diff --git a/.gitmodules b/.gitmodules
index 1fefa13f0..2cf9c66e0 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -112,3 +112,6 @@
 [submodule "lib/sct_neopixel"]
 	path = lib/sct_neopixel
 	url = https://github.com/gsteiert/sct_neopixel
+[submodule "hw/mcu/raspberrypi/pico-sdk"]
+	path = hw/mcu/raspberrypi/pico-sdk
+	url = https://github.com/raspberrypi/pico-sdk.git
diff --git a/hw/mcu/raspberrypi/pico-sdk b/hw/mcu/raspberrypi/pico-sdk
new file mode 160000
index 000000000..ef38b746e
--- /dev/null
+++ b/hw/mcu/raspberrypi/pico-sdk
@@ -0,0 +1 @@
+Subproject commit ef38b746efaeb0aa1354406198a76da29302aada