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# 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
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 <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: dai-common.yaml#
properties:
$nodename:
pattern: "^dspk@[0-9a-f]*$"
compatible:
oneOf:
- const: nvidia,tegra186-dspk
- items:
- enum:
- nvidia,tegra234-dspk
- 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]$"
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<dt-bindings/clock/tegra186-clock.h>
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";
};
...
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