From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RvrZO-0004hX-3J for barebox@lists.infradead.org; Fri, 10 Feb 2012 14:35:27 +0000 Date: Fri, 10 Feb 2012 15:35:14 +0100 From: Sascha Hauer Message-ID: <20120210143514.GK3852@pengutronix.de> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: what is the earliest i can get MLO to print out debugging info? To: "Robert P. J. Day" Cc: "U-Boot Version 2 (barebox)" On Fri, Feb 10, 2012 at 07:59:08AM -0500, Robert P. J. Day wrote: > > as a (sort of) followup to my last post on extending barebox to > recognize pandaboards, at the moment, i have a build that boots nicely > on an original panda but produces absolutely *no* output at all on a > panda ES. > > i know that barebox currently doesn't recognize the ES, but i'm > wondering if that's the real problem, and where i can put debugging > statements in to show something along the lines of, "hi, i'm just > starting to run MLO". > > surely there's an initial part of MLO that has to run before even > checking the revision of the board, so can i add some debugging that > would show that, or is it not even possible to set up the console > before recognizing the board? thanks. Is there a LED on the board? Then you could use it for bisecting the code. Setting up a console is not that easy as it may require setting up the iomuxer. Another way would be to setup a regular U-Boot on the board and start the MLO from there. Then you can just do a writel to the UARTs tx register. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox