mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
656d7077d8
Add binding documentation for Rockchip IOMMU. Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Simon Xue <xxm@rock-chips.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
27 lines
971 B
Plaintext
27 lines
971 B
Plaintext
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>;
|
|
};
|