RTC UIE emulation on dev interface


Linux Kernel Configuration
└─>Device Drivers
└─>Real Time Clock
└─>RTC UIE emulation on dev interface
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Provides an emulation for RTC_UIE if the underlying rtc chip
driver does not expose RTC_UIE ioctls. Those requests generate
once-per-second update interrupts, used for synchronization.

The emulation code will read the time from the hardware
clock several times per second, please enable this option
only if you know that you really need it.