[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mfd / tps65910.c

/*
 * tps65910.c  --  TI TPS6591x
 *
 * Copyright 2010 Texas Instruments Inc.
 *
 * Author: Graeme Gregory <gg@slimlogic.co.uk>
 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
 *
 *  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/slab.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65910.h>

static struct mfd_cell tps65910s[] = {
	{
		.name = "tps65910-pmic",
	},
	{
		.name = "tps65910-rtc",
	},
	{
		.name = "tps65910-power",
	},
};


static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
				  int bytes, void *dest)
{
	struct i2c_client *i2c = tps65910->i2c_client;
	struct i2c_msg xfer[2];
	int ret;

	/* Write register */
	xfer[0].addr = i2c->addr;
	xfer[0].flags = 0;
	xfer[0].len = 1;
	xfer[0].buf = &reg;

	/* Read data */
	xfer[1].addr = i2c->addr;
	xfer[1].flags = I2C_M_RD;
	xfer[1].len = bytes;
	xfer[1].buf = dest;

	ret = i2c_transfer(i2c->adapter, xfer, 2);
	if (ret == 2)
		ret = 0;
	else if (ret >= 0)
		ret = -EIO;

	return ret;
}

static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
				   int bytes, void *src)
{
	struct i2c_client *i2c = tps65910->i2c_client;
	/* we add 1 byte for device register */
	u8 msg[TPS65910_MAX_REGISTER + 1];
	int ret;

	if (bytes > TPS65910_MAX_REGISTER)
		return -EINVAL;

	msg[0] = reg;
	memcpy(&msg[1], src, bytes);

	ret = i2c_master_send(i2c, msg, bytes + 1);
	if (ret < 0)
		return ret;
	if (ret != bytes + 1)
		return -EIO;
	return 0;
}

int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
{
	u8 data;
	int err;

	mutex_lock(&tps65910->io_mutex);
	err = tps65910_i2c_read(tps65910, reg, 1, &data);
	if (err) {
		dev_err(tps65910->dev, "read from reg %x failed\n", reg);
		goto out;
	}

	data |= mask;
	err = tps65910_i2c_write(tps65910, reg, 1, &data);
	if (err)
		dev_err(tps65910->dev, "write to reg %x failed\n", reg);

out:
	mutex_unlock(&tps65910->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65910_set_bits);

int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
{
	u8 data;
	int err;

	mutex_lock(&tps65910->io_mutex);
	err = tps65910_i2c_read(tps65910, reg, 1, &data);
	if (err) {
		dev_err(tps65910->dev, "read from reg %x failed\n", reg);
		goto out;
	}

	data &= mask;
	err = tps65910_i2c_write(tps65910, reg, 1, &data);
	if (err)
		dev_err(tps65910->dev, "write to reg %x failed\n", reg);

out:
	mutex_unlock(&tps65910->io_mutex);
	return err;
}
EXPORT_SYMBOL_GPL(tps65910_clear_bits);

static int tps65910_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct tps65910 *tps65910;
	struct tps65910_board *pmic_plat_data;
	struct tps65910_platform_data *init_data;
	int ret = 0;

	pmic_plat_data = dev_get_platdata(&i2c->dev);
	if (!pmic_plat_data)
		return -EINVAL;

	init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
	if (init_data == NULL)
		return -ENOMEM;

	init_data->irq = pmic_plat_data->irq;
	init_data->irq_base = pmic_plat_data->irq;

	tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
	if (tps65910 == NULL) {
		kfree(init_data);
		return -ENOMEM;
	}

	i2c_set_clientdata(i2c, tps65910);
	tps65910->dev = &i2c->dev;
	tps65910->i2c_client = i2c;
	tps65910->id = id->driver_data;
	tps65910->read = tps65910_i2c_read;
	tps65910->write = tps65910_i2c_write;
	mutex_init(&tps65910->io_mutex);

	ret = mfd_add_devices(tps65910->dev, -1,
			      tps65910s, ARRAY_SIZE(tps65910s),
			      NULL, 0);
	if (ret < 0)
		goto err;

	tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);

	ret = tps65910_irq_init(tps65910, init_data->irq, init_data);
	if (ret < 0)
		goto err;

	kfree(init_data);
	return ret;

err:
	mfd_remove_devices(tps65910->dev);
	kfree(tps65910);
	kfree(init_data);
	return ret;
}

