[deliverable/linux.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", },
};

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;
	unsigned int 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 = regmap_read(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);
	if (!max77693->muic) {
		dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
		return -ENODEV;
	}
	i2c_set_clientdata(max77693->muic, max77693);

	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
	if (!max77693->haptic) {
		dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
		ret = -ENODEV;
		goto err_i2c_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->haptic);
err_i2c_haptic:
	i2c_unregister_device(max77693->muic);
	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 const 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
83871c00 CC	52	static const struct regmap_config max77693_regmap_config = {
	53	.reg_bits = 8,
	54	.val_bits = 8,
	55	.max_register = MAX77693_PMIC_REG_END,
	56	};
	57
75ad1327 KK	58	static const struct regmap_config max77693_regmap_muic_config = {
	59	.reg_bits = 8,
	60	.val_bits = 8,
	61	.max_register = MAX77693_MUIC_REG_END,
	62	};
	63
83871c00 CC	64	static int max77693_i2c_probe(struct i2c_client *i2c,
	65	const struct i2c_device_id *id)
	66	{
	67	struct max77693_dev *max77693;
d0540f91	68	unsigned int reg_data;
83871c00 CC	69	int ret = 0;
	70
	71	max77693 = devm_kzalloc(&i2c->dev,
	72	sizeof(struct max77693_dev), GFP_KERNEL);
	73	if (max77693 == NULL)
	74	return -ENOMEM;
	75
83871c00 CC	76	i2c_set_clientdata(i2c, max77693);
	77	max77693->dev = &i2c->dev;
	78	max77693->i2c = i2c;
	79	max77693->irq = i2c->irq;
	80	max77693->type = id->driver_data;
	81
2429d863 AL	82	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
	83	if (IS_ERR(max77693->regmap)) {
	84	ret = PTR_ERR(max77693->regmap);
	85	dev_err(max77693->dev, "failed to allocate register map: %d\n",
	86	ret);
	87	return ret;
	88	}
83871c00	89
d0540f91	90	ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
2429d863 AL	91	&reg_data);
2429d863 AL	92	if (ret < 0) {
83871c00	93	dev_err(max77693->dev, "device not found on this channel\n");
2429d863	94	return ret;
83871c00 CC	95	} else
	96	dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
	97
	98	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
ad09dd6a KK	99	if (!max77693->muic) {
	100	dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
	101	return -ENODEV;
	102	}
83871c00 CC	103	i2c_set_clientdata(max77693->muic, max77693);
	104
	105	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
ad09dd6a KK	106	if (!max77693->haptic) {
	107	dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
	108	ret = -ENODEV;
	109	goto err_i2c_haptic;
	110	}
83871c00 CC	111	i2c_set_clientdata(max77693->haptic, max77693);
83871c00 CC	112
b186b124 CC	113	/*
	114	* Initialize register map for MUIC device because use regmap-muic
	115	* instance of MUIC device when irq of max77693 is initialized
	116	* before call max77693-muic probe() function.
	117	*/
	118	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
75ad1327	119	&max77693_regmap_muic_config);
b186b124 CC	120	if (IS_ERR(max77693->regmap_muic)) {
	121	ret = PTR_ERR(max77693->regmap_muic);
	122	dev_err(max77693->dev,
	123	"failed to allocate register map: %d\n", ret);
2429d863	124	goto err_regmap_muic;
b186b124 CC	125	}
b186b124 CC	126
6592ebb3 CC	127	ret = max77693_irq_init(max77693);
6592ebb3 CC	128	if (ret < 0)
ff2b7ac6	129	goto err_irq;
6592ebb3	130
83871c00 CC	131	pm_runtime_set_active(max77693->dev);
	132
	133	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
0848c94f	134	ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
83871c00 CC	135	if (ret < 0)
	136	goto err_mfd;
	137
	138	return ret;
	139
	140	err_mfd:
ff2b7ac6 AL	141	max77693_irq_exit(max77693);
ff2b7ac6 AL	142	err_irq:
2429d863	143	err_regmap_muic:
83871c00	144	i2c_unregister_device(max77693->haptic);
ad09dd6a KK	145	err_i2c_haptic:
ad09dd6a KK	146	i2c_unregister_device(max77693->muic);
83871c00 CC	147	return ret;
	148	}
	149
	150	static int max77693_i2c_remove(struct i2c_client *i2c)
	151	{
	152	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	153
	154	mfd_remove_devices(max77693->dev);
ff2b7ac6	155	max77693_irq_exit(max77693);
83871c00 CC	156	i2c_unregister_device(max77693->muic);
	157	i2c_unregister_device(max77693->haptic);
	158
	159	return 0;
	160	}
	161
	162	static const struct i2c_device_id max77693_i2c_id[] = {
	163	{ "max77693", TYPE_MAX77693 },
	164	{ }
	165	};
	166	MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
	167
6592ebb3 CC	168	static int max77693_suspend(struct device *dev)
	169	{
	170	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	171	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	172
	173	if (device_may_wakeup(dev))
	174	irq_set_irq_wake(max77693->irq, 1);
	175	return 0;
	176	}
	177
	178	static int max77693_resume(struct device *dev)
	179	{
	180	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	181	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
	182
	183	if (device_may_wakeup(dev))
	184	irq_set_irq_wake(max77693->irq, 0);
	185	return max77693_irq_resume(max77693);
	186	}
	187
12477a32	188	static const struct dev_pm_ops max77693_pm = {
6592ebb3 CC	189	.suspend = max77693_suspend,
	190	.resume = max77693_resume,
	191	};
	192
4657185c	193	#ifdef CONFIG_OF
5ce9a55b	194	static const struct of_device_id max77693_dt_match[] = {
4657185c AH	195	{ .compatible = "maxim,max77693" },
	196	{},
	197	};
	198	#endif
	199
83871c00 CC	200	static struct i2c_driver max77693_i2c_driver = {
	201	.driver = {
	202	.name = "max77693",
	203	.owner = THIS_MODULE,
6592ebb3	204	.pm = &max77693_pm,
4657185c	205	.of_match_table = of_match_ptr(max77693_dt_match),
83871c00 CC	206	},
	207	.probe = max77693_i2c_probe,
	208	.remove = max77693_i2c_remove,
	209	.id_table = max77693_i2c_id,
	210	};
	211
	212	static int __init max77693_i2c_init(void)
	213	{
	214	return i2c_add_driver(&max77693_i2c_driver);
	215	}
	216	/* init early so consumer devices can complete system boot */
	217	subsys_initcall(max77693_i2c_init);
	218
	219	static void __exit max77693_i2c_exit(void)
	220	{
	221	i2c_del_driver(&max77693_i2c_driver);
	222	}
	223	module_exit(max77693_i2c_exit);
	224
	225	MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
	226	MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
	227	MODULE_LICENSE("GPL");