On Sat, 2012-01-28 at 21:08 -0600, kevin diggs wrote: > Hi, > > What will give me access to the RTC hardware on an old PowerMac 8600? > I modload rtc-generic. /proc/devices has:
should work with rtc generic, not sure what's up. You can check with printk ... rtc_generic should call into get_rtc_time which should go via ppc_md. into some powermac specific variants, themselves calling into the cuda driver. Cheers, Ben. > 254 rtc > > and ls -l /dev/rtc*: > > crw-r--r-- 2 root root 254, 0 Sep 2 2010 /dev/rtc > crw-r--r-- 2 root root 254, 0 Sep 2 2010 /dev/rtc0 > crw-r--r-- 1 root root 10, 135 Aug 10 2004 /dev/rtc.old > > Trying to run hwclock gives: > > [root@PowerMac8600B root]# hwclock --debug > hwclock from util-linux-2.12pre > Using /dev/rtc interface to clock. > Last drift adjustment done at 1317444443 seconds after 1969 > Last calibration done at 1317444443 seconds after 1969 > Hardware clock is on local time > Assuming hardware clock is kept in local time. > Waiting for clock tick... > /dev/rtc does not have interrupt functions. Waiting in loop for time > from /dev/rtc to change > RTC_RD_TIME: Invalid argument > ioctl() to /dev/rtc to read the time failed. > > I could have sworn this used to work on this system??? > > What am I forgetting? > > gzip -dc /proc/config.gz|grep -i rtc lists: > > CONFIG_RTC_LIB=m > CONFIG_RTC_CLASS=m > # RTC interfaces > CONFIG_RTC_INTF_SYSFS=y > CONFIG_RTC_INTF_PROC=y > CONFIG_RTC_INTF_DEV=y > # Platform RTC drivers > CONFIG_RTC_DRV_CMOS=m > # on-CPU RTC drivers > CONFIG_RTC_DRV_GENERIC=m > > Thanks! > > kevin > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
