xref: /linux/Documentation/devicetree/bindings/sound/nvidia,tegra210-dmic.yaml (revision dec1c62e91ba268ab2a6e339d4d7a59287d5eba1) 
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
7title: Tegra210 DMIC Controller Device Tree Bindings
8
9description: |
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
15maintainers:
16  - Jon Hunter <jonathanh@nvidia.com>
17  - Sameer Pujar <spujar@nvidia.com>
18
19allOf:
20  - $ref: name-prefix.yaml#
21
22properties:
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
74required:
75  - compatible
76  - reg
77  - clocks
78  - clock-names
79  - assigned-clocks
80  - assigned-clock-parents
81
82additionalProperties: false
83
84examples:
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...
100