mirror of https://gitee.com/openkylin/linux.git
arm64: allwinner: a64: Add devicetree binding for DMA controller
The A64 is register compatible with the H3, but has a different number of dma channels and request ports. Attach additional properties to the node to allow future reuse of the compatible for controllers with different number of channels/requests. If dma-requests is not specified, the register layout defined maximum of 32 is used. Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
parent
500fa9e76b
commit
d93cc0e788
|
@ -27,6 +27,32 @@ Example:
|
|||
#dma-cells = <1>;
|
||||
};
|
||||
|
||||
------------------------------------------------------------------------------
|
||||
For A64 DMA controller:
|
||||
|
||||
Required properties:
|
||||
- compatible: "allwinner,sun50i-a64-dma"
|
||||
- dma-channels: Number of DMA channels supported by the controller.
|
||||
Refer to Documentation/devicetree/bindings/dma/dma.txt
|
||||
- all properties above, i.e. reg, interrupts, clocks, resets and #dma-cells
|
||||
|
||||
Optional properties:
|
||||
- dma-requests: Number of DMA request signals supported by the controller.
|
||||
Refer to Documentation/devicetree/bindings/dma/dma.txt
|
||||
|
||||
Example:
|
||||
dma: dma-controller@1c02000 {
|
||||
compatible = "allwinner,sun50i-a64-dma";
|
||||
reg = <0x01c02000 0x1000>;
|
||||
interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
|
||||
clocks = <&ccu CLK_BUS_DMA>;
|
||||
dma-channels = <8>;
|
||||
dma-requests = <27>;
|
||||
resets = <&ccu RST_BUS_DMA>;
|
||||
#dma-cells = <1>;
|
||||
};
|
||||
------------------------------------------------------------------------------
|
||||
|
||||
Clients:
|
||||
|
||||
DMA clients connected to the A31 DMA controller must use the format
|
||||
|
|
Loading…
Reference in New Issue