From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: Re: [PATCH 1/2] PM / Domains: Introduce domain-performance-state binding Date: Mon, 28 Nov 2016 10:27:57 -0800 Message-ID: <4f815e31-22d0-fef7-953c-257fa2bbcb9d@codeaurora.org> References: <20161121150708.j4gosfr2uetc7mwp@rob-hp-laptop> <20161122031717.GE10014@vireshk-i7> <20161124020322.GI6095@codeaurora.org> <20161124044020.GC9376@vireshk-i7> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20161124044020.GC9376@vireshk-i7> Sender: linux-kernel-owner@vger.kernel.org To: Viresh Kumar 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 List-Id: linux-pm@vger.kernel.org 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