Maximum number of RocketPort EXPRESS/INFINITY ports

configname: CONFIG_SERIAL_RP2_NR_UARTS

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>Maximum number of RocketPort EXPRESS/INFINITY ports
In linux kernel since version 3.1 (release Date: 2011-10-24)  
If multiple cards are present, the default limit of 32 ports may
need to be increased.