Need advise with u-boot on SH-7785LCR

[John Paul Adrian Glaubitz]

Hi Simon!

On Mon, 2023-11-06 at 10:24 -0700, Simon Glass wrote:
> > So, I assume, I should just be able to write u-boot.bin to /dev/mtdblock0?
> 
> Maybe, but you will likely brick the device if you have no other way
> to write to flash.

The flash memory is actually on a daughter board that can be easily replaced
and I have multiple of these daughter boards. It turns out that just writing
the image to /dev/mtdblock0 works and I can boot the board into the freshly
flashed u-boot version.

However, the u-boot version 2019.01 built from git won't work while the old
2014.01 version that I copied onto disk from /dev/mtdblock0 does work when
flashing it to a second daughter board.

So, flashing works indeed like this and I can successfully start u-boot after
flashing it into /dev/mtdblock0. Now I just need to figure out what the difference
between 2014.01 and 2019.01 is and why the latter doesn't work.

I have uploaded both versions here:

> https://people.debian.org/~glaubitz/u-boot-sh7785lcr/

Maybe someone with more experience can spot anything obvious like incorrect
address offsets etc.

PS: I'm actually called Adrian, despite the long name ;-).

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
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