[mirror_ubuntu-zesty-kernel.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/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/regmap.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)
{
	return regmap_bulk_read(tps65910->regmap, reg, dest, bytes);
}

static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
				  int bytes, void *src)
{
	return regmap_bulk_write(tps65910->regmap, reg, src, bytes);
}

int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
{
	return regmap_update_bits(tps65910->regmap, reg, mask, mask);
}
EXPORT_SYMBOL_GPL(tps65910_set_bits);

int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
{
	return regmap_update_bits(tps65910->regmap, reg, mask, 0);
}
EXPORT_SYMBOL_GPL(tps65910_clear_bits);

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
	struct tps65910 *tps65910 = dev_get_drvdata(dev);

	/*
	 * Caching all regulator registers.
	 * All regualator register address range is same for
	 * TPS65910 and TPS65911
	 */
	if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
		/* Check for non-existing register */
		if (tps65910_chip_id(tps65910) == TPS65910)
			if ((reg == TPS65911_VDDCTRL_OP) ||
				(reg == TPS65911_VDDCTRL_SR))
				return true;
		return false;
	}
	return true;
}

static const struct regmap_config tps65910_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.volatile_reg = is_volatile_reg,
	.max_register = TPS65910_MAX_REGISTER,
	.num_reg_defaults_raw = TPS65910_MAX_REGISTER,
	.cache_type = REGCACHE_RBTREE,
};

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;

	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);

	tps65910->regmap = regmap_init_i2c(i2c, &tps65910_regmap_config);
	if (IS_ERR(tps65910->regmap)) {
		ret = PTR_ERR(tps65910->regmap);
		dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
		goto regmap_err;
	}

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

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

	tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);

	tps65910_irq_init(tps65910, init_data->irq, init_data);

	kfree(init_data);
	return ret;

err:
	regmap_exit(tps65910->regmap);
regmap_err:
	kfree(tps65910);
	kfree(init_data);
	return ret;
}

