On 11/20/24 9:37 PM, Samuel Thibault wrote:
Zhaoming Luo, le mer. 20 nov. 2024 20:17:48 +0800, a ecrit:
On 11/9/24 10:58 PM, Sergey Bugaev wrote:
I know that RTC can be configured to either represent local time, or
in UTC. MS Windows prefers the former, GNU/Linux (or rather systemd?)
prefers the latter [6]. Would it maybe make sense for the driver to
have an --option to *pretend* the RTC stores UTC time when it's
actually storing local time, transparently converting the time on
read/write? The driver would learn the local timezone the same way all
processes do (tzset?).
[6]: https://wiki.archlinux.org/title/System_time
I think we don't need to add an option to pretend the RTC stores UTC time
when it's actually storing local time, because I think the Hurd expects RTC
storing UTC time.
Debian GNU/Hurd can support both, it's up to hwclock to compute what
it wants to put in the RTC, and is configured in /etc/adjtime, see man
hwclock.
I read the document, it is indeed not the driver's mission to remember
UTC or local time is used in RTC. The driver just needs to access the
values on RTC and convert them between BCD and binary.
--
Zhaoming Luo
