# 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 - Sameer Pujar 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 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"; }; ...