Re: [Yaffs] Problems with mkyaffs2image.c v1.5

Stanley

A clarification...

I said modifying mkyaffs2, not mkyaffs2image. But, egg on my face, there is no
such thing as mkyaffs2 though there is a tool for yaffs1 called mkyaffs.
http://www.yaffs.net/gitweb?p=yaffs/.git;a=blob;f=utils/mkyaffs.c

mkyaffs runs on the target to "format" a partition (ie erase it) and writes in
an optional image.

This is pretty much equivalent to doing
flash_eraseall
nandwrite optional image.

If we had a mkyaffs2 then we would not rely on mtd incorporating the patch
into nandwrite.

Regards

Charles


On Thursday 22 April 2010 18:48:48 stanley.miao wrote:
> Charles Manning wrote:
> > Hi Stanley
> >
> > I guess the other approach is to not modify nand_write but rather modify
> > mkyaffs2 and use that to write in the image.
>
> We usually run mkyaffs2 on the host PC, and it can't get the nand flash
> information
> on the target board.
>
> Stanley.
>
> > -- Charles
> >
> > On Thursday 22 April 2010 15:15:38 stanley.miao wrote:
> >> Charles Manning wrote:
> >>> We should put this in an FAQ...
> >>>
> >>> On Tuesday 20 April 2010 11:43:52 Guy Lancaster wrote:
> >>>> I built a file system image using mkyaffs2image v1.5 but but won't
> >>>
> >>> mkyaffsimage (the yaffs1 version) worked reasonably well because yaffs1
> >>> tends/tended to be used with a single straight-forward flash format.
> >>>
> >>> With yaffs2, the actual binary layout is defered to the flash driver
> >>> (mtd in the case of Linux). This varies from device to device.
> >>>
> >>> As a result, the current mkyaffs2image is really a bit of a mess and
> >>> needs to be whittled and sandpapered to fit with your flash.
> >>
> >> Yes, The NAND oob layout varies from device to device, mkyaffs2image
> >> can't know
> >> the layout. So we should leave this job to nandwrite.
> >>
> >> This is the patch for it.
> >>
> >> http://lists.infradead.org/pipermail/linux-mtd/2010-February/028923.html
> >>
> >>
> >> Stanley.
>
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