Re: [PATCH 00/51] rtc: stop using rtc deprecated functions

Russell King - ARM Linux
2017-06-21T09:20:25Z

On Wed, Jun 21, 2017 at 10:39:07AM +0200, Alexandre Belloni wrote:
> On 21/06/2017 at 09:51:52 +0200, Pavel Machek wrote:
> > If someone uses different threshold, well, there will be
> > confusion. But only for users that have their rtc set to the past,
> > which is quite unusual.
> >
>
> Or not, having an RTC set in the past is actually quite common. I'd find
> it weird to have a new device boot and be set to a date in the future.

... and that basically means you can't use hardware that stores RTC
time as a 32-bit number of seconds past 2106.

> Also note that the threshold or offset thing may seem like a good idea
> but fails with many RTCs because of how they handle leap years.

Not for the case being discussed. A 32-bit counter of seconds knows
nothing about leap years - all that is handled by the conversion
functions.

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