[linux-2.6-block.git] / drivers / mfd / max8907.c

/*
 * max8907.c - mfd driver for MAX8907
 *
 * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
 * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8907.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>

static const struct mfd_cell max8907_cells[] = {
	{ .name = "max8907-regulator", },
	{ .name = "max8907-rtc", },
};

static bool max8907_gen_is_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX8907_REG_ON_OFF_IRQ1:
	case MAX8907_REG_ON_OFF_STAT:
	case MAX8907_REG_ON_OFF_IRQ2:
	case MAX8907_REG_CHG_IRQ1:
	case MAX8907_REG_CHG_IRQ2:
	case MAX8907_REG_CHG_STAT:
		return true;
	default:
		return false;
	}
}

static bool max8907_gen_is_precious_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX8907_REG_ON_OFF_IRQ1:
	case MAX8907_REG_ON_OFF_IRQ2:
	case MAX8907_REG_CHG_IRQ1:
	case MAX8907_REG_CHG_IRQ2:
		return true;
	default:
		return false;
	}
}

static bool max8907_gen_is_writeable_reg(struct device *dev, unsigned int reg)
{
	return !max8907_gen_is_volatile_reg(dev, reg);
}

static const struct regmap_config max8907_regmap_gen_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.volatile_reg = max8907_gen_is_volatile_reg,
	.precious_reg = max8907_gen_is_precious_reg,
	.writeable_reg = max8907_gen_is_writeable_reg,
	.max_register = MAX8907_REG_LDO20VOUT,
	.cache_type = REGCACHE_RBTREE,
};

static bool max8907_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
{
	if (reg <= MAX8907_REG_RTC_YEAR2)
		return true;

	switch (reg) {
	case MAX8907_REG_RTC_STATUS:
	case MAX8907_REG_RTC_IRQ:
		return true;
	default:
		return false;
	}
}

static bool max8907_rtc_is_precious_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX8907_REG_RTC_IRQ:
		return true;
	default:
		return false;
	}
}

static bool max8907_rtc_is_writeable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case MAX8907_REG_RTC_STATUS:
	case MAX8907_REG_RTC_IRQ:
		return false;
	default:
		return true;
	}
}

static const struct regmap_config max8907_regmap_rtc_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.volatile_reg = max8907_rtc_is_volatile_reg,
	.precious_reg = max8907_rtc_is_precious_reg,
	.writeable_reg = max8907_rtc_is_writeable_reg,
	.max_register = MAX8907_REG_MPL_CNTL,
	.cache_type = REGCACHE_RBTREE,
};

static const struct regmap_irq max8907_chg_irqs[] = {
	{ .reg_offset = 0, .mask = 1 << 0, },
	{ .reg_offset = 0, .mask = 1 << 1, },
	{ .reg_offset = 0, .mask = 1 << 2, },
	{ .reg_offset = 1, .mask = 1 << 0, },
	{ .reg_offset = 1, .mask = 1 << 1, },
	{ .reg_offset = 1, .mask = 1 << 2, },
	{ .reg_offset = 1, .mask = 1 << 3, },
	{ .reg_offset = 1, .mask = 1 << 4, },
	{ .reg_offset = 1, .mask = 1 << 5, },
	{ .reg_offset = 1, .mask = 1 << 6, },
	{ .reg_offset = 1, .mask = 1 << 7, },
};

static const struct regmap_irq_chip max8907_chg_irq_chip = {
	.name = "max8907 chg",
	.status_base = MAX8907_REG_CHG_IRQ1,
	.mask_base = MAX8907_REG_CHG_IRQ1_MASK,
	.wake_base = MAX8907_REG_CHG_IRQ1_MASK,
	.irq_reg_stride = MAX8907_REG_CHG_IRQ2 - MAX8907_REG_CHG_IRQ1,
	.num_regs = 2,
	.irqs = max8907_chg_irqs,
	.num_irqs = ARRAY_SIZE(max8907_chg_irqs),
};

