On Fri, Sep 12, 2025 at 08:37:03PM +0200, Nicolas Frattaroli wrote: > The MediaTek MT8196 SoC includes an embedded MCU referred to as "GPUEB", > acting as glue logic to control power and frequency of the Mali GPU. > This MCU runs special-purpose firmware for this use, and the main > application processor communicates with it through a mailbox. > > Add a binding that describes this mailbox. > > Signed-off-by: Nicolas Frattaroli <nicolas.frattar...@collabora.com> > --- > .../mailbox/mediatek,mt8196-gpueb-mbox.yaml | 64 > ++++++++++++++++++++++ > 1 file changed, 64 insertions(+) > > diff --git > a/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-gpueb-mbox.yaml > b/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-gpueb-mbox.yaml > new file mode 100644 > index > 0000000000000000000000000000000000000000..56508f406fce88c7c1699aa67b57394fc7b1c357 > --- /dev/null > +++ > b/Documentation/devicetree/bindings/mailbox/mediatek,mt8196-gpueb-mbox.yaml > @@ -0,0 +1,64 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mailbox/mediatek,mt8196-gpueb-mbox.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: MediaTek MFlexGraphics GPUEB Mailbox Controller > + > +maintainers: > + - Nicolas Frattaroli <nicolas.frattar...@collabora.com> > + > +properties: > + compatible: > + enum: > + - mediatek,mt8196-gpueb-mbox > + > + reg: > + items: > + - description: mailbox data registers > + - description: mailbox control registers > + > + reg-names: > + items: > + - const: data > + - const: ctl > + > + clocks: > + items: > + - description: main clock of the GPUEB MCU > + > + interrupts: > + items: > + - description: fires when a new message is received > + > + "#mbox-cells": > + const: 1 > + description: > + The number of the mailbox channel. > + > +required: > + - compatible > + - reg > + - reg-names > + - clocks > + - interrupts > + - "#mbox-cells" > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/clock/mediatek,mt8196-clock.h> > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/interrupt-controller/irq.h> > + > + gpueb_mbox: mailbox@4b09fd80 {
drop the label, but otherwise this binding looks okay to me. Acked-by: Conor Dooley <conor.doo...@microchip.com> > + compatible = "mediatek,mt8196-gpueb-mbox"; > + reg = <0x4b09fd80 0x280>, > + <0x4b170000 0x7c>; > + reg-names = "data", "ctl"; > + clocks = <&topckgen CLK_TOP_MFG_EB>; > + interrupts = <GIC_SPI 608 IRQ_TYPE_LEVEL_HIGH 0>; > + #mbox-cells = <1>; > + }; > > -- > 2.51.0 >
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