Dear Stefan,
In message 20100623131040.GA23209@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@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
Doesn't the Linux kernel need the same fix? Would be great if you(Philippe) could provide one. I too have such chips but I have never seen this problem so I guess I have been lucky so far :)
Jocke