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Subject[PATCH] RTC/PCF85063: fix reading/setting time/date
Date
The PCF85063 RTC needs special treatment while setting or reading the
time/date:

- while reading the 7 time/date registers they are blocked from updating by
the one second pulse internally. So reading all time/date registers should
happen in one turn to ensure reading is an atomic operation

- to let setting the time/date be an atomic operation as well, the clock
dividers must be kept in reset state to avoid a one second pulse during
writing the 7 time/date registers

Patch 1 and 2 change reading the time/date. I have kept them separately for
easier review. Squasching both into one patch render it more or less
unreadable.
Patch 3 changes setting the time/date.

Comments are welcome
Juergen

Please keep me on CC as I'm not subscribed to the list.



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