How to use user defined power nets in ORFS flow

[vijayank88]

Hello OR Team,

In OpenLane flow following option used for power net definition.

set ::env(VDD_NETS) [list {vccd1} {vccd2} {vdda1} {vdda2}]
set ::env(GND_NETS) [list {vssd1} {vssd2} {vssa1} {vssa2}]

In ORFS flow by default I see from

OpenROAD-flow-scripts/flow/platforms/sky130hd/pdn.cfg

Line 13 in 8739eef

set ::power_nets "VDD"

set ::power_nets "VDD"
set ::ground_nets "VSS"

Is there any option to over-write power net definition, so that accordingly PDN created?

[maliberty]

You could define PDN_TCL or PDN_CFG but you'll have to replace the whole file. Alternatively you could modify pdn.cfg to be configurable and make a PR.