This will work on Raspberry Pi OS 2021-01-12 (related DT files were changed in later release).
Copy the binary device tree overlay file to /boot/overlays/
:
sudo cp ov7251cam0.dtbo /boot/overlays/ov7251cam0.dtbo
Enable the overlay in boot/config.txt
:
dtoverlay=ov7251cam0
Reboot the RPi with sudo reboot
. The camera driver should run.
To compile the device tree from source use dts
:
dtc -I dts -O dtb -o ov7251cam0.dtbo ov7251cam0-overlay.dts
Link to base overlay file: ov7251-overlay.dts.
https://gist.github.com/kralo/5e489247d23dd13f4564fd6baa443416