1 // SPDX-License-Identifier: GPL-2.0
3 * SPI bus interface to Cirrus Logic Madera codecs
5 * Copyright (C) 2015-2018 Cirrus Logic
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.
12 #include <linux/device.h>
13 #include <linux/err.h>
14 #include <linux/module.h>
16 #include <linux/of_device.h>
17 #include <linux/regmap.h>
18 #include <linux/spi/spi.h>
20 #include <linux/mfd/madera/core.h>
24 static int madera_spi_probe(struct spi_device *spi)
26 const struct spi_device_id *id = spi_get_device_id(spi);
27 struct madera *madera;
28 const struct regmap_config *regmap_16bit_config = NULL;
29 const struct regmap_config *regmap_32bit_config = NULL;
35 of_data = of_device_get_match_data(&spi->dev);
37 type = (unsigned long)of_data;
39 type = id->driver_data;
43 if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
44 regmap_16bit_config = &cs47l35_16bit_spi_regmap;
45 regmap_32bit_config = &cs47l35_32bit_spi_regmap;
50 if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
51 regmap_16bit_config = &cs47l85_16bit_spi_regmap;
52 regmap_32bit_config = &cs47l85_32bit_spi_regmap;
57 if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
58 regmap_16bit_config = &cs47l90_16bit_spi_regmap;
59 regmap_32bit_config = &cs47l90_32bit_spi_regmap;
64 "Unknown Madera SPI device type %ld\n", type);
68 name = madera_name_from_type(type);
70 if (!regmap_16bit_config) {
71 /* it's polite to say which codec isn't built into the kernel */
73 "Kernel does not include support for %s\n", name);
77 madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
81 madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
82 if (IS_ERR(madera->regmap)) {
83 ret = PTR_ERR(madera->regmap);
85 "Failed to allocate 16-bit register map: %d\n", ret);
89 madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
90 if (IS_ERR(madera->regmap_32bit)) {
91 ret = PTR_ERR(madera->regmap_32bit);
93 "Failed to allocate 32-bit register map: %d\n", ret);
98 madera->type_name = name;
99 madera->dev = &spi->dev;
100 madera->irq = spi->irq;
102 return madera_dev_init(madera);
105 static int madera_spi_remove(struct spi_device *spi)
107 struct madera *madera = spi_get_drvdata(spi);
109 madera_dev_exit(madera);
114 static const struct spi_device_id madera_spi_ids[] = {
115 { "cs47l35", CS47L35 },
116 { "cs47l85", CS47L85 },
117 { "cs47l90", CS47L90 },
118 { "cs47l91", CS47L91 },
119 { "wm1840", WM1840 },
122 MODULE_DEVICE_TABLE(spi, madera_spi_ids);
124 static struct spi_driver madera_spi_driver = {
127 .pm = &madera_pm_ops,
128 .of_match_table = of_match_ptr(madera_of_match),
130 .probe = madera_spi_probe,
131 .remove = madera_spi_remove,
132 .id_table = madera_spi_ids,
135 module_spi_driver(madera_spi_driver);
137 MODULE_DESCRIPTION("Madera SPI bus interface");
139 MODULE_LICENSE("GPL v2");