Mtd block access (jffs2 formatted) and mtd char access(unformatted) on different partitions of a single flashdevice

John Burch jburch at vincisystems.com
Wed May 21 09:49:30 EDT 2003


> > > Also, does the mtd driver for AMD CFI devices handle
> > > AMD's ability to support erasure of multiple sectors 
> simultaneously?
> > 
> > Probably not yet, but there's no reason why it shouldn't. 
> Criticism in 
> > 'diff -u' form is preferred :)
> > 
> 
> Is this chip-feature "probable"? We used to do simutaneous 
> erases in a bootloader, but after a while we started using 
> chips that couldn't do that so we had to change the behaviour 
> to be able to handle all sorts of chips. I'm not sure if CFI 
> covers that particular feature, but it would be great if it 
> did. It wouldn't be so great to have to check JEDEC IDs...
> 

As far as I know, the feature is unique to AMD though I don't know if it
is supported across their entire product line.  Also, it is not a CFI
specific feature.  For example, it's discussed in the 29LV008B (not a
CFI compliant device) data sheet under the "Sector Erase Command
Sequence" section.





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