From: Andrea Scian <rnd4@dave-tech.it>
To: linux-mtd@lists.infradead.org, Han Xu <b45815@freescale.com>
Cc: shijie8@gmail.com, dwmw2@infradead.org,
computersforpeace@gmail.com, boris.brezillon@free-electrons.com,
fabio.estevam@freescale.com, hofrat@osadl.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/6] mtd: nand: gpmi: correct bitflip for erased NAND page
Date: Wed, 29 Jul 2015 10:05:38 +0200 [thread overview]
Message-ID: <55B88952.1060709@dave-tech.it> (raw)
In-Reply-To: <1438105841-22314-1-git-send-email-b45815@freescale.com>
Dear Han Xu,
Il 28/07/2015 19:50, Han Xu ha scritto:
> i.MX6QP and i.MX7D BCH module integrated a new feature to detect the
> bitflip number for erased NAND page. So for these two platform, set the
> erase threshold to gf/2 and if bitflip detected, GPMI driver will
> correct the data to all 0xFF.
That's an iteresting feature of iMX6QP
We were discussing about erased NAND page bitflip in MTD ML a few days ago.
Is gf/2 a right value to choose? Why?
IIUC, in a previuos MTD-level patch [1] Brian used ECC strength as
threshold.
Could you please also share with which NAND device you tested this patch?
Kind regards and TIA,
--
Andrea SCIAN
DAVE Embedded Systems
[1] http://article.gmane.org/gmane.linux.drivers.mtd/52216
next prev parent reply other threads:[~2015-07-29 8:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.4028.1438106338.1758.linux-mtd@lists.infradead.org>
[not found] ` <mailman.4028.1438106338.1758.linux-mtd.{c3fbf4b6-bd46-4f1f-ba46-40c78864ddc3}.0@lists.infradead.org>
2015-07-28 17:50 ` [PATCH 5/6] mtd: nand: gpmi: correct bitflip for erased NAND page Han Xu
2015-07-29 8:05 ` Andrea Scian [this message]
2015-07-29 14:34 ` Han Xu
2015-07-29 16:01 ` Andrea Scian
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