Kernel-4.18.0-80.el8_st,stm32-spdifrx

STMicroelectronics STM32 S/PDIF receiver (SPDIFRX).

The SPDIFRX peripheral, is designed to receive an S/PDIF flow compliant with
IEC-60958 and IEC-61937.

Required properties:

• compatible: should be “st,stm32h7-spdifrx”
• reg: cpu DAI IP base address and size
• clocks: must contain an entry for kclk (used as S/PDIF signal reference)
• clock-names: must contain “kclk”
• interrupts: cpu DAI interrupt line
• dmas: DMA specifiers for audio data DMA and iec control flow DMA
  See STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt
• dma-names: two dmas have to be defined, “rx” and “rx-ctrl”

Optional properties:

• resets: Reference to a reset controller asserting the SPDIFRX

The device node should contain one ‘port’ child node with one child ‘endpoint’
node, according to the bindings defined in Documentation/devicetree/bindings/
graph.txt.

Example:
spdifrx: spdifrx@40004000 {
compatible = “st,stm32h7-spdifrx”;
reg = <0x40004000 0x400>;
clocks = <&rcc SPDIFRX_CK>;
clock-names = “kclk”;
interrupts = <97>;
dmas = <&dmamux1 2 93 0x400 0x0>,
<&dmamux1 3 94 0x400 0x0>;
dma-names = “rx”, “rx-ctrl”;
pinctrl-0 = <&spdifrx_pins>;
pinctrl-names = “default”;

spdifrx_port: port {
    cpu_endpoint: endpoint {
        remote-endpoint = <&codec_endpoint>;
    };
};

};

spdif_in: spdif-in {
compatible = “linux,spdif-dir”;

codec_port: port {
    codec_endpoint: endpoint {
        remote-endpoint = <&cpu_endpoint>;
    };
};

};

soundcard {
compatible = “audio-graph-card”;
dais = <&spdifrx_port>;
};