static const struct regmap_irq max8907_on_off_irqs[] = {
	{ .reg_offset = 0, .mask = 1 << 0, },
	{ .reg_offset = 0, .mask = 1 << 1, },
	{ .reg_offset = 0, .mask = 1 << 2, },
	{ .reg_offset = 0, .mask = 1 << 3, },
	{ .reg_offset = 0, .mask = 1 << 4, },
	{ .reg_offset = 0, .mask = 1 << 5, },
	{ .reg_offset = 0, .mask = 1 << 6, },
	{ .reg_offset = 0, .mask = 1 << 7, },
	{ .reg_offset = 1, .mask = 1 << 0, },
	{ .reg_offset = 1, .mask = 1 << 1, },
};

static const struct regmap_irq_chip max8907_on_off_irq_chip = {
	.name = "max8907 on_off",
	.status_base = MAX8907_REG_ON_OFF_IRQ1,
	.mask_base = MAX8907_REG_ON_OFF_IRQ1_MASK,
	.irq_reg_stride = MAX8907_REG_ON_OFF_IRQ2 - MAX8907_REG_ON_OFF_IRQ1,
	.num_regs = 2,
	.irqs = max8907_on_off_irqs,
	.num_irqs = ARRAY_SIZE(max8907_on_off_irqs),
};

static const struct regmap_irq max8907_rtc_irqs[] = {
	{ .reg_offset = 0, .mask = 1 << 2, },
	{ .reg_offset = 0, .mask = 1 << 3, },
};

static const struct regmap_irq_chip max8907_rtc_irq_chip = {
	.name = "max8907 rtc",
	.status_base = MAX8907_REG_RTC_IRQ,
	.mask_base = MAX8907_REG_RTC_IRQ_MASK,
	.num_regs = 1,
	.irqs = max8907_rtc_irqs,
	.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
};

static struct max8907 *max8907_pm_off;
static void max8907_power_off(void)
{
	regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
			MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
}

static int max8907_i2c_probe(struct i2c_client *i2c,
				       const struct i2c_device_id *id)
{
	struct max8907 *max8907;
	int ret;
	struct max8907_platform_data *pdata = dev_get_platdata(&i2c->dev);
	bool pm_off = false;

	if (pdata)
		pm_off = pdata->pm_off;
	else if (i2c->dev.of_node)
		pm_off = of_property_read_bool(i2c->dev.of_node,
					"maxim,system-power-controller");

	max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);
	if (!max8907) {
		ret = -ENOMEM;
		goto err_alloc_drvdata;
	}

	max8907->dev = &i2c->dev;
	dev_set_drvdata(max8907->dev, max8907);

	max8907->i2c_gen = i2c;
	i2c_set_clientdata(i2c, max8907);
	max8907->regmap_gen = devm_regmap_init_i2c(i2c,
						&max8907_regmap_gen_config);
	if (IS_ERR(max8907->regmap_gen)) {
		ret = PTR_ERR(max8907->regmap_gen);
		dev_err(&i2c->dev, "gen regmap init failed: %d\n", ret);
		goto err_regmap_gen;
	}

	max8907->i2c_rtc = i2c_new_dummy(i2c->adapter, MAX8907_RTC_I2C_ADDR);
	if (!max8907->i2c_rtc) {
		ret = -ENOMEM;
		goto err_dummy_rtc;
	}
	i2c_set_clientdata(max8907->i2c_rtc, max8907);
	max8907->regmap_rtc = devm_regmap_init_i2c(max8907->i2c_rtc,
						&max8907_regmap_rtc_config);
	if (IS_ERR(max8907->regmap_rtc)) {
		ret = PTR_ERR(max8907->regmap_rtc);
		dev_err(&i2c->dev, "rtc regmap init failed: %d\n", ret);
		goto err_regmap_rtc;
	}

	irq_set_status_flags(max8907->i2c_gen->irq, IRQ_NOAUTOEN);

	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
				  IRQF_ONESHOT | IRQF_SHARED, -1,
				  &max8907_chg_irq_chip,
				  &max8907->irqc_chg);
	if (ret != 0) {
		dev_err(&i2c->dev, "failed to add chg irq chip: %d\n", ret);
		goto err_irqc_chg;
	}
	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
				  IRQF_ONESHOT | IRQF_SHARED, -1,
				  &max8907_on_off_irq_chip,
				  &max8907->irqc_on_off);
	if (ret != 0) {
		dev_err(&i2c->dev, "failed to add on off irq chip: %d\n", ret);
		goto err_irqc_on_off;
	}
	ret = regmap_add_irq_chip(max8907->regmap_rtc, max8907->i2c_gen->irq,
				  IRQF_ONESHOT | IRQF_SHARED, -1,
				  &max8907_rtc_irq_chip,
				  &max8907->irqc_rtc);
	if (ret != 0) {
		dev_err(&i2c->dev, "failed to add rtc irq chip: %d\n", ret);
		goto err_irqc_rtc;
	}

	enable_irq(max8907->i2c_gen->irq);

	ret = mfd_add_devices(max8907->dev, -1, max8907_cells,
			      ARRAY_SIZE(max8907_cells), NULL, 0, NULL);
	if (ret != 0) {
		dev_err(&i2c->dev, "failed to add MFD devices %d\n", ret);
		goto err_add_devices;
	}

	if (pm_off && !pm_power_off) {
		max8907_pm_off = max8907;
		pm_power_off = max8907_power_off;
	}

	return 0;

err_add_devices:
	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
err_irqc_rtc:
	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
err_irqc_on_off:
	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
err_irqc_chg:
err_regmap_rtc:
	i2c_unregister_device(max8907->i2c_rtc);
err_dummy_rtc:
err_regmap_gen:
err_alloc_drvdata:
	return ret;
}

static int max8907_i2c_remove(struct i2c_client *i2c)
{
	struct max8907 *max8907 = i2c_get_clientdata(i2c);

	mfd_remove_devices(max8907->dev);

	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);

	i2c_unregister_device(max8907->i2c_rtc);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id max8907_of_match[] = {
	{ .compatible = "maxim,max8907" },
	{ },
};
MODULE_DEVICE_TABLE(of, max8907_of_match);
#endif

static const struct i2c_device_id max8907_i2c_id[] = {
	{"max8907", 0},
	{}
};
MODULE_DEVICE_TABLE(i2c, max8907_i2c_id);

static struct i2c_driver max8907_i2c_driver = {
	.driver = {
		.name = "max8907",
		.of_match_table = of_match_ptr(max8907_of_match),
	},
	.probe = max8907_i2c_probe,
	.remove = max8907_i2c_remove,
	.id_table = max8907_i2c_id,
};

static int __init max8907_i2c_init(void)
{
	int ret = -ENODEV;

	ret = i2c_add_driver(&max8907_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register I2C driver: %d\n", ret);

	return ret;
}
subsys_initcall(max8907_i2c_init);

static void __exit max8907_i2c_exit(void)
{
	i2c_del_driver(&max8907_i2c_driver);
}
module_exit(max8907_i2c_exit);

