Add binding documentation for Rockchip IOMMU.
Signed-off-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
Signed-off-by: Simon Xue <xxm@xxxxxxxxxxxxxx>
Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx>
---
.../devicetree/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 0000000..9a55ac3
--- /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 = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "vopl_mmu";
+ #iommu-cells = <0>;
+ };
--
2.1.0.rc2.206.gedb03e5
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