From: Tolunay Orkun <listmember@orkun.us>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] CFI driver does not verify writes in buffered mode - feature?
Date: Wed, 09 May 2007 22:40:14 -0500 [thread overview]
Message-ID: <4642941E.7080007@orkun.us> (raw)
In-Reply-To: <20070509223319.4CF4935264E@atlas.denx.de>
Wolfgang Denk wrote:
> In message <46422E3E.40703@orkun.us> you wrote:
>>> when using the CFI flash driver with CFG_FLASH_USE_BUFFER_WRITE the
>>> "usual" verification whether the write did indeed happen correctly is
>>> not done:
> ...
>> In the above example you are overwriting the same data. Which is OK to
>> write without erasing first. You can turn 1 bits to 0 or re-write the
>> same data without erasing which is OK. The redundant environment
>> implementation takes advantage of this in U-Boot. This is not an error.
>>
>> Am I missing something?
>
> Yes, you do. Detlev wrote different data, and it was not discovered by
> the CFI driver. Using one of the propriatary flash drivers like on the
> TQM8xxL will complain...
Yes, in that case we need to fix this! Detlev, do you have a patch
suggestion?
Tolunay
next prev parent reply other threads:[~2007-05-10 3:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-09 16:32 [U-Boot-Users] CFI driver does not verify writes in buffered mode - feature? Detlev Zundel
2007-05-09 20:25 ` Tolunay Orkun
2007-05-09 22:33 ` Wolfgang Denk
2007-05-10 3:40 ` Tolunay Orkun [this message]
2007-05-10 6:53 ` Detlev Zundel
2007-05-14 3:05 ` Tolunay Orkun
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