diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index a2f85b7..9f4398c 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -667,7 +667,12 @@
 static void ath9k_hw_init_pll(struct ath_hw *ah,
 			      struct ath9k_channel *chan)
 {
-	u32 pll = ath9k_hw_compute_pll_control(ah, chan);
+	u32 pll;
+
+	if (AR_SREV_9485(ah))
+		REG_WRITE(ah, AR_RTC_PLL_CONTROL2, 0x886666);
+
+	pll = ath9k_hw_compute_pll_control(ah, chan);
 
 	REG_WRITE(ah, AR_RTC_PLL_CONTROL, pll);
 
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 0153ba1..d3257f7 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -1114,6 +1114,8 @@
 #define AR_RTC_PLL_CONTROL \
 	((AR_SREV_9100(ah)) ? (AR_RTC_BASE + 0x0014) : 0x7014)
 
+#define AR_RTC_PLL_CONTROL2	0x703c
+
 #define AR_RTC_PLL_DIV          0x0000001f
 #define AR_RTC_PLL_DIV_S        0
 #define AR_RTC_PLL_DIV2         0x00000020