CONFIG_ATTACH(9)	   Kernel Developer's Manual	      CONFIG_ATTACH(9)

NAME
     config_attach, config_detach, config_detach_children, config_deactivate
     attach and detach devices

SYNOPSIS
     #include <sys/param.h>
     #include <sys/device.h>

     struct device *
     config_attach(struct device *parent, void *cf, void *aux,
	 cfprint_t print);

     int
     config_detach(struct device *dev, int flags);

     int
     config_detach_children(struct device *parent, int flags);

     int
     config_deactivate(struct device *dev);

DESCRIPTION
     The config_attach() function attaches a found device.  Memory is
     allocated for the softc structure and the driver's attach function is
     called according to the configuration table.  If successful,
     config_attach() returns the softc.	 If unsuccessful, it returns NULL.

     The config_detach() function is called by the parent to detach the child
     device.  The second argument flags contains detachment flags:

     #define DETACH_FORCE    0x01    /* Force detachment; hardware gone */
     #define DETACH_QUIET    0x02    /* Don't print a notice */

     The config_deactivate() function is called by the parent to change the
     child device's operational state by calling the driver's activate
     function with a flags argument describing the targeted operational state:

     #define DVACT_DEACTIVATE	     1	     /* deactivate the device */
     #define DVACT_QUIESCE	     2	     /* warn the device about suspend */
     #define DVACT_SUSPEND	     3	     /* suspend the device */
     #define DVACT_RESUME	     4	     /* resume the device */
     #define DVACT_WAKEUP	     5	     /* tell device to recover after resume */
     #define DVACT_POWERDOWN	     6	     /* power device down */

CONTEXT
     config_detach() is always called from process context, allowing tsleep(9)
     to be called while the device detaches itself (to deal with processes
     which have a device open).

RETURN VALUES
     config_detach() and config_deactivate() return zero if successful and an
     error code otherwise.

SEE ALSO
     config_found(9)

OpenBSD 6.0		       December 5, 2014			   OpenBSD 6.0