[mirror_ubuntu-artful-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/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 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 int max77693_i2c_probe(struct i2c_client *i2c,
			      const struct i2c_device_id *id)
{
	struct max77693_dev *max77693;
	struct max77693_platform_data *pdata = dev_get_platdata(&i2c->dev);
	u8 reg_data;
	int ret = 0;

	if (!pdata) {
		dev_err(&i2c->dev, "No platform data found.\n");
		return -EINVAL;
	}

	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;
	}

	max77693->wakeup = pdata->wakeup;

	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_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;

	device_init_wakeup(max77693->dev, pdata->wakeup);

	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,
};

static struct i2c_driver max77693_i2c_driver = {
	.driver = {
		   .name = "max77693",
		   .owner = THIS_MODULE,
		   .pm = &max77693_pm,
	},
	.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>
	31	#include <linux/pm_runtime.h>
	32	#include <linux/mutex.h>
	33	#include <linux/mfd/core.h>
	34	#include <linux/mfd/max77693.h>
	35	#include <linux/mfd/max77693-private.h>
	36	#include <linux/regulator/machine.h>
	37	#include <linux/regmap.h>
	38
	39	#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
	40	#define I2C_ADDR_MUIC (0x4A >> 1)
	41	#define I2C_ADDR_HAPTIC (0x90 >> 1)
	42
	43	static struct mfd_cell max77693_devs[] = {
	44	{ .name = "max77693-pmic", },
	45	{ .name = "max77693-charger", },
	46	{ .name = "max77693-flash", },
	47	{ .name = "max77693-muic", },
	48	{ .name = "max77693-haptic", },
	49	};
	50
	51	int max77693_read_reg(struct regmap map, u8 reg, u8 dest)
	52	{
	53	unsigned int val;
	54	int ret;
	55
	56	ret = regmap_read(map, reg, &val);
	57	*dest = val;
	58
	59	return ret;
	60	}
	61	EXPORT_SYMBOL_GPL(max77693_read_reg);
	62
	63	int max77693_bulk_read(struct regmap map, u8 reg, int count, u8 buf)
	64	{
65	int ret;
66
67	ret = regmap_bulk_read(map, reg, buf, count);
68
69	return ret;
70	}
71	EXPORT_SYMBOL_GPL(max77693_bulk_read);
72
73	int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
74	{
75	int ret;
76
77	ret = regmap_write(map, reg, value);
78
79	return ret;
80	}
81	EXPORT_SYMBOL_GPL(max77693_write_reg);
82
83	int max77693_bulk_write(struct regmap map, u8 reg, int count, u8 buf)
84	{
85	int ret;
86
87	ret = regmap_bulk_write(map, reg, buf, count);
88
89	return ret;
90	}
91	EXPORT_SYMBOL_GPL(max77693_bulk_write);
92
93	int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
94	{
95	int ret;
96
97	ret = regmap_update_bits(map, reg, mask, val);
98
99	return ret;
100	}
101	EXPORT_SYMBOL_GPL(max77693_update_reg);
102
103	static const struct regmap_config max77693_regmap_config = {
104	.reg_bits = 8,
105	.val_bits = 8,
106	.max_register = MAX77693_PMIC_REG_END,
107	};
108
109	static int max77693_i2c_probe(struct i2c_client *i2c,
110	const struct i2c_device_id *id)
111	{
112	struct max77693_dev *max77693;
334a41ce	113	struct max77693_platform_data *pdata = dev_get_platdata(&i2c->dev);
83871c00 CC	114	u8 reg_data;
	115	int ret = 0;
	116
2429d863 AL	117	if (!pdata) {
	118	dev_err(&i2c->dev, "No platform data found.\n");
	119	return -EINVAL;
	120	}
	121
83871c00 CC	122	max77693 = devm_kzalloc(&i2c->dev,
	123	sizeof(struct max77693_dev), GFP_KERNEL);
	124	if (max77693 == NULL)
	125	return -ENOMEM;
	126
83871c00 CC	127	i2c_set_clientdata(i2c, max77693);
	128	max77693->dev = &i2c->dev;
	129	max77693->i2c = i2c;
	130	max77693->irq = i2c->irq;
	131	max77693->type = id->driver_data;
	132
2429d863 AL	133	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
	134	if (IS_ERR(max77693->regmap)) {
	135	ret = PTR_ERR(max77693->regmap);
	136	dev_err(max77693->dev, "failed to allocate register map: %d\n",
	137	ret);
	138	return ret;
	139	}
83871c00 CC	140
	141	max77693->wakeup = pdata->wakeup;
	142
