linux-kernel - [PATCH] arm64: dts: imx8mp-phyboard-pollux-rdk: add gpio-fan

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Message-ID: <20240924-wip-y-moog-phytec-de-phyboard-pollux-fan-v1-1-9ea6ec43f27b@phytec.de>
Date: Tue, 24 Sep 2024 09:53:04 +0200
From: Yannic Moog <y.moog@...tec.de>
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>
CC: <devicetree@...r.kernel.org>, <imx@...ts.linux.dev>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<upstream@...ts.phytec.de>, Yannic Moog <y.moog@...tec.de>
Subject: [PATCH] arm64: dts: imx8mp-phyboard-pollux-rdk: add gpio-fan

A GPIO fan may be connected to Pollux fan header. The fan should
activate at 60°C and stay active until critical SoC temperature is
reached and the board shuts down.

Signed-off-by: Yannic Moog <y.moog@...tec.de>
---
 .../dts/freescale/imx8mp-phyboard-pollux-rdk.dts   | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
index 50debe821c42..9b551a50533f 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-phyboard-pollux-rdk.dts
@@ -9,6 +9,7 @@
 #include <dt-bindings/phy/phy-imx8-pcie.h>
 #include <dt-bindings/leds/leds-pca9532.h>
 #include <dt-bindings/pwm/pwm.h>
+#include <dt-bindings/thermal/thermal.h>
 #include "imx8mp-phycore-som.dtsi"
 
 / {
@@ -32,6 +33,16 @@ backlight_lvds: backlight {
 		pwms = <&pwm3 0 50000 0>;
 	};
 
+	fan0: fan {
+		compatible = "gpio-fan";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_fan>;
+		gpio-fan,speed-map = <0     0
+				      13000 1>;
+		gpios = <&gpio5 4 GPIO_ACTIVE_HIGH>;
+		#cooling-cells = <2>;
+	};
+
 	panel1_lvds: panel-lvds {
 		compatible = "edt,etml1010g3dra";
 		backlight = <&backlight_lvds>;
@@ -111,6 +122,25 @@ reg_vcc_3v3_sw: regulator-vcc-3v3-sw {
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 	};
+
+	thermal-zones {
+		soc-thermal {
+			trips {
+				active1: trip2 {
+					temperature = <60000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+			};
+
+			cooling-maps {
+				map1 {
+					trip = <&active1>;
+					cooling-device = <&fan0 1 THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+	};
 };
 
 /* TPM */
@@ -377,6 +407,12 @@ MX8MP_IOMUXC_SAI1_MCLK__GPIO4_IO20			0x10
 		>;
 	};
 
+	pinctrl_fan: fan0grp {
+		fsl,pins = <
+			MX8MP_IOMUXC_SPDIF_RX__GPIO5_IO04       0x16
+		>;
+	};
+
 	pinctrl_flexcan1: flexcan1grp {
 		fsl,pins = <
 			MX8MP_IOMUXC_SAI5_RXD2__CAN1_RX		0x154

---
base-commit: 79e1b8171ca476abb9b8eceef81cd1b6f58b75e9
change-id: 20240920-wip-y-moog-phytec-de-phyboard-pollux-fan-0cd29d6d2b97

Best regards,
-- 
Yannic Moog <y.moog@...tec.de>