[linux-block.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/s2mps15.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-regulator",
	}, {
		.name = "s2mps14-rtc",
	}, {
		.name = "s2mps11-clk",
		.of_compatible = "samsung,s2mps11-clk",
	}
};

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

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

static const struct mfd_cell s2mps15_devs[] = {
	{
		.name = "s2mps15-regulator",
	}, {
		.name = "s2mps15-rtc",
	}, {
		.name = "s2mps13-clk",
		.of_compatible = "samsung,s2mps13-clk",
	},
};

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

static const struct mfd_cell s2mpu02_devs[] = {
	{
		.name = "s2mpu02-regulator",
	},
};

#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,s2mps15-pmic",
		.data = (void *)S2MPS15X,
	}, {
		.compatible = "samsung,s2mpa01-pmic",
		.data = (void *)S2MPA01,
	}, {
		.compatible = "samsung,s2mpu02-pmic",
		.data = (void *)S2MPU02,
	}, {
		/* Sentinel */
	},
};
MODULE_DEVICE_TABLE(of, sec_dt_match);
#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 s2mps15_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = S2MPS15_REG_LDODSCH4,
	.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 S2MPS15X:
		regmap = &s2mps15_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 S2MPS15X:
		sec_devs = s2mps15_devs;
		num_sec_devs = ARRAY_SIZE(s2mps15_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 = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,
				   NULL, 0, NULL);
	if (ret)
		return ret;

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

	return ret;
}

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 = to_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 = to_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,
	.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>
9e4808d2	32	#include <linux/mfd/samsung/s2mps15.h>
00e2573d	33	#include <linux/mfd/samsung/s2mpu02.h>
25f311fa MB	34	#include <linux/mfd/samsung/s5m8763.h>
25f311fa MB	35	#include <linux/mfd/samsung/s5m8767.h>
0f5f7078 SK	36	#include <linux/regmap.h>
0f5f7078 SK	37
5ac98553	38	static const struct mfd_cell s5m8751_devs[] = {
88a1cfd6 SK	39	{
	40	.name = "s5m8751-pmic",
	41	}, {
	42	.name = "s5m-charger",
	43	}, {
	44	.name = "s5m8751-codec",
	45	},
	46	};
	47
5ac98553	48	static const struct mfd_cell s5m8763_devs[] = {
88a1cfd6 SK	49	{
	50	.name = "s5m8763-pmic",
	51	}, {
	52	.name = "s5m-rtc",
	53	}, {
	54	.name = "s5m-charger",
	55	},
	56	};
	57
5ac98553	58	static const struct mfd_cell s5m8767_devs[] = {
0f5f7078 SK	59	{
	60	.name = "s5m8767-pmic",
	61	}, {
	62	.name = "s5m-rtc",
39fed00f TB	63	}, {
39fed00f TB	64	.name = "s5m8767-clk",
53c31b34	65	.of_compatible = "samsung,s5m8767-clk",
39fed00f	66	}
0f5f7078 SK	67	};
0f5f7078 SK	68
5ac98553	69	static const struct mfd_cell s2mps11_devs[] = {
9b6d1343	70	{
2fadbbf0	71	.name = "s2mps11-regulator",
eea2e596 KK	72	}, {
eea2e596 KK	73	.name = "s2mps14-rtc",
3134bcae YSB	74	}, {
3134bcae YSB	75	.name = "s2mps11-clk",
53c31b34	76	.of_compatible = "samsung,s2mps11-clk",
3134bcae	77	}
9b6d1343 SK	78	};
9b6d1343 SK	79
3bc2ee91	80	static const struct mfd_cell s2mps13_devs[] = {
2fadbbf0	81	{ .name = "s2mps13-regulator", },
3bc2ee91 CC	82	{ .name = "s2mps13-rtc", },
