141 lines
3.3 KiB
C
Executable file
141 lines
3.3 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* I2C bus interface to Cirrus Logic Madera codecs
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*
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* Copyright (C) 2015-2018 Cirrus Logic
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation; version 2.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/madera/core.h>
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#include "madera.h"
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static int madera_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct madera *madera;
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const struct regmap_config *regmap_16bit_config = NULL;
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const struct regmap_config *regmap_32bit_config = NULL;
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const void *of_data;
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unsigned long type;
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const char *name;
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int ret;
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of_data = of_device_get_match_data(&i2c->dev);
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if (of_data)
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type = (unsigned long)of_data;
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else
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type = id->driver_data;
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switch (type) {
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case CS47L35:
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if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
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regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
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regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
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}
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break;
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case CS47L85:
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case WM1840:
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if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
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regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
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regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
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}
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break;
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case CS47L90:
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case CS47L91:
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if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
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regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
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regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
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}
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break;
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default:
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dev_err(&i2c->dev,
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"Unknown Madera I2C device type %ld\n", type);
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return -EINVAL;
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}
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name = madera_name_from_type(type);
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if (!regmap_16bit_config) {
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/* it's polite to say which codec isn't built into the kernel */
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dev_err(&i2c->dev,
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"Kernel does not include support for %s\n", name);
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return -EINVAL;
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}
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madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
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if (!madera)
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return -ENOMEM;
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madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
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if (IS_ERR(madera->regmap)) {
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ret = PTR_ERR(madera->regmap);
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dev_err(&i2c->dev,
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"Failed to allocate 16-bit register map: %d\n", ret);
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return ret;
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}
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madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
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if (IS_ERR(madera->regmap_32bit)) {
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ret = PTR_ERR(madera->regmap_32bit);
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dev_err(&i2c->dev,
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"Failed to allocate 32-bit register map: %d\n", ret);
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return ret;
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}
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madera->type = type;
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madera->type_name = name;
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madera->dev = &i2c->dev;
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madera->irq = i2c->irq;
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return madera_dev_init(madera);
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}
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static int madera_i2c_remove(struct i2c_client *i2c)
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{
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struct madera *madera = dev_get_drvdata(&i2c->dev);
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madera_dev_exit(madera);
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return 0;
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}
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static const struct i2c_device_id madera_i2c_id[] = {
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{ "cs47l35", CS47L35 },
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{ "cs47l85", CS47L85 },
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{ "cs47l90", CS47L90 },
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{ "cs47l91", CS47L91 },
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{ "wm1840", WM1840 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
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static struct i2c_driver madera_i2c_driver = {
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.driver = {
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.name = "madera",
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.pm = &madera_pm_ops,
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.of_match_table = of_match_ptr(madera_of_match),
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},
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.probe = madera_i2c_probe,
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.remove = madera_i2c_remove,
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.id_table = madera_i2c_id,
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};
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module_i2c_driver(madera_i2c_driver);
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MODULE_DESCRIPTION("Madera I2C bus interface");
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MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
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MODULE_LICENSE("GPL v2");
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