rtc: pcf8523: properly handle oscillator stop bit
The time and date register of the pcf8223 are undefined after a power
reset. Properly handle the OS bit and return -EINVAL when that bit is set.
It is properly removed when setting the time.
This solves an issue where the time and date may be valid for
rtc_valid_tm() but is not the current time.
Signed-off-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com>
parent
2da424af
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