Is there documentation of the PDN creation anywhere? I'm looking at examples in the Caravel design that create their own pdn.tcl script. Is there an overview of the requirements for this?

@Matthew Guthaus OpenROAD has a good documentation on the

pdn.tcl

syntax here https://github.com/The-OpenROAD-Project/OpenROAD/blob/master/src/pdngen/doc/PDN.md. Openlane has a file called

common_pdn.tcl

which automates the PDN generation based on a number of variables and the documentation for that is here https://github.com/efabless/openlane/blob/a95f56dac367c05bc48b4a001c419b58ec9648a4/docs/source/hardening_macros.md#power-grid-pdn