[mirror_ubuntu-zesty-kernel.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/s2mpa01.h>
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s2mps14.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",
		.of_compatible = "samsung,s5m8767-clk",
	}
};

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

static const struct mfd_cell s2mps14_devs[] = {
	{
		.name = "s2mps14-pmic",
	}, {
		.name = "s2mps14-rtc",
	}, {
		.name = "s2mps14-clk",
		.of_compatible = "samsung,s2mps14-clk",
	}
};

static const struct mfd_cell s2mpa01_devs[] = {
	{
		.name = "s2mpa01-pmic",
	},
};

#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,
	}, {
		.compatible = "samsung,s2mps14-pmic",
		.data = (void *)S2MPS14X,
	}, {
		.compatible = "samsung,s2mpa01-pmic",
		.data = (void *)S2MPA01,
	}, {
		/* Sentinel */
	},
};
#endif

static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case S2MPA01_REG_INT1M:
	case S2MPA01_REG_INT2M:
	case S2MPA01_REG_INT3M:
		return false;
	default:
		return true;
	}
}

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 s2mpa01_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPA01_REG_LDO_OVCB4,
	.volatile_reg = s2mpa01_volatile,
	.cache_type = REGCACHE_FLAT,
};

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 s2mps14_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPS14_REG_LDODSCH3,
	.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 s5m_rtc_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = SEC_RTC_REG_MAX,
};

static const struct regmap_config s2mps14_rtc_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPS_RTC_REG_MAX,
};

#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 unsigned long 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 (unsigned long)match->data;
	}
#endif
	return 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, *regmap_rtc;
	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 S2MPA01:
		regmap = &s2mpa01_regmap_config;
		break;
	case S2MPS11X:
		regmap = &s2mps11_regmap_config;
		/*
		 * The rtc-s5m driver does not support S2MPS11 and there
		 * is no mfd_cell for S2MPS11 RTC device.
		 * However we must pass something to devm_regmap_init_i2c()
		 * so use S5M-like regmap config even though it wouldn't work.
		 */
		regmap_rtc = &s5m_rtc_regmap_config;
		break;
	case S2MPS14X:
		regmap = &s2mps14_regmap_config;
		regmap_rtc = &s2mps14_rtc_regmap_config;
		break;
	case S5M8763X:
		regmap = &s5m8763_regmap_config;
		regmap_rtc = &s5m_rtc_regmap_config;
		break;
	case S5M8767X:
		regmap = &s5m8767_regmap_config;
		regmap_rtc = &s5m_rtc_regmap_config;
		break;
	default:
		regmap = &sec_regmap_config;
		regmap_rtc = &s5m_rtc_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);
	if (!sec_pmic->rtc) {
		dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n");
		return -ENODEV;
	}
	i2c_set_clientdata(sec_pmic->rtc, sec_pmic);

	sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc);
	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);
		goto err_regmap_rtc;
	}

	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 S2MPA01:
		ret = mfd_add_devices(sec_pmic->dev, -1, s2mpa01_devs,
				      ARRAY_SIZE(s2mpa01_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;
	case S2MPS14X:
		ret = mfd_add_devices(sec_pmic->dev, -1, s2mps14_devs,
				      ARRAY_SIZE(s2mps14_devs), NULL, 0, NULL);
		break;
	default:
		/* If this happens the probe function is problem */
		BUG();
	}

	if (ret)
		goto err_mfd;

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

	return ret;

err_mfd:
	sec_irq_exit(sec_pmic);
err_regmap_rtc:
	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;
}

#ifdef CONFIG_PM_SLEEP
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;
}
#endif /* CONFIG_PM_SLEEP */

