On Fri, Jul 24, 2015 at 05:12:57AM -0700, Thomas Kaiser wrote: > > > What puzzles me is that exactly the same kernel (I used Igor Pečovnik's > > > build system) provides working cpufreq support on 5 A20 devices and one > > it > > > fails. > > > > And none of those 5 use CPU voltage scaling. > > > > Maybe I don't understand the whole meaning. But on a Banana Pi a few weeks > ago [1] and on a pcDuino3 Nano I used the last days for USB/UAS benchmarks > the cpufreq stuff was available below /sys/devices/system/cpu/cpu0/cpufreq/ > and altering parameters always had an effect.
Yes, and it had an effect on the frequency, not the voltage. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
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