ASoC: Kona: Make addition of aux codec as optional

Check for aux codec count and avoid aux codec registration
if the count is zero.

Change-Id: I540dcc8f14f138b8bd673d88ab7e033779a90843
Signed-off-by: Sudheer Papothi <[email protected]>

asoc/kona.c

@@ -7168,6 +7168,7 @@ static int msm_init_aux_dev(struct platform_device *pdev,
 	struct device_node *aux_codec_of_node;
 	u32 wsa_max_devs;
 	u32 wsa_dev_cnt;
+	u32 codec_max_aux_devs = 0;
 	u32 codec_aux_dev_cnt = 0;
 	int i;
 	struct msm_wsa881x_dev_info *wsa881x_dev_info;
@@ -7283,6 +7284,24 @@ static int msm_init_aux_dev(struct platform_device *pdev,
 		__func__, found);
 
 codec_aux_dev:
+	/* Get maximum aux codec device count for this platform */
+	ret = of_property_read_u32(pdev->dev.of_node,
+				   "qcom,codec-max-aux-devs",
+				   &codec_max_aux_devs);
+	if (ret) {
+		dev_err(&pdev->dev,
+			 "%s: codec-max-aux-devs property missing in DT %s, ret = %d\n",
+			 __func__, pdev->dev.of_node->full_name, ret);
+		codec_max_aux_devs = 0;
+		goto aux_dev_register;
+	}
+	if (codec_max_aux_devs == 0) {
+		dev_dbg(&pdev->dev,
+			 "%s: Max aux codec devices is 0 for this target?\n",
+			 __func__);
+		goto aux_dev_register;
+	}
+
 	/* Get count of aux codec device phandles for this platform */
 	codec_aux_dev_cnt = of_count_phandle_with_args(
 				pdev->dev.of_node,
@@ -7299,6 +7318,19 @@ codec_aux_dev:
 		goto err;
 	}
 
+	/*
+	 * Expect total phandles count to be NOT less than maximum possible
+	 * AUX device count. However, if it is less, then assign same value to
+	 * max count as well.
+	 */
+	if (codec_aux_dev_cnt < codec_max_aux_devs) {
+		dev_dbg(&pdev->dev,
+			"%s: codec_max_aux_devs = %d cannot exceed codec_aux_dev_cnt = %d\n",
+			__func__, codec_max_aux_devs,
+			codec_aux_dev_cnt);
+		codec_max_aux_devs = codec_aux_dev_cnt;
+	}
+
 	/*
 	 * Alloc mem to store phandle and index info of aux codec
 	 * if already registered with ALSA core
@@ -7347,6 +7379,7 @@ codec_aux_dev:
 		"%s: found %d AUX codecs registered with ALSA core\n",
 		__func__, codecs_found);
 
+aux_dev_register:
 	card->num_aux_devs = wsa_max_devs + codec_aux_dev_cnt;
 	card->num_configs = wsa_max_devs + codec_aux_dev_cnt;