diff --git a/.gitmodules b/.gitmodules
index e69de29..b57c2f5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "libs/pico-pio-hirsute"]
+	path = libs/pico-pio-hirsute
+	url = Gitea:liz/pico-pio-hirsute.git
diff --git a/libs/pico-pio-hirsute b/libs/pico-pio-hirsute
new file mode 160000
index 0000000..ef91c5d
--- /dev/null
+++ b/libs/pico-pio-hirsute
@@ -0,0 +1 @@
+Subproject commit ef91c5d3696e5bf453a8f4508eec9b0fa60073bb