simple sysfs mod

Description

This has been created on the purpose of education.

This is not the complete literature and code sample about creating sysfs files.

But, I believe this will help someone to learn how to control sysfs files.

Build

$ make
$ sudo insmod simple_sysfs_mod.ko

Literature

https://github.com/torvalds/linux/blob/1b39eacdbdff16bae0e2ca56b3b2a3c1b4b08143/drivers/iio/dummy/iio_dummy_evgen.c

https://www.kernel.org/doc/ols/2005/ols2005v1-pages-321-334.pdf