40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
|
Synopsys DesignWare AXI DMA Controller
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible: "snps,axi-dma-1.01a"
|
||
|
|
- reg: Address range of the DMAC registers. This should include
|
||
|
|
all of the per-channel registers.
|
||
|
|
- interrupt: Should contain the DMAC interrupt number.
|
||
|
|
- dma-channels: Number of channels supported by hardware.
|
||
|
|
- snps,dma-masters: Number of AXI masters supported by the hardware.
|
||
|
|
- snps,data-width: Maximum AXI data width supported by hardware.
|
||
|
|
(0 - 8bits, 1 - 16bits, 2 - 32bits, ..., 6 - 512bits)
|
||
|
|
- snps,priority: Priority of channel. Array size is equal to the number of
|
||
|
|
dma-channels. Priority value must be programmed within [0:dma-channels-1]
|
||
|
|
range. (0 - minimum priority)
|
||
|
|
- snps,block-size: Maximum block size supported by the controller channel.
|
||
|
|
Array size is equal to the number of dma-channels.
|
||
|
|
|
||
|
|
Optional properties:
|
||
|
|
- snps,axi-max-burst-len: Restrict master AXI burst length by value specified
|
||
|
|
in this property. If this property is missing the maximum AXI burst length
|
||
|
|
supported by DMAC is used. [1:256]
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
dmac: dma-controller@80000 {
|
||
|
|
compatible = "snps,axi-dma-1.01a";
|
||
|
|
reg = <0x80000 0x400>;
|
||
|
|
clocks = <&core_clk>, <&cfgr_clk>;
|
||
|
|
clock-names = "core-clk", "cfgr-clk";
|
||
|
|
interrupt-parent = <&intc>;
|
||
|
|
interrupts = <27>;
|
||
|
|
|
||
|
|
dma-channels = <4>;
|
||
|
|
snps,dma-masters = <2>;
|
||
|
|
snps,data-width = <3>;
|
||
|
|
snps,block-size = <4096 4096 4096 4096>;
|
||
|
|
snps,priority = <0 1 2 3>;
|
||
|
|
snps,axi-max-burst-len = <16>;
|
||
|
|
};
|