On Fri, 2005-02-25 at 11:34 +0100, Antonio-M. Corbi Bellot wrote:
> El vie, 25-02-2005 a las 15:22 +1100, Benjamin Herrenschmidt escribió:
>
> Hi BenH!
>
> > Wht do you mean ? The half bogomips ? well, it might just be a matter of
> > enabling support for your machine in arch/ppc/platforms/pmac_cpufreq.c
> > around those lines:
> >
> > if (machine_is_compatible("PowerBook6,5") ||
> > machine_is_compatible("PowerBook6,4") ||
> > machine_is_compatible("PowerBook5,5") ||
> > machine_is_compatible("PowerBook5,4")) {
> > pmac_cpufreq_init_7447A(cpunode);
> >
> > Though that code will probably think you are running at high speed which
> > isn't the case apparently... We probably need to add some code to read
> > back the current speed mode from the processor to get the initial speed
> > correct or all the kernel delay loops will be broken.
>
> That did the trick, decided to give a try to 2.6.11-rc5 and modified
> arch/ppc/platforms/pmac_cpufreq.c to look like this:
>
> /* Check for 7447A based iBook G4 or PowerBook */
> if (machine_is_compatible("PowerBook6,8") || /* My CPU */
> machine_is_compatible("PowerBook6,5") ||
> machine_is_compatible("PowerBook6,4") ||
> machine_is_compatible("PowerBook5,5") ||
> machine_is_compatible("PowerBook5,4")) {
> pmac_cpufreq_init_7447A(cpunode);
>
> Thank's a lot, I can now use full speed (cpufreq works again).
It might incorrectly think it's running at full speed at boot tho, you
may have to force a transition. I'm looking into cleaning that up.
Ben.
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