dt-bindings: remoteproc: Add the documentation for Meson AO ARC rproc

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

%YAML 1.2

---

$id: "http://devicetree.org/schemas/remoteproc/amlogic,meson-mx-ao-arc-rproc.yaml#"

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

title: Amlogic Meson AO ARC Remote Processor bindings

description:

  Amlogic Meson6, Meson8, Meson8b and Meson8m2 SoCs embed an ARC EM4

  controller for always-on operations, typically used for managing

  system suspend.

maintainers:

  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>

properties:

  compatible:

    const: amlogic,meson-mx-ao-arc-rproc

  firmware-name:

    $ref: /schemas/types.yaml#/definitions/string

    description:

      The name of the firmware which should be loaded for this remote

      processor.

  reg:

    description:

      Address ranges of the remap and CPU control addresses for the

      remote processor.

    minItems: 2

  reg-names:

    items:

      - const: remap

      - const: cpu

  resets:

     minItems: 1

  amlogic,sram:

    $ref: /schemas/types.yaml#/definitions/phandle

    description:

      A phandle to the device SRAM

  amlogic,secbus2:

    $ref: /schemas/types.yaml#/definitions/phandle

    description:

      A phandle to the SECBUS2 region which contains some configuration

      bits of this remote processor

required:

  - compatible

  - reg

  - reg-names

  - resets

  - amlogic,sram

  - amlogic,secbus2

additionalProperties: false

examples:

  - |

    remoteproc@1c {

      compatible= "amlogic,meson-mx-ao-arc-rproc";

      reg = <0x1c 0x8>, <0x38 0x8>;

      reg-names = "remap", "cpu";

      resets = <&media_cpu_reset>;

      amlogic,sram = <&ahb_sram>;

      amlogic,secbus2 = <&secbus2>;

    };

...