[resend PATCH v4 0/2] add uart DMA function

From: Long Cheng
Date: Mon Dec 10 2018 - 01:41:29 EST

In Mediatek SOCs, the uart can support DMA function.
Base on DMA engine formwork, we add the DMA code to support uart. And put the code under drivers/dma.

This series contains document bindings, Kconfig to control the function enable or not,
device tree including interrupt and dma device node, the code of UART DM

Changes compared to v3:
-fix CONFIG_PM, will cause build fail
Changes compared to v2:
-remove unimportant parameters
-instead of cookie, use APIs of virtual channel.
-use of_dma_xlate_by_chan_id.
Changes compared to v1:
-mian revised file, 8250_mtk_dma.c
--parameters renamed for standard
--remove atomic operation

Long Cheng (2):
dmaengine: 8250_mtk_dma: add Mediatek uart DMA support
arm: dts: mt2712: add uart APDMA to device tree

arch/arm64/boot/dts/mediatek/mt2712e.dtsi | 50 ++
drivers/dma/mediatek/8250_mtk_dma.c | 830 +++++++++++++++++++++++++++++
drivers/dma/mediatek/Kconfig | 11 +
drivers/dma/mediatek/Makefile | 1 +
4 files changed, 892 insertions(+)
create mode 100644 drivers/dma/mediatek/8250_mtk_dma.c