Re: [PATCH] rtc: cpcap: fix range

From: Tony Lindgren
Date: Mon Jun 29 2020 - 15:20:18 EST


* Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> [200629 11:42]:
> Unbreak CPCAP driver, which has one more bit in the day counter
> increasing the max. range from 2014 to 2058. The original commit
> introducing the range limit was obviously wrong, since the driver
> has only been written in 2017 (3 years after 14 bits would have
> run out).

So I guess with 14 bits vs 15 bits we have these date ranges:

1970 + (0x3fff / 365) = 2014
1970 + (0x7fff / 365) = 2059

Meaning we can't do the whole year for 2059 and it's only 2058
compatible like you say above :)

Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>