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 merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TZ278-0003FV-PY for barebox@lists.infradead.org; Thu, 15 Nov 2012 16:16:28 +0000 Date: Thu, 15 Nov 2012 17:16:15 +0100 From: Sascha Hauer Message-ID: <20121115161615.GI10369@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: how easy to add extra config for NAND-less beagle? To: "Robert P. J. Day" Cc: "U-Boot Version 2 (barebox)" Hi Robert, On Thu, Nov 15, 2012 at 09:36:37AM -0500, Robert P. J. Day wrote: > > returning to playing with barebox after lengthy hiatus and i asked > an equivalent question on the u-boot list, let's see if it's relevant > here. > > i did a regular configure and build for my beagle xM (rev C) which, > unlike the beagle classic, has no NAND flash: > > $ make omap3530_beagle_xload_defconfig ; make > $ make omap3530_beagle_defconfig ; make > > then copied MLO and barebox.bin to an appropriate card and, lo, it > booted nicely and i'm currently sitting in barebox: > > barebox@Texas Instrument's Beagle:/ version > > barebox 2012.10.0-00283-gd65d9df #2 Thu Nov 15 06:45:21 EST 2012 > > thing is, this build has a good deal of NAND-related functionality > that is of no use whatsoever on the current beagle xMs, so i'm > interested in how little work it would take to add an extra config > that would deselect everything related to NAND. (obviously, having > that functionality there doesn't *hurt*, but i'm planning to use > barebox in my new embedded linux courses and it would be nice to be > able to build for an xM and have it *totally* correspond to the actual > hardware.) it shouldn't be hard -- simply deselecting anything > related to NAND, MTD or JFFS2 should do the trick. Disable MTD support and if you want also the protect/erase commands: make menuconfig Drivers ---> [ ] Memory Technology Device (MTD) support ---> commands ---> flash ---> [ ] protect/erase Saves you around 35Kb of binary space > > rday > > p.s. when i run "devinfo", i see a couple NAND-related entries: > > devices: > ... snip ... > `---- gpmc_nand0 The nand device, probably present even when you disable nand support. However, no driver will bind to it if you disable it. 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