ath6kl: report antenna configuration

This lets 'iw phy phy0 info' report antennas for
the radio device:

...
	Available Antennas: TX 0x2 RX 0x2
	Configured Antennas: TX 0x2 RX 0x2
...
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/cfg80211.c

@@ -3231,6 +3231,15 @@ static int ath6kl_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 					wait, buf, len, no_cck);
 }
 
+static int ath6kl_get_antenna(struct wiphy *wiphy,
+			      u32 *tx_ant, u32 *rx_ant)
+{
+	struct ath6kl *ar = wiphy_priv(wiphy);
+	*tx_ant = ar->hw.tx_ant;
+	*rx_ant = ar->hw.rx_ant;
+	return 0;
+}
+
 static void ath6kl_mgmt_frame_register(struct wiphy *wiphy,
 				       struct wireless_dev *wdev,
 				       u16 frame_type, bool reg)
@@ -3447,6 +3456,7 @@ static struct cfg80211_ops ath6kl_cfg80211_ops = {
 	.cancel_remain_on_channel = ath6kl_cancel_remain_on_channel,
 	.mgmt_tx = ath6kl_mgmt_tx,
 	.mgmt_frame_register = ath6kl_mgmt_frame_register,
+	.get_antenna = ath6kl_get_antenna,
 	.sched_scan_start = ath6kl_cfg80211_sscan_start,
 	.sched_scan_stop = ath6kl_cfg80211_sscan_stop,
 	.set_bitrate_mask = ath6kl_cfg80211_set_bitrate,
@@ -3794,11 +3804,18 @@ int ath6kl_cfg80211_init(struct ath6kl *ar)
 		ath6kl_band_5ghz.ht_cap.mcs.rx_mask[0] = 0xff;
 		ath6kl_band_2ghz.ht_cap.mcs.rx_mask[1] = 0xff;
 		ath6kl_band_5ghz.ht_cap.mcs.rx_mask[1] = 0xff;
+		ar->hw.tx_ant = 2;
+		ar->hw.rx_ant = 2;
 	} else {
 		ath6kl_band_2ghz.ht_cap.mcs.rx_mask[0] = 0xff;
 		ath6kl_band_5ghz.ht_cap.mcs.rx_mask[0] = 0xff;
+		ar->hw.tx_ant = 1;
+		ar->hw.rx_ant = 1;
 	}
 
+	wiphy->available_antennas_tx = ar->hw.tx_ant;
+	wiphy->available_antennas_rx = ar->hw.rx_ant;
+
 	if (band_2gig)
 		wiphy->bands[IEEE80211_BAND_2GHZ] = &ath6kl_band_2ghz;
 	if (band_5gig)

drivers/net/wireless/ath/ath6kl/core.h

@@ -782,6 +782,8 @@ struct ath6kl {
 		u32 refclk_hz;
 		u32 uarttx_pin;
 		u32 testscript_addr;
+		u8 tx_ant;
+		u8 rx_ant;
 		enum wmi_phy_cap cap;
 
 		u32 flags;