Hi all,
I'm trying to get a USB Gadget device working in Linux on the STM32MP257F-DK board to expose a Mass Storage device to another system. I'm trying to use CN15 for this function but I can't get the bound gadget to show up on the other side of the USB connection.
I'm using a fork of github.com/STMicroelectronics/linux?branch=v6.6-stm32mp where I've modified the usb3dr node of the dk.dts file with the following things:
1.
836 &usb3dr {
837 status = "okay";
838
839 dwc3: usb@48300000 {
840 phys = <&usb2_phy2>, <&combophy PHY_TYPE_USB3>;
841 phy-names = "usb2-phy", "usb3-phy";
842 usb-role-switch;
843 dr_mode = "peripheral";
844 port {
845 dwc3_ep: endpoint {
846 remote-endpoint = <&typec_ep>;
847 };
848 };
849 };
850 };
2.
840 - phys = <&usb2_phy2>, <&combophy PHY_TYPE_USB3>;
841 - phy-names = "usb2-phy", "usb3-phy";
842 840 usb-role-switch;
843 - dr_mode = "peripheral";
841 + role-switch-default-mode = "peripheral";
841 + maximum-speed = "high-speed";
3.
843 +
844 + dr_mode = "peripheral";
4.
844 - dr_mode = "peripheral";
844 + dr_mode = "otg";
I've also validated that my hardware connection works by booting into serial downloader boot mode, in which case I've been able to see the `STMicroelectronics STM Device in DFU Mode`.
I did come across this post: https://community.st.com/t5/stm32-mpus-products-and-hardware/stm32mp257dak3-usb3dr-not-working-in-peripheral-mode-under-linux/m-p/796776
It seems like a similar, if not the same issue, but they don't actually detail what they did to the u-boot device tree to make it work.
Anyway, I'd appreciate any help anyone is willing to give!
Justin
