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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mailbox/mediatek,gce-mailbox.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Mediatek Global Command Engine Mailbox
maintainers:
- Houlong Wei <houlong.wei@mediatek.com>
description:
The Global Command Engine (GCE) is used to help read/write registers with
critical time limitation, such as updating display configuration during the
vblank. The GCE can be used to implement the Command Queue (CMDQ) driver.
properties:
compatible:
oneOf:
- enum:
- mediatek,mt6779-gce
- mediatek,mt8173-gce
- mediatek,mt8183-gce
- mediatek,mt8186-gce
- mediatek,mt8188-gce
- mediatek,mt8192-gce
- mediatek,mt8195-gce
- items:
- const: mediatek,mt6795-gce
- const: mediatek,mt8173-gce
"#mbox-cells":
const: 2
description:
The first cell describes the Thread ID of the GCE,
the second cell describes the priority of the GCE thread
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
items:
- description: Global Command Engine clock
clock-names:
items:
- const: gce
required:
- compatible
- "#mbox-cells"
- reg
- interrupts
- clocks
allOf:
- if:
not:
properties:
compatible:
contains:
const: mediatek,mt8195-gce
then:
required:
- clock-names
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/mt8173-clk.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
soc {
#address-cells = <2>;
#size-cells = <2>;
gce: mailbox@10212000 {
compatible = "mediatek,mt8173-gce";
reg = <0 0x10212000 0 0x1000>;
interrupts = <GIC_SPI 135 IRQ_TYPE_LEVEL_LOW>;
#mbox-cells = <2>;
clocks = <&infracfg CLK_INFRA_GCE>;
clock-names = "gce";
};
};
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