On Mon, 2005-02-21 at 11:44 +0100, Ulrich Eckhardt wrote: > Disclaimer: I'm far from being a kernel expert, so if I'm talking crap > somebody please enlighten me. I just looked at the code and saw what to me > looked inconsistent. > I'm no kernel expert either, so no comments from me :) > > I can see the partitions in /dev/mtd now, but I have not thoroughly > > tested it yet to see if there are any other problems. > > Can you tell me how you created /dev/mtd? My version (Debian/x86) of MAKEDEV > doesn't know these. Also, could you tell me how you configured your kernel? I > have never seen an MTD working, so I don't even know if what I'm doing is > supposed to work. :( > I used a CVS checkout of buildroot from linux-mips.org to build my initial cross compile x86->mips tool chain and root file system. I'm now building most of the software separately (kernel, busybox, hostap, wireless-tools, wavemon, pcmcia-cs, etc) since I've found it to be more flexible. So to answer your question, buildroot made the device files for me. You could easily create them though using mknod: mknod /dev/mtdblock0 b 31 0 mknod /dev/mtdblock1 b 31 1 mknod /dev/mtdblock2 b 31 2 mknod /dev/mtdblock3 b 31 3 You could do the same for the mtd0-3 devices, although I don't have use for them myself. They are major 90, minor 0, 2, 4, 6 for mtd0,1,2,3 respectively. Another note concerning the MTD stuff. It did not work for me until I enabled some chip drivers in the RAM/ROM/Flash chip drivers section, specifically: <*> Detect flash chips by Common Flash Interface (CFI) probe <*> Support for AMD/Fujitsu flash chips Some additional options I have enabled in the MTD section: [*] MTD partitioning support <*> MTD concatenating support (I think this is might be needed for the case where you enable both user and boot chips, but I wouldn't be surprised if I'm wrong about that) <*> Caching block device access to MTD devices Once I had that enabled I now see the "user FS", "kernel", "yamon" MTD partitions in the kernel dmesg output. > Uli > > I am now building a compressed kernel (using some patches I found from Pete Popov in a mailing list archive here: http://www.spinics.net/lists/mips/msg18196.html) and have successfully flashed and booted it by copying it to the correct mtdblock device. I've also got jffs2 working on the User FS partition, but I get a whole bunch of errors when it boots (regardless it still seems to function). I'll post these in another thread if I can't get it resolved. Best regards, Josh Green
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