Hi,
Timo wrote:
>
> I think what Maxime was trying to say is, that while all of your boards
> support Cpufreq, only the Cubietruck supports voltage scaling because only
> Cubietruck has the power regulator nodes defined in it's dts file (just
> have a look at the last lines of the Cubitruck dts file and compare that to
> the dts file, let's say, for Bananapi). On the other boards, the frequency
> is scaled, but the voltage always stays at 1.4V as set in U-Boot (that
> means the voltages in the cpufreq operating points are not used on these
> boards). At least that's what I understand after a recent email axchange
> with Chen-Yu Tsai.
Ah, now I think I understand. You're talking about these lines here?
https://github.com/RobertCNelson/u-boot/blob/master/arch/arm/dts/sun7i-a20-cubietruck.dts#L244-L269
So while using CONFIG_REGULATOR_AXP20X=y will bring working cpufreq support
to the cubietruck, shouldn't adding these lines to the device trees of the
other 5 A20 devices enable CPU voltage scaling there?
