@@ -96,7 +96,15 @@ 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.
+ minItems: 1
+ maxItems: 5
clocks:
items:
@@ -210,6 +218,24 @@ allOf:
required:
- mediatek,larbs
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - mediatek,mt8195-iommu-infra
+
+ then:
+ properties:
+ interrupts:
+ minItems: 5
+ 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 | 28 ++++++++++++++++++- 1 file changed, 27 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. Changes for v4: - add missing 'minItems: 5' to 'mediatek,mt8195-iommu-infra'. Thanks the explanation from Conor and Krzysztof.