diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..714620c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "u-boot-brain"]
+	path = u-boot-brain
+	url = git@github.com:puhitaku/u-boot-brain.git
+[submodule "linux-brain"]
+	path = linux-brain
+	url = git@github.com:puhitaku/linux-brain.git
diff --git a/linux-brain b/linux-brain
new file mode 160000
index 0000000..19c30d3
--- /dev/null
+++ b/linux-brain
@@ -0,0 +1 @@
+Subproject commit 19c30d3b372dd5226e31ba195f2b22e18214dfe9
diff --git a/u-boot-brain b/u-boot-brain
new file mode 160000
index 0000000..c2eed72
--- /dev/null
+++ b/u-boot-brain
@@ -0,0 +1 @@
+Subproject commit c2eed725184db90164760faca9cfb1e78de437d5