ryvnf:~$ lsusb
Bus 008 Device 002: ID 0cf3:7015 Atheros Communications, Inc. TP-Link TL-WN821N v3 802.11n [Atheros AR7010+AR9287]
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
...

ryvnf:~$ lsmod | grep ath
ath9k_htc              51019  0
ath9k_common           21530  1 ath9k_htc
ath9k_hw              380024  2 ath9k_common,ath9k_htc
ath                    21707  3 ath9k_common,ath9k_htc,ath9k_hw
mac80211              421481  1 ath9k_htc
cfg80211              350041  5 ath,iwlwifi,ath9k_common,mac80211,ath9k_htc
usbcore               170994  5 uhci_hcd,ehci_hcd,ehci_pci,usbhid,ath9k_htc