From mboxrd@z Thu Jan  1 00:00:00 1970
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Subject: [v10,1/3] dmaengine: 8250_mtk_dma: add MediaTek uart DMA support
From: Matthias Brugger <matthias.bgg@gmail.com>
Message-Id: <56da4c16-2f47-0033-fe60-ad49ccd0758d@gmail.com>
Date: Thu, 14 Feb 2019 11:08:23 +0100
To: Long Cheng <long.cheng@mediatek.com>, Vinod Koul <vkoul@kernel.org>, Randy Dunlap <rdunlap@infradead.org>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Ryder Lee <ryder.lee@mediatek.com>, Sean Wang <sean.wang@kernel.org>, Nicolas Boichat <drinkcat@chromium.org>
Cc: Dan Williams <dan.j.williams@intel.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Jiri Slaby <jslaby@suse.com>, Sean Wang <sean.wang@mediatek.com>, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, srv_heupstream@mediatek.com, Yingjoe Chen <yingjoe.chen@mediatek.com>, YT Shen <yt.shen@mediatek.com>, Zhenbao Liu <zhenbao.liu@mediatek.com>
List-ID: <dmaengine.vger.kernel.org>
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