MODULE_DESCRIPTION("MAX8907 multi-function core driver");
MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
a91d2f8d GY	1	/*
	2	* max8907.c - mfd driver for MAX8907
	3	*
	4	* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
	5	* Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/err.h>
	13	#include <linux/i2c.h>
	14	#include <linux/init.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/irq.h>
	17	#include <linux/mfd/core.h>
	18	#include <linux/mfd/max8907.h>
	19	#include <linux/module.h>
e4081da4	20	#include <linux/of.h>
a91d2f8d GY	21	#include <linux/of_device.h>
	22	#include <linux/regmap.h>
	23	#include <linux/slab.h>
	24
7c0517b1	25	static const struct mfd_cell max8907_cells[] = {
a91d2f8d GY	26	{ .name = "max8907-regulator", },
	27	{ .name = "max8907-rtc", },
	28	};
	29
	30	static bool max8907_gen_is_volatile_reg(struct device *dev, unsigned int reg)
	31	{
	32	switch (reg) {
	33	case MAX8907_REG_ON_OFF_IRQ1:
	34	case MAX8907_REG_ON_OFF_STAT:
	35	case MAX8907_REG_ON_OFF_IRQ2:
	36	case MAX8907_REG_CHG_IRQ1:
	37	case MAX8907_REG_CHG_IRQ2:
	38	case MAX8907_REG_CHG_STAT:
	39	return true;
	40	default:
	41	return false;
	42	}
	43	}
	44
	45	static bool max8907_gen_is_precious_reg(struct device *dev, unsigned int reg)
	46	{
	47	switch (reg) {
	48	case MAX8907_REG_ON_OFF_IRQ1:
	49	case MAX8907_REG_ON_OFF_IRQ2:
	50	case MAX8907_REG_CHG_IRQ1:
	51	case MAX8907_REG_CHG_IRQ2:
	52	return true;
	53	default:
	54	return false;
	55	}
	56	}
	57
	58	static bool max8907_gen_is_writeable_reg(struct device *dev, unsigned int reg)
	59	{
	60	return !max8907_gen_is_volatile_reg(dev, reg);
	61	}
	62
	63	static const struct regmap_config max8907_regmap_gen_config = {
	64	.reg_bits = 8,
	65	.val_bits = 8,
	66	.volatile_reg = max8907_gen_is_volatile_reg,
	67	.precious_reg = max8907_gen_is_precious_reg,
	68	.writeable_reg = max8907_gen_is_writeable_reg,
	69	.max_register = MAX8907_REG_LDO20VOUT,
	70	.cache_type = REGCACHE_RBTREE,
	71	};
	72
	73	static bool max8907_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
	74	{
	75	if (reg <= MAX8907_REG_RTC_YEAR2)
	76	return true;
	77
	78	switch (reg) {
	79	case MAX8907_REG_RTC_STATUS:
	80	case MAX8907_REG_RTC_IRQ:
	81	return true;
	82	default:
	83	return false;
	84	}
	85	}
	86
	87	static bool max8907_rtc_is_precious_reg(struct device *dev, unsigned int reg)
	88	{
	89	switch (reg) {
90	case MAX8907_REG_RTC_IRQ:
91	return true;
92	default:
93	return false;
94	}
95	}
96
97	static bool max8907_rtc_is_writeable_reg(struct device *dev, unsigned int reg)
98	{
99	switch (reg) {
100	case MAX8907_REG_RTC_STATUS:
101	case MAX8907_REG_RTC_IRQ:
102	return false;
103	default:
104	return true;
105	}
106	}
107
108	static const struct regmap_config max8907_regmap_rtc_config = {
109	.reg_bits = 8,
110	.val_bits = 8,
111	.volatile_reg = max8907_rtc_is_volatile_reg,
112	.precious_reg = max8907_rtc_is_precious_reg,
113	.writeable_reg = max8907_rtc_is_writeable_reg,
114	.max_register = MAX8907_REG_MPL_CNTL,
115	.cache_type = REGCACHE_RBTREE,
116	};
117
118	static const struct regmap_irq max8907_chg_irqs[] = {
119	{ .reg_offset = 0, .mask = 1 << 0, },
120	{ .reg_offset = 0, .mask = 1 << 1, },
121	{ .reg_offset = 0, .mask = 1 << 2, },
122	{ .reg_offset = 1, .mask = 1 << 0, },
123	{ .reg_offset = 1, .mask = 1 << 1, },
124	{ .reg_offset = 1, .mask = 1 << 2, },
125	{ .reg_offset = 1, .mask = 1 << 3, },
126	{ .reg_offset = 1, .mask = 1 << 4, },
127	{ .reg_offset = 1, .mask = 1 << 5, },
128	{ .reg_offset = 1, .mask = 1 << 6, },
