From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ladislav Michl Subject: Re: [PATCH 09/32] ARM: dts: omap3-gta04: make NAND partitions compatible with recent U-Boot Date: Wed, 25 Jul 2018 15:26:03 +0200 Message-ID: <20180725132603.GA21902@lenoch> References: <8dcf3efd3270451314a663c125841ca87ed2b387.1532501910.git.hns@goldelico.com> <20180725080735.GA7467@lenoch> <20180725083305.GB8303@lenoch> <85BC9F70-2E58-4915-9405-7CC1855975C4@goldelico.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <85BC9F70-2E58-4915-9405-7CC1855975C4@goldelico.com> Sender: linux-kernel-owner@vger.kernel.org To: "H. Nikolaus Schaller" Cc: Marek Belisko , =?iso-8859-2?Q?Beno=EEt?= Cousson , Tony Lindgren , Rob Herring , Mark Rutland , linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, letux-kernel@openphoenux.org List-Id: devicetree@vger.kernel.org On Wed, Jul 25, 2018 at 02:27:31PM +0200, H. Nikolaus Schaller wrote: > > > Am 25.07.2018 um 10:33 schrieb Ladislav Michl : > > > > On Wed, Jul 25, 2018 at 10:18:28AM +0200, H. Nikolaus Schaller wrote: > >> > >>> Am 25.07.2018 um 10:07 schrieb Ladislav Michl : > >>> > >>> On Wed, Jul 25, 2018 at 08:58:41AM +0200, H. Nikolaus Schaller wrote: > >>>> Vendor defined U-Boot has changed the partition scheme a while ago: > >>>> > >>>> * kernel partition 6MB > >>>> * file system partition uses the remainder up to end of the NAND > >>>> * increased size of the environment partition (to get an OneNAND compatible base address) > >>>> * shrink the U-Boot partition > >>>> > >>>> Let's be compatible (e.g. Debian kernel built from upstream). > >>> > >>> That, in fact, is breaking compatibility. > >> > >> With what? Nobody is using the old u-boot partition scheme any more > >> (it is >5 years old). > >> > >>> So once you are touching this > >>> what about relying on partitioning provided by bootloader just to prevent > >>> something like this happening again? > >> > >> Well, we define what compatible means here (since we are the vendor). > >> And people complain with us. We simply recommend them to upgrade the > >> boot-loader. > > > > Fair enough. Suggestion was to remove partitioning scheme from DTB alltogether > > and let U-Boot provide one. But you being vendor you decide, of course :) > > (I'd use only two partitions: MLO and UBI, latter one with BCH8, and store > > everything in UBI volumes. That's a bit more flexible approach) > > Yes, that is a good goal for a future setup and would of course be better. > Like U-Boot already provides the memory layout for RAM. > > Hopefully, someone will work out patches for u-boot plus kernel (which is always > painful to keep these two in sync and tested). But I don't want to do that now. At kernel side the only patch needed is to remove partitioning scheme from DTB and u-boot setup can be merely copied from board/isee/igep00x0 Not having hardware I cannot really test it ;-) Best regards, ladis