Hi Boris, -----Original Message----- From: Boris Brezillon [mailto:boris.brezil...@bootlin.com] Sent: Monday, June 11, 2018 3:46 PM To: Yogesh Narayan Gaur <yogeshnarayan.g...@nxp.com> Cc: marek.va...@gmail.com; Frieder Schrempf <frieder.schre...@exceet.de>; linux-...@lists.infradead.org; linux-...@vger.kernel.org; dw...@infradead.org; computersforpe...@gmail.com; rich...@nod.at; miquel.ray...@bootlin.com; broo...@kernel.org; David Wolfe <david.wo...@nxp.com>; Fabio Estevam <fabio.este...@nxp.com>; Prabhakar Kushwaha <prabhakar.kushw...@nxp.com>; Han Xu <han...@nxp.com>; linux-kernel@vger.kernel.org Subject: Re: [PATCH 03/11] spi: Add a driver for the Freescale/NXP QuadSPI controller
On Mon, 11 Jun 2018 09:38:14 +0000 Yogesh Narayan Gaur <yogeshnarayan.g...@nxp.com> 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? I have given partition size n bootargs as mtdparts=20c0000.quadspi-1:5M(rcw),10M(test),46M(rootfs) 5 + 10 + 46 ==> 61M i.e. 0x3d00000. I have just reserve the bit at the end, we can modify these settings also. > > > > > > root@ls1012ardb:~# mkdir /media/ram ; flash_eraseall /dev/mtd3 > > > flash_eraseall has been replaced by `flash_erase <mtddev> 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). Would try and update you. -- Regards Yogesh Gaur > > > [ 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 > > >
