From owner-freebsd-arm@FreeBSD.ORG Mon Mar 3 04:05:12 2014 Return-Path: Delivered-To: freebsd-arm@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9E84CE8C for ; Mon, 3 Mar 2014 04:05:12 +0000 (UTC) Received: from mho-02-ewr.mailhop.org (mho-02-ewr.mailhop.org [204.13.248.72]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 7129E2E6 for ; Mon, 3 Mar 2014 04:05:12 +0000 (UTC) Received: from c-24-8-230-52.hsd1.co.comcast.net ([24.8.230.52] helo=damnhippie.dyndns.org) by mho-02-ewr.mailhop.org with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.72) (envelope-from ) id 1WKK7r-0001Fi-CF; Mon, 03 Mar 2014 04:05:11 +0000 Received: from [172.22.42.240] (revolution.hippie.lan [172.22.42.240]) by damnhippie.dyndns.org (8.14.3/8.14.3) with ESMTP id s23458lD046138; Sun, 2 Mar 2014 21:05:08 -0700 (MST) (envelope-from ian@FreeBSD.org) X-Mail-Handler: Dyn Standard SMTP by Dyn X-Originating-IP: 24.8.230.52 X-Report-Abuse-To: abuse@dyndns.com (see http://www.dyndns.com/services/sendlabs/outbound_abuse.html for abuse reporting information) X-MHO-User: U2FsdGVkX1/oEQak62qw4ACXqmF8A5/n Subject: Re: Raspberry Pi Clock Frequency From: Ian Lepore To: Jordan Starcher In-Reply-To: References: Content-Type: text/plain; charset="us-ascii" Date: Sun, 02 Mar 2014 21:05:08 -0700 Message-ID: <1393819508.1149.274.camel@revolution.hippie.lan> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit Cc: "freebsd-arm@freebsd.org" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Mar 2014 04:05:12 -0000 On Thu, 2014-01-23 at 23:31 -0500, Jordan Starcher wrote: > Hi, > > I was wondering if it is possible to adjust the CPU frequency on the > Raspberry Pi under FreeBSD 10.0-RELEASE? I've been trying to find what the > clock is currently set at using sysctl but I cannot seem to find any values > that show the frequency. I also checked the FreeBSD kernel source and did > not see any related tunable aside from hw.bcm2835.min_freq. Is this the > tunable I would use? > > Thanks, > Jordan I just realized this never got answered, sorry about that. That tunable you mention was a workaround for rpi sdcard problems, and it never actually helped anyway and should probably be removed. If there's a way to change the cpu frequency, it's not in the scanty little doc I've got about that processor. If it can be done, the how-to can probably be found in the linux source, but I don't have time to work on it. -- Ian