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From: Ondrej Jirman <megous@megous.com>
To: linux-sunxi@googlegroups.com
Cc: Ondrej Jirman <megous@megous.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND
	FLATTENED DEVICE TREE BINDINGS),
	linux-arm-kernel@lists.infradead.org (moderated
	list:ARM/Allwinner sunXi SoC support),
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] ARM: dts: sun8i-h3: Add thermal trip points/cooling maps
Date: Sat, 22 Feb 2020 22:42:24 +0100	[thread overview]
Message-ID: <20200222214224.209860-1-megous@megous.com> (raw)

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

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 arch/arm/boot/dts/sun8i-h3.dtsi | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index 7d2e30a00cd2a..dca51548881a8 100644
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -41,6 +41,7 @@
  */
 
 #include "sunxi-h3-h5.dtsi"
+#include <dt-bindings/thermal/thermal.h>
 
 / {
 	cpus {
@@ -204,6 +205,30 @@ cpu_thermal: cpu-thermal {
 			polling-delay-passive = <0>;
 			polling-delay = <0>;
 			thermal-sensors = <&ths 0>;
+
+			trips {
+				cpu_hot_trip: cpu-hot {
+					temperature = <80000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_very_hot_trip: cpu-very-hot {
+					temperature = <100000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				cpu-hot-limit {
+					trip = <&cpu_hot_trip>;
+					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>;
+				};
+			};
 		};
 	};
 };
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Ondrej Jirman <megous@megous.com>
To: linux-sunxi@googlegroups.com
Cc: Ondrej Jirman <megous@megous.com>,
	Mark Rutland <mark.rutland@arm.com>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>,
	Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Rob Herring <robh+dt@kernel.org>,
	"moderated list:ARM/Allwinner sunXi SoC support"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH] ARM: dts: sun8i-h3: Add thermal trip points/cooling maps
Date: Sat, 22 Feb 2020 22:42:24 +0100	[thread overview]
Message-ID: <20200222214224.209860-1-megous@megous.com> (raw)

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

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 arch/arm/boot/dts/sun8i-h3.dtsi | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index 7d2e30a00cd2a..dca51548881a8 100644
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -41,6 +41,7 @@
  */
 
 #include "sunxi-h3-h5.dtsi"
+#include <dt-bindings/thermal/thermal.h>
 
 / {
 	cpus {
@@ -204,6 +205,30 @@ cpu_thermal: cpu-thermal {
 			polling-delay-passive = <0>;
 			polling-delay = <0>;
 			thermal-sensors = <&ths 0>;
+
+			trips {
+				cpu_hot_trip: cpu-hot {
+					temperature = <80000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_very_hot_trip: cpu-very-hot {
+					temperature = <100000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				cpu-hot-limit {
+					trip = <&cpu_hot_trip>;
+					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>;
+				};
+			};
 		};
 	};
 };
-- 
2.25.1


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             reply	other threads:[~2020-02-22 21:42 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-22 21:42 Ondrej Jirman [this message]
2020-02-22 21:42 ` [PATCH] ARM: dts: sun8i-h3: Add thermal trip points/cooling maps Ondrej Jirman
2020-02-23  3:29 ` Chen-Yu Tsai
2020-02-23  3:29   ` Chen-Yu Tsai
2020-02-23 10:16   ` Ondřej Jirman
2020-02-23 10:16     ` Ondřej Jirman

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