HSI support

modulename: hsi.ko

configname: CONFIG_HSI

Linux Kernel Configuration
└─>Device Drivers
└─>HSI support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
The "High speed synchronous Serial Interface" is
synchronous serial interface used mainly to connect
application engines and cellular modems.

source code:
drivers/hsi/