Arria 10 SoC – USB devices always enumerating as Full-Speed (Yocto 4.1, dwc2)

Hi angelsz15​ 

Arria 10 SoC FPGA does not contain an integrated High‑Speed USB PHY. You will need to provide an external USB2.0 HS PHY.

Could you check are these defined in the device tree?:

phy_type = "ulpi";
dr_mode = "host";
phys = <&usb_phy0>;
phy-names = "usb2-phy";

snps,phyif = <0>;         // ULPI
snps,hs_phy_type = "ulpi";
snps,fs_phy_type = "dedicated";

Also, check for the PHY binding status:

dmesg | grep -i phy
dmesg | grep -i ulpi

-Alan