Commit 5b606ae8 authored by Rob Herring's avatar Rob Herring Committed by Wim Van Sebroeck
Browse files

dt-bindings: watchdog: Convert arm,sbsa-gwdt to DT schema 



Convert the arm,sbsa-gwdt binding to DT schema format.

Cc: Wim Van Sebroeck <wim@linux-watchdog.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Fu Wei <fu.wei@linaro.org>
Cc: linux-watchdog@vger.kernel.org
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarGuenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210607194022.3095736-1-robh@kernel.org


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@linux-watchdog.org>
parent 12dbbf08

Documentation/devicetree/bindings/watchdog/arm,sbsa-gwdt.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/watchdog/arm,sbsa-gwdt.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: SBSA (Server Base System Architecture) Generic Watchdog



maintainers:

  - Fu Wei <fu.wei@linaro.org>



description: |

  The SBSA Generic Watchdog Timer is used to force a reset of the system after

  two stages of timeout have elapsed. A detailed definition of the watchdog

  timer can be found in the ARM document: ARM-DEN-0029 - Server Base System

  Architecture (SBSA)



allOf:

  - $ref: watchdog.yaml#



properties:

  compatible:

    const: arm,sbsa-gwdt



  reg:

    items:

      - description: Watchdog control frame

      - description: Refresh frame



  interrupts:

    description: The Watchdog Signal 0 (WS0) SPI (Shared Peripheral Interrupt)

    maxItems: 1



required:

  - compatible

  - reg

  - interrupts



unevaluatedProperties: false



examples:

  - |



    watchdog@2a440000 {

        compatible = "arm,sbsa-gwdt";

        reg = <0x2a440000 0x1000>,

              <0x2a450000 0x1000>;

        interrupts = <0 27 4>;

        timeout-sec = <30>;

    };

...

Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt

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* SBSA (Server Base System Architecture) Generic Watchdog



The SBSA Generic Watchdog Timer is used to force a reset of the system

after two stages of timeout have elapsed.  A detailed definition of the

watchdog timer can be found in the ARM document: ARM-DEN-0029 - Server

Base System Architecture (SBSA)



Required properties:

- compatible: Should at least contain "arm,sbsa-gwdt".



- reg: Each entry specifies the base physical address of a register frame

  and the length of that frame; currently, two frames must be defined,

  in this order:

  1: Watchdog control frame;

  2: Refresh frame.



- interrupts: Should contain the Watchdog Signal 0 (WS0) SPI (Shared

  Peripheral Interrupt) number of SBSA Generic Watchdog.



Optional properties

- timeout-sec: Watchdog timeout values (in seconds).



Example for FVP Foundation Model v8:



watchdog@2a440000 {

	compatible = "arm,sbsa-gwdt";

	reg = <0x0 0x2a440000 0 0x1000>,

	      <0x0 0x2a450000 0 0x1000>;

	interrupts = <0 27 4>;

	timeout-sec = <30>;

};