Spurious ECC errors with mtd_subpagetest (OMAP3, NAND)

Orjan Friberg of at flatfrog.com
Mon Mar 5 04:09:44 EST 2012

On 03/05/2012 09:56 AM, Matthieu CASTET wrote:
> Note that the omap driver is still broken :
> http://article.gmane.org/gmane.linux.drivers.mtd/36079/match=
> We detected this when stressing a board.
> Because all of these bugs in omap driver, I wonder how many people really use
> the mainline version.

Do you know any repo where this is working correctly (linux-omap, or one 
of the vendor trees etc)?

> Also if you use a nand that need 4-bit ECC, you need a better ecc than hamming.
> You can use the bch code (
> http://article.gmane.org/gmane.linux.drivers.mtd/37864/match=omap )

Yes, I've been looking at the BCH 4-bit code (both generic 
implementations and the OMAP GPMC-enabled one) in u-boot and linux.

Orjan Friberg
FlatFrog Laboratories AB

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