From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: Re: CPUIdle for Exynos5422 Odroid-XU3/XU4 boards. Date: Thu, 20 Aug 2015 20:50:46 +0200 Message-ID: <55D62186.1080002@linaro.org> References: <55D5FBDB.4040904@free.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-pd0-f177.google.com ([209.85.192.177]:35675 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750986AbbHTSus (ORCPT ); Thu, 20 Aug 2015 14:50:48 -0400 Received: by pdob1 with SMTP id b1so17163275pdo.2 for ; Thu, 20 Aug 2015 11:50:48 -0700 (PDT) In-Reply-To: Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Anand Moon , Daniel Lezcano Cc: =?UTF-8?B?S3J6eXN6dG9mIEtvesWCb3dza2k=?= , Kukjin Kim , Bartlomiej Zolnierkiewicz , "linux-samsung-soc@vger.kernel.org" On 08/20/2015 08:15 PM, Anand Moon wrote: > Hi Daniel, > > On 20 August 2015 at 21:40, Daniel Lezcano w= rote: >> On 08/20/2015 12:54 PM, Anand Moon wrote: >>> >>> Hello Krzysztof/Kukjim, >>> >>> CPUIdle seen to be not working for Exynos5422 Odroid boards. >>> >>> Is their any way this feature will be implemented in the future. >> >> >> Yeah a good willing to fix the bl1. More than one year asking for th= at ! >> nooo way !! >> >> Your answer is at the end of >> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/3506= 32.html >> >> > > Thanks for the explanation. > > I was just referring following the source code. > > https://github.com/hardkernel/linux/blob/odroidxu3-3.10.y/arch/arm/ma= ch-exynos/cpuidle-exynos5422.c Ah, thanks for the pointer. So for my information, is that driver not=20 working with the exynos5422 ? > It seem that cpufreq and cpuidle go hand in hand. At the first glance, there is a dependency with the cluster power state= =2E=20 It is not allowed to enter the cluster power down if another subsystem=20 deny it. The driver itself is a pack of hacks based on cpuidle legacy=20 code and wildly backported from older kernels with arbitrary latency an= d=20 residency values. --=20 Linaro.org =E2=94=82 Open source software fo= r ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog