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To: linux-mtd@lists.infradead.org
From: Martin Egholm Nielsen <martin@egholm-nielsen.dk>
Subject: Access to NOR from Linux - what is required?
Date: Tue, 14 Nov 2006 15:36:22 +0100
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Hi,

I know this is a rather vague question, but how do I gain access to the 
NOR flash on my board?

Ok, a little more clarification follows: I have a PPChameleon board from 
which I can access the NOR from U-Boot. However, launching Linux will 
only grant me access to the NAND. For the NAND I see there is a 
"drivers/mtd/nand/ppchameleonevb.c" file responsible for setting up a 
lot of stuff.
However, with my knowledge I looked for a "drivers/mtd/nor" directory, 
as well, to see what others have done for their boards. But this does 
not exist. Hence my question...

Moreover, and again due to my lack of knowledge, another question: I use 
my NAND device with a filesystem (JFFS2/YAFFS), but I guess the NOR does 
not have one (and should not have one since I use it from U-Boot). So if 
I succeed to gain access from Linux to the NOR, I/O operations should be 
performed using "dd" or what?

For those who wonders; I need to replace the Linux kernel in the NOR 
from the running Linux - not from U-Boot...

BR,
  Martin Egholm