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Radxa 25W PoE Hat

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At least for legacy kernels, it possible to use Radxa's overlay for the 25W PoE hat.

 

This should allow you to use the PWM fan on the PoE hat.

 

#!/bin/bash

# Install linux headers
apt-get install -y linux-headers-legacy-rk35xx

# Download and compile the device tree overlay
h=/usr/src/linux-headers-$(uname -r)
wget https://raw.githubusercontent.com/radxa/overlays/f2679399887b678dec62cb50cb44c767a2bcb293/arch/arm64/boot/dts/rockchip/overlays/rock-5b-radxa-25w-poe.dts
cpp -nostdinc -I $h/include -I $h/arch  -undef -x assembler-with-cpp rock-5b-radxa-25w-poe.dts |
	dtc -I dts -O dtb -o rock-5b-radxa-25w-poe.dtbo

# Install device tree overlay

mkdir -p /boot/overlay-user
mv rock-5b-radxa-25w-poe.dtbo /boot/overlay-user
echo 'user_overlays=rock-5b-radxa-25w-poe' >>/boot/armbianEnv.txt

 

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