1 files changed, 69 insertions, 1 deletions

diff --git a/sound/soc/codecs/wm8750.c b/sound/soc/codecs/wm8750.c
index 9847aa064d6b..4892e398a598 100644
--- a/sound/soc/codecs/wm8750.c
+++ b/sound/soc/codecs/wm8750.c
@@ -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>
@@ -841,7 +842,7 @@ static struct snd_soc_device *wm8750_socdev;
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 
 /*
- * WM8731 2 wire address is determined by GPIO5
+ * WM8750 2 wire address is determined by GPIO5
  * state during powerup.
  *    low  = 0x1a
  *    high = 0x1b
@@ -928,6 +929,62 @@ err_driver:
 }
 #endif
 
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8750_spi_probe(struct spi_device *spi)
+{
+        struct snd_soc_device *socdev = wm8750_socdev;
+        struct snd_soc_codec *codec = socdev->codec;
+        int ret;
+
+        codec->control_data = spi;
+
+        ret = wm8750_init(socdev);
+        if (ret < 0)
+                dev_err(&spi->dev, "failed to initialise WM8750\n");
+
+        return ret;
+}
+
+static int __devexit wm8750_spi_remove(struct spi_device *spi)
+{
+        return 0;
+}
+
+static struct spi_driver wm8750_spi_driver = {
+        .driver = {
+                .name   = "wm8750",
+                .bus    = &spi_bus_type,
+                .owner  = THIS_MODULE,
+        },
+        .probe          = wm8750_spi_probe,
+        .remove         = __devexit_p(wm8750_spi_remove),
+};
+
+static int wm8750_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 wm8750_probe(struct platform_device *pdev)
 {
         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
@@ -963,6 +1020,14 @@ static int wm8750_probe(struct platform_device *pdev)
                 ret = wm8750_add_i2c_device(pdev, setup);
         }
 #endif
+#if defined(CONFIG_SPI_MASTER)
+        if (setup->spi) {
+                codec->hw_write = (hw_write_t)wm8750_spi_write;
+                ret = spi_register_driver(&wm8750_spi_driver);
+                if (ret != 0)
+                        printk(KERN_ERR "can't add spi driver");
+        }
+#endif
 
         if (ret != 0) {
                 kfree(codec->private_data);
@@ -1005,6 +1070,9 @@ static int wm8750_remove(struct platform_device *pdev)
         i2c_unregister_device(codec->control_data);
         i2c_del_driver(&wm8750_i2c_driver);
 #endif
+#if defined(CONFIG_SPI_MASTER)
+        spi_unregister_driver(&wm8750_spi_driver);
+#endif
         kfree(codec->private_data);
         kfree(codec);