static int tps65910_i2c_remove(struct i2c_client *i2c)
{
	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);

	mfd_remove_devices(tps65910->dev);
	tps65910_irq_exit(tps65910);
	kfree(tps65910);

	return 0;
}

static const struct i2c_device_id tps65910_i2c_id[] = {
       { "tps65910", TPS65910 },
       { "tps65911", TPS65911 },
       { }
};
MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);


static struct i2c_driver tps65910_i2c_driver = {
	.driver = {
		   .name = "tps65910",
		   .owner = THIS_MODULE,
	},
	.probe = tps65910_i2c_probe,
	.remove = tps65910_i2c_remove,
	.id_table = tps65910_i2c_id,
};

static int __init tps65910_i2c_init(void)
{
	return i2c_add_driver(&tps65910_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(tps65910_i2c_init);

static void __exit tps65910_i2c_exit(void)
{
	i2c_del_driver(&tps65910_i2c_driver);
}
module_exit(tps65910_i2c_exit);

MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
27c6750e GG	1	/*
	2	* tps65910.c -- TI TPS6591x
	3	*
	4	* Copyright 2010 Texas Instruments Inc.
	5	*
	6	* Author: Graeme Gregory <gg@slimlogic.co.uk>
	7	* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/moduleparam.h>
	18	#include <linux/init.h>
	19	#include <linux/slab.h>
	20	#include <linux/i2c.h>
	21	#include <linux/gpio.h>
	22	#include <linux/mfd/core.h>
	23	#include <linux/mfd/tps65910.h>
	24
	25	static struct mfd_cell tps65910s[] = {
	26	{
	27	.name = "tps65910-pmic",
	28	},
	29	{
	30	.name = "tps65910-rtc",
	31	},
	32	{
	33	.name = "tps65910-power",
	34	},
	35	};
	36
	37
	38	static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
	39	int bytes, void *dest)
	40	{
	41	struct i2c_client *i2c = tps65910->i2c_client;
	42	struct i2c_msg xfer[2];
	43	int ret;
	44
	45	/* Write register */
	46	xfer[0].addr = i2c->addr;
	47	xfer[0].flags = 0;
	48	xfer[0].len = 1;
	49	xfer[0].buf = ®
	50
	51	/* Read data */
	52	xfer[1].addr = i2c->addr;
	53	xfer[1].flags = I2C_M_RD;
	54	xfer[1].len = bytes;
	55	xfer[1].buf = dest;
	56
	57	ret = i2c_transfer(i2c->adapter, xfer, 2);
	58	if (ret == 2)
	59	ret = 0;
	60	else if (ret >= 0)
	61	ret = -EIO;
	62
	63	return ret;
	64	}
65
66	static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
67	int bytes, void *src)
68	{
69	struct i2c_client *i2c = tps65910->i2c_client;
70	/* we add 1 byte for device register */
71	u8 msg[TPS65910_MAX_REGISTER + 1];
72	int ret;
73
0514e9ac	74	if (bytes > TPS65910_MAX_REGISTER)
27c6750e GG	75	return -EINVAL;
	76
	77	msg[0] = reg;
	78	memcpy(&msg[1], src, bytes);
	79
	80	ret = i2c_master_send(i2c, msg, bytes + 1);
	81	if (ret < 0)
	82	return ret;
	83	if (ret != bytes + 1)
	84	return -EIO;
	85	return 0;
	86	}
	87
	88	int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
	89	{
	90	u8 data;
	91	int err;
	92
	93	mutex_lock(&tps65910->io_mutex);
	94	err = tps65910_i2c_read(tps65910, reg, 1, &data);
	95	if (err) {
	96	dev_err(tps65910->dev, "read from reg %x failed\n", reg);
	97	goto out;
	98	}
	99
	100	data \|= mask;
	101	err = tps65910_i2c_write(tps65910, reg, 1, &data);
	102	if (err)
	103	dev_err(tps65910->dev, "write to reg %x failed\n", reg);
	104
	105	out:
	106	mutex_unlock(&tps65910->io_mutex);
	107	return err;
	108	}
	109	EXPORT_SYMBOL_GPL(tps65910_set_bits);
	110
	111	int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
	112	{
	113	u8 data;
	114	int err;
	115
	116	mutex_lock(&tps65910->io_mutex);
	117	err = tps65910_i2c_read(tps65910, reg, 1, &data);
