region_info_user and otp_info

[Anand Patil]

Josh,
           I got a AMD NOR Flash AM29LV256M,
           It supports a feature called as Secured Silicon Sector (i.e. a 
256 byte region which can be programmed only once)
           To access the above feature a particular command sequence has to 
be issued
            How can I  know whether the above feature is already 
incorporated in the MTD release OR
            else we need to support it at the driver layer?


Warm Regards,
Anand Patil
----- Original Message ----- 
From: "Josh Boyer" <jwboyer at linux.vnet.ibm.com>
To: "Anand Patil" <anandpatil at ti.com>
Cc: <linux-mtd at lists.infradead.org>
Sent: Tuesday, November 07, 2006 5:15 PM
Subject: Re: region_info_user and otp_info


> On Tue, 2006-11-07 at 09:20 +0530, Anand Patil wrote:
>> Hi,
>>        I am new bee to MTD user land,
>>
>>       1)  Iam not getting what region information refers to in MTD?
>
> Some chips have multiple erase regions.  These regions can have
> eraseblocks of different size than the rest of the chip.  That is what
> the structure is reporting.
>
>
>>     2) I did'nt get the purpose of the below strucuture defined and its
>> usage ?
>
> OTP stands for One Time Programmable.  Some chips have an area that is
> only writable once.  It can be used to store serial numbers, or whatever
> you'd like to store as long as you only need to write that information a
> single time.  That is what this structure is referring to.
>
> josh
>
>