Commit ad4ddfac authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Lee Jones
Browse files

dt-bindings: mfd: Add Broadcom's Timer-Watchdog block 



It's a block implementing few time related functions depending on a
(SoC specific) variant. At this point there is ready binding for a
watchdog only. Work on remaining subblocks (e.g. "reg" based reboot) is
in progress.

Signed-off-by: default avatarRafał Miłecki <rafal@milecki.pl>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211115055354.6089-2-zajec5@gmail.com
parent 8ae4069a

Documentation/devicetree/bindings/mfd/brcm,twd.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/mfd/brcm,twd.yaml#

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



title: Broadcom's Timer-Watchdog (aka TWD)



maintainers:

  - Rafał Miłecki <rafal@milecki.pl>



description: |

  Broadcom has a Timer-Watchdog block used in multiple SoCs (e.g., BCM4908,

  BCM63xx, BCM7038). There are few variants available (they differ slightly in

  registers layout). This block consists of: timers, watchdog and optionally a

  software reset handler.



properties:

  compatible:

    items:

      - enum:

          - brcm,bcm4908-twd

          - brcm,bcm7038-twd

      - const: simple-mfd

      - const: syscon



  reg:

    maxItems: 1



  ranges: true



  "#address-cells":

    const: 1



  "#size-cells":

    const: 1



patternProperties:

  '^watchdog@[a-f0-9]+$':

    $ref: /schemas/watchdog/brcm,bcm7038-wdt.yaml



additionalProperties: false



required:

  - reg



examples:

  - |

    timer-mfd@ff800400 {

        compatible = "brcm,bcm4908-twd", "simple-mfd", "syscon";

        reg = <0xff800400 0x4c>;

        ranges = <0x00000000 0xff800400 0x4c>;



        #address-cells = <1>;

        #size-cells = <1>;



        watchdog@28 {

            compatible = "brcm,bcm7038-wdt";

            reg = <0x28 0x8>;

        };

    };