Re: [PATCH] rtc: adapt allowed RTC update error

Jason Gunthorpe
2020-12-03T15:53:33Z

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