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

Andreas Kemnade andreas at kemnade.info
Fri Feb 9 17:49:17 CET 2024

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
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?


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