOL(max8998_read_reg);
156f2528	72
2c7e6f57 JS	73	int max8998_bulk_read(struct i2c_client i2c, u8 reg, int count, u8 buf)
	74	{
	75	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	76	int ret;
	77
	78	mutex_lock(&max8998->iolock);
	79	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	80	mutex_unlock(&max8998->iolock);
	81	if (ret < 0)
	82	return ret;
	83
	84	return 0;
	85	}
	86	EXPORT_SYMBOL(max8998_bulk_read);
	87
676e02d7	88	int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
156f2528	89	{
676e02d7	90	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	91	int ret;
	92
	93	mutex_lock(&max8998->iolock);
676e02d7	94	ret = i2c_smbus_write_byte_data(i2c, reg, value);
156f2528 KP	95	mutex_unlock(&max8998->iolock);
	96	return ret;
	97	}
676e02d7	98	EXPORT_SYMBOL(max8998_write_reg);
156f2528	99
9b16c0a4 JS	100	int max8998_bulk_write(struct i2c_client i2c, u8 reg, int count, u8 buf)
	101	{
	102	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
	103	int ret;
	104
	105	mutex_lock(&max8998->iolock);
	106	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	107	mutex_unlock(&max8998->iolock);
	108	if (ret < 0)
	109	return ret;
	110
	111	return 0;
	112	}
	113	EXPORT_SYMBOL(max8998_bulk_write);
	114
676e02d7	115	int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
156f2528	116	{
676e02d7	117	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
156f2528 KP	118	int ret;
	119
	120	mutex_lock(&max8998->iolock);
676e02d7	121	ret = i2c_smbus_read_byte_data(i2c, reg);
156f2528 KP	122	if (ret >= 0) {
	123	u8 old_val = ret & 0xff;
	124	u8 new_val = (val & mask) \| (old_val & (~mask));
676e02d7	125	ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
156f2528 KP	126	}
	127	mutex_unlock(&max8998->iolock);
	128	return ret;
	129	}
676e02d7	130	EXPORT_SYMBOL(max8998_update_reg);
156f2528	131
ee999fb3	132	#ifdef CONFIG_OF
e920574d	133	static const struct of_device_id max8998_dt_match[] = {
ee999fb3 TF	134	{ .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
	135	{ .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
	136	{ .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
	137	{},
	138	};
ee999fb3 TF	139	#endif
	140
	141	/*
	142	* Only the common platform data elements for max8998 are parsed here from the
	143	* device tree. Other sub-modules of max8998 such as pmic, rtc and others have
	144	* to parse their own platform data elements from device tree.
	145	*
	146	* The max8998 platform data structure is instantiated here and the drivers for
	147	* the sub-modules need not instantiate another instance while parsing their
	148	* platform data.
	149	*/
	150	static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
	151	struct device *dev)
	152	{
	153	struct max8998_platform_data *pd;
	154
	155	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	156	if (!pd)
	157	return ERR_PTR(-ENOMEM);
	158
	159	pd->ono = irq_of_parse_and_map(dev->of_node, 1);
	160
	161	/*
	162	* ToDo: the 'wakeup' member in the platform data is more of a linux
	163	* specfic information. Hence, there is no binding for that yet and
	164	* not parsed here.
