[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/s2mpa01.h>
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s2mps13.h>
#include <linux/mfd/samsung/s2mps14.h>
#include <linux/mfd/samsung/s2mpu02.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 = "s2mps14-rtc",
	}, {
		.name = "s2mps11-clk",
		.of_compatible = "samsung,s2mps11-clk",
	}
};

static const struct mfd_cell s2mps13_devs[] = {
	{ .name = "s2mps13-pmic", },
	{ .name = "s2mps13-rtc", },
	{
		.name = "s2mps13-clk",
		.of_compatible = "samsung,s2mps13-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",
	},
};

static const struct mfd_cell s2mpu02_devs[] = {
	{ .name = "s2mpu02-pmic", },
	{ .name = "s2mpu02-rtc", },
	{
		.name = "s2mpu02-clk",
		.of_compatible = "samsung,s2mpu02-clk",
	}
};

#ifdef CONFIG_OF
static const struct of_device_id sec_dt_match[] = {
	{	.compatible = "samsung,s5m8767-pmic",
		.data = (void *)S5M8767X,
	}, {
		.compatible = "samsung,s2mps11-pmic",
		.data = (void *)S2MPS11X,
	}, {
		.compatible = "samsung,s2mps13-pmic",
		.data = (void *)S2MPS13X,
	}, {
		.compatible = "samsung,s2mps14-pmic",
		.data = (void *)S2MPS14X,
	}, {
		.compatible = "samsung,s2mpa01-pmic",
		.data = (void *)S2MPA01,
	}, {
		.compatible = "samsung,s2mpu02-pmic",
		.data = (void *)S2MPU02,
	}, {
		/* 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 s2mpu02_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case S2MPU02_REG_INT1M:
	case S2MPU02_REG_INT2M:
	case S2MPU02_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 s2mps13_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPS13_REG_LDODSCH5,
	.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 s2mpu02_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPU02_REG_DVSDATA,
	.volatile_reg = s2mpu02_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 void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
{
	unsigned int val;

	/* For each device type, the REG_ID is always the first register */
	if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
		dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
}

static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
{
	int err;

	if (sec_pmic->device_type != S2MPS13X)
		return;

	if (sec_pmic->pdata->disable_wrstbi) {
		/*
		 * If WRSTBI pin is pulled down this feature must be disabled
		 * because each Suspend to RAM will trigger buck voltage reset
		 * to default values.
		 */
		err = regmap_update_bits(sec_pmic->regmap_pmic,
					 S2MPS13_REG_WRSTBI,
					 S2MPS13_REG_WRSTBI_MASK, 0x0);
		if (err)
			dev_warn(sec_pmic->dev,
				 "Cannot initialize WRSTBI config: %d\n",
				 err);
	}
}

#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)
		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.
	 */

	pd->manual_poweroff = of_property_read_bool(dev->of_node,
						"samsung,s2mps11-acokb-ground");
	pd->disable_wrstbi = of_property_read_bool(dev->of_node,
						"samsung,s2mps11-wrstbi-ground");
	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;
	const struct mfd_cell *sec_devs;
	struct sec_pmic_dev *sec_pmic;
	unsigned long device_type;
	int ret, num_sec_devs;

	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;
	device_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 = device_type;
	}
	if (pdata) {
		sec_pmic->device_type = pdata->device_type;
		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;
		break;
	case S2MPS13X:
		regmap = &s2mps13_regmap_config;
		break;
	case S2MPS14X:
		regmap = &s2mps14_regmap_config;
		break;
	case S5M8763X:
		regmap = &s5m8763_regmap_config;
		break;
	case S5M8767X:
		regmap = &s5m8767_regmap_config;
		break;
	case S2MPU02:
		regmap = &s2mpu02_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;
	}

