On Sun, 2016-03-27 at 23:36:05 +0530, Kedareswara rao Appana wrote:
> This patch updates the device-tree binding doc for
> adding support for AXI DMA.
>
> Signed-off-by: Kedareswara rao Appana <appanad@xxxxxxxxxx>
> ---
> Changes for v2:
> ---> Modified commit message as suggested by Vinod.
> ---> Moved the patch to forward in the series as suggested by vinod.
>
> .../devicetree/bindings/dma/xilinx/xilinx_vdma.txt | 22 +++++++++++++++++++++-
> 1 file changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> index a86737c..5841421 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_vdma.txt
> @@ -3,8 +3,13 @@ It can be configured to have one channel or two channels. If configured
> as two channels, one is to transmit to the video device and another is
> to receive from the video device.
>
> +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-vdma-1.00.a"
> +- compatible: Should be "xlnx,axi-vdma-1.00.a" or "xlnx,axi-dma-1.00.a"
> - #dma-cells: Should be <1>, see "dmas" property below
> - reg: Should contain VDMA registers location and length.
> - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
> @@ -59,6 +64,21 @@ axi_vdma_0: axivdma@40030000 {
> } ;
> } ;
>
> +axi_dma_0: axidma@40400000 {
The node names should follow the generic names, hence
'dma-controller@...'.
> + 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>;
Nit: The spacing around the '<' '>' is inconsistent. I'd just remove all
redundant spaces.
Sören
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