openlane: update config file

- disable ir drop report for gf180
- update padding variable names
- set min global routing layer to Metal2 to avoid pin access issues at drt

gf180mcu/openlane/config.tcl

diff --git a/gf180mcu/openlane/config.tcl b/gf180mcu/openlane/config.tcl
index 3fd391e..e24cf22 100644
--- a/gf180mcu/openlane/config.tcl
+++ b/gf180mcu/openlane/config.tcl
@@ -78,8 +78,9 @@
 
 ## Extra PDN configs
 
-### OpenROAD Bug
-set ::env(FP_PDN_IRDROP) 0
+### OpenROAD/tlef Bug
+## via resistance are missing from the tlef causing irdrop to fai
+set ::env(RUN_IRDROP_REPORT) 0
 
 set ::env(FP_PDN_RAIL_OFFSET) 0
 set ::env(FP_PDN_VWIDTH) 1.6
@@ -102,8 +103,9 @@
 
 # Routing
 set ::env(METAL_LAYER_NAMES) "Metal1 Metal2 Metal3 Metal4 Metal5"
-set ::env(RT_MIN_LAYER) "Metal1"
+set ::env(RT_MIN_LAYER) "Metal2"
 set ::env(RT_MAX_LAYER) "Metal5"
+set ::env(DRT_MIN_LAYER) "Metal1"
 set ::env(GRT_LAYER_ADJUSTMENTS) "0,0,0,0,0"
 
 ## Tracks info
@@ -138,4 +140,4 @@
 #     Via1 4.500,\
 #     Via2 4.500,\
 #     Via3 4.500,\
-#     Via4 4.500"
\ No newline at end of file
+#     Via4 4.500"

gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl

diff --git a/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl b/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl
index 09ffd1f..386c72f 100644
--- a/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl
+++ b/gf180mcu/openlane/gf180mcu_fd_sc_mcu7t5v0/config.tcl
@@ -36,7 +36,6 @@
 set ::env(DIODE_CELL_PIN) "I"
 set ::env(DIODE_INSERTION_STRATEGY) {4}
 
-set ::env(CELL_PAD) 2
 set ::env(CELL_PAD_EXCLUDE) "$::env(STD_CELL_LIBRARY)__filltie_* $::env(STD_CELL_LIBRARY)__filldecap_* $::env(STD_CELL_LIBRARY)__fill_* $::env(STD_CELL_LIBRARY)__endcap_*"
 
 # TritonCTS configurations
@@ -49,3 +48,6 @@
 # The library maximum transition is 8.9ns; setting it to lower value
 set ::env(DEFAULT_MAX_TRAN) 3
 
+set ::env(GPL_CELL_PADDING) {0}
+set ::env(DPL_CELL_PADDING) {2}
+