Re: Mounting Entire Flash

[Rahanesh <rahanesh@tataelxsi.co.in>]

Hi Dennis,

> On Thu, 2009-09-24 at 15:44 +0530, Rahanesh wrote:
>   
>> Hi All,
>>
>> Currently I have 4 mtd partitions in Flash. They are all seen under /dev 
>> directory as mtd0 mtd1 mtd2 and mtd3.
>>
>> mtd0-> Uboot + Itz Environment
>> mtd1-> JFFS
>> mtd2-> Config files
>> mtd3-> Not used
>>
>> I am currently trying to implement Image upgradation.
>>
>> I will need to update JFFS, uboot and Config files from Linux.
>>
>> I am currently achieving this through  flash_eraseall and dd  command .
>>
>> To Update U-boot First i will do a
>>
>> flash_eraseall /dev/mtd0 and then
>> dd if=uboot.bin of=/dev/mtd0 count=size;
>>
>> and similarly for all individual partitions.
>>
>> But If i have a combined image as combined.bin  how do i update the 
>> entire flash .
>>
>> Is it possible to see entire flash as /dev/mtd  . i can very well 
>> extract individual images from combined image and reflash to respective 
>> partitions.
>>
>> But it would be generic if  we are able write to entire flash not to 
>> individual partitions.
>>
>> Is it possible to Write to entire flash as such.
>>
>> Thanks
>> Rahanesh
>>     
>
> I always set up a partition that spans the entire flash chip.. 
>
> mtd0 -> 0:ENTIRE_SIZE
> mtd1 -> 0:+10M
> mtd2 -> 10M:22M
>   
         How do we achieve this? Should we edit /proc/mtd or 
flash/driver code ?

        Thanks
        Rahanesh