diff options
Diffstat (limited to 'include/dm/uclass.h')
| -rw-r--r-- | include/dm/uclass.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 484d166013..70fca79b44 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -351,6 +351,20 @@ int uclass_first_device_check(enum uclass_id id, struct udevice **devp); int uclass_next_device_check(struct udevice **devp); /** + * uclass_first_device_drvdata() - Find the first device with given driver data + * + * This searches through the devices for a particular uclass looking for one + * that has the given driver data. + * + * @id: Uclass ID to check + * @driver_data: Driver data to search for + * @devp: Returns pointer to the first matching device in that uclass, if found + * @return 0 if found, -ENODEV if not found, other -ve on error + */ +int uclass_first_device_drvdata(enum uclass_id id, ulong driver_data, + struct udevice **devp); + +/** * uclass_resolve_seq() - Resolve a device's sequence number * * On entry dev->seq is -1, and dev->req_seq may be -1 (to allocate a @@ -366,6 +380,23 @@ int uclass_next_device_check(struct udevice **devp); int uclass_resolve_seq(struct udevice *dev); /** + * uclass_id_foreach_dev() - Helper function to iteration through devices + * + * This creates a for() loop which works through the available devices in + * a uclass ID in order from start to end. + * + * If for some reason the uclass cannot be found, this does nothing. + * + * @id: enum uclass_id ID to use + * @pos: struct udevice * to hold the current device. Set to NULL when there + * are no more devices. + * @uc: temporary uclass variable (struct udevice *) + */ +#define uclass_id_foreach_dev(id, pos, uc) \ + if (!uclass_get(id, &uc)) \ + list_for_each_entry(pos, &uc->dev_head, uclass_node) + +/** * uclass_foreach_dev() - Helper function to iteration through devices * * This creates a for() loop which works through the available devices in |