From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Likely Subject: Re: [PATCH 0/2] PM / OPP: updates to enable sharing OPPs info Date: Sat, 20 Jul 2013 06:09:43 +0100 Message-ID: <20130720050943.5EB853E169C@localhost> References: <1367406679-21603-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> <519B45C3.8050700@arm.com> Return-path: In-Reply-To: <519B45C3.8050700@arm.com> Sender: linux-doc-owner@vger.kernel.org To: "rob.herring@calxeda.com" , "devicetree-discuss@lists.ozlabs.org" Cc: Sudeep KarkadaNagesha , "linux-kernel@vger.kernel.org" , "linux-pm@vger.kernel.org" , Rob Landley , "Rafael J. Wysocki" , Shawn Guo , "linux-doc@vger.kernel.org" List-Id: devicetree@vger.kernel.org On Tue, 21 May 2013 11:00:35 +0100, Sudeep KarkadaNagesha wrote: > Hi Rob, Grant, > > On 01/05/13 12:11, Sudeep KarkadaNagesha wrote: > > From: Sudeep KarkadaNagesha > > > > These are couple of updates to existing PM/OPP library to support > > sharing of OPPs between different device nodes. > > > > Currently all the cpu nodes are parsed until the OPPs are found. This > > is essential to support cpuhotplug without having to replicate OPP > > information in all the cpu nodes. > > > > However in systems with multiple cpu power domain, its better to have > > OPP entry for each cpu. To avoid replication, phandle can be specified > > to the node which contains the full OPP information. > > > Is proposed option of phandle for OPP acceptable to avoid replication ? > Any suggestions to proceed on this ? This is needed to support CPU > hotplug on big LITTLE system where current methods like parsing all the > nodes or just CPU0 node will not work. Looks fine to me. g.