1What: Attribute for calibrating ST-Ericsson AB8500 Real Time Clock 2Date: Oct 2011 3KernelVersion: 3.0 4Contact: Mark Godfrey <mark.godfrey@stericsson.com> 5Description: The rtc_calibration attribute allows the userspace to 6 calibrate the AB8500.s 32KHz Real Time Clock. 7 Every 60 seconds the AB8500 will correct the RTC's value 8 by adding to it the value of this attribute. 9 The range of the attribute is -127 to +127 in units of 10 30.5 micro-seconds (half-parts-per-million of the 32KHz clock) 11Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration 12 daemon uses this interface. 13