	83	{
	84	.name = "s2mps13-clk",
	85	.of_compatible = "samsung,s2mps13-clk",
	86	},
	87	};
	88
dc691966 KK	89	static const struct mfd_cell s2mps14_devs[] = {
dc691966 KK	90	{
2fadbbf0	91	.name = "s2mps14-regulator",
dc691966 KK	92	}, {
	93	.name = "s2mps14-rtc",
	94	}, {
	95	.name = "s2mps14-clk",
53c31b34	96	.of_compatible = "samsung,s2mps14-clk",
dc691966 KK	97	}
	98	};
	99
9e4808d2 TA	100	static const struct mfd_cell s2mps15_devs[] = {
	101	{
	102	.name = "s2mps15-regulator",
	103	}, {
	104	.name = "s2mps15-rtc",
	105	}, {
	106	.name = "s2mps13-clk",
	107	.of_compatible = "samsung,s2mps13-clk",
	108	},
	109	};
	110
ce24991e SK	111	static const struct mfd_cell s2mpa01_devs[] = {
	112	{
	113	.name = "s2mpa01-pmic",
	114	},
	115	};
	116
54e8827d	117	static const struct mfd_cell s2mpu02_devs[] = {
54e8827d	118	{
2fadbbf0	119	.name = "s2mpu02-regulator",
644a3746	120	},
54e8827d CC	121	};
54e8827d CC	122
26aec009	123	#ifdef CONFIG_OF
df20b7c5	124	static const struct of_device_id sec_dt_match[] = {
26aec009 ADK	125	{ .compatible = "samsung,s5m8767-pmic",
26aec009 ADK	126	.data = (void *)S5M8767X,
ce24991e SK	127	}, {
ce24991e SK	128	.compatible = "samsung,s2mps11-pmic",
aa32acad	129	.data = (void *)S2MPS11X,
3bc2ee91 CC	130	}, {
	131	.compatible = "samsung,s2mps13-pmic",
	132	.data = (void *)S2MPS13X,
ce24991e SK	133	}, {
ce24991e SK	134	.compatible = "samsung,s2mps14-pmic",
dc691966	135	.data = (void *)S2MPS14X,
9e4808d2 TA	136	}, {
	137	.compatible = "samsung,s2mps15-pmic",
	138	.data = (void *)S2MPS15X,
ce24991e SK	139	}, {
	140	.compatible = "samsung,s2mpa01-pmic",
	141	.data = (void *)S2MPA01,
54e8827d CC	142	}, {
	143	.compatible = "samsung,s2mpu02-pmic",
	144	.data = (void *)S2MPU02,
ce24991e SK	145	}, {
ce24991e SK	146	/* Sentinel */
dc691966	147	},
26aec009	148	};
fe8166c9	149	MODULE_DEVICE_TABLE(of, sec_dt_match);
26aec009 ADK	150	#endif
26aec009 ADK	151
ce24991e SK	152	static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
	153	{
	154	switch (reg) {
	155	case S2MPA01_REG_INT1M:
	156	case S2MPA01_REG_INT2M:
	157	case S2MPA01_REG_INT3M:
	158	return false;
	159	default:
	160	return true;
	161	}
	162	}
	163
6b845ba9 MB	164	static bool s2mps11_volatile(struct device *dev, unsigned int reg)
	165	{
	166	switch (reg) {
	167	case S2MPS11_REG_INT1M:
	168	case S2MPS11_REG_INT2M:
	169	case S2MPS11_REG_INT3M:
	170	return false;
	171	default:
	172	return true;
	173	}
	174	}
	175
00e2573d CC	176	static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
	177	{
	178	switch (reg) {
	179	case S2MPU02_REG_INT1M:
	180	case S2MPU02_REG_INT2M:
	181	case S2MPU02_REG_INT3M:
	182	return false;
	183	default:
	184	return true;
	185	}
	186	}
	187
6b845ba9 MB	188	static bool s5m8763_volatile(struct device *dev, unsigned int reg)
	189	{
	190	switch (reg) {
	191	case S5M8763_REG_IRQM1:
	192	case S5M8763_REG_IRQM2:
	193	case S5M8763_REG_IRQM3:
	194	case S5M8763_REG_IRQM4:
	195	return false;
	196	default:
	197	return true;
	198	}
	199	}
	200
a30fffb0	201	static const struct regmap_config sec_regmap_config = {
0f5f7078 SK	202	.reg_bits = 8,
	203	.val_bits = 8,
	204	};
	205
ce24991e SK	206	static const struct regmap_config s2mpa01_regmap_config = {
	207	.reg_bits = 8,
	208	.val_bits = 8,