	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:
		sec_devs = s5m8751_devs;
		num_sec_devs = ARRAY_SIZE(s5m8751_devs);
		break;
	case S5M8763X:
		sec_devs = s5m8763_devs;
		num_sec_devs = ARRAY_SIZE(s5m8763_devs);
		break;
	case S5M8767X:
		sec_devs = s5m8767_devs;
		num_sec_devs = ARRAY_SIZE(s5m8767_devs);
		break;
	case S2MPA01:
		sec_devs = s2mpa01_devs;
		num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
		break;
	case S2MPS11X:
		sec_devs = s2mps11_devs;
		num_sec_devs = ARRAY_SIZE(s2mps11_devs);
		break;
	case S2MPS13X:
		sec_devs = s2mps13_devs;
		num_sec_devs = ARRAY_SIZE(s2mps13_devs);
		break;
	case S2MPS14X:
		sec_devs = s2mps14_devs;
		num_sec_devs = ARRAY_SIZE(s2mps14_devs);
		break;
	case S2MPU02:
		sec_devs = s2mpu02_devs;
		num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
		break;
	default:
		/* If this happens the probe function is problem */
		BUG();
	}
	ret = mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, NULL,
			      0, NULL);
	if (ret)
		goto err_mfd;

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

	return ret;

err_mfd:
	sec_irq_exit(sec_pmic);
	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);
	return 0;
}

static void sec_pmic_shutdown(struct i2c_client *i2c)
{
	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	unsigned int reg, mask;

	if (!sec_pmic->pdata->manual_poweroff)
		return;

	switch (sec_pmic->device_type) {
	case S2MPS11X:
		reg = S2MPS11_REG_CTRL1;
		mask = S2MPS11_CTRL1_PWRHOLD_MASK;
		break;
	default:
		/*
		 * Currently only one board with S2MPS11 needs this, so just
		 * ignore the rest.
		 */
		dev_warn(sec_pmic->dev,
			"Unsupported device %lu for manual power off\n",
			sec_pmic->device_type);
		return;
	}

	regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 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, 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",
		   .pm = &sec_pmic_pm_ops,
		   .of_match_table = of_match_ptr(sec_dt_match),
	},
	.probe = sec_pmic_probe,
	.remove = sec_pmic_remove,
	.shutdown = sec_pmic_shutdown,
	.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>
54227bcf SK	27	#include <linux/mfd/samsung/irq.h>
ce24991e	28	#include <linux/mfd/samsung/s2mpa01.h>
25f311fa	29	#include <linux/mfd/samsung/s2mps11.h>
76b9840b	30	#include <linux/mfd/samsung/s2mps13.h>
dc691966	31	#include <linux/mfd/samsung/s2mps14.h>
00e2573d	32	#include <linux/mfd/samsung/s2mpu02.h>
25f311fa MB	33	#include <linux/mfd/samsung/s5m8763.h>
25f311fa MB	34	#include <linux/mfd/samsung/s5m8767.h>
0f5f7078 SK	35	#include <linux/regmap.h>
0f5f7078 SK	36
5ac98553	37	static const struct mfd_cell s5m8751_devs[] = {
88a1cfd6 SK	38	{
	39	.name = "s5m8751-pmic",
	40	}, {
	41	.name = "s5m-charger",
	42	}, {
	43	.name = "s5m8751-codec",
	44	},
	45	};
	46
5ac98553	47	static const struct mfd_cell s5m8763_devs[] = {
88a1cfd6 SK	48	{
	49	.name = "s5m8763-pmic",
	50	}, {
	51	.name = "s5m-rtc",
	52	}, {
	53	.name = "s5m-charger",
	54	},
	55	};
	56
5ac98553	57	static const struct mfd_cell s5m8767_devs[] = {
0f5f7078 SK	58	{
	59	.name = "s5m8767-pmic",
	60	}, {
	61	.name = "s5m-rtc",
39fed00f TB	62	}, {
39fed00f TB	63	.name = "s5m8767-clk",
53c31b34	64	.of_compatible = "samsung,s5m8767-clk",
39fed00f	65	}
0f5f7078 SK	66	};
0f5f7078 SK	67
5ac98553	68	static const struct mfd_cell s2mps11_devs[] = {
9b6d1343 SK	69	{
9b6d1343 SK	70	.name = "s2mps11-pmic",
eea2e596 KK	71	}, {
eea2e596 KK	72	.name = "s2mps14-rtc",
3134bcae YSB	73	}, {
3134bcae YSB	74	.name = "s2mps11-clk",
53c31b34	75	.of_compatible = "samsung,s2mps11-clk",
3134bcae	76	}
9b6d1343 SK	77	};
9b6d1343 SK	78
3bc2ee91 CC	79	static const struct mfd_cell s2mps13_devs[] = {
	80	{ .name = "s2mps13-pmic", },
	81	{ .name = "s2mps13-rtc", },
	82	{
	83	.name = "s2mps13-clk",
	84	.of_compatible = "samsung,s2mps13-clk",
	85	},
	86	};
	87
dc691966 KK	88	static const struct mfd_cell s2mps14_devs[] = {
	89	{
	90	.name = "s2mps14-pmic",
	91	}, {
	92	.name = "s2mps14-rtc",
	93	}, {
	94	.name = "s2mps14-clk",
53c31b34	95	.of_compatible = "samsung,s2mps14-clk",
dc691966 KK	96	}
	97	};
	98
ce24991e SK	99	static const struct mfd_cell s2mpa01_devs[] = {
	100	{
	101	.name = "s2mpa01-pmic",
	102	},
	103	};
	104
54e8827d CC	105	static const struct mfd_cell s2mpu02_devs[] = {
	106	{ .name = "s2mpu02-pmic", },
	107	{ .name = "s2mpu02-rtc", },
	108	{
	109	.name = "s2mpu02-clk",
	110	.of_compatible = "samsung,s2mpu02-clk",
	111	}
	112	};
	113
26aec009	114	#ifdef CONFIG_OF
df20b7c5	115	static const struct of_device_id sec_dt_match[] = {
26aec009 ADK	116	{ .compatible = "samsung,s5m8767-pmic",
26aec009 ADK	117	.data = (void *)S5M8767X,
ce24991e SK	118	}, {
ce24991e SK	119	.compatible = "samsung,s2mps11-pmic",
aa32acad	120	.data = (void *)S2MPS11X,
3bc2ee91 CC	121	}, {
	122	.compatible = "samsung,s2mps13-pmic",
	123	.data = (void *)S2MPS13X,
ce24991e SK	124	}, {
ce24991e SK	125	.compatible = "samsung,s2mps14-pmic",
dc691966	126	.data = (void *)S2MPS14X,
ce24991e SK	127	}, {
	128	.compatible = "samsung,s2mpa01-pmic",
	129	.data = (void *)S2MPA01,
54e8827d CC	130	}, {
	131	.compatible = "samsung,s2mpu02-pmic",
	132	.data = (void *)S2MPU02,
ce24991e SK	133	}, {
