[PATCH] arm: dts: bcm2711: Add emc2301 to the CM4 IO board

Peter Robinson pbrobinson at gmail.com
Thu Sep 24 23:54:10 PDT 2026


The CM4 IO carrier board has a emc2301 fan controller. Add
it so it can be used on the CM4 board.

Signed-off-by: Peter Robinson <pbrobinson at gmail.com>
---
 arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
index 8e45de01d2ad1..4f81fbdb85b56 100644
--- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
+++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4-io.dts
@@ -107,6 +107,20 @@ &genet {
 };
 
 &i2c0_1 {
+	emc2301: fan-controller at 2f {
+		compatible = "microchip,emc2301", "microchip,emc2305";
+		reg = <0x2f>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		#pwm-cells = <3>;
+
+		fan at 0 {
+			reg = <0x0>;
+			pwms = <&emc2301 26000 0 1>;
+			#cooling-cells = <2>;
+		};
+	};
+
 	pcf85063: rtc at 51 {
 		/* Attention: An alarm resets the machine */
 		compatible = "nxp,pcf85063a";
-- 
2.55.0




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