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@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/wm8510.c | 70 +++++++++++++++++++++++++++++++++++++++++++-
sound/soc/codecs/wm8510.h | 1 +
2 files changed, 69 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/wm8510.c b/sound/soc/codecs/wm8510.c
index 9a37c8d..16768a5 100644
--- a/sound/soc/codecs/wm8510.c
+++ b/sound/soc/codecs/wm8510.c
@@ -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)
@@ -796,6 +859,9 @@ static int wm8510_remove(struct platform_device *pdev)
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);
return 0;
diff --git a/sound/soc/codecs/wm8510.h b/sound/soc/codecs/wm8510.h
index c536839..bdefcf5 100644
--- a/sound/soc/codecs/wm8510.h
+++ b/sound/soc/codecs/wm8510.h
@@ -94,6 +94,7 @@
#define WM8510_MCLKDIV_12 (7 << 5)
struct wm8510_setup_data {
+ int spi;
int i2c_bus;
unsigned short i2c_address;
};
--
1.5.6.5
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