ce24991e SK	134	/* Sentinel */
dc691966	135	},
26aec009 ADK	136	};
	137	#endif
	138
ce24991e SK	139	static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
	140	{
	141	switch (reg) {
	142	case S2MPA01_REG_INT1M:
	143	case S2MPA01_REG_INT2M:
	144	case S2MPA01_REG_INT3M:
	145	return false;
	146	default:
	147	return true;
	148	}
	149	}
	150
6b845ba9 MB	151	static bool s2mps11_volatile(struct device *dev, unsigned int reg)
	152	{
	153	switch (reg) {
	154	case S2MPS11_REG_INT1M:
	155	case S2MPS11_REG_INT2M:
	156	case S2MPS11_REG_INT3M:
	157	return false;
	158	default:
	159	return true;
	160	}
	161	}
	162
00e2573d CC	163	static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
	164	{
	165	switch (reg) {
	166	case S2MPU02_REG_INT1M:
	167	case S2MPU02_REG_INT2M:
	168	case S2MPU02_REG_INT3M:
	169	return false;
	170	default:
	171	return true;
	172	}
	173	}
	174
6b845ba9 MB	175	static bool s5m8763_volatile(struct device *dev, unsigned int reg)
	176	{
	177	switch (reg) {
	178	case S5M8763_REG_IRQM1:
	179	case S5M8763_REG_IRQM2:
	180	case S5M8763_REG_IRQM3:
	181	case S5M8763_REG_IRQM4:
	182	return false;
	183	default:
	184	return true;
	185	}
	186	}
	187
a30fffb0	188	static const struct regmap_config sec_regmap_config = {
0f5f7078 SK	189	.reg_bits = 8,
	190	.val_bits = 8,
	191	};
	192
ce24991e SK	193	static const struct regmap_config s2mpa01_regmap_config = {
	194	.reg_bits = 8,
	195	.val_bits = 8,
	196
	197	.max_register = S2MPA01_REG_LDO_OVCB4,
	198	.volatile_reg = s2mpa01_volatile,
	199	.cache_type = REGCACHE_FLAT,
	200	};
	201
a30fffb0	202	static const struct regmap_config s2mps11_regmap_config = {
25f311fa MB	203	.reg_bits = 8,
	204	.val_bits = 8,
	205
	206	.max_register = S2MPS11_REG_L38CTRL,
6b845ba9 MB	207	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	208	.cache_type = REGCACHE_FLAT,
25f311fa MB	209	};
25f311fa MB	210
76b9840b CC	211	static const struct regmap_config s2mps13_regmap_config = {
	212	.reg_bits = 8,
	213	.val_bits = 8,
	214
	215	.max_register = S2MPS13_REG_LDODSCH5,
	216	.volatile_reg = s2mps11_volatile,
	217	.cache_type = REGCACHE_FLAT,
	218	};
	219
dc691966 KK	220	static const struct regmap_config s2mps14_regmap_config = {
	221	.reg_bits = 8,
	222	.val_bits = 8,
	223
	224	.max_register = S2MPS14_REG_LDODSCH3,
	225	.volatile_reg = s2mps11_volatile,
	226	.cache_type = REGCACHE_FLAT,
	227	};
	228
00e2573d CC	229	static const struct regmap_config s2mpu02_regmap_config = {
	230	.reg_bits = 8,
	231	.val_bits = 8,
	232
	233	.max_register = S2MPU02_REG_DVSDATA,
	234	.volatile_reg = s2mpu02_volatile,
	235	.cache_type = REGCACHE_FLAT,
	236	};
	237
a30fffb0	238	static const struct regmap_config s5m8763_regmap_config = {
25f311fa MB	239	.reg_bits = 8,
	240	.val_bits = 8,
	241
	242	.max_register = S5M8763_REG_LBCNFG2,
6b845ba9 MB	243	.volatile_reg = s5m8763_volatile,
6b845ba9 MB	244	.cache_type = REGCACHE_FLAT,
25f311fa MB	245	};
25f311fa MB	246
a30fffb0	247	static const struct regmap_config s5m8767_regmap_config = {
25f311fa MB	248	.reg_bits = 8,
	249	.val_bits = 8,
	250
	251	.max_register = S5M8767_REG_LDO28CTRL,
6b845ba9 MB	252	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	253	.cache_type = REGCACHE_FLAT,
25f311fa	254	};
26aec009	255
c2c9f1fe KK	256	static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
	257	{
	258	unsigned int val;
	259
	260	/* For each device type, the REG_ID is always the first register */
	261	if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
