152 строки
3.6 KiB
C
152 строки
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* I2C bus interface to Cirrus Logic Madera codecs
|
|
*
|
|
* Copyright (C) 2015-2018 Cirrus Logic
|
|
*/
|
|
|
|
#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 void madera_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct madera *madera = dev_get_drvdata(&i2c->dev);
|
|
|
|
madera_dev_exit(madera);
|
|
}
|
|
|
|
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");
|