129	{ .reg_offset = 1, .mask = 1 << 7, },
130	};
131
132	static const struct regmap_irq_chip max8907_chg_irq_chip = {
133	.name = "max8907 chg",
134	.status_base = MAX8907_REG_CHG_IRQ1,
135	.mask_base = MAX8907_REG_CHG_IRQ1_MASK,
136	.wake_base = MAX8907_REG_CHG_IRQ1_MASK,
137	.irq_reg_stride = MAX8907_REG_CHG_IRQ2 - MAX8907_REG_CHG_IRQ1,
138	.num_regs = 2,
139	.irqs = max8907_chg_irqs,
140	.num_irqs = ARRAY_SIZE(max8907_chg_irqs),
141	};
142
143	static const struct regmap_irq max8907_on_off_irqs[] = {
144	{ .reg_offset = 0, .mask = 1 << 0, },
145	{ .reg_offset = 0, .mask = 1 << 1, },
146	{ .reg_offset = 0, .mask = 1 << 2, },
147	{ .reg_offset = 0, .mask = 1 << 3, },
148	{ .reg_offset = 0, .mask = 1 << 4, },
149	{ .reg_offset = 0, .mask = 1 << 5, },
150	{ .reg_offset = 0, .mask = 1 << 6, },
151	{ .reg_offset = 0, .mask = 1 << 7, },
152	{ .reg_offset = 1, .mask = 1 << 0, },
153	{ .reg_offset = 1, .mask = 1 << 1, },
154	};
155
156	static const struct regmap_irq_chip max8907_on_off_irq_chip = {
157	.name = "max8907 on_off",
158	.status_base = MAX8907_REG_ON_OFF_IRQ1,
159	.mask_base = MAX8907_REG_ON_OFF_IRQ1_MASK,
160	.irq_reg_stride = MAX8907_REG_ON_OFF_IRQ2 - MAX8907_REG_ON_OFF_IRQ1,
161	.num_regs = 2,
162	.irqs = max8907_on_off_irqs,
163	.num_irqs = ARRAY_SIZE(max8907_on_off_irqs),
164	};
165
166	static const struct regmap_irq max8907_rtc_irqs[] = {
167	{ .reg_offset = 0, .mask = 1 << 2, },
168	{ .reg_offset = 0, .mask = 1 << 3, },
169	};
170
171	static const struct regmap_irq_chip max8907_rtc_irq_chip = {
172	.name = "max8907 rtc",
173	.status_base = MAX8907_REG_RTC_IRQ,
174	.mask_base = MAX8907_REG_RTC_IRQ_MASK,
175	.num_regs = 1,
176	.irqs = max8907_rtc_irqs,
177	.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
178	};
179
0f471916	180	static struct max8907 *max8907_pm_off;
9582fdcb SW	181	static void max8907_power_off(void)
	182	{
	183	regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
	184	MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
	185	}
	186
f791be49	187	static int max8907_i2c_probe(struct i2c_client *i2c,
a91d2f8d GY	188	const struct i2c_device_id *id)
	189	{
	190	struct max8907 *max8907;
	191	int ret;
9582fdcb SW	192	struct max8907_platform_data *pdata = dev_get_platdata(&i2c->dev);
	193	bool pm_off = false;
	194
	195	if (pdata)
	196	pm_off = pdata->pm_off;
	197	else if (i2c->dev.of_node)
	198	pm_off = of_property_read_bool(i2c->dev.of_node,
	199	"maxim,system-power-controller");
a91d2f8d GY	200
	201	max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);
	202	if (!max8907) {
	203	ret = -ENOMEM;
	204	goto err_alloc_drvdata;
	205	}
	206
	207	max8907->dev = &i2c->dev;
	208	dev_set_drvdata(max8907->dev, max8907);
	209
	210	max8907->i2c_gen = i2c;
	211	i2c_set_clientdata(i2c, max8907);
	212	max8907->regmap_gen = devm_regmap_init_i2c(i2c,
	213	&max8907_regmap_gen_config);
	214	if (IS_ERR(max8907->regmap_gen)) {
	215	ret = PTR_ERR(max8907->regmap_gen);
	216	dev_err(&i2c->dev, "gen regmap init failed: %d\n", ret);
	217	goto err_regmap_gen;
	218	}
	219
	220	max8907->i2c_rtc = i2c_new_dummy(i2c->adapter, MAX8907_RTC_I2C_ADDR);
	221	if (!max8907->i2c_rtc) {
	222	ret = -ENOMEM;
	223	goto err_dummy_rtc;
	224	}
	225	i2c_set_clientdata(max8907->i2c_rtc, max8907);
	226	max8907->regmap_rtc = devm_regmap_init_i2c(max8907->i2c_rtc,
	227	&max8907_regmap_rtc_config);
	228	if (IS_ERR(max8907->regmap_rtc)) {
	229	ret = PTR_ERR(max8907->regmap_rtc);
	230	dev_err(&i2c->dev, "rtc regmap init failed: %d\n", ret);
