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16b27467f4
This adds the generic core support for Cirrus Logic "Madera" class codecs. These are complex audio codec SoCs with a variety of digital and analogue I/O, onboard audio processing and DSPs, and other features. These codecs are all based off a common set of hardware IP so can be supported by a core of common code (with a few minor device-to-device variations). Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Nikesh Oswal <Nikesh.Oswal@cirrus.com> Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
140 lines
3.3 KiB
C
140 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* SPI 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/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/spi/spi.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_spi_probe(struct spi_device *spi)
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{
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const struct spi_device_id *id = spi_get_device_id(spi);
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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(&spi->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_spi_regmap;
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regmap_32bit_config = &cs47l35_32bit_spi_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_spi_regmap;
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regmap_32bit_config = &cs47l85_32bit_spi_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_spi_regmap;
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regmap_32bit_config = &cs47l90_32bit_spi_regmap;
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}
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break;
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default:
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dev_err(&spi->dev,
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"Unknown Madera SPI 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(&spi->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(&spi->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_spi(spi, 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(&spi->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_spi(spi, 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(&spi->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 = &spi->dev;
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madera->irq = spi->irq;
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return madera_dev_init(madera);
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}
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static int madera_spi_remove(struct spi_device *spi)
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{
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struct madera *madera = spi_get_drvdata(spi);
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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 spi_device_id madera_spi_ids[] = {
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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(spi, madera_spi_ids);
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static struct spi_driver madera_spi_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_spi_probe,
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.remove = madera_spi_remove,
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.id_table = madera_spi_ids,
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};
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module_spi_driver(madera_spi_driver);
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MODULE_DESCRIPTION("Madera SPI 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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