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     1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/sound/nvidia,tegra210-dmic.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Tegra210 DMIC Controller Device Tree Bindings
    8 
    9 description: |
   10   The Digital MIC (DMIC) Controller is used to interface with Pulse
   11   Density Modulation (PDM) input devices. It converts PDM signals to
   12   Pulse Coded Modulation (PCM) signals. DMIC can be viewed as a PDM
   13   receiver.
   14 
   15 maintainers:
   16   - Jon Hunter <jonathanh@nvidia.com>
   17   - Sameer Pujar <spujar@nvidia.com>
   18 
   19 allOf:
   20   - $ref: name-prefix.yaml#
   21 
   22 properties:
   23   $nodename:
   24     pattern: "^dmic@[0-9a-f]*$"
   25 
   26   compatible:
   27     oneOf:
   28       - const: nvidia,tegra210-dmic
   29       - items:
   30           - enum:
   31               - nvidia,tegra234-dmic
   32               - nvidia,tegra194-dmic
   33               - nvidia,tegra186-dmic
   34           - const: nvidia,tegra210-dmic
   35 
   36   reg:
   37     maxItems: 1
   38 
   39   clocks:
   40     maxItems: 1
   41 
   42   clock-names:
   43     const: dmic
   44 
   45   assigned-clocks:
   46     maxItems: 1
   47 
   48   assigned-clock-parents:
   49     maxItems: 1
   50 
   51   assigned-clock-rates:
   52     maxItems: 1
   53 
   54   sound-name-prefix:
   55     pattern: "^DMIC[1-9]$"
   56 
   57   ports:
   58     $ref: /schemas/graph.yaml#/properties/ports
   59     properties:
   60       port@0:
   61         $ref: audio-graph-port.yaml#
   62         unevaluatedProperties: false
   63         description: |
   64           DMIC ACIF (Audio Client Interface) port connected to the
   65           corresponding AHUB (Audio Hub) ACIF port.
   66 
   67       port@1:
   68         $ref: audio-graph-port.yaml#
   69         unevaluatedProperties: false
   70         description: |
   71           DMIC DAP (Digital Audio Port) interface which can be connected
   72           to external audio codec for capture.
   73 
   74 required:
   75   - compatible
   76   - reg
   77   - clocks
   78   - clock-names
   79   - assigned-clocks
   80   - assigned-clock-parents
   81 
   82 additionalProperties: false
   83 
   84 examples:
   85   - |
   86     #include<dt-bindings/clock/tegra210-car.h>
   87 
   88     dmic@702d4000 {
   89         compatible = "nvidia,tegra210-dmic";
   90         reg = <0x702d4000 0x100>;
   91         clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
   92         clock-names = "dmic";
   93         assigned-clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
   94         assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
   95         assigned-clock-rates = <3072000>;
   96         sound-name-prefix = "DMIC1";
   97     };
   98 
   99 ...
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