[linux-2.6-block.git] / drivers / mfd / madera-i2c.c

// SPDX-License-Identifier: GPL-2.0
/*
 * I2C bus interface to Cirrus Logic Madera codecs
 *
 * Copyright (C) 2015-2018 Cirrus Logic
 *
 * 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; version 2.
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>

#include <linux/mfd/madera/core.h>

#include "madera.h"

static int madera_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct madera *madera;
	const struct regmap_config *regmap_16bit_config = NULL;
	const struct regmap_config *regmap_32bit_config = NULL;
	const void *of_data;
	unsigned long type;
	const char *name;
	int ret;

	of_data = of_device_get_match_data(&i2c->dev);
	if (of_data)
		type = (unsigned long)of_data;
	else
		type = id->driver_data;

	switch (type) {
	case CS47L35:
		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
			regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
			regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
		}
		break;
	case CS47L85:
	case WM1840:
		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
			regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
			regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
		}
		break;
	case CS47L90:
	case CS47L91:
		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
			regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
			regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
		}
		break;
	default:
		dev_err(&i2c->dev,
			"Unknown Madera I2C device type %ld\n", type);
		return -EINVAL;
	}

	name = madera_name_from_type(type);

	if (!regmap_16bit_config) {
		/* it's polite to say which codec isn't built into the kernel */
		dev_err(&i2c->dev,
			"Kernel does not include support for %s\n", name);
		return -EINVAL;
	}

	madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
	if (!madera)
		return -ENOMEM;


	madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
	if (IS_ERR(madera->regmap)) {
		ret = PTR_ERR(madera->regmap);
		dev_err(&i2c->dev,
			"Failed to allocate 16-bit register map: %d\n",	ret);
		return ret;
	}

	madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
	if (IS_ERR(madera->regmap_32bit)) {
		ret = PTR_ERR(madera->regmap_32bit);
		dev_err(&i2c->dev,
			"Failed to allocate 32-bit register map: %d\n", ret);
		return ret;
	}

	madera->type = type;
	madera->type_name = name;
	madera->dev = &i2c->dev;
	madera->irq = i2c->irq;

	return madera_dev_init(madera);
}

static int madera_i2c_remove(struct i2c_client *i2c)
{
	struct madera *madera = dev_get_drvdata(&i2c->dev);

	madera_dev_exit(madera);

	return 0;
}

static const struct i2c_device_id madera_i2c_id[] = {
	{ "cs47l35", CS47L35 },
	{ "cs47l85", CS47L85 },
	{ "cs47l90", CS47L90 },
	{ "cs47l91", CS47L91 },
	{ "wm1840", WM1840 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, madera_i2c_id);

static struct i2c_driver madera_i2c_driver = {
	.driver = {
		.name	= "madera",
		.pm	= &madera_pm_ops,
		.of_match_table	= of_match_ptr(madera_of_match),
	},
	.probe		= madera_i2c_probe,
	.remove		= madera_i2c_remove,
	.id_table	= madera_i2c_id,
};

module_i2c_driver(madera_i2c_driver);

MODULE_DESCRIPTION("Madera I2C bus interface");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
16b27467 RF	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* I2C bus interface to Cirrus Logic Madera codecs
	4	*
	5	* Copyright (C) 2015-2018 Cirrus Logic
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; version 2.
	10	*/
	11
	12	#include <linux/device.h>
	13	#include <linux/err.h>
	14	#include <linux/i2c.h>
	15	#include <linux/module.h>
	16	#include <linux/of.h>
	17	#include <linux/of_device.h>
	18	#include <linux/regmap.h>
	19
	20	#include <linux/mfd/madera/core.h>
	21
	22	#include "madera.h"
	23
	24	static int madera_i2c_probe(struct i2c_client *i2c,
	25	const struct i2c_device_id *id)
	26	{
	27	struct madera *madera;
	28	const struct regmap_config *regmap_16bit_config = NULL;
	29	const struct regmap_config *regmap_32bit_config = NULL;
	30	const void *of_data;
	31	unsigned long type;
	32	const char *name;
	33	int ret;
	34
	35	of_data = of_device_get_match_data(&i2c->dev);
	36	if (of_data)
	37	type = (unsigned long)of_data;
	38	else
	39	type = id->driver_data;
	40
	41	switch (type) {
	42	case CS47L35:
	43	if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
	44	regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
	45	regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
	46	}
	47	break;
	48	case CS47L85:
	49	case WM1840:
	50	if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
	51	regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
	52	regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
	53	}
	54	break;
	55	case CS47L90:
	56	case CS47L91:
	57	if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
	58	regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
	59	regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
	60	}
	61	break;
	62	default:
	63	dev_err(&i2c->dev,
	64	"Unknown Madera I2C device type %ld\n", type);
65	return -EINVAL;
66	}
67
68	name = madera_name_from_type(type);
69
70	if (!regmap_16bit_config) {
71	/* it's polite to say which codec isn't built into the kernel */
72	dev_err(&i2c->dev,
73	"Kernel does not include support for %s\n", name);
74	return -EINVAL;
75	}
76
77	madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
78	if (!madera)
79	return -ENOMEM;
80
81
82	madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
83	if (IS_ERR(madera->regmap)) {
84	ret = PTR_ERR(madera->regmap);
85	dev_err(&i2c->dev,
86	"Failed to allocate 16-bit register map: %d\n", ret);
87	return ret;
88	}
89
90	madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
91	if (IS_ERR(madera->regmap_32bit)) {
92	ret = PTR_ERR(madera->regmap_32bit);
93	dev_err(&i2c->dev,
94	"Failed to allocate 32-bit register map: %d\n", ret);
95	return ret;
96	}
97
98	madera->type = type;
99	madera->type_name = name;
100	madera->dev = &i2c->dev;
101	madera->irq = i2c->irq;
102
103	return madera_dev_init(madera);
104	}
105
106	static int madera_i2c_remove(struct i2c_client *i2c)
107	{
108	struct madera *madera = dev_get_drvdata(&i2c->dev);
109
110	madera_dev_exit(madera);
111
112	return 0;
113	}
114
115	static const struct i2c_device_id madera_i2c_id[] = {
116	{ "cs47l35", CS47L35 },
117	{ "cs47l85", CS47L85 },
118	{ "cs47l90", CS47L90 },
119	{ "cs47l91", CS47L91 },
120	{ "wm1840", WM1840 },
121	{ }
122	};
123	MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
124
125	static struct i2c_driver madera_i2c_driver = {
126	.driver = {
127	.name = "madera",
128	.pm = &madera_pm_ops,
129	.of_match_table = of_match_ptr(madera_of_match),
130	},
131	.probe = madera_i2c_probe,
132	.remove = madera_i2c_remove,
133	.id_table = madera_i2c_id,
134	};
135
136	module_i2c_driver(madera_i2c_driver);
137
138	MODULE_DESCRIPTION("Madera I2C bus interface");
139	MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
140	MODULE_LICENSE("GPL v2");