ARM: dts: imx6q-cm-fx6: enable S/PDIF support

Enable the S/PDIF transceiver present on the cm-fx6 module.
Signed-off-by: Christopher Spinrath <christopher.spinrath@rwth-aachen.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6q-cm-fx6.dts

@@ -89,6 +89,14 @@ reg_usb_otg_vbus: usb_otg_vbus {
 		gpio = <&gpio3 22 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif";
+		model = "imx-spdif";
+		spdif-controller = <&spdif>;
+		spdif-out;
+		spdif-in;
+	};
 };
 
 &cpu0 {
@@ -222,6 +230,13 @@ MX6QDL_PAD_EIM_CS1__GPIO2_IO24	0x1b0b1
 		>;
 	};
 
+	pinctrl_spdif: spdifgrp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_16__SPDIF_IN  0x1b0b0
+			MX6QDL_PAD_GPIO_19__SPDIF_OUT 0x1b0b0
+		>;
+	};
+
 	pinctrl_uart4: uart4grp {
 		fsl,pins = <
 			MX6QDL_PAD_KEY_COL0__UART4_TX_DATA	0x1b0b1
@@ -259,6 +274,12 @@ &snvs_poweroff {
 	status = "okay";
 };
 
+&spdif {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spdif>;
+	status = "okay";
+};
+
 &uart4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart4>;