% uname -sr
FreeBSD 11.0-RELEASE-p9
% dtc --version
Version: DTC 1.4.0
% dtc --help
Usage: dtc [options] <input file>

Options: -[qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv]
  -q, --quiet
    Quiet: -q suppress warnings, -qq errors, -qqq all
  -I, --in-format <arg>
    Input formats are:
        dts - device tree source text
        dtb - device tree blob
        fs  - /proc/device-tree style directory
  -o, --out <arg>
    Output file
  -O, --out-format <arg>
    Output formats are:
        dts - device tree source text
        dtb - device tree blob
        asm - assembler source
  -V, --out-version <arg>
    Blob version to produce, defaults to %d (for dtb and asm output)
  -d, --out-dependency <arg>
    Output dependency file
  -R, --reserve <arg>
    tMake space for <number> reserve map entries (for dtb and asm output)
  -S, --space <arg>
    Make the blob at least <bytes> long (extra space)
  -p, --pad <arg>
    Add padding to the blob of <bytes> long (extra space)
  -b, --boot-cpu <arg>
    Set the physical boot cpu
  -f, --force
    Try to produce output even if the input tree has errors
  -i, --include <arg>
    Add a path to search for include files
  -s, --sort
    Sort nodes and properties before outputting (useful for comparing trees)
  -H, --phandle <arg>
    Valid phandle formats are:
        legacy - "linux,phandle" properties only
        epapr  - "phandle" properties only
        both   - Both "linux,phandle" and "phandle" properties
  -W, --warning <arg>
    Enable/disable warnings (prefix with "no-")
  -E, --error <arg>
    Enable/disable errors (prefix with "no-")
  -h, --help
    Print this help and exit
  -v, --version
    Print version and exit
%

% uname -sr
FreeBSD 12.0-CURRENT
% dtc -v
Version: dtc 0.5.0 compatible with gpl dtc 1.4.0
% dtc -h
Usage:
        dtc     [-fhsv@] [-b boot_cpu_id] [-d dependency_file][-E [no-]checker_name]
                [-H phandle_format] [-I input_format][-O output_format]
                [-o output_file] [-R entries] [-S bytes] [-p bytes][-V blob_version]
                -W [no-]checker_name] input_file
%