mirror of https://gitee.com/openkylin/linux.git
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*
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* Driver for ADAU1381/ADAU1781 CODEC
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*
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* Copyright 2014 Analog Devices Inc.
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* Author: Lars-Peter Clausen <lars@metafoo.de>
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*
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* Licensed under the GPL-2.
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*/
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include <sound/soc.h>
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#include "adau1781.h"
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static void adau1781_spi_switch_mode(struct device *dev)
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{
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struct spi_device *spi = to_spi_device(dev);
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/*
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* To get the device into SPI mode CLATCH has to be pulled low three
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* times. Do this by issuing three dummy reads.
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*/
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spi_w8r8(spi, 0x00);
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spi_w8r8(spi, 0x00);
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spi_w8r8(spi, 0x00);
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}
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static int adau1781_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 regmap_config config;
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if (!id)
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return -EINVAL;
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config = adau1781_regmap_config;
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config.val_bits = 8;
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config.reg_bits = 24;
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config.read_flag_mask = 0x1;
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return adau1781_probe(&spi->dev,
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devm_regmap_init_spi(spi, &config),
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id->driver_data, adau1781_spi_switch_mode);
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}
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static int adau1781_spi_remove(struct spi_device *spi)
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{
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snd_soc_unregister_codec(&spi->dev);
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return 0;
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}
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static const struct spi_device_id adau1781_spi_id[] = {
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{ "adau1381", ADAU1381 },
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{ "adau1781", ADAU1781 },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, adau1781_spi_id);
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#if defined(CONFIG_OF)
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static const struct of_device_id adau1781_spi_dt_ids[] = {
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{ .compatible = "adi,adau1381", },
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{ .compatible = "adi,adau1781", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, adau1781_spi_dt_ids);
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#endif
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static struct spi_driver adau1781_spi_driver = {
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.driver = {
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.name = "adau1781",
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.of_match_table = of_match_ptr(adau1781_spi_dt_ids),
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},
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.probe = adau1781_spi_probe,
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.remove = adau1781_spi_remove,
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.id_table = adau1781_spi_id,
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};
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module_spi_driver(adau1781_spi_driver);
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MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC SPI driver");
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_LICENSE("GPL");
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