linux-kernel - Re: [PATCH v5 3/3] mtd: add 4 Toshiba nand chips for the full-id case

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Date:	Thu, 14 Mar 2013 22:29:30 -0400
From:	Huang Shijie <shijie8@...il.com>
To:	Brian Norris <computersforpeace@...il.com>
CC:	Huang Shijie <b32955@...escale.com>, dwmw2@...radead.org,
	artem.bityutskiy@...ux.intel.com, linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/3] mtd: add 4 Toshiba nand chips for the full-id
 case

于 2013年03月14日 01:10, Brian Norris 写道:
> On Wed, Mar 13, 2013 at 7:59 PM, Huang Shijie<b32955@...escale.com>  wrote:
>> I have 4 Toshiba nand chips which can not be parsed out by the
>> id data. We can not get the oob size from the id data. So add them
>> as the full-id nand chips in the first of nand_flash_ids.
>>
>> The nand_get_flash_type() scans the full id nands firstly.
>> If a full-id nand matchs, it will not continue to parse other
>> non-full-id nand types, else it will continue to parse the non-full-id nands.
>>
>> Signed-off-by: Huang Shijie<b32955@...escale.com>
>> ---
>>   drivers/mtd/nand/nand_ids.c |   22 ++++++++++++++++++++++
>>   1 files changed, 22 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
>> index 625bc89..38b8cee 100644
>> --- a/drivers/mtd/nand/nand_ids.c
>> +++ b/drivers/mtd/nand/nand_ids.c
>> @@ -10,6 +10,7 @@
>>    */
>>   #include<linux/module.h>
>>   #include<linux/mtd/nand.h>
>> +#include<linux/sizes.h>
>>
>>   #define LP_OPTIONS NAND_SAMSUNG_LP_OPTIONS
>>   #define LP_OPTIONS16 (LP_OPTIONS | NAND_BUSWIDTH_16)
>> @@ -22,6 +23,27 @@
>>    * extended chip ID.
>>    */
>>   struct nand_flash_dev nand_flash_ids[] = {
>> +       /*
>> +        * The full-id nands may share the same Device ID with the non-full-id
>> +        * nands. In order to distinguish the two type nands, we put the
>> +        * full-id nands in the first of the table. So the nand_get_flash_type()
>> +        * scans the full id nands firstly. If a full-id nand matchs, it will
>> +        * not continue to parse other non-full-id nand types, else it will
>> +        * continue to parse the non-full-id nands.
>> +        */
> There are a few grammar/language issues (nands ->  NAND chips, id ->
> ID, firstly ->  first). Also, I don't think you need to explain the
> full search here. I would rewrite this whole paragraph as:
>
sorry for my poor english.

> "Some incompatible NAND chips share device ID's and so must be listed
> by full ID. We list them first so that we can easily identify the most
> specific match."
>
thanks. I will use this description.



Huang Shijie
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