linux-kernel - Re: [PATCH 1/4] mtd: add a new field to mtd

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Date:	Wed, 15 May 2013 15:59:16 +0800
From:	Huang Shijie <b32955@...escale.com>
To:	<dedekind1@...il.com>
CC:	<dwmw2@...radead.org>, <computersforpeace@...il.com>,
	<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] mtd: add a new field to mtd_info{}

于 2013年05月15日 15:47, Artem Bityutskiy 写道:
> On Fri, 2013-05-03 at 14:21 +0800, Huang Shijie wrote:
>> In order to implement the NAND boot for some Freescale's chips, such as
>> imx23/imx28/imx50/imx6, we use a tool (called kobs-ng) to burn the uboot
>> and some metadata to nand chip. And the ROM code will use the metadata to
>> configrate the BCH, and to find the uboot.
>>
>> The ECC information(ecc step size, ecc strength) which is used to configrate
>> the BCH is part of the metadata. The kobs-ng can gets the ecc strength from
>> the sys node /sys/*/ecc_strength now. But it can not gets the ecc step size.
>>
>> This patch adds a new field to store the ecc step size in mtd_info{}, and
>> it makes preparation for the next patches.
>>
>> Signed-off-by: Huang Shijie<b32955@...escale.com>
>> ---
>>   include/linux/mtd/mtd.h |    3 +++
>>   1 files changed, 3 insertions(+), 0 deletions(-)
>>
>> diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
>> index 183a304..b93035f 100644
>> --- a/include/linux/mtd/mtd.h
>> +++ b/include/linux/mtd/mtd.h
>> @@ -173,6 +173,9 @@ struct mtd_info {
>>   	/* ECC layout structure pointer - read only! */
>>   	struct nand_ecclayout *ecclayout;
>>
>> +	/* the ecc step size. */
>> +	unsigned int ecc_size;
> It would really be nice to harmonize the naming and probably stick to
> ecc_step everywhere. To me things looks confusing, because ecc_size is
> actually ECC step size, and not the size of ECC codes.
>
ok. I will use ecc_step as the name.

thanks
Huang Shijie


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