ASoC: rsnd: add support graph base DT phase 2

To enable OF-graph base DT on rsnd driver, and to keep compatible
previous normal sound card style, it need to support both
"rcar_sound,dai" and "ports" (or "port") on DT.

This patch parses both style.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/rcar/core.c

@@ -810,45 +810,20 @@ static struct device_node *rsnd_dai_of_node(struct rsnd_priv *priv,
 	return ret;
 }
 
-static int rsnd_dai_probe(struct rsnd_priv *priv)
+static void __rsnd_dai_probe(struct rsnd_priv *priv,
+			     struct device_node *dai_np,
+			     int dai_i, int is_graph)
 {
-	struct device_node *dai_node;
-	struct device_node *dai_np;
 	struct device_node *playback, *capture;
 	struct rsnd_dai_stream *io_playback;
 	struct rsnd_dai_stream *io_capture;
-	struct snd_soc_dai_driver *rdrv, *drv;
+	struct snd_soc_dai_driver *drv;
 	struct rsnd_dai *rdai;
 	struct device *dev = rsnd_priv_to_dev(priv);
-	int nr, dai_i, io_i;
-	int is_graph;
-	int ret;
-
-	dai_node = rsnd_dai_of_node(priv, &is_graph);
-	nr = of_get_child_count(dai_node);
-	if (!nr) {
-		ret = -EINVAL;
-		goto rsnd_dai_probe_done;
-	}
-
-	rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
-	rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
-	if (!rdrv || !rdai) {
-		ret = -ENOMEM;
-		goto rsnd_dai_probe_done;
-	}
+	int io_i;
 
-	priv->rdai_nr	= nr;
-	priv->daidrv	= rdrv;
-	priv->rdai	= rdai;
-
-	/*
-	 * parse all dai
-	 */
-	dai_i = 0;
-	for_each_child_of_node(dai_node, dai_np) {
 	rdai		= rsnd_rdai_get(priv, dai_i);
-		drv		= rdrv + dai_i;
+	drv		= priv->daidrv + dai_i;
 	io_playback	= &rdai->playback;
 	io_capture	= &rdai->capture;
 
@@ -895,19 +870,53 @@ static int rsnd_dai_probe(struct rsnd_priv *priv)
 		of_node_put(capture);
 	}
 
-		dai_i++;
-
 	dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 		rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 		rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
-	}
+}
 
-	ret = 0;
+static int rsnd_dai_probe(struct rsnd_priv *priv)
+{
+	struct device_node *dai_node;
+	struct device_node *dai_np;
+	struct snd_soc_dai_driver *rdrv;
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_dai *rdai;
+	int nr;
+	int is_graph;
+	int dai_i;
 
-rsnd_dai_probe_done:
-	of_node_put(dai_node);
+	dai_node = rsnd_dai_of_node(priv, &is_graph);
+	if (is_graph)
+		nr = of_graph_get_endpoint_count(dai_node);
+	else
+		nr = of_get_child_count(dai_node);
 
-	return ret;
+	if (!nr)
+		return -EINVAL;
+
+	rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
+	rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
+	if (!rdrv || !rdai)
+		return -ENOMEM;
+
+	priv->rdai_nr	= nr;
+	priv->daidrv	= rdrv;
+	priv->rdai	= rdai;
+
+	/*
+	 * parse all dai
+	 */
+	dai_i = 0;
+	if (is_graph) {
+		for_each_endpoint_of_node(dai_node, dai_np)
+			__rsnd_dai_probe(priv, dai_np, dai_i++, is_graph);
+	} else {
+		for_each_child_of_node(dai_node, dai_np)
+			__rsnd_dai_probe(priv, dai_np, dai_i++, is_graph);
+	}
+
+	return 0;
 }
 
 /*