1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/sound/dmic-codec.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Generic PDM Digital microphone (DMIC) codec
8
9 maintainers:
10 - Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
11
12 allOf:
13 - $ref: dai-common.yaml#
14
15 properties:
16 compatible:
17 const: dmic-codec
18
19 '#sound-dai-cells':
20 const: 0
21
22 dmicen-gpios:
23 description: GPIO specifier for DMIC to control start and stop
24 maxItems: 1
25
26 num-channels:
27 description: Number of microphones on this DAI
28 $ref: /schemas/types.yaml#/definitions/uint32
29 minimum: 1
30 maximum: 8
31 default: 8
32
33 modeswitch-delay-ms:
34 description: Delay (in ms) to complete DMIC mode switch
35
36 wakeup-delay-ms:
37 description: Delay (in ms) after enabling the DMIC
38
39 required:
40 - compatible
41
42 unevaluatedProperties: false
43
44 examples:
45 - |
46 #include <dt-bindings/gpio/gpio.h>
47
48 dmic {
49 compatible = "dmic-codec";
50 dmicen-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>;
51 num-channels = <1>;
52 wakeup-delay-ms = <50>;
53 modeswitch-delay-ms = <35>;
54 };
55 ...
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