[PATCH] dt-bindings: iommu: Describe MT8195 infra IRQs
From: "Rob Herring (Arm)" <robh@kernel.org>
Date: 2026-09-21 23:27:36
Also in:
linux-devicetree, linux-iommu, linux-mediatek, lkml
Subsystem:
arm/mediatek soc support, iommu subsystem, mediatek iommu driver, open firmware and flattened device tree bindings, the rest · Maintainers:
Matthias Brugger, AngeloGioacchino Del Regno, Joerg Roedel, Will Deacon, Yong Wu, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The MT8195 infra IOMMU has one fault interrupt per IOMMU bank. Require the five bank interrupts, named bank0 through bank4, for this compatible. Keep other MediaTek IOMMUs limited to one unnamed interrupt. Assisted-by: LLM Signed-off-by: Rob Herring (Arm) <robh@kernel.org> --- .../bindings/iommu/mediatek,iommu.yaml | 30 ++++++++++++++++++- arch/arm64/boot/dts/mediatek/mt8195.dtsi | 2 ++ 2 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
index 79c573c47b08..4dc5621c17e1 100644
--- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
+++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml@@ -100,7 +100,11 @@ properties: maxItems: 1 interrupts: - maxItems: 1 + minItems: 1 + maxItems: 5 + + interrupt-names: + description: Names of IOMMU banks providing fault interrupts. clocks: items:
@@ -155,6 +159,30 @@ required: - '#iommu-cells' allOf: + - if: + properties: + compatible: + contains: + const: mediatek,mt8195-iommu-infra + then: + properties: + interrupts: + minItems: 5 + interrupt-names: + items: + - const: bank0 + - const: bank1 + - const: bank2 + - const: bank3 + - const: bank4 + required: + - interrupt-names + else: + properties: + interrupts: + maxItems: 1 + interrupt-names: false + - if: properties: compatible:
diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 9aaf8b6edcb5..3e46ffaa44c6 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi@@ -937,6 +937,8 @@ iommu_infra: infra-iommu@10315000 { <GIC_SPI 797 IRQ_TYPE_LEVEL_HIGH 0>, <GIC_SPI 798 IRQ_TYPE_LEVEL_HIGH 0>, <GIC_SPI 799 IRQ_TYPE_LEVEL_HIGH 0>; + interrupt-names = "bank0", "bank1", "bank2", "bank3", + "bank4"; #iommu-cells = <1>; };
--
2.53.0