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Date: Mon, 8 Jun 2009 15:58:16 +0100 From: Matthew Garrett <mjg@...hat.com> To: "Michael S. Zick" <lkml@...ethan.org> Cc: Harald Welte <HaraldWelte@...tech.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Duane Griffin <duaneg@...da.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Dave Jones <davej@...hat.com> Subject: Re: [PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs On Mon, Jun 08, 2009 at 09:25:09AM -0500, Michael S. Zick wrote: > On Mon June 8 2009, Harald Welte wrote: > > The VIA/Centaur C7, C7-M and Nano CPU's all support ACPI based cpu p-states > > using a MSR interface. The Linux driver just never made use of it, since in > > addition to the check for the EST flag it also checked if the vendor is Intel. > > > > It looks like we should modify (conditional on ...MVIAC7 at build, model='d' runtime) > the acpi-cpufreq controls to deal properly with the Model-D adaptive controller. Can't make it build-time dependent - distribution kernels may not explicitly support the C7. It's valid to have a vendor=centaur conditional that turns off any adaptive control if appropriate ACPI methods are present. -- Matthew Garrett | mjg59@...f.ucam.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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