linux-stable/sound/soc/codecs/adau1977-spi.c
Andrew F. Davis 3821a065f5 spi: Drop owner assignment from spi_drivers
An spi_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-28 10:30:17 +09:00

75 lines
1.7 KiB
C

/*
* ADAU1977/ADAU1978/ADAU1979 driver
*
* 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 "adau1977.h"
static void adau1977_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 adau1977_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 = adau1977_regmap_config;
config.val_bits = 8;
config.reg_bits = 16;
config.read_flag_mask = 0x1;
return adau1977_probe(&spi->dev,
devm_regmap_init_spi(spi, &config),
id->driver_data, adau1977_spi_switch_mode);
}
static int adau1977_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
return 0;
}
static const struct spi_device_id adau1977_spi_ids[] = {
{ "adau1977", ADAU1977 },
{ "adau1978", ADAU1978 },
{ "adau1979", ADAU1978 },
{ }
};
MODULE_DEVICE_TABLE(spi, adau1977_spi_ids);
static struct spi_driver adau1977_spi_driver = {
.driver = {
.name = "adau1977",
},
.probe = adau1977_spi_probe,
.remove = adau1977_spi_remove,
.id_table = adau1977_spi_ids,
};
module_spi_driver(adau1977_spi_driver);
MODULE_DESCRIPTION("ASoC ADAU1977/ADAU1978/ADAU1979 driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");