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

	tps65910_irq_exit(tps65910);
	mfd_remove_devices(tps65910->dev);
	regmap_exit(tps65910->regmap);
	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>
dc9913a0	19	#include <linux/err.h>
27c6750e GG	20	#include <linux/slab.h>
	21	#include <linux/i2c.h>
	22	#include <linux/gpio.h>
	23	#include <linux/mfd/core.h>
dc9913a0	24	#include <linux/regmap.h>
27c6750e GG	25	#include <linux/mfd/tps65910.h>
	26
	27	static struct mfd_cell tps65910s[] = {
	28	{
	29	.name = "tps65910-pmic",
	30	},
	31	{
	32	.name = "tps65910-rtc",
	33	},
	34	{
	35	.name = "tps65910-power",
	36	},
	37	};
	38
	39
	40	static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
	41	int bytes, void *dest)
	42	{
dc9913a0	43	return regmap_bulk_read(tps65910->regmap, reg, dest, bytes);
27c6750e GG	44	}
	45
	46	static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
dc9913a0	47	int bytes, void *src)
27c6750e	48	{
dc9913a0	49	return regmap_bulk_write(tps65910->regmap, reg, src, bytes);
27c6750e GG	50	}
	51
	52	int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
	53	{
dc9913a0	54	return regmap_update_bits(tps65910->regmap, reg, mask, mask);
27c6750e GG	55	}
	56	EXPORT_SYMBOL_GPL(tps65910_set_bits);
	57
	58	int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
	59	{
dc9913a0	60	return regmap_update_bits(tps65910->regmap, reg, mask, 0);
27c6750e GG	61	}
	62	EXPORT_SYMBOL_GPL(tps65910_clear_bits);
	63
dc9913a0 LD	64	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	65	{
	66	struct tps65910 *tps65910 = dev_get_drvdata(dev);
	67
	68	/*
	69	* Caching all regulator registers.
	70	* All regualator register address range is same for
	71	* TPS65910 and TPS65911
	72	*/
	73	if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
	74	/* Check for non-existing register */
	75	if (tps65910_chip_id(tps65910) == TPS65910)
	76	if ((reg == TPS65911_VDDCTRL_OP) \|\|
	77	(reg == TPS65911_VDDCTRL_SR))
	78	return true;
	79	return false;
	80	}
	81	return true;
	82	}
	83
39ecb037	84	static const struct regmap_config tps65910_regmap_config = {
dc9913a0 LD	85	.reg_bits = 8,
	86	.val_bits = 8,
	87	.volatile_reg = is_volatile_reg,
	88	.max_register = TPS65910_MAX_REGISTER,
	89	.num_reg_defaults_raw = TPS65910_MAX_REGISTER,
	90	.cache_type = REGCACHE_RBTREE,
	91	};
	92
27c6750e GG	93	static int tps65910_i2c_probe(struct i2c_client *i2c,
	94	const struct i2c_device_id *id)
	95	{
	96	struct tps65910 *tps65910;
2537df72	97	struct tps65910_board *pmic_plat_data;
e3471bdc	98	struct tps65910_platform_data *init_data;
27c6750e GG	99	int ret = 0;
27c6750e GG	100
2537df72 GG	101	pmic_plat_data = dev_get_platdata(&i2c->dev);
	102	if (!pmic_plat_data)
	103	return -EINVAL;
	104
e3471bdc GG	105	init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
	106	if (init_data == NULL)
	107	return -ENOMEM;
	108
27c6750e	109	tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
dc7e412d JJ	110	if (tps65910 == NULL) {
dc7e412d JJ	111	kfree(init_data);
27c6750e	112	return -ENOMEM;
dc7e412d	113	}
27c6750e GG	114
	115	i2c_set_clientdata(i2c, tps65910);
	116	tps65910->dev = &i2c->dev;
	117	tps65910->i2c_client = i2c;
79557056	118	tps65910->id = id->driver_data;
27c6750e GG	119	tps65910->read = tps65910_i2c_read;
	120	tps65910->write = tps65910_i2c_write;
	121	mutex_init(&tps65910->io_mutex);
	122
39ecb037	123	tps65910->regmap = regmap_init_i2c(i2c, &tps65910_regmap_config);
dc9913a0 LD	124	if (IS_ERR(tps65910->regmap)) {
	125	ret = PTR_ERR(tps65910->regmap);
	126	dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
	127	goto regmap_err;
	128	}
	129
27c6750e GG	130	ret = mfd_add_devices(tps65910->dev, -1,
	131	tps65910s, ARRAY_SIZE(tps65910s),
	132	NULL, 0);
	133	if (ret < 0)
	134	goto err;
	135
b1224cd1	136	init_data->irq = pmic_plat_data->irq;
1773140f	137	init_data->irq_base = pmic_plat_data->irq_base;
b1224cd1	138
2537df72 GG	139	tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
2537df72 GG	140
1e351a95	141	tps65910_irq_init(tps65910, init_data->irq, init_data);
e3471bdc	142
dc7e412d	143	kfree(init_data);
27c6750e GG	144	return ret;
	145
	146	err:
dc9913a0 LD	147	regmap_exit(tps65910->regmap);
dc9913a0 LD	148	regmap_err:
27c6750e	149	kfree(tps65910);
dc7e412d	150	kfree(init_data);
27c6750e GG	151	return ret;
	152	}
	153
	154	static int tps65910_i2c_remove(struct i2c_client *i2c)
	155	{
	156	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
	157
ec2328c3	158	tps65910_irq_exit(tps65910);
1e351a95	159	mfd_remove_devices(tps65910->dev);
dc9913a0	160	regmap_exit(tps65910->regmap);
27c6750e GG	161	kfree(tps65910);
	162
	163	return 0;
	164	}
	165
	166	static const struct i2c_device_id tps65910_i2c_id[] = {
79557056 JEC	167	{ "tps65910", TPS65910 },
79557056 JEC	168	{ "tps65911", TPS65911 },
27c6750e GG	169	{ }
	170	};
	171	MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
	172
	173
	174	static struct i2c_driver tps65910_i2c_driver = {
	175	.driver = {
	176	.name = "tps65910",
	177	.owner = THIS_MODULE,
	178	},
	179	.probe = tps65910_i2c_probe,
	180	.remove = tps65910_i2c_remove,
	181	.id_table = tps65910_i2c_id,
	182	};
	183
	184	static int __init tps65910_i2c_init(void)
	185	{
	186	return i2c_add_driver(&tps65910_i2c_driver);
	187	}
	188	/* init early so consumer devices can complete system boot */
	189	subsys_initcall(tps65910_i2c_init);
	190
	191	static void __exit tps65910_i2c_exit(void)
	192	{
	193	i2c_del_driver(&tps65910_i2c_driver);
	194	}
	195	module_exit(tps65910_i2c_exit);
	196
	197	MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
	198	MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
	199	MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
	200	MODULE_LICENSE("GPL");