[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>

#define I2C_ADDR_RTC	(0x0C >> 1)

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 max77686_rtc_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 max77686_rtc_irqs[] = {
	/* RTC interrupts */
	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTC60S_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA1_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA2_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_RTCINT_SMPL_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTC1S_MSK, },
	{ .reg_offset = 0, .mask = MAX77686_RTCINT_WTSR_MSK, },
};

static const struct regmap_irq_chip max77686_rtc_irq_chip = {
	.name			= "max77686-rtc",
	.status_base		= MAX77686_RTC_INT,
	.mask_base		= MAX77686_RTC_INTM,
	.num_regs		= 1,
	.irqs			= max77686_rtc_irqs,
	.num_irqs		= ARRAY_SIZE(max77686_rtc_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 regmap_irq_chip max77802_rtc_irq_chip = {
	.name			= "max77802-rtc",
	.status_base		= MAX77802_RTC_INT,
	.mask_base		= MAX77802_RTC_INTM,
	.num_regs		= 1,
	.irqs			= max77686_rtc_irqs, /* same masks as 77686 */
	.num_irqs		= ARRAY_SIZE(max77686_rtc_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 regmap_irq_chip *rtc_irq_chip;
	struct regmap **rtc_regmap;
	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;
		rtc_irq_chip = &max77686_rtc_irq_chip;
		rtc_regmap = &max77686->rtc_regmap;
		cells =  max77686_devs;
		n_devs = ARRAY_SIZE(max77686_devs);
	} else {
		config = &max77802_regmap_config;
		irq_chip = &max77802_irq_chip;
		rtc_irq_chip = &max77802_rtc_irq_chip;
		rtc_regmap = &max77686->regmap;
		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;
	}

	if (max77686->type == TYPE_MAX77686) {
		max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
		if (!max77686->rtc) {
			dev_err(max77686->dev,
				"Failed to allocate I2C device for RTC\n");
			return -ENODEV;
		}
		i2c_set_clientdata(max77686->rtc, max77686);

		max77686->rtc_regmap =
			devm_regmap_init_i2c(max77686->rtc,
					     &max77686_rtc_regmap_config);
		if (IS_ERR(max77686->rtc_regmap)) {
			ret = PTR_ERR(max77686->rtc_regmap);
			dev_err(max77686->dev,
				"failed to allocate RTC regmap: %d\n",
				ret);
			goto err_unregister_i2c;
		}
	}

	ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
				  IRQF_SHARED, 0, irq_chip,
				  &max77686->irq_data);
	if (ret) {
		dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
		goto err_unregister_i2c;
	}

	ret = regmap_add_irq_chip(*rtc_regmap, max77686->irq,
				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
				  IRQF_SHARED, 0, rtc_irq_chip,
				  &max77686->rtc_irq_data);
	if (ret) {
		dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
		goto err_del_irqc;
	}

	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_rtc_irqc;
	}

	return 0;

err_del_rtc_irqc:
	regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
err_del_irqc:
	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
err_unregister_i2c:
	if (max77686->type == TYPE_MAX77686)
		i2c_unregister_device(max77686->rtc);

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

	if (max77686->type == TYPE_MAX77686)
		i2c_unregister_device(max77686->rtc);

