SUBSYS_SYSTEM_REGIST(9)           Device drivers infrastructure           SUBSYS_SYSTEM_REGIST(9)



NAME
       subsys_system_register - register a subsystem at /sys/devices/system/

SYNOPSIS
       int subsys_system_register(struct bus_type * subsys,
                                  const struct attribute_group ** groups);

ARGUMENTS
       subsys
           system subsystem

       groups
           default attributes for the root device

DESCRIPTION
       All 'system' subsystems have a /sys/devices/system/<name> root device with the name of the
       subsystem. The root device can carry subsystem- wide attributes. All registered devices
       are below this single root device and are named after the subsystem with a simple
       enumeration number appended. The registered devices are not explicitly named; only 'id' in
       the device needs to be set.

       Do not use this interface for anything new, it exists for compatibility with bad ideas
       only. New subsystems should use plain subsystems; and add the subsystem-wide attributes
       should be added to the subsystem directory itself and not some create fake root-device
       placed in /sys/devices/system/<name>.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   SUBSYS_SYSTEM_REGIST(9)