RTEMS C User's Guide
The rtems_io_register directive associates a name with the
specified device (i.e. major/minor number pair). Device names
are typically registered as part of the device driver
initialization sequence. The rtems_io_lookup
directive is used to
determine the major/minor number pair associated with the
specified device name. The use of these directives frees the
application from being dependent on the arbitrary assignment of
major numbers in a particular application. No device naming
conventions are dictated by RTEMS.
RTEMS C User's Guide
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