--- /dev/null
+From: Felix Fietkau <nbd@nbd.name>
+Date: Mon, 11 Jul 2016 12:07:40 +0200
+Subject: [PATCH] ath9k_hw: set spectral scan enable bit on trigger for
+ AR9003+
+
+AR9002 code and QCA AR9003+ code do the same.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
++++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+@@ -1800,6 +1800,8 @@ static void ar9003_hw_spectral_scan_conf
+
+ static void ar9003_hw_spectral_scan_trigger(struct ath_hw *ah)
+ {
++ REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN,
++ AR_PHY_SPECTRAL_SCAN_ENABLE);
+ /* Activate spectral scan */
+ REG_SET_BIT(ah, AR_PHY_SPECTRAL_SCAN,
+ AR_PHY_SPECTRAL_SCAN_ACTIVE);