From mboxrd@z Thu Jan 1 00:00:00 1970 From: Todd Poynor Subject: Re: PowerOP 0/3: System power operating point management API Date: Tue, 16 Aug 2005 18:52:38 -0700 Message-ID: <43029866.8040605@mvista.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20050816085740.GL9150@dominikbrodowski.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.osdl.org Errors-To: linux-pm-bounces@lists.osdl.org To: Dominik Brodowski , Todd Poynor , cpufreq@lists.linux.org.uk, Patrick Mochel , linux-pm@lists.osdl.org, linux-kernel@vger.kernel.org, Pavel Machek List-Id: linux-pm@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