Re: MTD Limitations

Re: MTD Limitations

[Adrian Hunter]

Ashish Pareek wrote:
> Does MTD has Limitations to support Nand Flash <=4GB ? Has this issue is fixed in latest MTD GIT ?

The latest MTD GIT does support 4GB NAND flash, however you will
need to check your particular driver does not have limitations.

Please be aware that the ioctls used by mtd-utils are limited to
32-bit sizes.  That means they do *not* support 4GiB, but they are
probably OK for less than 4GiB i.e. 4GiB minus one eraseblock size.

Re: MTD Limitations

[Adrian Hunter]

Ashish Pareek wrote:
> Hi  Adrian,
> Currently we are using DM355 based Custom board , that will be having 
> another 4k page Nand from Micron (MT29F64G08TAAWP)in parallel with 
> exisitng 2k pg Nand (MT29F16G08FAAWC) . we have 4 diff chip select (2 
> per chip )determined by the CS0 along with 2 address lines using a 
> decoding logic .
> 
> I dont think any support for 4k pg NF is available . How could be the 
> design possible ?

You will have to make the changes to support 4k pg NF yourself.  I do not
have such a device, so I do not know exactly what the requirements are.

> 
> Ashish
> ----- Original Message ----- From: "Adrian Hunter" 
> <ext-adrian.hunter@nokia.com>
> To: "Ashish Pareek" <ashish.pareek@drishyasystems.com>
> Cc: "linux-mtd Mailing List" <linux-mtd@lists.infradead.org>
> Sent: Monday, December 29, 2008 1:27 PM
> Subject: Re: MTD Limitations
> 
> 
>> Ashish Pareek wrote:
>>> Does MTD has Limitations to support Nand Flash <=4GB ? Has this issue 
>>> is fixed in latest MTD GIT ?
>>
>> The latest MTD GIT does support 4GB NAND flash, however you will
>> need to check your particular driver does not have limitations.
>>
>> Please be aware that the ioctls used by mtd-utils are limited to
>> 32-bit sizes.  That means they do *not* support 4GiB, but they are
>> probably OK for less than 4GiB i.e. 4GiB minus one eraseblock size.
>>
>