PXA serial port support

modulename: 8250_pxa.ko

configname: CONFIG_SERIAL_8250_PXA

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>PXA serial port support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
If you have a machine based on an Intel XScale PXA2xx CPU you can
enable its onboard serial ports by enabling this option. The option is
applicable to both devicetree and legacy boards, and early console is
part of its support.

source code: