linux-kernel - [PATCH v1 1/4] arm64: dts: freescale: imx8mp-toradex-smarc: add fan PWM configuration

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Message-Id: <20250429113119.124427-2-francesco@dolcini.it>
Date: Tue, 29 Apr 2025 13:31:16 +0200
From: Francesco Dolcini <francesco@...cini.it>
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>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>
Cc: Francesco Dolcini <francesco.dolcini@...adex.com>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/4] arm64: dts: freescale: imx8mp-toradex-smarc: add fan PWM configuration

From: Francesco Dolcini <francesco.dolcini@...adex.com>

Configure correctly the FAN pwm output (inverted).

Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
 .../boot/dts/freescale/imx8mp-toradex-smarc-dev.dts      | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts
index 581f221323b7..55b8c5c14fb4 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts
@@ -3,6 +3,8 @@
 
 /dts-v1/;
 
+#include <dt-bindings/pwm/pwm.h>
+
 #include "imx8mp-toradex-smarc.dtsi"
 
 / {
@@ -205,9 +207,14 @@ &i2c6 {
 	status = "okay";
 
 	/* Fan controller */
-	fan@18 {
+	fan_controller: fan@18 {
 		compatible = "ti,amc6821";
 		reg = <0x18>;
+		#pwm-cells = <2>;
+
+		fan {
+			pwms = <&fan_controller 40000 PWM_POLARITY_INVERTED>;
+		};
 	};
 
 	/* Current measurement into module VDD */
-- 
2.39.5