在Linux中禁用网络摄像头的自动对焦

I'm working in embebed system in the beagleboard. The source code is in Python, but I import libraries from OpenCV to do image processing. Actually, I'm using the webcam Logitech c910, it's a excellent camera but it has autofocus. I would like to know if I can disable the autofocus from Python or any program in Linux?I'm working in embebed system in the beagleboar