ASoC: simple-card-utils: add asoc_simple_card_parse_dai()

simple-card needs to get its dai name and endpoint node.
This patch makes it simple style standard
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/simple_card_utils.h

@@ -41,4 +41,21 @@ int asoc_simple_card_parse_clk(struct device_node *node,
 			       struct device_node *dai_of_node,
 			       struct asoc_simple_dai *simple_dai);
 
+#define asoc_simple_card_parse_cpu(node, dai_link,				\
+				   list_name, cells_name, is_single_link)	\
+	asoc_simple_card_parse_dai(node, &dai_link->cpu_of_node,		\
+		&dai_link->cpu_dai_name, list_name, cells_name, is_single_link)
+#define asoc_simple_card_parse_codec(node, dai_link, list_name, cells_name)	\
+	asoc_simple_card_parse_dai(node, &dai_link->codec_of_node,		\
+		&dai_link->codec_dai_name, list_name, cells_name, NULL)
+#define asoc_simple_card_parse_platform(node, dai_link, list_name, cells_name)	\
+	asoc_simple_card_parse_dai(node, &dai_link->platform_of_node,		\
+		NULL, list_name, cells_name, NULL)
+int asoc_simple_card_parse_dai(struct device_node *node,
+				  struct device_node **endpoint_np,
+				  const char **dai_name,
+				  const char *list_name,
+				  const char *cells_name,
+				  int *is_single_links);
+
 #endif /* __SIMPLE_CARD_CORE_H */

sound/soc/generic/simple-card-utils.c

@@ -127,6 +127,43 @@ int asoc_simple_card_parse_clk(struct device_node *node,
 }
 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);
 
+int asoc_simple_card_parse_dai(struct device_node *node,
+				    struct device_node **dai_of_node,
+				    const char **dai_name,
+				    const char *list_name,
+				    const char *cells_name,
+				    int *is_single_link)
+{
+	struct of_phandle_args args;
+	int ret;
+
+	if (!node)
+		return 0;
+
+	/*
+	 * Get node via "sound-dai = <&phandle port>"
+	 * it will be used as xxx_of_node on soc_bind_dai_link()
+	 */
+	ret = of_parse_phandle_with_args(node, list_name, cells_name, 0, &args);
+	if (ret)
+		return ret;
+
+	/* Get dai->name */
+	if (dai_name) {
+		ret = snd_soc_of_get_dai_name(node, dai_name);
+		if (ret < 0)
+			return ret;
+	}
+
+	*dai_of_node = args.np;
+
+	if (is_single_link)
+		*is_single_link = !args.args_count;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);
+
 /* Module information */
 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");