linuxptp: add systemd services

Add systemd services phc2sys@.service and ptp4l@.service,
these services are taken from the Ubuntu/Debian linuxptp
package.

Update the recipe to install them when needed using the
systemd bbclass, the services are disabled by default.

Signed-off-by: Luca Fancellu <luca.fancellu@arm.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-connectivity/linuxptp/linuxptp/systemd/phc2sys@.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Synchronize system clock or PTP hardware clock (PHC)
+Documentation=man:phc2sys
+Requires=ptp4l.service
+After=ptp4l.service
+Before=time-sync.target
+
+[Service]
+Type=simple
+ExecStart=/usr/sbin/phc2sys -w -s %I
+
+[Install]
+WantedBy=multi-user.target

meta-oe/recipes-connectivity/linuxptp/linuxptp/systemd/ptp4l@.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Precision Time Protocol (PTP) service for %I
+Documentation=man:ptp4l
+After=sys-subsystem-net-devices-%i.device
+
+[Service]
+Type=simple
+ExecStart=/usr/sbin/ptp4l -f /etc/linuxptp/ptp4l.conf -i %I
+
+[Install]
+WantedBy=multi-user.target

meta-oe/recipes-connectivity/linuxptp/linuxptp_4.1.bb

@@ -11,11 +11,15 @@ SRC_URI = "${LINUXPTP_SRC_URI}/files/v4.1/linuxptp-${PV}.tgz \
            file://build-Allow-CC-and-prefix-to-be-overriden.patch \
            file://Use-cross-cpp-in-incdefs.patch \
            file://0001-include-string.h-for-strncpy.patch \
+           file://systemd/phc2sys@.service \
+           file://systemd/ptp4l@.service \
            "
 
 SRC_URI[md5sum] = "1db8699fc155965341759be5e5aad938"
 SRC_URI[sha256sum] = "e1743d44f8208897e30895da3579e670ff919b914feb4b5a949f3e421ddde535"
 
+inherit systemd
+
 UPSTREAM_CHECK_URI = "${LINUXPTP_SRC_URI}/files/"
 UPSTREAM_CHECK_REGEX = "(?P<pver>\d+(\.\d+)+)/"
 
@@ -23,6 +27,8 @@ EXTRA_OEMAKE = "ARCH=${TARGET_ARCH} EXTRA_CFLAGS='${CFLAGS}' mandir=${mandir}"
 
 export KBUILD_OUTPUT="${RECIPE_SYSROOT}"
 
+LINUXPTP_SYSTEMD_SERVICES = "phc2sys@.service ptp4l@.service"
+
 do_install() {
     oe_runmake install DESTDIR=${D} prefix=${prefix}
 
@@ -35,8 +41,18 @@ do_install() {
     install -d ${D}/${sysconfdir}/linuxptp/
     install -m 644 ${S}/configs/default.cfg \
         ${D}${sysconfdir}/linuxptp/ptp4l.conf
+
+    # Install systemd services
+    install -d ${D}/${systemd_unitdir}/system/
+    for service in ${LINUXPTP_SYSTEMD_SERVICES}; do
+        install -m 644 ${WORKDIR}/systemd/$service \
+            ${D}/${systemd_unitdir}/system/$service
+    done
 }
 
+SYSTEMD_SERVICE:${PN} = "${LINUXPTP_SYSTEMD_SERVICES}"
+SYSTEMD_AUTO_ENABLE:${PN} = "disable"
+
 PACKAGES =+ "${PN}-configs"
 
 FILES:${PN}-configs += "${docdir}"