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