ASoC: simple-card: support platform in dts parse

Support platform in dts parse so that dma pcm component
can be added in dts.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 33feee9..c87e585 100644 (file)
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -307,6 +307,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
        struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
        struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
        struct device_node *cpu = NULL;
+       struct device_node *plat = NULL;
        struct device_node *codec = NULL;
        char *name;
        char prop[128];
@@ -320,6 +321,9 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
        snprintf(prop, sizeof(prop), "%scpu", prefix);
        cpu = of_get_child_by_name(node, prop);
 
+       snprintf(prop, sizeof(prop), "%splat", prefix);
+       plat = of_get_child_by_name(node, prop);
+
        snprintf(prop, sizeof(prop), "%scodec", prefix);
        codec = of_get_child_by_name(node, prop);
 
@@ -352,8 +356,16 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
                goto dai_link_of_err;
        }
 
-       /* Simple Card assumes platform == cpu */
-       dai_link->platform_of_node = dai_link->cpu_of_node;
+       if (plat) {
+               struct of_phandle_args args;
+
+               ret = of_parse_phandle_with_args(plat, "sound-dai",
+                                                "#sound-dai-cells", 0, &args);
+               dai_link->platform_of_node = args.np;
+       } else {
+               /* Assumes platform == cpu */
+               dai_link->platform_of_node = dai_link->cpu_of_node;
+       }
 
        /* DAI link name is created from CPU/CODEC dai name */
        name = devm_kzalloc(dev,