linuxptp: new package

Add the Linux PTP Project package.
http://linuxptp.sourceforge.net/

The SysV and systemd init scripts start the daemon in slave-only mode on eth0
and synchronize the system clock to PTP.

Signed-off-by: Petr Kulhavy <brain@jikos.cz>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

DEVELOPERS

@@ -1292,6 +1292,9 @@ F:	package/sdl2_gfx/
 F:	package/sdl2_image/
 F:	package/sdl2_ttf/
 
+N:	Petr Kulhavy <brain@jikos.cz>
+F:	package/linuxptp/
+
 N:	Petr Vorel <petr.vorel@gmail.com>
 F:	package/linux-backports/
 F:	package/ltp-testsuite/

package/Config.in

@@ -1609,6 +1609,7 @@ menu "Networking applications"
 	source "package/links/Config.in"
 	source "package/linphone/Config.in"
 	source "package/linux-zigbee/Config.in"
+	source "package/linuxptp/Config.in"
 	source "package/lldpd/Config.in"
 	source "package/lrzsz/Config.in"
 	source "package/macchanger/Config.in"

package/linuxptp/Config.in

@@ -0,0 +1,13 @@
+config BR2_PACKAGE_LINUXPTP
+	bool "linuxptp"
+	help
+	  The Linux PTP Project is the Precision Time Protocol
+	  implementation according to IEEE standard 1588 for Linux.
+
+	  The dual design goals are to provide a robust implementation
+	  of the standard and to use the most relevant and modern
+	  Application Programming Interfaces (API) offered by the
+	  Linux kernel. Supporting legacy APIs and other platforms is
+	  not a goal.
+
+	  http://linuxptp.sourceforge.net/

package/linuxptp/S65linuxptp

@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# Start linuxptp
+#
+
+start() {
+	printf "Starting linuxptp daemon: "
+	start-stop-daemon -S -b -q -p /var/run/linuxptp-ptp4l.pid \
+		-x /usr/sbin/ptp4l -- -f /etc/linuxptp.cfg
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+
+	printf "Starting linuxptp system clock synchronization: "
+	start-stop-daemon -S -b -q -p /var/run/linuxptp-phc2sys.pid \
+		-x /usr/sbin/phc2sys -- -s eth0 -c CLOCK_REALTIME -w -S 1.0
+	[ $? = 0 ] && echo "OK" || echo "FAIL"
+}
+
+stop() {
+	printf "Stopping linuxptp system clock synchronization: "
+	start-stop-daemon -K -q -p /var/run/linuxptp-phc2sys.pid \
+		-x /usr/sbin/phc2sys
+	echo "OK"
+
+	printf "Stopping linuxptp daemon: "
+	start-stop-daemon -K -q -p /var/run/linuxptp-ptp4l.pid \
+		-x /usr/sbin/ptp4l
+	echo "OK"
+}
+
+case "$1" in
+  start)
+	start
+	;;
+  stop)
+	stop
+	;;
+  restart|reload)
+	stop
+	start
+	;;
+  *)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+esac
+
+exit $?

package/linuxptp/linuxptp-system-clock.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Precision Time Protocol system clock synchronization
+After=syslog.target network.target
+
+[Service]
+ExecStart=/usr/sbin/phc2sys -s /dev/ptp0 -c CLOCK_REALTIME -w -S 1.0
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
+WantedBy=linuxptp.service

package/linuxptp/linuxptp.cfg

@@ -0,0 +1,19 @@
+# LinuxPTP configuration file for synchronizing the system clock to
+# a remote PTP master in slave-only mode.
+#
+# By default synchronize time in slave-only mode using UDP and hardware time
+# stamps on eth0. If the difference to master is >1.0 second correct by
+# stepping the clock instead of adjusting the frequency.
+#
+# If you change the configuration don't forget to update the phc2sys
+# parameters accordingly in linuxptp-system-clock.service (systemd)
+# or the linuxptp SysV init script.
+
+[global]
+slaveOnly		1
+delay_mechanism		Auto
+network_transport	UDPv4
+time_stamping		hardware
+step_threshold		1.0
+
+[eth0]

package/linuxptp/linuxptp.hash

@@ -0,0 +1,2 @@
+# Locally computed:
+sha256	b8190ab71a99f1dc32847f33cb301d2464d3f9e5f4c51300d55589aff42e8b3f  linuxptp-97c351cafd7327fd28047580c9e2528a6f7e742b.tar.gz

package/linuxptp/linuxptp.mk

@@ -0,0 +1,43 @@
+################################################################################
+#
+# linuxptp
+#
+################################################################################
+
+LINUXPTP_VERSION = 97c351cafd7327fd28047580c9e2528a6f7e742b
+LINUXPTP_SITE_METHOD = git
+LINUXPTP_SITE = git://git.code.sf.net/p/linuxptp/code
+LINUXPTP_LICENSE = GPL-2.0+
+LINUXPTP_LICENSE_FILES = COPYING
+
+define LINUXPTP_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) KBUILD_OUTPUT=$(TARGET_DIR) \
+		EXTRA_CFLAGS="$(TARGET_CFLAGS)" EXTRA_LDFLAGS="$(TARGET_LDFLAGS)" \
+		CC="$(TARGET_CC)" \
+		-C $(@D) all
+endef
+
+define LINUXPTP_INSTALL_TARGET_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) prefix=/usr DESTDIR=$(TARGET_DIR) \
+		$(TARGET_CONFIGURE_OPTS) -C $(@D) install
+
+	$(INSTALL) -D -m 644 $(LINUXPTP_PKGDIR)/linuxptp.cfg \
+		$(TARGET_DIR)/etc/linuxptp.cfg
+endef
+
+define LINUXPTP_INSTALL_INIT_SYSV
+	$(INSTALL) -m 755 -D $(LINUXPTP_PKGDIR)/S65linuxptp \
+		$(TARGET_DIR)/etc/init.d/S65linuxptp
+endef
+
+define LINUXPTP_INSTALL_INIT_SYSTEMD
+	$(INSTALL) -D -m 644 $(LINUXPTP_PKGDIR)/linuxptp.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/linuxptp.service
+	$(INSTALL) -D -m 644 $(LINUXPTP_PKGDIR)/linuxptp-system-clock.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/linuxptp-system-clock.service
+	mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
+	ln -sf ../../../../usr/lib/systemd/system/linuxptp.service \
+		$(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/linuxptp.service
+endef
+
+$(eval $(generic-package))

package/linuxptp/linuxptp.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Precision Time Protocol daemon
+After=syslog.target network.target
+Wants=linuxptp-system-clock.service
+
+[Service]
+ExecStart=/usr/sbin/ptp4l -f /etc/linuxptp.cfg
+Restart=always
+
+[Install]
+WantedBy=multi-user.target