1What:           /sys/class/rtc/rtc0/device/rtc_calibration
2Date:           Oct 2011
3KernelVersion:  3.0
4Contact:        Mark Godfrey <mark.godfrey@stericsson.com>
5Description:    Attribute for calibrating ST-Ericsson AB8500 Real Time Clock
6		The rtc_calibration attribute allows the userspace to
7                calibrate the AB8500.s 32KHz Real Time Clock.
8                Every 60 seconds the AB8500 will correct the RTC's value
9                by adding to it the value of this attribute.
10
11                The range of the attribute is -127 to +127 in units of
12                30.5 micro-seconds (half-parts-per-million of the 32KHz clock)
13Users:          The /vendor/st-ericsson/base_utilities/core/rtc_calibration
14                daemon uses this interface.
15