Re: Fwd: anyone can help me about nand_get_flash_type
From: Justin P. Mattock
Date: Tue Sep 07 2010 - 09:28:37 EST
On 09/06/2010 11:37 PM, Tony Wan wrote:
Anyone can help me with this problem? even some ideas how to debug and
find the problem? Thank you!
---------- Forwarded message ----------
From: Tony Wan<visual2me@xxxxxxxxx>
Date: Wed, Aug 25, 2010 at 5:36 PM
Subject: anyone can help me about nand_get_flash_type
To: linux-mtd@xxxxxxxxxxxxxxxxxxx
Hi there,
I got an ARM device from Marvell with a NAND rom, running Linux
2.6.22.18. These days I'm working on upgrading the kernel to 2.6.31.8.
After the upgrade, all devices work well except the NAND rom. I found
it's because that the device and manufacturer IDs cannot be retrieved
correctly in nand_get_flash_type. In 2.6.22.18, the IDs can be
retrieved as expected; but in 2.6.31.8, the IDs always be 0, which
leads to an error in nand_scan.
I'm a definitely newbie with MTD, and currently have no idea about the
problem. Except IO_ADDR_R& IO_ADDR_W are remapped to different
addresses, I can't find any differences between the 2 versions from
the system log -- may it be the reason? Anyone can give me some tips
about this problem -- how to fix it or how to debug? Any suggestions
will be appreciated.
--
Best regards,
Tony Wan
in this case if 2.6.22 worked and 2.6.31 is broken Id suggest bisecting
this, since you have a good/bad starting point.
http://linux.yyz.us/git-howto.html
Justin P. Mattock
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