[RFC PATCH 1/8] dt-bindings: iommu: mediatek: Add mt8196 support

[Rob Herring (Arm)]

On Mon, 16 Jun 2025 10:56:07 +0800, Xueqi Zhang wrote:
> 1. Mediatek has its own implementation for wrapper interrupts and
> power management. Add the SoC specific compatible for MT8196
> implementing arm,smmu-v3.
> 2. APU SMMU need wait until its power is ready, thus add a phandle
> smmu-mediatek-parents to its power node.
> 
> Signed-off-by: Xueqi Zhang <xueqi.zhang at mediatek.com>
> ---
>  .../bindings/iommu/arm,smmu-v3.yaml           | 24 ++++++++++++++++++-
>  1 file changed, 23 insertions(+), 1 deletion(-)
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml: ignoring, error in schema: properties: compatible
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml: properties:compatible: [{'description': 'MediaTek SoCs implementing "arm,smmu-v3"', 'items': [{'enum': ['mediatek,mt8196-apu-smmu', 'mediatek,mt8196-mm-smmu']}, {'const': 'arm,smmu-v3'}]}] is not of type 'object', 'boolean'
	from schema $id: http://json-schema.org/draft-07/schema#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/iommu/arm,smmu-v3.yaml: properties:compatible: [{'description': 'MediaTek SoCs implementing "arm,smmu-v3"', 'items': [{'enum': ['mediatek,mt8196-apu-smmu', 'mediatek,mt8196-mm-smmu']}, {'const': 'arm,smmu-v3'}]}] is not of type 'object', 'boolean'
	from schema $id: http://devicetree.org/meta-schemas/keywords.yaml#
Documentation/devicetree/bindings/iommu/arm,smmu-v3.example.dtb: /example-0/iommu at 2b400000: failed to match any schema with compatible: ['arm,smmu-v3']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250616025628.25454-2-xueqi.zhang@mediatek.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.