	262	dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
	263	}
	264
8a97d428 KK	265	static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
	266	{
	267	int err;
	268
	269	if (sec_pmic->device_type != S2MPS13X)
	270	return;
	271
	272	if (sec_pmic->pdata->disable_wrstbi) {
	273	/*
	274	* If WRSTBI pin is pulled down this feature must be disabled
	275	* because each Suspend to RAM will trigger buck voltage reset
	276	* to default values.
	277	*/
	278	err = regmap_update_bits(sec_pmic->regmap_pmic,
	279	S2MPS13_REG_WRSTBI,
	280	S2MPS13_REG_WRSTBI_MASK, 0x0);
	281	if (err)
	282	dev_warn(sec_pmic->dev,
	283	"Cannot initialize WRSTBI config: %d\n",
	284	err);
	285	}
	286	}
	287
26aec009 ADK	288	#ifdef CONFIG_OF
	289	/*
	290	* Only the common platform data elements for s5m8767 are parsed here from the
	291	* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
	292	* others have to parse their own platform data elements from device tree.
	293	*
	294	* The s5m8767 platform data structure is instantiated here and the drivers for
	295	* the sub-modules need not instantiate another instance while parsing their
	296	* platform data.
	297	*/
	298	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
	299	struct device *dev)
	300	{
	301	struct sec_platform_data *pd;
	302
	303	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
82a00c49	304	if (!pd)
26aec009	305	return ERR_PTR(-ENOMEM);
26aec009 ADK	306
	307	/*
	308	* ToDo: the 'wakeup' member in the platform data is more of a linux
	309	* specfic information. Hence, there is no binding for that yet and
	310	* not parsed here.
	311	*/
	312
d785334a KK	313	pd->manual_poweroff = of_property_read_bool(dev->of_node,
d785334a KK	314	"samsung,s2mps11-acokb-ground");
8a97d428 KK	315	pd->disable_wrstbi = of_property_read_bool(dev->of_node,
8a97d428 KK	316	"samsung,s2mps11-wrstbi-ground");
26aec009 ADK	317	return pd;
	318	}
	319	#else
197bf856	320	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
26aec009 ADK	321	struct device *dev)
26aec009 ADK	322	{
005718c0	323	return NULL;
26aec009 ADK	324	}
	325	#endif
	326
8f695de5	327	static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
26aec009 ADK	328	const struct i2c_device_id *id)
	329	{
	330	#ifdef CONFIG_OF
	331	if (i2c->dev.of_node) {
	332	const struct of_device_id *match;
b6c1cb4d	333
26aec009	334	match = of_match_node(sec_dt_match, i2c->dev.of_node);
8f695de5	335	return (unsigned long)match->data;
26aec009 ADK	336	}
26aec009 ADK	337	#endif
8f695de5	338	return id->driver_data;
26aec009 ADK	339	}
26aec009 ADK	340
63063bfb	341	static int sec_pmic_probe(struct i2c_client *i2c,
0f5f7078 SK	342	const struct i2c_device_id *id)
0f5f7078 SK	343	{
334a41ce	344	struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
e349c910	345	const struct regmap_config *regmap;
54e8827d	346	const struct mfd_cell *sec_devs;
63063bfb	347	struct sec_pmic_dev *sec_pmic;
9549b5ff	348	unsigned long device_type;
54e8827d	349	int ret, num_sec_devs;
0f5f7078	350
63063bfb	351	sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
621210e2	352	GFP_KERNEL);
63063bfb	353	if (sec_pmic == NULL)
0f5f7078 SK	354	return -ENOMEM;
0f5f7078 SK	355
63063bfb SK	356	i2c_set_clientdata(i2c, sec_pmic);
	357	sec_pmic->dev = &i2c->dev;
	358	sec_pmic->i2c = i2c;
	359	sec_pmic->irq = i2c->irq;
9549b5ff	360	device_type = sec_i2c_get_driver_data(i2c, id);
26aec009 ADK	361
	362	if (sec_pmic->dev->of_node) {
