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