On Thu, Aug 02, 2018 at 04:10:08PM +0200, Andrea Merello wrote:
> The width of the "length register" cannot be autodetected, and it is now
> specified with a DT property. Add DOC for it.
>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx>
> Signed-off-by: Andrea Merello <andrea.merello@xxxxxxxxx>
> Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx>
> ---
> Changes in v2:
> - change property name
> - property is now optional
> - cc DT maintainer
> Changes in v3:
> - reword
> - cc DT maintainerS and ML
> Changes in v4:
> - specify the unit, the valid range and the default value
> ---
> Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
> index a2b8bfaec43c..aec4a41a03ae 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
> @@ -41,6 +41,10 @@ Optional properties:
> - xlnx,include-sg: Tells configured for Scatter-mode in
> the hardware.
> Optional properties for AXI DMA:
> +- xlnx,sg-length-width: Should be set to the width in bits of the length
> + register as configured in h/w. Takes values {8...26}. If the property
> + is missing or invalid then the default value 23 is used. This is the
> + maximum value that is supported by all IP versions.
If 23 is the max, then why is the range 8-26?
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