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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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.
 */

#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_device(i2c->adapter, MAX8907_RTC_I2C_ADDR);
	if (IS_ERR(max8907->i2c_rtc)) {
		ret = PTR_ERR(max8907->i2c_rtc);
		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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
a91d2f8d GY	2	/*
	3	* max8907.c - mfd driver for MAX8907
	4	*
	5	* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
	6	* Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
a91d2f8d GY	7	*/
	8
	9	#include <linux/err.h>
	10	#include <linux/i2c.h>
	11	#include <linux/init.h>
	12	#include <linux/interrupt.h>
	13	#include <linux/irq.h>
	14	#include <linux/mfd/core.h>
	15	#include <linux/mfd/max8907.h>
	16	#include <linux/module.h>
e4081da4	17	#include <linux/of.h>
a91d2f8d GY	18	#include <linux/of_device.h>
	19	#include <linux/regmap.h>
	20	#include <linux/slab.h>
	21
7c0517b1	22	static const struct mfd_cell max8907_cells[] = {
a91d2f8d GY	23	{ .name = "max8907-regulator", },
	24	{ .name = "max8907-rtc", },
	25	};
	26
	27	static bool max8907_gen_is_volatile_reg(struct device *dev, unsigned int reg)
	28	{
	29	switch (reg) {
	30	case MAX8907_REG_ON_OFF_IRQ1:
	31	case MAX8907_REG_ON_OFF_STAT:
	32	case MAX8907_REG_ON_OFF_IRQ2:
	33	case MAX8907_REG_CHG_IRQ1:
	34	case MAX8907_REG_CHG_IRQ2:
	35	case MAX8907_REG_CHG_STAT:
	36	return true;
	37	default:
	38	return false;
	39	}
	40	}
	41
	42	static bool max8907_gen_is_precious_reg(struct device *dev, unsigned int reg)
	43	{
	44	switch (reg) {
	45	case MAX8907_REG_ON_OFF_IRQ1:
	46	case MAX8907_REG_ON_OFF_IRQ2:
	47	case MAX8907_REG_CHG_IRQ1:
	48	case MAX8907_REG_CHG_IRQ2:
	49	return true;
	50	default:
	51	return false;
	52	}
	53	}
	54
	55	static bool max8907_gen_is_writeable_reg(struct device *dev, unsigned int reg)
	56	{
	57	return !max8907_gen_is_volatile_reg(dev, reg);
	58	}
	59
	60	static const struct regmap_config max8907_regmap_gen_config = {
	61	.reg_bits = 8,
	62	.val_bits = 8,
	63	.volatile_reg = max8907_gen_is_volatile_reg,
	64	.precious_reg = max8907_gen_is_precious_reg,
	65	.writeable_reg = max8907_gen_is_writeable_reg,
	66	.max_register = MAX8907_REG_LDO20VOUT,
	67	.cache_type = REGCACHE_RBTREE,
	68	};
	69
	70	static bool max8907_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
	71	{
	72	if (reg <= MAX8907_REG_RTC_YEAR2)
	73	return true;
	74
	75	switch (reg) {
	76	case MAX8907_REG_RTC_STATUS:
	77	case MAX8907_REG_RTC_IRQ:
	78	return true;
	79	default:
	80	return false;
	81	}
	82	}
	83
	84	static bool max8907_rtc_is_precious_reg(struct device *dev, unsigned int reg)
	85	{
	86	switch (reg) {
87	case MAX8907_REG_RTC_IRQ:
88	return true;
89	default:
90	return false;
91	}
92	}
93
94	static bool max8907_rtc_is_writeable_reg(struct device *dev, unsigned int reg)
95	{
96	switch (reg) {
97	case MAX8907_REG_RTC_STATUS:
98	case MAX8907_REG_RTC_IRQ:
99	return false;
100	default:
101	return true;
102	}
103	}
104
105	static const struct regmap_config max8907_regmap_rtc_config = {
106	.reg_bits = 8,
107	.val_bits = 8,
108	.volatile_reg = max8907_rtc_is_volatile_reg,
109	.precious_reg = max8907_rtc_is_precious_reg,
110	.writeable_reg = max8907_rtc_is_writeable_reg,
111	.max_register = MAX8907_REG_MPL_CNTL,
112	.cache_type = REGCACHE_RBTREE,
113	};
114
115	static const struct regmap_irq max8907_chg_irqs[] = {
116	{ .reg_offset = 0, .mask = 1 << 0, },
117	{ .reg_offset = 0, .mask = 1 << 1, },
118	{ .reg_offset = 0, .mask = 1 << 2, },
119	{ .reg_offset = 1, .mask = 1 << 0, },
