diff --git a/platform/at91sam7/mux.c b/platform/at91sam7/mux.c
new file mode 100644
index 0000000..7c9d9a6
--- /dev/null
+++ b/platform/at91sam7/mux.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <platform/at91sam7.h>
+#include <platform/mux.h>
+
+void mux_init(void)
+{
+	AT91PIO *pio = AT91PIOA_ADDR;
+
+	pio->output_disable = BOARD_OUTPUT_DISABLE;
+	pio->output_enable = BOARD_OUTPUT_ENABLE;
+	pio->pullup_disable = BOARD_PULLUP_DISABLE;
+	pio->pullup_enable = BOARD_PULLUP_ENABLE;
+	pio->pio_disable = BOARD_PIO_DISABLE;
+	pio->pio_enable = BOARD_PIO_ENABLE;
+	pio->select_a = BOARD_SELECT_A;
+	pio->select_b = BOARD_SELECT_B;
+}
+