# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/sound/nvidia,tegra186-dspk.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Tegra186 DSPK Controller Device Tree Bindings description: | The Digital Speaker Controller (DSPK) can be viewed as a Pulse Density Modulation (PDM) transmitter that up-samples the input to the desired sampling rate by interpolation and then converts the over sampled Pulse Code Modulation (PCM) input to the desired 1-bit output via Delta Sigma Modulation (DSM). maintainers: - Jon Hunter - Sameer Pujar properties: $nodename: pattern: "^dspk@[0-9a-f]*$" compatible: oneOf: - const: nvidia,tegra186-dspk - items: - const: nvidia,tegra194-dspk - const: nvidia,tegra186-dspk reg: maxItems: 1 clocks: maxItems: 1 clock-names: const: dspk assigned-clocks: maxItems: 1 assigned-clock-parents: maxItems: 1 assigned-clock-rates: maxItems: 1 sound-name-prefix: pattern: "^DSPK[1-9]$" $ref: /schemas/types.yaml#/definitions/string description: Used as prefix for sink/source names of the component. Must be a unique string among multiple instances of the same component. The name can be "DSPK1" or "DSPKx", where x depends on the maximum available instances on a Tegra SoC. ports: $ref: /schemas/graph.yaml#/properties/ports properties: port@0: $ref: audio-graph-port.yaml# unevaluatedProperties: false description: | DSPK ACIF (Audio Client Interface) port connected to the corresponding AHUB (Audio Hub) ACIF port. port@1: $ref: audio-graph-port.yaml# unevaluatedProperties: false description: | DSPK DAP (Digital Audio Port) interface which can be connected to external audio codec for playback. required: - compatible - reg - clocks - clock-names - assigned-clocks - assigned-clock-parents - sound-name-prefix additionalProperties: false examples: - | #include dspk@2905000 { compatible = "nvidia,tegra186-dspk"; reg = <0x2905000 0x100>; clocks = <&bpmp TEGRA186_CLK_DSPK1>; clock-names = "dspk"; assigned-clocks = <&bpmp TEGRA186_CLK_DSPK1>; assigned-clock-parents = <&bpmp TEGRA186_CLK_PLL_A_OUT0>; assigned-clock-rates = <12288000>; sound-name-prefix = "DSPK1"; }; ...