add genet update script

devices/genet/update.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+if [ $# -ne 3 ]; then
+    echo "Need 3 arguments: 1) kernel source dir, 2) previous version, 3) version to add"
+    exit 1
+fi
+
+KERNELDIR=$1
+PREVER=$2
+KERNELVER=$3
+
+GENETDIR=drivers/net/ethernet/broadcom/genet
+
+FILES="bcmgenet.c bcmgenet.h bcmgenet_wol.c bcmmii.c"
+
+for f in $FILES; do
+    echo $f
+    o=${f/\./-$KERNELVER-orig.}
+    e=${f/\./-$KERNELVER-ethercat.}
+    cp -v $KERNELDIR/$GENETDIR/$f $o
+    chmod 644 $o
+    cp -v $o $e
+    op=${f/\./-$PREVER-orig.}
+    ep=${f/\./-$PREVER-ethercat.}
+    diff -up $op $ep | patch -p1 --no-backup-if-mismatch $e
+    sed -i s/$PREVER-ethercat.h/$KERNELVER-ethercat.h/ $e
+    git add $o $e
+    echo -e "\t$e \\" >> Makefile.am
+    echo -e "\t$o \\" >> Makefile.am
+done
+
+cp $KERNELDIR/$GENETDIR/../unimac.h unimac-$KERNELVER-orig.h
+cp $KERNELDIR/$GENETDIR/../unimac.h unimac-$KERNELVER-ethercat.h
+git add unimac-$KERNELVER-orig.h unimac-$KERNELVER-ethercat.h
+echo -e "\tunimac-$KERNELVER-ethercat.h \\" >> Makefile.am
+echo -e "\tunimac-$KERNELVER-orig.h \\" >> Makefile.am
+
+echo "Don't forget to update Makefile.am!"