ath9k_hw: remove baseband rfsilent support

When rfkill is enabled, ath9k_hw unnecessarily configured the baseband to
turn off based on GPIO input, however that code was hardcoded to GPIO 0
instead of ah->rfkill_gpio.
Since ath9k uses software rfkill anyway, this code is completely unnecessary
and should be removed in case anything else ever uses GPIO 0.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar5008_phy.c

@@ -961,18 +961,6 @@ static void ar5008_hw_rfbus_done(struct ath_hw *ah)
 	REG_WRITE(ah, AR_PHY_RFBUS_REQ, 0);
 }
 
-static void ar5008_hw_enable_rfkill(struct ath_hw *ah)
-{
-	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
-		    AR_GPIO_INPUT_EN_VAL_RFSILENT_BB);
-
-	REG_CLR_BIT(ah, AR_GPIO_INPUT_MUX2,
-		    AR_GPIO_INPUT_MUX2_RFSILENT);
-
-	ath9k_hw_cfg_gpio_input(ah, ah->rfkill_gpio);
-	REG_SET_BIT(ah, AR_PHY_TEST, RFSILENT_BB);
-}
-
 static void ar5008_restore_chainmask(struct ath_hw *ah)
 {
 	int rx_chainmask = ah->rxchainmask;
@@ -1629,7 +1617,6 @@ void ar5008_hw_attach_phy_ops(struct ath_hw *ah)
 	priv_ops->set_delta_slope = ar5008_hw_set_delta_slope;
 	priv_ops->rfbus_req = ar5008_hw_rfbus_req;
 	priv_ops->rfbus_done = ar5008_hw_rfbus_done;
-	priv_ops->enable_rfkill = ar5008_hw_enable_rfkill;
 	priv_ops->restore_chainmask = ar5008_restore_chainmask;
 	priv_ops->set_diversity = ar5008_set_diversity;
 	priv_ops->do_getnf = ar5008_hw_do_getnf;

drivers/net/wireless/ath/ath9k/ar9003_phy.c

@@ -745,28 +745,6 @@ static void ar9003_hw_rfbus_done(struct ath_hw *ah)
 	REG_WRITE(ah, AR_PHY_RFBUS_REQ, 0);
 }
 
-/*
- * Set the interrupt and GPIO values so the ISR can disable RF
- * on a switch signal.  Assumes GPIO port and interrupt polarity
- * are set prior to call.
- */
-static void ar9003_hw_enable_rfkill(struct ath_hw *ah)
-{
-	/* Connect rfsilent_bb_l to baseband */
-	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
-		    AR_GPIO_INPUT_EN_VAL_RFSILENT_BB);
-	/* Set input mux for rfsilent_bb_l to GPIO #0 */
-	REG_CLR_BIT(ah, AR_GPIO_INPUT_MUX2,
-		    AR_GPIO_INPUT_MUX2_RFSILENT);
-
-	/*
-	 * Configure the desired GPIO port for input and
-	 * enable baseband rf silence.
-	 */
-	ath9k_hw_cfg_gpio_input(ah, ah->rfkill_gpio);
-	REG_SET_BIT(ah, AR_PHY_TEST, RFSILENT_BB);
-}
-
 static void ar9003_hw_set_diversity(struct ath_hw *ah, bool value)
 {
 	u32 v = REG_READ(ah, AR_PHY_CCK_DETECT);
@@ -1203,7 +1181,6 @@ void ar9003_hw_attach_phy_ops(struct ath_hw *ah)
 	priv_ops->set_delta_slope = ar9003_hw_set_delta_slope;
 	priv_ops->rfbus_req = ar9003_hw_rfbus_req;
 	priv_ops->rfbus_done = ar9003_hw_rfbus_done;
-	priv_ops->enable_rfkill = ar9003_hw_enable_rfkill;
 	priv_ops->set_diversity = ar9003_hw_set_diversity;
 	priv_ops->ani_control = ar9003_hw_ani_control;
 	priv_ops->do_getnf = ar9003_hw_do_getnf;

drivers/net/wireless/ath/ath9k/hw-ops.h

@@ -223,11 +223,6 @@ static inline void ath9k_hw_rfbus_done(struct ath_hw *ah)
 	return ath9k_hw_private_ops(ah)->rfbus_done(ah);
 }
 
-static inline void ath9k_enable_rfkill(struct ath_hw *ah)
-{
-	return ath9k_hw_private_ops(ah)->enable_rfkill(ah);
-}
-
 static inline void ath9k_hw_restore_chainmask(struct ath_hw *ah)
 {
 	if (!ath9k_hw_private_ops(ah)->restore_chainmask)

drivers/net/wireless/ath/ath9k/hw.c

@@ -1385,7 +1385,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
 	ath9k_hw_init_qos(ah);
 
 	if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
-		ath9k_enable_rfkill(ah);
+		ath9k_hw_cfg_gpio_input(ah, ah->rfkill_gpio);
 
 	ath9k_hw_init_global_settings(ah);
 

drivers/net/wireless/ath/ath9k/hw.h

@@ -576,7 +576,6 @@ struct ath_hw_private_ops {
 	void (*set_delta_slope)(struct ath_hw *ah, struct ath9k_channel *chan);
 	bool (*rfbus_req)(struct ath_hw *ah);
 	void (*rfbus_done)(struct ath_hw *ah);
-	void (*enable_rfkill)(struct ath_hw *ah);
 	void (*restore_chainmask)(struct ath_hw *ah);
 	void (*set_diversity)(struct ath_hw *ah, bool value);
 	u32 (*compute_pll_control)(struct ath_hw *ah,