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ALSA: ASoC: Add SPI support for WM8731 

[Modified to allow runtime selection between I2C and SPI and to select
SPI_MASTER for all codecs build so this is included. -- broonie]

Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Cliff Cai 2008-09-01 18:47:03 +01:00 committed by Jaroslav Kysela
parent e5d3fd38f9
commit d2a403553b
3 changed files with 71 additions and 2 deletions
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1
sound/soc/codecs/Kconfig
View File

@ -2,6 +2,7 @@ config SND_SOC_ALL_CODECS
tristate "Build all ASoC CODEC drivers"
depends on I2C
select SPI
select SPI_MASTER
select SND_SOC_AK4535
select SND_SOC_UDA1380
select SND_SOC_WM8510

71
sound/soc/codecs/wm8731.c
View File

@ -19,6 +19,7 @@
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@ -652,6 +653,61 @@ err_driver:
}
#endif
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8731_spi_probe(struct spi_device *spi)
{
struct snd_soc_device *socdev = wm8731_socdev;
struct snd_soc_codec *codec = socdev->codec;
int ret;
codec->control_data = spi;
ret = wm8731_init(socdev);
if (ret < 0)
dev_err(&spi->dev, "failed to initialise WM8731\n");
return ret;
}
static int __devexit wm8731_spi_remove(struct spi_device *spi)
{
return 0;
}
static struct spi_driver wm8731_spi_driver = {
.driver = {
.name = "wm8731",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8731_spi_probe,
.remove = __devexit_p(wm8731_spi_remove),
};
static int wm8731_spi_write(struct spi_device *spi, const char *data, int len)
{
struct spi_transfer t;
struct spi_message m;
u16 msg[2];
if (len <= 0)
return 0;
msg[0] = (data[0] << 8) + data[1];
spi_message_init(&m);
memset(&t, 0, (sizeof t));
t.tx_buf = &msg[0];
t.len = len;
spi_message_add_tail(&t, &m);
spi_sync(spi, &m);
return len;
}
#endif /* CONFIG_SPI_MASTER */
static int wm8731_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@ -680,13 +736,21 @@ static int wm8731_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&codec->dapm_paths);
wm8731_socdev = socdev;
ret = -ENODEV;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
if (setup->i2c_address) {
codec->hw_write = (hw_write_t)i2c_master_send;
ret = wm8731_add_i2c_device(pdev, setup);
}
#else
/* Add other interfaces here */
#endif
#if defined(CONFIG_SPI_MASTER)
if (setup->spi) {
codec->hw_write = (hw_write_t)wm8731_spi_write;
ret = spi_register_driver(&wm8731_spi_driver);
if (ret != 0)
printk(KERN_ERR "can't add spi driver");
}
#endif
if (ret != 0) {
@ -710,6 +774,9 @@ static int wm8731_remove(struct platform_device *pdev)
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8731_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8731_spi_driver);
#endif
kfree(codec->private_data);
kfree(codec);

1
sound/soc/codecs/wm8731.h
View File

@ -35,6 +35,7 @@
#define WM8731_DAI 0
struct wm8731_setup_data {
int spi;
int i2c_bus;
unsigned short i2c_address;
};