[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / max77693.c

/*
 * max77693.c - mfd core driver for the MAX 77693
 *
 * Copyright (C) 2012 Samsung Electronics
 * SangYoung Son <hello.son@smasung.com>
 *
 * This program is not provided / owned by Maxim Integrated Products.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * This driver is based on max8997.c
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-private.h>
#include <linux/regulator/machine.h>
#include <linux/regmap.h>

#define I2C_ADDR_PMIC	(0xCC >> 1)	/* Charger, Flash LED */
#define I2C_ADDR_MUIC	(0x4A >> 1)
#define I2C_ADDR_HAPTIC	(0x90 >> 1)

static const struct mfd_cell max77693_devs[] = {
	{ .name = "max77693-pmic", },
	{ .name = "max77693-charger", },
	{ .name = "max77693-flash", },
	{ .name = "max77693-muic", },
	{ .name = "max77693-haptic", },
};

int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
{
	unsigned int val;
	int ret;

	ret = regmap_read(map, reg, &val);
	*dest = val;

	return ret;
}
EXPORT_SYMBOL_GPL(max77693_read_reg);

int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
{
	int ret;

	ret = regmap_bulk_read(map, reg, buf, count);

	return ret;
}
EXPORT_SYMBOL_GPL(max77693_bulk_read);

int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
{
	int ret;

	ret = regmap_write(map, reg, value);

	return ret;
}
EXPORT_SYMBOL_GPL(max77693_write_reg);

int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
{
	int ret;

	ret = regmap_bulk_write(map, reg, buf, count);

	return ret;
}
EXPORT_SYMBOL_GPL(max77693_bulk_write);

int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
{
	int ret;

	ret = regmap_update_bits(map, reg, mask, val);

	return ret;
}
EXPORT_SYMBOL_GPL(max77693_update_reg);

static const struct regmap_config max77693_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = MAX77693_PMIC_REG_END,
};

static const struct regmap_config max77693_regmap_muic_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = MAX77693_MUIC_REG_END,
};

static int max77693_i2c_probe(struct i2c_client *i2c,
			      const struct i2c_device_id *id)
{
	struct max77693_dev *max77693;
	u8 reg_data;
	int ret = 0;

	max77693 = devm_kzalloc(&i2c->dev,
			sizeof(struct max77693_dev), GFP_KERNEL);
	if (max77693 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, max77693);
	max77693->dev = &i2c->dev;
	max77693->i2c = i2c;
	max77693->irq = i2c->irq;
	max77693->type = id->driver_data;

	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
	if (IS_ERR(max77693->regmap)) {
		ret = PTR_ERR(max77693->regmap);
		dev_err(max77693->dev, "failed to allocate register map: %d\n",
				ret);
		return ret;
	}

	ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
				&reg_data);
	if (ret < 0) {
		dev_err(max77693->dev, "device not found on this channel\n");
		return ret;
	} else
		dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);

	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
	i2c_set_clientdata(max77693->muic, max77693);

	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
	i2c_set_clientdata(max77693->haptic, max77693);

	/*
	 * Initialize register map for MUIC device because use regmap-muic
	 * instance of MUIC device when irq of max77693 is initialized
	 * before call max77693-muic probe() function.
	 */
	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
					 &max77693_regmap_muic_config);
	if (IS_ERR(max77693->regmap_muic)) {
		ret = PTR_ERR(max77693->regmap_muic);
		dev_err(max77693->dev,
			"failed to allocate register map: %d\n", ret);
		goto err_regmap_muic;
	}

	ret = max77693_irq_init(max77693);
	if (ret < 0)
		goto err_irq;

	pm_runtime_set_active(max77693->dev);

	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
			      ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
	if (ret < 0)
		goto err_mfd;

	return ret;

err_mfd:
	max77693_irq_exit(max77693);
err_irq:
err_regmap_muic:
	i2c_unregister_device(max77693->muic);
	i2c_unregister_device(max77693->haptic);
	return ret;
}

static int max77693_i2c_remove(struct i2c_client *i2c)
{
	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

	mfd_remove_devices(max77693->dev);
	max77693_irq_exit(max77693);
	i2c_unregister_device(max77693->muic);
	i2c_unregister_device(max77693->haptic);

	return 0;
}

static const struct i2c_device_id max77693_i2c_id[] = {
	{ "max77693", TYPE_MAX77693 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);

static int max77693_suspend(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		irq_set_irq_wake(max77693->irq, 1);
	return 0;
}

static int max77693_resume(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		irq_set_irq_wake(max77693->irq, 0);
	return max77693_irq_resume(max77693);
}

static const struct dev_pm_ops max77693_pm = {
	.suspend = max77693_suspend,
	.resume = max77693_resume,
};

