On Thursday 23 July 2009 15:06:16 Rupjyoti Sarmah wrote:
> Hi Thomas & Dominik,
>
> Thanks a lot for your suggestions.
>
> I followed the steps ( also looked into the cpu-freq documentation
> inside the linux kernel tree) & included the flags related to the CPU
> frequency.
>
> After booting the kernel however I am not able to see the cpufreq
> folder inside /sys folder as you mentioned.
> I was expecting to see /cpufreq/scaling_setspeed, but the cpufreq
> folder is not present itself.
>
> I included all the frequency scaling options in the menuconfig option
> of the kernel. I rebulit the kernel and downloaded to the powerpc
> target. However the folder I mentioned is missing, I got a roadblock.
>
> I would be grateful if you have any recommendation for me, I would be
> able to move ahead from there.
One of the drivers Dominik showed you must load/work successfully and
you should get the folder.
Maybe now it's time to do some HW research and clarify:
- whether your machine can do freq scaling at all
- If yes, which one of the drivers would be the right one for your HW
- If there is one, does it work as expected on your HW
Thomas
>
> Regards
> Rup
>
>
>
>
> On Wed, Jul 22, 2009 at 5:51 PM, Dominik
> Brodowski<linux@xxxxxxxxxxxxxxxxxxxx> wrote:
> > Hi,
> >
> > On Wed, Jul 22, 2009 at 05:25:29PM +0530, Rupjyoti Sarmah wrote:
> >> Thanks for your suggestions. I quickly tested the following
> >>
> >> grep -r cpufreq_register_driver arch/.../
> >>
> >> It did not find the driver in the architecture I am targeting ( ppc
).
> >> However drivers were found for other architectures.
> >> Am I missing soomething ?
> >
> > # grep -Rli cpufreq_register_d arch/powerpc/
> > arch/powerpc/platforms/cell/cbe_cpufreq.c
> > arch/powerpc/platforms/pasemi/cpufreq.c
> > arch/powerpc/platforms/powermac/cpufreq_32.c
> > arch/powerpc/platforms/powermac/cpufreq_64.c
> >
> > Best,
> > Dominik
> >
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