2429d863 AL	143	ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
	144	&reg_data);
	145	if (ret < 0) {
83871c00	146	dev_err(max77693->dev, "device not found on this channel\n");
2429d863	147	return ret;
83871c00 CC	148	} else
	149	dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
	150
	151	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
	152	i2c_set_clientdata(max77693->muic, max77693);
	153
	154	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
	155	i2c_set_clientdata(max77693->haptic, max77693);
	156
b186b124 CC	157	/*
	158	* Initialize register map for MUIC device because use regmap-muic
	159	* instance of MUIC device when irq of max77693 is initialized
	160	* before call max77693-muic probe() function.
	161	*/
	162	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
	163	&max77693_regmap_config);
	164	if (IS_ERR(max77693->regmap_muic)) {
	165	ret = PTR_ERR(max77693->regmap_muic);
	166	dev_err(max77693->dev,
	167	"failed to allocate register map: %d\n", ret);
2429d863	168	goto err_regmap_muic;
b186b124 CC	169	}
b186b124 CC	170
6592ebb3 CC	171	ret = max77693_irq_init(max77693);
6592ebb3 CC	172	if (ret < 0)
ff2b7ac6	173	goto err_irq;
6592ebb3	174
83871c00 CC	175	pm_runtime_set_active(max77693->dev);
	176
	177	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
0848c94f	178	ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
83871c00 CC	179	if (ret < 0)
	180	goto err_mfd;
	181
6592ebb3 CC	182	device_init_wakeup(max77693->dev, pdata->wakeup);
6592ebb3 CC	183
83871c00 CC	184	return ret;
	185
	186	err_mfd:
ff2b7ac6 AL	187	max77693_irq_exit(max77693);
ff2b7ac6 AL	188	err_irq:
2429d863	189	err_regmap_muic:
83871c00 CC	190	i2c_unregister_device(max77693->muic);
83871c00 CC	191	i2c_unregister_device(max77693->haptic);
83871c00 CC	192	return ret;
	193	}
	194
	195	static int max77693_i2c_remove(struct i2c_client *i2c)
	196	{
	197	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	198
	199	mfd_remove_devices(max77693->dev);
ff2b7ac6	200	max77693_irq_exit(max77693);
83871c00 CC	201	i2c_unregister_device(max77693->muic);
	202	i2c_unregister_device(max77693->haptic);
	203
	204	return 0;
	205	}
	206
	207	static const struct i2c_device_id max77693_i2c_id[] = {
	208	{ "max77693", TYPE_MAX77693 },
	209	{ }
	210	};
	211	MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
	212
6592ebb3 CC	213	static int max77693_suspend(struct device *dev)
	214	{
	215	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	216	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	217
	218	if (device_may_wakeup(dev))
	219	irq_set_irq_wake(max77693->irq, 1);
	220	return 0;
	221	}
	222
	223	static int max77693_resume(struct device *dev)
	224	{
	225	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	226	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	227
	228	if (device_may_wakeup(dev))
	229	irq_set_irq_wake(max77693->irq, 0);
	230	return max77693_irq_resume(max77693);
	231	}
	232
12477a32	233	static const struct dev_pm_ops max77693_pm = {
6592ebb3 CC	234	.suspend = max77693_suspend,
	235	.resume = max77693_resume,
	236	};
	237
83871c00 CC	238	static struct i2c_driver max77693_i2c_driver = {
	239	.driver = {
	240	.name = "max77693",
	241	.owner = THIS_MODULE,
6592ebb3	242	.pm = &max77693_pm,
83871c00 CC	243	},
	244	.probe = max77693_i2c_probe,
	245	.remove = max77693_i2c_remove,
	246	.id_table = max77693_i2c_id,
	247	};
	248
	249	static int __init max77693_i2c_init(void)
	250	{
	251	return i2c_add_driver(&max77693_i2c_driver);
	252	}
	253	/* init early so consumer devices can complete system boot */
	254	subsys_initcall(max77693_i2c_init);
	255
	256	static void __exit max77693_i2c_exit(void)
	257	{
	258	i2c_del_driver(&max77693_i2c_driver);
	259	}
	260	module_exit(max77693_i2c_exit);
	261
	262	MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
	263	MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
	264	MODULE_LICENSE("GPL");