#ifdef CONFIG_OF
static struct of_device_id max77693_dt_match[] = {
	{ .compatible = "maxim,max77693" },
	{},
};
#endif

static struct i2c_driver max77693_i2c_driver = {
	.driver = {
		   .name = "max77693",
		   .owner = THIS_MODULE,
		   .pm = &max77693_pm,
		   .of_match_table = of_match_ptr(max77693_dt_match),
	},
	.probe = max77693_i2c_probe,
	.remove = max77693_i2c_remove,
	.id_table = max77693_i2c_id,
};

static int __init max77693_i2c_init(void)
{
	return i2c_add_driver(&max77693_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max77693_i2c_init);

static void __exit max77693_i2c_exit(void)
{
	i2c_del_driver(&max77693_i2c_driver);
}
module_exit(max77693_i2c_exit);

MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
83871c00 CC	1	/*
	2	* max77693.c - mfd core driver for the MAX 77693
	3	*
	4	* Copyright (C) 2012 Samsung Electronics
	5	* SangYoung Son <hello.son@smasung.com>
	6	*
	7	* This program is not provided / owned by Maxim Integrated Products.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*
	23	* This driver is based on max8997.c
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/slab.h>
	28	#include <linux/i2c.h>
	29	#include <linux/err.h>
	30	#include <linux/interrupt.h>
71c7f93e	31	#include <linux/of.h>
83871c00 CC	32	#include <linux/pm_runtime.h>
	33	#include <linux/mutex.h>
	34	#include <linux/mfd/core.h>
	35	#include <linux/mfd/max77693.h>
	36	#include <linux/mfd/max77693-private.h>
	37	#include <linux/regulator/machine.h>
	38	#include <linux/regmap.h>
	39
	40	#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
	41	#define I2C_ADDR_MUIC (0x4A >> 1)
	42	#define I2C_ADDR_HAPTIC (0x90 >> 1)
	43
7c0517b1	44	static const struct mfd_cell max77693_devs[] = {
83871c00 CC	45	{ .name = "max77693-pmic", },
	46	{ .name = "max77693-charger", },
	47	{ .name = "max77693-flash", },
	48	{ .name = "max77693-muic", },
	49	{ .name = "max77693-haptic", },
	50	};
	51
	52	int max77693_read_reg(struct regmap map, u8 reg, u8 dest)
	53	{
	54	unsigned int val;
	55	int ret;
	56
	57	ret = regmap_read(map, reg, &val);
	58	*dest = val;
	59
	60	return ret;
	61	}
	62	EXPORT_SYMBOL_GPL(max77693_read_reg);
	63
	64	int max77693_bulk_read(struct regmap map, u8 reg, int count, u8 buf)
	65	{
	66	int ret;
	67
	68	ret = regmap_bulk_read(map, reg, buf, count);
	69
	70	return ret;
	71	}
	72	EXPORT_SYMBOL_GPL(max77693_bulk_read);
	73
	74	int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
	75	{
	76	int ret;
	77
	78	ret = regmap_write(map, reg, value);
	79
	80	return ret;
	81	}
	82	EXPORT_SYMBOL_GPL(max77693_write_reg);
	83
	84	int max77693_bulk_write(struct regmap map, u8 reg, int count, u8 buf)
	85	{
	86	int ret;
	87
	88	ret = regmap_bulk_write(map, reg, buf, count);
	89
	90	return ret;
	91	}
	92	EXPORT_SYMBOL_GPL(max77693_bulk_write);
	93
	94	int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
	95	{
	96	int ret;
	97
	98	ret = regmap_update_bits(map, reg, mask, val);
	99
	100	return ret;
	101	}
	102	EXPORT_SYMBOL_GPL(max77693_update_reg);
	103
	104	static const struct regmap_config max77693_regmap_config = {
	105	.reg_bits = 8,
	106	.val_bits = 8,
	107	.max_register = MAX77693_PMIC_REG_END,
	108	};
109
75ad1327 KK	110	static const struct regmap_config max77693_regmap_muic_config = {
	111	.reg_bits = 8,
	112	.val_bits = 8,
	113	.max_register = MAX77693_MUIC_REG_END,
	114	};
	115
83871c00 CC	116	static int max77693_i2c_probe(struct i2c_client *i2c,
	117	const struct i2c_device_id *id)
	118	{
	119	struct max77693_dev *max77693;
83871c00 CC	120	u8 reg_data;
	121	int ret = 0;
	122
	123	max77693 = devm_kzalloc(&i2c->dev,
	124	sizeof(struct max77693_dev), GFP_KERNEL);
	125	if (max77693 == NULL)
	126	return -ENOMEM;
	127
83871c00 CC	128	i2c_set_clientdata(i2c, max77693);
	129	max77693->dev = &i2c->dev;
	130	max77693->i2c = i2c;
	131	max77693->irq = i2c->irq;
	132	max77693->type = id->driver_data;
	133
2429d863 AL	134	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
	135	if (IS_ERR(max77693->regmap)) {
	136	ret = PTR_ERR(max77693->regmap);
	137	dev_err(max77693->dev, "failed to allocate register map: %d\n",
	138	ret);
