xref: /linux/Documentation/devicetree/bindings/hwmon/maxim,max6639.yaml (revision d9a0788093565c300f7c8dd034dbfa6ac4da9aa6) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/hwmon/maxim,max6639.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Maxim max6639
8
9maintainers:
10  - Naresh Solanki <naresh.solanki@9elements.com>
11
12description: |
13  The MAX6639 is a 2-channel temperature monitor with dual, automatic, PWM
14  fan-speed controller.  It monitors its own temperature and one external
15  diode-connected transistor or the temperatures of two external diode-connected
16  transistors, typically available in CPUs, FPGAs, or GPUs.
17
18  Datasheets:
19    https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
20
21properties:
22  compatible:
23    enum:
24      - maxim,max6639
25
26  reg:
27    maxItems: 1
28
29  '#address-cells':
30    const: 1
31
32  '#size-cells':
33    const: 0
34
35  '#pwm-cells':
36    const: 3
37
38required:
39  - compatible
40  - reg
41
42patternProperties:
43  "^fan@[0-1]$":
44    type: object
45    description:
46      Represents the two fans and their specific configuration.
47
48    $ref: fan-common.yaml#
49
50    unevaluatedProperties: false
51
52    properties:
53      reg:
54        description:
55          The fan number.
56
57    required:
58      - reg
59
60additionalProperties: false
61
62examples:
63  - |
64    i2c {
65        #address-cells = <1>;
66        #size-cells = <0>;
67
68        fan1: fan-controller@10 {
69            compatible = "maxim,max6639";
70            reg = <0x10>;
71            #address-cells = <1>;
72            #size-cells = <0>;
73            #pwm-cells = <3>;
74
75            fan@0 {
76                reg = <0x0>;
77                pulses-per-revolution = <2>;
78                max-rpm = <4000>;
79                target-rpm = <1000>;
80                pwms = <&fan1 0 25000 0>;
81            };
82
83            fan@1 {
84                reg = <0x1>;
85                pulses-per-revolution = <2>;
86                max-rpm = <8000>;
87                pwms = <&fan1 1 25000 0>;
88            };
89        };
90    };
91...
92