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For a list of all currently documented Atheros chipsets with specifications, see Atheros.
Toshiba part PA3722U-1MPC / K000072100
"WN7811A-LF-CP R01" and "P/N: 141781110000J" is silkscreened on the back of the board.
lspci -nnv dump
05:00.0 Network controller : Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01) Subsystem: Accton Technology Corporation WN7811A (Toshiba PA3722U-1MPC) 802.11bgn Wireless Half-size Mini PCIe Card [1113:e811] Physical Slot: 1 Flags: bus master, fast devsel, latency 0, IRQ 19 Memory at f1d00000 (64-bit, non-prefetchable) [size=64K] Capabilities:  Power Management version 3 Capabilities:  MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities:  Express Legacy Endpoint, MSI 00 Capabilities:  Advanced Error Reporting Capabilities:  Virtual Channel Capabilities:  Device Serial Number 00-15-17-ff-ff-24-14-12 Capabilities:  Power Budgeting <?> Kernel driver in use: ath9k
ath9k info dump
[115474.222408] ath: phy28: ASPM enabled: 0x43 [115474.222411] ath: EEPROM regdomain: 0x65 [115474.222412] ath: EEPROM indicates we should expect a direct regpair map [115474.222414] ath: Country alpha2 being used: 00 [115474.222415] ath: Regpair used: 0x65 [115474.223946] ieee80211 phy28: Selected rate control algorithm 'minstrel_ht' [115474.224443] ieee80211 phy28: Atheros AR9285 Rev:2 mem=0xffffc90007780000, irq=19