From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750790AbVHQBwq (ORCPT ); Tue, 16 Aug 2005 21:52:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750791AbVHQBwq (ORCPT ); Tue, 16 Aug 2005 21:52:46 -0400 Received: from gateway-1237.mvista.com ([12.44.186.158]:2808 "EHLO av.mvista.com") by vger.kernel.org with ESMTP id S1750790AbVHQBwq (ORCPT ); Tue, 16 Aug 2005 21:52:46 -0400 Message-ID: <43029866.8040605@mvista.com> Date: Tue, 16 Aug 2005 18:52:38 -0700 From: Todd Poynor User-Agent: Mozilla Thunderbird 1.0+ (X11/20050531) MIME-Version: 1.0 To: Dominik Brodowski , Todd Poynor , cpufreq@lists.linux.org.uk, Patrick Mochel , linux-pm@lists.osdl.org, linux-kernel@vger.kernel.org, Pavel Machek Subject: Re: PowerOP 0/3: System power operating point management API References: <20050809024907.GA25064@slurryseal.ddns.mvista.com> <20050810100718.GC1945@elf.ucw.cz> <42FA796A.4080205@mvista.com> <20050809024907.GA25064@slurryseal.ddns.mvista.com> <42F963F6.60209@mvista.com> <20050809030000.GA25112@slurryseal.ddns.mvista.com> <20050816085345.GJ9150@dominikbrodowski.de> <20050816085740.GL9150@dominikbrodowski.de> In-Reply-To: <20050816085740.GL9150@dominikbrodowski.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Dominik Brodowski wrote: > A small add-on: > > We need to make sure that we're capable of handling smart CPUs like Transmeta > Crusoe processors in a sane way. This means > > >>b) Setting of "values" > > > is optional if the hardware itself can be set to a min/max value (step a > above in previous mail). Although I haven't looked into the Crusoe processor support, it may be that there is a different set of power parameters, not cpu speed directly, that are appropriate to manage on these platforms (after a brief look, seems to be a range of frequencies and some sort of flags)? If so, these sorts of machine-specific power parameters are what PowerOP is trying to address, allowing management of the underlying machine-specific stuff to upper layers that may be presenting an abstracted view of power/performance, such as CPU speed or speed ranges, to the user. Thanks, -- Todd