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dda367ac MG |
1 | What: Attribute for calibrating ST-Ericsson AB8500 Real Time Clock |
2 | Date: Oct 2011 | |
3 | KernelVersion: 3.0 | |
4 | Contact: Mark Godfrey <mark.godfrey@stericsson.com> | |
5 | Description: 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) | |
11 | Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration | |
12 | daemon uses this interface. |