Aspeed Virtual UART

modulename: 8250_aspeed_vuart.ko

configname: CONFIG_SERIAL_8250_ASPEED_VUART

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Device Tree and Open Firmware support
└─>Aspeed Virtual UART
In linux kernel since version 4.2 (release Date: 2015-08-30)  
If you want to use the virtual UART (VUART) device on Aspeed
BMC platforms, enable this option. This enables the 16550A-
compatible device on the local LPC bus, giving a UART device
with no physical RS232 connections.

source code:
drivers/tty/serial/8250/8250_aspeed_vuart.c
selects
CONFIG_REGMAP