	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 JL	37
	38	#define I2C_ADDR_RTC (0x0C >> 1)
	39
7c0517b1	40	static const struct mfd_cell max77686_devs[] = {
dae8a969 JL	41	{ .name = "max77686-pmic", },
dae8a969 JL	42	{ .name = "max77686-rtc", },
c0fa7e10	43	{ .name = "max77686-clk", },
dae8a969 JL	44	};
dae8a969 JL	45
a259f389 JMC	46	static const struct mfd_cell max77802_devs[] = {
	47	{ .name = "max77802-pmic", },
	48	{ .name = "max77802-clk", },
	49	{ .name = "max77802-rtc", },
	50	};
	51
	52	static bool max77802_pmic_is_accessible_reg(struct device *dev,
	53	unsigned int reg)
	54	{
b87d9a0f	55	return reg < MAX77802_REG_PMIC_END;
a259f389 JMC	56	}
	57
	58	static bool max77802_rtc_is_accessible_reg(struct device *dev,
	59	unsigned int reg)
	60	{
	61	return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END);
	62	}
	63
	64	static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg)
	65	{
	66	return (max77802_pmic_is_accessible_reg(dev, reg) \|\|
	67	max77802_rtc_is_accessible_reg(dev, reg));
	68	}
	69
	70	static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg)
	71	{
	72	return (reg == MAX77802_REG_INTSRC \|\| reg == MAX77802_REG_INT1 \|\|
	73	reg == MAX77802_REG_INT2);
	74	}
	75
	76	static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg)
	77	{
	78	return (reg == MAX77802_RTC_INT \|\|
	79	reg == MAX77802_RTC_UPDATE0 \|\|
	80	reg == MAX77802_RTC_UPDATE1);
	81	}
	82
	83	static bool max77802_is_precious_reg(struct device *dev, unsigned int reg)
	84	{
	85	return (max77802_pmic_is_precious_reg(dev, reg) \|\|
	86	max77802_rtc_is_precious_reg(dev, reg));
	87	}
	88
	89	static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg)
	90	{
	91	return (max77802_is_precious_reg(dev, reg) \|\|
	92	reg == MAX77802_REG_STATUS1 \|\| reg == MAX77802_REG_STATUS2 \|\|
	93	reg == MAX77802_REG_PWRON);
	94	}
	95
	96	static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
	97	{
	98	return (max77802_rtc_is_precious_reg(dev, reg) \|\|
	99	reg == MAX77802_RTC_SEC \|\|
	100	reg == MAX77802_RTC_MIN \|\|
	101	reg == MAX77802_RTC_HOUR \|\|
	102	reg == MAX77802_RTC_WEEKDAY \|\|
	103	reg == MAX77802_RTC_MONTH \|\|
	104	reg == MAX77802_RTC_YEAR \|\|
	105	reg == MAX77802_RTC_DATE);
	106	}
	107
	108	static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg)
	109	{
	110	return (max77802_pmic_is_volatile_reg(dev, reg) \|\|
	111	max77802_rtc_is_volatile_reg(dev, reg));
	112	}
	113
68be231c	114	static const struct regmap_config max77686_regmap_config = {
dae8a969 JL	115	.reg_bits = 8,
	116	.val_bits = 8,
	117	};
	118
68be231c	119	static const struct regmap_config max77686_rtc_regmap_config = {
6f1c1e71 JMC	120	.reg_bits = 8,
	121	.val_bits = 8,
	122	};
	123
68be231c	124	static const struct regmap_config max77802_regmap_config = {
a259f389 JMC	125	.reg_bits = 8,
	126	.val_bits = 8,
	127	.writeable_reg = max77802_is_accessible_reg,
	128	.readable_reg = max77802_is_accessible_reg,
	129	.precious_reg = max77802_is_precious_reg,
	130	.volatile_reg = max77802_is_volatile_reg,
	131	.name = "max77802-pmic",
	132	.cache_type = REGCACHE_RBTREE,
	133	};
	134
6f1c1e71 JMC	135	static const struct regmap_irq max77686_irqs[] = {
	136	/* INT1 interrupts */
	137	{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONF_MSK, },
	138	{ .reg_offset = 0, .mask = MAX77686_INT1_PWRONR_MSK, },
	139	{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBF_MSK, },
	140	{ .reg_offset = 0, .mask = MAX77686_INT1_JIGONBR_MSK, },
	141	{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBF_MSK, },
	142	{ .reg_offset = 0, .mask = MAX77686_INT1_ACOKBR_MSK, },
	143	{ .reg_offset = 0, .mask = MAX77686_INT1_ONKEY1S_MSK, },
	144	{ .reg_offset = 0, .mask = MAX77686_INT1_MRSTB_MSK, },
	145	/* INT2 interrupts */
	146	{ .reg_offset = 1, .mask = MAX77686_INT2_140C_MSK, },
	147	{ .reg_offset = 1, .mask = MAX77686_INT2_120C_MSK, },
	148	};
	149
	150	static const struct regmap_irq_chip max77686_irq_chip = {
	151	.name = "max77686-pmic",
	152	.status_base = MAX77686_REG_INT1,
	153	.mask_base = MAX77686_REG_INT1MSK,
	154	.num_regs = 2,
	155	.irqs = max77686_irqs,
	156	.num_irqs = ARRAY_SIZE(max77686_irqs),
	157	};
	158
	159	static const struct regmap_irq max77686_rtc_irqs[] = {
	160	/* RTC interrupts */
	161	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTC60S_MSK, },
	162	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA1_MSK, },
	163	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA2_MSK, },
	164	{ .reg_offset = 0, .mask = MAX77686_RTCINT_SMPL_MSK, },
	165	{ .reg_offset = 0, .mask = MAX77686_RTCINT_RTC1S_MSK, },
	166	{ .reg_offset = 0, .mask = MAX77686_RTCINT_WTSR_MSK, },
	167	};
	168
	169	static const struct regmap_irq_chip max77686_rtc_irq_chip = {
	170	.name = "max77686-rtc",
	171	.status_base = MAX77686_RTC_INT,
	172	.mask_base = MAX77686_RTC_INTM,
	173	.num_regs = 1,
	174	.irqs = max77686_rtc_irqs,
	175	.num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
	176	};
	177
a259f389 JMC	178	static const struct regmap_irq_chip max77802_irq_chip = {
	179	.name = "max77802-pmic",
	180	.status_base = MAX77802_REG_INT1,
	181	.mask_base = MAX77802_REG_INT1MSK,
	182	.num_regs = 2,
	183	.irqs = max77686_irqs, /* same masks as 77686 */
	184	.num_irqs = ARRAY_SIZE(max77686_irqs),
	185	};
	186
	187	static const struct regmap_irq_chip max77802_rtc_irq_chip = {
	188	.name = "max77802-rtc",
	189	.status_base = MAX77802_RTC_INT,
	190	.mask_base = MAX77802_RTC_INTM,
	191	.num_regs = 1,
	192	.irqs = max77686_rtc_irqs, /* same masks as 77686 */
	193	.num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
	194	};
	195
b68ece3d	196	static const struct of_device_id max77686_pmic_dt_match[] = {
a259f389 JMC	197	{
	198	.compatible = "maxim,max77686",
	199	.data = (void *)TYPE_MAX77686,
	200	},
	201	{
	202	.compatible = "maxim,max77802",
	203	.data = (void *)TYPE_MAX77802,
	204	},
	205	{ },
2984fc00 AL	206	};
2984fc00 AL	207
dae8a969 JL	208	static int max77686_i2c_probe(struct i2c_client *i2c,
	209	const struct i2c_device_id *id)
	210	{
c1516f84	211	struct max77686_dev *max77686 = NULL;
a259f389	212	const struct of_device_id *match;
dae8a969 JL	213	unsigned int data;
dae8a969 JL	214	int ret = 0;
a259f389 JMC	215	const struct regmap_config *config;
	216	const struct regmap_irq_chip *irq_chip;
	217	const struct regmap_irq_chip *rtc_irq_chip;
	218	struct regmap **rtc_regmap;
	219	const struct mfd_cell *cells;
	220	int n_devs;
dae8a969	221
742413a4 LJ	222	max77686 = devm_kzalloc(&i2c->dev,
