Re: [PATCH 1/8] dt-bindings: dma: nvidia,tegra186-gpc-dma: Add iommu-map property
From: Rob Herring (Arm)
Date: Tue Feb 17 2026 - 13:39:26 EST
On Tue, 17 Feb 2026 23:04:50 +0530, Akhil R wrote:
> Add iommu-map property which helps when each channel requires its own
> stream ID for the transfer. Use iommu-map to specify separate stream
> ID for each channel. This enables each channel to be in its own iommu
> domain and keeps the memory isolated from other devices sharing the
> same DMA controller.
>
> Signed-off-by: Akhil R <akhilrajeev@xxxxxxxxxx>
> ---
> .../devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
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/virtio/pci-iommu.example.dtb: pcie@40000000: iommu-map:0: [0, 1, 0, 8, 9, 1, 9, 65527] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/iommu/riscv,iommu.example.dtb: pcie@30000000: iommu-map:0: [0, 4, 0, 8, 9, 4, 9, 65527] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.example.dtb: pcie@1c00000 (qcom,pcie-sc8180x): iommu-map:0: [0, 4294967295, 7552, 1, 256, 4294967295, 7553, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sc8180x.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.example.dtb: pcie@1c00000 (qcom,pcie-sc8180x): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'dma-coherent', 'interconnect-names', 'interconnects', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'phy-names', 'phys', 'power-domains', 'ranges' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sc8180x.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sc8180x.example.dtb: pcie@1c00000 (qcom,pcie-sc8180x): iommu-map:0: [0, 4294967295, 7552, 1, 256, 4294967295, 7553, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8150.example.dtb: pcie@1c00000 (qcom,pcie-sm8150): iommu-map:0: [0, 4294967295, 7552, 1, 256, 4294967295, 7553, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8150.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8150.example.dtb: pcie@1c00000 (qcom,pcie-sm8150): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8150.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8150.example.dtb: pcie@1c00000 (qcom,pcie-sm8150): iommu-map:0: [0, 4294967295, 7552, 1, 256, 4294967295, 7553, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sc7280.example.dtb: pcie@1c08000 (qcom,pcie-sc7280): iommu-map:0: [0, 4294967295, 7296, 1, 256, 4294967295, 7297, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sc7280.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sc7280.example.dtb: pcie@1c08000 (qcom,pcie-sc7280): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'dma-coherent', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'pcie@0', 'power-domains', 'ranges', 'vddpe-3v3-supply' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sc7280.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sc7280.example.dtb: pcie@1c08000 (qcom,pcie-sc7280): iommu-map:0: [0, 4294967295, 7296, 1, 256, 4294967295, 7297, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-x1e80100.example.dtb: pcie@1c08000 (qcom,pcie-x1e80100): iommu-map:0: [0, 4294967295, 5120, 1, 256, 4294967295, 5121, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-x1e80100.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-x1e80100.example.dtb: pcie@1c08000 (qcom,pcie-x1e80100): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'dma-coherent', 'interconnect-names', 'interconnects', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-x1e80100.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-x1e80100.example.dtb: pcie@1c08000 (qcom,pcie-x1e80100): iommu-map:0: [0, 4294967295, 5120, 1, 256, 4294967295, 5121, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sa8775p.example.dtb: pcie@1c00000 (qcom,pcie-sa8775p): iommu-map:0: [0, 4294967295, 0, 1, 256, 4294967295, 1, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sa8775p.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sa8775p.example.dtb: pcie@1c00000 (qcom,pcie-sa8775p): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'dma-coherent', 'interconnect-names', 'interconnects', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sa8775p.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sa8775p.example.dtb: pcie@1c00000 (qcom,pcie-sa8775p): iommu-map:0: [0, 4294967295, 0, 1, 256, 4294967295, 1, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8350.example.dtb: pcie@1c00000 (qcom,pcie-sm8350): iommu-map:0: [0, 4294967295, 7168, 1, 256, 4294967295, 7169, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8350.