mac80211: rt2800: fix mt7620 vco calibration registers

Use register values from init LNA function instead of the ones from
restore LNA function. Apply register values based on rx path
configuration.

Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
[daniel@makrotopia.org: moved changes into a separate patch]

package/kernel/mac80211/patches/021-03-rt2800-fix-mt7620-vco-calibration-registers.patch

@@ -0,0 +1,50 @@
+From 02c452f317b4a4d06c433c294e66896a389731c1 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Tue, 18 Apr 2017 11:09:53 +0200
+Subject: [PATCH] rt2800: fix mt7620 vco calibration registers
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+To: Stanislaw Gruszka <sgruszka@redhat.com>
+Cc: Helmut Schaa <helmut.schaa@googlemail.com>,
+    linux-wireless@vger.kernel.org,
+    Kalle Valo <kvalo@codeaurora.org>,
+    Tom Psyborg <pozega.tomislav@gmail.com>
+
+Use register values from init LNA function instead of the ones from
+restore LNA function. Apply register values based on rx path
+configuration.
+
+Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+index 870bf315f98b..86cffee6876a 100644
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+@@ -4932,7 +4932,7 @@ void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev)
+ 	rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);
+ 
+ 	if (rt2x00_rt(rt2x00dev, RT6352)) {
+-		if (rt2x00dev->default_ant.tx_chain_num == 1) {
++		if (rt2x00dev->default_ant.rx_chain_num == 1) {
+ 			rt2800_bbp_write(rt2x00dev, 91, 0x07);
+ 			rt2800_bbp_write(rt2x00dev, 95, 0x1A);
+ 			rt2800_bbp_write(rt2x00dev, 195, 128);
+@@ -4953,8 +4953,8 @@ void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev)
+ 		}
+ 
+ 		if (rt2x00_has_cap_external_lna_bg(rt2x00dev)) {
+-			rt2800_bbp_write(rt2x00dev, 75, 0x60);
+-			rt2800_bbp_write(rt2x00dev, 76, 0x44);
++			rt2800_bbp_write(rt2x00dev, 75, 0x68);
++			rt2800_bbp_write(rt2x00dev, 76, 0x4C);
+ 			rt2800_bbp_write(rt2x00dev, 79, 0x1C);
+ 			rt2800_bbp_write(rt2x00dev, 80, 0x0C);
+ 			rt2800_bbp_write(rt2x00dev, 82, 0xB6);
+-- 
+2.12.2
+