18c2ecf20Sopenharmony_ciWhat:           /sys/class/rtc/rtc0/device/rtc_calibration
28c2ecf20Sopenharmony_ciDate:           Oct 2011
38c2ecf20Sopenharmony_ciKernelVersion:  3.0
48c2ecf20Sopenharmony_ciContact:        Mark Godfrey <mark.godfrey@stericsson.com>
58c2ecf20Sopenharmony_ciDescription:    Attribute for calibrating ST-Ericsson AB8500 Real Time Clock
68c2ecf20Sopenharmony_ci		The rtc_calibration attribute allows the userspace to
78c2ecf20Sopenharmony_ci                calibrate the AB8500.s 32KHz Real Time Clock.
88c2ecf20Sopenharmony_ci                Every 60 seconds the AB8500 will correct the RTC's value
98c2ecf20Sopenharmony_ci                by adding to it the value of this attribute.
108c2ecf20Sopenharmony_ci
118c2ecf20Sopenharmony_ci                The range of the attribute is -127 to +127 in units of
128c2ecf20Sopenharmony_ci                30.5 micro-seconds (half-parts-per-million of the 32KHz clock)
138c2ecf20Sopenharmony_ciUsers:          The /vendor/st-ericsson/base_utilities/core/rtc_calibration
148c2ecf20Sopenharmony_ci                daemon uses this interface.
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