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Date: Mon, 27 Aug 2018 11:01:03 +0530 From: Vinod <vkoul@...nel.org> To: Andrea Merello <andrea.merello@...il.com> Cc: dan.j.williams@...el.com, michal.simek@...inx.com, appana.durga.rao@...inx.com, dmaengine@...r.kernel.org, v4-000linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, robh+dt@...nel.org, mark.rutland@....com, devicetree@...r.kernel.org, radhey.shyam.pandey@...inx.com Subject: Re: [PATCH v4 3/7] dt-bindings: dmaengine: xilinx_dma: add optional xlnx,sg-length-width property On 02-08-18, 16:10, 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. Add Documentation for it... > > Cc: Rob Herring <robh+dt@...nel.org> > Cc: Mark Rutland <mark.rutland@....com> > Cc: devicetree@...r.kernel.org > Cc: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com> > Signed-off-by: Andrea Merello <andrea.merello@...il.com> > Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com> > --- > 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. > - xlnx,mcdma: Tells whether configured for multi-channel mode in the hardware. > Optional properties for VDMA: > - xlnx,flush-fsync: Tells which channel to Flush on Frame sync. > -- > 2.17.1 -- ~Vinod
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