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From: Hong Xu <hong.xu@atmel.com>
To: dedekind1@gmail.com
Cc: linux-mtd@lists.infradead.org, David.Woodhouse@intel.com,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] MTD: atmel_nand: Update Kconfig to support PMECC
Date: Tue, 13 Dec 2011 09:14:07 +0800	[thread overview]
Message-ID: <4EE6A6DF.4@atmel.com> (raw)
In-Reply-To: <1323723514.2297.8.camel@koala>

Hi David,

On 12/13/2011 04:58 AM, Artem Bityutskiy wrote:
> On Thu, 2011-12-08 at 14:53 +0800, Hong Xu wrote:
>  > +config MTD_NAND_ATMEL_PMECC_HW
>  > + bool "Programmable Hardware ECC (BCH code)"
>  > + depends on ARCH_AT91SAM9X5 || ARCH_AT91SAM9N12
>  > + help
>  > + Use Programmable Hardware ECC (PMECC) controller.
>  > +
>  > + The PMECC Controller is a programmable binary BCH (Bose, Chaudhuri
>  > + and Hocquenghem) encoder/decoder. This controller can be used to
>  > + generate redundancy information for both SLC and MLC NAND Flash
>  > + devices.
>  > +
>  > + NB : hardware and software ECC schemes are incompatible.
>  > + If you switch from one to another, you'll have to erase your
>  > + mtd partition.
>
> Does it have to be a config option, can we avoid adding config options
> uless we really have to?

Agree. The original MTD_NAND_ATMEL_ECC_HW can be reused. In driver, if 
the SoC has PMECC, it'll be used.

Thanks.

BR,
Eric

WARNING: multiple messages have this Message-ID (diff)
From: hong.xu@atmel.com (Hong Xu)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] MTD: atmel_nand: Update Kconfig to support PMECC
Date: Tue, 13 Dec 2011 09:14:07 +0800	[thread overview]
Message-ID: <4EE6A6DF.4@atmel.com> (raw)
In-Reply-To: <1323723514.2297.8.camel@koala>

Hi David,

On 12/13/2011 04:58 AM, Artem Bityutskiy wrote:
> On Thu, 2011-12-08 at 14:53 +0800, Hong Xu wrote:
>  > +config MTD_NAND_ATMEL_PMECC_HW
>  > + bool "Programmable Hardware ECC (BCH code)"
>  > + depends on ARCH_AT91SAM9X5 || ARCH_AT91SAM9N12
>  > + help
>  > + Use Programmable Hardware ECC (PMECC) controller.
>  > +
>  > + The PMECC Controller is a programmable binary BCH (Bose, Chaudhuri
>  > + and Hocquenghem) encoder/decoder. This controller can be used to
>  > + generate redundancy information for both SLC and MLC NAND Flash
>  > + devices.
>  > +
>  > + NB : hardware and software ECC schemes are incompatible.
>  > + If you switch from one to another, you'll have to erase your
>  > + mtd partition.
>
> Does it have to be a config option, can we avoid adding config options
> uless we really have to?

Agree. The original MTD_NAND_ATMEL_ECC_HW can be reused. In driver, if 
the SoC has PMECC, it'll be used.

Thanks.

BR,
Eric

  reply	other threads:[~2011-12-13  1:14 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-08  6:53 [PATCH 1/2] MTD: atmel_nand: Update Kconfig to support PMECC Hong Xu
2011-12-08  6:53 ` Hong Xu
2011-12-08  6:53 ` [PATCH 2/2] MTD: atmel_nand: Update driver code to support Programmable HW ECC controller Hong Xu
2011-12-08  6:53   ` Hong Xu
2011-12-12 20:58 ` [PATCH 1/2] MTD: atmel_nand: Update Kconfig to support PMECC Artem Bityutskiy
2011-12-12 20:58   ` Artem Bityutskiy
2011-12-13  1:14   ` Hong Xu [this message]
2011-12-13  1:14     ` Hong Xu
2011-12-13  1:58     ` Hong Xu
2011-12-13  1:58       ` Hong Xu
2011-12-17 15:33       ` Artem Bityutskiy
2011-12-17 15:33         ` Artem Bityutskiy
2011-12-19  1:58         ` Hong Xu
2011-12-19  1:58           ` Hong Xu

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