1 Analog Devices AXI-DMAC DMA controller
2
3 Required properties:
4 - compatible: Must be "adi,axi-dmac-1.00.a".
5 - reg: Specification for the controllers memory mapped register map.
6 - interrupts: Specification for the controllers interrupt.
7 - clocks: Phandle and specifier to the controllers AXI interface clock
8 - #dma-cells: Must be 1.
9
10 Required sub-nodes:
11 - adi,channels: This sub-node must contain a sub-node for each DMA channel. For
12 the channel sub-nodes the following bindings apply. They must match the
13 configuration options of the peripheral as it was instantiated.
14
15 Required properties for adi,channels sub-node:
16 - #size-cells: Must be 0
17 - #address-cells: Must be 1
18
19 Required channel sub-node properties:
20 - reg: Which channel this node refers to.
21 - adi,source-bus-width,
22 adi,destination-bus-width: Width of the source or destination bus in bits.
23 - adi,source-bus-type,
24 adi,destination-bus-type: Type of the source or destination bus. Must be one
25 of the following:
26 0 (AXI_DMAC_TYPE_AXI_MM): Memory mapped AXI interface
27 1 (AXI_DMAC_TYPE_AXI_STREAM): Streaming AXI interface
28 2 (AXI_DMAC_TYPE_AXI_FIFO): FIFO interface
29
30 Deprecated optional channel properties:
31 - adi,length-width: Width of the DMA transfer length register.
32 - adi,cyclic: Must be set if the channel supports hardware cyclic DMA
33 transfers.
34 - adi,2d: Must be set if the channel supports hardware 2D DMA transfers.
35
36 DMA clients connected to the AXI-DMAC DMA controller must use the format
37 described in the dma.txt file using a one-cell specifier. The value of the
38 specifier refers to the DMA channel index.
39
40 Example:
41
42 dma: dma@7c420000 {
43 compatible = "adi,axi-dmac-1.00.a";
44 reg = <0x7c420000 0x10000>;
45 interrupts = <0 57 0>;
46 clocks = <&clkc 16>;
47 #dma-cells = <1>;
48
49 adi,channels {
50 #size-cells = <0>;
51 #address-cells = <1>;
52
53 dma-channel@0 {
54 reg = <0>;
55 adi,source-bus-width = <32>;
56 adi,source-bus-type = <ADI_AXI_DMAC_TYPE_MM_AXI>;
57 adi,destination-bus-width = <64>;
58 adi,destination-bus-type = <ADI_AXI_DMAC_TYPE_FIFO>;
59 };
60 };
61 };
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