Re: [PATCH 2/5] mtd: block2mtd: Add support for specifying MTD write size and subpage shift

Pali Rohár
2017-07-17T12:34:30Z

On Sunday 18 June 2017 12:11:40 Richard Weinberger wrote:
> Pavel,
>
> Am 18.06.2017 um 12:06 schrieb Pavel Machek:
> > Hi!
> >
> >>>>>> Am 02.06.2017 um 17:43 schrieb Pali Rohár:
> >>>>>>> It is needed for creating emulated devices suitable for using in UBI layer
> >>>>>>> and with UBIFS.
> >>>>>>
> >>>>>> Why?
> >>>>>
> >>>>> ubifs depends on write size of nand. And without those parameters as
> >>>>> specified in cover letter I'm unable to mount N900 rootfs image exported
> >>>>> via block2mtd. ubifs reject such image.
> >>>>
> >>>> Hmm, so you render block2mtd into a semi-NAND chip? :)
> >>>
> >>> Probably you can call it like that. But it is still MTD device...
> >>
> >> This is what I meant in my other mail.
> >> You add NAND specific properties but still denote it as MTD_RAM/ROM.
> >> I'm not sure whether this is a good idea.
> >
> > Can you suggest any other way for Pali to mount rootfs image on his
> > PC?
>
> Are you my micro manager? ;-)
>
> As stated in my other mail, we have nandsim and there is work going on
> to allow specifying arbitrary NAND sizes.
> An alternative approach can be found here:
> https://lkml.org/lkml/2016/5/12/296
>
> Thanks,
> //richard

Back to the this patch series. There are also other patches in this
series. If you at least comment/review other patches if this one is
"problematic"?

--
Pali Rohár
pali.rohar@gmail.com