On Tue, Sep 22, 2026 at 09:45:06PM +0100, Karunika Choo wrote: > Mali 5th-Gen AM GPUs expose arbitration registers outside the GPU node. > The arbitration device contains partition-control and resource-group > register blocks used to grant, yield, and close access windows. > > Document partition and resource-group child nodes, each with its own > register range, interrupt and hardware ID. > > Signed-off-by: Karunika Choo <[email protected]> > --- > .../gpu/arm,mali-gen5-am-arbitration.yaml | 125 ++++++++++++++++++ > .../bindings/gpu/arm,mali-gen5-am-system.yaml | 9 ++ > 2 files changed, 134 insertions(+) > create mode 100644 > Documentation/devicetree/bindings/gpu/arm,mali-gen5-am-arbitration.yaml > > diff --git > a/Documentation/devicetree/bindings/gpu/arm,mali-gen5-am-arbitration.yaml > b/Documentation/devicetree/bindings/gpu/arm,mali-gen5-am-arbitration.yaml > new file mode 100644 > index 0000000000000..9ea2b4bb9a344 > --- /dev/null > +++ b/Documentation/devicetree/bindings/gpu/arm,mali-gen5-am-arbitration.yaml > @@ -0,0 +1,125 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +# Copyright 2026 ARM Limited. All rights reserved. > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/gpu/arm,mali-gen5-am-arbitration.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: ARM Mali 5th-Gen GPU Arbitration Device > + > +maintainers: > + - Liviu Dudau <[email protected]> > + - Boris Brezillon <[email protected]> > + > +description: > + The arbitration device manages partition-control and resource-group blocks. > + Each block is described by a child node with its own register range, > + interrupt and hardware ID. Partition and resource-group IDs are separate > + namespaces. Access-window IDs are global to the GPU. > + > +properties: > + $nodename: > + const: panthor-arbitration
Same comments. I stopped review here except one more point: > + > + compatible: > + const: arm,mali-gen5-am-arbitration > + > + "#address-cells": true > + > + "#size-cells": true > + > + ranges: true > + > +patternProperties: > + "^partition@[0-9a-f]+$": > + type: object > + additionalProperties: false > + description: > + Partition control block and its initial resource assignments. > + > + properties: > + reg: > + maxItems: 1 > + description: Partition control register range. > + > + interrupts: > + maxItems: 1 > + description: Partition control interrupt. > + > + arm,id: > + $ref: /schemas/types.yaml#/definitions/uint32 IDs are not allowed. See writing bindings or DTS101 slides. Best regards, Krzysztof
