From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: Re: [PATCH V3 0/8] ARM: cpuidle: Unify the ARM64/ARM DT approach Date: Fri, 20 Mar 2015 19:39:23 +0100 Message-ID: <550C695B.7080200@linaro.org> References: <1426851841-2072-1-git-send-email-daniel.lezcano@linaro.org> <20150320183111.GA8891@red-moon> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20150320183111.GA8891@red-moon> Sender: linux-pm-owner@vger.kernel.org To: Lorenzo Pieralisi Cc: "rjw@rjwysocki.net" , "linux-pm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Catalin Marinas , "robherring2@gmail.com" , "arnd@arndb.de" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "lina.iyer@linaro.org" , "sboyd@codeaurora.org" List-Id: devicetree@vger.kernel.org On 03/20/2015 07:31 PM, Lorenzo Pieralisi wrote: > Hi Daniel, > > On Fri, Mar 20, 2015 at 11:43:53AM +0000, Daniel Lezcano wrote: >> There is a big number of cpuidle drivers for the ARM architecture. >> >> These drivers have been cleaned up and grouped into the drivers/cpui= dle >> directory to keep track of the changes more easily and ensure the co= de >> is following the same scheme across the drivers. >> >> That had the benefit of simplifying the code and factor out a lot of= common >> parts. Beside that, as the drivers belong to the 'drivers' directory= , we had >> to split the arch specific bits and the generic code in order to kee= p >> everything self contained. The platform driver paradigm was used for= this >> purpose. >> >> Unfortunately, this approach is now no longer accepted and a differe= nt solution >> must be provided to reach the same goal: one example is the Qualcomm= cpuidle >> driver upstreaming attempt. >> >> In the meantime, ARM64 developed a generic cpuidle driver based on D= T definition. >> >> The DT definition provides an 'enable-method' to specify one of the = cpu >> operations (PSCI, ...). >> >> This patchset unify this driver with ARM32, using the same DT defini= tion. >> >> Thanks with this patchset we can use the 'enable-method' to specify = a cpu >> operations, hence get rid of the platform driver approach and go fur= ther in the >> cpuidle driver flexibility via the DT. > > I had a look and the series seems fine, if you have a branch I can pu= ll from > I will test on arm64 and add the required tags. Yes, sure. http://git.linaro.org/git-ro/people/daniel.lezcano/linux.git cpuidle/4.= 1 Thanks ! -- Daniel --=20 Linaro.org =E2=94=82 Open source software fo= r ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog