ASoC: soc-core.c: share code for snd_soc_of_get_dai_link_cpus/codecs()

ASoC has snd_soc_of_get_dai_link_cpus/codecs(), and these are almost same
code. The main difference are below.

	for_each_link_cpus()	dai_link->cpus		dai_link->num_cpus
	for_each_link_codecs()	dai_link->codecs	dai_link->num_codecs

Because we need to use these parameters, we can't share full-code for now,
but can share some codes.
This patch adds __snd_soc_of_get/put_xxx() functions, and share the code.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87y1xpp7ju.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-core.c

@@ -3303,6 +3303,61 @@ int snd_soc_of_get_dai_name(struct device_node *of_node,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
 
+static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
+{
+	if (component->of_node) {
+		of_node_put(component->of_node);
+		component->of_node = NULL;
+	}
+}
+
+static int __snd_soc_of_get_dai_link_component_alloc(
+	struct device *dev, struct device_node *of_node,
+	struct snd_soc_dai_link_component **ret_component,
+	int *ret_num)
+{
+	struct snd_soc_dai_link_component *component;
+	int num;
+
+	/* Count the number of CPUs/CODECs */
+	num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
+	if (num <= 0) {
+		if (num == -ENOENT)
+			dev_err(dev, "No 'sound-dai' property\n");
+		else
+			dev_err(dev, "Bad phandle in 'sound-dai'\n");
+		return num;
+	}
+	component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
+	if (!component)
+		return -ENOMEM;
+
+	*ret_component	= component;
+	*ret_num	= num;
+
+	return 0;
+}
+
+static int __snd_soc_of_get_dai_link_component_parse(
+	struct device_node *of_node,
+	struct snd_soc_dai_link_component *component, int index)
+{
+	struct of_phandle_args args;
+	int ret;
+
+	ret = of_parse_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells",
+					 index, &args);
+	if (ret)
+		return ret;
+
+	ret = snd_soc_get_dai_name(&args, &component->dai_name);
+	if (ret < 0)
+		return ret;
+
+	component->of_node = args.np;
+	return 0;
+}
+
 /*
  * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
  * @dai_link: DAI link
@@ -3314,12 +3369,8 @@ void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
 	struct snd_soc_dai_link_component *component;
 	int index;
 
-	for_each_link_codecs(dai_link, index, component) {
-		if (!component->of_node)
-			break;
-		of_node_put(component->of_node);
-		component->of_node = NULL;
-	}
+	for_each_link_codecs(dai_link, index, component)
+		__snd_soc_of_put_component(component);
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
 
@@ -3341,41 +3392,19 @@ int snd_soc_of_get_dai_link_codecs(struct device *dev,
 				   struct device_node *of_node,
 				   struct snd_soc_dai_link *dai_link)
 {
-	struct of_phandle_args args;
 	struct snd_soc_dai_link_component *component;
-	char *name;
-	int index, num_codecs, ret;
-
-	/* Count the number of CODECs */
-	name = "sound-dai";
-	num_codecs = of_count_phandle_with_args(of_node, name,
-						"#sound-dai-cells");
-	if (num_codecs <= 0) {
-		if (num_codecs == -ENOENT)
-			dev_err(dev, "No 'sound-dai' property\n");
-		else
-			dev_err(dev, "Bad phandle in 'sound-dai'\n");
-		return num_codecs;
-	}
-	component = devm_kcalloc(dev,
-				 num_codecs, sizeof(*component),
-				 GFP_KERNEL);
-	if (!component)
-		return -ENOMEM;
-	dai_link->codecs = component;
-	dai_link->num_codecs = num_codecs;
+	int index, ret;
+
+	ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
+					 &dai_link->codecs, &dai_link->num_codecs);
+	if (ret < 0)
+		return ret;
 
 	/* Parse the list */
 	for_each_link_codecs(dai_link, index, component) {
-		ret = of_parse_phandle_with_args(of_node, name,
-						 "#sound-dai-cells",
-						 index, &args);
+		ret = __snd_soc_of_get_dai_link_component_parse(of_node, component, index);
 		if (ret)
 			goto err;
-		component->of_node = args.np;
-		ret = snd_soc_get_dai_name(&args, &component->dai_name);
-		if (ret < 0)
-			goto err;
 	}
 	return 0;
 err:
@@ -3397,12 +3426,8 @@ void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
 	struct snd_soc_dai_link_component *component;
 	int index;
 
-	for_each_link_cpus(dai_link, index, component) {
-		if (!component->of_node)
-			break;
-		of_node_put(component->of_node);
-		component->of_node = NULL;
-	}
+	for_each_link_cpus(dai_link, index, component)
+		__snd_soc_of_put_component(component);
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
 
@@ -3421,41 +3446,20 @@ int snd_soc_of_get_dai_link_cpus(struct device *dev,
 				 struct device_node *of_node,
 				 struct snd_soc_dai_link *dai_link)
 {
-	struct of_phandle_args args;
 	struct snd_soc_dai_link_component *component;
-	char *name;
-	int index, num_cpus, ret;
+	int index, ret;
 
 	/* Count the number of CPUs */
-	name = "sound-dai";
-	num_cpus = of_count_phandle_with_args(of_node, name,
-						"#sound-dai-cells");
-	if (num_cpus <= 0) {
-		if (num_cpus == -ENOENT)
-			dev_err(dev, "No 'sound-dai' property\n");
-		else
-			dev_err(dev, "Bad phandle in 'sound-dai'\n");
-		return num_cpus;
-	}
-	component = devm_kcalloc(dev,
-				 num_cpus, sizeof(*component),
-				 GFP_KERNEL);
-	if (!component)
-		return -ENOMEM;
-	dai_link->cpus = component;
-	dai_link->num_cpus = num_cpus;
+	ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
+					 &dai_link->cpus, &dai_link->num_cpus);
+	if (ret < 0)
+		return ret;
 
 	/* Parse the list */
 	for_each_link_cpus(dai_link, index, component) {
-		ret = of_parse_phandle_with_args(of_node, name,
-						 "#sound-dai-cells",
-						 index, &args);
+		ret = __snd_soc_of_get_dai_link_component_parse(of_node, component, index);
 		if (ret)
 			goto err;
-		component->of_node = args.np;
-		ret = snd_soc_get_dai_name(&args, &component->dai_name);
-		if (ret < 0)
-			goto err;
 	}
 	return 0;
 err: