DEVICE_ADD(9)                     Device drivers infrastructure                     DEVICE_ADD(9)



NAME
       device_add - add device to device hierarchy.

SYNOPSIS
       int device_add(struct device * dev);

ARGUMENTS
       dev
           device.

DESCRIPTION
       This is part 2 of device_register, though may be called separately _iff_ device_initialize
       has been called separately.

       This adds dev to the kobject hierarchy via kobject_add, adds it to the global and sibling
       lists for the device, then adds it to the other relevant subsystems of the driver model.

       Do not call this routine or device_register more than once for any device structure. The
       driver model core is not designed to work with devices that get unregistered and then
       spring back to life. (Among other things, it's very hard to guarantee that all references
       to the previous incarnation of dev have been dropped.) Allocate and register a fresh new
       struct device instead.

NOTE
       _Never_ directly free dev after calling this function, even if it returned an error!
       Always use put_device to give up your reference instead.

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