From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fSJsE-0008MP-8v for linux-mtd@lists.infradead.org; Mon, 11 Jun 2018 10:16:34 +0000 Date: Mon, 11 Jun 2018 12:16:18 +0200 From: Boris Brezillon To: Yogesh Narayan Gaur Cc: "marek.vasut@gmail.com" , Frieder Schrempf , "linux-mtd@lists.infradead.org" , "linux-spi@vger.kernel.org" , "dwmw2@infradead.org" , "computersforpeace@gmail.com" , "richard@nod.at" , "miquel.raynal@bootlin.com" , "broonie@kernel.org" , David Wolfe , Fabio Estevam , Prabhakar Kushwaha , Han Xu , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH 03/11] spi: Add a driver for the Freescale/NXP QuadSPI controller Message-ID: <20180611121618.40f4b609@bbrezillon> In-Reply-To: References: <1527686082-15142-1-git-send-email-frieder.schrempf@exceet.de> <1527686082-15142-4-git-send-email-frieder.schrempf@exceet.de> <20180608145130.09f979f9@bbrezillon> <20180611094616.5c8f82cf@bbrezillon> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 11 Jun 2018 09:38:14 +0000 Yogesh Narayan Gaur wrote: > > > Observation 3: > > > As we can support JFFS2 filesystem on NOR flash, so we can expect JFFS2 commands should work fine on NOR flash. > > > But with this driver change my mount command is not working. > > > > > > In my target there are 2 flash slave devices connected, and I have given argument to create MTD partition like "mtdparts=20c0000.quadspi-1:5M(rcw),10M(test),46M(rootfs) " for 2nd flash. > > > Below is output for /proc/mtd commands > > > root@ls1012ardb:~# cat /proc/mtd > > > dev: size erasesize name > > > mtd0: 04000000 00040000 "20c0000.quadspi-0" --> First 64MB flash > > > mtd1: 00500000 00040000 "rcw" --> Second 64 MB flash device, 3 MTD partition are created for it. > > > mtd2: 00a00000 00040000 "test" > > > mtd3: 02e00000 00040000 "rootfs" When I do mtd1 + mtd2 + mtd3, I end up with 0x3d00000 instead of 0x4000000. Is that normal? Do you reserve a bit of space at the end or is it that rcw is not starting at 0? > > > > > > root@ls1012ardb:~# mkdir /media/ram ; flash_eraseall /dev/mtd3 > > > flash_eraseall has been replaced by `flash_erase 0 0`; please use it > > > Erasing 256 Kibyte @ 0 -- 0 % complete [ 18.299929] random: crng init done > > > Erasing 256 Kibyte @ 2dc0000 -- 100 % complete > > > root@ls1012ardb:~# mount -t jffs2 /dev/mtdblock3 /media/ram/ > > > > > > This command didn't finish successfully and there are lot of messages coming on console mentioning failure in jffs2_scan_eraseblock() > > > [ 187.118677] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x013c0000: 0x2886 instead Did you try to create a smaller partition? Maybe we have a problem when accessing addresses higher than X with the new driver (X to be determined). > > > [ 187.128159] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x013c0004: 0x7a3b instead > > > [ 187.137641] jffs2: jffs2_scan_eraseblock(): Magic bitmask > > > 0x1985 not found at 0x013c0008: 0xb10f instead > > >