linux-kernel - [PATCH V2 3/3] arm64: dts: imx8mp: Add thermal zones support

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Message-Id: <1584674791-9717-3-git-send-email-Anson.Huang@nxp.com>
Date:   Fri, 20 Mar 2020 11:26:31 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     rui.zhang@...el.com, daniel.lezcano@...aro.org,
        amit.kucheria@...durent.com, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, horia.geanta@....com, peng.fan@....com,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH V2 3/3] arm64: dts: imx8mp: Add thermal zones support

i.MX8MP has a TMU inside which supports two thermal zones, add support
for them.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
No change.
---
 arch/arm64/boot/dts/freescale/imx8mp.dtsi | 63 +++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 9b1616e..175165b 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -7,6 +7,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/thermal/thermal.h>
 
 #include "imx8mp-pinfunc.h"
 
@@ -43,6 +44,7 @@
 			clocks = <&clk IMX8MP_CLK_ARM>;
 			enable-method = "psci";
 			next-level-cache = <&A53_L2>;
+			#cooling-cells = <2>;
 		};
 
 		A53_1: cpu@1 {
@@ -53,6 +55,7 @@
 			clocks = <&clk IMX8MP_CLK_ARM>;
 			enable-method = "psci";
 			next-level-cache = <&A53_L2>;
+			#cooling-cells = <2>;
 		};
 
 		A53_2: cpu@2 {
@@ -63,6 +66,7 @@
 			clocks = <&clk IMX8MP_CLK_ARM>;
 			enable-method = "psci";
 			next-level-cache = <&A53_L2>;
+			#cooling-cells = <2>;
 		};
 
 		A53_3: cpu@3 {
@@ -73,6 +77,7 @@
 			clocks = <&clk IMX8MP_CLK_ARM>;
 			enable-method = "psci";
 			next-level-cache = <&A53_L2>;
+			#cooling-cells = <2>;
 		};
 
 		A53_L2: l2-cache0 {
@@ -127,6 +132,57 @@
 		method = "smc";
 	};
 
+	thermal-zones {
+		cpu-thermal {
+			polling-delay-passive = <250>;
+			polling-delay = <2000>;
+			thermal-sensors = <&tmu 0x0>;
+			trips {
+				cpu_alert0: trip0 {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_crit0: trip1 {
+					temperature = <95000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				map0 {
+					trip = <&cpu_alert0>;
+					cooling-device =
+						<&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&A53_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&A53_2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+
+		soc-thermal {
+			polling-delay-passive = <250>;
+			polling-delay = <2000>;
+			thermal-sensors = <&tmu 0x1>;
+			trips {
+				soc_alert0: trip0 {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				soc_crit0: trip1 {
+					temperature = <95000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(6) | IRQ_TYPE_LEVEL_LOW)>,
@@ -215,6 +271,13 @@
 				gpio-ranges = <&iomuxc 0 114 30>;
 			};
 
+			tmu: tmu@...60000 {
+				compatible = "fsl,imx8mp-tmu";
+				reg = <0x30260000 0x10000>;
+				clocks = <&clk IMX8MP_CLK_TSENSOR_ROOT>;
+				#thermal-sensor-cells = <1>;
+			};
+
 			wdog1: watchdog@...80000 {
 				compatible = "fsl,imx8mp-wdt", "fsl,imx21-wdt";
 				reg = <0x30280000 0x10000>;
-- 
2.7.4