[PATCH 5/5] Documentation: document xilinx_dma "xlnx,lengthregwidth" DT property

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Signed-off-by: Andrea Merello <andrea.merello@xxxxxxxxx>
---
 Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
index 2897e6d..71d31f9 100644
--- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
+++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
@@ -34,6 +34,9 @@ Required properties:
 	Optional elements: "m_axi_mm2s_aclk", "m_axi_s2mm_aclk",
 			   "m_axi_sg_aclk"
 
+Required properties for AXI DMA:
+- xlnx,lengthregwidth: Should be the width of the length register as configured in h/w.
+
 Required properties for VDMA:
 - xlnx,num-fstores: Should be the number of framebuffers as configured in h/w.
 
-- 
2.7.4

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