Messages in this thread | | | From | (Linus Torvalds) | Subject | Re: [PATCH][2.5.32] CPU frequency and voltage scaling (0/4) | Date | Thu, 29 Aug 2002 18:47:39 +0000 (UTC) |
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In article <1030618420.7290.112.camel@irongate.swansea.linux.org.uk>, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: >> { min-Hz, max-Hz, policy } >> > >For a few of the processors "event-hz" or similar would be nice. The >Geode supports hardware assisted bursting to full processor speed when >doing SMM, I/O and IRQ handling.
Hmm.. I would assume that you'd just use the high frequency for that? So, for example, assuming you have a 600/300 Geode, when you do
{ 0, ~0UL, "power-save" }
that would tell the Geode driver to run at 300MHz normally ("power-save"), and at 600Mhz when doing critical events.
In contrast, a
{ 0, ~0UL, "performance" }
mode would mean that it always runs at 600MHz (modulo heat throttling, of course).
And a
{ 300, 300, "power-save" }
means that you want the chip to always run at 300MHz, even when handling critical events.
I don't know the exact details of what kinds of frequencies the Geode supports, but it sounds to me like you don't really need another frequency value..
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