[Letux-kernel] error messages on pyra with usb otg port

H. Nikolaus Schaller hns at goldelico.com
Wed Dec 12 17:34:00 CET 2018


Hi,

> Am 12.12.2018 um 12:32 schrieb Andreas Kemnade <andreas at kemnade.info>:
> 
> Hi,
> 
> On Wed, 12 Dec 2018 09:05:00 +0100
> "H. Nikolaus Schaller" <hns at goldelico.com> wrote:
> 
>>> Am 11.12.2018 um 21:58 schrieb Andreas Kemnade <andreas at kemnade.info>:
>>> 
>>> Hi,
>>> 
>>> I got these messages while playing around with the pyra otg port:
>>> 
>>> root at letux:~# rmmod dwc3_omap
>>> [  130.870422] dwc3 4a030000.dwc3: otg: device->idle
>>> [  130.883397] omap-dwc3 4a020000.omap_dwc3: Dropping the link to regulator.37
>>> root at letux:~# modprobe dwc3_omap
>>> [  135.180613] omap-dwc3 4a020000.omap_dwc3: Linked as a consumer to regulator.37
>>> [  135.190475] dwc3 4a030000.dwc3: Failed to get clk 'ref': -2
>>> [  135.199202] OF: graph: no port node found in /ocp/ocp2scp at 4a080000/usb2phy at 4a084000
> 
> Hmm, that message does not appear in your logs. So now the question is why.

Ok, I see.

> At least something to investigate. The clk error is also in your logs,
> so it is harmless.

Well, at least it does not block basic operation.

> Since USB gadget works in uboot, we probably can rule out hw problems.

Ok.

> 
>>> [  135.208664] dwc3 4a030000.dwc3: otg: idle->device
>>> [  135.214376] dwc3 4a030000.dwc3: changing max_speed on rev 5533202a
>>> root at letux:~# [  135.238419] using random self ethernet address
>>> 
>>> 
>>> Are these errors harmless?
>>> dtb file is
>>> => echo ${fdtfile}
>>> omap5-letux-cortex15-v5.1+pyra-v5.1.dtb
>> 
> And you have tested with what?

reading //omap5-letux-cortex15-v5.1+pyra-v5.1.dtb

...

Image Name:   Linux-4.20.0-rc6-letux+

BR,
Nikolaus

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