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