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>
ce24991e	29	#include <linux/mfd/samsung/s2mpa01.h>
25f311fa	30	#include <linux/mfd/samsung/s2mps11.h>
dc691966	31	#include <linux/mfd/samsung/s2mps14.h>
25f311fa MB	32	#include <linux/mfd/samsung/s5m8763.h>
25f311fa MB	33	#include <linux/mfd/samsung/s5m8767.h>
0f5f7078 SK	34	#include <linux/regmap.h>
0f5f7078 SK	35
5ac98553	36	static const struct mfd_cell s5m8751_devs[] = {
88a1cfd6 SK	37	{
	38	.name = "s5m8751-pmic",
	39	}, {
	40	.name = "s5m-charger",
	41	}, {
	42	.name = "s5m8751-codec",
	43	},
	44	};
	45
5ac98553	46	static const struct mfd_cell s5m8763_devs[] = {
88a1cfd6 SK	47	{
	48	.name = "s5m8763-pmic",
	49	}, {
	50	.name = "s5m-rtc",
	51	}, {
	52	.name = "s5m-charger",
	53	},
	54	};
	55
5ac98553	56	static const struct mfd_cell s5m8767_devs[] = {
0f5f7078 SK	57	{
	58	.name = "s5m8767-pmic",
	59	}, {
	60	.name = "s5m-rtc",
39fed00f TB	61	}, {
39fed00f TB	62	.name = "s5m8767-clk",
53c31b34	63	.of_compatible = "samsung,s5m8767-clk",
39fed00f	64	}
0f5f7078 SK	65	};
0f5f7078 SK	66
5ac98553	67	static const struct mfd_cell s2mps11_devs[] = {
9b6d1343 SK	68	{
9b6d1343 SK	69	.name = "s2mps11-pmic",
3134bcae YSB	70	}, {
3134bcae YSB	71	.name = "s2mps11-clk",
53c31b34	72	.of_compatible = "samsung,s2mps11-clk",
3134bcae	73	}
9b6d1343 SK	74	};
9b6d1343 SK	75
dc691966 KK	76	static const struct mfd_cell s2mps14_devs[] = {
	77	{
	78	.name = "s2mps14-pmic",
	79	}, {
	80	.name = "s2mps14-rtc",
	81	}, {
	82	.name = "s2mps14-clk",
53c31b34	83	.of_compatible = "samsung,s2mps14-clk",
dc691966 KK	84	}
	85	};
	86
ce24991e SK	87	static const struct mfd_cell s2mpa01_devs[] = {
	88	{
	89	.name = "s2mpa01-pmic",
	90	},
	91	};
	92
26aec009 ADK	93	#ifdef CONFIG_OF
	94	static struct of_device_id sec_dt_match[] = {
	95	{ .compatible = "samsung,s5m8767-pmic",
	96	.data = (void *)S5M8767X,
ce24991e SK	97	}, {
ce24991e SK	98	.compatible = "samsung,s2mps11-pmic",
aa32acad	99	.data = (void *)S2MPS11X,
ce24991e SK	100	}, {
ce24991e SK	101	.compatible = "samsung,s2mps14-pmic",
dc691966	102	.data = (void *)S2MPS14X,
ce24991e SK	103	}, {
	104	.compatible = "samsung,s2mpa01-pmic",
	105	.data = (void *)S2MPA01,
	106	}, {
	107	/* Sentinel */
dc691966	108	},
26aec009 ADK	109	};
	110	#endif
	111
ce24991e SK	112	static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
	113	{
	114	switch (reg) {
	115	case S2MPA01_REG_INT1M:
	116	case S2MPA01_REG_INT2M:
	117	case S2MPA01_REG_INT3M:
	118	return false;
	119	default:
	120	return true;
	121	}
	122	}
	123
6b845ba9 MB	124	static bool s2mps11_volatile(struct device *dev, unsigned int reg)
	125	{
	126	switch (reg) {
	127	case S2MPS11_REG_INT1M:
	128	case S2MPS11_REG_INT2M:
	129	case S2MPS11_REG_INT3M:
	130	return false;
	131	default:
	132	return true;
	133	}
	134	}
	135
	136	static bool s5m8763_volatile(struct device *dev, unsigned int reg)
	137	{
	138	switch (reg) {
	139	case S5M8763_REG_IRQM1:
	140	case S5M8763_REG_IRQM2:
	141	case S5M8763_REG_IRQM3:
	142	case S5M8763_REG_IRQM4:
	143	return false;
	144	default:
	145	return true;
	146	}
	147	}
	148
a30fffb0	149	static const struct regmap_config sec_regmap_config = {
0f5f7078 SK	150	.reg_bits = 8,
	151	.val_bits = 8,
	152	};
	153
ce24991e SK	154	static const struct regmap_config s2mpa01_regmap_config = {
	155	.reg_bits = 8,
	156	.val_bits = 8,
	157
	158	.max_register = S2MPA01_REG_LDO_OVCB4,
	159	.volatile_reg = s2mpa01_volatile,
	160	.cache_type = REGCACHE_FLAT,
	161	};
	162
a30fffb0	163	static const struct regmap_config s2mps11_regmap_config = {
25f311fa MB	164	.reg_bits = 8,
	165	.val_bits = 8,
	166
