MLK-11479-11 ASoC: imx-wm8962: Add non-SSI cpu dai support

cherry-pick below patch from v3.14.y:
ENGR00307635-5 ASoC: imx-wm8962: Add non-SSI cpu dai support

The current imx-wm8962 machine driver is designed for SSI as CPU DAI only
while as its name we should make the driver more generic to any other CPU
DAI on i.MX serires -- ESAI, SAI for example.

So this patch makes the driver more general so as to support those non-SSI
cases.

Acked-by: Wang Shengjiu <b02247@freescale.com>
Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
(cherry picked from commit b6fca438dde1b4c0bbdee31729871d601f287dc9)

3 files changed, 22 insertions, 12 deletions

diff --git a/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt b/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt
index 5006de2b230d..06bc12d4cc76 100644
--- a/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt
+++ b/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt
@@ -6,7 +6,7 @@ Required properties:
 
   - model		: The user-visible name of this sound complex
 
-  - ssi-controller	: The phandle of the i.MX SSI controller
+  - cpu-dai		: The phandle of CPU DAI
 
   - audio-codec		: The phandle of the WM8962 audio codec
 
@@ -43,7 +43,7 @@ sound {
 	compatible = "fsl,imx6q-sabresd-wm8962",
 		     "fsl,imx-audio-wm8962";
 	model = "wm8962-audio";
-	ssi-controller = <&ssi2>;
+	cpu-dai = <&ssi2>;
 	audio-codec = <&codec>;
 		audio-routing =
 		"Headphone Jack", "HPOUTL",
diff --git a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
index 0ee9b4bf5c60..adee0496ad24 100644
--- a/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-sabresd.dtsi
@@ -113,7 +113,7 @@
 		compatible = "fsl,imx6q-sabresd-wm8962",
 			   "fsl,imx-audio-wm8962";
 		model = "wm8962-audio";
-		ssi-controller = <&ssi2>;
+		cpu-dai = <&ssi2>;
 		audio-codec = <&codec>;
 		audio-routing =
 			"Headphone Jack", "HPOUTL",
diff --git a/sound/soc/fsl/imx-wm8962.c b/sound/soc/fsl/imx-wm8962.c
index d79c41a37211..f783b891722b 100644
--- a/sound/soc/fsl/imx-wm8962.c
+++ b/sound/soc/fsl/imx-wm8962.c
@@ -500,8 +500,8 @@ static int imx_wm8962_late_probe(struct snd_soc_card *card)
 static int imx_wm8962_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct device_node *ssi_np, *codec_np;
-	struct platform_device *ssi_pdev;
+	struct device_node *cpu_np, *codec_np;
+	struct platform_device *cpu_pdev;
 	struct imx_priv *priv = &card_priv;
 	struct i2c_client *codec_dev;
 	struct imx_wm8962_data *data;
@@ -511,6 +511,16 @@ static int imx_wm8962_probe(struct platform_device *pdev)
 
 	priv->pdev = pdev;
 
+	cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
+	if (!cpu_np) {
+		dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	if (!strstr(cpu_np->name, "ssi"))
+		goto audmux_bypass;
+
 	ret = of_property_read_u32(np, "mux-int-port", &int_port);
 	if (ret) {
 		dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
@@ -547,16 +557,16 @@ static int imx_wm8962_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
+audmux_bypass:
 	codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0);
-	if (!ssi_np || !codec_np) {
+	if (!codec_np) {
 		dev_err(&pdev->dev, "phandle missing or invalid\n");
 		ret = -EINVAL;
 		goto fail;
 	}
 
-	ssi_pdev = of_find_device_by_node(ssi_np);
-	if (!ssi_pdev) {
+	cpu_pdev = of_find_device_by_node(cpu_np);
+	if (!cpu_pdev) {
 		dev_err(&pdev->dev, "failed to find SSI platform device\n");
 		ret = -EINVAL;
 		goto fail;
@@ -598,8 +608,8 @@ static int imx_wm8962_probe(struct platform_device *pdev)
 	data->dai.stream_name = "HiFi";
 	data->dai.codec_dai_name = "wm8962";
 	data->dai.codec_of_node = codec_np;
-	data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
-	data->dai.platform_of_node = ssi_np;
+	data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+	data->dai.platform_of_node = cpu_np;
 	data->dai.ops = &imx_hifi_ops;
 	data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 			    SND_SOC_DAIFMT_CBM_CFM;
@@ -661,7 +671,7 @@ fail_mic:
 	driver_remove_file(pdev->dev.driver, &driver_attr_headphone);
 fail_hp:
 fail:
-	of_node_put(ssi_np);
+	of_node_put(cpu_np);
 	of_node_put(codec_np);
 
 	return ret;