linux-kernel - Re: [PATCH V3 1/3] mtd: add new fields to nand_flash

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Message-ID: <1362234094.2745.9.camel@sauron>
Date:	Sat, 02 Mar 2013 16:21:34 +0200
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Huang Shijie <shijie8@...il.com>
Cc:	Huang Shijie <b32955@...escale.com>, dwmw2@...radead.org,
	computersforpeace@...il.com, linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 1/3] mtd: add new fields to nand_flash_dev{}

On Sat, 2013-02-16 at 11:56 +0800, Huang Shijie wrote:
> On Tue, Feb 12, 2013 at 11:47 PM, Artem Bityutskiy <dedekind1@...il.com> wrote:
> > On Mon, 2013-01-28 at 12:57 +0800, Huang Shijie wrote:
> >> +       {"SmartMedia 256MiB 3,3V",      {0, 0x71}, 512, 256, 0x4000 },
> >> +       {"SmartMedia 256MiB 3,3V ROM",  {0, 0x5b}, 512, 256, 0x4000,
> >> NAND_ROM},
> >
> > Sorry for a possibly stupid question, but what does it buy you adding
> > another "0" to all the entries? I see you add another table, which you
> > look up if the "traditional" table does not work. Why you need to add
> > these zeroes?
> 
> The zeros are for the maf_id.
> 
> The dev_id is the second byte of the 8-byte id data.

It does not really make me understand why we add these zeroes, they
still look useless to me... Would you please be a little more verbose
about your solution?

-- 
Best Regards,
Artem Bityutskiy

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