easytarget-MQ-Pro-IO/device-tree

Rebuild dts tree fo MQ pro..

see: https://manpages.ubuntu.com/manpages/focal/man1/dtc.1.html https://forum.armbian.com/topic/29626-mango-pi-mq-pro-d1-device-tree-try-to-okay-serial/ https://github.com/torvalds/linux/tree/master/arch/riscv/boot/dts/allwinner

d2589d8211/MangoPi/linux/arch/riscv/boot/dts/allwinner

version from official armbian image? 329e94f16f/arch/riscv/dts

Notes for re-generating MQ PRO device tree (.dtb)

My notes

• By default the Device Tree compiler (/usr/bin/dtc) should already be installed, as should the linux-headers for the kernel.

compile the mq-pro dts with the current kernel headers

Example here is against the 'default' 6.8.0-31 linux kernel from the Ubuntu 24.04 release

• clean the dtspp folder: rm dtspp/*
• edit and run bake.sh to precompile the files against the latest linux-headers
• cd into the dtspp folder and run: dtc sun20i-d1-mangopi-mq-pro.dts > dtb-6.8.0-31-mqpro modify the version to reflect the current headers
• move the .dtb file into the /boot folder: sudo mv dtb-6.8.0-31-mqpro /boot/dtbs
• make a link in /boot to this: sudo ln -s dtbs/dtb-6.8.0-31-mqpro /boot/dtb-mqpro

Set up Grub to test boot the new DTB

Initially we will test the new dtb:

• backup the grub config: sudo cp /etc/grub/grub.cfg /etc/grub/grub.cfg.generic-dtb
• sudo vi /etc/grub/grub.cfg (or use nano if you prefer) Find the 1st menuentry section (the default Ubuntu one) and edit the devicetree line to look like: devicetree /boot/dtb-mqpro
• Reboot (sudo reboot) (remember the mq-pro is sloooow to reboot ;-) )
• If the reboot fails you can either attach a serial adapter to the GPIO pins and select the fallback kernel from the advanced options menu, and then restore the grub config backup once logged in. Or (if no serial available) remove the SD card, mount it on another computer and restore the file there.

Check that we have the correct device tree

dtc -I fs /sys/firmware/devicetree/base | grep 'model'

• ignore all the 'not a phandle reference' warnings
• you should see model = "MangoPi MQ Pro" at the end

Make this permanent in grub

ToDo

Issues

No HDMI output - this is either a blocker.. or fine for a headless system

Bonus

The onboard (blue) status LED can be controlled via the sys tree: sudo sh -c "echo 1 > /sys/devices/platform/leds/leds/blue\:status/brightness" to turn on sudo sh -c "echo 1 > /sys/devices/platform/leds/leds/blue\:status/brightness" to turn off You can make it flash as wifi traffic is seen with: sudo sh -c "echo phy0rx > /sys/devices/platform/leds/leds/blue\:status/trigger"