From 656d7077d8ffd1c2492d4a0a354367ab2e545059 Mon Sep 17 00:00:00 2001 From: Daniel Kurtz Date: Mon, 3 Nov 2014 10:53:28 +0800 Subject: [PATCH] dt-bindings: iommu: Add documentation for rockchip iommu Add binding documentation for Rockchip IOMMU. Signed-off-by: Daniel Kurtz Signed-off-by: Simon Xue Reviewed-by: Heiko Stuebner Signed-off-by: Joerg Roedel --- .../bindings/iommu/rockchip,iommu.txt | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/iommu/rockchip,iommu.txt diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt new file mode 100644 index 000000000000..9a55ac3735e5 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt @@ -0,0 +1,26 @@ +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 = ; + interrupt-names = "vopl_mmu"; + #iommu-cells = <0>; + }; -- 2.20.1