	231	goto err_regmap_rtc;
	232	}
	233
	234	irq_set_status_flags(max8907->i2c_gen->irq, IRQ_NOAUTOEN);
	235
	236	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
	237	IRQF_ONESHOT \| IRQF_SHARED, -1,
	238	&max8907_chg_irq_chip,
	239	&max8907->irqc_chg);
	240	if (ret != 0) {
	241	dev_err(&i2c->dev, "failed to add chg irq chip: %d\n", ret);
	242	goto err_irqc_chg;
	243	}
	244	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
	245	IRQF_ONESHOT \| IRQF_SHARED, -1,
	246	&max8907_on_off_irq_chip,
	247	&max8907->irqc_on_off);
	248	if (ret != 0) {
	249	dev_err(&i2c->dev, "failed to add on off irq chip: %d\n", ret);
	250	goto err_irqc_on_off;
	251	}
	252	ret = regmap_add_irq_chip(max8907->regmap_rtc, max8907->i2c_gen->irq,
	253	IRQF_ONESHOT \| IRQF_SHARED, -1,
	254	&max8907_rtc_irq_chip,
	255	&max8907->irqc_rtc);
	256	if (ret != 0) {
	257	dev_err(&i2c->dev, "failed to add rtc irq chip: %d\n", ret);
	258	goto err_irqc_rtc;
	259	}
	260
	261	enable_irq(max8907->i2c_gen->irq);
	262
	263	ret = mfd_add_devices(max8907->dev, -1, max8907_cells,
264	ARRAY_SIZE(max8907_cells), NULL, 0, NULL);
265	if (ret != 0) {
266	dev_err(&i2c->dev, "failed to add MFD devices %d\n", ret);
267	goto err_add_devices;
268	}
269
9582fdcb SW	270	if (pm_off && !pm_power_off) {
	271	max8907_pm_off = max8907;
	272	pm_power_off = max8907_power_off;
	273	}
	274
a91d2f8d GY	275	return 0;
	276
	277	err_add_devices:
	278	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
	279	err_irqc_rtc:
	280	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
	281	err_irqc_on_off:
	282	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
	283	err_irqc_chg:
	284	err_regmap_rtc:
	285	i2c_unregister_device(max8907->i2c_rtc);
	286	err_dummy_rtc:
	287	err_regmap_gen:
	288	err_alloc_drvdata:
	289	return ret;
	290	}
	291
4740f73f	292	static int max8907_i2c_remove(struct i2c_client *i2c)
a91d2f8d GY	293	{
	294	struct max8907 *max8907 = i2c_get_clientdata(i2c);
	295
	296	mfd_remove_devices(max8907->dev);
	297
	298	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
	299	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
	300	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
	301
	302	i2c_unregister_device(max8907->i2c_rtc);
	303
	304	return 0;
	305	}
	306
	307	#ifdef CONFIG_OF
488e9003	308	static const struct of_device_id max8907_of_match[] = {
a91d2f8d GY	309	{ .compatible = "maxim,max8907" },
	310	{ },
	311	};
	312	MODULE_DEVICE_TABLE(of, max8907_of_match);
	313	#endif
	314
	315	static const struct i2c_device_id max8907_i2c_id[] = {
	316	{"max8907", 0},
	317	{}
	318	};
	319	MODULE_DEVICE_TABLE(i2c, max8907_i2c_id);
	320
	321	static struct i2c_driver max8907_i2c_driver = {
	322	.driver = {
	323	.name = "max8907",
a91d2f8d GY	324	.of_match_table = of_match_ptr(max8907_of_match),
	325	},
	326	.probe = max8907_i2c_probe,
	327	.remove = max8907_i2c_remove,
	328	.id_table = max8907_i2c_id,
	329	};
	330
	331	static int __init max8907_i2c_init(void)
	332	{
	333	int ret = -ENODEV;
	334
	335	ret = i2c_add_driver(&max8907_i2c_driver);
	336	if (ret != 0)
	337	pr_err("Failed to register I2C driver: %d\n", ret);
	338
	339	return ret;
	340	}
	341	subsys_initcall(max8907_i2c_init);
	342
	343	static void __exit max8907_i2c_exit(void)
	344	{
	345	i2c_del_driver(&max8907_i2c_driver);
	346	}
	347	module_exit(max8907_i2c_exit);
	348
	349	MODULE_DESCRIPTION("MAX8907 multi-function core driver");
	350	MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
	351	MODULE_LICENSE("GPL v2");