added openlane config files

openlane/user_adder/config.json

diff --git a/openlane/user_adder/config.json b/openlane/user_adder/config.json
new file mode 100644
index 0000000..dae1f7c
--- /dev/null
+++ b/openlane/user_adder/config.json
@@ -0,0 +1,21 @@
+{
+    "PDK"                      : "sky130A",
+    "STD_CELL_LIBRARY"         : "sky130_fd_sc_hd",
+    "CARAVEL_ROOT"             : "../../caravel",
+    "CLOCK_NET"                : "counter.clk",
+    "CLOCK_PERIOD"             : "10",
+    "CLOCK_PORT"               : "wb_clk_i",
+    "DESIGN_IS_CORE"           : "0",
+    "DESIGN_NAME"              : "user_adder",
+    "DIE_AREA"                 : "0 0 900 600",
+    "DIODE_INSERTION_STRATEGY" : "4",
+    "FP_PIN_ORDER_CFG"         : "pin_order.cfg",
+    "FP_SIZING"                : "absolute",
+    "GLB_RT_MAXLAYER"          : "5",
+    "GND_NETS"                 : "vssd1",
+    "PL_BASIC_PLACEMENT"       : "1",
+    "PL_TARGET_DENSITY"        : "0.05",
+    "RUN_CVC"                  : "1",
+    "VDD_NETS"                 : "vccd1",
+    "VERILOG_FILES"            : ["../../caravel/verilog/rtl/defines.v", "../../verilog/rtl/user_adder.v"]
+}

openlane/user_adder/config.tcl

diff --git a/openlane/user_adder/config.tcl b/openlane/user_adder/config.tcl
new file mode 100755
index 0000000..1fa5dd8
--- /dev/null
+++ b/openlane/user_adder/config.tcl
@@ -0,0 +1,56 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
+set ::env(PDK) "sky130A"
+set ::env(STD_CELL_LIBRARY) "sky130_fd_sc_hd"
+
+set script_dir [file dirname [file normalize [info script]]]
+
+set ::env(DESIGN_NAME) user_adder
+
+set ::env(VERILOG_FILES) "\
+	$::env(CARAVEL_ROOT)/verilog/rtl/defines.v \
+	$script_dir/../../verilog/rtl/user_adder.v"
+
+set ::env(DESIGN_IS_CORE) 0
+
+set ::env(CLOCK_PORT) "wb_clk_i"
+set ::env(CLOCK_NET) "counter.clk"
+set ::env(CLOCK_PERIOD) "10"
+
+set ::env(FP_SIZING) absolute
+set ::env(DIE_AREA) "0 0 900 600"
+
+set ::env(FP_PIN_ORDER_CFG) $script_dir/pin_order.cfg
+
+set ::env(PL_BASIC_PLACEMENT) 1
+set ::env(PL_TARGET_DENSITY) 0.05
+
+# Maximum layer used for routing is metal 4.
+# This is because this macro will be inserted in a top level (user_project_wrapper) 
+# where the PDN is planned on metal 5. So, to avoid having shorts between routes
+# in this macro and the top level metal 5 stripes, we have to restrict routes to metal4.  
+# 
+# set ::env(GLB_RT_MAXLAYER) 5
+
+set ::env(RT_MAX_LAYER) {met4}
+
+# You can draw more power domains if you need to 
+set ::env(VDD_NETS) [list {vccd1}]
+set ::env(GND_NETS) [list {vssd1}]
+
+set ::env(DIODE_INSERTION_STRATEGY) 4 
+# If you're going to use multiple power domains, then disable cvc run.
+set ::env(RUN_CVC) 1

openlane/user_adder/pin_order.cfg

diff --git a/openlane/user_adder/pin_order.cfg b/openlane/user_adder/pin_order.cfg
new file mode 100644
index 0000000..2fda806
--- /dev/null
+++ b/openlane/user_adder/pin_order.cfg
@@ -0,0 +1,10 @@
+#BUS_SORT
+
+#S
+wb_.*
+wbs_.*
+la_.*
+irq.*
+
+#N
+io_.*