	165	*/
	166	return pd;
	167	}
	168
8bace2d5	169	static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
ee999fb3 TF	170	const struct i2c_device_id *id)
	171	{
	172	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
	173	const struct of_device_id *match;
	174	match = of_match_node(max8998_dt_match, i2c->dev.of_node);
8bace2d5	175	return (unsigned long)match->data;
ee999fb3 TF	176	}
ee999fb3 TF	177
8bace2d5	178	return id->driver_data;
ee999fb3 TF	179	}
ee999fb3 TF	180
156f2528 KP	181	static int max8998_i2c_probe(struct i2c_client *i2c,
	182	const struct i2c_device_id *id)
	183	{
334a41ce	184	struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
156f2528 KP	185	struct max8998_dev *max8998;
	186	int ret = 0;
	187
0010dd38 JH	188	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
0010dd38 JH	189	GFP_KERNEL);
8f1f151e	190	if (max8998 == NULL)
156f2528	191	return -ENOMEM;
156f2528	192
ee999fb3 TF	193	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
	194	pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
	195	if (IS_ERR(pdata)) {
	196	ret = PTR_ERR(pdata);
	197	goto err;
	198	}
	199	}
	200
156f2528 KP	201	i2c_set_clientdata(i2c, max8998);
156f2528 KP	202	max8998->dev = &i2c->dev;
676e02d7	203	max8998->i2c = i2c;
2c7e6f57	204	max8998->irq = i2c->irq;
ee999fb3 TF	205	max8998->type = max8998_i2c_get_driver_data(i2c, id);
ee999fb3 TF	206	max8998->pdata = pdata;
2c7e6f57 JS	207	if (pdata) {
	208	max8998->ono = pdata->ono;
	209	max8998->irq_base = pdata->irq_base;
cdd137c9	210	max8998->wakeup = pdata->wakeup;
2c7e6f57	211	}
156f2528 KP	212	mutex_init(&max8998->iolock);
156f2528 KP	213
9b16c0a4	214	max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
ed26f87b KK	215	if (!max8998->rtc) {
	216	dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
	217	return -ENODEV;
	218	}
9b16c0a4 JS	219	i2c_set_clientdata(max8998->rtc, max8998);
9b16c0a4 JS	220
2c7e6f57 JS	221	max8998_irq_init(max8998);
2c7e6f57 JS	222
cdd137c9 MH	223	pm_runtime_set_active(max8998->dev);
cdd137c9 MH	224
ee999fb3	225	switch (max8998->type) {
337ce5d1 MH	226	case TYPE_LP3974:
337ce5d1 MH	227	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	228	lp3974_devs, ARRAY_SIZE(lp3974_devs),
0848c94f MB	229	NULL, 0, NULL);
337ce5d1 MH	230	break;
	231	case TYPE_MAX8998:
	232	ret = mfd_add_devices(max8998->dev, -1,
0848c94f MB	233	max8998_devs, ARRAY_SIZE(max8998_devs),
0848c94f MB	234	NULL, 0, NULL);
337ce5d1 MH	235	break;
	236	default:
	237	ret = -EINVAL;
	238	}
	239
156f2528 KP	240	if (ret < 0)
	241	goto err;
	242
7ef73598 JC	243	device_init_wakeup(max8998->dev, max8998->wakeup);
7ef73598 JC	244
156f2528 KP	245	return ret;
	246
	247	err:
	248	mfd_remove_devices(max8998->dev);
7484552e AL	249	max8998_irq_exit(max8998);
7484552e AL	250	i2c_unregister_device(max8998->rtc);
156f2528 KP	251	return ret;
	252	}
	253
156f2528	254	static const struct i2c_device_id max8998_i2c_id[] = {
509bd476 LM	255	{ "max8998", TYPE_MAX8998 },
509bd476 LM	256	{ "lp3974", TYPE_LP3974},
f8539ddc	257	{ }
156f2528	258	};
156f2528	259
cdd137c9 MH	260	static int max8998_suspend(struct device *dev)
cdd137c9 MH	261	{
1b5420e1	262	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	263	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	264
7ef73598	265	if (device_may_wakeup(dev))
d5bb1221	266	irq_set_irq_wake(max8998->irq, 1);
cdd137c9 MH	267	return 0;
	268	}
	269
	270	static int max8998_resume(struct device *dev)
	271	{
1b5420e1	272	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	273	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
cdd137c9 MH	274
7ef73598	275	if (device_may_wakeup(dev))
d5bb1221	276	irq_set_irq_wake(max8998->irq, 0);
cdd137c9 MH	277	/*
	278	* In LP3974, if IRQ registers are not "read & clear"
	279	* when it's set during sleep, the interrupt becomes
	280	* disabled.
