From: Chad Monroe <chad@monroe.io>
Date: Tue, 11 Aug 2026 02:59:44 +0000 (-0700)
Subject: mediatek: filogic: mt-stuart: drive fan from AQR113C temperature
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dfec67f9ffbcd6603ee45022673c1ba849a1ed36;p=thirdparty%2Fopenwrt.git

mediatek: filogic: mt-stuart: drive fan from AQR113C temperature

The AQR113C PHYs run hot and sit away from the SoC sensor. Export
the PHY hwmon sensor as a thermal sensor and add a thermal zone per
AQR113C on all three boards. The zones drive the fan with trips at
108/104/100/90/80/40 C.

Set critical-action "reboot" so a runaway zone restarts the board
instead of an unclean thermal shutdown. Raise the trip hysteresis
from 2 C to 4 C to stop the fan from cycling near a trip point.
Stop passive polling; the zones use active cooling only.

Signed-off-by: Chad Monroe <chad@monroe.io>
Link: https://github.com/openwrt/openwrt/pull/24352
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
---

diff --git a/target/linux/mediatek/dts/mt7988a-smartrg-SDG-8733.dtsi b/target/linux/mediatek/dts/mt7988a-smartrg-SDG-8733.dtsi
index 6608286601d..c02a9600775 100644
--- a/target/linux/mediatek/dts/mt7988a-smartrg-SDG-8733.dtsi
+++ b/target/linux/mediatek/dts/mt7988a-smartrg-SDG-8733.dtsi
@@ -8,6 +8,18 @@
 
 #include "mt7988a-smartrg-mt-stuart-phase1.dtsi"
 
+/ {
+	thermal-zones {
+		aqr_wan_thermal: aqr-wan-thermal {
+			thermal-sensors = <&phy0>;
+			SDG_1FAN_THERMAL_MAP(aqr_wan_thermal, &fan,
+					     108000, 104000,
+					     100000, 90000,
+					     80000, 40000);
+		};
+	};
+};
+
 &gmac1 {
 	phy = <&phy0>;
 };
@@ -17,6 +29,7 @@
 		/* AQR113C */
 		compatible = "ethernet-phy-ieee802.3-c45";
 		reg = <0>;
+		#thermal-sensor-cells = <0>;
 
 		leds {
 			#address-cells = <1>;
diff --git a/target/linux/mediatek/dts/mt7988a-smartrg-mt-stuart-phase1.dtsi b/target/linux/mediatek/dts/mt7988a-smartrg-mt-stuart-phase1.dtsi
index d85cd0b2dcd..beed1034395 100644
--- a/target/linux/mediatek/dts/mt7988a-smartrg-mt-stuart-phase1.dtsi
+++ b/target/linux/mediatek/dts/mt7988a-smartrg-mt-stuart-phase1.dtsi
@@ -89,6 +89,14 @@
 					     110000, 80000,
 					     60000, 40000);
 		};
+
+		aqr_lan_thermal: aqr-lan-thermal {
+			thermal-sensors = <&phy8>;
+			SDG_1FAN_THERMAL_MAP(aqr_lan_thermal, &fan,
+					     108000, 104000,
+					     100000, 90000,
+					     80000, 40000);
+		};
 	};
 };
 
@@ -124,6 +132,7 @@
 		/* AQR113C */
 		compatible = "ethernet-phy-ieee802.3-c45";
 		reg = <8>;
+		#thermal-sensor-cells = <0>;
 
 		leds {
 			#address-cells = <1>;
diff --git a/target/linux/mediatek/dts/mt7988d-smartrg-SDG-8733A.dts b/target/linux/mediatek/dts/mt7988d-smartrg-SDG-8733A.dts
index 1e7b72e7015..8ca235c2e9b 100644
--- a/target/linux/mediatek/dts/mt7988d-smartrg-SDG-8733A.dts
+++ b/target/linux/mediatek/dts/mt7988d-smartrg-SDG-8733A.dts
@@ -96,6 +96,13 @@
 					     60000, 40000);
 		};
 
+		aqr_wan_thermal: aqr-wan-thermal {
+			thermal-sensors = <&phy8>;
+			SDG_1FAN_THERMAL_MAP(aqr_wan_thermal, &fan,
+					     108000, 104000,
+					     100000, 90000,
+					     80000, 40000);
+		};
 	};
 };
 
@@ -147,6 +154,7 @@
 		/* AQR113C */
 		compatible = "ethernet-phy-ieee802.3-c45";
 		reg = <8>;
+		#thermal-sensor-cells = <0>;
 
 		marvell,mdi-cfg-order = <0>;
 
diff --git a/target/linux/mediatek/dts/mt798x-smartrg-common.dtsi b/target/linux/mediatek/dts/mt798x-smartrg-common.dtsi
index 38d66736846..eb5b295a08f 100644
--- a/target/linux/mediatek/dts/mt798x-smartrg-common.dtsi
+++ b/target/linux/mediatek/dts/mt798x-smartrg-common.dtsi
@@ -5,8 +5,9 @@
  */
 
 #define SDG_THERMAL_HEADER									\
-	polling-delay-passive = <1000>;								\
+	polling-delay-passive = <0>;								\
 	polling-delay = <1000>;									\
+	critical-action = "reboot";								\
 	/delete-node/cooling-maps;								\
 	/delete-node/trips;
 
@@ -14,32 +15,32 @@
 	trips {											\
 		_cname##_critical: critical {							\
 			temperature = <_crit>;							\
-			hysteresis = <2000>;							\
+			hysteresis = <4000>;							\
 			type = "critical";							\
 		};										\
 		_cname##_hot: hot {								\
 			temperature = <_hot>;							\
-			hysteresis = <2000>;							\
+			hysteresis = <4000>;							\
 			type = "hot";								\
 		};										\
 		_cname##_active_high: active-high {						\
 			temperature = <_high>;							\
-			hysteresis = <2000>;							\
+			hysteresis = <4000>;							\
 			type = "active";							\
 		};										\
 		_cname##_active_med: active-med {						\
 			temperature = <_med>;							\
-			hysteresis = <2000>;							\
+			hysteresis = <4000>;							\
 			type = "active";							\
 		};										\
 		_cname##_active_low: active-low {						\
 			temperature = <_low>;							\
-			hysteresis = <2000>;							\
+			hysteresis = <4000>;							\
 			type = "active";							\
 		};										\
 		_cname##_active_silent: active-silent {						\
 			temperature = <_silent>;						\
-			hysteresis = <2000>;							\
+			hysteresis = <4000>;							\
 			type = "active";							\
 		};										\
 	};