[flashrom] Re: Erase fails with flashrom using mtd

[Anastasia Klimchuk]

Hello Sakthipriya,

One thing that I thought about, maybe some regions on your chip are
write-protected (which would prevent erase too). As you are saying,
> Chip size is 16MB, Flashrom erases successfully till 6MB and fails then

Maybe the first 6MB are not protected.

WIll you be able to provide verbose logs? To have verbose logs, you
need to add -VV to the command line (or -VVV for even more).
If you will be able to create verbose logs, also look at them yourself
first - maybe there are details of the error that can help you. But
you can also send logs to this thread.

It is possible to specify exact regions of the chip memory to perform
an operation,
see info on manpage https://flashrom.org/classic_cli_manpage.html
relevant options would be:

-l, –layout <file>
–ifd
-i, –include <region>[:<file>]

and check the examples

Also check the docs about write-protection, some of this can be useful
https://flashrom.org/user_docs/example_partial_wp.html
https://flashrom.org/user_docs/fw_updates_vs_spi_wp.html

On Fri, Apr 25, 2025 at 8:35 PM Sakthipriya M via flashrom
 wrote:
> Hi,
>
> Any update on this. We tried using the source from master repo and tried still facing same issue.
>
> Let us know if you need more info on this.
>
> Thanks,
>
> Sakthipriya M
>
> From: Sakthipriya M
> Sent: 15 April 2025 14:26
> To: [e-mail]
> Cc: Manimehalai Selvaraj 
> Subject: Erase fails with flashrom using mtd
>
> Hi,
>
> We are using customised Elkhart lake board, when we tried to update BIOS using flashrom, following error is reported,  “linux_mtd_erase: MEMERASE ioctl call returned -1, error: Input/output error”. But sometimes we could update BIOS successfully. Chip size is 16MB, Flashrom erases successfully till 6MB and fails then
>
> Flashchip: Macronix MX25L12835F
>
> OS: GNU/LINUX
>
> Kernel: Tried in 6.12.5 and 6.14.2.
>
> Ensured that MTD kernel configurations are enabled.
>
> Flash chip is detected as “BIOS” in /dev/mtd0.
>
> Thanks,
>
> Sakthipriya M
>
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