Re: [PATCH] rtc: adapt allowed RTC update error
From: Jason Gunthorpe
Date: Thu Dec 03 2020 - 10:53:49 EST
On Thu, Dec 03, 2020 at 03:10:47AM +0100, Alexandre Belloni wrote:
> IIRC, used in conjunction with rtc_hctosys which also adds
> inconditionnaly 500ms this can ends up with the system time
> being one second away from the wall clock time which NTP will take quite
> some time to remove.
I can't remember the details, but this was not the intention.
As long as systohc and hctosys exist then the design goal of rtclib
should be to provide sub-second accuracy on the round trip of time
through the RTC.
Otherwise what is the point?
Jason