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
19properties:
20  $nodename:
21    pattern: "^dmic@[0-9a-f]*$"
22
23  compatible:
24    oneOf:
25      - const: nvidia,tegra210-dmic
26      - items:
27          - enum:
28              - nvidia,tegra194-dmic
29              - nvidia,tegra186-dmic
30          - const: nvidia,tegra210-dmic
31
32  reg:
33    maxItems: 1
34
35  clocks:
36    maxItems: 1
37
38  clock-names:
39    const: dmic
40
41  assigned-clocks:
42    maxItems: 1
43
44  assigned-clock-parents:
45    maxItems: 1
46
47  assigned-clock-rates:
48    maxItems: 1
49
50  sound-name-prefix:
51    pattern: "^DMIC[1-9]$"
52    allOf:
53      - $ref: /schemas/types.yaml#/definitions/string
54    description:
55      used as prefix for sink/source names of the component. Must be a
56      unique string among multiple instances of the same component.
57      The name can be "DMIC1" or "DMIC2" ... "DMICx", where x depends
58      on the maximum available instances on a Tegra SoC.
59
60required:
61  - compatible
62  - reg
63  - clocks
64  - clock-names
65  - assigned-clocks
66  - assigned-clock-parents
67
68examples:
69  - |
70    #include<dt-bindings/clock/tegra210-car.h>
71
72    dmic@702d4000 {
73        compatible = "nvidia,tegra210-dmic";
74        reg = <0x702d4000 0x100>;
75        clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
76        clock-names = "dmic";
77        assigned-clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
78        assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
79        assigned-clock-rates = <3072000>;
80        sound-name-prefix = "DMIC1";
81    };
82
83...
84