1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/hwmon/maxim,max31790.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: The Maxim MAX31790 Fan Controller
8
9 maintainers:
10 - Guenter Roeck <linux@roeck-us.net>
11 - Chanh Nguyen <chanh@os.amperecomputing.com>
12
13 description: >
14 The MAX31790 controls the speeds of up to six fans using six
15 independent PWM outputs. The desired fan speeds (or PWM duty cycles)
16 are written through the I2C interface.
17
18 Datasheets:
19 https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf
20
21 properties:
22 compatible:
23 const: maxim,max31790
24
25 reg:
26 maxItems: 1
27
28 clocks:
29 maxItems: 1
30
31 resets:
32 maxItems: 1
33
34 "#pwm-cells":
35 const: 1
36
37 patternProperties:
38 "^fan-[0-9]+$":
39 $ref: fan-common.yaml#
40 unevaluatedProperties: false
41
42 required:
43 - compatible
44 - reg
45
46 additionalProperties: false
47
48 examples:
49 - |
50 i2c {
51 #address-cells = <1>;
52 #size-cells = <0>;
53
54 pwm_provider: fan-controller@20 {
55 compatible = "maxim,max31790";
56 reg = <0x20>;
57 clocks = <&sys_clk>;
58 resets = <&reset 0>;
59 #pwm-cells = <1>;
60
61 fan-0 {
62 pwms = <&pwm_provider 1>;
63 };
64
65 fan-1 {
66 pwms = <&pwm_provider 2>;
67 };
68 };
69 };
70
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