[deliverable/linux.git] / drivers / mfd / sec-core.c

/*
 * sec-core.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd
 *              http://www.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.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/irq.h>
#include <linux/mfd/samsung/rtc.h>
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s5m8763.h>
#include <linux/mfd/samsung/s5m8767.h>
#include <linux/regmap.h>

static const struct mfd_cell s5m8751_devs[] = {
	{
		.name = "s5m8751-pmic",
	}, {
		.name = "s5m-charger",
	}, {
		.name = "s5m8751-codec",
	},
};

static const struct mfd_cell s5m8763_devs[] = {
	{
		.name = "s5m8763-pmic",
	}, {
		.name = "s5m-rtc",
	}, {
		.name = "s5m-charger",
	},
};

static const struct mfd_cell s5m8767_devs[] = {
	{
		.name = "s5m8767-pmic",
	}, {
		.name = "s5m-rtc",
	}, {
		.name = "s5m8767-clk",
	}
};

static const struct mfd_cell s2mps11_devs[] = {
	{
		.name = "s2mps11-pmic",
	}, {
		.name = "s2mps11-clk",
	}
};

#ifdef CONFIG_OF
static struct of_device_id sec_dt_match[] = {
	{	.compatible = "samsung,s5m8767-pmic",
		.data = (void *)S5M8767X,
	},
	{	.compatible = "samsung,s2mps11-pmic",
		.data = (void *)S2MPS11X,
	},
	{},
};
#endif

static bool s2mps11_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case S2MPS11_REG_INT1M:
	case S2MPS11_REG_INT2M:
	case S2MPS11_REG_INT3M:
		return false;
	default:
		return true;
	}
}

static bool s5m8763_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case S5M8763_REG_IRQM1:
	case S5M8763_REG_IRQM2:
	case S5M8763_REG_IRQM3:
	case S5M8763_REG_IRQM4:
		return false;
	default:
		return true;
	}
}

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

static const struct regmap_config s2mps11_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPS11_REG_L38CTRL,
	.volatile_reg = s2mps11_volatile,
	.cache_type = REGCACHE_FLAT,
};

static const struct regmap_config s5m8763_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S5M8763_REG_LBCNFG2,
	.volatile_reg = s5m8763_volatile,
	.cache_type = REGCACHE_FLAT,
};

static const struct regmap_config s5m8767_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S5M8767_REG_LDO28CTRL,
	.volatile_reg = s2mps11_volatile,
	.cache_type = REGCACHE_FLAT,
};

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

#ifdef CONFIG_OF
/*
 * Only the common platform data elements for s5m8767 are parsed here from the
 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
 * others have to parse their own platform data elements from device tree.
 *
 * The s5m8767 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 sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
					struct device *dev)
{
	struct sec_platform_data *pd;

	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	if (!pd) {
		dev_err(dev, "could not allocate memory for pdata\n");
		return ERR_PTR(-ENOMEM);
	}

	/*
	 * 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;
}
#else
static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
					struct device *dev)
{
	return NULL;
}
#endif

static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
						const struct i2c_device_id *id)
{
#ifdef CONFIG_OF
	if (i2c->dev.of_node) {
		const struct of_device_id *match;
		match = of_match_node(sec_dt_match, i2c->dev.of_node);
		return (int)match->data;
	}
#endif
	return (int)id->driver_data;
}

static int sec_pmic_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
	const struct regmap_config *regmap;
	struct sec_pmic_dev *sec_pmic;
	int ret;

	sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
				GFP_KERNEL);
	if (sec_pmic == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, sec_pmic);
	sec_pmic->dev = &i2c->dev;
	sec_pmic->i2c = i2c;
	sec_pmic->irq = i2c->irq;
	sec_pmic->type = sec_i2c_get_driver_data(i2c, id);

	if (sec_pmic->dev->of_node) {
		pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
		if (IS_ERR(pdata)) {
			ret = PTR_ERR(pdata);
			return ret;
		}
		pdata->device_type = sec_pmic->type;
	}
	if (pdata) {
		sec_pmic->device_type = pdata->device_type;
		sec_pmic->ono = pdata->ono;
		sec_pmic->irq_base = pdata->irq_base;
		sec_pmic->wakeup = pdata->wakeup;
		sec_pmic->pdata = pdata;
	}

	switch (sec_pmic->device_type) {
	case S2MPS11X:
		regmap = &s2mps11_regmap_config;
		break;
	case S5M8763X:
		regmap = &s5m8763_regmap_config;
		break;
	case S5M8767X:
		regmap = &s5m8767_regmap_config;
		break;
	default:
		regmap = &sec_regmap_config;
		break;
	}

