On 2021-11-12 11:54, Rob Kossler wrote:
So, there's a DS1139 RTC chip, which is an garden-variety RTC chip
used in designs all over the place. The linux rtc-1307 kernel
driver knows about this chip.
HOWEVER, it requires a battery to maintain time, and near as I can
tell, the only battery in the E310 universe is with the E312 "UPS"
battery. I don't see any evidence
that there's a separate, small, back-up battery for the RTC in
the plain E310.
I wonder how my system comes up Aug 6, 2021? Could this be the date
of the file system image? Perhaps I can modify this.
It was certainly the case in the "days of yore" that the timestamp on
the root filesystem, in lieu of other inputs, was used as the initial
time-of-day clock setting.
Also, look at the "hwclock" utility, if there IS a hardware clock in
your system config, it will allow you to manipulate it.
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