rtc: ds1672: move oscillator handling to .read_time

Return -EINVAL when trying to read an invalid time instead of just probe
because this is a useful information for userspace.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2019-04-07 23:05:35 +02:00
commit 10e3efc165