wifi: mt76: mt7915: rework mt7915_thermal_temp_store()

Call mt7915_mcu_set_thermal_protect() through
mt7915_thermal_temp_store() to update firmware trigger/restore temp
directly.

Fixes: 02ee68b9 ("mt76: mt7915: add control knobs for thermal throttling")
Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Howard Hsu <howard-yh.hsu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/init.c

@@ -83,9 +83,23 @@ static ssize_t mt7915_thermal_temp_store(struct device *dev,
 
 	mutex_lock(&phy->dev->mt76.mutex);
 	val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), 60, 130);
+
+	if ((i - 1 == MT7915_CRIT_TEMP_IDX &&
+	     val > phy->throttle_temp[MT7915_MAX_TEMP_IDX]) ||
+	    (i - 1 == MT7915_MAX_TEMP_IDX &&
+	     val < phy->throttle_temp[MT7915_CRIT_TEMP_IDX])) {
+		dev_err(phy->dev->mt76.dev,
+			"temp1_max shall be greater than temp1_crit.");
+		return -EINVAL;
+	}
+
 	phy->throttle_temp[i - 1] = val;
 	mutex_unlock(&phy->dev->mt76.mutex);
 
+	ret = mt7915_mcu_set_thermal_protect(phy);
+	if (ret)
+		return ret;
+
 	return count;
 }
 
@@ -195,8 +209,8 @@ static int mt7915_thermal_init(struct mt7915_phy *phy)
 		return PTR_ERR(hwmon);
 
 	/* initialize critical/maximum high temperature */
-	phy->throttle_temp[0] = 110;
-	phy->throttle_temp[1] = 120;
+	phy->throttle_temp[MT7915_CRIT_TEMP_IDX] = 110;
+	phy->throttle_temp[MT7915_MAX_TEMP_IDX] = 120;
 
 	return 0;
 }

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -70,6 +70,9 @@
 
 #define MT7915_WED_RX_TOKEN_SIZE	12288
 
+#define MT7915_CRIT_TEMP_IDX		0
+#define MT7915_MAX_TEMP_IDX		1
+
 struct mt7915_vif;
 struct mt7915_sta;
 struct mt7915_dfs_pulse;