Orange Pi PC 2 (Allwinner H5) cpu governor support?

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Hey there,

I recently got an Orange Pi PC 2 and Fedora 29 is working quite well on it. The only issue I'm having is occasional RCU stalls and I've read some reports that reducing the maximum CPU frequency can improve this a bit on these boards.

However, I can't find any cpufreq-related tunables for any of the CPUs:

  # ls -al /sys/devices/system/cpu/cpufreq/
  total 0
  drwxr-xr-x.  2 root root 0 Jan  5 15:42 .
  drwxr-xr-x. 10 root root 0 Jun 22  2018 ..

It looks like everything related to SUNXI or CPUFREQ in the kernel config is either a module or built into the kernel. I've found some other threads talking about ensuring the right CONFIG_REGULATOR_* options are enabled, but I'm not sure what the correct one might be for this board.

Am I missing something important here to regulate the CPU frequency? Thanks!

--
Major Hayden
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