1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/adi,ad7949.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Analog Devices AD7949/AD7682/AD7689 analog to digital converters
8
9 maintainers:
10 - Charles-Antoine Couret <charles-antoine.couret@essensium.com>
11
12 description: |
13 Specifications on the converters can be found at:
14 AD7949:
15 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7949.pdf
16 AD7682/AD7698:
17 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7682_7689.pdf
18
19 properties:
20 compatible:
21 enum:
22 - adi,ad7682
23 - adi,ad7689
24 - adi,ad7949
25
26 reg:
27 maxItems: 1
28
29 vrefin-supply:
30 description:
31 Buffered ADC reference voltage supply.
32
33 vref-supply:
34 description:
35 Unbuffered ADC reference voltage supply.
36
37 adi,internal-ref-microvolt:
38 description: |
39 Internal reference voltage selection in microvolts.
40
41 If no internal reference is specified, the channel will default to the
42 external reference defined by vrefin-supply (or vref-supply).
43 vrefin-supply will take precedence over vref-supply if both are defined.
44
45 If no supplies are defined, the reference selection will default to
46 4096mV internal reference.
47
48 enum: [2500000, 4096000]
49 default: 4096000
50
51
52 '#io-channel-cells':
53 const: 1
54
55 '#address-cells':
56 const: 1
57
58 '#size-cells':
59 const: 0
60
61 required:
62 - compatible
63 - reg
64
65 allOf:
66 - $ref: /schemas/spi/spi-peripheral-props.yaml#
67
68 unevaluatedProperties: false
69
70 examples:
71 - |
72 spi {
73 #address-cells = <1>;
74 #size-cells = <0>;
75
76 adc@0 {
77 #address-cells = <1>;
78 #size-cells = <0>;
79
80 compatible = "adi,ad7949";
81 reg = <0>;
82 vref-supply = <&vdd_supply>;
83 };
84
85 adc@1 {
86 #address-cells = <1>;
87 #size-cells = <0>;
88
89 compatible = "adi,ad7949";
90 reg = <1>;
91 vrefin-supply = <&vdd_supply>;
92 };
93
94 adc@2 {
95 #address-cells = <1>;
96 #size-cells = <0>;
97
98 compatible = "adi,ad7949";
99 reg = <2>;
100 adi,internal-ref-microvolt = <4096000>;
101 };
102 };
103 ...
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