From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 16 May 2022 10:09:40 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nqVnQ-00FLiN-RY for lore@lore.pengutronix.de; Mon, 16 May 2022 10:09:40 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nqVnP-00012l-FP for lore@pengutronix.de; Mon, 16 May 2022 10:09:40 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2X8Jw6hsOIHJAvovGYoRttDTlDxsPpMV7erImaRWATw=; b=4zuihoH5YHTaZA Jt99GTyUdNoTdrE4dqofjqTEWqj5ZkILSm2gzF9slNLFT2hQbWTbZot3yIQP5iF+j6epiJ9aNxzqj izaV3aKGIKCx5bXVxGinxSuskRpUd9l3STqtCz14XHzeoYzgGSwohmKU94FRYJD6GTt1TjL6Xnqct wmak8f2rG9JOCGbucLGCrnDiNIYPyoX5pWEduIsWeKpB69cCqvKwcd3NWcD8Cb8aAhUHiNjseisx+ HGD+rTcrkpVi7QFm1J9wCMe6gOpkdjRwMrViRptXXaMjO62jVNTGyeEHDrkZylkh1RDpO3ReZ0qLb OMf81xfEPJUWSspp74CA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqVlt-006b6f-01; Mon, 16 May 2022 08:08:05 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqVln-006b5i-K6 for barebox@lists.infradead.org; Mon, 16 May 2022 08:08:01 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nqVlh-0000vx-UT; Mon, 16 May 2022 10:07:53 +0200 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1nqVlh-00022S-Br; Mon, 16 May 2022 10:07:53 +0200 Date: Mon, 16 May 2022 10:07:53 +0200 From: Sascha Hauer To: Matthias Fend Cc: barebox@lists.infradead.org Message-ID: <20220516080753.GG25578@pengutronix.de> References: <1607cab4-d2d3-b5be-99f1-f9f7347d1888@emfend.at> <20220513110055.GE25578@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 10:04:43 up 46 days, 20:34, 76 users, load average: 0.65, 0.68, 0.47 User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_010759_696782_D58BF863 X-CRM114-Status: GOOD ( 33.66 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list 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" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.8 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: One barebox image for multiple boards X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) On Fri, May 13, 2022 at 02:10:32PM +0200, Matthias Fend wrote: > Hi Sascha, > > Am 13.05.2022 um 13:00 schrieb Sascha Hauer: > > Hi Matthias, > > > > On Fri, May 13, 2022 at 10:55:02AM +0200, Matthias Fend wrote: > > > Hi, > > > > > > I'm looking for a solution to support multiple boards with just one barebox > > > image. The few core components that are relevant for barebox are the same on > > > all boards, so that the same barebox image runs on all boards. It is > > > possible to dynamically detect the board type inside barebox, but as this > > > requires some infrastructure it is not possible during lowlevel init. So > > > basically Barebox should boot with a minimal core device tree, detect the > > > board type and then use the corresponding device tree of the detected board. > > > Something similar to arch/arm/boards/stm32mp15xx-dkx/lowlevel.c but not at > > > low level. > > > > Do you even need the full device tree in barebox? The minimal core > > device tree might be enough for barebox and only the kernel is then > > booted with the full device tree. > > If there is no trick to changing the used device tree at boardlevel init, > then this might be a possibility. Replacing the live tree after it has been partly probed already is dangerous and barebox is not really prepared for that. > The core device tree might not be as minimal then and in exceptional cases > minor fixups in the board code will be needed, but I think it could work. > > In such a case, how should one ensure that the appropriate blspec entry is > booted? Maybe by simply replacing/updating the compatible string in the live > device tree after the board was detected? As it happens Oleksij has just introduced of_prepend_machine_compatible() exactly for this usecase. You can find it in current next branch. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 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