summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/hwmon/nuvoton,nct7802.yaml
blob: cd8dcd7970311b2a308b57f40e9527eecdeea23f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---

$id: http://devicetree.org/schemas/hwmon/nuvoton,nct7802.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Nuvoton NCT7802Y Hardware Monitoring IC

maintainers:
  - Guenter Roeck <linux@roeck-us.net>

description: |
  The NCT7802Y is a hardware monitor IC which supports one on-die and up to
  5 remote temperature sensors with SMBus interface.

  Datasheets:
    https://www.nuvoton.com/export/resource-files/Nuvoton_NCT7802Y_Datasheet_V12.pdf

additionalProperties: false

properties:
  compatible:
    enum:
      - nuvoton,nct7802

  reg:
    maxItems: 1

  "#address-cells":
    const: 1

  "#size-cells":
    const: 0

patternProperties:
  "^channel@[0-3]$":
    type: object

    additionalProperties: false

    properties:
      reg:
        items:
          - enum:
              - 0    # Local Temperature Sensor ("LTD")
              - 1    # Remote Temperature Sensor or Voltage Sensor 1 ("RTD1")
              - 2    # Remote Temperature Sensor or Voltage Sensor 2 ("RTD2")
              - 3    # Remote Temperature Sensor or Voltage Sensor 3 ("RTD3")

      sensor-type:
        items:
          - enum:
              - temperature
              - voltage

      temperature-mode:
        items:
          - enum:
              - thermistor
              - thermal-diode

    required:
      - reg

    allOf:
      # For channels RTD1, RTD2 and RTD3, require sensor-type to be set.
      # Otherwise (for all other channels), do not allow temperature-mode to be
      # set.
      - if:
          properties:
            reg:
              items:
                - enum:
                    - 1
                    - 2
                    - 3
        then:
          required:
            - sensor-type
        else:
          not:
            required:
              - sensor-type

      # For channels RTD1 and RTD2 and if sensor-type is "temperature", require
      # temperature-mode to be set. Otherwise (for all other channels or
      # sensor-type settings), do not allow temperature-mode to be set
      - if:
          properties:
            reg:
              items:
                - enum:
                    - 1
                    - 2
            sensor-type:
              items:
                - enum:
                    - temperature
        then:
          required:
            - temperature-mode
        else:
          not:
            required:
              - temperature-mode

required:
  - compatible
  - reg

examples:
  - |
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;

        nct7802@28 {
            compatible = "nuvoton,nct7802";
            reg = <0x28>;

            #address-cells = <1>;
            #size-cells = <0>;

            channel@0 { /* LTD */
                reg = <0>;
            };

            channel@1 { /* RTD1 */
                reg = <1>;
                sensor-type = "voltage";
            };

            channel@2 { /* RTD2 */
                reg = <2>;
                sensor-type = "temperature";
                temperature-mode = "thermal-diode";
            };

            channel@3 { /* RTD3 */
                reg = <3>;
                sensor-type = "temperature";
            };
        };
    };