Question [Q] Kernel building, adding module

Hi. I need some clarification on building the kernel.
Can i add a kernel module directly from terminal emulator?
I need libusbhost library which is present in system/lib but when i try to connect an external device to the smartphone it doesn't work properly.
I've read that when smarthpone is on host mode, each time a new device is connected OS creates a new file in dev/bus/usb.
In my case there isn't bus folder under /dev

Thanks