| Message ID | 1444897847-18040-6-git-send-email-thunder.leizhen@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt index 947863a..4845d44 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt +++ b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt @@ -5,6 +5,12 @@ revisions, replacing the MMIO register interface with in-memory command and event queues and adding support for the ATS and PRI components of the PCIe specification. +Please read ./iommu.txt first, here list something special as below: + +** SMMUv3 limited properties: +- #iommu-cells : fixed to <1>. The pci root device is a special case, + its IDs can be omitted in dts, seems #iommu-cells = <0>. + ** SMMUv3 required properties: - compatible : Should include:
Only support #iommu-cells = <1>. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> --- Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.5.0