aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMark Brown <broonie@opensource.wolfsonmicro.com>2008-10-06 16:54:34 +0100
committerTakashi Iwai <tiwai@suse.de>2008-10-13 02:17:10 +0200
commitdd0c0c805d932f34e87ee3c2db9eaee0974bfef8 (patch)
treebd7e40a000ee332903567c0fc794c0d5614b376b
parentdf91ddf178481e68b8517bed0813d032d493efa0 (diff)
ALSA: ASoC: Add WM8753 SPI support
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>
-rw-r--r--sound/soc/codecs/wm8753.c71
-rw-r--r--sound/soc/codecs/wm8753.h1
2 files changed, 70 insertions, 2 deletions
diff --git a/sound/soc/codecs/wm8753.c b/sound/soc/codecs/wm8753.c
index 8c4df44f3345..83ba4199c9c3 100644
--- a/sound/soc/codecs/wm8753.c
+++ b/sound/soc/codecs/wm8753.c
@@ -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) {
@@ -1798,6 +1862,9 @@ static int wm8753_remove(struct platform_device *pdev)
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);
diff --git a/sound/soc/codecs/wm8753.h b/sound/soc/codecs/wm8753.h
index 7defde069f1d..6678379c0a29 100644
--- a/sound/soc/codecs/wm8753.h
+++ b/sound/soc/codecs/wm8753.h
@@ -79,6 +79,7 @@
#define WM8753_ADCTL2 0x3f
struct wm8753_setup_data {
+ int spi;
int i2c_bus;
unsigned short i2c_address;
};

Privacy Policy