	167	.max_register = S2MPS11_REG_L38CTRL,
6b845ba9 MB	168	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	169	.cache_type = REGCACHE_FLAT,
25f311fa MB	170	};
25f311fa MB	171
dc691966 KK	172	static const struct regmap_config s2mps14_regmap_config = {
	173	.reg_bits = 8,
	174	.val_bits = 8,
	175
	176	.max_register = S2MPS14_REG_LDODSCH3,
	177	.volatile_reg = s2mps11_volatile,
	178	.cache_type = REGCACHE_FLAT,
	179	};
	180
a30fffb0	181	static const struct regmap_config s5m8763_regmap_config = {
25f311fa MB	182	.reg_bits = 8,
	183	.val_bits = 8,
	184
	185	.max_register = S5M8763_REG_LBCNFG2,
6b845ba9 MB	186	.volatile_reg = s5m8763_volatile,
6b845ba9 MB	187	.cache_type = REGCACHE_FLAT,
25f311fa MB	188	};
25f311fa MB	189
a30fffb0	190	static const struct regmap_config s5m8767_regmap_config = {
25f311fa MB	191	.reg_bits = 8,
	192	.val_bits = 8,
	193
	194	.max_register = S5M8767_REG_LDO28CTRL,
6b845ba9 MB	195	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	196	.cache_type = REGCACHE_FLAT,
25f311fa	197	};
26aec009	198
dc691966	199	static const struct regmap_config s5m_rtc_regmap_config = {
3e1e4a5f KK	200	.reg_bits = 8,
3e1e4a5f KK	201	.val_bits = 8,
b07e2b70 KK	202
b07e2b70 KK	203	.max_register = SEC_RTC_REG_MAX,
3e1e4a5f KK	204	};
3e1e4a5f KK	205
dc691966 KK	206	static const struct regmap_config s2mps14_rtc_regmap_config = {
	207	.reg_bits = 8,
	208	.val_bits = 8,
	209
	210	.max_register = S2MPS_RTC_REG_MAX,
	211	};
	212
26aec009 ADK	213	#ifdef CONFIG_OF
	214	/*
	215	* Only the common platform data elements for s5m8767 are parsed here from the
	216	* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
	217	* others have to parse their own platform data elements from device tree.
	218	*
	219	* The s5m8767 platform data structure is instantiated here and the drivers for
	220	* the sub-modules need not instantiate another instance while parsing their
	221	* platform data.
	222	*/
	223	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
	224	struct device *dev)
	225	{
	226	struct sec_platform_data *pd;
	227
	228	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
	229	if (!pd) {
	230	dev_err(dev, "could not allocate memory for pdata\n");
	231	return ERR_PTR(-ENOMEM);
	232	}
	233
	234	/*
	235	* ToDo: the 'wakeup' member in the platform data is more of a linux
	236	* specfic information. Hence, there is no binding for that yet and
	237	* not parsed here.
	238	*/
	239
	240	return pd;
	241	}
	242	#else
197bf856	243	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
26aec009 ADK	244	struct device *dev)
26aec009 ADK	245	{
005718c0	246	return NULL;
26aec009 ADK	247	}
	248	#endif
	249
8f695de5	250	static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
26aec009 ADK	251	const struct i2c_device_id *id)
	252	{
	253	#ifdef CONFIG_OF
	254	if (i2c->dev.of_node) {
	255	const struct of_device_id *match;
	256	match = of_match_node(sec_dt_match, i2c->dev.of_node);
8f695de5	257	return (unsigned long)match->data;
26aec009 ADK	258	}
26aec009 ADK	259	#endif
8f695de5	260	return id->driver_data;
26aec009 ADK	261	}
26aec009 ADK	262
63063bfb	263	static int sec_pmic_probe(struct i2c_client *i2c,
0f5f7078 SK	264	const struct i2c_device_id *id)
0f5f7078 SK	265	{
334a41ce	266	struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
3e5a45f7	267	const struct regmap_config regmap, regmap_rtc;
63063bfb	268	struct sec_pmic_dev *sec_pmic;
61a2af30	269	int ret;
0f5f7078	270
63063bfb	271	sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
621210e2	272	GFP_KERNEL);
63063bfb	273	if (sec_pmic == NULL)
0f5f7078 SK	274	return -ENOMEM;
0f5f7078 SK	275
