Sysfs was used to control GPIOs on Linux system with the GPIOs defined in /sys/class/gpio, but starting with Linux 4.8, a new GPIO interface for user space was introduced, with gpiochip becoming char ...

rust-gpio-cdev is a Rust library/crate providing access to GPIO character device ABI. This API, stabilized with Linux v4.4, deprecates the legacy sysfs interface to GPIOs that is planned to be removed ...