driver core: Add helper device_find_child_by_name()
It looks like the child device is often matched with a name. This introduces a helper that does it automatically. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Tested-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>alistair/sunxi64-5.4-dsi
parent
b06184acf7
commit
dad9bb0178
|
@ -2474,6 +2474,34 @@ struct device *device_find_child(struct device *parent, void *data,
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(device_find_child);
|
EXPORT_SYMBOL_GPL(device_find_child);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* device_find_child_by_name - device iterator for locating a child device.
|
||||||
|
* @parent: parent struct device
|
||||||
|
* @name: name of the child device
|
||||||
|
*
|
||||||
|
* This is similar to the device_find_child() function above, but it
|
||||||
|
* returns a reference to a device that has the name @name.
|
||||||
|
*
|
||||||
|
* NOTE: you will need to drop the reference with put_device() after use.
|
||||||
|
*/
|
||||||
|
struct device *device_find_child_by_name(struct device *parent,
|
||||||
|
const char *name)
|
||||||
|
{
|
||||||
|
struct klist_iter i;
|
||||||
|
struct device *child;
|
||||||
|
|
||||||
|
if (!parent)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
klist_iter_init(&parent->p->klist_children, &i);
|
||||||
|
while ((child = next_device(&i)))
|
||||||
|
if (!strcmp(dev_name(child), name) && get_device(child))
|
||||||
|
break;
|
||||||
|
klist_iter_exit(&i);
|
||||||
|
return child;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(device_find_child_by_name);
|
||||||
|
|
||||||
int __init devices_init(void)
|
int __init devices_init(void)
|
||||||
{
|
{
|
||||||
devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);
|
devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);
|
||||||
|
|
|
@ -1250,6 +1250,8 @@ extern int device_for_each_child_reverse(struct device *dev, void *data,
|
||||||
int (*fn)(struct device *dev, void *data));
|
int (*fn)(struct device *dev, void *data));
|
||||||
extern struct device *device_find_child(struct device *dev, void *data,
|
extern struct device *device_find_child(struct device *dev, void *data,
|
||||||
int (*match)(struct device *dev, void *data));
|
int (*match)(struct device *dev, void *data));
|
||||||
|
extern struct device *device_find_child_by_name(struct device *parent,
|
||||||
|
const char *name);
|
||||||
extern int device_rename(struct device *dev, const char *new_name);
|
extern int device_rename(struct device *dev, const char *new_name);
|
||||||
extern int device_move(struct device *dev, struct device *new_parent,
|
extern int device_move(struct device *dev, struct device *new_parent,
|
||||||
enum dpm_order dpm_order);
|
enum dpm_order dpm_order);
|
||||||
|
|
Loading…
Reference in New Issue