Minimal PowerOP support for Intel Enhanced Speedstep "Centrino"
notebooks. These systems run at an operating point comprised of a cpu
frequency and a core voltage. The voltage could be set from the values
recommended in the datasheets if left unspecified (-1) in the operating
point, as cpufreq do
* Todd Poynor <[EMAIL PROTECTED]> wrote:
> +static int
> +powerop_centrino_get_point(struct powerop_point *point)
> +{
> + unsigned l, h;
> + unsigned cpu_freq;
> +
> + rdmsr(MSR_IA32_PERF_STATUS, l, h);
> + if (unlikely((cpu_freq = ((l >> 8) & 0xff) * 100) == 0)) {
> +
Hi!
> Minimal PowerOP support for Intel Enhanced Speedstep "Centrino"
> notebooks. These systems run at an operating point comprised of a cpu
> frequency and a core voltage. The voltage could be set from the values
> recommended in the datasheets if left unspecified (-1) in the operating
> point
On Wed, Aug 10, 2005 at 12:01:33PM +0200, Pavel Machek wrote:
> Hi!
>
> > Minimal PowerOP support for Intel Enhanced Speedstep "Centrino"
> > notebooks. These systems run at an operating point comprised of a cpu
> > frequency and a core voltage. The voltage could be set from the values
> > recom
Bruno Ducrot wrote:
> ATM I'm wondering what are the pro for those patches wrt current cpufreq
infrastructure (especially cpufreq's notion of notifiers).
I still don't find a good one but I'm surely missing something obvious.
This is lower layer than cpufreq, intended for use by cpufreq (and
> I've attempted to extoll the benefits of adding these interfaces in
> previous emails, and if after that it still seems mystifying why anybody
> would want to do this then I'll take the heat for doing a lousy job of
> extolling. I've also admitted that it is primarily of use in
> embedded-sp
Jordan Crouse wrote:
When it comes
to embedded power management concepts, a consistant theme is that people
often question the usefulness, redundancy or complexity of a solution. This
is perfectly understandable, since such a huge majority of the power
management experts and users are concentra
On Wed, Aug 10, 2005 at 02:58:48PM +0200, Bruno Ducrot wrote:
> > > Minimal PowerOP support for Intel Enhanced Speedstep "Centrino"
> > > notebooks. These systems run at an operating point comprised of a cpu
> > > frequency and a core voltage. The voltage could be set from the values
> > > r
Dave Jones wrote:
I'm glad I'm not the only one who feels he's too dumb to see
the advantages of this. The added complexity to expose something
that in all cases, we actually don't want to expose seems a little
pointless to me.
For example, most of the x86 drivers, if you set a speed, and then
s
On Wed, 10 Aug 2005, Dave Jones wrote:
>
> For example, most of the x86 drivers, if you set a speed, and then
> start fiddling with the voltage, you can pretty much guarantee
> you'll crash within the next few seconds. They have to match,
> or at the least, be within a very small margin.
>
> Gi
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