1Analog Device AXI-DMAC DMA controller 2 3Required 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 10Required 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 15Required properties for adi,channels sub-node: 16 - #size-cells: Must be 0 17 - #address-cells: Must be 1 18 19Required channel sub-node properties: 20 - reg: Which channel this node refers to. 21 - adi,length-width: Width of the DMA transfer length register. 22 - adi,source-bus-width, 23 adi,destination-bus-width: Width of the source or destination bus in bits. 24 - adi,source-bus-type, 25 adi,destination-bus-type: Type of the source or destination bus. Must be one 26 of the following: 27 0 (AXI_DMAC_TYPE_AXI_MM): Memory mapped AXI interface 28 1 (AXI_DMAC_TYPE_AXI_STREAM): Streaming AXI interface 29 2 (AXI_DMAC_TYPE_AXI_FIFO): FIFO interface 30 31Optional channel properties: 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 36DMA clients connected to the AXI-DMAC DMA controller must use the format 37described in the dma.txt file using a one-cell specifier. The value of the 38specifier refers to the DMA channel index. 39 40Example: 41 42dma: 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}; 62