108 lines
2.6 KiB
C
Executable File
108 lines
2.6 KiB
C
Executable File
/*
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* SPI bus interface to Cirrus Logic CS35L41 codec
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*
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* Copyright 2017 Cirrus Logic
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*
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* Author: David Rhodes <david.rhodes@cirrus.com>
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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 version 2 as
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* published by the Free Software Foundation.
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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/spi/spi.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/of.h>
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#include "sound/cs35l41.h"
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#include "cs35l41.h"
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#include <linux/mfd/cs35l41/registers.h>
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static struct regmap_config cs35l41_regmap_spi = {
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.reg_bits = 32,
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.val_bits = 32,
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.pad_bits = 16,
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.reg_stride = 4,
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.reg_format_endian = REGMAP_ENDIAN_BIG,
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.val_format_endian = REGMAP_ENDIAN_BIG,
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.max_register = CS35L41_LASTREG,
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.reg_defaults = cs35l41_reg,
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.num_reg_defaults = ARRAY_SIZE(cs35l41_reg),
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.volatile_reg = cs35l41_volatile_reg,
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.readable_reg = cs35l41_readable_reg,
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct of_device_id cs35l41_of_match[] = {
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{.compatible = "cirrus,cs35l40"},
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{.compatible = "cirrus,cs35l41"},
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{},
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};
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MODULE_DEVICE_TABLE(of, cs35l41_of_match);
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static const struct spi_device_id cs35l41_id_spi[] = {
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{"cs35l40", 0},
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{"cs35l41", 0},
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{}
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};
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MODULE_DEVICE_TABLE(spi, cs35l41_id_spi);
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static int cs35l41_spi_probe(struct spi_device *spi)
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{
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const struct regmap_config *regmap_config = &cs35l41_regmap_spi;
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struct cs35l41_platform_data *pdata =
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dev_get_platdata(&spi->dev);
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struct cs35l41_data *cs35l41;
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int ret;
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cs35l41 = devm_kzalloc(&spi->dev,
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sizeof(struct cs35l41_data),
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GFP_KERNEL);
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if (cs35l41 == NULL)
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return -ENOMEM;
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spi_set_drvdata(spi, cs35l41);
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cs35l41->regmap = devm_regmap_init_spi(spi, regmap_config);
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if (IS_ERR(cs35l41->regmap)) {
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ret = PTR_ERR(cs35l41->regmap);
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dev_err(&spi->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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cs35l41->dev = &spi->dev;
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cs35l41->irq = spi->irq;
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cs35l41->pdata = pdata;
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dev_info(&spi->dev, "CS35L41 SPI MFD probe\n");
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return cs35l41_dev_init(cs35l41);
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}
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static int cs35l41_spi_remove(struct spi_device *spi)
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{
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struct cs35l41_data *cs35l41 = spi_get_drvdata(spi);
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return cs35l41_dev_exit(cs35l41);
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}
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static struct spi_driver cs35l41_spi_driver = {
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.driver = {
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.name = "cs35l41",
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.of_match_table = cs35l41_of_match,
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},
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.id_table = cs35l41_id_spi,
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.probe = cs35l41_spi_probe,
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.remove = cs35l41_spi_remove,
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};
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module_spi_driver(cs35l41_spi_driver);
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MODULE_DESCRIPTION("SPI CS35L41 driver");
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MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
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MODULE_LICENSE("GPL");
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