Re: [PATCH 0/5] collected fallout of porting an ATSAMA5D27 based board

[Benedikt Spranger <b.spranger@linutronix.de>]

On Fri, 18 Oct 2024 15:11:20 +0200
Alexander Dahl <ada@thorsis.com> wrote:

Hello Alexander,

> Am Fri, Oct 18, 2024 at 10:30:00AM +0200 schrieb Benedikt Spranger:
> > OK, you might say the nand_atmel NAND driver is obsolete, but it
> > was the only solution to get booting from NAND running. The new DM
> > based NAND driver refused to do anything usefull, so I dropped it
> > after spending a couple of days debugging it:
> 
> Strange.  I have at least three different boards with SAMA5D27
> successfully booting from NAND flash with the new DM based driver
> (unfortunately none of them upstreamed, which also won't change in the
> foreseeable future, sorry).
OK.
 
> Do you use at91bootstrap as 2nd level bootloader like me or something
> else?
I use the U-Boot SPL. There is no UBI support in at91boostrap. There
were some attemps, but...
No interest at the at91bootstrap side.

> For me it was basically getting the dts for U-Boot correct, but
> I got that running with all U-Boot releases since 2023.04 up to
> 2024.10.  Could you share some more detail?
I face all the trouble in SPL. And since the SPL is the essential part
here (UBI support) I gave up at one point. I simply couldn't any
usefull read data from the NAND flash, but all 0.

Regards
    Benedikt Spranger