linux-kernel - [RFC v2 PATCH 1/7] dt-bindings: dmaengine: xilinx_dma: Add xlnx,axistream-connected property

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Date:   Fri, 9 Apr 2021 23:25:59 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     <vkoul@...nel.org>, <robh+dt@...nel.org>, <michal.simek@...inx.com>
CC:     <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <git@...inx.com>,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Subject: [RFC v2 PATCH 1/7] dt-bindings: dmaengine: xilinx_dma: Add xlnx,axistream-connected property

Add an optional DMA property 'xlnx,axistream-connected'. This can be
specified to indicate that DMA is connected to a streaming IP in the
hardware design and dma driver needs to do some additional handling
i.e pass metadata and perform streaming IP specific configuration.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
---
Changes for v2:
- Rename xlnx,axieth-connected to xlnx,axistream-connected to
  make it generic.
---
 Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
index 325aca52cd43..f5f23a4a4467 100644
--- a/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
+++ b/Documentation/devicetree/bindings/dma/xilinx/xilinx_dma.txt
@@ -49,6 +49,8 @@ Optional properties for AXI DMA and MCDMA:
 	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,axistream-connected: Tells whether DMA is connected to AXI stream IP.
+
 Optional properties for VDMA:
 - xlnx,flush-fsync: Tells which channel to Flush on Frame sync.
 	It takes following values:
-- 
2.7.4