xref: /freebsd/sys/contrib/device-tree/Bindings/hwmon/aspeed,g6-pwm-tach.yaml (revision 7c31cdfa408a4ebce7a3e10d29056a15c28bc092) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2# Copyright (C) 2023 Aspeed, Inc.
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/hwmon/aspeed,g6-pwm-tach.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: ASPEED G6 PWM and Fan Tach controller
9
10maintainers:
11  - Billy Tsai <billy_tsai@aspeedtech.com>
12
13description: |
14  The ASPEED PWM controller can support up to 16 PWM outputs.
15  The ASPEED Fan Tacho controller can support up to 16 fan tach input.
16  They are independent hardware blocks, which are different from the
17  previous version of the ASPEED chip.
18
19properties:
20  compatible:
21    enum:
22      - aspeed,ast2600-pwm-tach
23
24  reg:
25    maxItems: 1
26
27  clocks:
28    maxItems: 1
29
30  resets:
31    maxItems: 1
32
33  "#pwm-cells":
34    const: 3
35
36patternProperties:
37  "^fan-[0-9]+$":
38    $ref: fan-common.yaml#
39    unevaluatedProperties: false
40    required:
41      - tach-ch
42
43required:
44  - reg
45  - clocks
46  - resets
47  - "#pwm-cells"
48  - compatible
49
50additionalProperties: false
51
52examples:
53  - |
54    #include <dt-bindings/clock/aspeed-clock.h>
55    pwm_tach: pwm-tach-controller@1e610000 {
56      compatible = "aspeed,ast2600-pwm-tach";
57      reg = <0x1e610000 0x100>;
58      clocks = <&syscon ASPEED_CLK_AHB>;
59      resets = <&syscon ASPEED_RESET_PWM>;
60      #pwm-cells = <3>;
61
62      fan-0 {
63        tach-ch = /bits/ 8 <0x0>;
64        pwms = <&pwm_tach 0 40000 0>;
65      };
66
67      fan-1 {
68        tach-ch = /bits/ 8 <0x1 0x2>;
69        pwms = <&pwm_tach 1 40000 0>;
70      };
71    };
72