| Tom Rini | 6bb92fc | 2024-05-20 09:54:58 -0600 | [diff] [blame^] | 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 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 7 | |
| 8 | title: ASPEED G6 PWM and Fan Tach controller |
| 9 | |
| 10 | maintainers: |
| 11 | - Billy Tsai <billy_tsai@aspeedtech.com> |
| 12 | |
| 13 | description: | |
| 14 | The ASPEED PWM controller can support up to 16 PWM outputs. |
| 15 | The ASPEED Fan Tacho controller can support up to 16 fan tach input. |
| 16 | They are independent hardware blocks, which are different from the |
| 17 | previous version of the ASPEED chip. |
| 18 | |
| 19 | properties: |
| 20 | compatible: |
| 21 | enum: |
| 22 | - aspeed,ast2600-pwm-tach |
| 23 | |
| 24 | reg: |
| 25 | maxItems: 1 |
| 26 | |
| 27 | clocks: |
| 28 | maxItems: 1 |
| 29 | |
| 30 | resets: |
| 31 | maxItems: 1 |
| 32 | |
| 33 | "#pwm-cells": |
| 34 | const: 3 |
| 35 | |
| 36 | patternProperties: |
| 37 | "^fan-[0-9]+$": |
| 38 | $ref: fan-common.yaml# |
| 39 | unevaluatedProperties: false |
| 40 | required: |
| 41 | - tach-ch |
| 42 | |
| 43 | required: |
| 44 | - reg |
| 45 | - clocks |
| 46 | - resets |
| 47 | - "#pwm-cells" |
| 48 | - compatible |
| 49 | |
| 50 | additionalProperties: false |
| 51 | |
| 52 | examples: |
| 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 | }; |