linux-kernel - Re: [RESEND PATCH 1/3] mtd: nand: Add an option to maximize the ECC strength

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Date:	Fri, 10 Jun 2016 09:04:41 -0500
From:	Rob Herring <robh@...nel.org>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	linux-mtd@...ts.infradead.org, Richard Weinberger <richard@....at>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH 1/3] mtd: nand: Add an option to maximize the ECC
 strength

On Wed, Jun 08, 2016 at 05:04:22PM +0200, Boris Brezillon wrote:
> The generic NAND DT bindings allows one to tweak the ECC strength and
> step size to their need. It can be used to lower the ECC strength to
> match a bootloader/firmware config, but might also be used to get a better
> reliability.
> 
> In the latter case, the user might want to use the maximum ECC strength
> without having to explicitly calculate the exact value (this value not
> only depends on the OOB size, but also on the NAND controller, and can
> be tricky to extract).
> 
> Add a generic 'nand-ecc-maximize' DT property and the associated
> NAND_ECC_MAXIMIZE flag, to let ECC controller drivers select the best
> ECC strength and step-size on their own.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> ---
>  Documentation/devicetree/bindings/mtd/nand.txt | 9 +++++++++

Acked-by: Rob Herring <robh@...nel.org>

>  drivers/mtd/nand/nand_base.c                   | 3 +++
>  include/linux/mtd/nand.h                       | 1 +
>  3 files changed, 13 insertions(+)