ath9k_hw: Fix thermal issue with UB94

Hardcode the output voltage of x-PA bias LDO to the lowest
value for UB94. The card doesn't get too hot now.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/eeprom_def.c b/drivers/net/wireless/ath/ath9k/eeprom_def.c
index 088f141f2006..749a93608664 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom_def.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c
@@ -226,6 +226,10 @@ static int ath9k_hw_def_check_eeprom(struct ath_hw *ah)
             eep->baseEepHeader.pwdclkind == 0)
                 ah->need_an_top2_fixup = 1;
 
+        if ((common->bus_ops->ath_bus_type == ATH_USB) &&
+            (AR_SREV_9280(ah)))
+                eep->modalHeader[0].xpaBiasLvl = 0;
+
         return 0;
 }