RMI4 Function 30 (GPIO LED)

configname: CONFIG_RMI4_F30

Linux Kernel Configuration
└─>Device Drivers
└─>Input device support
└─>RMI4 Function 30 (GPIO LED)
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y here if you want to add support for RMI4 function 30.

Function 30 provides GPIO and LED support for RMI4 devices. This
includes support for buttons on TouchPads and ClickPads.