[PATCH 1/2] usb: dwc3-generic: allow fallback of dr_mode property to "otg"

[Marek Vasut]

On 12/16/25 8:45 PM, Kaustabh Chakraborty wrote:
> On 2025-12-16 11:13, Marek Vasut wrote:
>> On 10/17/25 5:30 PM, Kaustabh Chakraborty wrote:
>>> Documentation [1] states that the default value of the dr_mode property
>>> is "otg". In this driver however, this case is not handled. Add simple
>>> logic to fall back to USB_DR_MODE_OTG if its reported to be
>>> USB_DR_MODE_UNKNOWN.
>>>
>>> Link: https://elixir.bootlin.com/u-boot/v2025.10/source/dts/upstream/Bindings/usb/usb-drd.yaml#L23 [1]
>>> Signed-off-by: Kaustabh Chakraborty <kauschluss at disroot.org>
>> How does the driver end up with "unknown" state in the first place ? What is triggering this problem ? (this should be in the commit message)
> 
> When dr_mode is not defined in the device tree node.
> It isn't marked as a mandatory node, and defaults to OTG. That's the
> reason in the commit.
> 
> I will add this info in the commit message then.

Understood, thank you for the clarification.

+CC Ilias, I think Jerome was also syncing DWC3 recently ?