MTD partitions missing

MTD partitions missing

[garazi juez uriagereka]

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Hello,

I am Garazi and I am
working  in the Electronic Design Group at the University of the
Basque Country.


I'm running the Xilinx git kernel 2.6.31
from git.xilinx.com on a V5 PPC440 CORE( Xilinx ML507). We have a NOR CFI
flash device. 

Flash chip has been particionated according to
this table:
 
  
  
  START ADDRESS


  
  
  OFFSET
  
  
  SIZE


  
  
   
  
 
 
  
  LINUX
  
  
  0xFE000000
  
  
  0x00000000
  
  
  0x00500000 (5M)
  
  
   
  
 
 
  
  JFFS2 Filesystem
  
  
  0xFE500000
  
  
  0x00500000
  
  
  0x01600000 (22M)
  
  
   
  
 
 
  
  UNUSED
  
  
  0xFFB00000
  
  
  0x01B00000
  
  
  0x00114000(4896 K) 
  
  
   
  
 
 
  
  LOADER
  
  
  0xFFFE0000
  
  
  0x01FE0000
  
  
  0x00020000(128K)

In order to get this four partitions, my .dts file has been
configured this way:

bootargs =
"console=ttyS0 ip=on root=/dev/ram rw  
   
   
mtdparts=fe000000.flash:5M(zImage),22M(rootfs),4896k(unused),128k(loader)";

First
of all, linux kernel was booted from Flash, using a ramdisk for the
flash system and a loader , and it worked.

Now, I am trying to
mount JFFS2 file system but I can not. I have tried it in two
different ways:
1. Mounting JFFS2 file system when  the
kernel has already booted.
2. Changing my dts file and mounting JFFS2
automatically when kernel boots.

bootargs =
"console=ttyS0 ip=on root=/dev/mtdblock1 rw  rootfs=jffs2

       
mtdparts=fe000000.flash:5M(zImage),22M(rootfs),4896k(unused),128k(loader)";

 I
guess that the problem is related to MTD driver, because mtd
partitions are not correctly created. I check partition file and just one of four partition appears
(cat  /proc/partitions --> mtdblock0 just
appears).

I have read in the Internet that there are other
people who have had the same problem when they have updated 2.6.28
kernel to 2.6.31 kernel. Although, there is no answer.

I would appreciate any kind of help.

Regards,

Garazi


 		 	   		  
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