Real Time Clock on Raspberry Pi with FreeBSD 11

The Raspberry Pi doesn’t have any ‘Real Time Clock’ (RTC) module, which keeps actual time.

To use external RTC module DS1307 on the Raspberry Pi with FreeBSD 10 I wrote a small program.
But FreeBSD 11 has a new driver for DS1307.

Here is instruction how to use it with FreeBSD 11 on the Raspberry Pi.
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