From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932956AbaEEOXj (ORCPT ); Mon, 5 May 2014 10:23:39 -0400 Received: from mail-wi0-f170.google.com ([209.85.212.170]:60518 "EHLO mail-wi0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932636AbaEEOXh (ORCPT ); Mon, 5 May 2014 10:23:37 -0400 MIME-Version: 1.0 In-Reply-To: References: <000001cf643d$69e5e350$3db1a9f0$@samsung.com> <003901cf6664$e4e8d2a0$aeba77e0$@samsung.com> <5367946F.1030407@ti.com> Date: Mon, 5 May 2014 09:23:36 -0500 X-Google-Sender-Auth: nujfjDj_6fDV-aEDWK7Gxfk3TgI Message-ID: Subject: Re: [PATCH 1/3] PM / OPP: Add support for descending order for cpufreq table From: Nishanth Menon To: Viresh Kumar Cc: Jonghwan Choi , Linux PM list , open list , "Rafael J. Wysocki" , Len Brown , Amit Daniel Kachhap Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 5, 2014 at 9:14 AM, Viresh Kumar wrote: > > To be precise, for exynos they need the position of a frequency when > it is arranged in descending order. And they will simply write this position > in their clock controller later. For example, if frequencies are: > 100 MHz, 200, 300, 400, 500, 600 > > Then they need to write 1 for 600, 2 for 500, 3 for 400, and so on.. > I am not able to imaging how ceil/floor would help here. ceil and floor allows us to walk down the opp entries the direction we want it to. one can convert that data any way one wants it - especially when custom mapping such as this is desired. Regards, Nishanth Menon