From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 12 Sep 2013 09:34:00 +0200 (CEST) Received: from nbd.name ([46.4.11.11]:47816 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S6867625Ab3ILHd5k24tl (ORCPT ); Thu, 12 Sep 2013 09:33:57 +0200 Message-ID: <52316E5D.4020100@phrozen.org> Date: Thu, 12 Sep 2013 09:33:49 +0200 From: John Crispin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.12) Gecko/20130116 Icedove/10.0.12 MIME-Version: 1.0 To: Lars-Peter Clausen CC: "Steven J. Hill" , linux-mips@linux-mips.org, Leonid Yegoshin , ralf@linux-mips.org Subject: Re: [PATCH v2] MIPS: GIC: Select R4K counter as fallback. References: <1378929101-7021-1-git-send-email-Steven.Hill@imgtec.com> <52316D28.5000100@metafoo.de> In-Reply-To: <52316D28.5000100@metafoo.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 37796 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: john@phrozen.org Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips On 12/09/13 09:28, Lars-Peter Clausen wrote: > On 09/11/2013 09:51 PM, Steven J. Hill wrote: >> From: Leonid Yegoshin >> >> If CONFIG_CSRC_GIC is selected and the GIC is not found during >> boot, then fallback to the R4K counter gracefully. > > Is there any reason not to always register the r4k clocksource, no matter > whether the gic clocksource is present or not? The timekeeping core of the > kernel will make sure to use the best available clocksource based on the > clocksource's rating. > > - Lars Hi, in theory yes, but the r4k csrc is coded in a way that it always assumes to always be present and always be running. John