[PATCH] ASoC: simple-card: fix the DAPM routes map parsing

[Xiubo Li]

The simple-card's DAPM route maping is optional. For example, the spdif has
no need of this.

Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
---
 sound/soc/generic/simple-card.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index e86ddf5..889908a 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -145,10 +145,12 @@ 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-card,routing")) {
+		ret = snd_soc_of_parse_audio_routing(&info->snd_card,
 					"simple-audio-card,routing");
-	if (ret)
-		return ret;
+		if (ret)
+			return ret;
+	}
 
 	/* CPU sub-node */
 	ret = -EINVAL;
-- 
1.8.4


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