diff options
| -rw-r--r-- | drivers/media/media-device.c | 33 | ||||
| -rw-r--r-- | include/media/media-device.h | 2 |
2 files changed, 35 insertions, 0 deletions
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c index 7b39440192d6..a4d5b2488c05 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -462,3 +462,36 @@ void media_device_unregister_entity(struct media_entity *entity) entity->parent = NULL; } EXPORT_SYMBOL_GPL(media_device_unregister_entity); + +static void media_device_release_devres(struct device *dev, void *res) +{ +} + +/* + * media_device_get_devres() - get media device as device resource + * creates if one doesn't exist +*/ +struct media_device *media_device_get_devres(struct device *dev) +{ + struct media_device *mdev; + + mdev = devres_find(dev, media_device_release_devres, NULL, NULL); + if (mdev) + return mdev; + + mdev = devres_alloc(media_device_release_devres, + sizeof(struct media_device), GFP_KERNEL); + if (!mdev) + return NULL; + return devres_get(dev, mdev, NULL, NULL); +} +EXPORT_SYMBOL_GPL(media_device_get_devres); + +/* + * media_device_find_devres() - find media device as device resource +*/ +struct media_device *media_device_find_devres(struct device *dev) +{ + return devres_find(dev, media_device_release_devres, NULL, NULL); +} +EXPORT_SYMBOL_GPL(media_device_find_devres); diff --git a/include/media/media-device.h b/include/media/media-device.h index 6e6db78f1ee2..22792cd5b1d1 100644 --- a/include/media/media-device.h +++ b/include/media/media-device.h @@ -95,6 +95,8 @@ void media_device_unregister(struct media_device *mdev); int __must_check media_device_register_entity(struct media_device *mdev, struct media_entity *entity); void media_device_unregister_entity(struct media_entity *entity); +struct media_device *media_device_get_devres(struct device *dev); +struct media_device *media_device_find_devres(struct device *dev); /* Iterate over all entities. */ #define media_device_for_each_entity(entity, mdev) \ |