Merge branch 'enable-uart'.

This is posted as ninjablocks#10.

Author: hlapp

init/arduino-uart-enable.conf

@@ -0,0 +1,33 @@
+description	"Ensure needed UARTs are enabled"
+author      "Hilmar Lapp <hlapp@drycafe.net>"
+
+start on filesystem and runlevel [2345]
+
+task
+
+script
+    if [ -z "$ARDUINO_UART" ] ; then
+        ARDUINO_UART=1
+    fi
+    if [ ! -c /dev/ttyO$ARDUINO_UART ] ; then
+        . /etc/default/rcS
+        . /etc/environment.local
+        if [ "$NINJA_HARDWARE_TYPE" = "BBB" ]; then
+            capemgr=/sys/devices/bone_capemgr.9
+            if [ ! -d $capemgr ] ; then
+                capemgr=/sys/devices/platform/bone_capemgr
+            fi
+            /bin/echo BB-UART$ARDUINO_UART > $capemgr/slots
+        fi
+    fi
+end script
+
+pre-start script
+    if [ -f /etc/environment.local ]; then
+        . /etc/environment.local
+    fi
+    if [ -z "$NINJA_HARDWARE_TYPE" ]; then
+        /opt/utilities/bin/detect-hw-os
+        . /etc/environment.local
+    fi
+end script