linux-kernel - [PATCH -next 0/6] dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support

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Date:   Tue, 22 Oct 2019 22:30:16 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     vkoul@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        dan.j.williams@...el.com, michal.simek@...inx.com,
        anirudha.sarangi@...inx.com, nick.graumann@...il.com,
        andrea.merello@...il.com, appana.durga.rao@...inx.com,
        mcgrof@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Subject: [PATCH -next 0/6] dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support

This patchset adds Xilinx AXI MCDMA IP support. The AXI MCDMA provides
high-bandwidth direct memory access between memory and AXI4-Stream target
peripherals. It supports up to 16 independent read/write channels.

MCDMA IP supports per channel interrupt output but driver support one
interrupt per channel for simplification. IP specification/programming
sequence and register description is mentioned in PG [1].

The driver is tested with xilinx internal dmatest client. In end usecase
MCDMA will be used by xilinx axiethernet driver using dma API's.

Changes since RFC[2]:
- Remove xilinx axidma multichannel support.
- Addressed all RFC comments except modularizing initialization of channel
  segment is skipped as it would create tight coupling b/w axidma and
  mcdma internal structures.
- Include MCDMA IP description in Kconfig.
- Few regression fixes from xilinx tree.

NOTE: This patchset is based on next and previous[3] axidma series.

[1] https://www.xilinx.com/support/documentation/ip_documentation/axi_mcdma/v1_0/pg288-axi-mcdma.pdf
[2] https://spinics.net/lists/devicetree/msg242427.html
[3] https://www.spinics.net/lists/dmaengine/msg19910.html

Radhey Shyam Pandey (6):
  dt-bindings: dmaengine: xilinx_dma: Remove axidma multichannel support
  dt-bindings: dmaengine: xilinx_dma: Fix formatting and style
  dt-bindings: dmaengine: xilinx_dma: Add binding for Xilinx MCDMA IP
  dmaengine: xilinx_dma: Remove axidma multichannel mode support
  dmaengine: xilinx_dma: Extend dma_config struct to store irq routine
    handle
  dmaengine: xilinx_dma: Add Xilinx AXI MCDMA Engine driver support

 .../devicetree/bindings/dma/xilinx/xilinx_dma.txt  |  24 +-
 drivers/dma/Kconfig                                |   4 +
 drivers/dma/xilinx/xilinx_dma.c                    | 517 ++++++++++++++++-----
 3 files changed, 431 insertions(+), 114 deletions(-)

-- 
2.7.4