dt-bindings: mailbox: Document the Meson MX AO ARC mailbox

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

%YAML 1.2

---

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

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

title: Amlogic Meson AO ARC Remote Processor mailbox bindings

description:

  Amlogic Meson6, Meson8, Meson8b and Meson8m2 SoCs have a mailbox

  to communicate with the embedded an ARC EM4 core.

maintainers:

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

properties:

  compatible:

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

  reg:

    minItems: 1

  "#mbox-cells":

    const: 1

required:

  - compatible

  - reg

  - "#mbox-cells"

additionalProperties: false

examples:

  - |

    mailbox@0 {

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

      reg = <0x0 0xc>;

      #mbox-cells = <1>;

    };

...