742413a4 LJ	223	sizeof(struct max77686_dev), GFP_KERNEL);
c0e0fcda	224	if (!max77686)
dae8a969 JL	225	return -ENOMEM;
dae8a969 JL	226
a259f389 JMC	227	if (i2c->dev.of_node) {
	228	match = of_match_node(max77686_pmic_dt_match, i2c->dev.of_node);
	229	if (!match)
	230	return -EINVAL;
	231
ec8bd566 LJ	232	max77686->type = (unsigned long)match->data;
ec8bd566 LJ	233	} else
a259f389	234	max77686->type = id->driver_data;
a259f389	235
dae8a969 JL	236	i2c_set_clientdata(i2c, max77686);
	237	max77686->dev = &i2c->dev;
	238	max77686->i2c = i2c;
dae8a969	239
2b40459b	240	max77686->irq = i2c->irq;
dae8a969	241
a259f389 JMC	242	if (max77686->type == TYPE_MAX77686) {
	243	config = &max77686_regmap_config;
	244	irq_chip = &max77686_irq_chip;
	245	rtc_irq_chip = &max77686_rtc_irq_chip;
	246	rtc_regmap = &max77686->rtc_regmap;
	247	cells = max77686_devs;
	248	n_devs = ARRAY_SIZE(max77686_devs);
	249	} else {
	250	config = &max77802_regmap_config;
	251	irq_chip = &max77802_irq_chip;
	252	rtc_irq_chip = &max77802_rtc_irq_chip;
	253	rtc_regmap = &max77686->regmap;
	254	cells = max77802_devs;
	255	n_devs = ARRAY_SIZE(max77802_devs);
	256	}
	257
	258	max77686->regmap = devm_regmap_init_i2c(i2c, config);
136d982e AL	259	if (IS_ERR(max77686->regmap)) {
	260	ret = PTR_ERR(max77686->regmap);
	261	dev_err(max77686->dev, "Failed to allocate register map: %d\n",
	262	ret);
136d982e AL	263	return ret;
	264	}
	265
c0e0fcda JMC	266	ret = regmap_read(max77686->regmap, MAX77686_REG_DEVICE_ID, &data);
c0e0fcda JMC	267	if (ret < 0) {
dae8a969 JL	268	dev_err(max77686->dev,
dae8a969 JL	269	"device not found on this channel (this is not an error)\n");
742413a4	270	return -ENODEV;
6f1c1e71	271	}
dae8a969	272
a259f389 JMC	273	if (max77686->type == TYPE_MAX77686) {
	274	max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
	275	if (!max77686->rtc) {
	276	dev_err(max77686->dev,
	277	"Failed to allocate I2C device for RTC\n");
	278	return -ENODEV;
	279	}
	280	i2c_set_clientdata(max77686->rtc, max77686);
	281
	282	max77686->rtc_regmap =
	283	devm_regmap_init_i2c(max77686->rtc,
	284	&max77686_rtc_regmap_config);
	285	if (IS_ERR(max77686->rtc_regmap)) {
	286	ret = PTR_ERR(max77686->rtc_regmap);
	287	dev_err(max77686->dev,
	288	"failed to allocate RTC regmap: %d\n",
	289	ret);
	290	goto err_unregister_i2c;
	291	}
6f1c1e71 JMC	292	}
	293
	294	ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
	295	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT \|
a259f389	296	IRQF_SHARED, 0, irq_chip,
6f1c1e71	297	&max77686->irq_data);
c0e0fcda	298	if (ret) {
6f1c1e71 JMC	299	dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
	300	goto err_unregister_i2c;
	301	}
a259f389 JMC	302
a259f389 JMC	303	ret = regmap_add_irq_chip(*rtc_regmap, max77686->irq,
6f1c1e71	304	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT \|
a259f389	305	IRQF_SHARED, 0, rtc_irq_chip,
6f1c1e71	306	&max77686->rtc_irq_data);
c0e0fcda	307	if (ret) {
6f1c1e71 JMC	308	dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
	309	goto err_del_irqc;
	310	}
dae8a969	311
a259f389	312	ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL);
742413a4	313	if (ret < 0) {
6f1c1e71 JMC	314	dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
