ASoC: simple-card: fix the DAPM routes map parsing

The simple-card's DAPM route maping is optional.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index d4402fb57253..eb95beb25d43 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -134,10 +134,12 @@ static int asoc_simple_card_parse_of(struct device_node *node,
                 (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK);
 
         /* DAPM routes */
-        ret = snd_soc_of_parse_audio_routing(&info->snd_card,
+        if (of_property_read_bool(node, "simple-audio-routing")) {
+                ret = snd_soc_of_parse_audio_routing(&info->snd_card,
                                         "simple-audio-routing");
-        if (ret)
-                return ret;
+                if (ret)
+                        return ret;
+        }
 
         /* CPU sub-node */
         ret = -EINVAL;