[openlane] set default cell pad to 4

sky130/openlane/sky130_fd_sc_hd/config.tcl

diff --git a/sky130/openlane/sky130_fd_sc_hd/config.tcl b/sky130/openlane/sky130_fd_sc_hd/config.tcl
index 25c5b9c..38a9336 100755
--- a/sky130/openlane/sky130_fd_sc_hd/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hd/config.tcl
@@ -50,7 +50,7 @@
 set ::env(FAKEDIODE_CELL) "sky130_ef_sc_hd__fakediode_2"
 set ::env(DIODE_CELL_PIN) "DIODE"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXCLUDE) "sky130_fd_sc_hd__tap* sky130_fd_sc_hd__decap* sky130_fd_sc_hd__fill*"
 
 # Clk Buffers info CTS data

sky130/openlane/sky130_fd_sc_hdll/config.tcl

diff --git a/sky130/openlane/sky130_fd_sc_hdll/config.tcl b/sky130/openlane/sky130_fd_sc_hdll/config.tcl
index e3a6213..97e4ece 100755
--- a/sky130/openlane/sky130_fd_sc_hdll/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hdll/config.tcl
@@ -50,7 +50,7 @@
 set ::env(FAKEDIODE_CELL) "sky130_fd_sc_hdll__fakediode_2"
 set ::env(DIODE_CELL_PIN) "DIODE"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXCLUDE) "$::env(STD_CELL_LIBRARY)__tap* $::env(STD_CELL_LIBRARY)__decap* $::env(STD_CELL_LIBRARY)__fill*"
 
 # Clk Buffers info CTS data

sky130/openlane/sky130_fd_sc_hs/config.tcl

diff --git a/sky130/openlane/sky130_fd_sc_hs/config.tcl b/sky130/openlane/sky130_fd_sc_hs/config.tcl
index 6d1b9ba..7b190de 100755
--- a/sky130/openlane/sky130_fd_sc_hs/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hs/config.tcl
@@ -48,7 +48,7 @@
 set ::env(DIODE_CELL) "sky130_fd_sc_hs__diode_2"
 set ::env(DIODE_CELL_PIN) "DIODE"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXCLUDE) "sky130_fd_sc_hs__tap* sky130_fd_sc_hs__decap* sky130_fd_sc_hs__fill*"
 
 set ::env(ROOT_CLK_BUFFER) sky130_fd_sc_hs__clkbuf_16

sky130/openlane/sky130_fd_sc_hvl/config.tcl

diff --git a/sky130/openlane/sky130_fd_sc_hvl/config.tcl b/sky130/openlane/sky130_fd_sc_hvl/config.tcl
index 2e261dd..dc55bae 100644
--- a/sky130/openlane/sky130_fd_sc_hvl/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hvl/config.tcl
@@ -55,7 +55,7 @@
 set ::env(DIODE_CELL) "sky130_fd_sc_hvl__diode_2"
 set ::env(DIODE_CELL_PIN) "DIODE"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXCLUDE) "sky130_fd_sc_hvl__tap* sky130_fd_sc_hvl__decap* sky130_fd_sc_hvl__fill*"
 
 # Clk Buffers info CTS data

sky130/openlane/sky130_fd_sc_ls/config.tcl

diff --git a/sky130/openlane/sky130_fd_sc_ls/config.tcl b/sky130/openlane/sky130_fd_sc_ls/config.tcl
index 0c3a101..50dfb80 100755
--- a/sky130/openlane/sky130_fd_sc_ls/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_ls/config.tcl
@@ -50,7 +50,7 @@
 set ::env(FAKEDIODE_CELL) "sky130_fd_sc_ls__fakediode_2"
 set ::env(DIODE_CELL_PIN) "DIODE"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXCLUDE) "$::env(STD_CELL_LIBRARY)__tap* $::env(STD_CELL_LIBRARY)__decap* $::env(STD_CELL_LIBRARY)__fill*"
 
 # Clk Buffers info CTS data

sky130/openlane/sky130_fd_sc_ms/config.tcl

diff --git a/sky130/openlane/sky130_fd_sc_ms/config.tcl b/sky130/openlane/sky130_fd_sc_ms/config.tcl
index 7b00a53..2da0733 100755
--- a/sky130/openlane/sky130_fd_sc_ms/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_ms/config.tcl
@@ -49,7 +49,7 @@
 set ::env(DIODE_CELL) "sky130_fd_sc_ms__diode_2"
 set ::env(DIODE_CELL_PIN) "DIODE"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXCLUDE) "$::env(STD_CELL_LIBRARY)__tap* $::env(STD_CELL_LIBRARY)__decap* $::env(STD_CELL_LIBRARY)__fill*"
 
 # Clk Buffers info CTS data

sky130/openlane/sky130_osu_sc_t18/config.tcl

diff --git a/sky130/openlane/sky130_osu_sc_t18/config.tcl b/sky130/openlane/sky130_osu_sc_t18/config.tcl
index 1e5ac36..eb9753c 100755
--- a/sky130/openlane/sky130_osu_sc_t18/config.tcl
+++ b/sky130/openlane/sky130_osu_sc_t18/config.tcl
@@ -56,7 +56,7 @@
 #set ::env(FAKEDIODE_CELL) "sky130_osu_sc_t18__fakediode_2"
 set ::env(DIODE_CELL_PIN) "A"
 
-set ::env(CELL_PAD) 8
+set ::env(CELL_PAD) 4
 set ::env(CELL_PAD_EXECLUDE) "FILLX*"
 
 # Clk Buffers info CTS data