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

Yegor Yefremov yegorslists at googlemail.com
Mon Oct 15 22:22:14 UTC 2012


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
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have you activated devtmpfs in kernel?

Yegor


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