linux-kernel - [PATCH v4 2/2] arm64: dts: allwinner: h6: Add thermal trip points/cooling map

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Message-Id: <20200420124634.32726-3-peron.clem@gmail.com>
Date:   Mon, 20 Apr 2020 14:46:34 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Ondrej Jirman <megous@...ous.com>,
        Clément Péron <peron.clem@...il.com>
Subject: [PATCH v4 2/2] arm64: dts: allwinner: h6: Add thermal trip points/cooling map

From: Ondrej Jirman <megous@...ous.com>

This enables passive cooling by down-regulating CPU voltage
and frequency.

Signed-off-by: Ondrej Jirman <megous@...ous.com>
Signed-off-by: Clément Péron <peron.clem@...il.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 24 ++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
index 370e77b86fe1..60da1627772b 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
@@ -964,6 +964,30 @@
 			polling-delay-passive = <0>;
 			polling-delay = <0>;
 			thermal-sensors = <&ths 0>;
+
+			trips {
+				cpu_alert: cpu-alert {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu-crit {
+					temperature = <100000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				map0 {
+					trip = <&cpu_alert>;
+					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
 		};
 
 		gpu-thermal {
-- 
2.20.1