diff --git a/.gitmodules b/.gitmodules
index e69de29bb..5b2a14da5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "yosys"]
+	path = yosys
+	url = https://github.com/YosysHQ/yosys
diff --git a/yosys b/yosys
new file mode 160000
index 000000000..f44a4f908
--- /dev/null
+++ b/yosys
@@ -0,0 +1 @@
+Subproject commit f44a4f90867b49837da048f9055fdcd8a13c335b