[Letux-kernel] X1600 / LX16 support - here: adding MMC

[Andreas Kemnade]

On Fri, 9 Feb 2024 17:02:51 +0100
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:

> Hi Andreas,
> 
> > Am 09.02.2024 um 16:20 schrieb Andreas Kemnade <andreas at kemnade.info>:
> > 
> > Hi Nikolaus,
> > 
> > On Fri, 9 Feb 2024 15:14:11 +0100
> > "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
> >   
> >> Unfortunately we can't look into /sys/kernel/debug...  
> > 
> > well, you can either use an initrd (haven't a nice mips one lying
> > around here, but maybe just an alpine image suffices),  
> 
> Or one of the letux rootfs? http://download.goldelico.com/letux-debian-rootfs/wheezy-mipsel-minimal.tbz
> 
> But I think it is far too big for an initrd (ca. 100 MB).
> 
my alpine arm image is 4.7MB uncompressed combined with scripts
ready to run to produce various things out of it, so I can easily 
just boot it.

> > or configure  
> 
> Yes, that yould work but is probably the same complexity as fixing
> the real bug.
> 
> > one of the slots as gpio and use mmc over spi over gpio.  
> 
> In both cases we disable the mmc initialization we want to analyse.
> To understand why the setup isn't correct.
> 
no, we do not disable it we just have the ability to examine things
from userspace as rootfs does not depend on successful initialisation of
mmc.
I have debugged several other emmc/sd problems on other boards this way.

BTW: how do we boot the board from USB? With tools are needed on host  side?

Regards,
Andreas