From c54ce1a17232215c4a518149292b41835992eee8 Mon Sep 17 00:00:00 2001 From: Sameer Pujar Date: Thu, 31 Mar 2022 19:33:27 +0530 Subject: ASoC: tegra: Add binding doc for ASRC module This patch adds YAML schema for DT bindings of Asynchronous Sample Rate Converter (ASRC) module. It will be registered as an ASoC component and can be plugged into an audio path as per need via ALSA mixer controls. The bindings are applicable on Tegra186 and later where the ASRC device is present. Signed-off-by: Sameer Pujar Link: https://lore.kernel.org/r/1648735412-32220-2-git-send-email-spujar@nvidia.com Signed-off-by: Mark Brown --- .../bindings/sound/nvidia,tegra186-asrc.yaml | 81 ++++++++++++++++++++++ .../bindings/sound/nvidia,tegra210-ahub.yaml | 4 ++ 2 files changed, 85 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml new file mode 100644 index 000000000000..520d0d063d1a --- /dev/null +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra186-asrc.yaml @@ -0,0 +1,81 @@ +# 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 Device Tree Bindings + +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 + - Mohan Kumar + - Sameer Pujar + +allOf: + - $ref: name-prefix.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"; + }; + +... diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml index 4727f1e42c53..6df6f858038c 100644 --- a/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml @@ -106,6 +106,10 @@ patternProperties: type: object $ref: nvidia,tegra210-mixer.yaml# + '^asrc@[0-9a-f]+$': + type: object + $ref: nvidia,tegra186-asrc.yaml# + required: - compatible - reg -- cgit