	363	pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
	364	if (IS_ERR(pdata)) {
	365	ret = PTR_ERR(pdata);
	366	return ret;
	367	}
9549b5ff	368	pdata->device_type = device_type;
26aec009	369	}
0f5f7078	370	if (pdata) {
63063bfb	371	sec_pmic->device_type = pdata->device_type;
63063bfb SK	372	sec_pmic->irq_base = pdata->irq_base;
63063bfb SK	373	sec_pmic->wakeup = pdata->wakeup;
26aec009	374	sec_pmic->pdata = pdata;
0f5f7078 SK	375	}
0f5f7078 SK	376
25f311fa	377	switch (sec_pmic->device_type) {
ce24991e SK	378	case S2MPA01:
	379	regmap = &s2mpa01_regmap_config;
	380	break;
25f311fa MB	381	case S2MPS11X:
25f311fa MB	382	regmap = &s2mps11_regmap_config;
dc691966	383	break;
76b9840b CC	384	case S2MPS13X:
	385	regmap = &s2mps13_regmap_config;
	386	break;
dc691966 KK	387	case S2MPS14X:
dc691966 KK	388	regmap = &s2mps14_regmap_config;
25f311fa MB	389	break;
	390	case S5M8763X:
	391	regmap = &s5m8763_regmap_config;
	392	break;
	393	case S5M8767X:
	394	regmap = &s5m8767_regmap_config;
	395	break;
00e2573d CC	396	case S2MPU02:
	397	regmap = &s2mpu02_regmap_config;
	398	break;
25f311fa MB	399	default:
	400	regmap = &sec_regmap_config;
	401	break;
	402	}
	403
3e1e4a5f KK	404	sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
	405	if (IS_ERR(sec_pmic->regmap_pmic)) {
	406	ret = PTR_ERR(sec_pmic->regmap_pmic);
0f5f7078	407	dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
61a2af30	408	ret);
1092e1c7	409	return ret;
0f5f7078 SK	410	}
0f5f7078 SK	411
c3ebb30a	412	if (pdata && pdata->cfg_pmic_irq)
0f5f7078 SK	413	pdata->cfg_pmic_irq();
0f5f7078 SK	414
63063bfb	415	sec_irq_init(sec_pmic);
0f5f7078	416
63063bfb	417	pm_runtime_set_active(sec_pmic->dev);
0f5f7078	418
63063bfb	419	switch (sec_pmic->device_type) {
88a1cfd6	420	case S5M8751X:
54e8827d CC	421	sec_devs = s5m8751_devs;
54e8827d CC	422	num_sec_devs = ARRAY_SIZE(s5m8751_devs);
88a1cfd6 SK	423	break;
88a1cfd6 SK	424	case S5M8763X:
54e8827d CC	425	sec_devs = s5m8763_devs;
54e8827d CC	426	num_sec_devs = ARRAY_SIZE(s5m8763_devs);
88a1cfd6 SK	427	break;
88a1cfd6 SK	428	case S5M8767X:
54e8827d CC	429	sec_devs = s5m8767_devs;
54e8827d CC	430	num_sec_devs = ARRAY_SIZE(s5m8767_devs);
88a1cfd6	431	break;
ce24991e	432	case S2MPA01:
54e8827d CC	433	sec_devs = s2mpa01_devs;
54e8827d CC	434	num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
ce24991e	435	break;
9b6d1343	436	case S2MPS11X:
54e8827d CC	437	sec_devs = s2mps11_devs;
54e8827d CC	438	num_sec_devs = ARRAY_SIZE(s2mps11_devs);
9b6d1343	439	break;
3bc2ee91 CC	440	case S2MPS13X:
	441	sec_devs = s2mps13_devs;
	442	num_sec_devs = ARRAY_SIZE(s2mps13_devs);
	443	break;
dc691966	444	case S2MPS14X:
54e8827d CC	445	sec_devs = s2mps14_devs;
	446	num_sec_devs = ARRAY_SIZE(s2mps14_devs);
	447	break;
	448	case S2MPU02:
	449	sec_devs = s2mpu02_devs;
	450	num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
dc691966	451	break;
88a1cfd6 SK	452	default:
	453	/* If this happens the probe function is problem */
	454	BUG();
	455	}
54e8827d CC	456	ret = mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, NULL,
54e8827d CC	457	0, NULL);
15447a46	458	if (ret)
8c66eece	459	goto err_mfd;
0f5f7078	460
f6d6daaf	461	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
8a97d428	462	sec_pmic_configure(sec_pmic);
c2c9f1fe	463	sec_pmic_dump_rev(sec_pmic);
f6d6daaf	464
0f5f7078 SK	465	return ret;
0f5f7078 SK	466
8c66eece	467	err_mfd:
63063bfb	468	sec_irq_exit(sec_pmic);
0f5f7078 SK	469	return ret;
	470	}
	471
