[lkml]   [2018]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH v4 3/7] dt-bindings: dmaengine: xilinx_dma: add optional xlnx,sg-length-width property
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 <>
Cc: Mark Rutland <>
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
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.
 \ /
  Last update: 2018-08-02 16:11    [W:0.154 / U:6.568 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site