Flash Mapping and gpio

[Fundu]

> 
> you shouldnt go mucking about in common code.  this is what
> flash
> mapping drivers are for.
> 
> ive already written a generic gpio one to do exactly what
> you want
> (but it's only been tested on nommu/Blackfin so far):
> http://blackfin.uclinux.org/git/?p=readonly-mirrors/linux-kernel.git;a=blob_plain;f=drivers/mtd/maps/gpio-addr-flash.c;hb=HEAD

these are on 2.6 kernel. i'm using 2.4.20.