0001 Analog Devices AXI-DMAC DMA controller
0002
0003 Required properties:
0004 - compatible: Must be "adi,axi-dmac-1.00.a".
0005 - reg: Specification for the controllers memory mapped register map.
0006 - interrupts: Specification for the controllers interrupt.
0007 - clocks: Phandle and specifier to the controllers AXI interface clock
0008 - #dma-cells: Must be 1.
0009
0010 Required sub-nodes:
0011 - adi,channels: This sub-node must contain a sub-node for each DMA channel. For
0012 the channel sub-nodes the following bindings apply. They must match the
0013 configuration options of the peripheral as it was instantiated.
0014
0015 Required properties for adi,channels sub-node:
0016 - #size-cells: Must be 0
0017 - #address-cells: Must be 1
0018
0019 Required channel sub-node properties:
0020 - reg: Which channel this node refers to.
0021 - adi,source-bus-width,
0022 adi,destination-bus-width: Width of the source or destination bus in bits.
0023 - adi,source-bus-type,
0024 adi,destination-bus-type: Type of the source or destination bus. Must be one
0025 of the following:
0026 0 (AXI_DMAC_TYPE_AXI_MM): Memory mapped AXI interface
0027 1 (AXI_DMAC_TYPE_AXI_STREAM): Streaming AXI interface
0028 2 (AXI_DMAC_TYPE_AXI_FIFO): FIFO interface
0029
0030 Deprecated optional channel properties:
0031 - adi,length-width: Width of the DMA transfer length register.
0032 - adi,cyclic: Must be set if the channel supports hardware cyclic DMA
0033 transfers.
0034 - adi,2d: Must be set if the channel supports hardware 2D DMA transfers.
0035
0036 DMA clients connected to the AXI-DMAC DMA controller must use the format
0037 described in the dma.txt file using a one-cell specifier. The value of the
0038 specifier refers to the DMA channel index.
0039
0040 Example:
0041
0042 dma: dma@7c420000 {
0043 compatible = "adi,axi-dmac-1.00.a";
0044 reg = <0x7c420000 0x10000>;
0045 interrupts = <0 57 0>;
0046 clocks = <&clkc 16>;
0047 #dma-cells = <1>;
0048
0049 adi,channels {
0050 #size-cells = <0>;
0051 #address-cells = <1>;
0052
0053 dma-channel@0 {
0054 reg = <0>;
0055 adi,source-bus-width = <32>;
0056 adi,source-bus-type = <ADI_AXI_DMAC_TYPE_MM_AXI>;
0057 adi,destination-bus-width = <64>;
0058 adi,destination-bus-type = <ADI_AXI_DMAC_TYPE_FIFO>;
0059 };
0060 };
0061 };
