linux-kernel - [PATCH 9/9] arm64: dts: Create SoC thermal zone for Juno

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Message-Id: <1437573763-6525-10-git-send-email-punit.agrawal@arm.com>
Date:	Wed, 22 Jul 2015 15:02:43 +0100
From:	Punit Agrawal <punit.agrawal@....com>
To:	linux-pm@...r.kernel.org
Cc:	Punit Agrawal <punit.agrawal@....com>, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Sudeep Holla <sudeep.holla@....com>
Subject: [PATCH 9/9] arm64: dts: Create SoC thermal zone for Juno

Setup a thermal zone driven by the SoC temperature sensor on Juno
r0. Create passive trip points and bind them to cpufreq cooling
devices that support the power extensions.

Signed-off-by: Punit Agrawal <punit.agrawal@....com>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Liviu Dudau <liviu.dudau@....com>
Cc: Sudeep Holla <sudeep.holla@....com>
---
 arch/arm64/boot/dts/arm/juno.dts | 50 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/arm/juno.dts b/arch/arm64/boot/dts/arm/juno.dts
index d2e67f3..664961c 100644
--- a/arch/arm64/boot/dts/arm/juno.dts
+++ b/arch/arm64/boot/dts/arm/juno.dts
@@ -9,6 +9,7 @@
 /dts-v1/;
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/thermal/thermal.h>
 
 / {
 	model = "ARM Juno development board (r0)";
@@ -90,6 +91,8 @@
 			next-level-cache = <&A57_L2>;
 			clocks = <&scpi_dvfs 0>;
 			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+			#cooling-cells = <2>;
+			dynamic-power-coefficient = <530>;
 		};
 
 		A57_1: cpu@1 {
@@ -100,6 +103,8 @@
 			next-level-cache = <&A57_L2>;
 			clocks = <&scpi_dvfs 0>;
 			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+			#cooling-cells = <2>;
+			dynamic-power-coefficient = <530>;
 		};
 
 		A53_0: cpu@100 {
@@ -110,6 +115,8 @@
 			next-level-cache = <&A53_L2>;
 			clocks = <&scpi_dvfs 1>;
 			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+			#cooling-cells = <2>;
+			dynamic-power-coefficient = <140>;
 		};
 
 		A53_1: cpu@101 {
@@ -120,6 +127,8 @@
 			next-level-cache = <&A53_L2>;
 			clocks = <&scpi_dvfs 1>;
 			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+			#cooling-cells = <2>;
+			dynamic-power-coefficient = <140>;
 		};
 
 		A53_2: cpu@102 {
@@ -130,6 +139,8 @@
 			next-level-cache = <&A53_L2>;
 			clocks = <&scpi_dvfs 1>;
 			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+			#cooling-cells = <2>;
+			dynamic-power-coefficient = <140>;
 		};
 
 		A53_3: cpu@103 {
@@ -140,6 +151,8 @@
 			next-level-cache = <&A53_L2>;
 			clocks = <&scpi_dvfs 1>;
 			cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>;
+			#cooling-cells = <2>;
+			dynamic-power-coefficient = <140>;
 		};
 
 		A57_L2: l2-cache0 {
@@ -167,5 +180,42 @@
 				     <&A53_3>;
 	};
 
+	thermal-zones {
+		soc_thermal {
+			polling-delay = <1000>;
+			polling-delay-passive = <100>;
+			sustainable-power = <2500>;
+
+			thermal-sensors = <&scpi_sensors0 3>;
+
+			trips {
+				threshold: trip-point@0 {
+					temperature = <55000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+				target: trip-point@1 {
+					temperature = <65000>;
+					hysteresis = <1000>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map0 {
+					trip = <&target>;
+					cooling-device = <&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+					contribution = <2048>;
+				};
+				map1 {
+					trip = <&target>;
+					cooling-device = <&A57_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+					contribution = <1024>;
+				};
+
+			};
+		};
+	};
+
 	#include "juno-base.dtsi"
 };
-- 
2.1.4

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