arm64: dts: renesas: r8a77990: add thermal device support

This patch adds the thermal device node and the thermal-zone for
the R8A77990 SoC.
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Tested-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a77990.dtsi

@@ -409,6 +409,18 @@ sysc: system-controller@e6180000 {
 			#power-domain-cells = <1>;
 		};
 
+		thermal: thermal@e6190000 {
+			compatible = "renesas,thermal-r8a77990";
+			reg = <0 0xe6190000 0 0x10>, <0 0xe6190100 0 0x38>;
+			interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 522>;
+			power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
+			resets = <&cpg 522>;
+			#thermal-sensor-cells = <0>;
+		};
+
 		intc_ex: interrupt-controller@e61c0000 {
 			compatible = "renesas,intc-ex-r8a77990", "renesas,irqc";
 			#interrupt-cells = <2>;
@@ -1745,6 +1757,25 @@ prr: chipid@fff00044 {
 		};
 	};
 
+	thermal-zones {
+		cpu-thermal {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+			thermal-sensors = <&thermal>;
+
+			trips {
+				cpu-crit {
+					temperature = <120000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+			};
+		};
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupts-extended = <&gic GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,