On Wed Nov 19, 2025 at 12:21 AM CST, Siddharth Vadapalli wrote:
> On Tue, 2025-11-18 at 15:56 -0600, [email protected] wrote:
>> From: Randolph Sapp <[email protected]>
>> 
>> These rules do not match the current structure of the USB DEVPATH and
>> are not actually fired.
>> 
>> They were initially cited as being help scripts, but I think users
>> should attempt to gracefully bring down the gadget interface on their
>> own instead of relying on a script that will attempt to reload it post
>> mode change.
>> 
>> Signed-off-by: Randolph Sapp <[email protected]>
>
> Additionally, 'configfs' is used for configuring USB Gadget drivers using
> the libcomposite driver. The Gadget Zero 'g_zero' and other USB Gadgets
> should be enabled via 'configfs' as documented at:
> https://docs.kernel.org/usb/gadget_configfs.html
>
> Loading individual Gadget drivers via 'modprobe' is deprecated in favor of
> the above.
>
> Reviewed-by: Siddharth Vadapalli <[email protected]>
>
> Regards,
> Siddharth.

Thanks for the review Siddharth. Could you or someone familiar with the current
USB tooling update the documentation for the DWC3 [1]? I'm not sure if it was
never correctly imported from the processor wiki or what, but it appears there a
sections missing and the content present appears disjointed.

A lot of it can be reduced to links to the upstream DWC3 docs [2] and linked
gadget configfs. At the moment the only thing that even mentions gadget configfs
is the AM62_DWC3 document, and it only does so because of a kconfig code
snippet.

[1] 
https://github.com/TexasInstruments/processor-sdk-doc/blob/master/source/linux/Foundational_Components/Kernel/Kernel_Drivers/USB/DWC3.rst
[2] https://docs.kernel.org/driver-api/usb/dwc3.html


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