From mboxrd@z Thu Jan 1 00:00:00 1970 From: andrea.merello@gmail.com (Andrea Merello) Date: Fri, 7 Sep 2018 08:24:58 +0200 Subject: [PATCH v5 3/7] dt-bindings: dmaengine: xilinx_dma: add optional xlnx, sg-length-width property In-Reply-To: <20180907062502.8241-1-andrea.merello@gmail.com> References: <20180907062502.8241-1-andrea.merello@gmail.com> Message-ID: <20180907062502.8241-3-andrea.merello@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Cc: Mark Rutland Cc: devicetree at vger.kernel.org Cc: Radhey Shyam Pandey Signed-off-by: Andrea Merello Reviewed-by: Radhey Shyam Pandey --- 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 --- 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..5df4eac7300c 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