ASoC: pxa: add DT bindings for pxa2xx-pcm

The bindings do not carry any resources, as the module only registers
the ASoC platform driver.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

2 files changed, 26 insertions, 2 deletions

diff --git a/Documentation/devicetree/bindings/sound/mrvl,pxa2xx-pcm.txt b/Documentation/devicetree/bindings/sound/mrvl,pxa2xx-pcm.txt
new file mode 100644
index 000000000000..551fbb8348c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/mrvl,pxa2xx-pcm.txt
@@ -0,0 +1,15 @@
+DT bindings for ARM PXA2xx PCM platform driver
+
+This is just a dummy driver that registers the PXA ASoC platform driver.
+It does not have any resources assigned.
+
+Required properties:
+
+        - compatible            'mrvl,pxa-pcm-audio'
+
+Example:
+
+        pxa_pcm_audio: snd_soc_pxa_audio {
+                compatible = "mrvl,pxa-pcm-audio";
+        };
+
diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index 0aa2d695064a..806da27b8b67 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -13,6 +13,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/dmaengine.h>
+#include <linux/of.h>
 
 #include <sound/core.h>
 #include <sound/soc.h>
@@ -133,10 +134,18 @@ static int pxa2xx_soc_platform_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id snd_soc_pxa_audio_match[] = {
+        { .compatible   = "mrvl,pxa-pcm-audio" },
+        { }
+};
+#endif
+
 static struct platform_driver pxa_pcm_driver = {
         .driver = {
-                        .name = "pxa-pcm-audio",
-                        .owner = THIS_MODULE,
+                .name = "pxa-pcm-audio",
+                .owner = THIS_MODULE,
+                .of_match_table = of_match_ptr(snd_soc_pxa_audio_match),
         },
 
         .probe = pxa2xx_soc_platform_probe,