When using usb-c connector (but it can also be the case with a micro-b connector), iddig, avalid, bvalid, vbusvalid input signals may not be connected to the DWC2 OTG controller. DWC2 OTG controller features an overriding control of the PHY voltage valid and ID input signals. So, missing signals can be forced using usb role from usb role switch and this override feature. This series adds support for usb role switch to dwc2, by using overriding control of the PHY voltage valid and ID input signals. It has been tested on stm32mp157c-dk2 [1], which has a Type-C connector managed by a Type-C port controller, and connected to USB OTG controller. [1] https://www.st.com/en/evaluation-tools/stm32mp157c-dk2.html Amelie Delaunay (3): usb: dwc2: override PHY input signals with usb role switch support usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs ARM: dts: stm32: enable usb-role-switch on USB OTG on stm32mp15xx-dkx arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 2 +- drivers/usb/dwc2/Kconfig | 1 + drivers/usb/dwc2/Makefile | 2 +- drivers/usb/dwc2/core.h | 8 ++ drivers/usb/dwc2/drd.c | 190 +++++++++++++++++++++++++ drivers/usb/dwc2/gadget.c | 2 +- drivers/usb/dwc2/params.c | 4 +- drivers/usb/dwc2/platform.c | 13 ++ 8 files changed, 218 insertions(+), 4 deletions(-) create mode 100644 drivers/usb/dwc2/drd.c -- 2.17.1
