Add initial custom layer properties.

compiler/modules/wordline_buffer_array.py

@@ -7,10 +7,11 @@
 #
 import debug
 import design
-from tech import drc, layer
+from tech import layer
 from vector import vector
 from sram_factory import factory
 from globals import OPTS
+from tech import layer_properties as layer_props
 
 
 class wordline_buffer_array(design.design):
@@ -70,7 +71,7 @@ class wordline_buffer_array(design.design):
         Add a pin for each row of vdd/gnd which
         are must-connects next level up.
         """
-        if OPTS.tech_name == "sky130":
+        if layer_props.wordline_buffer_array.vertical_supply:
             for name in ["vdd", "gnd"]:
                 supply_pins = self.wld_inst[0].get_pins(name)
                 for pin in supply_pins: