The i.MX8M Nano can support SPDIF which is compatible to the
IP used on the i.MX35.

Add the node.

Signed-off-by: Adam Ford <aford...@gmail.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi 
b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index 3ab9486736ca..4b32c5aa355d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -334,6 +334,30 @@ micfil: micfil@30080000 {
                                        status = "disabled";
                                };
 
+                               spdif1: spdif@30090000 {
+                                       compatible = "fsl,imx35-spdif";
+                                       reg = <0x30090000 0x10000>;
+                                       interrupts = <GIC_SPI 6 
IRQ_TYPE_LEVEL_HIGH>;
+                                       clocks = <&clk IMX8MN_CLK_AUDIO_AHB>, 
/* core */
+                                                <&clk IMX8MN_CLK_24M>, /* 
rxtx0 */
+                                                <&clk IMX8MN_CLK_SPDIF1>, /* 
rxtx1 */
+                                                <&clk IMX8MN_CLK_DUMMY>, /* 
rxtx2 */
+                                                <&clk IMX8MN_CLK_DUMMY>, /* 
rxtx3 */
+                                                <&clk IMX8MN_CLK_DUMMY>, /* 
rxtx4 */
+                                                <&clk IMX8MN_CLK_AUDIO_AHB>, 
/* rxtx5 */
+                                                <&clk IMX8MN_CLK_DUMMY>, /* 
rxtx6 */
+                                                <&clk IMX8MN_CLK_DUMMY>, /* 
rxtx7 */
+                                                <&clk IMX8MN_CLK_DUMMY>; /* 
spba */
+                                       clock-names = "core", "rxtx0",
+                                                     "rxtx1", "rxtx2",
+                                                     "rxtx3", "rxtx4",
+                                                     "rxtx5", "rxtx6",
+                                                     "rxtx7", "spba";
+                                       dmas = <&sdma2 28 18 0>, <&sdma2 29 18 
0>;
+                                       dma-names = "rx", "tx";
+                                       status = "disabled";
+                               };
+
                                sai7: sai@300b0000 {
                                        compatible = "fsl,imx8mq-sai",
                                                     "fsl,imx6sx-sai";
-- 
2.25.1

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