Add binding documentation for the audio serial port interface (I2S) on Marvell MMP SoCs. Signed-off-by: Lubomir Rintel <lkundrak@xxxxx> --- .../bindings/sound/marvell,mmp-sspa.yaml | 122 ++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/marvell,mmp-sspa.yaml diff --git a/Documentation/devicetree/bindings/sound/marvell,mmp-sspa.yaml b/Documentation/devicetree/bindings/sound/marvell,mmp-sspa.yaml new file mode 100644 index 000000000000..6d20a24a2ae9 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/marvell,mmp-sspa.yaml @@ -0,0 +1,122 @@ +# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/marvell,mmp-sspa.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Marvel SSPA Digital Audio Interface Bindings + +maintainers: + - Lubomir Rintel <lkundrak@xxxxx> + +properties: + $nodename: + pattern: "^audio-controller(@.*)?$" + + compatible: + const: marvell,mmp-sspa + + reg: + items: + - description: RX block + - description: TX block + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Clock for the Audio block + - description: I2S bit clock + + clock-names: + items: + - const: audio + - const: bitclk + + power-domains: + maxItems: 1 + + '#sound-dai-cells': + const: 0 + + dmas: + items: + - description: TX DMA Channel + - description: RX DMA Channel + + dma-names: + items: + - const: tx + - const: rx + + port: + type: object + + properties: + endpoint: + type: object + + properties: + remote-endpoint: true + + frame-master: + type: boolean + description: SoC generates the frame clock + + bitclock-master: + type: boolean + description: SoC generates the bit clock + + dai-format: + $ref: /schemas/types.yaml#/definitions/string + description: The digital audio format + const: i2s + + required: + - remote-endpoint + + required: + - endpoint + + additionalProperties: false + +required: + - "#sound-dai-cells" + - compatible + - reg + - interrupts + - clocks + - clock-names + - dmas + - dma-names + - port + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/marvell,mmp2.h> + + audio-controller@d42a0c00 { + compatible = "marvell,mmp-sspa"; + reg = <0xd42a0c00 0x30>, + <0xd42a0c80 0x30>; + interrupts = <2>; + clock-names = "audio", "bitclk"; + clocks = <&soc_clocks 127>, + <&audio_clk 1>; + #sound-dai-cells = <0>; + dmas = <&adma0 0>, <&adma0 1>; + dma-names = "tx", "rx"; + port { + endpoint { + remote-endpoint = <&rt5631_0>; + frame-master; + bitclock-master; + dai-format = "i2s"; + }; + }; + }; + +... -- 2.26.2