63063bfb	472	static int sec_pmic_remove(struct i2c_client *i2c)
0f5f7078	473	{
63063bfb	474	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
0f5f7078	475
63063bfb SK	476	mfd_remove_devices(sec_pmic->dev);
63063bfb SK	477	sec_irq_exit(sec_pmic);
0f5f7078 SK	478	return 0;
	479	}
	480
d785334a KK	481	static void sec_pmic_shutdown(struct i2c_client *i2c)
	482	{
	483	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	484	unsigned int reg, mask;
	485
	486	if (!sec_pmic->pdata->manual_poweroff)
	487	return;
	488
	489	switch (sec_pmic->device_type) {
	490	case S2MPS11X:
	491	reg = S2MPS11_REG_CTRL1;
	492	mask = S2MPS11_CTRL1_PWRHOLD_MASK;
	493	break;
	494	default:
	495	/*
	496	* Currently only one board with S2MPS11 needs this, so just
	497	* ignore the rest.
	498	*/
	499	dev_warn(sec_pmic->dev,
	500	"Unsupported device %lu for manual power off\n",
	501	sec_pmic->device_type);
	502	return;
	503	}
	504
	505	regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
	506	}
	507
8321bbf8	508	#ifdef CONFIG_PM_SLEEP
f6d6daaf KK	509	static int sec_pmic_suspend(struct device *dev)
	510	{
	511	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	512	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	513
360d15d6	514	if (device_may_wakeup(dev))
f6d6daaf	515	enable_irq_wake(sec_pmic->irq);
360d15d6 KK	516	/*
	517	* PMIC IRQ must be disabled during suspend for RTC alarm
	518	* to work properly.
	519	* When device is woken up from suspend, an
	520	* interrupt occurs before resuming I2C bus controller.
	521	* The interrupt is handled by regmap_irq_thread which tries
	522	* to read RTC registers. This read fails (I2C is still
	523	* suspended) and RTC Alarm interrupt is disabled.
	524	*/
	525	disable_irq(sec_pmic->irq);
f6d6daaf KK	526
	527	return 0;
	528	}
	529
	530	static int sec_pmic_resume(struct device *dev)
	531	{
	532	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	533	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	534
360d15d6	535	if (device_may_wakeup(dev))
f6d6daaf	536	disable_irq_wake(sec_pmic->irq);
360d15d6	537	enable_irq(sec_pmic->irq);
f6d6daaf KK	538
	539	return 0;
	540	}
8321bbf8	541	#endif /* CONFIG_PM_SLEEP */
f6d6daaf KK	542
	543	static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
	544
63063bfb SK	545	static const struct i2c_device_id sec_pmic_id[] = {
63063bfb SK	546	{ "sec_pmic", 0 },
0f5f7078 SK	547	{ }
0f5f7078 SK	548	};
63063bfb	549	MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
0f5f7078	550
63063bfb	551	static struct i2c_driver sec_pmic_driver = {
0f5f7078	552	.driver = {
63063bfb	553	.name = "sec_pmic",
f6d6daaf	554	.pm = &sec_pmic_pm_ops,
26aec009	555	.of_match_table = of_match_ptr(sec_dt_match),
0f5f7078	556	},
63063bfb SK	557	.probe = sec_pmic_probe,
63063bfb SK	558	.remove = sec_pmic_remove,
d785334a	559	.shutdown = sec_pmic_shutdown,
63063bfb	560	.id_table = sec_pmic_id,
0f5f7078 SK	561	};
0f5f7078 SK	562
63063bfb	563	static int __init sec_pmic_init(void)
0f5f7078	564	{
63063bfb	565	return i2c_add_driver(&sec_pmic_driver);
0f5f7078 SK	566	}
0f5f7078 SK	567
63063bfb	568	subsys_initcall(sec_pmic_init);
0f5f7078	569
63063bfb	570	static void __exit sec_pmic_exit(void)
0f5f7078	571	{
63063bfb	572	i2c_del_driver(&sec_pmic_driver);
0f5f7078	573	}
63063bfb	574	module_exit(sec_pmic_exit);
0f5f7078 SK	575
	576	MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
	577	MODULE_DESCRIPTION("Core support for the S5M MFD");
	578	MODULE_LICENSE("GPL");