[U-Boot] Enabling nand createbbt command

Scott Wood scottwood at freescale.com
Thu Mar 8 22:08:32 CET 2012

On 03/08/2012 03:01 PM, Bud Miljkovic wrote:
>> -----Original Message-----
>> From: Scott Wood [mailto:scottwood at freescale.com]
>> Sent: Friday, 9 March 2012 9:02 a.m.
>> To: Bud Miljkovic
>> Cc: u-boot at lists.denx.de
>> Subject: Re: [U-Boot] Enabling nand createbbt command
>> It should happen automatically when nand_erase_opts() calls
>> chip->scan_bbt(), provided the driver set the NAND_USE_FLASH_BBT flag,
>> and that NAND_BBT_CREATE/NAND_BBT_WRITE are set in the nand_bbt_descr
>> (this is the case if the driver doesn't override the default
>> nand_bbt_descr).
>> Are you not seeing it happen?  What version of U-Boot are you using,
>> with which NAND controller driver?
> I am using u-boot-2009.08 sources from Freescale released under SABRE
> Automotive Infotainment board aka mx53_ard.

Please use a recent upstream U-Boot, or contact support at freescale.com
for support with your Freescale-supplied code.

> Looking at this from the u-boot commands prospective,
> - I get "nand - NAND sub-system" but it does not recognize "nand
> createbbt" command

Is there a reason you're expecting it to exist?

> I am fairly newbee in this and would not know which NAND controller
> driver is used.

Why are you using the scrub command?  It's an "I know what I'm doing"
backdoor.  There's even a warning, with confirmation prompt, telling you
it's dangerous and to only use it "if you are sure of what you are doing".


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