MMC not working reliably for Gumstix Overo Tide

MMC not working reliably for Gumstix Overo Tide

[Andre Puschmann]

Hi list,

I've got a Gumstix Overo Tide (OMAP 3530) based board here which doesn't
have NAND and therefore needs the MMC to boot.

I've successfully built a kernel using Tony's master branch. The system
boots fine up to the point where the MMC driver loads (well, I guess
that is where the problem lies). I am using omap2plus_defconfig. The
weird thing is that sometimes the system hangs after printing "Waiting
for root device /dev/mmcblk0p2..." and sometimes after mounting the
rootfs. Any ideas? I've seen some probelms with MMC in the recent past,
could that be the cause?

Thanks in advance.

Cheers,
Andre



Kernel log:

[    2.092224] Waiting for root device /dev/mmcblk0p2...
[    2.271026] mmc0: host does not support reading read-only switch.
assuming write-enable.
[    2.282379] mmc0: new high speed SDHC card at address b368
[    2.292053] mmcblk0: mmc0:b368 USD   14.9 GiB
[    2.303894]  mmcblk0: p1 p2
[    2.341644] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data
mode. Opts: (null)
[    2.350891] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[    2.358917] Freeing init memory: 208K
 .. nothing happens here ..

Re: MMC not working reliably for Gumstix Overo Tide

[Felipe Contreras]

On Sat, Dec 10, 2011 at 2:45 AM, Andre Puschmann
<andre.puschmann@tu-ilmenau.de> wrote:
> I've got a Gumstix Overo Tide (OMAP 3530) based board here which doesn't
> have NAND and therefore needs the MMC to boot.
>
> I've successfully built a kernel using Tony's master branch. The system
> boots fine up to the point where the MMC driver loads (well, I guess
> that is where the problem lies). I am using omap2plus_defconfig. The
> weird thing is that sometimes the system hangs after printing "Waiting
> for root device /dev/mmcblk0p2..." and sometimes after mounting the
> rootfs. Any ideas? I've seen some probelms with MMC in the recent past,
> could that be the cause?

Have you tried this in the command line? rootwait rootdelay=1

-- 
Felipe Contreras

Re: MMC not working reliably for Gumstix Overo Tide

[Andre Puschmann]

On 12/10/2011 02:24 AM, Felipe Contreras wrote:
> On Sat, Dec 10, 2011 at 2:45 AM, Andre Puschmann
> <andre.puschmann@tu-ilmenau.de> wrote:
>> I've got a Gumstix Overo Tide (OMAP 3530) based board here which doesn't
>> have NAND and therefore needs the MMC to boot.
>>
>> I've successfully built a kernel using Tony's master branch. The system
>> boots fine up to the point where the MMC driver loads (well, I guess
>> that is where the problem lies). I am using omap2plus_defconfig. The
>> weird thing is that sometimes the system hangs after printing "Waiting
>> for root device /dev/mmcblk0p2..." and sometimes after mounting the
>> rootfs. Any ideas? I've seen some probelms with MMC in the recent past,
>> could that be the cause?
> 
> Have you tried this in the command line? rootwait rootdelay=1

Jup, doesn't help, unfortunately.

-Andre