Good point Stuart. I’ll post this over at the u-boot site and see what that bunch has to say.
Thanks
From: Stuart Hughes [mailto:address@hidden
Sent: Friday, September 02, 2011 4:04 AM
To: Chris Westervelt
Cc: address@hidden
Subject: Re: [Ltib] updating Kernel image in MTD from Linux
Hi Chris,
The first thing to figure out is whether the u-boot util is supposed to be writing a jffs2 image. It seems like it is.
If this is the case, then it's possible that what u-boot is writing is not valid (in this situation). I've seen many a problem with jffs2 when you first mount the image if it's not written exactly right. For example if the thing that created the jffs2 image does not use the correct erase block size and/or if the erase block markers are not written.
I suggest verifying this is supposed to be jffs2 and if so asking on a u-boot list why Linux can't mount this (on an /dev/mtdblock device).
Regards, Stuart
On 01/09/11 21:17, Chris Westervelt wrote:
When you write the bin file with u-boot you use nand write.jffs2 <bin-file>. Whatever that produces is good for u-boot to load into ram for execution but when you try to mount that block in Linux, you get a bunch of problems. In other words, they don’t appear to be compatible. I’m thinking that somehow I need the kernel image already in some sort of JFFS2 image format and do what you said and just write it to /dev/mtdblock4.
From: Stuart Hughes [mailto:address@hidden]
Sent: Thursday, September 01, 2011 3:51 AM
To: Chris Westervelt
Cc: address@hidden
Subject: Re: [Ltib] updating Kernel image in MTD from Linux
Hi Chris,
You need to provide more detail.
If the MTD partition holding the kernel is formatted as jffs2 then you should be able to just mount and then copy across the new kernel image.
If it's a raw partition then I think you can just do 'cp ImageFile /dev/mtdx'
Regards, Stuart
On 31/08/11 18:38, Chris Westervelt wrote:
Has anyone worked out a mechanism that would allow one to re-write the Kernel MTD block with a fresh Kernel from inside linux? If I try to mount this partition jffs2, I get lots of errors and an inevitable mount failure.
Chris Westervelt