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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,tegra210-dmic.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Tegra210 DMIC Controller Device Tree Bindings
description: |
The Digital MIC (DMIC) Controller is used to interface with Pulse
Density Modulation (PDM) input devices. It converts PDM signals to
Pulse Coded Modulation (PCM) signals. DMIC can be viewed as a PDM
receiver.
maintainers:
- Jon Hunter <jonathanh@nvidia.com>
- Sameer Pujar <spujar@nvidia.com>
allOf:
- $ref: audio-graph-port.yaml#
properties:
$nodename:
pattern: "^dmic@[0-9a-f]*$"
compatible:
oneOf:
- const: nvidia,tegra210-dmic
- items:
- enum:
- nvidia,tegra194-dmic
- nvidia,tegra186-dmic
- const: nvidia,tegra210-dmic
reg:
maxItems: 1
clocks:
maxItems: 1
clock-names:
const: dmic
assigned-clocks:
maxItems: 1
assigned-clock-parents:
maxItems: 1
assigned-clock-rates:
maxItems: 1
sound-name-prefix:
pattern: "^DMIC[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 "DMIC1" or "DMIC2" ... "DMICx", where x depends
on the maximum available instances on a Tegra SoC.
ports:
type: object
properties:
port@0:
description: |
DMIC ACIF (Audio Client Interface) port connected to the
corresponding AHUB (Audio Hub) ACIF port.
port@1:
description: |
DMIC DAP (Digital Audio Port) interface which can be connected
to external audio codec for capture.
required:
- compatible
- reg
- clocks
- clock-names
- assigned-clocks
- assigned-clock-parents
unevaluatedProperties: false
examples:
- |
#include<dt-bindings/clock/tegra210-car.h>
dmic@702d4000 {
compatible = "nvidia,tegra210-dmic";
reg = <0x702d4000 0x100>;
clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
clock-names = "dmic";
assigned-clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
assigned-clock-rates = <3072000>;
sound-name-prefix = "DMIC1";
};
...
|