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8350.example.dtb: pcie@1c00000 (qcom,pcie-sm8350): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8350.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8350.example.dtb: pcie@1c00000 (qcom,pcie-sm8350): iommu-map:0: [0, 4294967295, 7168, 1, 256, 4294967295, 7169, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.example.dtb: pcie@1c00000 (qcom,pcie-sm8450-pcie0): iommu-map:0: [0, 4294967295, 7168, 1, 256, 4294967295, 7169, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8450.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.example.dtb: pcie@1c00000 (qcom,pcie-sm8450-pcie0): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'max-link-speed', 'msi-map', 'msi-map-mask', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8450.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8450.example.dtb: pcie@1c00000 (qcom,pcie-sm8450-pcie0): iommu-map:0: [0, 4294967295, 7168, 1, 256, 4294967295, 7169, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/apple,pcie.example.dtb: pcie@690000000 (apple,t8103-pcie): iommu-map:0: [256, 4294967295, 1, 1, 512, 4294967295, 1, 1, 768, 4294967295, 1, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/apple,pcie.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/apple,pcie.example.dtb: pcie@690000000 (apple,t8103-pcie): Unevaluated properties are not allowed ('#address-cells', '#size-cells', 'bus-range', 'device_type', 'pci@0,0', 'pci@1,0', 'pci@2,0' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/apple,pcie.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/apple,pcie.example.dtb: pcie@690000000 (apple,t8103-pcie): iommu-map:0: [256, 4294967295, 1, 1, 512, 4294967295, 1, 1, 768, 4294967295, 1, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.example.dtb: pcie@1c00000 (qcom,pcie-sm8550): iommu-map:0: [0, 4294967295, 5120, 1, 256, 4294967295, 5121, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8550.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.example.dtb: pcie@1c00000 (qcom,pcie-sm8550): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'dma-coherent', 'interconnect-names', 'interconnects', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8550.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.example.dtb: pcie@1c00000 (qcom,pcie-sm8550): iommu-map:0: [0, 4294967295, 5120, 1, 256, 4294967295, 5121, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8250.example.dtb: pcie@1c00000 (qcom,pcie-sm8250): iommu-map:0: [0, 4294967295, 7168, 1, 256, 4294967295, 7169, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8250.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8250.example.dtb: pcie@1c00000 (qcom,pcie-sm8250): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'dma-coherent', 'interrupt-map', 'interrupt-map-mask', 'iommu-map', 'linux,pci-domain', 'num-lanes', 'perst-gpios', 'phy-names', 'phys', 'power-domains', 'ranges', 'wake-gpios' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sm8250.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sm8250.example.dtb: pcie@1c00000 (qcom,pcie-sm8250): iommu-map:0: [0, 4294967295, 7168, 1, 256, 4294967295, 7169, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.example.dtb: pci@1c00000 (qcom,pcie-sa8255p): iommu-map:0: [0, 4294967295, 0, 1, 256, 4294967295, 1, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sa8255p.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.example.dtb: pci@1c00000 (qcom,pcie-sa8255p): Unevaluated properties are not allowed ('#address-cells', '#interrupt-cells', '#size-cells', 'bus-range', 'device_type', 'interrupt-map', 'interrupt-map-mask', 'linux,pci-domain', 'pcie@0' were unexpected)
from schema $id: http://devicetree.org/schemas/pci/qcom,pcie-sa8255p.yaml
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.example.dtb: pci@1c00000 (qcom,pcie-sa8255p): iommu-map:0: [0, 4294967295, 0, 1, 256, 4294967295, 1, 1] is too long
from schema $id: http://devicetree.org/schemas/pci/pci-iommu.yaml
doc reference errors (make refcheckdocs):
See https://patchwork.kernel.org/project/devicetree/patch/20260217173457.18628-2-akhilrajeev@xxxxxxxxxx
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.