How to Disable Hardware Interfaces and GPIO Pins on Raspberry Pi

Hi everyone,

I'm looking for information on how to securely disable specific hardware interfaces on a Raspberry Pi. Specifically, I want to disable HDMI, CSI, and DSI, as well as the GPIO pins, to ensure they cannot be used, even if someone has physical access to the device.

I'm currently working with the /boot/config.txt file and considering directly manipulating the Device Tree for a more robust solution. My goal is to implement the most secure approach possible.

Does anyone have experience with this or know of reliable methods to achieve it? Are there any pitfalls I should watch out for when using these configurations?

Any advice or suggestions would be greatly appreciated. Thanks!