On Mon, Sep 03, 2018 at 09:39:14AM +0300, Ranran wrote: > Hello, > > I try to add gadget configfs as described in: > https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt > Yet, I find nothing in /sys/class/udc: > > user@user-VirtualBox:~/tegra$ ls /sys/class/udc/ -al > total 0 > drwxr-xr-x 2 root root 0 Sep 3 00:30 . > drwxr-xr-x 58 root root 0 Sep 3 00:30 .. > > I also don't have dwc2, but dwc3: > user@user-VirtualBox:~/tegra$ lsmod | grep dw > dwc3 90112 0 > ulpi 16384 1 dwc3 > udc_core 24576 2 dwc3,libcomposite > user@user-VirtualBox:~/tegra$ > > Kernel is 4.4.50. Why do you think the dwc3 driver will work here? Do you really have this hardware being emulated? And 4.4.50 is very old, please use a modern kernel please. thanks, greg k-h
