Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755166AbcK1SbD (ORCPT ); Mon, 28 Nov 2016 13:31:03 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:50450 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754112AbcK1S2B (ORCPT ); Mon, 28 Nov 2016 13:28:01 -0500 DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 1C90761307 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=sboyd@codeaurora.org Subject: Re: [PATCH 1/2] PM / Domains: Introduce domain-performance-state binding To: Viresh Kumar References: <20161121150708.j4gosfr2uetc7mwp@rob-hp-laptop> <20161122031717.GE10014@vireshk-i7> <20161124020322.GI6095@codeaurora.org> <20161124044020.GC9376@vireshk-i7> Cc: Kevin Hilman , Vincent Guittot , Rob Herring , Rafael Wysocki , "linaro-kernel@lists.linaro.org" , "linux-pm@vger.kernel.org" , linux-kernel , Mark Rutland , Ulf Hansson , Lina Iyer , "devicetree@vger.kernel.org" , Nayak Rajendra From: Stephen Boyd Message-ID: <4f815e31-22d0-fef7-953c-257fa2bbcb9d@codeaurora.org> Date: Mon, 28 Nov 2016 10:27:57 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <20161124044020.GC9376@vireshk-i7> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 909 Lines: 19 On 11/23/2016 08:40 PM, Viresh Kumar wrote: > On 23-11-16, 18:03, Stephen Boyd wrote: >> On 11/23, Kevin Hilman wrote: >>> Vincent Guittot writes: >>>> On 23 November 2016 at 16:51, Kevin Hilman wrote: >>>>> Then, at least for this use case, we're talking about voltage, not some >>>>> unspecified units. >> In some cases we actually know the voltage of the domain and >> would want to put some voltage mapping in DT. For example, level >> 1 is voltage 2V and level 2 is voltage 2.5V. > But even in these cases we wouldn't be using the voltage values within the > kernel as we will be giving only a performance state to the M3 core, right? Nope. In these cases we need to set a certain voltage and we do that by requesting it via the M3 core. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project