The driver was removed but 'make clean' still failed:
scripts/Makefile.clean:17:
[...]/drivers/staging/cs5535_gpio/Makefile: No such file or directory
make[3]: *** No rule to make target
`[...]/drivers/staging/cs5535_gpio/Makefile'. Stop.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>