diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..659fe763f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "yosys"]
+	path = yosys
+	url = https://github.com/YosysHQ/yosys.git
diff --git a/yosys b/yosys
new file mode 160000
index 000000000..ec410c9b1
--- /dev/null
+++ b/yosys
@@ -0,0 +1 @@
+Subproject commit ec410c9b1934c5c06ad6f71e60f2337fabe5b055