| Message ID | 20240927065041.15247-2-macpaul.lin@mediatek.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v3,1/5] arm64: dts: mt8195: Fix dtbs_check error for infracfg_ao node | expand |
On Fri, Sep 27, 2024 at 02:50:38PM +0800, Macpaul Lin wrote: > The infra-iommu node in mt8195.dtsi was triggering a CHECK_DTBS error due > to an excessively long 'interrupts' property. The error message was: > > infra-iommu@10315000: interrupts: [[0, 795, 4, 0], [0, 796, 4, 0], > [0, 797, 4, 0], [0, 798, 4, 0], [0, 799, 4, 0]] > is too long > > To address this issue, update the compatbile matching rule for > 'interrupts' property. This change allows flexibility in the number > of interrupts for new SoCs like MT8195. > The purpose of these 5 interrupts is also added into description. > > Fixes: bca28426805d ("dt-bindings: iommu: mediatek: Convert IOMMU to DT schema") > Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com> > --- > .../bindings/iommu/mediatek,iommu.yaml | 25 ++++++++++++++++++- > 1 file changed, 24 insertions(+), 1 deletion(-) > > Changes for v2: > - commit message: re-formatting and add a description of adding 5 interrupts. > - add 'description' and 'maxItems: 5' for 'interrupt' property of > 'mt8195-iommu-infra' > - others keeps 'maxItems: 1' > > Changes for v3: > - Refine the description for 'interrupts' property and fixes the compatible > matching rules. > - Refine commit message. > > diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml > index ea6b0f5f24de..10e2bb0f0704 100644 > --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml > +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml > @@ -96,7 +96,13 @@ properties: > maxItems: 1 > > interrupts: > - maxItems: 1 This does not make sense and was not here at v2. Keep constraints at top level. This is how variable-length lists are created: https://elixir.bootlin.com/linux/v6.11-rc6/source/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml#L127 Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml index ea6b0f5f24de..10e2bb0f0704 100644 --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml @@ -96,7 +96,13 @@ properties: maxItems: 1 interrupts: - maxItems: 1 + description: | + Usually, the IOMMU requires only 1 interrupt. + + The IOMMU of MT8195 has 5 banks: 0/1/2/3/4. + Each bank has a set of APB registers corresponding to the + normal world, protected world 1/2/3, and secure world, respectively. + Therefore, 5 interrupt numbers are needed for MT8195. clocks: items: @@ -210,6 +216,23 @@ allOf: required: - mediatek,larbs + - if: + properties: + compatible: + contains: + enum: + - mediatek,mt8195-iommu-infra + + then: + properties: + interrupts: + maxItems: 5 + + else: + properties: + interrupts: + maxItems: 1 + additionalProperties: false examples:
The infra-iommu node in mt8195.dtsi was triggering a CHECK_DTBS error due to an excessively long 'interrupts' property. The error message was: infra-iommu@10315000: interrupts: [[0, 795, 4, 0], [0, 796, 4, 0], [0, 797, 4, 0], [0, 798, 4, 0], [0, 799, 4, 0]] is too long To address this issue, update the compatbile matching rule for 'interrupts' property. This change allows flexibility in the number of interrupts for new SoCs like MT8195. The purpose of these 5 interrupts is also added into description. Fixes: bca28426805d ("dt-bindings: iommu: mediatek: Convert IOMMU to DT schema") Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com> --- .../bindings/iommu/mediatek,iommu.yaml | 25 ++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) Changes for v2: - commit message: re-formatting and add a description of adding 5 interrupts. - add 'description' and 'maxItems: 5' for 'interrupt' property of 'mt8195-iommu-infra' - others keeps 'maxItems: 1' Changes for v3: - Refine the description for 'interrupts' property and fixes the compatible matching rules. - Refine commit message.