linux-kernel - [PATCH v4] add support for Mediatek Command-Queue DMA controller on MT6765 SoC

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Date:   Thu, 27 Dec 2018 21:10:56 +0800
From:   <shun-chih.yu@...iatek.com>
To:     Sean Wang <sean.wang@...iatek.com>, Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Dan Williams <dan.j.williams@...el.com>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <srv_wsdupstream@...iatek.com>
Subject: [PATCH v4] add support for Mediatek Command-Queue DMA controller on MT6765 SoC

Changes since v3:
- simplify the ISR and management on descriptors by removing tasklet and ASYNC_TX_ENABLE_CHANNEL_SWITCH
- remove useless field in mtk_cqdma_vdesc structure
- change dev_info to dev_dbg
- fix typos

Changes since v2:
- fix build warning for kernel with DMA address in 32-bit

Changes since v1:
- remove unused macros, typos
- leverage ASYNC_TX_ENABLE_CHANNEL_SWITCH to maintain DMA descriptor list


Shun-Chih Yu (2):
  dt-bindings: dmaengine: Add MediaTek Command-Queue DMA controller
    bindings
  dmaengine: mediatek: Add MediaTek Command-Queue DMA controller for
    MT6765 SoC

 .../devicetree/bindings/dma/mtk-cqdma.txt     |  31 +
 drivers/dma/mediatek/Kconfig                  |  12 +
 drivers/dma/mediatek/Makefile                 |   1 +
 drivers/dma/mediatek/mtk-cqdma.c              | 867 ++++++++++++++++++
 4 files changed, 911 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/mtk-cqdma.txt
 create mode 100644 drivers/dma/mediatek/mtk-cqdma.c