xref: /linux/Documentation/devicetree/bindings/pwm/argon40,fan-hat.yaml (revision f38b7512903a50eaeb300e9c8d9448187dd3959c) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/pwm/argon40,fan-hat.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Argon40 Fan HAT PWM controller
8
9maintainers:
10  - Marek Vasut <marek.vasut+renesas@mailbox.org>
11
12description:
13  The trivial PWM on Argon40 Fan HAT, which is a RaspberryPi blower fan
14  hat which can be controlled over I2C, generates a fixed 30 kHz period
15  PWM signal with configurable 0..100% duty cycle to control the fan
16  speed.
17
18allOf:
19  - $ref: pwm.yaml#
20
21properties:
22  compatible:
23    const: argon40,fan-hat
24
25  reg:
26    maxItems: 1
27
28  "#pwm-cells":
29    const: 3
30
31required:
32  - compatible
33  - reg
34
35additionalProperties: false
36
37examples:
38  - |
39    i2c {
40      #address-cells = <1>;
41      #size-cells = <0>;
42
43      pwm@1a {
44        compatible = "argon40,fan-hat";
45        reg = <0x1a>;
46        #pwm-cells = <3>;
47      };
48    };
49