xref: /freebsd/sys/contrib/device-tree/Bindings/hwmon/aspeed,g6-pwm-tach.yaml (revision 17b7a0c595a51eaa7e83f16e99e1555bd13a445b) 
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