From 2cf6db15ecd5d1d96158c5bba5543ba38f8387f7 Mon Sep 17 00:00:00 2001
From: Igor Pecovnik <igor.pecovnik@gmail.com>
Date: Tue, 4 Aug 2020 23:20:03 +0200
Subject: [PATCH] Add fan support to Odroid N2/plus

Signed-off-by: Igor Pecovnik <igor.pecovnik@gmail.com>
---
 .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
index 65df5fb49..50bfb0dce 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
@@ -2,6 +2,7 @@
 /*
  * Copyright (c) 2019 BayLibre, SAS
  * Author: Neil Armstrong <narmstrong@baylibre.com>
+ * Changed: Igor Pecovnik <igor@armbian.com>
  */
 
 /dts-v1/;
@@ -10,6 +11,7 @@
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/gpio/meson-g12a-gpio.h>
 #include <dt-bindings/sound/meson-g12a-tohdmitx.h>
+#include <dt-bindings/pwm/pwm.h>
 
 / {
 	compatible = "hardkernel,odroid-n2", "amlogic,s922x", "amlogic,g12b";
@@ -27,6 +29,22 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	pwmgpio:pwmgpio {
+		compatible = "pwm-gpio";
+		#pwm-cells = <3>;
+		pwm-gpios = <&gpio_ao GPIOAO_10 GPIO_ACTIVE_HIGH>;
+		status = "okay";
+	};
+
+	pwmfan:pwm-fan {
+		compatible = "pwm-fan";
+		pwms = <&pwmgpio 0 40000 PWM_POLARITY_INVERTED>;
+		cooling-min-state = <0>;
+		cooling-max-state = <3>;
+		#cooling-cells = <2>;
+		cooling-levels = <0 120 170 220>;
+	};
+
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x0 0x0 0x40000000>;
@@ -342,6 +360,16 @@ cpu_passive: cpu-passive {
 			hysteresis = <2000>; /* millicelsius */
 			type = "passive";
 		};
+		fan_0: trip-point@0 {
+			temperature = <65000>;
+			hysteresis = <5000>;
+			type = "active";
+		};
+		fan_1: trip-point@1 {
+			temperature = <75000>;
+			hysteresis = <5000>;
+			type = "active";
+		};
 	};
 	cooling-maps {
 		cpufreq_map0 {
@@ -356,6 +384,14 @@ cpufreq_map1 {
 					 <&cpu102 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 					 <&cpu103 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
 		};
+		fan_cooling_map0 {
+			trip = <&fan_0>;
+			cooling-device = <&pwmfan THERMAL_NO_LIMIT 2>;
+		};
+		fan_cooling_map1 {
+			trip = <&fan_1>;
+			cooling-device = <&pwmfan 2 THERMAL_NO_LIMIT>;
+		};
 	};
 };
 
-- 
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