ASoC: Add device tree binding for WM8731

Tested with the famous "hey, look! this compiles" test plan.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Acked by: Grant Likely <grant.likely@secretlab.ca>

diff --git a/Documentation/devicetree/bindings/sound/wm8731.txt b/Documentation/devicetree/bindings/sound/wm8731.txt
new file mode 100644 (file)
index 0000000..15f7004
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/wm8731.txt
@@ -0,0 +1,18 @@
+WM8731 audio CODEC
+
+This device supports both I2C and SPI (configured with pin strapping
+on the board).
+
+Required properties:
+
+  - compatible : "wlf,wm8731"
+
+  - reg : the I2C address of the device for I2C, the chip select
+          number for SPI.
+
+Example:
+
+codec: wm8731@1a {
+       compatible = "wlf,wm8731";
+       reg = <0x1a>;
+};

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index 76b4361..f76b6fc 100644 (file)
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
+#include <linux/of_device.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -607,6 +608,13 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
        .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 };
 
+static const struct of_device_id wm8731_of_match[] = {
+       { .compatible = "wlf,wm8731", },
+       { }
+};
+
+MODULE_DEVICE_TABLE(of, wm8731_of_match);
+
 #if defined(CONFIG_SPI_MASTER)
 static int __devinit wm8731_spi_probe(struct spi_device *spi)
 {
@@ -638,6 +646,7 @@ static struct spi_driver wm8731_spi_driver = {
        .driver = {
                .name   = "wm8731",
                .owner  = THIS_MODULE,
+               .of_match_table = wm8731_of_match,
        },
        .probe          = wm8731_spi_probe,
        .remove         = __devexit_p(wm8731_spi_remove),
@@ -682,6 +691,7 @@ static struct i2c_driver wm8731_i2c_driver = {
        .driver = {
                .name = "wm8731",
                .owner = THIS_MODULE,
+               .of_match_table = wm8731_of_match,
        },
        .probe =    wm8731_i2c_probe,
        .remove =   __devexit_p(wm8731_i2c_remove),