linux-kernel - [PATCH 7/7] arm64: dts: imx95-19x19-evk: add pwm fan control

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Date: Thu, 27 Jun 2024 18:00:01 -0400
From: Frank Li <Frank.Li@....com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	imx@...ts.linux.dev (open list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 7/7] arm64: dts: imx95-19x19-evk: add pwm fan control

Add pwm fan and overwrite default thermal nodes.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 .../boot/dts/freescale/imx95-19x19-evk.dts    | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
index ed8921d6217b8..0c84efd058ce1 100644
--- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts
@@ -5,6 +5,7 @@
 
 /dts-v1/;
 
+#include <dt-bindings/pwm/pwm.h>
 #include "imx95.dtsi"
 
 / {
@@ -31,6 +32,13 @@ memory@...00000 {
 		reg = <0x0 0x80000000 0 0x80000000>;
 	};
 
+	fan0: pwm-fan {
+		compatible = "pwm-fan";
+		#cooling-cells = <2>;
+		pwms = <&tpm6 2 4000000 PWM_POLARITY_INVERTED>;
+		cooling-levels = <64 128 192 255>;
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -558,3 +566,44 @@ IMX95_PAD_SD2_VSELECT__USDHC2_VSELECT		0x51e
 		>;
 	};
 };
+
+&thermal_zones {
+	a55-thermal {
+		trips {
+			atrip2: trip2 {
+				temperature = <55000>;
+				hysteresis = <2000>;
+				type = "active";
+			};
+
+			atrip3: trip3 {
+				temperature = <65000>;
+				hysteresis = <2000>;
+				type = "active";
+			};
+
+			atrip4: trip4 {
+				temperature = <75000>;
+				hysteresis = <2000>;
+				type = "active";
+			};
+		};
+
+		cooling-maps {
+			map1 {
+				trip = <&atrip2>;
+				cooling-device = <&fan0 0 1>;
+			};
+
+			map2 {
+				trip = <&atrip3>;
+				cooling-device = <&fan0 1 2>;
+			};
+
+			map3 {
+				trip = <&atrip4>;
+				cooling-device = <&fan0 2 3>;
+			};
+		};
+	};
+};
-- 
2.34.1