On Wed, Nov 13, 2024 at 12:30:32PM +0100, Wolfram Sang wrote:
> tm_mon describes months from 0 to 11, but the register contains BCD from
> 1 to 12. tm_year contains years since 1900, but the BCD contains 20XX.
> Apply the offsets when converting these numbers.
>
> Fixes: deeb4b5393e1 ("rtc: rzn1: Add new RTC driver")
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Forgot to add that Biju Das had a nice test case for the months:
Steps to reproduce:
------------------
date -s "2016-12-31 23:59:55";hwclock -w
hwclock; sleep 10; hwclock
Original result:
---------------
Sat Dec 31 23:59:55 UTC 2016
Sat Dec 31 23:59:55 2016 0.000000 seconds
hwclock: RTC_RD_TIME: Invalid argument
Result after the fix:
--------------------
Sat Dec 31 23:59:55 2016 0.000000 seconds
Sun Jan 1 00:00:05 2017 0.000000 seconds
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