[deliverable/linux.git] / drivers / mfd / max77686.c

/*
 * max77686.c - mfd core driver for the Maxim 77686/802
 *
 * Copyright (C) 2012 Samsung Electronics
 * Chiwoong Byun <woong.byun@smasung.com>
 * Jonghwa Lee <jonghwa3.lee@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
 *
 * This driver is based on max8997.c
 */

#include <linux/export.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#include <linux/err.h>
#include <linux/of.h>

static const struct mfd_cell max77686_devs[] = {
	{ .name = "max77686-pmic", },
	{ .name = "max77686-rtc", },
	{ .name = "max77686-clk", },
};

static const struct mfd_cell max77802_devs[] = {
	{ .name = "max77802-pmic", },
	{ .name = "max77802-clk", },
	{ .name = "max77802-rtc", },
};

static bool max77802_pmic_is_accessible_reg(struct device *dev,
					    unsigned int reg)
{
	return reg < MAX77802_REG_PMIC_END;
}

static bool max77802_rtc_is_accessible_reg(struct device *dev,
					   unsigned int reg)
{
	return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END);
}

static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg)
{
	return (max77802_pmic_is_accessible_reg(dev, reg) ||
		max77802_rtc_is_accessible_reg(dev, reg));
}

static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg)
{
	return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 ||
		reg == MAX77802_REG_INT2);
}

static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg)
{
	return (reg == MAX77802_RTC_INT ||
		reg == MAX77802_RTC_UPDATE0 ||
		reg == MAX77802_RTC_UPDATE1);
}

static bool max77802_is_precious_reg(struct device *dev, unsigned int reg)
{
	return (max77802_pmic_is_precious_reg(dev, reg) ||
		max77802_rtc_is_precious_reg(dev, reg));
}

static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg)
{
	return (max77802_is_precious_reg(dev, reg) ||
		reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 ||
		reg == MAX77802_REG_PWRON);
}

static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
{
	return (max77802_rtc_is_precious_reg(dev, reg) ||
		reg == MAX77802_RTC_SEC ||
		reg == MAX77802_RTC_MIN ||
		reg == MAX77802_RTC_HOUR ||
		reg == MAX77802_RTC_WEEKDAY ||
		reg == MAX77802_RTC_MONTH ||
		reg == MAX77802_RTC_YEAR ||
		reg == MAX77802_RTC_DATE);
}

static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg)
{
	return (max77802_pmic_is_volatile_reg(dev, reg) ||
		max77802_rtc_is_volatile_reg(dev, reg));
}

static const struct regmap_config max77686_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static const struct regmap_config max77802_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.writeable_reg = max77802_is_accessible_reg,
	.readable_reg = max77802_is_accessible_reg,
	.precious_reg = max77802_is_precious_reg,
	.volatile_reg = max77802_is_volatile_reg,
	.name = "max77802-pmic",
	.cache_type = REGCACHE_RBTREE,
};

static const struct regmap_irq max77686_irqs[] = {
	/* INT1 interrupts */
	{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, },
	/* INT2 interrupts */
	{ .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, },
	{ .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, },
};

static const struct regmap_irq_chip max77686_irq_chip = {
	.name			= "max77686-pmic",
	.status_base		= MAX77686_REG_INT1,
	.mask_base		= MAX77686_REG_INT1MSK,
	.num_regs		= 2,
	.irqs			= max77686_irqs,
	.num_irqs		= ARRAY_SIZE(max77686_irqs),
};

static const struct regmap_irq_chip max77802_irq_chip = {
	.name			= "max77802-pmic",
	.status_base		= MAX77802_REG_INT1,
	.mask_base		= MAX77802_REG_INT1MSK,
	.num_regs		= 2,
	.irqs			= max77686_irqs, /* same masks as 77686 */
	.num_irqs		= ARRAY_SIZE(max77686_irqs),
};

static const struct of_device_id max77686_pmic_dt_match[] = {
	{
		.compatible = "maxim,max77686",
		.data = (void *)TYPE_MAX77686,
	},
	{
		.compatible = "maxim,max77802",
		.data = (void *)TYPE_MAX77802,
	},
	{ },
};

