update documentation on the depth option for fabric hierarchy writer
@@ -108,6 +108,8 @@ Setup OpenFPGA
- ``--file`` or ``-f`` Specify the file name to write the hierarchy.
+ - ``--depth`` Specify at which depth of the fabric module graph should the writer stop outputting. The root module start from depth 0. For example, if you want a two-level hierarchy, you should specify depth as 1.
+
- ``--verbose`` Show verbose log
.. note:: This file is designed for hierarchical PnR flow, which requires the tree of Multiple-Instanced-Blocks (MIBs).
