Add spdif sound card support, configure the pinmux.

This sound card supports only playback sound
through HDMI interface.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
index 7d6d332fa779..290a49bea2f7 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
@@ -107,6 +107,18 @@ simple-audio-card,codec {
 			sound-dai = <&bt_sco_codec 1>;
 		};
 	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif";
+		model = "imx-spdif";
+		audio-cpu = <&spdif>;
+		audio-codec = <&spdif_out>;
+	};
+
+	spdif_out: spdif-out {
+		compatible = "linux,spdif-dit";
+		#sound-dai-cells = <0>;
+	};
 };
 
 &cm33 {
@@ -187,6 +199,15 @@ &sai5 {
 	status = "okay";
 };
 
+&spdif {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&pinctrl_spdif>;
+	pinctrl-1 = <&pinctrl_spdif>;
+	assigned-clocks = <&cgc2 IMX8ULP_CLK_SPDIF_SEL>;
+	assigned-clock-parents = <&cgc1 IMX8ULP_CLK_SPLL3_PFD1_DIV1>;
+	status = "okay";
+};
+
 &usbotg1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_usb1>;
@@ -325,6 +346,12 @@ MX8ULP_PAD_PTF24__I2S5_RXD3	0x43
 		>;
 	};
 
+	pinctrl_spdif: spdifgrp {
+		fsl,pins = <
+			MX8ULP_PAD_PTF25__SPDIF_OUT1    0x43
+		>;
+	};
+
 	pinctrl_typec1: typec1grp {
 		fsl,pins = <
 			MX8ULP_PAD_PTF3__PTF3           0x3
-- 
2.34.1