Message ID | 20181120153151.18024-3-andrea.merello@gmail.com (mailing list archive) |
---|---|
State | Accepted |
Headers | show |
Series | [v6,1/7] dmaengine: xilinx_dma: commonize DMA copy size calculation | expand |
On Tue, Nov 20, 2018 at 04:31:47PM +0100, Andrea Merello wrote: > The width of the "length register" cannot be autodetected, and it is now > specified with a DT property. Add documentation for it. > > Cc: Rob Herring <robh+dt@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: devicetree@vger.kernel.org > Cc: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com> > Signed-off-by: Andrea Merello <andrea.merello@gmail.com> > Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.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 > Changes in v5: > - commit message trivial fix > - fix spaces before tab > Changes in v6: > None > --- > Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 4 ++++ > 1 file changed, 4 insertions(+) Please add acks/reviewed-bys when posting new versions.
diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt index 174af2c45e77..2fce9fb4b270 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.