ASoC: utils - Add support for a dummy codec driver.

This is useful to create dummy codec devices where we need to have some
DAI links without a real Codec. e.g. could be used to represent dumb FM,
MODEM, etc

This is also used by dynamic PCM for DAI links that have no codec.

Signed-off-by: Liam Girdwood <lrg@ti.com>
[Fixed the indentation -- broonie]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c
index 4220bb0f2730..60053709e417 100644
--- a/sound/soc/soc-utils.c
+++ b/sound/soc/soc-utils.c
@@ -89,14 +89,32 @@ static struct snd_soc_platform_driver dummy_platform = {
         .ops = &dummy_dma_ops,
 };
 
+static struct snd_soc_codec_driver dummy_codec;
+static struct snd_soc_dai_driver dummy_dai = {
+        .name = "snd-soc-dummy-dai",
+};
+
 static __devinit int snd_soc_dummy_probe(struct platform_device *pdev)
 {
-        return snd_soc_register_platform(&pdev->dev, &dummy_platform);
+        int ret;
+
+        ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1);
+        if (ret < 0)
+                return ret;
+
+        ret = snd_soc_register_platform(&pdev->dev, &dummy_platform);
+        if (ret < 0) {
+                snd_soc_unregister_codec(&pdev->dev);
+                return ret;
+        }
+
+        return ret;
 }
 
 static __devexit int snd_soc_dummy_remove(struct platform_device *pdev)
 {
         snd_soc_unregister_platform(&pdev->dev);
+        snd_soc_unregister_codec(&pdev->dev);
 
         return 0;
 }