1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4
5 $id: http://devicetree.org/schemas/hwmon/nuvoton,nct7802.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Nuvoton NCT7802Y Hardware Monitoring IC
9
10 maintainers:
11 - Guenter Roeck <linux@roeck-us.net>
12
13 description: |
14 The NCT7802Y is a hardware monitor IC which supports one on-die and up to
15 5 remote temperature sensors with SMBus interface.
16
17 Datasheets:
18 https://www.nuvoton.com/export/resource-files/Nuvoton_NCT7802Y_Datasheet_V12.pdf
19
20 additionalProperties: false
21
22 properties:
23 compatible:
24 enum:
25 - nuvoton,nct7802
26
27 reg:
28 maxItems: 1
29
30 "#address-cells":
31 const: 1
32
33 "#size-cells":
34 const: 0
35
36 patternProperties:
37 "^channel@[0-3]$":
38 type: object
39
40 additionalProperties: false
41
42 properties:
43 reg:
44 items:
45 - enum:
46 - 0 # Local Temperature Sensor ("LTD")
47 - 1 # Remote Temperature Sensor or Voltage Sensor 1 ("RTD1")
48 - 2 # Remote Temperature Sensor or Voltage Sensor 2 ("RTD2")
49 - 3 # Remote Temperature Sensor or Voltage Sensor 3 ("RTD3")
50
51 sensor-type:
52 items:
53 - enum:
54 - temperature
55 - voltage
56
57 temperature-mode:
58 items:
59 - enum:
60 - thermistor
61 - thermal-diode
62
63 required:
64 - reg
65
66 allOf:
67 # For channels RTD1, RTD2 and RTD3, require sensor-type to be set.
68 # Otherwise (for all other channels), do not allow temperature-mode to be
69 # set.
70 - if:
71 properties:
72 reg:
73 items:
74 - enum:
75 - 1
76 - 2
77 - 3
78 then:
79 required:
80 - sensor-type
81 else:
82 not:
83 required:
84 - sensor-type
85
86 # For channels RTD1 and RTD2 and if sensor-type is "temperature", require
87 # temperature-mode to be set. Otherwise (for all other channels or
88 # sensor-type settings), do not allow temperature-mode to be set
89 - if:
90 properties:
91 reg:
92 items:
93 - enum:
94 - 1
95 - 2
96 sensor-type:
97 items:
98 - enum:
99 - temperature
100 then:
101 required:
102 - temperature-mode
103 else:
104 not:
105 required:
106 - temperature-mode
107
108 required:
109 - compatible
110 - reg
111
112 examples:
113 - |
114 i2c {
115 #address-cells = <1>;
116 #size-cells = <0>;
117
118 nct7802@28 {
119 compatible = "nuvoton,nct7802";
120 reg = <0x28>;
121
122 #address-cells = <1>;
123 #size-cells = <0>;
124
125 channel@0 { /* LTD */
126 reg = <0>;
127 };
128
129 channel@1 { /* RTD1 */
130 reg = <1>;
131 sensor-type = "voltage";
132 };
133
134 channel@2 { /* RTD2 */
135 reg = <2>;
136 sensor-type = "temperature";
137 temperature-mode = "thermal-diode";
138 };
139
140 channel@3 { /* RTD3 */
141 reg = <3>;
142 sensor-type = "temperature";
143 };
144 };
145 };
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