From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick .. Date: Wed, 24 Aug 2005 14:57:25 +0200 (MEST) Subject: [U-Boot-Users] =?ISO-8859-1?Q?Re:_[U-Boot-Users]_AT91RM9200_Errata_(Was:_CSB637_support_?= =?ISO-8859-1?Q?-_big_bug..)?= References: Message-ID: <4695.1124888245@www46.gmx.net> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de > "Patrick .." schreibt: > >On another note, is there any reason you chose a master clock divisor of > 4 > >instead of 3 for the CSB637? > > Hi, > > like I already said: > "I got the clock values from linux 2.6.12 board-csb637.c" > I didn't choose them myself. > > >I have looked over the data sheets for all relevant devices (SDRAM, > >StrataFlash) and they definitely support at least 60Mhz (what divider 3 > >gives). > > Feel free to change it, then (but please make sure to update > arch/arm/mach-at91rm9200/board-csb637.c accordingly, otherwise > at least the serial interfaces will not work). > > Cheers > Anders > > P.S.: PLEASE keep the list CC'ed. > No proglems, list is CC'd!! :) Linux still appears to boot fine right up until it says. RAMDISK: Couldn't find valid RAM disk image starting at 0. Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) which is expected. You are correct, the /arch/arm/mach-at91rm9200/board-csb637.c file had to be edited in order to work with the new master clock. I believe there is a way of detecting clock speeds which i will look up later. This would be better than them being hard-coded. This is probably a bit off topic for this list, but does anyone know a way of making ram disk images that doesn't require root access (which i don't have on the box i am working on) I am aware of the following method: dd if=/dev/zero of=rootfs.img bs=1k count=400 mkfs.ext2 -c rootfs.img mount -o loop rootfs.img /mntpoint cp -av rootfs/* /mntpoint umount /mntpoint gzip -v9 -c rootfs.img >rootfs.gz However mount requires root access :( -Patrick -- GMX DSL = Maximale Leistung zum minimalen Preis! 2000 MB nur 2,99, Flatrate ab 4,99 Euro/Monat: http://www.gmx.net/de/go/dsl