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ALSA: ASoC: Add WM8753 SPI support

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Implement SPI support for WM8753, cut'n'pasting from the support for
WM8731 contributed by Cliff Cai and Alan Horstmann since the wire format
is the same for both codecs.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Mark Brown 2008-10-06 16:54:34 +01:00 committed by Takashi Iwai
parent df91ddf178
commit dd0c0c805d
2 changed files with 70 additions and 2 deletions
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71
sound/soc/codecs/wm8753.c
View File

@ -40,6 +40,7 @@
#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>
@ -1719,6 +1720,63 @@ err_driver:
}
#endif
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8753_spi_probe(struct spi_device *spi)
{
struct snd_soc_device *socdev = wm8753_socdev;
struct snd_soc_codec *codec = socdev->codec;
int ret;
codec->control_data = spi;
ret = wm8753_init(socdev);
if (ret < 0)
dev_err(&spi->dev, "failed to initialise WM8753\n");
return ret;
}
static int __devexit wm8753_spi_remove(struct spi_device *spi)
{
return 0;
}
static struct spi_driver wm8753_spi_driver = {
.driver = {
.name = "wm8753",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8753_spi_probe,
.remove = __devexit_p(wm8753_spi_remove),
};
static int wm8753_spi_write(struct spi_device *spi, const char *data, int len)
{
struct spi_transfer t;
struct spi_message m;
u8 msg[2];
if (len <= 0)
return 0;
msg[0] = data[0];
msg[1] = 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
static int wm8753_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@ -1753,8 +1811,14 @@ static int wm8753_probe(struct platform_device *pdev)
codec->hw_write = (hw_write_t)i2c_master_send;
ret = wm8753_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)wm8753_spi_write;
ret = spi_register_driver(&wm8753_spi_driver);
if (ret != 0)
printk(KERN_ERR "can't add spi driver");
}
#endif
if (ret != 0) {
@ -1797,6 +1861,9 @@ static int wm8753_remove(struct platform_device *pdev)
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8753_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8753_spi_driver);
#endif
kfree(codec->private_data);
kfree(codec);

1
sound/soc/codecs/wm8753.h
View File

@ -79,6 +79,7 @@
#define WM8753_ADCTL2 0x3f
struct wm8753_setup_data {
int spi;
int i2c_bus;
unsigned short i2c_address;
};