openlane configs updates - introduced `PDN_RAIL_WIDTH` to replace the hardcoded 0.48 value in common_pdn.tcl and updated it for all variants. - Added CTS configs for HVL using normal buffers.

diff --git a/sky130/openlane/common_pdn.tcl b/sky130/openlane/common_pdn.tcl
index 872688a..4f52289 100644
--- a/sky130/openlane/common_pdn.tcl
+++ b/sky130/openlane/common_pdn.tcl

@@ -7,7 +7,7 @@
 pdngen::specify_grid stdcell {
     name grid
     rails {
-	    met1 {width 0.48 pitch $::env(PLACE_SITE_HEIGHT) offset 0}
+	    met1 {width $::env(PDN_RAIL_WIDTH) pitch $::env(PLACE_SITE_HEIGHT) offset 0}
     }
     straps {
 	    met4 {width 1.6 pitch $::env(FP_PDN_VPITCH) offset $::env(FP_PDN_VOFFSET)}

diff --git a/sky130/openlane/config.tcl b/sky130/openlane/config.tcl
index de727d3..60b1c08 100755
--- a/sky130/openlane/config.tcl
+++ b/sky130/openlane/config.tcl

@@ -33,6 +33,8 @@
 # CTS luts
 set ::env(CTS_TECH_DIR) "N/A"
 
+set ::env(CTS_SQR_CAP) 0.258e-3
+set ::env(CTS_SQR_RES) 0.125
 set ::env(FP_TAPCELL_DIST) 14
 
 # Tracks info

diff --git a/sky130/openlane/sky130_fd_sc_hd/config.tcl b/sky130/openlane/sky130_fd_sc_hd/config.tcl
index 739787a..0cc4fcd 100755
--- a/sky130/openlane/sky130_fd_sc_hd/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hd/config.tcl

@@ -63,3 +63,5 @@
 set ::env(CTS_SQR_CAP) 0.258e-3
 set ::env(CTS_SQR_RES) 0.125
 set ::env(CTS_MAX_CAP) 1.53169
+
+set ::env(PDN_RAIL_WIDTH) 0.48
\ No newline at end of file

diff --git a/sky130/openlane/sky130_fd_sc_hdll/config.tcl b/sky130/openlane/sky130_fd_sc_hdll/config.tcl
index 0435e79..96ae80d 100755
--- a/sky130/openlane/sky130_fd_sc_hdll/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hdll/config.tcl

@@ -66,3 +66,4 @@
 set ::env(CTS_SQR_CAP) 0.258e-3
 set ::env(CTS_SQR_RES) 0.125
 set ::env(CTS_MAX_CAP) 1.53169
+set ::env(PDN_RAIL_WIDTH) 0.48
\ No newline at end of file

diff --git a/sky130/openlane/sky130_fd_sc_hs/config.tcl b/sky130/openlane/sky130_fd_sc_hs/config.tcl
index fbd5ff2..2410086 100755
--- a/sky130/openlane/sky130_fd_sc_hs/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hs/config.tcl

@@ -62,3 +62,5 @@
 set ::env(CTS_SQR_CAP) 0.469e-3
 set ::env(CTS_SQR_RES) 0.125
 set ::env(CTS_MAX_CAP) 1.8894300000
+
+set ::env(PDN_RAIL_WIDTH) 0.48

diff --git a/sky130/openlane/sky130_fd_sc_hvl/config.tcl b/sky130/openlane/sky130_fd_sc_hvl/config.tcl
index 159b208..b8e18ff 100644
--- a/sky130/openlane/sky130_fd_sc_hvl/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_hvl/config.tcl

@@ -28,18 +28,18 @@
 set ::env(FP_ENDCAP_CELL) "sky130_fd_sc_hvl__decap_4"
 
 # defaults (can be overridden by designs):
-set ::env(SYNTH_DRIVING_CELL) "sky130_fd_sc_hvl_inv_16"
+set ::env(SYNTH_DRIVING_CELL) "sky130_fd_sc_hvl__inv_16"
 #capacitance : 0.017653;
 set ::env(SYNTH_DRIVING_CELL_PIN) "Y"
 # update these
-set ::env(SYNTH_CAP_LOAD) "70.77" ; # femtofarad __inv_8 pin A cap
+set ::env(SYNTH_CAP_LOAD) "35.49" ; # femtofarad __inv_8 pin A cap
 set ::env(SYNTH_MIN_BUF_PORT) "sky130_fd_sc_hvl__buf_1 A X"
 set ::env(SYNTH_TIEHI_PORT) "sky130_fd_sc_hvl__conb_1 HI"
 set ::env(SYNTH_TIELO_PORT) "sky130_fd_sc_hvl__conb_1 LO"
 
 # cts defaults
-set ::env(CTS_ROOT_BUFFER) ""
-#set ::env(CELL_CLK_PORT) CLK
+set ::env(CTS_ROOT_BUFFER) sky130_fd_sc_hvl__buf_16
+set ::env(CELL_CLK_PORT) CLK
 
 # Placement defaults
 set ::env(PL_LIB) $::env(LIB_TYPICAL)
@@ -58,4 +58,12 @@
 set ::env(CELL_PAD_EXECLUDE) "sky130_fd_sc_hvl__tap* sky130_fd_sc_hvl__decap* sky130_fd_sc_hvl__fill*"
 
 # Clk Buffers info CTS data
-set ::env(CLOCK_TREE_SYNTH) 0
+set ::env(ROOT_CLK_BUFFER) sky130_fd_sc_hvl__buf_16
+set ::env(CLK_BUFFER) sky130_fd_sc_hvl__buf_4
+set ::env(CLK_BUFFER_INPUT) A
+set ::env(CLK_BUFFER_OUTPUT) X
+
+set ::env(CTS_CLK_BUFFER_LIST) "sky130_fd_sc_hvl__buf_1 sky130_fd_sc_hvl__buf_2 sky130_fd_sc_hvl__buf_4 sky130_fd_sc_hvl__buf_8"
+set ::env(CTS_MAX_CAP) 5.57100
+
+set ::env(PDN_RAIL_WIDTH) 0.51

diff --git a/sky130/openlane/sky130_fd_sc_ls/config.tcl b/sky130/openlane/sky130_fd_sc_ls/config.tcl
index c5e0a75..59f17f5 100755
--- a/sky130/openlane/sky130_fd_sc_ls/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_ls/config.tcl

@@ -65,3 +65,5 @@
 set ::env(CTS_SQR_CAP) 0.258e-3
 set ::env(CTS_SQR_RES) 0.125
 set ::env(CTS_MAX_CAP) 1.53169
+
+set ::env(PDN_RAIL_WIDTH) 0.48

diff --git a/sky130/openlane/sky130_fd_sc_ms/config.tcl b/sky130/openlane/sky130_fd_sc_ms/config.tcl
index fbeb569..5a37229 100755
--- a/sky130/openlane/sky130_fd_sc_ms/config.tcl
+++ b/sky130/openlane/sky130_fd_sc_ms/config.tcl

@@ -66,3 +66,5 @@
 set ::env(CTS_SQR_CAP) 0.258e-3
 set ::env(CTS_SQR_RES) 0.125
 set ::env(CTS_MAX_CAP) 1.53169
+
+set ::env(PDN_RAIL_WIDTH) 0.48