	209
	210	.max_register = S2MPA01_REG_LDO_OVCB4,
	211	.volatile_reg = s2mpa01_volatile,
	212	.cache_type = REGCACHE_FLAT,
	213	};
	214
a30fffb0	215	static const struct regmap_config s2mps11_regmap_config = {
25f311fa MB	216	.reg_bits = 8,
	217	.val_bits = 8,
	218
	219	.max_register = S2MPS11_REG_L38CTRL,
6b845ba9 MB	220	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	221	.cache_type = REGCACHE_FLAT,
25f311fa MB	222	};
25f311fa MB	223
76b9840b CC	224	static const struct regmap_config s2mps13_regmap_config = {
	225	.reg_bits = 8,
	226	.val_bits = 8,
	227
	228	.max_register = S2MPS13_REG_LDODSCH5,
	229	.volatile_reg = s2mps11_volatile,
	230	.cache_type = REGCACHE_FLAT,
	231	};
	232
dc691966 KK	233	static const struct regmap_config s2mps14_regmap_config = {
	234	.reg_bits = 8,
	235	.val_bits = 8,
	236
	237	.max_register = S2MPS14_REG_LDODSCH3,
	238	.volatile_reg = s2mps11_volatile,
	239	.cache_type = REGCACHE_FLAT,
	240	};
	241
9e4808d2 TA	242	static const struct regmap_config s2mps15_regmap_config = {
	243	.reg_bits = 8,
	244	.val_bits = 8,
	245
	246	.max_register = S2MPS15_REG_LDODSCH4,
	247	.volatile_reg = s2mps11_volatile,
	248	.cache_type = REGCACHE_FLAT,
	249	};
	250
00e2573d CC	251	static const struct regmap_config s2mpu02_regmap_config = {
	252	.reg_bits = 8,
	253	.val_bits = 8,
	254
	255	.max_register = S2MPU02_REG_DVSDATA,
	256	.volatile_reg = s2mpu02_volatile,
	257	.cache_type = REGCACHE_FLAT,
	258	};
	259
a30fffb0	260	static const struct regmap_config s5m8763_regmap_config = {
25f311fa MB	261	.reg_bits = 8,
	262	.val_bits = 8,
	263
	264	.max_register = S5M8763_REG_LBCNFG2,
6b845ba9 MB	265	.volatile_reg = s5m8763_volatile,
6b845ba9 MB	266	.cache_type = REGCACHE_FLAT,
25f311fa MB	267	};
25f311fa MB	268
a30fffb0	269	static const struct regmap_config s5m8767_regmap_config = {
25f311fa MB	270	.reg_bits = 8,
	271	.val_bits = 8,
	272
	273	.max_register = S5M8767_REG_LDO28CTRL,
6b845ba9 MB	274	.volatile_reg = s2mps11_volatile,
6b845ba9 MB	275	.cache_type = REGCACHE_FLAT,
25f311fa	276	};
26aec009	277
c2c9f1fe KK	278	static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
	279	{
	280	unsigned int val;
	281
	282	/* For each device type, the REG_ID is always the first register */
	283	if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
	284	dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
	285	}
	286
8a97d428 KK	287	static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
	288	{
	289	int err;
	290
	291	if (sec_pmic->device_type != S2MPS13X)
	292	return;
	293
	294	if (sec_pmic->pdata->disable_wrstbi) {
	295	/*
	296	* If WRSTBI pin is pulled down this feature must be disabled
	297	* because each Suspend to RAM will trigger buck voltage reset
	298	* to default values.
	299	*/
	300	err = regmap_update_bits(sec_pmic->regmap_pmic,
	301	S2MPS13_REG_WRSTBI,
	302	S2MPS13_REG_WRSTBI_MASK, 0x0);
	303	if (err)
	304	dev_warn(sec_pmic->dev,
	305	"Cannot initialize WRSTBI config: %d\n",
	306	err);
	307	}
	308	}
	309
26aec009 ADK	310	#ifdef CONFIG_OF
	311	/*
	312	* Only the common platform data elements for s5m8767 are parsed here from the
	313	* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
	314	* others have to parse their own platform data elements from device tree.
