Re: Unale to get MTD device info

[Radha Mohan <radhamohan_ch@yahoo.com>]

Hi,

Create char mtd devices

mknod /dev/mtd0 c 90 0
mknod /dev/mtd1 c 90 2
..
..
Note that the minor number increments by 2.
Before that you will need to confirm whether CONFIG_MTD_CHAR is set in your kernel or not. This will enable char device access
to your mtdblock device. Or else you will not be able to write to mtd0 char device.

You can erase and copy anything to the mtd devices. You can use "flashcp" from the mtd-utils. Else you can write your own code to write to
the flash. You can take help of the flashcp code in mtd-utils. 

-- Mohan

________________________________
From: Rahanesh <rahanesh@tataelxsi.co.in>
To: Radha Mohan <radhamohan_ch@yahoo.com>
Cc: linux-mtd@lists.infradead.org
Sent: Monday, 24 August, 2009 12:35:42 PM
Subject: Re: Unale to  get MTD device info

Hi Radha Mohan ,

Thanks a lot for responding.

I have few doubts regarding your reply.

In the /dev/ partition of Linux i cannot see any mtd char device. Only 
mtdblock is there.

Can i convert the block devices to character devices? if so how?

Is it possible for me to erase mtdblock0 and copy to mtdblock0 using any 
other utilities?

I am a newbie to all this. Please give your valuable suggestions

Thanks
Rahanesh


Radha Mohan wrote:
> hi rahanesh,
>
> The mtd-utils do not work on block devices like mtdblock0. Use mtd0 
> instead. The mtd0 is char device of mtdblock0.
>
> -- Mohan
>
> ------------------------------------------------------------------------
> *From:* Rahanesh <rahanesh@tataelxsi.co.in>
> *To:* linux-mtd@lists.infradead.org
> *Sent:* Monday, 24 August, 2009 10:53:06 AM
> *Subject:* Unale to get MTD device info
>
> Hi all,
>
> I have four mtdblocks in my flash .
> mtdblock0 -> Primary bootloader
> mtdblock1 -> uboot
> mtdblock2 -> JFFS
> mtdbloack3-> config
>
> During Linux booting , it mounts mtdblock2 to a temp folder which can 
> be seen as a part of ramdisk(root file system of linux)
>
> Now from Linux i need to flash a new jffs image to mtdblock2 itself.
>
> With the support from this mailing list i have copied mtd-utilities 
> package into Linux. Now i have flash_eraseall and flash_cp commands.
>
> But when i run flash_eraseall  i gett the following error
>
>
> flash_eraseall: /dev/mtdblock1: *unable to get MTD device info
>
> *Please help on this!!!!!!!
>
> Thanks
> Rahanesh
>
>
>
>
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