diff --git a/gen_i2c_callouts.pl b/gen_i2c_callouts.pl
new file mode 100755
index 0000000..587c86f
--- /dev/null
+++ b/gen_i2c_callouts.pl
@@ -0,0 +1,77 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+
+
+use mrw::Targets;
+use mrw::Inventory;
+use mrw::Util;
+use Getopt::Long;
+
+
+my $mrwFile = "";
+my $outFile = "";
+
+
+GetOptions(
+"m=s" => \$mrwFile,
+"o=s" => \$outFile,
+)
+or printUsage();
+
+
+if (($mrwFile eq "") or ($outFile eq ""))
+{
+    printUsage();
+}
+
+
+# Load system MRW
+my $targets = Targets->new;
+$targets->loadXML($mrwFile);
+
+
+# Load inventory
+my @inventory = Inventory::getInventory($targets);
+
+
+open(my $fh, '>', $outFile) or die "Could not open file '$outFile' $!";
+
+
+my $bmc = Util::getBMCTarget($targets);
+my $connections = $targets->findConnections($bmc, "I2C");
+# hash of arrays - {I2C master port : list of connected slave Targets}
+my %masters;
+
+for my $i2c (@{$connections->{CONN}})
+{
+    my $master = $i2c->{SOURCE};
+    my $port = $targets->getAttribute($master,"I2C_PORT");
+    $port = Util::adjustI2CPort($port);
+    my $slave = $i2c->{DEST};
+    push(@{$masters{$port}}, $slave);
+}
+
+for my $m (keys %masters)
+{
+    print $fh $m.":\n";
+    for my $s(@{$masters{$m}})
+    {
+        my $addr = $targets->getAttribute($s,"I2C_ADDRESS");
+        $addr = Util::adjustI2CAddress(hex($addr));
+        print $fh "    ".$addr.": ";
+        my $fru = Util::getEnclosingFru($targets, $s);
+        print $fh Util::getObmcName(\@inventory, $fru)."\n";
+    }
+}
+
+
+close $fh;
+
+
+sub printUsage
+{
+    print "
+    $0 -m [MRW file] -o [Output filename]\n";
+    exit(1);
+}