jffs2, intel flash and i.MX21

jffs2, intel flash and i.MX21

[Munira Ahmed]

I am working with i.Mx21 and intel strata nor flash. I wish to use jffs2
and I have got a readymade jffs2 file sytem for nor flash from may be
freescale/motorola. I am told that this file system is supposed to be
mounted by the kernel when it boots up. However it does happen so and
system does not boot at all. Can anybody please tell me what's wrong.

I have enabled mtd, jffs2 and intel flash support with bus size of 32.
The intel flash driver cfi_cmdset_0001.c is also there.

Can anybody please give me a clue 

1)	how can I debug that 
2) 	which part of the kernel should I look into i.e where do I found the
code to mount the jffs2 in the kernel tree
3) what might be missing in the kernel config
4) any other idea?


-- 
Munira Ahmed

Re: jffs2, intel flash and i.MX21

[Konstantin Kletschke]

Am 2005-06-02 19:01 +0800 schrieb Munira Ahmed:

> 1)	how can I debug that 

Tell us what you did, what is happening, what should happening, what
hardware you are using, which bootloader.

> 2) 	which part of the kernel should I look into i.e where do I found the
> code to mount the jffs2 in the kernel tree

Oh my... fs/jffs2 or drivers/mtd.

> 3) what might be missing in the kernel config

Many many things. A mapping driver, or partition support, wrong
commandline, wrong chip driver, modules instead of *'s.

> 4) any other idea?

Many, your provided information is very insufficient.

Regards, Konsti

Re: jffs2, intel flash and i.MX21

[Munira Ahmed]

On Thu, 2005-06-02 at 13:26 +0200, Konstantin Kletschke wrote:
> Am 2005-06-02 19:01 +0800 schrieb Munira Ahmed:
> 
> > 1)	how can I debug that 
> 
> Tell us what you did, what is happening, what should happening, what
> hardware you are using, which bootloader.

I am using an internally designed bootloader. I am using MX21
development board with intel strata flash. I copy bootloader, kernel
image and flash system to the flash and try to reboot the system. system
hangs although the same sequence is running fine with cram file system.
Of course with different kernel configs.



> 
> > 2) 	which part of the kernel should I look into i.e where do I found the
> > code to mount the jffs2 in the kernel tree
> 
> Oh my... fs/jffs2 or drivers/mtd.

	Both or either one. I know generally but I was hoping to be directed to
the specific file.


> > 3) what might be missing in the kernel config
> 
> Many many things. A mapping driver, or partition support, wrong
> commandline, wrong chip driver, modules instead of *'s.

Mapping driver and support for mtd partiion is there. also I am using *
instead of M in the menuconfig

> 
> > 4) any other idea?
> 
> Many, your provided information is very insufficient.
> 
> Regards, Konsti
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
> 
-- 
Munira Ahmed
Senior Embedded Specialist

Radixs Pte Ltd
Email:munira.ahmed@radixs.com


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