From noodles@earth.li Thu Apr 02 16:15:00 2009 Received: from the.earth.li ([217.147.81.2]) by stoneboat.aleph1.co.uk with esmtp (Exim 4.69) (envelope-from ) id 1LpOd5-0002sZ-8V for balloon@balloonboard.org; Thu, 02 Apr 2009 16:15:00 +0100 Received: from noodles by the.earth.li with local (Exim 4.63) (envelope-from ) id 1LpOd4-0005ZF-LG; Thu, 02 Apr 2009 16:14:54 +0100 Date: Thu, 2 Apr 2009 16:14:54 +0100 From: Jonathan McDowell To: Chris Jones Message-ID: <20090402151454.GI11477@earth.li> References: <49D3B00A.4030806@martin-jones.com> <20090401220605.GB5306@earth.li> <49D47369.2040803@martin-jones.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <49D47369.2040803@martin-jones.com> User-Agent: Mutt/1.5.13 (2006-08-11) X-SA-Exim-Connect-IP: 217.147.81.2 X-SA-Exim-Mail-From: noodles@earth.li X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on stoneboat.aleph1.co.uk X-Spam-Level: X-Spam-Status: No, score=-4.4 required=5.0 tests=AWL,BAYES_00, RCVD_IN_DNSWL_LOW autolearn=ham version=3.2.5 X-SA-Exim-Version: 4.2.1 (built Wed, 25 Jun 2008 17:14:11 +0000) X-SA-Exim-Scanned: Yes (on stoneboat.aleph1.co.uk) Cc: balloon@balloonboard.org Subject: Re: [Balloon] 2.6.29-rc7 kernel power management X-BeenThere: balloon@balloonboard.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Balloon List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Apr 2009 15:15:00 -0000 On Thu, Apr 02, 2009 at 09:12:25AM +0100, Chris Jones wrote: > Jonathan McDowell wrote: > > On Wed, Apr 01, 2009 at 07:18:50PM +0100, Chris Jones wrote: [power saving] > > Is this code in SVN now? I'm currently concentrating on getting the base > > balloon3 support into mainline kernels, but I'll have a look if that > > ever gets done. > > Yes - I folded the changes into balloon3.patch. Ah, simple enough then. > >> The same issue arises with the Samosa bus - did parking the bus lines > >> ever get in after the grand TCL kernel hacking session? I can't see it > >> in the code. > > > > No, this didn't get added so you're not missing anything. > > OK. If I was to put in the relevant code, I assume it would go at the > tail end of samosa_suspend_late() and the head end of > samosa_resume_early(), bracketing the power management of the devices on > the bus. Hmm. I think that'll probably work ok. From my reading of Documentation/power/devices.txt bus->suspend_late/bus->suspend_early get called for each device on the bus, but after suspend/before resume is called for any of them. > I propose making the registers set/reset, since: > - it uses less logic resource in the hardware than making them readable > - I've already got a VHDL module which does the job > - it makes changing individual bits an atomic operation, leaving no gap > between a read and a writeback which could get interrupted Sounds reasonable. > There are a couple of bits we need to be able to read, as well. Hold > tight for a Balloon 3 register remap. On a sort of related note, can someone provide me with a known good built copy of bootldr/the FPGA code to put on my loon3? I seem to be running a bootldr from last May or so and I don't have JTAG so can't afford to get it wrong. J. -- Web [ Keyboard: Used for entering errors into a system. ] site: http:// [ ] Made by www.earth.li/~noodles/ [ ] HuggieTag 0.0.23