static int max77686_i2c_probe(struct i2c_client *i2c,
			      const struct i2c_device_id *id)
{
	struct max77686_dev *max77686 = NULL;
	const struct of_device_id *match;
	unsigned int data;
	int ret = 0;
	const struct regmap_config *config;
	const struct regmap_irq_chip *irq_chip;
	const struct mfd_cell *cells;
	int n_devs;

	max77686 = devm_kzalloc(&i2c->dev,
				sizeof(struct max77686_dev), GFP_KERNEL);
	if (!max77686)
		return -ENOMEM;

	if (i2c->dev.of_node) {
		match = of_match_node(max77686_pmic_dt_match, i2c->dev.of_node);
		if (!match)
			return -EINVAL;

		max77686->type = (unsigned long)match->data;
	} else
		max77686->type = id->driver_data;

	i2c_set_clientdata(i2c, max77686);
	max77686->dev = &i2c->dev;
	max77686->i2c = i2c;

	max77686->irq = i2c->irq;

	if (max77686->type == TYPE_MAX77686) {
		config = &max77686_regmap_config;
		irq_chip = &max77686_irq_chip;
		cells =  max77686_devs;
		n_devs = ARRAY_SIZE(max77686_devs);
	} else {
		config = &max77802_regmap_config;
		irq_chip = &max77802_irq_chip;
		cells =  max77802_devs;
		n_devs = ARRAY_SIZE(max77802_devs);
	}

	max77686->regmap = devm_regmap_init_i2c(i2c, config);
	if (IS_ERR(max77686->regmap)) {
		ret = PTR_ERR(max77686->regmap);
		dev_err(max77686->dev, "Failed to allocate register map: %d\n",
				ret);
		return ret;
	}

	ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
	if (ret < 0) {
		dev_err(max77686->dev,
			"device not found on this channel (this is not an error)\n");
		return -ENODEV;
	}

	ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
				  IRQF_SHARED, 0, irq_chip,
				  &max77686->irq_data);
	if (ret < 0) {
		dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
		return ret;
	}

	ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL);
	if (ret < 0) {
		dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
		goto err_del_irqc;
	}

	return 0;

err_del_irqc:
	regmap_del_irq_chip(max77686->irq, max77686->irq_data);

	return ret;
}

static int max77686_i2c_remove(struct i2c_client *i2c)
{
	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);

	mfd_remove_devices(max77686->dev);

	regmap_del_irq_chip(max77686->irq, max77686->irq_data);

	return 0;
}

static const struct i2c_device_id max77686_i2c_id[] = {
	{ "max77686", TYPE_MAX77686 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);

#ifdef CONFIG_PM_SLEEP
static int max77686_suspend(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		enable_irq_wake(max77686->irq);

	/*
	 * IRQ must be disabled during suspend because if it happens
	 * while suspended it will be handled before resuming I2C.
	 *
	 * When device is woken up from suspend (e.g. by RTC wake alarm),
	 * an interrupt occurs before resuming I2C bus controller.
	 * Interrupt handler tries to read registers but this read
	 * will fail because I2C is still suspended.
	 */
	disable_irq(max77686->irq);

	return 0;
}

static int max77686_resume(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		disable_irq_wake(max77686->irq);

	enable_irq(max77686->irq);

	return 0;
}
#endif /* CONFIG_PM_SLEEP */

static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);

static struct i2c_driver max77686_i2c_driver = {
	.driver = {
		   .name = "max77686",
		   .pm = &max77686_pm,
		   .of_match_table = of_match_ptr(max77686_pmic_dt_match),
	},
	.probe = max77686_i2c_probe,
	.remove = max77686_i2c_remove,
	.id_table = max77686_i2c_id,
};

static int __init max77686_i2c_init(void)
{
	return i2c_add_driver(&max77686_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max77686_i2c_init);

static void __exit max77686_i2c_exit(void)
{
	i2c_del_driver(&max77686_i2c_driver);
}
module_exit(max77686_i2c_exit);

MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver");
MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
dae8a969	1	/*
a259f389	2	* max77686.c - mfd core driver for the Maxim 77686/802
dae8a969 JL	3	*
	4	* Copyright (C) 2012 Samsung Electronics
	5	* Chiwoong Byun <woong.byun@smasung.com>
	6	* Jonghwa Lee <jonghwa3.lee@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	* This driver is based on max8997.c
	23	*/
	24
	25	#include <linux/export.h>
	26	#include <linux/slab.h>
	27	#include <linux/i2c.h>
6f1c1e71 JMC	28	#include <linux/irq.h>
6f1c1e71 JMC	29	#include <linux/interrupt.h>
dae8a969 JL	30	#include <linux/pm_runtime.h>
dae8a969 JL	31	#include <linux/module.h>
dae8a969 JL	32	#include <linux/mfd/core.h>
	33	#include <linux/mfd/max77686.h>
	34	#include <linux/mfd/max77686-private.h>
	35	#include <linux/err.h>
2a048d3b	36	#include <linux/of.h>
dae8a969	37
7c0517b1	38	static const struct mfd_cell max77686_devs[] = {
dae8a969 JL	39	{ .name = "max77686-pmic", },
dae8a969 JL	40	{ .name = "max77686-rtc", },
c0fa7e10	41	{ .name = "max77686-clk", },
dae8a969 JL	42	};
dae8a969 JL	43
a259f389 JMC	44	static const struct mfd_cell max77802_devs[] = {
	45	{ .name = "max77802-pmic", },
	46	{ .name = "max77802-clk", },
	47	{ .name = "max77802-rtc", },
	48	};
	49
	50	static bool max77802_pmic_is_accessible_reg(struct device *dev,
	51	unsigned int reg)
	52	{
b87d9a0f	53	return reg < MAX77802_REG_PMIC_END;
a259f389 JMC	54	}
	55
	56	static bool max77802_rtc_is_accessible_reg(struct device *dev,
	57	unsigned int reg)
	58	{
	59	return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END);
	60	}
	61
	62	static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg)
	63	{
	64	return (max77802_pmic_is_accessible_reg(dev, reg) \|\|
	65	max77802_rtc_is_accessible_reg(dev, reg));
	66	}
	67
	68	static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg)
	69	{
	70	return (reg == MAX77802_REG_INTSRC \|\| reg == MAX77802_REG_INT1 \|\|
	71	reg == MAX77802_REG_INT2);
	72	}
	73
	74	static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg)
	75	{
	76	return (reg == MAX77802_RTC_INT \|\|
	77	reg == MAX77802_RTC_UPDATE0 \|\|
	78	reg == MAX77802_RTC_UPDATE1);
	79	}
	80
	81	static bool max77802_is_precious_reg(struct device *dev, unsigned int reg)
	82	{
	83	return (max77802_pmic_is_precious_reg(dev, reg) \|\|
	84	max77802_rtc_is_precious_reg(dev, reg));
	85	}
	86
	87	static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg)
	88	{
	89	return (max77802_is_precious_reg(dev, reg) \|\|
	90	reg == MAX77802_REG_STATUS1 \|\| reg == MAX77802_REG_STATUS2 \|\|
	91	reg == MAX77802_REG_PWRON);
	92	}
	93
	94	static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
	95	{
	96	return (max77802_rtc_is_precious_reg(dev, reg) \|\|
	97	reg == MAX77802_RTC_SEC \|\|
	98	reg == MAX77802_RTC_MIN \|\|
	99	reg == MAX77802_RTC_HOUR \|\|
	100	reg == MAX77802_RTC_WEEKDAY \|\|
	101	reg == MAX77802_RTC_MONTH \|\|
	102	reg == MAX77802_RTC_YEAR \|\|
	103	reg == MAX77802_RTC_DATE);
	104	}
	105
	106	static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg)
	107	{
	108	return (max77802_pmic_is_volatile_reg(dev, reg) \|\|
	109	max77802_rtc_is_volatile_reg(dev, reg));
	110	}
	111
68be231c	112	static const struct regmap_config max77686_regmap_config = {
dae8a969 JL	113	.reg_bits = 8,
	114	.val_bits = 8,
	115	};
	116
68be231c	117	static const struct regmap_config max77802_regmap_config = {
a259f389 JMC	118	.reg_bits = 8,
	119	.val_bits = 8,
	120	.writeable_reg = max77802_is_accessible_reg,
	121	.readable_reg = max77802_is_accessible_reg,
	122	.precious_reg = max77802_is_precious_reg,