	315	*
	316	* The s5m8767 platform data structure is instantiated here and the drivers for
	317	* the sub-modules need not instantiate another instance while parsing their
	318	* platform data.
	319	*/
	320	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
	321	struct device *dev)
	322	{
	323	struct sec_platform_data *pd;
	324
	325	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
82a00c49	326	if (!pd)
26aec009	327	return ERR_PTR(-ENOMEM);
26aec009 ADK	328
	329	/*
	330	* ToDo: the 'wakeup' member in the platform data is more of a linux
	331	* specfic information. Hence, there is no binding for that yet and
	332	* not parsed here.
	333	*/
	334
d785334a KK	335	pd->manual_poweroff = of_property_read_bool(dev->of_node,
d785334a KK	336	"samsung,s2mps11-acokb-ground");
8a97d428 KK	337	pd->disable_wrstbi = of_property_read_bool(dev->of_node,
8a97d428 KK	338	"samsung,s2mps11-wrstbi-ground");
26aec009 ADK	339	return pd;
	340	}
	341	#else
197bf856	342	static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
26aec009 ADK	343	struct device *dev)
26aec009 ADK	344	{
005718c0	345	return NULL;
26aec009 ADK	346	}
	347	#endif
	348
8f695de5	349	static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
26aec009 ADK	350	const struct i2c_device_id *id)
	351	{
	352	#ifdef CONFIG_OF
	353	if (i2c->dev.of_node) {
	354	const struct of_device_id *match;
b6c1cb4d	355
26aec009	356	match = of_match_node(sec_dt_match, i2c->dev.of_node);
8f695de5	357	return (unsigned long)match->data;
26aec009 ADK	358	}
26aec009 ADK	359	#endif
8f695de5	360	return id->driver_data;
26aec009 ADK	361	}
26aec009 ADK	362
63063bfb	363	static int sec_pmic_probe(struct i2c_client *i2c,
0f5f7078 SK	364	const struct i2c_device_id *id)
0f5f7078 SK	365	{
334a41ce	366	struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
e349c910	367	const struct regmap_config *regmap;
54e8827d	368	const struct mfd_cell *sec_devs;
63063bfb	369	struct sec_pmic_dev *sec_pmic;
9549b5ff	370	unsigned long device_type;
54e8827d	371	int ret, num_sec_devs;
0f5f7078	372
63063bfb	373	sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
621210e2	374	GFP_KERNEL);
63063bfb	375	if (sec_pmic == NULL)
0f5f7078 SK	376	return -ENOMEM;
0f5f7078 SK	377
63063bfb SK	378	i2c_set_clientdata(i2c, sec_pmic);
	379	sec_pmic->dev = &i2c->dev;
	380	sec_pmic->i2c = i2c;
	381	sec_pmic->irq = i2c->irq;
9549b5ff	382	device_type = sec_i2c_get_driver_data(i2c, id);
26aec009 ADK	383
	384	if (sec_pmic->dev->of_node) {
	385	pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
	386	if (IS_ERR(pdata)) {
	387	ret = PTR_ERR(pdata);
	388	return ret;
	389	}
9549b5ff	390	pdata->device_type = device_type;
26aec009	391	}
0f5f7078	392	if (pdata) {
63063bfb	393	sec_pmic->device_type = pdata->device_type;
63063bfb SK	394	sec_pmic->irq_base = pdata->irq_base;
63063bfb SK	395	sec_pmic->wakeup = pdata->wakeup;
26aec009	396	sec_pmic->pdata = pdata;
0f5f7078 SK	397	}
0f5f7078 SK	398
25f311fa	399	switch (sec_pmic->device_type) {
ce24991e SK	400	case S2MPA01:
	401	regmap = &s2mpa01_regmap_config;
	402	break;
25f311fa MB	403	case S2MPS11X:
25f311fa MB	404	regmap = &s2mps11_regmap_config;
dc691966	405	break;
76b9840b CC	406	case S2MPS13X:
	407	regmap = &s2mps13_regmap_config;
	408	break;
dc691966 KK	409	case S2MPS14X:
