a gpio driver for raspberry pi 4B with Broadcom 2711 as processor creates an lll-gpio-driver proc file in `/proc/lll-gpio-driver` and allows to control gpio pins with `<pin number> <1|0>`. this little file driver hasd been made following [low level learning channel](https://www.youtube.com/channel/UC6biysICWOJ-C3P4Tyeggzg) and his series of video (https://www.youtube.com/watch?v=lWzFFusYg6g)