diff --git a/GNUmakefile.am b/GNUmakefile.am
index 86bcb39..a734e9d 100644
--- a/GNUmakefile.am
+++ b/GNUmakefile.am
@@ -60,6 +60,11 @@ mcp251xfd_dump_SOURCES = \
 	mcp251xfd/mcp251xfd-regmap.c \
 	mcp251xfd/mcp251xfd.h
 
+EXTRA_DIST += \
+	mcp251xfd/99-devcoredump.rules \
+	mcp251xfd/devcoredump \
+	mcp251xfd/mcp251xfd-gen-testdata.sh
+
 bin_PROGRAMS = \
 	asc2log \
 	bcmserver \
@@ -106,9 +111,7 @@ EXTRA_DIST += \
 	autogen.sh \
 	can-j1939-kickstart.md \
 	can-j1939.md \
-	can-tc-init-etf.sh \
-	mcp251xfd/99-devcoredump.rules \
-	mcp251xfd/devcoredump
+	can-tc-init-etf.sh
 
 MAINTAINERCLEANFILES = \
 	configure \
diff --git a/mcp251xfd/mcp251xfd-gen-testdata.sh b/mcp251xfd/mcp251xfd-gen-testdata.sh
new file mode 100755
index 0000000..3f57a71
--- /dev/null
+++ b/mcp251xfd/mcp251xfd-gen-testdata.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2023 Pengutronix,
+#               Marc Kleine-Budde <kernel@pengutronix.de>
+
+set -x
+set -e
+
+DEV=${1:-can0}
+SPI=${2:-$(ethtool -i ${DEV}|sed -ne "s/bus-info: //p")}
+
+modprobe -r mcp251xfd
+modprobe mcp251xfd
+
+sleep 2
+
+ip link set ${DEV} down
+
+sleep 2
+rm -vf /var/log/devcoredump-*.dump
+
+ip link set ${DEV} up type can bitrate 1000000 dbitrate 4000000 fd on restart-ms 1000 berr-reporting off listen-only off loopback on
+
+ethtool -g ${DEV} || true
+ethtool -c ${DEV} || true
+
+cangen ${DEV} -Di -L8 -I2 -p 10 -g 200 -n 3
+
+cat /sys/kernel/debug/regmap/${SPI}-crc/registers > data/registers-canfd.dump
+
+ip link set ${DEV} down
+sleep 2
+cp -av /var/log/devcoredump-*.dump data
+
+
+ip link set ${DEV} up type can bitrate 1000000 fd off restart-ms 1000 berr-reporting off listen-only off loopback on
+
+rm -vf /var/log/devcoredump-*.dump
+
+ethtool -g ${DEV} || true
+ethtool -c ${DEV} || true
+
+cangen ${DEV} -Di -L8 -I2 -p 10 -g 200 -n 7
+
+cat /sys/kernel/debug/regmap/${SPI}-crc/registers > data/registers-classic-can.dump
+
+ip link set ${DEV} down
+sleep 2
+cp -av /var/log/devcoredump-*.dump data