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