meta-digi-dey: Add acpid support for power key suspend/poweroff.

The acpid applet will run at startup and will listen for power input
events.

On arrival, it will timestamp the press event, wait for the release event
and decide whether to suspend or poweroff based on the time elapsed.

https://jira.digi.com/browse/DEL-34

Signed-off-by: Alex Gonzalez <alex.gonzalez@digi.com>

meta-digi-dey/recipes-core/busybox/busybox-1.20.2/acpid.map

@@ -0,0 +1,2 @@
+EV_KEY  0x01    KEY_POWER       116     1       pswitch-press
+EV_KEY  0x01    KEY_POWER       116     0       pswitch-release

meta-digi-dey/recipes-core/busybox/busybox-1.20.2/busybox-acpid

@@ -0,0 +1,39 @@
+#!/bin/sh
+DAEMON=/sbin/acpid
+NAME=acpid
+DESC="Busybox ACPI daemon."
+ARGS="-M /etc/acpi/acpid.map"
+
+test -f $DAEMON || exit 0
+
+set -e
+
+case "$1" in
+    start)
+        echo -n "starting $DESC: $NAME... "
+    start-stop-daemon -S -b -n $NAME -a $DAEMON -- $ARGS
+    echo "done."
+    ;;
+    stop)
+        echo -n "stopping $DESC: $NAME... "
+    start-stop-daemon -K -n $NAME
+    echo "done."
+    ;;
+    restart)
+        echo -n "restarting $DESC: $NAME... "
+    $0 stop
+    $0 start
+    echo "done."
+    ;;
+    reload)
+        echo -n "reloading $DESC: $NAME... "
+        killall -HUP $(basename ${DAEMON})
+    echo "done."
+    ;;
+    *)
+    echo "Usage: $0 {start|stop|restart|reload}"
+    exit 1
+    ;;
+esac
+
+exit 0

meta-digi-dey/recipes-core/busybox/busybox-1.20.2/pswitch-press

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+if [ -f  /tmp/pswitch_press ]; then
+    logger -t acpid  "Bogus press event, removing."
+    rm -f /tmp/pswitch_press
+fi
+
+echo `date +%s` > /tmp/pswitch_press
+exit 0

meta-digi-dey/recipes-core/busybox/busybox-1.20.2/pswitch-release

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+POWEROFF_DELAY=2
+
+if [ ! -f  /tmp/pswitch_press ]; then
+    logger -t acpid  "No press event."
+    exit -1
+fi
+
+while read line
+do
+    TSTAMP=$line
+done < /tmp/pswitch_press
+
+rm -f /tmp/pswitch_press
+
+TDIFF=$((`date +%s`- $TSTAMP))
+if [ $TDIFF -lt $POWEROFF_DELAY  ]; then
+    logger -t acpid  "Power key suspend request."
+    exec /bin/suspend
+else
+    logger -t acpid  "Power key poweroff request."
+    exec /sbin/poweroff
+fi
+
+exit 0

meta-digi-dey/recipes-core/busybox/busybox_1.20.2.bbappend

@@ -19,6 +19,10 @@ SRC_URI += "file://0001-del-baudrates.patch \
             file://busybox-ntpd \
             file://index.html \
             file://digi.gif \
+            file://busybox-acpid \
+            file://acpid.map \
+            file://pswitch-press \
+            file://pswitch-release \
            "
 
 # Add device handlers to 'mdev' package
@@ -42,6 +46,16 @@ FILES_${PN}-ntpd = "${sysconfdir}/init.d/busybox-ntpd"
 INITSCRIPT_PACKAGES =+ "${PN}-ntpd"
 INITSCRIPT_NAME_${PN}-ntpd = "busybox-ntpd"
 
+# ACPID package
+PACKAGES =+ "${PN}-acpid"
+FILES_${PN}-acpid = " ${sysconfdir}/init.d/busybox-acpid \
+                       ${sysconfdir}/acpi/acpid.map \
+                       ${sysconfdir}/acpi/pswitch-press \
+                       ${sysconfdir}/acpi/pswitch-release \
+"
+INITSCRIPT_PACKAGES =+ "${PN}-acpid"
+INITSCRIPT_NAME_${PN}-acpid = "busybox-acpid"
+
 do_install_append() {
 	if grep "CONFIG_MDEV=y" ${WORKDIR}/defconfig; then
 		if grep "CONFIG_FEATURE_MDEV_CONF=y" ${WORKDIR}/defconfig; then
@@ -65,4 +79,11 @@ do_install_append() {
 	fi
 	# Install 'suspend' script
 	install -m 0755 ${WORKDIR}/suspend ${D}${base_bindir}
+	if grep "CONFIG_ACPID=y" ${WORKDIR}/defconfig; then
+		install -m 0755 ${WORKDIR}/busybox-acpid ${D}${sysconfdir}/init.d/
+		install -d ${D}${sysconfdir}/acpi/
+		install -m 0755 ${WORKDIR}/acpid.map ${D}${sysconfdir}/acpi/
+		install -m 0755 ${WORKDIR}/pswitch-press ${D}${sysconfdir}/acpi/
+		install -m 0755 ${WORKDIR}/pswitch-release ${D}${sysconfdir}/acpi/
+	fi
 }

meta-digi-dey/recipes-core/packagegroups/packagegroup-dey-core.bb

@@ -47,6 +47,7 @@ RDEPENDS_${PN} = "\
     ubootenv \
     update-flash \
     usbutils \
+    busybox-acpid \
     ${MACHINE_ESSENTIAL_EXTRA_RDEPENDS}"
 
 RRECOMMENDS_${PN} = "\