overlays: Add rpi-poe-plus overlay

Signed-off-by: Serge Schneider <serge@raspberrypi.com>

arch/arm/boot/dts/overlays/Makefile

@@ -153,6 +153,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	rpi-display.dtbo \
 	rpi-ft5406.dtbo \
 	rpi-poe.dtbo \
+	rpi-poe-plus.dtbo \
 	rpi-proto.dtbo \
 	rpi-sense.dtbo \
 	rpi-tv.dtbo \

arch/arm/boot/dts/overlays/README

@@ -2412,6 +2412,27 @@ Params: poe_fan_temp0           Temperature (in millicelcius) at which the fan
                                 the fan slows down (default 5000)
 
 
+Name:   rpi-poe-plus
+Info:   Raspberry Pi PoE+ HAT fan
+Load:   dtoverlay=rpi-poe-plus,<param>[=<val>]
+Params: poe_fan_temp0           Temperature (in millicelcius) at which the fan
+                                turns on (default 40000)
+        poe_fan_temp0_hyst      Temperature delta (in millicelcius) at which
+                                the fan turns off (default 2000)
+        poe_fan_temp1           Temperature (in millicelcius) at which the fan
+                                speeds up (default 45000)
+        poe_fan_temp1_hyst      Temperature delta (in millicelcius) at which
+                                the fan slows down (default 2000)
+        poe_fan_temp2           Temperature (in millicelcius) at which the fan
+                                speeds up (default 50000)
+        poe_fan_temp2_hyst      Temperature delta (in millicelcius) at which
+                                the fan slows down (default 2000)
+        poe_fan_temp3           Temperature (in millicelcius) at which the fan
+                                speeds up (default 55000)
+        poe_fan_temp3_hyst      Temperature delta (in millicelcius) at which
+                                the fan slows down (default 5000)
+
+
 Name:   rpi-proto
 Info:   Configures the RPi Proto audio card
 Load:   dtoverlay=rpi-proto

arch/arm/boot/dts/overlays/rpi-poe-plus-overlay.dts

+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// Overlay for the Raspberry Pi PoE+ HAT.
+
+#include "rpi-poe-overlay.dts"
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@3 {
+		target-path = "/";
+		__overlay__ {
+			rpi_poe_power_supply: rpi-poe-power-supply@0 {
+				compatible = "raspberrypi,rpi-poe-power-supply";
+				firmware = <&firmware>;
+				status = "okay";
+			};
+		};
+	};
+};