Jussi Kivilinna e3b3e57e56 RTC: add interface for check if RTC time has been set
New interface allows checking if RTC time has been set.  This allows to application to detect if RTC has valid time (after
reset) or should application attempt to get real time by other means (for example, by launching ntpclient or GPS).
2017-04-06 09:53:11 -06:00
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2015-11-20 09:55:18 -06:00
2016-11-18 15:26:08 +01:00