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1What: /sys/class/rtc/rtc0/device/rtc_calibration2Date: Oct 20113KernelVersion: 3.04Contact: Mark Godfrey <mark.godfrey@stericsson.com>5Description: Attribute for calibrating ST-Ericsson AB8500 Real Time Clock6 The rtc_calibration attribute allows the userspace to7 calibrate the AB8500.s 32KHz Real Time Clock.8 Every 60 seconds the AB8500 will correct the RTC's value9 by adding to it the value of this attribute.10 11 The range of the attribute is -127 to +127 in units of12 30.5 micro-seconds (half-parts-per-million of the 32KHz clock)13Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration14 daemon uses this interface.15