STMicroelectronics STM32 serial port support

modulename: stm32-usart.ko

configname: CONFIG_SERIAL_STM32

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>STMicroelectronics STM32 serial port support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This driver is for the on-chip Serial Controller on
STMicroelectronics STM32 MCUs.
USART supports Rx & Tx functionality.
It support all industry standard baud rates.

If unsure, say N.

source code:

depends
CONFIG_HAS_IOMEM
CONFIG_TTY
CONFIG_ARCH_STM32 or CONFIG_COMPILE_TEST