On Jan 2, 2008 2:15 PM, Ingo Molnar <[EMAIL PROTECTED]> wrote: > A stupid question. The old RTC driver is in > drivers/char/rtc.c, and maps to: > > crw-r--r-- 1 root root 10, 135 Oct 25 18:02 /dev/rtc > > the new driver is in drivers/rtc/*, and maps to: > > crw-r--r-- 1 root root 254, 0 Dec 12 02:30 /dev/rtc0 > > but all the x86 distro boxes i have access to make use of /dev/rtc. > There's no symlink set up from /dev/rtc to /dev/rtc0 either. So it > appears to me that the new RTC driver isnt actually utilized on most > distributions. > > shouldnt we provide a Kconfig way of replacing dev 10:135 with the new > driver's 254:0 device? (while keeping all the current modes of operation > as well, of course.) It's all supposed to be 100% ioctl ABI compatible > with the old driver, right?
It's not compatible enough to "fake" only the old major/minor. Userspace must be fixed not to depend on stuff like: /proc/sys/dev/rtc/max-user-freq: http://lkml.org/lkml/2007/8/4/183 > That way distros could start migrating to it > as well, without depending on any udev hackery. It's in the default udev setup: KERNEL=="rtc|rtc0", MODE="0644" KERNEL=="rtc0", SYMLINK+="rtc" Kay -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
