Index: kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c
===================================================================
--- kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c	(revision b1c43bd94fa65c0a81ae171a8d0bbcb9935543ea)
+++ kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c	(revision 43cd4995323e5ad59552104e19f2a501c05c51d4)
@@ -185,4 +185,5 @@
 		amdm37x_uart_input_wire(&beagleboard.uart, srln);
 	}
+	amdm37x_irc_enable(beagleboard.irc_addr, AMDM37x_UART3_IRQ);
 }