On Wed, Nov 23, 2011 at 04:04, Martin Langhoff <martin.langh...@gmail.com> wrote: > On Nov 22, 2011 5:58 PM, "Kay Sievers" <kay.siev...@vrfy.org> wrote: >> >> On Tue, Nov 22, 2011 at 23:42, Martin Langhoff >> <martin.langh...@gmail.com> wrote: >> > On Tue, Nov 22, 2011 at 3:21 PM, Kay Sievers <kay.siev...@vrfy.org> >> > wrote: >> >> Yeah, that's intentional. Udev on other platforms can't know which rtc >> >> should be the preferred one. >> > >> > Well, now you can: if it says hctosys == 1, it means that the kernel >> > config told it to pick that one, and that it's sync'd the system time >> > to it. >> >> You have rtc1 set in the kernel config for your box? > > Correct. And rtc0 is only good for rtcwake -- won't hold "real" clock time, > because it isn't battery-backed. > > "My box" is the XO-1.75 platform, of which we expect a few million will be > produced starting soon. > > Future kernels may bring them up in different order, but that's a different > pile of pain. > >> >> This link is mainly for backwards compat, because in earlier days it >> >> was a real kernel device. >> > >> > Well, the symlink has a very practical use! If you have several RTCs, >> > you can use udev to symlink rtc to it, and it gets htclock to DTRT. >> > >> > On our XO-1.75, the "real" rtc is rtc1. >> > >> > Next, we got to get src/utils.c to prefer "rtc" if it finds it ;-) >> >> I guess udev should claim /dev/rtc for the rtc device that has hctosys == >> 1 set? > > Yep. It's a trivial udev rule, perhaps belongs to Fedora's initscripts?
Nah, 'initscripts' needs a radical diet, not more random stuff in it. :) Todo lists are there to remember things. Seems that worked well in this case. :) Here is the systemd fix: http://cgit.freedesktop.org/systemd/systemd/commit/?id=51122dc9e36cdafe76a07d1ddf1a3a7e4726bb7b and the udev fix: http://git.kernel.org/?p=linux/hotplug/udev.git;a=commitdiff;h=6102188c93e55eba1b5dad54d27ea1ac2e8c7e73 Both use the 'system rtc' now. Kay _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
