WIP: cpufreq: armada-37xx: fix stability issues for 1 GHz systems
THIS IS WORK IN PROGRESS!
We've discovered stability issues on systems with base frequency 1 GHz
that cause the CPU to behave weirdly when frequency changes to 1 GHz.
A similar erratum is documented by Marvell but only for systems where
base frequency is 1.2 GHz.
We've discovered that to make cpufreq scaling stable on Armada 3720
on systems with base frequency 1 GHz, we also have to set voltage levels
for L1, L2 and L3 loads to 1108 mV. (We were led to this by patch we
found at https://forum.armbian.com/topic/10429-how-to-make-espressobin-v7-stable/page/2/?tab=comments#comment-80012).
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Pali Rohár <pali@kernel.org>
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