ASoC: ti: j721e-evm: Convert the audio domain IDs to enum

Convert the J721E_AUDIO_DOMAIN_* from defines to enum to make it possible
to extend the number of domains in the future.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20210717122820.1467-4-peter.ujfalusi@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/j721e-evm.c

@@ -23,8 +23,11 @@
  */
 #define J721E_CODEC_CONF_COUNT	5
 
-#define J721E_AUDIO_DOMAIN_CPB	0
-#define J721E_AUDIO_DOMAIN_IVI	1
+enum j721e_audio_domain_id {
+	J721E_AUDIO_DOMAIN_CPB = 0,
+	J721E_AUDIO_DOMAIN_IVI,
+	J721E_AUDIO_DOMAIN_LAST,
+};
 
 #define J721E_CLK_PARENT_48000	0
 #define J721E_CLK_PARENT_44100	1
@@ -78,7 +81,7 @@ struct j721e_priv {
 	u32 pll_rates[2];
 	unsigned int hsdiv_rates[2];
 
-	struct j721e_audio_domain audio_domains[2];
+	struct j721e_audio_domain audio_domains[J721E_AUDIO_DOMAIN_LAST];
 
 	struct mutex mutex;
 };
@@ -199,9 +202,8 @@ static int j721e_configure_refclk(struct j721e_priv *priv,
 
 	if (priv->hsdiv_rates[domain->parent_clk_id] != scki) {
 		dev_dbg(priv->dev,
-			"%s configuration for %u Hz: %s, %dxFS (SCKI: %u Hz)\n",
-			audio_domain == J721E_AUDIO_DOMAIN_CPB ? "CPB" : "IVI",
-			rate,
+			"domain%u configuration for %u Hz: %s, %dxFS (SCKI: %u Hz)\n",
+			audio_domain, rate,
 			clk_id == J721E_CLK_PARENT_48000 ? "PLL4" : "PLL15",
 			ratios_for_pcm3168a[i], scki);
 
@@ -263,10 +265,11 @@ static int j721e_audio_startup(struct snd_pcm_substream *substream)
 
 	domain->active++;
 
-	if (priv->audio_domains[J721E_AUDIO_DOMAIN_CPB].rate)
-		active_rate = priv->audio_domains[J721E_AUDIO_DOMAIN_CPB].rate;
-	else
-		active_rate = priv->audio_domains[J721E_AUDIO_DOMAIN_IVI].rate;
+	for (i = 0; i < J721E_AUDIO_DOMAIN_LAST; i++) {
+		active_rate = priv->audio_domains[i].rate;
+		if (active_rate)
+			break;
+	}
 
 	if (active_rate)
 		ret = snd_pcm_hw_constraint_single(substream->runtime,
@@ -819,7 +822,7 @@ static int j721e_soc_probe(struct platform_device *pdev)
 	struct snd_soc_card *card;
 	const struct of_device_id *match;
 	struct j721e_priv *priv;
-	int link_cnt, conf_cnt, ret;
+	int link_cnt, conf_cnt, ret, i;
 
 	if (!node) {
 		dev_err(&pdev->dev, "of node is missing.\n");
@@ -843,8 +846,9 @@ static int j721e_soc_probe(struct platform_device *pdev)
 	if (!priv->dai_links)
 		return -ENOMEM;
 
-	priv->audio_domains[J721E_AUDIO_DOMAIN_CPB].parent_clk_id = -1;
-	priv->audio_domains[J721E_AUDIO_DOMAIN_IVI].parent_clk_id = -1;
+	for (i = 0; i < J721E_AUDIO_DOMAIN_LAST; i++)
+		priv->audio_domains[i].parent_clk_id = -1;
+
 	priv->dev = &pdev->dev;
 	card = &priv->card;
 	card->dev = &pdev->dev;