commit 7be0a6588fd3ca1e025b09cde120afaeeaf942da
Author: HUSSON Pierre-Hugues
Date: Sun Mar 14 12:39:29 2010 +0100
Add rhodium proximity driver.
As there is no proper API for on/off yet,
I added two cmdline options:
board-htcrhodium-proximity.on=1 to enable the proximity device (default off)
board-htcrhodium-proximity.wake=1 to wake up the phone on proximity
change.
Might need a to-low/to-high filter.
__ Wondering if the above statement taken from the kernel autobuild site means that if I add that line to my set cmdline it might make the proximity sensor work... Anyone have any thoughts on this? Will test and update...
Nope..Don't go and do that. 
Reading it again I believe the author added the options but is awaiting the driver to be added/written.