ASoC: simple-card: add new simple_priv_to_card() macro

Current simple card driver is directly calling priv->snd_card
everywhere, but it makes unreadable code.
Let's use simple_priv_to_card() macro for it
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/generic/simple-card.c

@@ -40,9 +40,10 @@ struct simple_card_data {
 	struct snd_soc_dai_link *dai_link;
 };
 
-#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
-#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
+#define simple_priv_to_card(priv) (&(priv)->snd_card)
 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
+#define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
+#define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
 
 #define DAI	"sound-dai"
 #define CELL	"#sound-dai-cells"
@@ -323,6 +324,7 @@ static int asoc_simple_card_parse_aux_devs(struct device_node *node,
 {
 	struct device *dev = simple_priv_to_dev(priv);
 	struct device_node *aux_node;
+	struct snd_soc_card *card = simple_priv_to_card(priv);
 	int i, n, len;
 
 	if (!of_find_property(node, PREFIX "aux-devs", &len))
@@ -332,19 +334,19 @@ static int asoc_simple_card_parse_aux_devs(struct device_node *node,
 	if (n <= 0)
 		return -EINVAL;
 
-	priv->snd_card.aux_dev = devm_kzalloc(dev,
-			n * sizeof(*priv->snd_card.aux_dev), GFP_KERNEL);
-	if (!priv->snd_card.aux_dev)
+	card->aux_dev = devm_kzalloc(dev,
+			n * sizeof(*card->aux_dev), GFP_KERNEL);
+	if (!card->aux_dev)
 		return -ENOMEM;
 
 	for (i = 0; i < n; i++) {
 		aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
 		if (!aux_node)
 			return -EINVAL;
-		priv->snd_card.aux_dev[i].codec_of_node = aux_node;
+		card->aux_dev[i].codec_of_node = aux_node;
 	}
 
-	priv->snd_card.num_aux_devs = n;
+	card->num_aux_devs = n;
 	return 0;
 }
 
@@ -352,6 +354,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 				     struct simple_card_data *priv)
 {
 	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_card *card = simple_priv_to_card(priv);
 	struct device_node *dai_link;
 	int ret;
 
@@ -362,7 +365,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 
 	/* The off-codec widgets */
 	if (of_property_read_bool(node, PREFIX "widgets")) {
-		ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
+		ret = snd_soc_of_parse_audio_simple_widgets(card,
 					PREFIX "widgets");
 		if (ret)
 			goto card_parse_end;
@@ -370,7 +373,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 
 	/* DAPM routes */
 	if (of_property_read_bool(node, PREFIX "routing")) {
-		ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
+		ret = snd_soc_of_parse_audio_routing(card,
 					PREFIX "routing");
 		if (ret)
 			goto card_parse_end;
@@ -401,7 +404,7 @@ static int asoc_simple_card_parse_of(struct device_node *node,
 			goto card_parse_end;
 	}
 
-	ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX);
+	ret = asoc_simple_card_parse_card_name(card, PREFIX);
 	if (ret < 0)
 		goto card_parse_end;
 
@@ -420,6 +423,7 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	struct simple_dai_props *dai_props;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
+	struct snd_soc_card *card;
 	int num, ret;
 
 	/* Get the number of DAI links */
@@ -442,10 +446,11 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 	priv->dai_link			= dai_link;
 
 	/* Init snd_soc_card */
-	priv->snd_card.owner		= THIS_MODULE;
-	priv->snd_card.dev		= dev;
-	priv->snd_card.dai_link		= priv->dai_link;
-	priv->snd_card.num_links	= num;
+	card = simple_priv_to_card(priv);
+	card->owner		= THIS_MODULE;
+	card->dev		= dev;
+	card->dai_link		= priv->dai_link;
+	card->num_links		= num;
 
 	if (np && of_device_is_available(np)) {
 
@@ -474,7 +479,7 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 			return -EINVAL;
 		}
 
-		priv->snd_card.name	= (cinfo->card) ? cinfo->card : cinfo->name;
+		card->name		= (cinfo->card) ? cinfo->card : cinfo->name;
 		dai_link->name		= cinfo->name;
 		dai_link->stream_name	= cinfo->name;
 		dai_link->platform_name	= cinfo->platform;
@@ -489,13 +494,13 @@ static int asoc_simple_card_probe(struct platform_device *pdev)
 					sizeof(priv->dai_props->codec_dai));
 	}
 
-	snd_soc_card_set_drvdata(&priv->snd_card, priv);
+	snd_soc_card_set_drvdata(card, priv);
 
-	ret = devm_snd_soc_register_card(dev, &priv->snd_card);
+	ret = devm_snd_soc_register_card(dev, card);
 	if (ret >= 0)
 		return ret;
 err:
-	asoc_simple_card_clean_reference(&priv->snd_card);
+	asoc_simple_card_clean_reference(card);
 
 	return ret;
 }