63063bfb SK	276	i2c_set_clientdata(i2c, sec_pmic);
	277	sec_pmic->dev = &i2c->dev;
	278	sec_pmic->i2c = i2c;
	279	sec_pmic->irq = i2c->irq;
26aec009 ADK	280	sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
	281
	282	if (sec_pmic->dev->of_node) {
	283	pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
	284	if (IS_ERR(pdata)) {
	285	ret = PTR_ERR(pdata);
	286	return ret;
	287	}
	288	pdata->device_type = sec_pmic->type;
	289	}
0f5f7078	290	if (pdata) {
63063bfb SK	291	sec_pmic->device_type = pdata->device_type;
	292	sec_pmic->ono = pdata->ono;
	293	sec_pmic->irq_base = pdata->irq_base;
	294	sec_pmic->wakeup = pdata->wakeup;
26aec009	295	sec_pmic->pdata = pdata;
0f5f7078 SK	296	}
0f5f7078 SK	297
25f311fa	298	switch (sec_pmic->device_type) {
ce24991e SK	299	case S2MPA01:
	300	regmap = &s2mpa01_regmap_config;
	301	break;
25f311fa MB	302	case S2MPS11X:
25f311fa MB	303	regmap = &s2mps11_regmap_config;
3e5a45f7 KK	304	/*
	305	* The rtc-s5m driver does not support S2MPS11 and there
	306	* is no mfd_cell for S2MPS11 RTC device.
	307	* However we must pass something to devm_regmap_init_i2c()
	308	* so use S5M-like regmap config even though it wouldn't work.
	309	*/
dc691966 KK	310	regmap_rtc = &s5m_rtc_regmap_config;
	311	break;
	312	case S2MPS14X:
	313	regmap = &s2mps14_regmap_config;
	314	regmap_rtc = &s2mps14_rtc_regmap_config;
25f311fa MB	315	break;
	316	case S5M8763X:
	317	regmap = &s5m8763_regmap_config;
dc691966	318	regmap_rtc = &s5m_rtc_regmap_config;
25f311fa MB	319	break;
	320	case S5M8767X:
	321	regmap = &s5m8767_regmap_config;
dc691966	322	regmap_rtc = &s5m_rtc_regmap_config;
25f311fa MB	323	break;
	324	default:
	325	regmap = &sec_regmap_config;
dc691966	326	regmap_rtc = &s5m_rtc_regmap_config;
25f311fa MB	327	break;
	328	}
	329
3e1e4a5f KK	330	sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
	331	if (IS_ERR(sec_pmic->regmap_pmic)) {
	332	ret = PTR_ERR(sec_pmic->regmap_pmic);
0f5f7078	333	dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
61a2af30	334	ret);
1092e1c7	335	return ret;
0f5f7078 SK	336	}
0f5f7078 SK	337
63063bfb	338	sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
65aba1e0 KK	339	if (!sec_pmic->rtc) {
	340	dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n");
	341	return -ENODEV;
	342	}
63063bfb	343	i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
0f5f7078	344
3e5a45f7	345	sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc);
3e1e4a5f KK	346	if (IS_ERR(sec_pmic->regmap_rtc)) {
	347	ret = PTR_ERR(sec_pmic->regmap_rtc);
	348	dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
	349	ret);
8c66eece	350	goto err_regmap_rtc;
3e1e4a5f KK	351	}
3e1e4a5f KK	352
c3ebb30a	353	if (pdata && pdata->cfg_pmic_irq)
0f5f7078 SK	354	pdata->cfg_pmic_irq();
0f5f7078 SK	355
63063bfb	356	sec_irq_init(sec_pmic);
0f5f7078	357
63063bfb	358	pm_runtime_set_active(sec_pmic->dev);
0f5f7078	359
63063bfb	360	switch (sec_pmic->device_type) {
88a1cfd6	361	case S5M8751X:
63063bfb	362	ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
0848c94f	363	ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
88a1cfd6 SK	364	break;
88a1cfd6 SK	365	case S5M8763X:
63063bfb	366	ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
0848c94f	367	ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
88a1cfd6 SK	368	break;
88a1cfd6 SK	369	case S5M8767X:
63063bfb	370	ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
0848c94f	371	ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
88a1cfd6	372	break;
ce24991e SK	373	case S2MPA01:
	374	ret = mfd_add_devices(sec_pmic->dev, -1, s2mpa01_devs,
