1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4
5 $id: http://devicetree.org/schemas/hwmon/adi,ltc2991.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Analog Devices LTC2991 Octal I2C Voltage, Current and Temperature Monitor
9
10 maintainers:
11 - Antoniu Miclaus <antoniu.miclaus@analog.com>
12
13 description: |
14 The LTC2991 is used to monitor system temperatures, voltages and currents.
15 Through the I2C serial interface, the eight monitors can individually measure
16 supply voltages and can be paired for differential measurements of current
17 sense resistors or temperature sensing transistors.
18
19 Datasheet:
20 https://www.analog.com/en/products/ltc2991.html
21
22 properties:
23 compatible:
24 const: adi,ltc2991
25
26 reg:
27 maxItems: 1
28
29 '#address-cells':
30 const: 1
31
32 '#size-cells':
33 const: 0
34
35 vcc-supply: true
36
37 patternProperties:
38 "^channel@[0-3]$":
39 type: object
40 description:
41 Represents the differential/temperature channels.
42
43 properties:
44 reg:
45 description:
46 The channel number. LTC2991 can monitor 4 currents/temperatures.
47 items:
48 minimum: 0
49 maximum: 3
50
51 shunt-resistor-micro-ohms:
52 description:
53 The value of curent sense resistor in micro ohms. Pin configuration is
54 set for differential input pair.
55
56 adi,temperature-enable:
57 description:
58 Enables temperature readings. Pin configuration is set for remote
59 diode temperature measurement.
60 type: boolean
61
62 required:
63 - reg
64
65 allOf:
66 - if:
67 required:
68 - shunt-resistor-micro-ohms
69 then:
70 properties:
71 adi,temperature-enable: false
72
73 additionalProperties: false
74
75 required:
76 - compatible
77 - reg
78 - vcc-supply
79
80 additionalProperties: false
81
82 examples:
83 - |
84 i2c {
85 #address-cells = <1>;
86 #size-cells = <0>;
87
88 hwmon@48 {
89 compatible = "adi,ltc2991";
90 reg = <0x48>;
91 vcc-supply = <&vcc>;
92 };
93 };
94 - |
95 i2c {
96 #address-cells = <1>;
97 #size-cells = <0>;
98
99 hwmon@48 {
100 #address-cells = <1>;
101 #size-cells = <0>;
102
103 compatible = "adi,ltc2991";
104 reg = <0x48>;
105 vcc-supply = <&vcc>;
106
107 channel@0 {
108 reg = <0x0>;
109 shunt-resistor-micro-ohms = <100000>;
110 };
111
112 channel@1 {
113 reg = <0x1>;
114 shunt-resistor-micro-ohms = <100000>;
115 };
116
117 channel@2 {
118 reg = <0x2>;
119 adi,temperature-enable;
120 };
121
122 channel@3 {
123 reg = <0x3>;
124 adi,temperature-enable;
125 };
126 };
127 };
128 ...
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