dc691966 KK	410	regmap = &s2mps14_regmap_config;
25f311fa	411	break;
9e4808d2 TA	412	case S2MPS15X:
	413	regmap = &s2mps15_regmap_config;
	414	break;
25f311fa MB	415	case S5M8763X:
	416	regmap = &s5m8763_regmap_config;
	417	break;
	418	case S5M8767X:
	419	regmap = &s5m8767_regmap_config;
	420	break;
00e2573d CC	421	case S2MPU02:
	422	regmap = &s2mpu02_regmap_config;
	423	break;
25f311fa MB	424	default:
	425	regmap = &sec_regmap_config;
	426	break;
	427	}
	428
3e1e4a5f KK	429	sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
	430	if (IS_ERR(sec_pmic->regmap_pmic)) {
	431	ret = PTR_ERR(sec_pmic->regmap_pmic);
0f5f7078	432	dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
61a2af30	433	ret);
1092e1c7	434	return ret;
0f5f7078 SK	435	}
0f5f7078 SK	436
c3ebb30a	437	if (pdata && pdata->cfg_pmic_irq)
0f5f7078 SK	438	pdata->cfg_pmic_irq();
0f5f7078 SK	439
63063bfb	440	sec_irq_init(sec_pmic);
0f5f7078	441
63063bfb	442	pm_runtime_set_active(sec_pmic->dev);
0f5f7078	443
63063bfb	444	switch (sec_pmic->device_type) {
88a1cfd6	445	case S5M8751X:
54e8827d CC	446	sec_devs = s5m8751_devs;
54e8827d CC	447	num_sec_devs = ARRAY_SIZE(s5m8751_devs);
88a1cfd6 SK	448	break;
88a1cfd6 SK	449	case S5M8763X:
54e8827d CC	450	sec_devs = s5m8763_devs;
54e8827d CC	451	num_sec_devs = ARRAY_SIZE(s5m8763_devs);
88a1cfd6 SK	452	break;
88a1cfd6 SK	453	case S5M8767X:
54e8827d CC	454	sec_devs = s5m8767_devs;
54e8827d CC	455	num_sec_devs = ARRAY_SIZE(s5m8767_devs);
88a1cfd6	456	break;
ce24991e	457	case S2MPA01:
54e8827d CC	458	sec_devs = s2mpa01_devs;
54e8827d CC	459	num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
ce24991e	460	break;
9b6d1343	461	case S2MPS11X:
54e8827d CC	462	sec_devs = s2mps11_devs;
54e8827d CC	463	num_sec_devs = ARRAY_SIZE(s2mps11_devs);
9b6d1343	464	break;
3bc2ee91 CC	465	case S2MPS13X:
	466	sec_devs = s2mps13_devs;
	467	num_sec_devs = ARRAY_SIZE(s2mps13_devs);
	468	break;
dc691966	469	case S2MPS14X:
54e8827d CC	470	sec_devs = s2mps14_devs;
	471	num_sec_devs = ARRAY_SIZE(s2mps14_devs);
	472	break;
9e4808d2 TA	473	case S2MPS15X:
	474	sec_devs = s2mps15_devs;
	475	num_sec_devs = ARRAY_SIZE(s2mps15_devs);
	476	break;
54e8827d CC	477	case S2MPU02:
	478	sec_devs = s2mpu02_devs;
	479	num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
dc691966	480	break;
88a1cfd6 SK	481	default:
	482	/* If this happens the probe function is problem */
	483	BUG();
	484	}
3dc6f4aa LD	485	ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,
3dc6f4aa LD	486	NULL, 0, NULL);
15447a46	487	if (ret)
3dc6f4aa	488	return ret;
0f5f7078	489
f6d6daaf	490	device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
8a97d428	491	sec_pmic_configure(sec_pmic);
c2c9f1fe	492	sec_pmic_dump_rev(sec_pmic);
f6d6daaf	493
0f5f7078	494	return ret;
0f5f7078 SK	495	}
0f5f7078 SK	496
d785334a KK	497	static void sec_pmic_shutdown(struct i2c_client *i2c)
	498	{
	499	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
	500	unsigned int reg, mask;
	501
	502	if (!sec_pmic->pdata->manual_poweroff)
	503	return;
	504
	505	switch (sec_pmic->device_type) {
	506	case S2MPS11X:
	507	reg = S2MPS11_REG_CTRL1;
	508	mask = S2MPS11_CTRL1_PWRHOLD_MASK;
	509	break;
	510	default:
	511	/*
	512	* Currently only one board with S2MPS11 needs this, so just
	513	* ignore the rest.
