MediaTek SoCs APDMA support for UART

modulename: mtk-uart-apdma.ko

configname: CONFIG_MTK_UART_APDMA

Linux Kernel Configuration
└─>Device Drivers
└─>DMA Engine support
└─>Device Tree and Open Firmware support
└─>MediaTek SoCs APDMA support for UART
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Support for the UART DMA engine found on MediaTek MTK SoCs.
When SERIAL_8250_MT6577 is enabled, and if you want to use DMA,
you can enable the config. The DMA engine can only be used
with MediaTek SoCs.

source code: