linux-kernel - [PATCH v3 2/5] dt-bindings: dmaengine: xilinx_dma: add optional xlnx,sg-length-width property

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Date:   Mon, 25 Jun 2018 11:27:21 +0200
From:   Andrea Merello <andrea.merello@...il.com>
To:     vkoul@...nel.org, dan.j.williams@...el.com,
        michal.simek@...inx.com, appana.durga.rao@...inx.com,
        dmaengine@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Andrea Merello <andrea.merello@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Subject: [PATCH v3 2/5] 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 <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
---
 Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
index a2b8bfaec43c..c894abe28baa 100644
--- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
+++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
@@ -41,6 +41,7 @@ Optional properties:
 - xlnx,include-sg: Tells configured for Scatter-mode in
 	the hardware.
 Optional properties for AXI DMA:
+- xlnx,sg-length-width: Should be the width of the length register as configured in h/w.
 - 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