From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-io0-x242.google.com ([2607:f8b0:4001:c06::242]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fQsNK-0003g3-Vc for barebox@lists.infradead.org; Thu, 07 Jun 2018 10:42:40 +0000 Received: by mail-io0-x242.google.com with SMTP id t6-v6so11234041iob.10 for ; Thu, 07 Jun 2018 03:42:28 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20180607085312.xtrjlsmuxfvfv4jj@pengutronix.de> References: <20180606151602.11094-1-pvizeli@syshack.ch> <20180607072037.3jw4exty4huobpm6@pengutronix.de> <20180607085312.xtrjlsmuxfvfv4jj@pengutronix.de> From: Pascal Vizeli Date: Thu, 7 Jun 2018 12:42:27 +0200 Message-ID: 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" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 1/1] command: oftree: support load device tree from memory To: Sascha Hauer Cc: barebox@lists.infradead.org, Pascal Vizeli That sounds good. Thanks for the direction. My workaround look like: memcpy -d /tmp/rpi.dtb 0xf42400 0 0x10000 of_dump -f /tmp/rpi.dtb > /dev/null oftree -f -l /tmp/rpi.dtb Without 'of_dump', the 'oftree' give a bad magic 0x5.... error. I need add support for HassOS to raspberry and in a second round I will try to implement your suggestion. best regards Pascal 2018-06-07 10:53 GMT+02:00 Sascha Hauer : > On Thu, Jun 07, 2018 at 10:29:53AM +0200, Pascal Vizeli wrote: >> Thanks for this workaround. I will use this. >> >> I will later send a patch they store the device tree address on >> raspberry into a variable. >> So that user can load this, if he need it. >> >> The question is now, would you allow to load a device tree with a >> memory address on oftree utility? >> And if yes, where is the best place to add this function. > > Instead of a command I would prefer if you could just store r2 from > the original bootloader you have been started with, and in a board > specific initcall you copy the devicetree you found in memory to a > file. Then the user has access to the devicetree with regular file > commands and there is no need to guess the memory address where the > original bootloader stored the device tree. > > 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