tree a312a4fe0d44d70facab638cea6655b2eaf557db
parent 075cfd7bbb090dc7b463be90425e039b66498687
author Tim 'mithro' Ansell <me@mith.ro> 1603984359 -0700
committer Tim 'mithro' Ansell <tansell@google.com> 1603984359 -0700

lef: Fixing VNB/VPB properties in .magic.lef files.

Both the `PIN VNB` and `PIN VPB` are now marked with `DIRECTION INOUT`.
The `PIN VNB` is marked with `USE GROUND` and the `PIN VPB` is marked
with `USE POWER`.

This should fix the `.magic.lef` file usage with OpenROAD (and hopefully other
tools too).

Fixes https://github.com/google/skywater-pdk/issues/172

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>