It seems -t and -r option is available for your spidev_test tool.
You can simply run the following commands to verify.
$ echo 55 55 55 55 55 55 55 55 > pattern8.txt
$ sudo ./spidev_test -D /dev/spidev0.0 -s8000000 -g8 -b8 -H -f pattern8.txt -n1 -zzz -r
$ sudo ./spidev_test -D /dev/spidev2.0 -s8000000 -g8 -b8 -H -f pattern8.txt -n1 -zzz -t