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

	sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
	i2c_set_clientdata(sec_pmic->rtc, sec_pmic);

	sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc,
			&sec_rtc_regmap_config);
	if (IS_ERR(sec_pmic->regmap_rtc)) {
		ret = PTR_ERR(sec_pmic->regmap_rtc);
		dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
			ret);
		return ret;
	}

	if (pdata && pdata->cfg_pmic_irq)
		pdata->cfg_pmic_irq();

	sec_irq_init(sec_pmic);

	pm_runtime_set_active(sec_pmic->dev);

	switch (sec_pmic->device_type) {
	case S5M8751X:
		ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
				      ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
		break;
	case S5M8763X:
		ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
				      ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
		break;
	case S5M8767X:
		ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
				      ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
		break;
	case S2MPS11X:
		ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
				      ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
		break;
	default:
		/* If this happens the probe function is problem */
		BUG();
	}

	if (ret)
		goto err;

	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);

	return ret;

err:
	sec_irq_exit(sec_pmic);
	i2c_unregister_device(sec_pmic->rtc);
	return ret;
}

static int sec_pmic_remove(struct i2c_client *i2c)
{
	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);

	mfd_remove_devices(sec_pmic->dev);
	sec_irq_exit(sec_pmic);
	i2c_unregister_device(sec_pmic->rtc);
	return 0;
}

static int sec_pmic_suspend(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev)) {
		enable_irq_wake(sec_pmic->irq);
		/*
		 * PMIC IRQ must be disabled during suspend for RTC alarm
		 * to work properly.
		 * When device is woken up from suspend by RTC Alarm, an
		 * interrupt occurs before resuming I2C bus controller.
		 * The interrupt is handled by regmap_irq_thread which tries
		 * to read RTC registers. This read fails (I2C is still
		 * suspended) and RTC Alarm interrupt is disabled.
		 */
		disable_irq(sec_pmic->irq);
	}

	return 0;
}

static int sec_pmic_resume(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev)) {
		disable_irq_wake(sec_pmic->irq);
		enable_irq(sec_pmic->irq);
	}

	return 0;
}

static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);

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

static struct i2c_driver sec_pmic_driver = {
	.driver = {
		   .name = "sec_pmic",
		   .owner = THIS_MODULE,
		   .pm = &sec_pmic_pm_ops,
		   .of_match_table = of_match_ptr(sec_dt_match),
	},
	.probe = sec_pmic_probe,
	.remove = sec_pmic_remove,
	.id_table = sec_pmic_id,
};

static int __init sec_pmic_init(void)
{
	return i2c_add_driver(&sec_pmic_driver);
}

subsys_initcall(sec_pmic_init);

static void __exit sec_pmic_exit(void)
{
	i2c_del_driver(&sec_pmic_driver);
}
module_exit(sec_pmic_exit);

MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("Core support for the S5M MFD");
MODULE_LICENSE("GPL");
Commit	Line	Data
0f5f7078	1	/*
63063bfb	2	* sec-core.c
0f5f7078	3	*
63063bfb	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd
0f5f7078 SK	5	* http://www.samsung.com
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/err.h>
	18	#include <linux/slab.h>
	19	#include <linux/i2c.h>
1c5a099b	20	#include <linux/of.h>
26aec009	21	#include <linux/of_irq.h>
0f5f7078 SK	22	#include <linux/interrupt.h>
	23	#include <linux/pm_runtime.h>
	24	#include <linux/mutex.h>
	25	#include <linux/mfd/core.h>
54227bcf SK	26	#include <linux/mfd/samsung/core.h>
	27	#include <linux/mfd/samsung/irq.h>
	28	#include <linux/mfd/samsung/rtc.h>
25f311fa MB	29	#include <linux/mfd/samsung/s2mps11.h>
	30	#include <linux/mfd/samsung/s5m8763.h>
	31	#include <linux/mfd/samsung/s5m8767.h>
0f5f7078 SK	32	#include <linux/regmap.h>
0f5f7078 SK	33
5ac98553	34	static const struct mfd_cell s5m8751_devs[] = {
88a1cfd6 SK	35	{
	36	.name = "s5m8751-pmic",
	37	}, {
	38	.name = "s5m-charger",
	39	}, {
	40	.name = "s5m8751-codec",
	41	},
	42	};
	43
5ac98553	44	static const struct mfd_cell s5m8763_devs[] = {
88a1cfd6 SK	45	{
	46	.name = "s5m8763-pmic",
	47	}, {
	48	.name = "s5m-rtc",
	49	}, {
	50	.name = "s5m-charger",
	51	},
	52	};
	53
5ac98553	54	static const struct mfd_cell s5m8767_devs[] = {
0f5f7078 SK	55	{
	56	.name = "s5m8767-pmic",
	57	}, {
	58	.name = "s5m-rtc",
39fed00f TB	59	}, {
	60	.name = "s5m8767-clk",
	61	}
0f5f7078 SK	62	};
0f5f7078 SK	63
5ac98553	64	static const struct mfd_cell s2mps11_devs[] = {
9b6d1343 SK	65	{
9b6d1343 SK	66	.name = "s2mps11-pmic",
3134bcae YSB	67	}, {
	68	.name = "s2mps11-clk",
	69	}
9b6d1343 SK	70	};
9b6d1343 SK	71
26aec009 ADK	72	#ifdef CONFIG_OF
	73	static struct of_device_id sec_dt_match[] = {
	74	{ .compatible = "samsung,s5m8767-pmic",
	75	.data = (void *)S5M8767X,
	76	},
aa32acad YSB	77	{ .compatible = "samsung,s2mps11-pmic",
	78	.data = (void *)S2MPS11X,
	79	},
26aec009 ADK	80	{},
	81	};
	82	#endif
	83
6b845ba9 MB	84	static bool s2mps11_volatile(struct device *dev, unsigned int reg)
	85	{
	86	switch (reg) {
	87	case S2MPS11_REG_INT1M:
	88	case S2MPS11_REG_INT2M:
	89	case S2MPS11_REG_INT3M:
	90	return false;
	91	default:
	92	return true;
	93	}
	94	}
	95
	96	static bool s5m8763_volatile(struct device *dev, unsigned int reg)
	97	{
	98	switch (reg) {
	99	case S5M8763_REG_IRQM1:
	100	case S5M8763_REG_IRQM2:
	101	case S5M8763_REG_IRQM3:
	102	case S5M8763_REG_IRQM4:
	103	return false;
	104	default:
	105	return true;
	106	}
	107	}
	108
a30fffb0	109	static const struct regmap_config sec_regmap_config = {
0f5f7078 SK	110	.reg_bits = 8,
	111	.val_bits = 8,
	112	};
	113
a30fffb0	114	static const struct regmap_config s2mps11_regmap_config = {
25f311fa MB	115	.reg_bits = 8,
	116	.val_bits = 8,
	117
	118	.max_register = S2MPS11_REG_L38CTRL,
6b845ba9 MB	119	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	120	.cache_type = REGCACHE_FLAT,
25f311fa MB	121	};
25f311fa MB	122
a30fffb0	123	static const struct regmap_config s5m8763_regmap_config = {
25f311fa MB	124	.reg_bits = 8,
	125	.val_bits = 8,
	126
	127	.max_register = S5M8763_REG_LBCNFG2,
6b845ba9 MB	128	.volatile_reg = s5m8763_volatile,
6b845ba9 MB	129	.cache_type = REGCACHE_FLAT,
25f311fa MB	130	};
25f311fa MB	131
a30fffb0	132	static const struct regmap_config s5m8767_regmap_config = {
25f311fa MB	133	.reg_bits = 8,
	134	.val_bits = 8,
	135
	136	.max_register = S5M8767_REG_LDO28CTRL,
6b845ba9 MB	137	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	138	.cache_type = REGCACHE_FLAT,
25f311fa	139	};
26aec009	140
3e1e4a5f KK	141	static const struct regmap_config sec_rtc_regmap_config = {
	142	.reg_bits = 8,
	143	.val_bits = 8,
	144	};
	145
26aec009 ADK	146	#ifdef CONFIG_OF
	147	/*
	148	* Only the common platform data elements for s5m8767 are parsed here from the