	139	return ret;
	140	}
83871c00	141
2429d863 AL	142	ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
	143	&reg_data);
	144	if (ret < 0) {
83871c00	145	dev_err(max77693->dev, "device not found on this channel\n");
2429d863	146	return ret;
83871c00 CC	147	} else
	148	dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
	149
	150	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
	151	i2c_set_clientdata(max77693->muic, max77693);
	152
	153	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
	154	i2c_set_clientdata(max77693->haptic, max77693);
	155
b186b124 CC	156	/*
	157	* Initialize register map for MUIC device because use regmap-muic
	158	* instance of MUIC device when irq of max77693 is initialized
	159	* before call max77693-muic probe() function.
	160	*/
	161	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
75ad1327	162	&max77693_regmap_muic_config);
b186b124 CC	163	if (IS_ERR(max77693->regmap_muic)) {
	164	ret = PTR_ERR(max77693->regmap_muic);
	165	dev_err(max77693->dev,
	166	"failed to allocate register map: %d\n", ret);
2429d863	167	goto err_regmap_muic;
b186b124 CC	168	}
b186b124 CC	169
6592ebb3 CC	170	ret = max77693_irq_init(max77693);
6592ebb3 CC	171	if (ret < 0)
ff2b7ac6	172	goto err_irq;
6592ebb3	173
83871c00 CC	174	pm_runtime_set_active(max77693->dev);
	175
	176	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
0848c94f	177	ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
83871c00 CC	178	if (ret < 0)
	179	goto err_mfd;
	180
	181	return ret;
	182
	183	err_mfd:
ff2b7ac6 AL	184	max77693_irq_exit(max77693);
ff2b7ac6 AL	185	err_irq:
2429d863	186	err_regmap_muic:
83871c00 CC	187	i2c_unregister_device(max77693->muic);
83871c00 CC	188	i2c_unregister_device(max77693->haptic);
83871c00 CC	189	return ret;
	190	}
	191
	192	static int max77693_i2c_remove(struct i2c_client *i2c)
	193	{
	194	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	195
	196	mfd_remove_devices(max77693->dev);
ff2b7ac6	197	max77693_irq_exit(max77693);
83871c00 CC	198	i2c_unregister_device(max77693->muic);
	199	i2c_unregister_device(max77693->haptic);
	200
	201	return 0;
	202	}
	203
	204	static const struct i2c_device_id max77693_i2c_id[] = {
	205	{ "max77693", TYPE_MAX77693 },
	206	{ }
	207	};
	208	MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
	209
6592ebb3 CC	210	static int max77693_suspend(struct device *dev)
	211	{
	212	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	213	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	214
	215	if (device_may_wakeup(dev))
	216	irq_set_irq_wake(max77693->irq, 1);
	217	return 0;
	218	}
	219
	220	static int max77693_resume(struct device *dev)
	221	{
	222	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	223	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	224
	225	if (device_may_wakeup(dev))
	226	irq_set_irq_wake(max77693->irq, 0);
	227	return max77693_irq_resume(max77693);
	228	}
	229
12477a32	230	static const struct dev_pm_ops max77693_pm = {
6592ebb3 CC	231	.suspend = max77693_suspend,
	232	.resume = max77693_resume,
	233	};
	234
4657185c AH	235	#ifdef CONFIG_OF
	236	static struct of_device_id max77693_dt_match[] = {
	237	{ .compatible = "maxim,max77693" },
	238	{},
	239	};
	240	#endif
	241
83871c00 CC	242	static struct i2c_driver max77693_i2c_driver = {
	243	.driver = {
	244	.name = "max77693",
	245	.owner = THIS_MODULE,
6592ebb3	246	.pm = &max77693_pm,
4657185c	247	.of_match_table = of_match_ptr(max77693_dt_match),
83871c00 CC	248	},
	249	.probe = max77693_i2c_probe,
	250	.remove = max77693_i2c_remove,
	251	.id_table = max77693_i2c_id,
	252	};
	253
	254	static int __init max77693_i2c_init(void)
	255	{
	256	return i2c_add_driver(&max77693_i2c_driver);
	257	}
	258	/* init early so consumer devices can complete system boot */
	259	subsys_initcall(max77693_i2c_init);
	260
	261	static void __exit max77693_i2c_exit(void)
	262	{
	263	i2c_del_driver(&max77693_i2c_driver);
	264	}
	265	module_exit(max77693_i2c_exit);
	266
	267	MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
	268	MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
	269	MODULE_LICENSE("GPL");