	375	ARRAY_SIZE(s2mpa01_devs), NULL, 0, NULL);
	376	break;
9b6d1343 SK	377	case S2MPS11X:
9b6d1343 SK	378	ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
0848c94f	379	ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
9b6d1343	380	break;
dc691966 KK	381	case S2MPS14X:
	382	ret = mfd_add_devices(sec_pmic->dev, -1, s2mps14_devs,
	383	ARRAY_SIZE(s2mps14_devs), NULL, 0, NULL);
	384	break;
88a1cfd6 SK	385	default:
	386	/* If this happens the probe function is problem */
	387	BUG();
	388	}
0f5f7078	389
15447a46	390	if (ret)
8c66eece	391	goto err_mfd;
0f5f7078	392
f6d6daaf KK	393	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
f6d6daaf KK	394
0f5f7078 SK	395	return ret;
0f5f7078 SK	396
8c66eece	397	err_mfd:
63063bfb	398	sec_irq_exit(sec_pmic);
8c66eece	399	err_regmap_rtc:
63063bfb	400	i2c_unregister_device(sec_pmic->rtc);
0f5f7078 SK	401	return ret;
	402	}
	403
63063bfb	404	static int sec_pmic_remove(struct i2c_client *i2c)
0f5f7078	405	{
63063bfb	406	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
0f5f7078	407
63063bfb SK	408	mfd_remove_devices(sec_pmic->dev);
	409	sec_irq_exit(sec_pmic);
	410	i2c_unregister_device(sec_pmic->rtc);
0f5f7078 SK	411	return 0;
	412	}
	413
8321bbf8	414	#ifdef CONFIG_PM_SLEEP
f6d6daaf KK	415	static int sec_pmic_suspend(struct device *dev)
	416	{
	417	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	418	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	419
	420	if (device_may_wakeup(dev)) {
	421	enable_irq_wake(sec_pmic->irq);
	422	/*
	423	* PMIC IRQ must be disabled during suspend for RTC alarm
	424	* to work properly.
	425	* When device is woken up from suspend by RTC Alarm, an
	426	* interrupt occurs before resuming I2C bus controller.
	427	* The interrupt is handled by regmap_irq_thread which tries
	428	* to read RTC registers. This read fails (I2C is still
	429	* suspended) and RTC Alarm interrupt is disabled.
	430	*/
	431	disable_irq(sec_pmic->irq);
	432	}
	433
	434	return 0;
	435	}
	436
	437	static int sec_pmic_resume(struct device *dev)
	438	{
	439	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	440	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	441
	442	if (device_may_wakeup(dev)) {
	443	disable_irq_wake(sec_pmic->irq);
	444	enable_irq(sec_pmic->irq);
	445	}
	446
	447	return 0;
	448	}
8321bbf8	449	#endif /* CONFIG_PM_SLEEP */
f6d6daaf KK	450
	451	static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
	452
63063bfb SK	453	static const struct i2c_device_id sec_pmic_id[] = {
63063bfb SK	454	{ "sec_pmic", 0 },
0f5f7078 SK	455	{ }
0f5f7078 SK	456	};
63063bfb	457	MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
0f5f7078	458
63063bfb	459	static struct i2c_driver sec_pmic_driver = {
0f5f7078	460	.driver = {
63063bfb	461	.name = "sec_pmic",
0f5f7078	462	.owner = THIS_MODULE,
f6d6daaf	463	.pm = &sec_pmic_pm_ops,
26aec009	464	.of_match_table = of_match_ptr(sec_dt_match),
0f5f7078	465	},
63063bfb SK	466	.probe = sec_pmic_probe,
	467	.remove = sec_pmic_remove,
	468	.id_table = sec_pmic_id,
0f5f7078 SK	469	};
0f5f7078 SK	470
63063bfb	471	static int __init sec_pmic_init(void)
0f5f7078	472	{
63063bfb	473	return i2c_add_driver(&sec_pmic_driver);
0f5f7078 SK	474	}
0f5f7078 SK	475
63063bfb	476	subsys_initcall(sec_pmic_init);
0f5f7078	477
63063bfb	478	static void __exit sec_pmic_exit(void)
0f5f7078	479	{
63063bfb	480	i2c_del_driver(&sec_pmic_driver);
0f5f7078	481	}
63063bfb	482	module_exit(sec_pmic_exit);
0f5f7078 SK	483
	484	MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
	485	MODULE_DESCRIPTION("Core support for the S5M MFD");
	486	MODULE_LICENSE("GPL");