linux-kernel - [RESEND PATCH v4 2/2] arm64: dts: uniphier: add nodes of thermal monitor and thermal zone for LD20

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Date:   Mon,  4 Sep 2017 15:58:37 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     yamada.masahiro@...ionext.com, robh+dt@...nel.org,
        mark.rutland@....com
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, masami.hiramatsu@...aro.org,
        jaswinder.singh@...aro.org,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [RESEND PATCH v4 2/2] arm64: dts: uniphier: add nodes of thermal monitor and thermal zone for LD20

Add nodes of thermal monitor and thermal zone for UniPhier LD20 SoC.
The thermal monitor node is included in sysctrl. Since the efuse might not
have a calibrated value of thermal monitor, this patch gives the default
value for LD20.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
---
 arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi | 45 ++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi b/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
index a29c279..59e5ae6 100644
--- a/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
+++ b/arch/arm64/boot/dts/socionext/uniphier-ld20.dtsi
@@ -7,6 +7,8 @@
  * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
  */
 
+#include <dt-bindings/thermal/thermal.h>
+
 /memreserve/ 0x80000000 0x02000000;
 
 / {
@@ -46,6 +48,7 @@
 			clocks = <&sys_clk 32>;
 			enable-method = "psci";
 			operating-points-v2 = <&cluster0_opp>;
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu@1 {
@@ -64,6 +67,7 @@
 			clocks = <&sys_clk 33>;
 			enable-method = "psci";
 			operating-points-v2 = <&cluster1_opp>;
+			#cooling-cells = <2>;
 		};
 
 		cpu3: cpu@101 {
@@ -173,6 +177,40 @@
 			     <1 10 4>;
 	};
 
+	thermal-zones {
+		cpu_thermal {
+			polling-delay-passive = <250>;	/* 250ms */
+			polling-delay = <1000>;		/* 1000ms */
+			thermal-sensors = <&pvtctl>;
+
+			trips {
+				cpu_crit: cpu_crit {
+					temperature = <110000>;	/* 110C */
+					hysteresis = <2000>;
+					type = "critical";
+				};
+				cpu_alert: cpu_alert {
+					temperature = <100000>;	/* 100C */
+					hysteresis = <2000>;
+					type = "passive";
+				};
+			};
+
+			cooling-maps {
+				map0 {
+					trip = <&cpu_alert>;
+					cooling-device = <&cpu0
+					    THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+				map1 {
+					trip = <&cpu_alert>;
+					cooling-device = <&cpu2
+					    THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+	};
+
 	soc@0 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -410,6 +448,13 @@
 			watchdog {
 				compatible = "socionext,uniphier-wdt";
 			};
+
+			pvtctl: pvtctl {
+				compatible = "socionext,uniphier-ld20-thermal";
+				interrupts = <0 3 4>;
+				#thermal-sensor-cells = <0>;
+				socionext,tmod-calibration = <0x0f22 0x68ee>;
+			};
 		};
 
 		nand: nand@...00000 {
-- 
2.7.4