dmaengine: xilinx_dma: autodetect whether the HW supports scatter-gather

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The AXIDMA and CDMA HW can be either direct-access or scatter-gather
version. These are SW incompatible.

The driver can handle both versions: a DT property was used to
tell the driver whether to assume the HW is in scatter-gather mode.

This patch makes the driver to autodetect this information. The DT
property is not required anymore.

No changes for VDMA.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Cc: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

...

This commit is contained in:

Andrea Merello 2018-11-20 16:31:49 +01:00 • committed by Vinod Koul

parent ae809690b4

commit 05f7ea7f6e

1 changed files with 10 additions and 4 deletions

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drivers/dma/xilinx/xilinx_dma.c

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