[PATCH] ASoC: rsnd: Refactor port handling with helper for endpoint node selection

[Prabhakar <prabhakar.csengg@xxxxxxxxx>]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

Refactor the code responsible for selecting the correct device node for
audio endpoint parsing in the rsnd driver. A new helper function
`rsnd_pick_endpoint_node_for_ports()` is introduced to handle the
selection of the endpoint node by checking whether the port is named
'port' or 'ports'.

This change simplifies the logic in both `rsnd_dai_of_node()` and
`rsnd_dai_probe()` functions by replacing repetitive condition checks
with the new helper.

Suggested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
Note, this patch applies on top of [0]
[0] https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
---
 sound/soc/sh/rcar/core.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index eca5ce096e54..c32e88d6a141 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -1233,6 +1233,19 @@ int rsnd_node_count(struct rsnd_priv *priv, struct device_node *node, char *name
 	return i;
 }
 
+static struct device_node*
+	rsnd_pick_endpoint_node_for_ports(struct device_node *e_ports,
+					  struct device_node *e_port)
+{
+	if (of_node_name_eq(e_ports, "ports"))
+		return e_ports;
+
+	if (of_node_name_eq(e_ports, "port"))
+		return e_port;
+
+	return NULL;
+}
+
 static int rsnd_dai_of_node(struct rsnd_priv *priv, int *is_graph)
 {
 	struct device *dev = rsnd_priv_to_dev(priv);
@@ -1278,12 +1291,10 @@ static int rsnd_dai_of_node(struct rsnd_priv *priv, int *is_graph)
 	 * Audio-Graph-Card
 	 */
 	for_each_child_of_node(np, ports) {
-		if (!of_node_name_eq(ports, "ports") &&
-		    !of_node_name_eq(ports, "port"))
+		node = rsnd_pick_endpoint_node_for_ports(ports, np);
+		if (!node)
 			continue;
-		priv->component_dais[i] =
-			of_graph_get_endpoint_count(of_node_name_eq(ports, "ports") ?
-						    ports : np);
+		priv->component_dais[i] = of_graph_get_endpoint_count(node);
 		nr += priv->component_dais[i];
 		i++;
 		if (i >= RSND_MAX_COMPONENT) {
@@ -1488,15 +1499,16 @@ static int rsnd_dai_probe(struct rsnd_priv *priv)
 	 */
 	dai_i = 0;
 	if (is_graph) {
+		struct device_node *dai_np_port;
 		struct device_node *ports;
 		struct device_node *dai_np;
 
 		for_each_child_of_node(np, ports) {
-			if (!of_node_name_eq(ports, "ports") &&
-			    !of_node_name_eq(ports, "port"))
+			dai_np_port = rsnd_pick_endpoint_node_for_ports(ports, np);
+			if (!dai_np_port)
 				continue;
-			for_each_endpoint_of_node(of_node_name_eq(ports, "ports") ?
-						  ports : np, dai_np) {
+
+			for_each_endpoint_of_node(dai_np_port, dai_np) {
 				__rsnd_dai_probe(priv, dai_np, dai_np, 0, dai_i);
 				if (!rsnd_is_gen1(priv) && !rsnd_is_gen2(priv)) {
 					rdai = rsnd_rdai_get(priv, dai_i);
-- 
2.43.0