FDT is used at run time in 6 crates (of which 4 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) FDT version
290 3 ostd ^0.1.5
270 hermit-kernel ^0.1
syscon-rs ^0.1.4
qemu-fw-cfg dev ^0.1.3