M4COREDUMP: add service to enable coredump via remoteproc

Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>
Change-Id: I6d5c1ca745fb2598f1937fa261a6fe5432d7f204

recipes-extended/m4coredump/files/st-m4coredump.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=ST Enable M4 firmware coredump
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/sbin/stm32mp-coredump-sysfs.sh start
+ExecStop=/sbin/stm32mp-coredump-sysfs.sh stop
+
+[Install]
+WantedBy=sysinit.target

recipes-extended/m4coredump/files/stm32mp-coredump-sysfs.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+case $1 in
+start)
+    echo enabled >/sys/class/remoteproc/remoteproc0/coredump
+    ;;
+stop)
+    echo disabled >/sys/class/remoteproc/remoteproc0/coredump
+    ;;
+
+*)
+    echo "$0 [start|stop]"
+    echo "Start/Stop M4 Fwirmware coredump."
+    ;;
+esac
+

recipes-extended/m4coredump/m4fwcoredump.bb

@@ -8,10 +8,15 @@ DEPENDS = "udev"
 SRC_URI = " \
     file://85-m4-dump.rules \
     file://stm32mp-m4fwdump.sh \
+    \
+    file://stm32mp-coredump-sysfs.sh \
+    file://st-m4coredump.service \
     "
 
 S = "${WORKDIR}"
 
+inherit systemd
+
 do_install() {
     install -D -p -m0644 ${WORKDIR}/85-m4-dump.rules \
         ${D}${sysconfdir}/udev/rules.d/85-m4-dump.rules
@@ -21,4 +26,12 @@ do_install() {
 
     sed -i -e "s:#BINDIR#:${sbindir}:g" \
               ${D}${sysconfdir}/udev/rules.d/85-m4-dump.rules
+
+    if ${@bb.utils.contains('DISTRO_FEATURES','systemd','true','false',d)}; then
+        install -d ${D}${systemd_unitdir}/system
+        install -d ${D}${base_sbindir}
+        install -m 644 ${WORKDIR}/st-m4coredump.service ${D}${systemd_unitdir}/system/
+        install -m 755 ${WORKDIR}/stm32mp-coredump-sysfs.sh ${D}${base_sbindir}/
+    fi
 }
+FILES_${PN} += "${systemd_unitdir}/system"