Commit df9d235c authored by Billy Tsai's avatar Billy Tsai Committed by Guenter Roeck
Browse files

dt-bindings: hwmon: Support Aspeed g6 PWM TACH Control 



Document the compatible for aspeed,ast2600-pwm-tach device, which can
support up to 16 PWM outputs and 16 fan tach input.

Signed-off-by: default avatarBilly Tsai <billy_tsai@aspeedtech.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240221104025.1306227-3-billy_tsai@aspeedtech.com


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 3b0ac1f9

Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml

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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>;

      };

    };