power-management/rtc fails on arm

Getting confirmation that /dev/rtc0 is just as good and finding out why there is no symlink (udev rules messed up?). Maybe we can just change it to 'test -e /dev/rtc*'?

My x86 system has these two udev rules;

rules.d/50-udev-default.rules:SUBSYSTEM=="rtc", ATTR{hctosys}=="1", SYMLINK+="rtc"
rules.d/50-udev-default.rules:SUBSYSTEM=="rtc", KERNEL=="rtc0", SYMLINK+="rtc", OPTIONS+="link_priority=-100"
On Calxeda (highbank) there is:

rules.d/50-udev-default.rules:SUBSYSTEM=="rtc", DRIVERS=="rtc_cmos", SYMLINK+="rtc"

Apparently rtc_cmos is not the driver on highbank so this may be a udev bug

We could easily change this to look for /dev/rtc* rather than /dev/rtc but the question is, do we want to?

This is working for me on saucy/exynos. I think the first rule is what is making the link for me. Question is, why isn't this working on highbank? What's the output of 'find /sys | grep hctosys' on highbank?

Looks like this is working on all platforms in saucy, so unless we want to backport the udev fix this bug can be called closed.

Seems like we have to revive this bug - we aren't testing rtc properly so need to do a few updates.

We can use http://manpages.ubuntu.com/manpages/raring/en/man8/hwclock.8.html to do a proper test.

We should also look in /sys/class/rtc to see if the system has one, as this is the authoritative source

This test needs to be refactored to work properly