	149	* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
	150	* others have to parse their own platform data elements from device tree.
	151	*
	152	* The s5m8767 platform data structure is instantiated here and the drivers for
	153	* the sub-modules need not instantiate another instance while parsing their
	154	* platform data.
	155	*/
	156	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
	157	struct device *dev)
	158	{
	159	struct sec_platform_data *pd;
	160
	161	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	162	if (!pd) {
	163	dev_err(dev, "could not allocate memory for pdata\n");
	164	return ERR_PTR(-ENOMEM);
	165	}
	166
	167	/*
	168	* ToDo: the 'wakeup' member in the platform data is more of a linux
	169	* specfic information. Hence, there is no binding for that yet and
	170	* not parsed here.
	171	*/
	172
	173	return pd;
	174	}
	175	#else
197bf856	176	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
26aec009 ADK	177	struct device *dev)
26aec009 ADK	178	{
005718c0	179	return NULL;
26aec009 ADK	180	}
	181	#endif
	182
	183	static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
	184	const struct i2c_device_id *id)
	185	{
	186	#ifdef CONFIG_OF
	187	if (i2c->dev.of_node) {
	188	const struct of_device_id *match;
	189	match = of_match_node(sec_dt_match, i2c->dev.of_node);
	190	return (int)match->data;
	191	}
	192	#endif
	193	return (int)id->driver_data;
	194	}
	195
63063bfb	196	static int sec_pmic_probe(struct i2c_client *i2c,
0f5f7078 SK	197	const struct i2c_device_id *id)
0f5f7078 SK	198	{
334a41ce	199	struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
25f311fa	200	const struct regmap_config *regmap;
63063bfb	201	struct sec_pmic_dev *sec_pmic;
61a2af30	202	int ret;
0f5f7078	203
63063bfb	204	sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
621210e2	205	GFP_KERNEL);
63063bfb	206	if (sec_pmic == NULL)
0f5f7078 SK	207	return -ENOMEM;
0f5f7078 SK	208
63063bfb SK	209	i2c_set_clientdata(i2c, sec_pmic);
	210	sec_pmic->dev = &i2c->dev;
	211	sec_pmic->i2c = i2c;
	212	sec_pmic->irq = i2c->irq;
26aec009 ADK	213	sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
	214
	215	if (sec_pmic->dev->of_node) {
	216	pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
	217	if (IS_ERR(pdata)) {
	218	ret = PTR_ERR(pdata);
	219	return ret;
	220	}
	221	pdata->device_type = sec_pmic->type;
	222	}
0f5f7078	223	if (pdata) {
63063bfb SK	224	sec_pmic->device_type = pdata->device_type;
	225	sec_pmic->ono = pdata->ono;
	226	sec_pmic->irq_base = pdata->irq_base;
	227	sec_pmic->wakeup = pdata->wakeup;
26aec009	228	sec_pmic->pdata = pdata;
0f5f7078 SK	229	}
0f5f7078 SK	230
25f311fa MB	231	switch (sec_pmic->device_type) {
	232	case S2MPS11X:
	233	regmap = &s2mps11_regmap_config;
	234	break;
	235	case S5M8763X:
	236	regmap = &s5m8763_regmap_config;
	237	break;
	238	case S5M8767X:
	239	regmap = &s5m8767_regmap_config;
	240	break;
	241	default:
	242	regmap = &sec_regmap_config;
	243	break;
	244	}
	245
3e1e4a5f KK	246	sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
	247	if (IS_ERR(sec_pmic->regmap_pmic)) {
	248	ret = PTR_ERR(sec_pmic->regmap_pmic);
0f5f7078	249	dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
61a2af30	250	ret);
1092e1c7	251	return ret;
0f5f7078 SK	252	}
0f5f7078 SK	253
63063bfb SK	254	sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
63063bfb SK	255	i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
0f5f7078	256
3e1e4a5f KK	257	sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc,
	258	&sec_rtc_regmap_config);
	259	if (IS_ERR(sec_pmic->regmap_rtc)) {
	260	ret = PTR_ERR(sec_pmic->regmap_rtc);
	261	dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
	262	ret);
	263	return ret;
	264	}
	265
c3ebb30a	266	if (pdata && pdata->cfg_pmic_irq)
0f5f7078 SK	267	pdata->cfg_pmic_irq();
0f5f7078 SK	268
63063bfb	269	sec_irq_init(sec_pmic);
0f5f7078	270
63063bfb	271	pm_runtime_set_active(sec_pmic->dev);
