linux-kernel - Re: OpPoint summary

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Date:	Thu, 14 Sep 2006 11:17:40 -0700
From:	"David Singleton" <daviado@...il.com>
To:	"Auke Kok" <auke-jan.h.kok@...el.com>
Cc:	"Greg KH" <greg@...ah.com>, linux-pm@...ts.osdl.org,
	"kernel list" <linux-kernel@...r.kernel.org>
Subject: Re: OpPoint summary

On 9/14/06, Auke Kok <auke-jan.h.kok@...el.com> wrote:
> David Singleton wrote:
>
> > +static const struct cpu_id cpu_ids[] = {
> > +       [CPU_BANIAS]    = { 6,  9, 5 },
> > +       [CPU_DOTHAN_A1] = { 6, 13, 1 },
> > +       [CPU_DOTHAN_A2] = { 6, 13, 2 },
> > +       [CPU_DOTHAN_B0] = { 6, 13, 6 },
> > +       [CPU_MP4HT_D0]  = {15,  3, 4 },
> > +       [CPU_MP4HT_E0]  = {15,  4, 1 },
> > +};
>
>
> Any reason why { 6, 13, 8 } is missing? My lenovo T43 identifies itself as such:
>
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 13
> model name      : Intel(R) Pentium(R) M processor 1.86GHz
> stepping        : 8
>
> I'm not sure a Dothan B1 exists, but some postings suggest even C0 and C1 are
> valid steppings. I'm sure OpPoint could work with those as well.

Yes it could.  The centrino was the first platform I tested on and I used the
existing speedstep-centrino code from cpufreq.  The 1.86Ghz  was not in
the cpufreq base.    But you can see how easy it is to add new operating points
for a new cpu.

Adding new platform support is quite straight forward.  It basically requires
a function to transition to the new operating point and the parameters needed
for the transition.

David
>
> Auke
>
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