RPMSG device interface

modulename: rpmsg_char.ko

configname: CONFIG_RPMSG_CHAR

Linux Kernel Configuration
└─>Device Drivers
└─>Rpmsg drivers
└─>RPMSG device interface
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y here to export rpmsg endpoints as device files, usually found
in /dev. They make it possible for user-space programs to send and
receive rpmsg packets.

source code:
drivers/rpmsg/rpmsg_char.c