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/*
* Driver for ADAU1381/ADAU1781 CODEC
*
* Copyright 2014 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
*
* Licensed under the GPL-2.
*/
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <sound/soc.h>
#include "adau1781.h"
static void adau1781_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 adau1781_spi_probe(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
struct regmap_config config;
if (!id)
return -EINVAL;
config = adau1781_regmap_config;
config.val_bits = 8;
config.reg_bits = 24;
config.read_flag_mask = 0x1;
return adau1781_probe(&spi->dev,
devm_regmap_init_spi(spi, &config),
id->driver_data, adau1781_spi_switch_mode);
}
static int adau1781_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
return 0;
}
static const struct spi_device_id adau1781_spi_id[] = {
{ "adau1381", ADAU1381 },
{ "adau1781", ADAU1781 },
{ }
};
MODULE_DEVICE_TABLE(spi, adau1781_spi_id);
static struct spi_driver adau1781_spi_driver = {
.driver = {
.name = "adau1781",
},
.probe = adau1781_spi_probe,
.remove = adau1781_spi_remove,
.id_table = adau1781_spi_id,
};
module_spi_driver(adau1781_spi_driver);
MODULE_DESCRIPTION("ASoC ADAU1381/ADAU1781 CODEC SPI driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");
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