[Buildroot] can't open /dev/ttyO2: No such file or directory

Belisko Marek marek.belisko at gmail.com
Tue Oct 16 19:39:16 UTC 2012


Hi Yegor,

On Tue, Oct 16, 2012 at 12:22 AM, Yegor Yefremov
<yegorslists at googlemail.com> wrote:
> On Tue, Oct 16, 2012 at 12:03 AM, Belisko Marek <marek.belisko at gmail.com> wrote:
>> Hi,
>>
>> this is not mainly related to BR bt maybe somebody facing same problems.
>> I have rootfs builded by BR (just busybox with external toolchain for
>> Cortex-A9).
>> I'm booting kernel 3.7-rc1 on pandaboard with devicetree on barebox.
>> Booting seems to be
>> fine till point when IMO getty is started. Then I get console full of :
>> can't open /dev/ttyO2: No such file or directory
>>
>> Last messages snip:
>> [    2.023406]  mmcblk0: p1 p2
>> [    2.036499] ThumbEE CPU extension supported.
>> [    2.066894] clock: disabling unused clocks to save power
>> [    2.076354] VANA: disabling
>> [    2.079986] VDAC: disabling
>> [    2.086822] omap_hsmmc 480d5000.mmc: Failed to get debounce clk
>> [    2.093231] omap-dma-engine omap-dma-engine: allocating channel for 60
>> [    2.100097] omap-dma-engine omap-dma-engine: allocating channel for 59
>> [    2.107269] omap-dma-engine omap-dma-engine: freeing channel for 59
>> [    2.114349] omap-dma-engine omap-dma-engine: freeing channel for 60
>> [    2.121093] platform 480d5000.mmc: Driver omap_hsmmc requests probe deferral
>> [    2.128814] twl_rtc rtc.9: setting system clock to 2000-01-01
>> 00:00:00 UTC (946684800)
>> [    2.219604] EXT3-fs (mmcblk0p2): error: couldn't mount because of
>> unsupported optional features (240)
>> [    2.375122] EXT2-fs (mmcblk0p2): error: couldn't mount because of
>> unsupported optional features (240)
>> [    2.612854] EXT4-fs (mmcblk0p2): mounted filesystem with ordered
>> data mode. Opts: (null)
>> [    2.621765] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
>> [    2.629394] Freeing init memory: 320K
>> [    2.808105] EXT4-fs (mmcblk0p2): re-mounted. Opts: data=ordered
>> Starting logging :OK
>> Initializing random number generator... done.
>> Starting network...
>> can't open /dev/ttyO2: No such file or directory
>> can't open /dev/ttyO2: No such file or directory
>> can't open /dev/ttyO2: No such file or directory
>>
>> Any ideas?
>>
>> Thanks,
>>
>> mbe
>>
>>
>> --
>> as simple and primitive as possible
>> -------------------------------------------------
>> Marek Belisko - OPEN-NANDRA
>> Freelance Developer
>>
>> Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
>> Tel: +421 915 052 184
>> skype: marekwhite
>> twitter: #opennandra
>> web: http://open-nandra.com
>> _______________________________________________
>> buildroot mailing list
>> buildroot at busybox.net
>> http://lists.busybox.net/mailman/listinfo/buildroot
>
> have you activated devtmpfs in kernel?
That was the problem. When compile devtmpfs to kernel it work fine.
Thanks a lot. I'm asking myself why this isn;t enabled by default in
omap2plus_defconfig?
>
> Yegor

Cheers,

marek

-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
twitter: #opennandra
web: http://open-nandra.com



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