M32R SIO I/F

modulename: m32r_sio.ko

configname: CONFIG_SERIAL_M32R_SIO

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>M32R SIO I/F
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say Y here if you want to use the M32R serial controller.

source code: