wifi: rtw89: 8852b: add chip_ops to get thermal

Thermal value reflects temperature that will affect RF performance, so
we re-calibrate RF characteristics if delta of thermal over a threshold.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221009125403.19662-5-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/rtw8852b.c

@@ -1397,6 +1397,23 @@ rtw8852b_init_txpwr_unit(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 	return 0;
 }
 
+static u8 rtw8852b_get_thermal(struct rtw89_dev *rtwdev, enum rtw89_rf_path rf_path)
+{
+	if (rtwdev->is_tssi_mode[rf_path]) {
+		u32 addr = 0x1c10 + (rf_path << 13);
+
+		return rtw89_phy_read32_mask(rtwdev, addr, 0x3F000000);
+	}
+
+	rtw89_write_rf(rtwdev, rf_path, RR_TM, RR_TM_TRI, 0x1);
+	rtw89_write_rf(rtwdev, rf_path, RR_TM, RR_TM_TRI, 0x0);
+	rtw89_write_rf(rtwdev, rf_path, RR_TM, RR_TM_TRI, 0x1);
+
+	fsleep(200);
+
+	return rtw89_read_rf(rtwdev, rf_path, RR_TM, RR_TM_VAL);
+}
+
 static int rtw8852b_mac_enable_bb_rf(struct rtw89_dev *rtwdev)
 {
 	int ret;
@@ -1463,6 +1480,7 @@ static const struct rtw89_chip_ops rtw8852b_chip_ops = {
 	.set_txpwr		= rtw8852b_set_txpwr,
 	.set_txpwr_ctrl		= rtw8852b_set_txpwr_ctrl,
 	.init_txpwr_unit	= rtw8852b_init_txpwr_unit,
+	.get_thermal		= rtw8852b_get_thermal,
 	.pwr_on_func		= rtw8852b_pwr_on_func,
 	.pwr_off_func		= rtw8852b_pwr_off_func,
 };