[PATCH] wifi: mt76: mt7925: introduce thermal protection

[Mingyen Hsieh]

From: Leon Yen <leon.yen at mediatek.com>

Add thermal protection to prevent the chip from possible overheating
due to prolonged high traffic and adverse operating conditions.

Signed-off-by: Leon Yen <leon.yen at mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh at mediatek.com>
---
 .../net/wireless/mediatek/mt76/mt7925/init.c  |  6 ++++++
 .../net/wireless/mediatek/mt76/mt7925/mcu.c   | 20 ++++++++++++++++++-
 .../net/wireless/mediatek/mt76/mt7925/mcu.h   |  1 +
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/init.c b/drivers/net/wireless/mediatek/mt76/mt7925/init.c
index 79639be0d29a..2a83ff59a968 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/init.c
@@ -322,6 +322,12 @@ static void mt7925_init_work(struct work_struct *work)
 		return;
 	}
 
+	ret = mt7925_mcu_set_thermal_protect(dev);
+	if (ret) {
+		dev_err(dev->mt76.dev, "thermal protection enable failed\n");
+		return;
+	}
+
 	/* we support chip reset now */
 	dev->hw_init_done = true;
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index d7116d8b020c..ca5d6b87c9da 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -1061,6 +1061,23 @@ int mt7925_mcu_set_deep_sleep(struct mt792x_dev *dev, bool enable)
 }
 EXPORT_SYMBOL_GPL(mt7925_mcu_set_deep_sleep);
 
+int mt7925_mcu_set_thermal_protect(struct mt792x_dev *dev)
+{
+	char cmd[64];
+	int ret = 0;
+
+	snprintf(cmd, sizeof(cmd), "ThermalProtGband %d %d %d %d %d %d %d %d %d %d",
+		 0, 100, 90, 80, 30, 1, 1, 115, 105, 5);
+	ret = mt7925_mcu_chip_config(dev, cmd);
+
+	snprintf(cmd, sizeof(cmd), "ThermalProtAband %d %d %d %d %d %d %d %d %d %d",
+		 1, 100, 90, 80, 30, 1, 1, 115, 105, 5);
+	ret |= mt7925_mcu_chip_config(dev, cmd);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mt7925_mcu_set_thermal_protect);
+
 int mt7925_run_firmware(struct mt792x_dev *dev)
 {
 	int err;
@@ -3463,7 +3480,8 @@ int mt7925_mcu_fill_message(struct mt76_dev *mdev, struct sk_buff *skb,
 		else
 			uni_txd->option = MCU_CMD_UNI_EXT_ACK;
 
-		if (cmd == MCU_UNI_CMD(HIF_CTRL))
+		if (cmd == MCU_UNI_CMD(HIF_CTRL) ||
+		    cmd == MCU_UNI_CMD(CHIP_CONFIG))
 			uni_txd->option &= ~MCU_CMD_ACK;
 
 		goto exit;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
index a13b5ae42b00..22237c68cbf7 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
@@ -654,6 +654,7 @@ int mt7925_mcu_add_bss_info(struct mt792x_phy *phy,
 int mt7925_mcu_set_timing(struct mt792x_phy *phy,
 			  struct ieee80211_bss_conf *link_conf);
 int mt7925_mcu_set_deep_sleep(struct mt792x_dev *dev, bool enable);
+int mt7925_mcu_set_thermal_protect(struct mt792x_dev *dev);
 int mt7925_mcu_set_channel_domain(struct mt76_phy *phy);
 int mt7925_mcu_set_radio_en(struct mt792x_phy *phy, bool enable);
 int mt7925_mcu_set_chctx(struct mt76_phy *phy, struct mt76_vif_link *mvif,
-- 
2.34.1