1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/cdc/adi,ad7746.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor
8
9 maintainers:
10 - Michael Hennerich <michael.hennerich@analog.com>
11
12 description: |
13 AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor
14
15 Specifications about the part can be found at:
16 https://www.analog.com/media/en/technical-documentation/data-sheets/ad7291.pdf
17
18 properties:
19 compatible:
20 enum:
21 - adi,ad7745
22 - adi,ad7746
23 - adi,ad7747
24
25 reg:
26 maxItems: 1
27
28 adi,excitation-vdd-permille:
29 description: |
30 Set VDD per mille to be used as the excitation voltage.
31 $ref: /schemas/types.yaml#/definitions/uint32
32 enum: [125, 250, 375, 500]
33
34 adi,exca-output-en:
35 description: Enables the EXCA pin as the excitation output.
36 type: boolean
37
38 adi,exca-output-invert:
39 description: |
40 Inverts the excitation output in the EXCA pin.
41 Normally only one of the EXCX pins would be inverted, check the following
42 application notes for more details
43 https://www.analog.com/media/en/technical-documentation/application-notes/AN-1585.pdf
44 type: boolean
45
46 adi,excb-output-en:
47 description: Enables the EXCB pin as the excitation output.
48 type: boolean
49
50 adi,excb-output-invert:
51 description: Inverts the excitation output in the EXCB pin.
52 type: boolean
53
54 required:
55 - compatible
56 - reg
57
58 additionalProperties: false
59
60 examples:
61 - |
62 i2c {
63 #address-cells = <1>;
64 #size-cells = <0>;
65
66 ad7746: cdc@48 {
67 compatible = "adi,ad7746";
68 reg = <0x48>;
69 adi,excitation-vdd-permille = <125>;
70
71 adi,exca-output-en;
72 adi,exca-output-invert;
73 adi,excb-output-en;
74 adi,excb-output-invert;
75 };
76 };
77 ...
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