mt76: move mt76x02_phy_adjust_vga_gain in mt76/mt76x02_phy.c

Move mt76x02_phy_adjust_vga_gain routine in mt76x02-lib module
in order to be reused by mt76x0 driver for vga calibration
Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x02_phy.c

@@ -223,3 +223,24 @@ void mt76x02_phy_set_band(struct mt76x02_dev *dev, int band,
 		       primary_upper);
 }
 EXPORT_SYMBOL_GPL(mt76x02_phy_set_band);
+
+bool mt76x02_phy_adjust_vga_gain(struct mt76x02_dev *dev)
+{
+	u8 limit = dev->cal.low_gain > 0 ? 16 : 4;
+	bool ret = false;
+	u32 false_cca;
+
+	false_cca = FIELD_GET(MT_RX_STAT_1_CCA_ERRORS, mt76_rr(dev, MT_RX_STAT_1));
+	dev->cal.false_cca = false_cca;
+	if (false_cca > 800 && dev->cal.agc_gain_adjust < limit) {
+		dev->cal.agc_gain_adjust += 2;
+		ret = true;
+	} else if ((false_cca < 10 && dev->cal.agc_gain_adjust > 0) ||
+		   (dev->cal.agc_gain_adjust >= limit && false_cca < 500)) {
+		dev->cal.agc_gain_adjust -= 2;
+		ret = true;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mt76x02_phy_adjust_vga_gain);

drivers/net/wireless/mediatek/mt76/mt76x02_phy.h

@@ -55,5 +55,6 @@ int mt76x02_phy_get_min_avg_rssi(struct mt76x02_dev *dev);
 void mt76x02_phy_set_bw(struct mt76x02_dev *dev, int width, u8 ctrl);
 void mt76x02_phy_set_band(struct mt76x02_dev *dev, int band,
 			  bool primary_upper);
+bool mt76x02_phy_adjust_vga_gain(struct mt76x02_dev *dev);
 
 #endif /* __MT76x02_PHY_H */

drivers/net/wireless/mediatek/mt76/mt76x2/pci_phy.c

@@ -156,25 +156,6 @@ mt76x2_phy_set_gain_val(struct mt76x02_dev *dev)
 		mt76x2_dfs_adjust_agc(dev);
 }
 
-static void
-mt76x2_phy_adjust_vga_gain(struct mt76x02_dev *dev)
-{
-	u32 false_cca;
-	u8 limit = dev->cal.low_gain > 0 ? 16 : 4;
-
-	false_cca = FIELD_GET(MT_RX_STAT_1_CCA_ERRORS, mt76_rr(dev, MT_RX_STAT_1));
-	dev->cal.false_cca = false_cca;
-	if (false_cca > 800 && dev->cal.agc_gain_adjust < limit)
-		dev->cal.agc_gain_adjust += 2;
-	else if ((false_cca < 10 && dev->cal.agc_gain_adjust > 0) ||
-		 (dev->cal.agc_gain_adjust >= limit && false_cca < 500))
-		dev->cal.agc_gain_adjust -= 2;
-	else
-		return;
-
-	mt76x2_phy_set_gain_val(dev);
-}
-
 static void
 mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
 {
@@ -193,7 +174,8 @@ mt76x2_phy_update_channel_gain(struct mt76x02_dev *dev)
 	dev->cal.low_gain = low_gain;
 
 	if (!gain_change) {
-		mt76x2_phy_adjust_vga_gain(dev);
+		if (mt76x02_phy_adjust_vga_gain(dev))
+			mt76x2_phy_set_gain_val(dev);
 		return;
 	}