ASoC: samsung: arndale: Simplify DAI link initialization

There is only one DAI link so we can drop an unnecessary loop statement.
Use card->dai_link in place of direct static arndale_rt5631_dai[] array
dereference as a prerequisite for adding support for other CODECs.
Unnecessary assignment of dai_link->codecs->name to NULL is removed.
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Link: https://lore.kernel.org/r/20191002105652.24821-1-s.nawrocki@samsung.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/samsung/arndale_rt5631.c

@@ -88,36 +88,30 @@ static void arndale_put_of_nodes(struct snd_soc_card *card)
 
 static int arndale_audio_probe(struct platform_device *pdev)
 {
-	int n, ret;
 	struct device_node *np = pdev->dev.of_node;
 	struct snd_soc_card *card = &arndale_rt5631;
+	struct snd_soc_dai_link *dai_link;
+	int ret;
 
 	card->dev = &pdev->dev;
+	dai_link = card->dai_link;
+
+	dai_link->cpus->of_node = of_parse_phandle(np, "samsung,audio-cpu", 0);
+	if (!dai_link->cpus->of_node) {
+		dev_err(&pdev->dev,
+			"Property 'samsung,audio-cpu' missing or invalid\n");
+		return -EINVAL;
+	}
 
-	for (n = 0; np && n < ARRAY_SIZE(arndale_rt5631_dai); n++) {
-		if (!arndale_rt5631_dai[n].cpus->dai_name) {
-			arndale_rt5631_dai[n].cpus->of_node = of_parse_phandle(np,
-					"samsung,audio-cpu", n);
-
-			if (!arndale_rt5631_dai[n].cpus->of_node) {
-				dev_err(&pdev->dev,
-				"Property 'samsung,audio-cpu' missing or invalid\n");
-				return -EINVAL;
-			}
-		}
-		if (!arndale_rt5631_dai[n].platforms->name)
-			arndale_rt5631_dai[n].platforms->of_node =
-					arndale_rt5631_dai[n].cpus->of_node;
-
-		arndale_rt5631_dai[n].codecs->name = NULL;
-		arndale_rt5631_dai[n].codecs->of_node = of_parse_phandle(np,
-					"samsung,audio-codec", n);
-		if (!arndale_rt5631_dai[0].codecs->of_node) {
-			dev_err(&pdev->dev,
+	if (!dai_link->platforms->name)
+		dai_link->platforms->of_node = dai_link->cpus->of_node;
+
+	dai_link->codecs->of_node = of_parse_phandle(np, "samsung,audio-codec", 0);
+	if (!dai_link->codecs->of_node) {
+		dev_err(&pdev->dev,
 			"Property 'samsung,audio-codec' missing or invalid\n");
-			ret = -EINVAL;
-			goto err_put_of_nodes;
-		}
+		ret = -EINVAL;
+		goto err_put_of_nodes;
 	}
 
 	ret = devm_snd_soc_register_card(card->dev, card);