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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-asrc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Tegra186 ASRC
description: |
Asynchronous Sample Rate Converter (ASRC) converts the sampling frequency
of the input signal from one frequency to another. It can handle over a
wide range of sample rate ratios (freq_in/freq_out) from 1:24 to 24:1.
ASRC has two modes of operation. One where ratio can be programmed in SW
and the other where it gets the information from ratio estimator module.
It supports sample rate conversions in the range of 8 to 192 kHz and
supports 6 streams upto 12 total channels. The input data size can be
16, 24 and 32 bits.
maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Mohan Kumar <mkumard@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: dai-common.yaml#
properties:
$nodename:
pattern: "^asrc@[0-9a-f]*$"
compatible:
oneOf:
- const: nvidia,tegra186-asrc
- items:
- enum:
- nvidia,tegra234-asrc
- nvidia,tegra194-asrc
- const: nvidia,tegra186-asrc
reg:
maxItems: 1
sound-name-prefix:
pattern: "^ASRC[1-9]$"
ports:
$ref: /schemas/graph.yaml#/properties/ports
description: |
ASRC has seven input ports and six output ports. Accordingly ACIF
(Audio Client Interfaces) port nodes are defined to represent the
ASRC inputs (port 0 to 6) and outputs (port 7 to 12). These are
connected to corresponding ports on AHUB (Audio Hub). Additional
input (port 6) is for receiving ratio information from estimator.
patternProperties:
'^port@[0-6]':
$ref: audio-graph-port.yaml#
unevaluatedProperties: false
description: ASRC ACIF input ports
'^port@[7-9]|1[1-2]':
$ref: audio-graph-port.yaml#
unevaluatedProperties: false
description: ASRC ACIF output ports
required:
- compatible
- reg
additionalProperties: false
examples:
- |
asrc@2910000 {
compatible = "nvidia,tegra186-asrc";
reg = <0x2910000 0x2000>;
sound-name-prefix = "ASRC1";
};
...
|
