ASoC: Add SPI support for WM8741

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

sound/soc/codecs/wm8741.c

@@ -17,6 +17,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
+#include <linux/spi/spi.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
@@ -547,6 +548,43 @@ static struct i2c_driver wm8741_i2c_driver = {
 };
 #endif
 
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8741_spi_probe(struct spi_device *spi)
+{
+	struct wm8741_priv *wm8741;
+	int ret;
+
+	wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL);
+	if (wm8741 == NULL)
+		return -ENOMEM;
+
+	wm8741->control_type = SND_SOC_SPI;
+	spi_set_drvdata(spi, wm8741);
+
+	ret = snd_soc_register_codec(&spi->dev,
+			&soc_codec_dev_wm8741, &wm8741_dai, 1);
+	if (ret < 0)
+		kfree(wm8741);
+	return ret;
+}
+
+static int __devexit wm8741_spi_remove(struct spi_device *spi)
+{
+	snd_soc_unregister_codec(&spi->dev);
+	kfree(spi_get_drvdata(spi));
+	return 0;
+}
+
+static struct spi_driver wm8741_spi_driver = {
+	.driver = {
+		.name	= "wm8741",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= wm8741_spi_probe,
+	.remove		= __devexit_p(wm8741_spi_remove),
+};
+#endif /* CONFIG_SPI_MASTER */
+
 static int __init wm8741_modinit(void)
 {
 	int ret = 0;
@@ -556,6 +594,13 @@ static int __init wm8741_modinit(void)
 	if (ret != 0)
 		pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
 #endif
+#if defined(CONFIG_SPI_MASTER)
+	ret = spi_register_driver(&wm8741_spi_driver);
+	if (ret != 0) {
+		printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
+		       ret);
+	}
+#endif
 
 	return ret;
 }
@@ -563,6 +608,9 @@ module_init(wm8741_modinit);
 
 static void __exit wm8741_exit(void)
 {
+#if defined(CONFIG_SPI_MASTER)
+	spi_unregister_driver(&wm8741_spi_driver);
+#endif
 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 	i2c_del_driver(&wm8741_i2c_driver);
 #endif