Hardware Reference
In-Depth Information
Discussion
In Linux, interfaces to everything are turned into files. Although not everything is docu-
mented, you can learn more about the interfaces the kernel provides by checking out the
ABI documentation
.
For example, the LED interface is documented in the
ABI/testing/
sysfs-class-led file
.
This documentation is part of the Linux kernel source tree, so you
might find updates within the source tree of your particular kernel version.
The source tree for the kernel used in this topic is located at
https://github.com/beagle-
