ARM: dts: bcm2711: Enable thermal

This enables thermal for the BCM2711 (used on Raspberry Pi 4) by adding
the AVS monitor and a subnode for the thermal part.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1578941778-23321-4-git-send-email-stefan.wahren@i2se.com

arch/arm/boot/dts/bcm2711.dtsi

@@ -66,6 +66,17 @@ gicv2: interrupt-controller@40041000 {
 						 IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		avs_monitor: avs-monitor@7d5d2000 {
+			compatible = "brcm,bcm2711-avs-monitor",
+				     "syscon", "simple-mfd";
+			reg = <0x7d5d2000 0xf00>;
+
+			thermal: thermal {
+				compatible = "brcm,bcm2711-thermal";
+				#thermal-sensor-cells = <0>;
+			};
+		};
+
 		dma: dma@7e007000 {
 			compatible = "brcm,bcm2835-dma";
 			reg = <0x7e007000 0xb00>;
@@ -363,6 +374,7 @@ &clocks {
 
 &cpu_thermal {
 	coefficients = <(-487) 410040>;
+	thermal-sensors = <&thermal>;
 };
 
 &dsi0 {