	281	*/
	282	return max8998_irq_resume(i2c_get_clientdata(i2c));
	283	}
	284
	285	struct max8998_reg_dump {
	286	u8 addr;
	287	u8 val;
	288	};
	289	#define SAVE_ITEM(x) { .addr = (x), .val = 0x0, }
44be0a40	290	static struct max8998_reg_dump max8998_dump[] = {
cdd137c9 MH	291	SAVE_ITEM(MAX8998_REG_IRQM1),
	292	SAVE_ITEM(MAX8998_REG_IRQM2),
	293	SAVE_ITEM(MAX8998_REG_IRQM3),
	294	SAVE_ITEM(MAX8998_REG_IRQM4),
	295	SAVE_ITEM(MAX8998_REG_STATUSM1),
	296	SAVE_ITEM(MAX8998_REG_STATUSM2),
	297	SAVE_ITEM(MAX8998_REG_CHGR1),
	298	SAVE_ITEM(MAX8998_REG_CHGR2),
	299	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	300	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
	301	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
	302	SAVE_ITEM(MAX8998_REG_ONOFF1),
	303	SAVE_ITEM(MAX8998_REG_ONOFF2),
	304	SAVE_ITEM(MAX8998_REG_ONOFF3),
	305	SAVE_ITEM(MAX8998_REG_ONOFF4),
	306	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
	307	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
	308	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
	309	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
	310	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
	311	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
	312	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
	313	SAVE_ITEM(MAX8998_REG_LDO4),
	314	SAVE_ITEM(MAX8998_REG_LDO5),
	315	SAVE_ITEM(MAX8998_REG_LDO6),
	316	SAVE_ITEM(MAX8998_REG_LDO7),
	317	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
	318	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
	319	SAVE_ITEM(MAX8998_REG_LDO12),
	320	SAVE_ITEM(MAX8998_REG_LDO13),
	321	SAVE_ITEM(MAX8998_REG_LDO14),
	322	SAVE_ITEM(MAX8998_REG_LDO15),
	323	SAVE_ITEM(MAX8998_REG_LDO16),
	324	SAVE_ITEM(MAX8998_REG_LDO17),
	325	SAVE_ITEM(MAX8998_REG_BKCHR),
	326	SAVE_ITEM(MAX8998_REG_LBCNFG1),
	327	SAVE_ITEM(MAX8998_REG_LBCNFG2),
	328	};
	329	/* Save registers before hibernation */
	330	static int max8998_freeze(struct device *dev)
	331	{
1b5420e1	332	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	333	int i;
	334
	335	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	336	max8998_read_reg(i2c, max8998_dump[i].addr,
	337	&max8998_dump[i].val);
	338
	339	return 0;
	340	}
	341
	342	/* Restore registers after hibernation */
	343	static int max8998_restore(struct device *dev)
	344	{
1b5420e1	345	struct i2c_client *i2c = to_i2c_client(dev);
cdd137c9 MH	346	int i;
	347
	348	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
	349	max8998_write_reg(i2c, max8998_dump[i].addr,
	350	max8998_dump[i].val);
	351
	352	return 0;
	353	}
	354
44be0a40	355	static const struct dev_pm_ops max8998_pm = {
cdd137c9 MH	356	.suspend = max8998_suspend,
	357	.resume = max8998_resume,
	358	.freeze = max8998_freeze,
	359	.restore = max8998_restore,
	360	};
	361
156f2528 KP	362	static struct i2c_driver max8998_i2c_driver = {
	363	.driver = {
	364	.name = "max8998",
cdd137c9	365	.pm = &max8998_pm,
b9e38338	366	.suppress_bind_attrs = true,
ee999fb3	367	.of_match_table = of_match_ptr(max8998_dt_match),
156f2528 KP	368	},
156f2528 KP	369	.probe = max8998_i2c_probe,
156f2528 KP	370	.id_table = max8998_i2c_id,
	371	};
	372
	373	static int __init max8998_i2c_init(void)
	374	{
	375	return i2c_add_driver(&max8998_i2c_driver);
	376	}
	377	/* init early so consumer devices can complete system boot */
	378	subsys_initcall(max8998_i2c_init);