1 // SPDX-License-Identifier: GPL-2.0-only
3 * I2C bus interface to Cirrus Logic Madera codecs
5 * Copyright (C) 2015-2018 Cirrus Logic
8 #include <linux/device.h>
10 #include <linux/i2c.h>
11 #include <linux/module.h>
13 #include <linux/regmap.h>
15 #include <linux/mfd/madera/core.h>
19 static int madera_i2c_probe(struct i2c_client *i2c)
21 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
22 struct madera *madera;
23 const struct regmap_config *regmap_16bit_config = NULL;
24 const struct regmap_config *regmap_32bit_config = NULL;
30 of_data = of_device_get_match_data(&i2c->dev);
32 type = (unsigned long)of_data;
34 type = id->driver_data;
38 if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
39 regmap_16bit_config = &cs47l15_16bit_i2c_regmap;
40 regmap_32bit_config = &cs47l15_32bit_i2c_regmap;
44 if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
45 regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
46 regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
51 if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
52 regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
53 regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
58 if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
59 regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
60 regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
66 if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
67 regmap_16bit_config = &cs47l92_16bit_i2c_regmap;
68 regmap_32bit_config = &cs47l92_32bit_i2c_regmap;
73 "Unknown Madera I2C device type %ld\n", type);
77 name = madera_name_from_type(type);
79 if (!regmap_16bit_config) {
80 /* it's polite to say which codec isn't built into the kernel */
82 "Kernel does not include support for %s\n", name);
86 madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
90 madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
91 if (IS_ERR(madera->regmap)) {
92 ret = PTR_ERR(madera->regmap);
94 "Failed to allocate 16-bit register map: %d\n", ret);
98 madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
99 if (IS_ERR(madera->regmap_32bit)) {
100 ret = PTR_ERR(madera->regmap_32bit);
102 "Failed to allocate 32-bit register map: %d\n", ret);
107 madera->type_name = name;
108 madera->dev = &i2c->dev;
109 madera->irq = i2c->irq;
111 return madera_dev_init(madera);
114 static void madera_i2c_remove(struct i2c_client *i2c)
116 struct madera *madera = dev_get_drvdata(&i2c->dev);
118 madera_dev_exit(madera);
121 static const struct i2c_device_id madera_i2c_id[] = {
122 { "cs47l15", CS47L15 },
123 { "cs47l35", CS47L35 },
124 { "cs47l85", CS47L85 },
125 { "cs47l90", CS47L90 },
126 { "cs47l91", CS47L91 },
127 { "cs42l92", CS42L92 },
128 { "cs47l92", CS47L92 },
129 { "cs47l93", CS47L93 },
130 { "wm1840", WM1840 },
133 MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
135 static struct i2c_driver madera_i2c_driver = {
138 .pm = &madera_pm_ops,
139 .of_match_table = of_match_ptr(madera_of_match),
141 .probe = madera_i2c_probe,
142 .remove = madera_i2c_remove,
143 .id_table = madera_i2c_id,
146 module_i2c_driver(madera_i2c_driver);
148 MODULE_DESCRIPTION("Madera I2C bus interface");
149 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
150 MODULE_LICENSE("GPL v2");