	123	.volatile_reg = max77802_is_volatile_reg,
	124	.name = "max77802-pmic",
	125	.cache_type = REGCACHE_RBTREE,
	126	};
	127
6f1c1e71 JMC	128	static const struct regmap_irq max77686_irqs[] = {
	129	/* INT1 interrupts */
	130	{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
	131	{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, },
	132	{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, },
	133	{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, },
	134	{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, },
	135	{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, },
	136	{ .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, },
	137	{ .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, },
	138	/* INT2 interrupts */
	139	{ .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, },
	140	{ .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, },
	141	};
	142
	143	static const struct regmap_irq_chip max77686_irq_chip = {
	144	.name = "max77686-pmic",
	145	.status_base = MAX77686_REG_INT1,
	146	.mask_base = MAX77686_REG_INT1MSK,
	147	.num_regs = 2,
	148	.irqs = max77686_irqs,
	149	.num_irqs = ARRAY_SIZE(max77686_irqs),
	150	};
	151
a259f389 JMC	152	static const struct regmap_irq_chip max77802_irq_chip = {
	153	.name = "max77802-pmic",
	154	.status_base = MAX77802_REG_INT1,
	155	.mask_base = MAX77802_REG_INT1MSK,
	156	.num_regs = 2,
	157	.irqs = max77686_irqs, /* same masks as 77686 */
	158	.num_irqs = ARRAY_SIZE(max77686_irqs),
	159	};
	160
b68ece3d	161	static const struct of_device_id max77686_pmic_dt_match[] = {
a259f389 JMC	162	{
	163	.compatible = "maxim,max77686",
	164	.data = (void *)TYPE_MAX77686,
	165	},
	166	{
	167	.compatible = "maxim,max77802",
	168	.data = (void *)TYPE_MAX77802,
	169	},
	170	{ },
2984fc00 AL	171	};
2984fc00 AL	172
dae8a969 JL	173	static int max77686_i2c_probe(struct i2c_client *i2c,
	174	const struct i2c_device_id *id)
	175	{
c1516f84	176	struct max77686_dev *max77686 = NULL;
a259f389	177	const struct of_device_id *match;
dae8a969 JL	178	unsigned int data;
dae8a969 JL	179	int ret = 0;
a259f389 JMC	180	const struct regmap_config *config;
a259f389 JMC	181	const struct regmap_irq_chip *irq_chip;
a259f389 JMC	182	const struct mfd_cell *cells;
a259f389 JMC	183	int n_devs;
dae8a969	184
742413a4 LJ	185	max77686 = devm_kzalloc(&i2c->dev,
742413a4 LJ	186	sizeof(struct max77686_dev), GFP_KERNEL);
c0e0fcda	187	if (!max77686)
dae8a969 JL	188	return -ENOMEM;
dae8a969 JL	189
a259f389 JMC	190	if (i2c->dev.of_node) {
	191	match = of_match_node(max77686_pmic_dt_match, i2c->dev.of_node);
	192	if (!match)
	193	return -EINVAL;
	194
ec8bd566 LJ	195	max77686->type = (unsigned long)match->data;
ec8bd566 LJ	196	} else
a259f389	197	max77686->type = id->driver_data;
a259f389	198
dae8a969 JL	199	i2c_set_clientdata(i2c, max77686);
	200	max77686->dev = &i2c->dev;
	201	max77686->i2c = i2c;
dae8a969	202
2b40459b	203	max77686->irq = i2c->irq;
dae8a969	204
a259f389 JMC	205	if (max77686->type == TYPE_MAX77686) {
	206	config = &max77686_regmap_config;
	207	irq_chip = &max77686_irq_chip;
a259f389 JMC	208	cells = max77686_devs;
	209	n_devs = ARRAY_SIZE(max77686_devs);
	210	} else {
	211	config = &max77802_regmap_config;
	212	irq_chip = &max77802_irq_chip;
a259f389 JMC	213	cells = max77802_devs;
	214	n_devs = ARRAY_SIZE(max77802_devs);
	215	}
	216
	217	max77686->regmap = devm_regmap_init_i2c(i2c, config);
136d982e AL	218	if (IS_ERR(max77686->regmap)) {
	219	ret = PTR_ERR(max77686->regmap);
	220	dev_err(max77686->dev, "Failed to allocate register map: %d\n",
	221	ret);
136d982e AL	222	return ret;
	223	}
	224
c0e0fcda JMC	225	ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
