Re: serial: usb: cdc-acm: OMRON B5L ToF, device probe failed

[Chris Ruehl <chris.ruehl@gtsys.com.hk>]

On 23/6/2022 4:44 pm, Chris Ruehl wrote:
>
> On 23/6/2022 4:28 pm, Oliver Neukum wrote:
>>
>> On 23.06.22 04:26, Chris Ruehl wrote:
>>
>> Hi,
>>
>>> thanks for that patch, I can confirm it works for me. I have the ToF up
>>> and running at B921600 8N1.
>>> But I would wait, not apply to the kernel, because I noticed that the
>>> team from OMRON is working
>>> on the CDC implantation.
>>> So this patch is only a workaround for the moment.
>>>
>> if you absolutely want it to be driven from CDC-ACM, try this
>> new attached patch.
>> In your original patch you used NO_UNION_NORMAL. That will allow
>> a device to work without a union descriptor but with the normal
>> two interfaces. This devices has what in terms of ACM is a collapsed
>> interface without a union descriptor.
>> The driver provides for that but then it checks for the exact
>> number of required endpoints, which is three. Your device has
>> four endpoints.
>> The patch ignores a fourth endpoint.
>>
>>     Regards
>>         Oliver
>
> Oliver,
>
> I give this patch a try and report how it works.
>
> Thanks
> Chris
>
Apply the patch ,
still no /dev/ttyACM0 comes up.

Thanks for your effort.
Chris