Just updated the Cubox-i4Pro to 3.19-rc1, after disabling the kernel options for ‘power management’, as the current patch does not compile cleanly..

Fedora release 21 (Twenty One)
Kernel 3.19.0-rc1 on an armv7l (ttymxc0)
...........
[root@rgcubox ~]# uname -a
Linux rgcubox 3.19.0-rc1 #1 SMP PREEMPT Mon Dec 22 15:22:15 EST 2014 armv7l armv7l armv7l GNU/Linux

Details of Kernel 3.19-rc1 are here:  http://lkml.iu.edu/hypermail/linux/kernel/1412.2/02480.html

The (patched) code is available here: https://github.com/jmontleon/fedora-20-cubox-i_hb/tree/3.19-rc1

As limited support seems to be in the mainline kernel.org code, now, I will try that soon..

Robert Gadsdon.   December 21, 2014.