c0e0fcda JMC	226	if (ret < 0) {
dae8a969 JL	227	dev_err(max77686->dev,
dae8a969 JL	228	"device not found on this channel (this is not an error)\n");
742413a4	229	return -ENODEV;
6f1c1e71	230	}
dae8a969	231
6f1c1e71 JMC	232	ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
6f1c1e71 JMC	233	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT \|
a259f389	234	IRQF_SHARED, 0, irq_chip,
6f1c1e71	235	&max77686->irq_data);
f3937549	236	if (ret < 0) {
6f1c1e71	237	dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
f3937549	238	return ret;
6f1c1e71	239	}
dae8a969	240
a259f389	241	ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL);
742413a4	242	if (ret < 0) {
6f1c1e71	243	dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
f3937549	244	goto err_del_irqc;
742413a4	245	}
dae8a969	246
6f1c1e71 JMC	247	return 0;
6f1c1e71 JMC	248
6f1c1e71 JMC	249	err_del_irqc:
6f1c1e71 JMC	250	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
6f1c1e71	251
dae8a969 JL	252	return ret;
	253	}
	254
	255	static int max77686_i2c_remove(struct i2c_client *i2c)
	256	{
	257	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
	258
	259	mfd_remove_devices(max77686->dev);
6f1c1e71	260
6f1c1e71 JMC	261	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
6f1c1e71 JMC	262
dae8a969 JL	263	return 0;
	264	}
	265
	266	static const struct i2c_device_id max77686_i2c_id[] = {
	267	{ "max77686", TYPE_MAX77686 },
	268	{ }
	269	};
	270	MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
	271
2b52b5d5 JMC	272	#ifdef CONFIG_PM_SLEEP
	273	static int max77686_suspend(struct device *dev)
	274	{
1b5420e1	275	struct i2c_client *i2c = to_i2c_client(dev);
2b52b5d5 JMC	276	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
	277
	278	if (device_may_wakeup(dev))
	279	enable_irq_wake(max77686->irq);
	280
	281	/*
	282	* IRQ must be disabled during suspend because if it happens
	283	* while suspended it will be handled before resuming I2C.
	284	*
	285	* When device is woken up from suspend (e.g. by RTC wake alarm),
	286	* an interrupt occurs before resuming I2C bus controller.
	287	* Interrupt handler tries to read registers but this read
	288	* will fail because I2C is still suspended.
	289	*/
	290	disable_irq(max77686->irq);
	291
	292	return 0;
	293	}
	294
	295	static int max77686_resume(struct device *dev)
	296	{
1b5420e1	297	struct i2c_client *i2c = to_i2c_client(dev);
2b52b5d5 JMC	298	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
	299
	300	if (device_may_wakeup(dev))
	301	disable_irq_wake(max77686->irq);
	302
	303	enable_irq(max77686->irq);
	304
	305	return 0;
	306	}
	307	#endif /* CONFIG_PM_SLEEP */
	308
	309	static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);
	310
dae8a969 JL	311	static struct i2c_driver max77686_i2c_driver = {
	312	.driver = {
	313	.name = "max77686",
2b52b5d5	314	.pm = &max77686_pm,
c1516f84	315	.of_match_table = of_match_ptr(max77686_pmic_dt_match),
dae8a969 JL	316	},
	317	.probe = max77686_i2c_probe,
	318	.remove = max77686_i2c_remove,
	319	.id_table = max77686_i2c_id,
	320	};
	321
	322	static int __init max77686_i2c_init(void)
	323	{
	324	return i2c_add_driver(&max77686_i2c_driver);
	325	}
	326	/* init early so consumer devices can complete system boot */
	327	subsys_initcall(max77686_i2c_init);
	328
	329	static void __exit max77686_i2c_exit(void)
	330	{
	331	i2c_del_driver(&max77686_i2c_driver);
	332	}
	333	module_exit(max77686_i2c_exit);
	334
a259f389	335	MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver");
dae8a969 JL	336	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
dae8a969 JL	337	MODULE_LICENSE("GPL");