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// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for ADAU1372 codec
*
* Copyright 2016 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
*/
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <sound/soc.h>
#include "adau1372.h"
static void adau1372_spi_switch_mode(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
/*
* To get the device into SPI mode CLATCH has to be pulled low three
* times. Do this by issuing three dummy reads.
*/
spi_w8r8(spi, 0x00);
spi_w8r8(spi, 0x00);
spi_w8r8(spi, 0x00);
}
static int adau1372_spi_probe(struct spi_device *spi)
{
struct regmap_config config;
config = adau1372_regmap_config;
config.read_flag_mask = 0x1;
return adau1372_probe(&spi->dev,
devm_regmap_init_spi(spi, &config), adau1372_spi_switch_mode);
}
static const struct spi_device_id adau1372_spi_id[] = {
{ "adau1372", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, adau1372_spi_id);
static struct spi_driver adau1372_spi_driver = {
.driver = {
.name = "adau1372",
},
.probe = adau1372_spi_probe,
.id_table = adau1372_spi_id,
};
module_spi_driver(adau1372_spi_driver);
MODULE_DESCRIPTION("ASoC ADAU1372 CODEC SPI driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL v2");
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