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ALSA: ASoC: Add WM8510 SPI support

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Implement SPI support for WM8510, 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 2008-10-07 11:56:20 +01:00 committed by Takashi Iwai
parent dd0c0c805d
commit 5e357952b1
2 changed files with 69 additions and 2 deletions
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70
sound/soc/codecs/wm8510.c
View file

@ -18,6 +18,7 @@
#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>
@ -747,6 +748,62 @@ err_driver:
}
#endif
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8510_spi_probe(struct spi_device *spi)
{
struct snd_soc_device *socdev = wm8510_socdev;
struct snd_soc_codec *codec = socdev->codec;
int ret;
codec->control_data = spi;
ret = wm8510_init(socdev);
if (ret < 0)
dev_err(&spi->dev, "failed to initialise WM8510\n");
return ret;
}
static int __devexit wm8510_spi_remove(struct spi_device *spi)
{
return 0;
}
static struct spi_driver wm8510_spi_driver = {
.driver = {
.name = "wm8510",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wm8510_spi_probe,
.remove = __devexit_p(wm8510_spi_remove),
};
static int wm8510_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 /* CONFIG_SPI_MASTER */
static int wm8510_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@ -772,8 +829,14 @@ static int wm8510_probe(struct platform_device *pdev)
codec->hw_write = (hw_write_t)i2c_master_send;
ret = wm8510_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)wm8510_spi_write;
ret = spi_register_driver(&wm8510_spi_driver);
if (ret != 0)
printk(KERN_ERR "can't add spi driver");
}
#endif
if (ret != 0)
@ -795,6 +858,9 @@ static int wm8510_remove(struct platform_device *pdev)
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8510_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8510_spi_driver);
#endif
kfree(codec);

1
sound/soc/codecs/wm8510.h
View file

@ -94,6 +94,7 @@
#define WM8510_MCLKDIV_12 (7 << 5)
struct wm8510_setup_data {
int spi;
int i2c_bus;
unsigned short i2c_address;
};