linux-kernel - [RFC PATCH 3/3] arm64: dts: renesas: r9a09g047: Add thermal hotplug trip point

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Message-ID: <20250309121324.29633-4-john.madieu.xa@bp.renesas.com>
Date: Sun,  9 Mar 2025 13:13:23 +0100
From: John Madieu <john.madieu.xa@...renesas.com>
To: geert+renesas@...der.be,
	niklas.soderlund+renesas@...natech.se,
	conor+dt@...nel.org,
	krzk+dt@...nel.org,
	robh@...nel.org,
	rafael@...nel.org,
	daniel.lezcano@...aro.org
Cc: magnus.damm@...il.com,
	claudiu.beznea.uj@...renesas.com,
	devicetree@...r.kernel.org,
	john.madieu@...il.com,
	rui.zhang@...el.com,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	linux-pm@...r.kernel.org,
	John Madieu <john.madieu.xa@...renesas.com>
Subject: [RFC PATCH 3/3] arm64: dts: renesas: r9a09g047: Add thermal hotplug trip point

Add CPU hotplug trip point to shutdown CPU1 and CPU2 when exceeding 110°C.

Signed-off-by: John Madieu <john.madieu.xa@...renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g047.dtsi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
index 93b57d7ad7b9..06bd394582e2 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g047.dtsi
@@ -533,6 +533,13 @@ map0 {
 							 <&cpu2 0 3>, <&cpu3 0 3>;
 					contribution = <1024>;
 				};
+
+				map1 {
+					trip = <&trip_emergency>;
+					cooling-device = <&cpu1 0 1>, <&cpu2 0 1>;
+					contribution = <1024>;
+				};
+
 			};
 
 			trips {
@@ -542,6 +549,12 @@ target: trip-point {
 					type = "passive";
 				};
 
+				trip_emergency: emergency {
+					temperature = <110000>;
+					hysteresis = <1000>;
+					type = "plug";
+				};
+
 				sensor_crit: sensor-crit {
 					temperature = <120000>;
 					hysteresis = <1000>;
-- 
2.25.1