ASoC: fsl_audmix: register card device depends on 'dais' property

[ Upstream commit 294a60e ]

In order to make the audmix device linked by audio graph card, make
'dais' property to be optional.

If 'dais' property exists, then register the imx-audmix card driver.
otherwise, it should be linked by audio graph card.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://patch.msgid.link/20250226100508.2352568-5-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

sound/soc/fsl/fsl_audmix.c

@@ -492,11 +492,17 @@ static int fsl_audmix_probe(struct platform_device *pdev)
 		goto err_disable_pm;
 	}
 
-	priv->pdev = platform_device_register_data(dev, "imx-audmix", 0, NULL, 0);
-	if (IS_ERR(priv->pdev)) {
-		ret = PTR_ERR(priv->pdev);
-		dev_err(dev, "failed to register platform: %d\n", ret);
-		goto err_disable_pm;
+	/*
+	 * If dais property exist, then register the imx-audmix card driver.
+	 * otherwise, it should be linked by audio graph card.
+	 */
+	if (of_find_property(pdev->dev.of_node, "dais", NULL)) {
+		priv->pdev = platform_device_register_data(dev, "imx-audmix", 0, NULL, 0);
+		if (IS_ERR(priv->pdev)) {
+			ret = PTR_ERR(priv->pdev);
+			dev_err(dev, "failed to register platform: %d\n", ret);
+			goto err_disable_pm;
+		}
 	}
 
 	return 0;