Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / iommu / rockchip,iommu.txt

diff --git a/kernel/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/kernel/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
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+Rockchip IOMMU
+==============
+
+A Rockchip DRM iommu translates io virtual addresses to physical addresses for
+its master device.  Each slave device is bound to a single master device, and
+shares its clocks, power domain and irq.
+
+Required properties:
+- compatible      : Should be "rockchip,iommu"
+- reg             : Address space for the configuration registers
+- interrupts      : Interrupt specifier for the IOMMU instance
+- interrupt-names : Interrupt name for the IOMMU instance
+- #iommu-cells    : Should be <0>.  This indicates the iommu is a
+                    "single-master" device, and needs no additional information
+                    to associate with its master device.  See:
+                    Documentation/devicetree/bindings/iommu/iommu.txt
+
+Example:
+
+       vopl_mmu: iommu@ff940300 {
+               compatible = "rockchip,iommu";
+               reg = <0xff940300 0x100>;
+               interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+               interrupt-names = "vopl_mmu";
+               #iommu-cells = <0>;
+       };