On Mon, Jun 03, 2024, Jung Daehwan wrote: > > This issue is not specific on SoC side but dwc3 controller. I think it's > better to add it to dwc3 directly but I can't find dts for dwc3. Dts for > SoC, which uses dwc3 would be needed in this case, right? > This quirk applies across different DWC_usb3x versions. IMO, you can just pass the xhci quirk flag along the dwc3_xhci_plat_quirk->quirks without needing to introduce a new xhci DTS binding. However, to do this, you should extract the xhci quirk flags to a separate header so that dwc3 can include and use them. BR, Thinh