Re: [linux-pm] OpPoint summary

[Matthew Locke <matt@nomadgs.com>]

On Sep 18, 2006, at 7:33 AM, Richard A. Griffiths wrote:

> On Sun, 2006-09-17 at 19:48 +0200, Pavel Machek wrote:
> > Hi!
> >
> > > > Care to resend your patches in the proper format, through email so 
> > > > that
> > > > we can see them, and possibly get some testing in -mm if they look 
> > > > sane?
> > >
> > > Greg,
> > >   here's the patch that implements operating points for different
> > >   frequencies
> > > for the speedstep-centrino line of processors.  Operating points are 
> > > created
> > > in much the same manner that cpufreq tables are.  This works for both
> > > simple implementations like the centrino and more complex SoC systems
> > > like the arm-pxa72x which has several clocks to control, and 
> > > different clock
> > > divisors and multipliers.
> >
> > > +static struct oppoint lowest = {
> > > +       .name = "lowest",
> > > +       .type = PM_FREQ_CHANGE,
> > > +       .frequency = 0,
> > > +       .voltage = 0,
> > > +       .latency = 15,
> > > +       .prepare_transition  = cpufreq_prepare_transition,
> > > +       .transition = centrino_transition,
> > > +       .finish_transition = cpufreq_finish_transition,
> > > +};
> >
> > We had nice, descriptive interface... with numbers. Now you want to
> > introduce english state names... looks like a step back to me.
>
> Maybe a compromise could be reached where a defined set of numbers maps
> to  string names ala Unix init states. Many people (at least me) still
> invoke init 6 to reboot a system.  A defined table would satisfy both
> the number and string camps.

PowerOP allows the platform to define the name. In our cpufreq 
integration patches, we reuse the same name that cpufreq centrino used.

> Richard
> _______________________________________________
> linux-pm mailing list
> linux-pm@lists.osdl.org
> https://lists.osdl.org/mailman/listinfo/linux-pm

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