diff --git a/meta-digi-arm/recipes-core/udev/udev-extraconf/99-ext-rtc-wakeup.rules b/meta-digi-arm/recipes-core/udev/udev-extraconf/99-ext-rtc-wakeup.rules
new file mode 100644
index 000000000..8c60b0a81
--- /dev/null
+++ b/meta-digi-arm/recipes-core/udev/udev-extraconf/99-ext-rtc-wakeup.rules
@@ -0,0 +1,3 @@
+# Enable external RTC as a wakeup source
+SUBSYSTEM=="platform", KERNEL=="5c009000.i2c", ACTION=="add", ATTRS{power/wakeup}=="disabled", RUN+="/bin/sh -c 'echo enabled > /sys/devices/platform/soc/5c009000.i2c/power/wakeup'"
+SUBSYSTEM=="platform", KERNEL=="40013000.i2c", ACTION=="add", ATTRS{power/wakeup}=="disabled", RUN+="/bin/sh -c 'echo enabled > /sys/devices/platform/soc/40013000.i2c/power/wakeup'"
diff --git a/meta-digi-arm/recipes-core/udev/udev-extraconf_1.1.bbappend b/meta-digi-arm/recipes-core/udev/udev-extraconf_1.1.bbappend
index b667e9b1a..a5e8f2b21 100644
--- a/meta-digi-arm/recipes-core/udev/udev-extraconf_1.1.bbappend
+++ b/meta-digi-arm/recipes-core/udev/udev-extraconf_1.1.bbappend
@@ -7,6 +7,9 @@ SRC_URI += " \
     file://81-spi-spidev.rules \
     file://blacklist.conf \
 "
+SRC_URI:append:ccmp1 = " \
+    file://99-ext-rtc-wakeup.rules \
+"
 
 do_install:append() {
 
@@ -49,6 +52,10 @@ do_install:append() {
 	fi
 }
 
+do_install:append:ccmp1() {
+	install -m 0644 ${WORKDIR}/99-ext-rtc-wakup.rules ${D}${sysconfdir}/udev/rules.d/
+}
+
 FILES:${PN}:append = " ${sysconfdir}/modprobe.d"
 FILES:${PN}:append = " /mnt"