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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (C) 2023 Aspeed, Inc.
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/aspeed,g6-pwm-tach.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ASPEED G6 PWM and Fan Tach controller
maintainers:
- Billy Tsai <billy_tsai@aspeedtech.com>
description: |
The ASPEED PWM controller can support up to 16 PWM outputs.
The ASPEED Fan Tacho controller can support up to 16 fan tach input.
They are independent hardware blocks, which are different from the
previous version of the ASPEED chip.
properties:
compatible:
enum:
- aspeed,ast2600-pwm-tach
reg:
maxItems: 1
clocks:
maxItems: 1
resets:
maxItems: 1
"#pwm-cells":
const: 3
patternProperties:
"^fan-[0-9]+$":
$ref: fan-common.yaml#
unevaluatedProperties: false
required:
- tach-ch
required:
- reg
- clocks
- resets
- "#pwm-cells"
- compatible
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/aspeed-clock.h>
pwm_tach: pwm-tach-controller@1e610000 {
compatible = "aspeed,ast2600-pwm-tach";
reg = <0x1e610000 0x100>;
clocks = <&syscon ASPEED_CLK_AHB>;
resets = <&syscon ASPEED_RESET_PWM>;
#pwm-cells = <3>;
fan-0 {
tach-ch = /bits/ 8 <0x0>;
pwms = <&pwm_tach 0 40000 0>;
};
fan-1 {
tach-ch = /bits/ 8 <0x1 0x2>;
pwms = <&pwm_tach 1 40000 0>;
};
};
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