[U-Boot] [PATCHv2 CFI flash]: Workaround for Numonyx Axcell P33/P30 256-Mbit 65nm bug

[Wolfgang Denk]

Dear Stefan,

In message <20100623131040.GA23209 at frolo.macqel> Philippe De Muyter wrote:
> Hello Wolfgang & list,
> 
> This is a revised patch, with comments and indentation fixed, I hope.
> 
> I have "ported" U-boot to a in house made board with Numonyx Axcell P33/P30
> 256-Mbit 65nm flash chips.
> 
> After some time :( searching for bugs in our board or soft, we have
> discovered that those chips have a small but annoying bug, documented in
> "Numonyx Axcell P33/P30 256-Mbit Specification Update"
> 
> It states :
> When customer uses [...] block unlock, the block lock status might be
> altered inadvertently. Lock status might be set to either 01h or 03h
> unexpectedly (00h as expected data), which leads to program/erase failure
> on certain blocks.
> 
> A working workaround is given, which I have applied and tested with success.
> 
> Signed-off-by: Philippe De Muyter <phdm at macqel.be>
> 
> ---
>  drivers/mtd/cfi_flash.c |   27 ++++++++++++++++++++-------
>  1 files changed, 20 insertions(+), 7 deletions(-)

I didn't see comments from you?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
There are no data that cannot be plotted on a straight  line  if  the
axis are chosen correctly.