From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chanwoo Choi Subject: Re: [PATCHv3 2/8] devfreq: exynos: Add documentation for generic exynos memory bus frequency driver Date: Wed, 21 Jan 2015 13:20:57 +0900 Message-ID: <54BF2929.3090107@samsung.com> References: <1420681257-3078-1-git-send-email-cw00.choi@samsung.com> <1420681257-3078-3-git-send-email-cw00.choi@samsung.com> <54BE108F.8090506@samsung.com> <54BE3E10.2080906@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-reply-to: Sender: linux-kernel-owner@vger.kernel.org To: Viresh Kumar Cc: Rob Herring , MyungJoo Ham , Kukjin Kim , Kyungmin Park , "Wysocki, Rafael J" , Mark Rutland , a.kesavan@samsung.com, Tomasz Figa , =?UTF-8?B?S3J6eXN6dG9mIEtvesWCb3dza2k=?= , Bartlomiej Zolnierkiewicz , Rob Herring , InKi Dae , "linux-pm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-samsung-soc@vger.kernel.org" List-Id: linux-pm@vger.kernel.org On 01/21/2015 12:17 PM, Viresh Kumar wrote: > On 20 January 2015 at 17:07, Chanwoo Choi wrote: >> If each bus-block has separate regulator independently, each bus-block can be registered >> separately. But, exynos bus-blocks in mem-bus-group share the same regulator. > > This can be managed easily within the driver. Just stay the highest > voltage requested. If the clock will be stayed on highest voltage, will reduce the considerable benefit of power-consumption. I think it is DFS instead of DVFS. Is it right? > I don't think its not manageable. But it will be much more convenient > as that will show > the correct picture and get rid of unnecessarily virtualizing things.. What is the correct picture? do you need more detailed explanation of Exynos memory bus structure? Thanks, Chanwoo