From 07d76600a3c59e01430c9a793dc646941be423b9 Mon Sep 17 00:00:00 2001
From: Loic Poulain <loic.poulain@oss.qualcomm.com>
Date: Tue, 9 Jun 2026 11:12:06 +0200
Subject: [PATCH] arm64: dts: qcom: monaco-arduino-monza: Add fan controller
 and thermal cooling

Enable the CCI1 bus and add support for the Microchip EMC2305 fan
controller on the Monaco Arduino Monza board. The controller is
virtually implemented by the onboard MCU.

Add a new active trip point to the cpuss0 thermal zone and
associate it with onboard fan cooling. The CPU subsystem sensor is
used as the thermal reference until support for a more appropriate
onboard/skin sensor becomes available (via spmi-adc5-gen3).

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260609091206.522331-1-loic.poulain@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
---
 .../boot/dts/qcom/monaco-arduino-monza.dts    | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts b/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
index 8b3ed73feb6e..46ce0722f98f 100644
--- a/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
+++ b/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
@@ -7,6 +7,7 @@
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/pwm/pwm.h>
 #include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h>
 
 #include "monaco.dtsi"
@@ -172,6 +173,26 @@
 	};
 };
 
+&cci1 {
+	status = "okay";
+};
+
+&cci1_i2c1 {
+	fan_controller: fan-controller@2f {
+		compatible = "microchip,emc2305";
+		reg = <0x2f>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		#pwm-cells = <3>;
+
+		fan: fan@0 {
+			reg = <0x0>;
+			pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>;
+			#cooling-cells = <2>;
+		};
+	};
+};
+
 &ethernet0 {
 	phy-mode = "2500base-x";
 	phy-handle = <&hsgmii_phy0>;
@@ -425,6 +446,27 @@
 	reset-gpios = <&tlmm 23 GPIO_ACTIVE_LOW>;
 };
 
+&thermal_zones {
+	cpuss-0-0-thermal {
+		polling-delay = <2000>;
+
+		trips {
+			cpuss0_active: cpuss-active {
+				temperature = <32000>;
+				hysteresis = <2000>;
+				type = "active";
+			};
+		};
+
+		cooling-maps {
+			map-active {
+				trip = <&cpuss0_active>;
+				cooling-device = <&fan 0 THERMAL_NO_LIMIT>;
+			};
+		};
+	};
+};
+
 &tlmm {
 	pcie0_default_state: pcie0-default-state {
 		wake-pins {