/*
* test_bus_add
* make call to bus_add_device, which will
* in turn add the device that is passed in
* to the bus
*/
static int test_bus_add() {
/* check if device register returns an error */
if (bus_add_device(&test_device)) {
printk("tbase: Device not added to bus\n");
return 1;
}
else {
printk("tbase: Device added to bus\n");
return 0;
}
}
/**
* device_add - add device to device hierarchy.
* @dev: device.
*
* This is part 2 of device_register(), though may be called
* separately _iff_ device_initialize() has been called separately.
*
* This adds it 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.
*/
int device_add(struct device *dev)
{
struct device *parent = NULL;
int error = -EINVAL;
dev = get_device(dev);
if (!dev || !strlen(dev->bus_id))
goto Error;
parent = get_device(dev->parent);
pr_debug("DEV: registering device: ID = '%s'\n", dev->bus_id);
/* first, register with generic layer. */
kobject_set_name(&dev->kobj, "%s", dev->bus_id);
if (parent)
dev->kobj.parent = &parent->kobj;
if ((error = kobject_add(&dev->kobj)))
goto Error;
kobject_hotplug(&dev->kobj, KOBJ_ADD);
if ((error = device_pm_add(dev)))
goto PMError;
if ((error = bus_add_device(dev)))
goto BusError;
if (parent)
klist_add_tail(&parent->klist_children, &dev->knode_parent);
/* notify platform of device entry */
if (platform_notify)
platform_notify(dev);
Done:
put_device(dev);
return error;
BusError:
device_pm_remove(dev);
PMError:
kobject_hotplug(&dev->kobj, KOBJ_REMOVE);
kobject_del(&dev->kobj);
Error:
if (parent)
put_device(parent);
goto Done;
}