6f1c1e71 JMC	315	goto err_del_rtc_irqc;
742413a4	316	}
dae8a969	317
6f1c1e71 JMC	318	return 0;
	319
	320	err_del_rtc_irqc:
	321	regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
	322	err_del_irqc:
	323	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
	324	err_unregister_i2c:
a259f389 JMC	325	if (max77686->type == TYPE_MAX77686)
a259f389 JMC	326	i2c_unregister_device(max77686->rtc);
6f1c1e71	327
dae8a969 JL	328	return ret;
	329	}
	330
	331	static int max77686_i2c_remove(struct i2c_client *i2c)
	332	{
	333	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
	334
	335	mfd_remove_devices(max77686->dev);
6f1c1e71 JMC	336
	337	regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
	338	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
	339
a259f389 JMC	340	if (max77686->type == TYPE_MAX77686)
a259f389 JMC	341	i2c_unregister_device(max77686->rtc);
dae8a969 JL	342
	343	return 0;
	344	}
	345
	346	static const struct i2c_device_id max77686_i2c_id[] = {
	347	{ "max77686", TYPE_MAX77686 },
	348	{ }
	349	};
	350	MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
	351
2b52b5d5 JMC	352	#ifdef CONFIG_PM_SLEEP
	353	static int max77686_suspend(struct device *dev)
	354	{
1b5420e1	355	struct i2c_client *i2c = to_i2c_client(dev);
2b52b5d5 JMC	356	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
	357
	358	if (device_may_wakeup(dev))
	359	enable_irq_wake(max77686->irq);
	360
	361	/*
	362	* IRQ must be disabled during suspend because if it happens
	363	* while suspended it will be handled before resuming I2C.
	364	*
	365	* When device is woken up from suspend (e.g. by RTC wake alarm),
	366	* an interrupt occurs before resuming I2C bus controller.
	367	* Interrupt handler tries to read registers but this read
	368	* will fail because I2C is still suspended.
	369	*/
	370	disable_irq(max77686->irq);
	371
	372	return 0;
	373	}
	374
	375	static int max77686_resume(struct device *dev)
	376	{
1b5420e1	377	struct i2c_client *i2c = to_i2c_client(dev);
2b52b5d5 JMC	378	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
	379
	380	if (device_may_wakeup(dev))
	381	disable_irq_wake(max77686->irq);
	382
	383	enable_irq(max77686->irq);
	384
	385	return 0;
	386	}
	387	#endif /* CONFIG_PM_SLEEP */
	388
	389	static SIMPLE_DEV_PM_OPS(max77686_pm, max77686_suspend, max77686_resume);
	390
dae8a969 JL	391	static struct i2c_driver max77686_i2c_driver = {
	392	.driver = {
	393	.name = "max77686",
2b52b5d5	394	.pm = &max77686_pm,
c1516f84	395	.of_match_table = of_match_ptr(max77686_pmic_dt_match),
dae8a969 JL	396	},
	397	.probe = max77686_i2c_probe,
	398	.remove = max77686_i2c_remove,
	399	.id_table = max77686_i2c_id,
	400	};
	401
	402	static int __init max77686_i2c_init(void)
	403	{
	404	return i2c_add_driver(&max77686_i2c_driver);
	405	}
	406	/* init early so consumer devices can complete system boot */
	407	subsys_initcall(max77686_i2c_init);
	408
	409	static void __exit max77686_i2c_exit(void)
	410	{
	411	i2c_del_driver(&max77686_i2c_driver);
	412	}
	413	module_exit(max77686_i2c_exit);
	414
a259f389	415	MODULE_DESCRIPTION("MAXIM 77686/802 multi-function core driver");
dae8a969 JL	416	MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
dae8a969 JL	417	MODULE_LICENSE("GPL");