1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/sound/audio-iio-aux.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Audio IIO auxiliary
8
9 maintainers:
10 - Herve Codina <herve.codina@bootlin.com>
11
12 description:
13 Auxiliary device based on Industrial I/O device channels
14
15 allOf:
16 - $ref: dai-common.yaml#
17
18 properties:
19 compatible:
20 const: audio-iio-aux
21
22 io-channels:
23 description:
24 Industrial I/O device channels used
25
26 io-channel-names:
27 description:
28 Industrial I/O channel names related to io-channels.
29 These names are used to provides sound controls, widgets and routes names.
30
31 snd-control-invert-range:
32 $ref: /schemas/types.yaml#/definitions/uint32-array
33 description: |
34 A list of 0/1 flags defining whether or not the related channel is
35 inverted
36 items:
37 enum: [0, 1]
38 default: 0
39 description: |
40 Invert the sound control value compared to the IIO channel raw value.
41 - 1: The related sound control value is inverted meaning that the
42 minimum sound control value correspond to the maximum IIO channel
43 raw value and the maximum sound control value correspond to the
44 minimum IIO channel raw value.
45 - 0: The related sound control value is not inverted meaning that the
46 minimum (resp maximum) sound control value correspond to the
47 minimum (resp maximum) IIO channel raw value.
48
49 required:
50 - compatible
51 - io-channels
52 - io-channel-names
53
54 unevaluatedProperties: false
55
56 examples:
57 - |
58 iio-aux {
59 compatible = "audio-iio-aux";
60 io-channels = <&iio 0>, <&iio 1>, <&iio 2>, <&iio 3>;
61 io-channel-names = "CH0", "CH1", "CH2", "CH3";
62 /* Invert CH1 and CH2 */
63 snd-control-invert-range = <0 1 1 0>;
64 };
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