These devices have a strange support in Linux, that is, they are fully managed by the sysfs interface and no special files are present in the
/dev directory as usual.
In reality, there is another communication method between the 1-Wire core and the user space, which is not covered in this book. You can get further information by reading the
Documentation/w1/w1.netlink file in the kernel's repository.
For each master, there exists a dedicated directory (as seen earlier) where several files are located, and this directory can be used to set up our controller. Here is an example from the controller emulated earlier:
root@bbb:~# ls /sys/bus/w1/devices/w1_bus_master1/ 00-800000000000 w1_master_attempts w1_master_search driver ...