Not quite sure what you want to achieve. Which platform dou you have?
But the most likely scenario is: you have several physical ports and you want to bundle them into one etherchannel. This port-channel interface should be bridged to the WLAN. Could even make sense if you only 100 Mbit/s ports and 802.11n WLAN...
Just follow the bridging configuration guides and assign only the port channel interface to the bridge group, not the physical channel members.
