1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/dac/microchip,mcp4725.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Microchip mcp4725 and mcp4726 DAC
8
9 maintainers:
10 - Tomas Novotny <tomas@novotny.cz>
11
12 properties:
13 compatible:
14 enum:
15 - microchip,mcp4725
16 - microchip,mcp4726
17
18 reg:
19 maxItems: 1
20
21 vdd-supply:
22 description: |
23 Provides both power and acts as the reference supply on the mcp4725.
24 For the mcp4726 it will be used as the reference voltage if vref-supply
25 is not provided.
26
27 vref-supply:
28 description:
29 Vref pin is used as a voltage reference when this supply is specified.
30
31 microchip,vref-buffered:
32 type: boolean
33 description: |
34 Enable buffering of the external Vref pin. This boolean is not valid
35 without the vref-supply. Quoting the datasheet: This is offered in
36 cases where the reference voltage does not have the current
37 capability not to drop its voltage when connected to the internal
38 resistor ladder circuit.
39
40 allOf:
41 - if:
42 properties:
43 compatible:
44 contains:
45 const: microchip,mcp4725
46 then:
47 properties:
48 vref-supply: false
49 required:
50 - vdd-supply
51
52 - if:
53 properties:
54 compatible:
55 contains:
56 const: microchip,mcp4726
57 then:
58 anyOf:
59 - required:
60 - vdd-supply
61 - required:
62 - vref-supply
63
64 - if:
65 not:
66 required:
67 - vref-supply
68 then:
69 properties:
70 microchip,vref-buffered: false
71
72 required:
73 - compatible
74 - reg
75
76 additionalProperties: false
77
78 examples:
79 - |
80 i2c {
81 #address-cells = <1>;
82 #size-cells = <0>;
83
84 mcp4725@60 {
85 compatible = "microchip,mcp4725";
86 reg = <0x60>;
87 vdd-supply = <&vdac_vdd>;
88 };
89 };
90 ...
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