Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752909Ab3EUKAh (ORCPT ); Tue, 21 May 2013 06:00:37 -0400 Received: from service87.mimecast.com ([91.220.42.44]:33149 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751533Ab3EUKAf convert rfc822-to-8bit (ORCPT ); Tue, 21 May 2013 06:00:35 -0400 Message-ID: <519B45C3.8050700@arm.com> Date: Tue, 21 May 2013 11:00:35 +0100 From: Sudeep KarkadaNagesha User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: "grant.likely@linaro.org" , "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" Subject: Re: [PATCH 0/2] PM / OPP: updates to enable sharing OPPs info References: <1367406679-21603-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> In-Reply-To: <1367406679-21603-1-git-send-email-Sudeep.KarkadaNagesha@arm.com> X-OriginalArrivalTime: 21 May 2013 10:00:31.0828 (UTC) FILETIME=[07A5A140:01CE560A] X-MC-Unique: 113052111003218201 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1146 Lines: 29 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. Regards, Sudeep -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/