Re: [PATCH V3 1/3] mtd: add new fields to nand_flash_dev{}

Artem Bityutskiy
2013-03-04T08:23:36Z

On Mon, 2013-03-04 at 16:08 +0800, Huang Shijie wrote:
> 于 2013年03月04日 15:50, Artem Bityutskiy 写道:
> > On Mon, 2013-03-04 at 13:57 +0800, Huang Shijie wrote:
> >> The current code uses the @id to store the device id(byte 1).
> >> But if we use the 8 bytes id data as the keyword, and expand the @id
> >> field to 8byte array,
> >> the device id is the second byte now. All the added zeros are for the
> > I do not think you need to store the full array of ID's. Device ID's for
> > all the 4 of above chips are different, which is enough to distinguish
> > between them.
> >
> > The only thing you need to add is the OOB size field to 'struct
> > nand_flash_dev'.
> >
> If i only add the oob size field. There will be two items with the same
> Device ID in nand_flash_ids table,
> one has oob_size, one does not have. such as:
>
> {"NAND 8GIB 3,3V 8-bit", 0xDE, 0, 8192, 0, LP_OPTIONS},

Do you know what is this chip?

> {"NAND 8GIB 3,3V 8-bit", 0xDE, 0, 8192, 0, LP_OPTIONS, 640}, //OOB
> size is 640

So there are really 2 different chips with the same device id and
different OOB size? If you had 2 datasheets for me demonstrating this,
I'd be grateful.

--
Best Regards,
Artem Bityutskiy