	118	if (err) {
	119	dev_err(tps65910->dev, "read from reg %x failed\n", reg);
	120	goto out;
	121	}
	122
	123	data &= mask;
	124	err = tps65910_i2c_write(tps65910, reg, 1, &data);
	125	if (err)
	126	dev_err(tps65910->dev, "write to reg %x failed\n", reg);
	127
	128	out:
	129	mutex_unlock(&tps65910->io_mutex);
	130	return err;
	131	}
	132	EXPORT_SYMBOL_GPL(tps65910_clear_bits);
	133
	134	static int tps65910_i2c_probe(struct i2c_client *i2c,
	135	const struct i2c_device_id *id)
	136	{
	137	struct tps65910 *tps65910;
2537df72	138	struct tps65910_board *pmic_plat_data;
e3471bdc	139	struct tps65910_platform_data *init_data;
27c6750e GG	140	int ret = 0;
27c6750e GG	141
2537df72 GG	142	pmic_plat_data = dev_get_platdata(&i2c->dev);
	143	if (!pmic_plat_data)
	144	return -EINVAL;
	145
e3471bdc GG	146	init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
	147	if (init_data == NULL)
	148	return -ENOMEM;
	149
	150	init_data->irq = pmic_plat_data->irq;
	151	init_data->irq_base = pmic_plat_data->irq;
	152
27c6750e	153	tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
dc7e412d JJ	154	if (tps65910 == NULL) {
dc7e412d JJ	155	kfree(init_data);
27c6750e	156	return -ENOMEM;
dc7e412d	157	}
27c6750e GG	158
	159	i2c_set_clientdata(i2c, tps65910);
	160	tps65910->dev = &i2c->dev;
	161	tps65910->i2c_client = i2c;
79557056	162	tps65910->id = id->driver_data;
27c6750e GG	163	tps65910->read = tps65910_i2c_read;
	164	tps65910->write = tps65910_i2c_write;
	165	mutex_init(&tps65910->io_mutex);
	166
	167	ret = mfd_add_devices(tps65910->dev, -1,
	168	tps65910s, ARRAY_SIZE(tps65910s),
	169	NULL, 0);
	170	if (ret < 0)
	171	goto err;
	172
2537df72 GG	173	tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
2537df72 GG	174
e3471bdc GG	175	ret = tps65910_irq_init(tps65910, init_data->irq, init_data);
	176	if (ret < 0)
	177	goto err;
	178
dc7e412d	179	kfree(init_data);
27c6750e GG	180	return ret;
	181
	182	err:
	183	mfd_remove_devices(tps65910->dev);
	184	kfree(tps65910);
dc7e412d	185	kfree(init_data);
27c6750e GG	186	return ret;
	187	}
	188
	189	static int tps65910_i2c_remove(struct i2c_client *i2c)
	190	{
	191	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
	192
	193	mfd_remove_devices(tps65910->dev);
ec2328c3	194	tps65910_irq_exit(tps65910);
27c6750e GG	195	kfree(tps65910);
	196
	197	return 0;
	198	}
	199
	200	static const struct i2c_device_id tps65910_i2c_id[] = {
79557056 JEC	201	{ "tps65910", TPS65910 },
79557056 JEC	202	{ "tps65911", TPS65911 },
27c6750e GG	203	{ }
	204	};
	205	MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
	206
	207
	208	static struct i2c_driver tps65910_i2c_driver = {
	209	.driver = {
	210	.name = "tps65910",
	211	.owner = THIS_MODULE,
	212	},
	213	.probe = tps65910_i2c_probe,
	214	.remove = tps65910_i2c_remove,
	215	.id_table = tps65910_i2c_id,
	216	};
	217
	218	static int __init tps65910_i2c_init(void)
	219	{
	220	return i2c_add_driver(&tps65910_i2c_driver);
	221	}
	222	/* init early so consumer devices can complete system boot */
	223	subsys_initcall(tps65910_i2c_init);
	224
	225	static void __exit tps65910_i2c_exit(void)
	226	{
	227	i2c_del_driver(&tps65910_i2c_driver);
	228	}
	229	module_exit(tps65910_i2c_exit);
	230
	231	MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
	232	MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
	233	MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
	234	MODULE_LICENSE("GPL");