[PATCH v2] mtd: rawnand: nandsim: Add support to disable subpage writes.

[Marc Kleine-Budde]

On 9/24/20 12:28 PM, Richard Weinberger wrote:
>>> This is the way I deal with subpage "issues" when inspecting ubi/ubifs
>>> images on nandsim.
>>
>> One question (rather academic, I don't want to do that): Does the UBI/UBIFS do
>> sub-page writes on the nandsim? Is the resulting NAND image still compatible if
>> I write it to the original device, that doesn't do subpage writes?
> 
> Since nandsim announces subpages, UBI will use them. Except you define your own
> VID header offset.
> UBIFS does not use subpages at all and UBI only for VID headers to be more storage
> efficient.
> 
> So, ubiattach -O should completely fulfill your needs.

\o/

> If all other parameters of the NAND match, and I guess so, otherwise ubiattach
> would notice, the UBI image should also work on the target.
> Modulo fastmap, if you have bad blocks.

Thanks for the explanation!

Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
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