How can I find out what is the driver for device node '/dev/video11'

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In linux kernel, a device (e.g. codec) can register as a file (e.g.
/dev/video11).

How can I find out from the code which driver is registered as
'/dev/video11'. i.e. what is the driver will be invoked when I
open('/dev/video11', O_RDWR,0) in my user space code?
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