1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/sigma-delta-modulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Sigma delta modulator
8
9 maintainers:
10 - Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
11
12 properties:
13 compatible:
14 description: |
15 "sd-modulator" can be used as a generic SD modulator,
16 if the modulator is not specified in the compatible list.
17 enum:
18 - sd-modulator
19 - ads1201
20
21 '#io-backend-cells':
22 const: 0
23
24 '#io-channel-cells':
25 const: 0
26
27 vref-supply:
28 description: Phandle to the vref input analog reference voltage.
29
30 dependencies:
31 vref-supply: [ '#io-backend-cells' ]
32
33 required:
34 - compatible
35
36 anyOf:
37 - required: ['#io-backend-cells']
38 - required: ['#io-channel-cells']
39
40 additionalProperties: false
41
42 examples:
43 - |
44 // Backend binding example. SD modulator configured as an IIO backend device
45 ads1201_0: adc {
46 compatible = "sd-modulator";
47 vref-supply = <&vdd_adc>;
48 #io-backend-cells = <0>;
49 };
50
51 - |
52 // Legacy binding example. SD modulator configured as an IIO channel provider
53 ads1201_1: adc {
54 compatible = "sd-modulator";
55 #io-channel-cells = <0>;
56 };
57
58 ...
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