Maximum number of LiteUART ports

configname: CONFIG_SERIAL_LITEUART_MAX_PORTS

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Maximum number of LiteUART ports
In linux kernel since version 5.2 (release Date: 2019-07-07)  
Set this to the maximum number of serial ports you want the driver
to support.