STMicroelectronics STM32 S/PDIF receiver (SPDIFRX).
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The SPDIFRX peripheral, is designed to receive an S/PDIF flow compliant with
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IEC-60958 and IEC-61937.
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Required properties:
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- compatible: should be "st,stm32h7-spdifrx"
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- reg: cpu DAI IP base address and size
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- clocks: must contain an entry for kclk (used as S/PDIF signal reference)
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- clock-names: must contain "kclk"
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- interrupts: cpu DAI interrupt line
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- dmas: DMA specifiers for audio data DMA and iec control flow DMA
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See STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt
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- dma-names: two dmas have to be defined, "rx" and "rx-ctrl"
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Optional properties:
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- resets: Reference to a reset controller asserting the SPDIFRX
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The device node should contain one 'port' child node with one child 'endpoint'
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node, according to the bindings defined in Documentation/devicetree/bindings/
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graph.txt.
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Example:
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spdifrx: spdifrx@40004000 {
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compatible = "st,stm32h7-spdifrx";
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reg = <0x40004000 0x400>;
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clocks = <&rcc SPDIFRX_CK>;
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clock-names = "kclk";
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interrupts = <97>;
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dmas = <&dmamux1 2 93 0x400 0x0>,
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<&dmamux1 3 94 0x400 0x0>;
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dma-names = "rx", "rx-ctrl";
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pinctrl-0 = <&spdifrx_pins>;
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pinctrl-names = "default";
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spdifrx_port: port {
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cpu_endpoint: endpoint {
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remote-endpoint = <&codec_endpoint>;
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};
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};
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};
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spdif_in: spdif-in {
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compatible = "linux,spdif-dir";
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codec_port: port {
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codec_endpoint: endpoint {
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remote-endpoint = <&cpu_endpoint>;
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};
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};
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};
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soundcard {
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compatible = "audio-graph-card";
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dais = <&spdifrx_port>;
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};
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