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// 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 CS47L15:
if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
regmap_16bit_config = &cs47l15_16bit_i2c_regmap;
regmap_32bit_config = &cs47l15_32bit_i2c_regmap;
}
break;
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;
case CS42L92:
case CS47L92:
case CS47L93:
if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
regmap_16bit_config = &cs47l92_16bit_i2c_regmap;
regmap_32bit_config = &cs47l92_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[] = {
{ "cs47l15", CS47L15 },
{ "cs47l35", CS47L35 },
{ "cs47l85", CS47L85 },
{ "cs47l90", CS47L90 },
{ "cs47l91", CS47L91 },
{ "cs42l92", CS42L92 },
{ "cs47l92", CS47L92 },
{ "cs47l93", CS47L93 },
{ "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");
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