Need advise with u-boot on SH-7785LCR

[Simon Glass]

+Marek Vasut <marex at denx.de>
+Vagrant Cascadian <vagrant at debian.org>


On Mon, 6 Nov 2023 at 10:33, John Paul Adrian Glaubitz <
glaubitz at physik.fu-berlin.de> wrote:

> 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
> : :' :  Debian Developer
> `. `'   Physicist
>   `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913
>