0f5f7078	272
63063bfb	273	switch (sec_pmic->device_type) {
88a1cfd6	274	case S5M8751X:
63063bfb	275	ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
0848c94f	276	ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
88a1cfd6 SK	277	break;
88a1cfd6 SK	278	case S5M8763X:
63063bfb	279	ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
0848c94f	280	ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
88a1cfd6 SK	281	break;
88a1cfd6 SK	282	case S5M8767X:
63063bfb	283	ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
0848c94f	284	ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
88a1cfd6	285	break;
9b6d1343 SK	286	case S2MPS11X:
9b6d1343 SK	287	ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
0848c94f	288	ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
9b6d1343	289	break;
88a1cfd6 SK	290	default:
	291	/* If this happens the probe function is problem */
	292	BUG();
	293	}
0f5f7078	294
15447a46	295	if (ret)
0f5f7078 SK	296	goto err;
0f5f7078 SK	297
f6d6daaf KK	298	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
f6d6daaf KK	299
0f5f7078 SK	300	return ret;
	301
	302	err:
63063bfb SK	303	sec_irq_exit(sec_pmic);
63063bfb SK	304	i2c_unregister_device(sec_pmic->rtc);
0f5f7078 SK	305	return ret;
	306	}
	307
63063bfb	308	static int sec_pmic_remove(struct i2c_client *i2c)
0f5f7078	309	{
63063bfb	310	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
0f5f7078	311
63063bfb SK	312	mfd_remove_devices(sec_pmic->dev);
	313	sec_irq_exit(sec_pmic);
	314	i2c_unregister_device(sec_pmic->rtc);
0f5f7078 SK	315	return 0;
	316	}
	317
f6d6daaf KK	318	static int sec_pmic_suspend(struct device *dev)
	319	{
	320	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	321	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	322
	323	if (device_may_wakeup(dev)) {
	324	enable_irq_wake(sec_pmic->irq);
	325	/*
	326	* PMIC IRQ must be disabled during suspend for RTC alarm
	327	* to work properly.
	328	* When device is woken up from suspend by RTC Alarm, an
	329	* interrupt occurs before resuming I2C bus controller.
	330	* The interrupt is handled by regmap_irq_thread which tries
	331	* to read RTC registers. This read fails (I2C is still
	332	* suspended) and RTC Alarm interrupt is disabled.
	333	*/
	334	disable_irq(sec_pmic->irq);
	335	}
	336
	337	return 0;
	338	}
	339
	340	static int sec_pmic_resume(struct device *dev)
	341	{
	342	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	343	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	344
	345	if (device_may_wakeup(dev)) {
	346	disable_irq_wake(sec_pmic->irq);
	347	enable_irq(sec_pmic->irq);
	348	}
	349
	350	return 0;
	351	}
	352
	353	static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
	354
63063bfb SK	355	static const struct i2c_device_id sec_pmic_id[] = {
63063bfb SK	356	{ "sec_pmic", 0 },
0f5f7078 SK	357	{ }
0f5f7078 SK	358	};
63063bfb	359	MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
0f5f7078	360
63063bfb	361	static struct i2c_driver sec_pmic_driver = {
0f5f7078	362	.driver = {
63063bfb	363	.name = "sec_pmic",
0f5f7078	364	.owner = THIS_MODULE,
f6d6daaf	365	.pm = &sec_pmic_pm_ops,
26aec009	366	.of_match_table = of_match_ptr(sec_dt_match),
0f5f7078	367	},
63063bfb SK	368	.probe = sec_pmic_probe,
	369	.remove = sec_pmic_remove,
	370	.id_table = sec_pmic_id,
0f5f7078 SK	371	};
0f5f7078 SK	372
63063bfb	373	static int __init sec_pmic_init(void)
0f5f7078	374	{
63063bfb	375	return i2c_add_driver(&sec_pmic_driver);
0f5f7078 SK	376	}
0f5f7078 SK	377
63063bfb	378	subsys_initcall(sec_pmic_init);
0f5f7078	379
63063bfb	380	static void __exit sec_pmic_exit(void)
0f5f7078	381	{
63063bfb	382	i2c_del_driver(&sec_pmic_driver);
0f5f7078	383	}
63063bfb	384	module_exit(sec_pmic_exit);
0f5f7078 SK	385
	386	MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
	387	MODULE_DESCRIPTION("Core support for the S5M MFD");
	388	MODULE_LICENSE("GPL");