From: Orjan Friberg <of@flatfrog.com>
To: Matthieu CASTET <matthieu.castet@parrot.com>
Cc: "linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
Grazvydas Ignotas <notasas@gmail.com>
Subject: Re: Spurious ECC errors with mtd_subpagetest (OMAP3, NAND)
Date: Mon, 5 Mar 2012 10:09:44 +0100 [thread overview]
Message-ID: <4F5482D8.4040901@flatfrog.com> (raw)
In-Reply-To: <4F547FBE.4030805@parrot.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: Orjan Friberg <of@flatfrog.com>
To: Matthieu CASTET <matthieu.castet@parrot.com>
Cc: Grazvydas Ignotas <notasas@gmail.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>
Subject: Re: Spurious ECC errors with mtd_subpagetest (OMAP3, NAND)
Date: Mon, 5 Mar 2012 10:09:44 +0100 [thread overview]
Message-ID: <4F5482D8.4040901@flatfrog.com> (raw)
In-Reply-To: <4F547FBE.4030805@parrot.com>
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
next prev parent reply other threads:[~2012-03-05 9:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-02 16:17 Spurious ECC errors with mtd_subpagetest (OMAP3, NAND) Orjan Friberg
2012-03-02 16:17 ` Orjan Friberg
2012-03-02 16:42 ` Orjan Friberg
2012-03-02 17:17 ` Grazvydas Ignotas
2012-03-02 17:17 ` Grazvydas Ignotas
2012-03-05 8:13 ` Orjan Friberg
2012-03-05 8:56 ` Matthieu CASTET
2012-03-05 8:56 ` Matthieu CASTET
2012-03-05 9:09 ` Orjan Friberg [this message]
2012-03-05 9:09 ` Orjan Friberg
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