On Wed, Jun 15, 2016 at 10:42:18AM +0200, Boris Brezillon wrote: > Modern NANDs do not guarantee that data written in raw mode will not > contain bitflips just after writing them. This is fine since the number > of bitflips should be rather low and thus fixable by the ECC engine, > but since we are reading data in raw mode to verify if they match the > input data we cannot prevent failures if some bits are flipped. > > The option of using standard mode to verify the data is not acceptable > either, since one of the usage of raw mode is to allow flashing images > that do not respect the standard NAND page layout or the default ECC > config (this is the case on Allwinner platforms, where the ROM code > tests several hardcoded configs, which are not necessarily matching the > NAND characteristics). > > Add an extension to the nand write.raw command allowing one to disable > the verification step. > > Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
Reviewed-by: Tom Rini <tr...@konsulko.com> -- Tom
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