59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Driver for ADAU1372 codec
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*
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* Copyright 2016 Analog Devices Inc.
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* Author: Lars-Peter Clausen <lars@metafoo.de>
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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 "adau1372.h"
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static void adau1372_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 adau1372_spi_probe(struct spi_device *spi)
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{
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struct regmap_config config;
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config = adau1372_regmap_config;
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config.read_flag_mask = 0x1;
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return adau1372_probe(&spi->dev,
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devm_regmap_init_spi(spi, &config), adau1372_spi_switch_mode);
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}
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static const struct spi_device_id adau1372_spi_id[] = {
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{ "adau1372", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, adau1372_spi_id);
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static struct spi_driver adau1372_spi_driver = {
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.driver = {
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.name = "adau1372",
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},
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.probe = adau1372_spi_probe,
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.id_table = adau1372_spi_id,
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};
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module_spi_driver(adau1372_spi_driver);
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MODULE_DESCRIPTION("ASoC ADAU1372 CODEC SPI driver");
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_LICENSE("GPL v2");
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