	514	*/
	515	dev_warn(sec_pmic->dev,
	516	"Unsupported device %lu for manual power off\n",
	517	sec_pmic->device_type);
	518	return;
	519	}
	520
	521	regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
	522	}
	523
8321bbf8	524	#ifdef CONFIG_PM_SLEEP
f6d6daaf KK	525	static int sec_pmic_suspend(struct device *dev)
f6d6daaf KK	526	{
1b5420e1	527	struct i2c_client *i2c = to_i2c_client(dev);
f6d6daaf KK	528	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
f6d6daaf KK	529
360d15d6	530	if (device_may_wakeup(dev))
f6d6daaf	531	enable_irq_wake(sec_pmic->irq);
360d15d6 KK	532	/*
	533	* PMIC IRQ must be disabled during suspend for RTC alarm
	534	* to work properly.
	535	* When device is woken up from suspend, an
	536	* interrupt occurs before resuming I2C bus controller.
	537	* The interrupt is handled by regmap_irq_thread which tries
	538	* to read RTC registers. This read fails (I2C is still
	539	* suspended) and RTC Alarm interrupt is disabled.
	540	*/
	541	disable_irq(sec_pmic->irq);
f6d6daaf KK	542
	543	return 0;
	544	}
	545
	546	static int sec_pmic_resume(struct device *dev)
	547	{
1b5420e1	548	struct i2c_client *i2c = to_i2c_client(dev);
f6d6daaf KK	549	struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
f6d6daaf KK	550
360d15d6	551	if (device_may_wakeup(dev))
f6d6daaf	552	disable_irq_wake(sec_pmic->irq);
360d15d6	553	enable_irq(sec_pmic->irq);
f6d6daaf KK	554
	555	return 0;
	556	}
8321bbf8	557	#endif /* CONFIG_PM_SLEEP */
f6d6daaf KK	558
	559	static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
	560
63063bfb SK	561	static const struct i2c_device_id sec_pmic_id[] = {
63063bfb SK	562	{ "sec_pmic", 0 },
0f5f7078 SK	563	{ }
0f5f7078 SK	564	};
63063bfb	565	MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
0f5f7078	566
63063bfb	567	static struct i2c_driver sec_pmic_driver = {
0f5f7078	568	.driver = {
63063bfb	569	.name = "sec_pmic",
f6d6daaf	570	.pm = &sec_pmic_pm_ops,
26aec009	571	.of_match_table = of_match_ptr(sec_dt_match),
0f5f7078	572	},
63063bfb	573	.probe = sec_pmic_probe,
d785334a	574	.shutdown = sec_pmic_shutdown,
63063bfb	575	.id_table = sec_pmic_id,
0f5f7078 SK	576	};
0f5f7078 SK	577
63063bfb	578	static int __init sec_pmic_init(void)
0f5f7078	579	{
63063bfb	580	return i2c_add_driver(&sec_pmic_driver);
0f5f7078 SK	581	}
0f5f7078 SK	582
63063bfb	583	subsys_initcall(sec_pmic_init);
0f5f7078	584
63063bfb	585	static void __exit sec_pmic_exit(void)
0f5f7078	586	{
63063bfb	587	i2c_del_driver(&sec_pmic_driver);
0f5f7078	588	}
63063bfb	589	module_exit(sec_pmic_exit);
0f5f7078 SK	590
	591	MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
	592	MODULE_DESCRIPTION("Core support for the S5M MFD");
	593	MODULE_LICENSE("GPL");