Device Tree • Re: CM4 move overlay apply logic to u-boot

I can't help you with the U-boot side of things, but there are multiple ways to apply overlays offline:
1. dtmerge (https://github.com/raspberrypi/utils/tr ... er/dtmerge)

dtmerge is a tool for applying pre-compiled overlays (*.dtbo files) to a base Device Tree file (*.dtb).

The same underlying library is used in the firmware.

2. ovmerge (https://github.com/raspberrypi/utils/tr ... er/dtmerge)

ovmerge is tool for merging DT overlay source files (*-overlay.dts), flattening and sorting .dts files for easy comparison, displaying the include tree, etc.

This is useful for seeing the effects of overlay parameters, combining overlays, etc.

I'm responsible for both of them, and I'm happy to answer questions.

Statistics: Posted by PhilE — Thu May 08, 2025 4:30 pm

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