diff --git a/.gitmodules b/.gitmodules
index 51f0b9a..3096f1e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "src/terminal"]
 	path = src/terminal
 	url = https://git.tiband.de/riscv/terminal.git
+[submodule "sd-breakout"]
+	path = sd-breakout
+	url = https://git.tiband.de/riscv/sd-breakout.git
diff --git a/sd-breakout b/sd-breakout
new file mode 160000
index 0000000..2323183
--- /dev/null
+++ b/sd-breakout
@@ -0,0 +1 @@
+Subproject commit 232318397967b9bfc16eb1148ef0320885fd3b09