Hello,
I've got an AT91RM9200, running 2.6.20. I'd like to be able to do
something like:
% dd if=myfile.dat of=/dev/mtdblock/2
which is an Atmel dataflash on SPI. I get 'operation not permitted'.
The device file is marked as writable, and I removed the mask bit that
says the device isn't writable. But I still get operation not
permitted. at91_dataflash_write is linked into the kernel, but
something is preventing the write(). I'm going to delve down into the
kernel to see what I can discover, but I'm wondering if anyone can
tell me now if this isn't going to work at all.
Thank you in advance,
Regards,
Matt Gessner
P.S. I recently found the place in the kernel that checks to see if
the starting address is aligned with the erase size of the part.
Well, it's not. However, u-boot doesn't have that particular
restriction, and I'm wondering if I can get around what the kernel's
drivers are doing. I have a one-time operation I have to do with
something (rewrite the u-boot environment from linux) and if I didn't
have to rewrite all of u-boot, that'd be great too.
Thanks in advance,
Matt
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