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| author | Robin Murphy <robin.murphy@arm.com> | 2016-09-12 19:13:43 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-09-16 11:34:16 +0300 |
| commit | b9bc88118029d20f25f9e457a147de65ada00f7c (patch) | |
| tree | c73b4c63dfa0880961625703f460d305b5c21647 /Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt | |
| parent | 57f98d2f61e191ef9d06863c9ce3f8621f3671ef (diff) | |
| download | linux-b9bc88118029d20f25f9e457a147de65ada00f7c.tar.xz | |
Docs: dt: document ARM SMMUv3 generic binding usage
We're about to ratify our use of the generic binding, so document it.
CC: Rob Herring <robh+dt@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt index 7b94c88cf2ee..be57550e14e4 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt +++ b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt @@ -27,6 +27,12 @@ the PCIe specification. * "cmdq-sync" - CMD_SYNC complete * "gerror" - Global Error activated +- #iommu-cells : See the generic IOMMU binding described in + devicetree/bindings/pci/pci-iommu.txt + for details. For SMMUv3, must be 1, with each cell + describing a single stream ID. All possible stream + IDs which a device may emit must be described. + ** SMMUv3 optional properties: - dma-coherent : Present if DMA operations made by the SMMU (page @@ -54,6 +60,6 @@ the PCIe specification. <GIC_SPI 79 IRQ_TYPE_EDGE_RISING>; interrupt-names = "eventq", "priq", "cmdq-sync", "gerror"; dma-coherent; - #iommu-cells = <0>; + #iommu-cells = <1>; msi-parent = <&its 0xff0000>; }; |