120	{ .reg_offset = 1, .mask = 1 << 1, },
121	{ .reg_offset = 1, .mask = 1 << 2, },
122	{ .reg_offset = 1, .mask = 1 << 3, },
123	{ .reg_offset = 1, .mask = 1 << 4, },
124	{ .reg_offset = 1, .mask = 1 << 5, },
125	{ .reg_offset = 1, .mask = 1 << 6, },
126	{ .reg_offset = 1, .mask = 1 << 7, },
127	};
128
129	static const struct regmap_irq_chip max8907_chg_irq_chip = {
130	.name = "max8907 chg",
131	.status_base = MAX8907_REG_CHG_IRQ1,
132	.mask_base = MAX8907_REG_CHG_IRQ1_MASK,
133	.wake_base = MAX8907_REG_CHG_IRQ1_MASK,
134	.irq_reg_stride = MAX8907_REG_CHG_IRQ2 - MAX8907_REG_CHG_IRQ1,
135	.num_regs = 2,
136	.irqs = max8907_chg_irqs,
137	.num_irqs = ARRAY_SIZE(max8907_chg_irqs),
138	};
139
140	static const struct regmap_irq max8907_on_off_irqs[] = {
141	{ .reg_offset = 0, .mask = 1 << 0, },
142	{ .reg_offset = 0, .mask = 1 << 1, },
143	{ .reg_offset = 0, .mask = 1 << 2, },
144	{ .reg_offset = 0, .mask = 1 << 3, },
145	{ .reg_offset = 0, .mask = 1 << 4, },
146	{ .reg_offset = 0, .mask = 1 << 5, },
147	{ .reg_offset = 0, .mask = 1 << 6, },
148	{ .reg_offset = 0, .mask = 1 << 7, },
149	{ .reg_offset = 1, .mask = 1 << 0, },
150	{ .reg_offset = 1, .mask = 1 << 1, },
151	};
152
153	static const struct regmap_irq_chip max8907_on_off_irq_chip = {
154	.name = "max8907 on_off",
155	.status_base = MAX8907_REG_ON_OFF_IRQ1,
156	.mask_base = MAX8907_REG_ON_OFF_IRQ1_MASK,
157	.irq_reg_stride = MAX8907_REG_ON_OFF_IRQ2 - MAX8907_REG_ON_OFF_IRQ1,
158	.num_regs = 2,
159	.irqs = max8907_on_off_irqs,
160	.num_irqs = ARRAY_SIZE(max8907_on_off_irqs),
161	};
162
163	static const struct regmap_irq max8907_rtc_irqs[] = {
164	{ .reg_offset = 0, .mask = 1 << 2, },
165	{ .reg_offset = 0, .mask = 1 << 3, },
166	};
167
168	static const struct regmap_irq_chip max8907_rtc_irq_chip = {
169	.name = "max8907 rtc",
170	.status_base = MAX8907_REG_RTC_IRQ,
171	.mask_base = MAX8907_REG_RTC_IRQ_MASK,
172	.num_regs = 1,
173	.irqs = max8907_rtc_irqs,
174	.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
175	};
176
0f471916	177	static struct max8907 *max8907_pm_off;
9582fdcb SW	178	static void max8907_power_off(void)
	179	{
	180	regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
	181	MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
	182	}
	183
f791be49	184	static int max8907_i2c_probe(struct i2c_client *i2c,
a91d2f8d GY	185	const struct i2c_device_id *id)
	186	{
	187	struct max8907 *max8907;
	188	int ret;
9582fdcb SW	189	struct max8907_platform_data *pdata = dev_get_platdata(&i2c->dev);
	190	bool pm_off = false;
	191
	192	if (pdata)
	193	pm_off = pdata->pm_off;
	194	else if (i2c->dev.of_node)
	195	pm_off = of_property_read_bool(i2c->dev.of_node,
	196	"maxim,system-power-controller");
a91d2f8d GY	197
	198	max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);
	199	if (!max8907) {
	200	ret = -ENOMEM;
	201	goto err_alloc_drvdata;
	202	}
	203
	204	max8907->dev = &i2c->dev;
	205	dev_set_drvdata(max8907->dev, max8907);
	206
	207	max8907->i2c_gen = i2c;
	208	i2c_set_clientdata(i2c, max8907);
	209	max8907->regmap_gen = devm_regmap_init_i2c(i2c,
	210	&max8907_regmap_gen_config);
	211	if (IS_ERR(max8907->regmap_gen)) {
	212	ret = PTR_ERR(max8907->regmap_gen);
	213	dev_err(&i2c->dev, "gen regmap init failed: %d\n", ret);
	214	goto err_regmap_gen;
	215	}
	216
b8afcd54 WS	217	max8907->i2c_rtc = i2c_new_dummy_device(i2c->adapter, MAX8907_RTC_I2C_ADDR);
	218	if (IS_ERR(max8907->i2c_rtc)) {
	219	ret = PTR_ERR(max8907->i2c_rtc);
a91d2f8d GY	220	goto err_dummy_rtc;
	221	}
	222	i2c_set_clientdata(max8907->i2c_rtc, max8907);
	223	max8907->regmap_rtc = devm_regmap_init_i2c(max8907->i2c_rtc,
	224	&max8907_regmap_rtc_config);
