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Documentation: DT: dma: Delete binding doc for AXI DMA 

The AXI DMA support is added to the existing AXI VDMA
driver. Device tree binding information also updated
in the VDMA binding doc.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Kedareswara rao Appana 2016-06-24 10:51:24 +05:30 committed by Vinod Koul
parent 1a9e7a03c7
commit 5cd0749af2
1 changed files with 0 additions and 65 deletions
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65
Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
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Xilinx AXI DMA engine, it does transfers between memory and AXI4 stream
target devices. It can be configured to have one channel or two channels.
If configured as two channels, one is to transmit to the device and another
is to receive from the device.
Required properties:
- compatible: Should be "xlnx,axi-dma-1.00.a"
- #dma-cells: Should be <1>, see "dmas" property below
- reg: Should contain DMA registers location and length.
- dma-channel child node: Should have at least one channel and can have up to
two channels per device. This node specifies the properties of each
DMA channel (see child node properties below).
Optional properties:
- xlnx,include-sg: Tells whether configured for Scatter-mode in
the hardware.
Required child node properties:
- compatible: It should be either "xlnx,axi-dma-mm2s-channel" or
"xlnx,axi-dma-s2mm-channel".
- interrupts: Should contain per channel DMA interrupts.
- xlnx,datawidth: Should contain the stream data width, take values
{32,64...1024}.
Option child node properties:
- xlnx,include-dre: Tells whether hardware is configured for Data
Realignment Engine.
Example:
++++++++
axi_dma_0: axidma@40400000 {
compatible = "xlnx,axi-dma-1.00.a";
#dma_cells = <1>;
reg = < 0x40400000 0x10000 >;
dma-channel@40400000 {
compatible = "xlnx,axi-dma-mm2s-channel";
interrupts = < 0 59 4 >;
xlnx,datawidth = <0x40>;
} ;
dma-channel@40400030 {
compatible = "xlnx,axi-dma-s2mm-channel";
interrupts = < 0 58 4 >;
xlnx,datawidth = <0x40>;
} ;
} ;
* DMA client
Required properties:
- dmas: a list of <[DMA device phandle] [Channel ID]> pairs,
where Channel ID is '0' for write/tx and '1' for read/rx
channel.
- dma-names: a list of DMA channel names, one per "dmas" entry
Example:
++++++++
dmatest_0: dmatest@0 {
compatible ="xlnx,axi-dma-test-1.00.a";
dmas = <&axi_dma_0 0
&axi_dma_0 1>;
dma-names = "dma0", "dma1";
} ;