[PATCH v2] arm64: dts: rockchip: add spdif sound node for rock64

[Katsuhiro Suzuki]

This patch adds sound card node for rock64. Currently we can support
S/PDIF only. It seems the lack of codec driver of rk3328 to enable
analog audio out.

Signed-off-by: Katsuhiro Suzuki <katsuh...@katsuster.net>
---
 .../arm64/boot/dts/rockchip/rk3328-rock64.dts | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts 
b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
index 5852061e497b..9ee4f57557f3 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
@@ -62,6 +62,23 @@
                regulator-min-microvolt = <5000000>;
                regulator-max-microvolt = <5000000>;
        };
+
+       sound {
+               compatible = "audio-graph-card";
+               label = "rockchip,rk3328";
+               dais = <&spdif_p0>;
+       };
+
+       spdif-dit {
+               compatible = "linux,spdif-dit";
+               #sound-dai-cells = <0>;
+
+               port {
+                       dit_p0_0: endpoint {
+                               remote-endpoint = <&spdif_p0_0>;
+                       };
+               };
+       };
 };
 
 &cpu0 {
@@ -261,6 +278,18 @@
        status = "okay";
 };
 
+&spdif {
+       pinctrl-0 = <&spdifm0_tx>;
+       status = "okay";
+       #sound-dai-cells = <0>;
+
+       spdif_p0: port {
+               spdif_p0_0: endpoint {
+                       remote-endpoint = <&dit_p0_0>;
+               };
+       };
+};
+
 &tsadc {
        rockchip,hw-tshut-mode = <0>;
        rockchip,hw-tshut-polarity = <0>;
-- 
2.18.0