	225	if (IS_ERR(max8907->regmap_rtc)) {
	226	ret = PTR_ERR(max8907->regmap_rtc);
	227	dev_err(&i2c->dev, "rtc regmap init failed: %d\n", ret);
	228	goto err_regmap_rtc;
	229	}
	230
	231	irq_set_status_flags(max8907->i2c_gen->irq, IRQ_NOAUTOEN);
	232
	233	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
	234	IRQF_ONESHOT \| IRQF_SHARED, -1,
	235	&max8907_chg_irq_chip,
	236	&max8907->irqc_chg);
	237	if (ret != 0) {
	238	dev_err(&i2c->dev, "failed to add chg irq chip: %d\n", ret);
	239	goto err_irqc_chg;
	240	}
	241	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
	242	IRQF_ONESHOT \| IRQF_SHARED, -1,
	243	&max8907_on_off_irq_chip,
	244	&max8907->irqc_on_off);
	245	if (ret != 0) {
	246	dev_err(&i2c->dev, "failed to add on off irq chip: %d\n", ret);
	247	goto err_irqc_on_off;
	248	}
	249	ret = regmap_add_irq_chip(max8907->regmap_rtc, max8907->i2c_gen->irq,
	250	IRQF_ONESHOT \| IRQF_SHARED, -1,
	251	&max8907_rtc_irq_chip,
	252	&max8907->irqc_rtc);
	253	if (ret != 0) {
	254	dev_err(&i2c->dev, "failed to add rtc irq chip: %d\n", ret);
	255	goto err_irqc_rtc;
	256	}
	257
	258	enable_irq(max8907->i2c_gen->irq);
	259
	260	ret = mfd_add_devices(max8907->dev, -1, max8907_cells,
	261	ARRAY_SIZE(max8907_cells), NULL, 0, NULL);
	262	if (ret != 0) {
	263	dev_err(&i2c->dev, "failed to add MFD devices %d\n", ret);
	264	goto err_add_devices;
	265	}
	266
9582fdcb SW	267	if (pm_off && !pm_power_off) {
	268	max8907_pm_off = max8907;
	269	pm_power_off = max8907_power_off;
	270	}
	271
a91d2f8d GY	272	return 0;
	273
	274	err_add_devices:
	275	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
	276	err_irqc_rtc:
	277	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
	278	err_irqc_on_off:
	279	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
	280	err_irqc_chg:
	281	err_regmap_rtc:
	282	i2c_unregister_device(max8907->i2c_rtc);
	283	err_dummy_rtc:
	284	err_regmap_gen:
	285	err_alloc_drvdata:
	286	return ret;
	287	}
	288
4740f73f	289	static int max8907_i2c_remove(struct i2c_client *i2c)
a91d2f8d GY	290	{
	291	struct max8907 *max8907 = i2c_get_clientdata(i2c);
	292
	293	mfd_remove_devices(max8907->dev);
	294
	295	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
	296	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
	297	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
	298
	299	i2c_unregister_device(max8907->i2c_rtc);
	300
	301	return 0;
	302	}
	303
	304	#ifdef CONFIG_OF
488e9003	305	static const struct of_device_id max8907_of_match[] = {
a91d2f8d GY	306	{ .compatible = "maxim,max8907" },
	307	{ },
	308	};
	309	MODULE_DEVICE_TABLE(of, max8907_of_match);
	310	#endif
	311
	312	static const struct i2c_device_id max8907_i2c_id[] = {
	313	{"max8907", 0},
	314	{}
	315	};
	316	MODULE_DEVICE_TABLE(i2c, max8907_i2c_id);
	317
	318	static struct i2c_driver max8907_i2c_driver = {
	319	.driver = {
	320	.name = "max8907",
a91d2f8d GY	321	.of_match_table = of_match_ptr(max8907_of_match),
	322	},
	323	.probe = max8907_i2c_probe,
	324	.remove = max8907_i2c_remove,
	325	.id_table = max8907_i2c_id,
	326	};
	327
	328	static int __init max8907_i2c_init(void)
	329	{
	330	int ret = -ENODEV;
	331
	332	ret = i2c_add_driver(&max8907_i2c_driver);
	333	if (ret != 0)
	334	pr_err("Failed to register I2C driver: %d\n", ret);
	335
	336	return ret;
	337	}
	338	subsys_initcall(max8907_i2c_init);
	339
	340	static void __exit max8907_i2c_exit(void)
	341	{
	342	i2c_del_driver(&max8907_i2c_driver);
	343	}
	344	module_exit(max8907_i2c_exit);
	345
	346	MODULE_DESCRIPTION("MAX8907 multi-function core driver");
	347	MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
	348	MODULE_LICENSE("GPL v2");