'\" t
.\" Title: subsys_system_register
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1
.\" Date: January 2017
.\" Manual: Device drivers infrastructure
.\" Source: Kernel Hackers Manual 4.8.15
.\" Language: English
.\"
.TH "SUBSYS_SYSTEM_REGIST" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Device drivers infrastructure"
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.SH "NAME"
subsys_system_register \- register a subsystem at /sys/devices/system/
.SH "SYNOPSIS"
.HP \w'int\ subsys_system_register('u
.BI "int subsys_system_register(struct\ bus_type\ *\ " "subsys" ", const\ struct\ attribute_group\ **\ " "groups" ");"
.SH "ARGUMENTS"
.PP
\fIsubsys\fR
.RS 4
system subsystem
.RE
.PP
\fIgroups\fR
.RS 4
default attributes for the root device
.RE
.SH "DESCRIPTION"
.PP
All \*(Aqsystem\*(Aq subsystems have a /sys/devices/system/ 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 \*(Aqid\*(Aq in the device needs to be set\&.
.PP
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/\&.
.SH "COPYRIGHT"
.br