2023-08-30 17:31:07 +02:00
|
|
|
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
|
|
|
|
|
# Copyright 2019 BayLibre, SAS
|
|
|
|
|
%YAML 1.2
|
|
|
|
|
---
|
2023-10-24 12:59:35 +02:00
|
|
|
$id: http://devicetree.org/schemas/mailbox/amlogic,meson-gxbb-mhu.yaml#
|
|
|
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
2023-08-30 17:31:07 +02:00
|
|
|
|
|
|
|
|
title: Amlogic Meson Message-Handling-Unit Controller
|
|
|
|
|
|
|
|
|
|
maintainers:
|
|
|
|
|
- Neil Armstrong <neil.armstrong@linaro.org>
|
|
|
|
|
|
|
|
|
|
description: |
|
|
|
|
|
The Amlogic's Meson SoCs Message-Handling-Unit (MHU) is a mailbox controller
|
|
|
|
|
that has 3 independent channels/links to communicate with remote processor(s).
|
|
|
|
|
MHU links are hardwired on a platform. A link raises interrupt for any
|
|
|
|
|
received data. However, there is no specified way of knowing if the sent
|
|
|
|
|
data has been read by the remote. This driver assumes the sender polls
|
|
|
|
|
STAT register and the remote clears it after having read the data.
|
|
|
|
|
|
|
|
|
|
properties:
|
|
|
|
|
compatible:
|
|
|
|
|
enum:
|
|
|
|
|
- amlogic,meson-gxbb-mhu
|
|
|
|
|
|
|
|
|
|
reg:
|
|
|
|
|
maxItems: 1
|
|
|
|
|
|
|
|
|
|
interrupts:
|
|
|
|
|
minItems: 3
|
|
|
|
|
description:
|
|
|
|
|
Contains the interrupt information corresponding to each of the 3 links
|
|
|
|
|
of MHU.
|
|
|
|
|
|
|
|
|
|
"#mbox-cells":
|
|
|
|
|
const: 1
|
|
|
|
|
|
|
|
|
|
required:
|
|
|
|
|
- compatible
|
|
|
|
|
- reg
|
|
|
|
|
- interrupts
|
|
|
|
|
- "#mbox-cells"
|
|
|
|
|
|
|
|
|
|
additionalProperties: false
|
|
|
|
|
|
|
|
|
|
examples:
|
|
|
|
|
- |
|
|
|
|
|
mailbox@c883c404 {
|
|
|
|
|
compatible = "amlogic,meson-gxbb-mhu";
|
|
|
|
|
reg = <0xc883c404 0x4c>;
|
|
|
|
|
interrupts = <208>, <209>, <210>;
|
|
|
|
|
#mbox-cells = <1>;
|
|
|
|
|
};
|
