From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sudeep Holla Subject: Re: [PATCH V4 1/9] PM / OPP: Allow OPP table to be used for power-domains Date: Tue, 18 Apr 2017 17:03:11 +0100 Message-ID: <2128c09a-0656-0878-c4e7-c327007021c7@arm.com> References: <468e756b-7112-4006-b31d-9fcf1c32673d@arm.com> <20170413055049.GN5910@vireshk-i7> <854e3f66-6f93-2b90-14a9-7eaea6a0b74c@arm.com> <20170417053303.GG28191@vireshk-i7> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20170417053303.GG28191@vireshk-i7> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Viresh Kumar Cc: Sudeep Holla , Rafael Wysocki , ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, Kevin Hilman , Viresh Kumar , Nishanth Menon , Stephen Boyd , linaro-kernel-cunTk1MwBs8s++Sfvej+rw@public.gmane.org, linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Vincent Guittot , robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, lina.iyer-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, rnayak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On 17/04/17 06:33, Viresh Kumar wrote: > On 13-04-17, 14:43, Sudeep Holla wrote: >> Interesting. My understand of power domain and in particular power >> domain performance was that it would control both. The abstract number >> you introduce would hide clocks and regulators. >> >> But if the concept treats it just as yet another regulator, we do we >> need these at all. Why don't we relate this performance to regulator >> values and be done with it ? >> >> Sorry if I am missing to understand something here. I would look this as >> replacement for both clocks and regulators, something similar to ACPI >> CPPC. If not, it looks unnecessary to me with the information I have got >> so far. > > I kind of answered that in the other email. > > Some background may be good here. So Qcom tried to solve all this with virtual > regulators, but the problem was that they need to talk in terms of integer > values (1, 2, 3..) and not voltages and so they can't use the regulator > framework straight away. And so we are doing all this. > Was it posted externally ? Was there any objections for that approach ? IMO that's better approach but if I am late to the party, I would like to read through the discussions that happened on it(if any) -- Regards, Sudeep -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html