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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2# Copyright (C) 2023 Aspeed, Inc.3%YAML 1.24---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 controller9 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 the17 previous version of the ASPEED chip.18 19properties:20 compatible:21 enum:22 - aspeed,ast2600-pwm-tach23 24 reg:25 maxItems: 126 27 clocks:28 maxItems: 129 30 resets:31 maxItems: 132 33 "#pwm-cells":34 const: 335 36patternProperties:37 "^fan-[0-9]+$":38 $ref: fan-common.yaml#39 unevaluatedProperties: false40 required:41 - tach-ch42 43required:44 - reg45 - clocks46 - resets47 - "#pwm-cells"48 - compatible49 50additionalProperties: false51 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