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153 lines
3.6 KiB
153 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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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#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 CS47L15: |
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if (IS_ENABLED(CONFIG_MFD_CS47L15)) { |
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regmap_16bit_config = &cs47l15_16bit_spi_regmap; |
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regmap_32bit_config = &cs47l15_32bit_spi_regmap; |
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} |
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break; |
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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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case CS42L92: |
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case CS47L92: |
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case CS47L93: |
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if (IS_ENABLED(CONFIG_MFD_CS47L92)) { |
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regmap_16bit_config = &cs47l92_16bit_spi_regmap; |
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regmap_32bit_config = &cs47l92_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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{ "cs47l15", CS47L15 }, |
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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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{ "cs42l92", CS42L92 }, |
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{ "cs47l92", CS47L92 }, |
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{ "cs47l93", CS47L93 }, |
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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 <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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