As the question says it all, I would just like to elaborate with an example:

i915.i915_enable_rc6=1

This is an option for i915 module or intel video driver. So is there any way to know or list something like i915_enable_rc6 is an option for i915 from linux commandline ?

I hope I am clear with the question ?

Edit: I was referring to i915 just for example and nothing else. modinfo seems to be the command I was looking for.