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 afd9923fb3..48ae2420df 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -106,6 +106,22 @@ int uclass_get(enum uclass_id key, struct uclass **ucp); int uclass_get_device(enum uclass_id id, int index, struct udevice **devp); /** + * uclass_get_device_by_seq() - Get a uclass device based on an ID and sequence + * + * If an active device has this sequence it will be returned. If there is no + * such device then this will check for a device that is requesting this + * sequence. + * + * The device is probed to activate it ready for use. + * + * @id: ID to look up + * @seq: Sequence number to find (0=first) + * @devp: Returns pointer to device (there is only one for each seq) + * @return 0 if OK, -ve on error + */ +int uclass_get_device_by_seq(enum uclass_id id, int seq, struct udevice **devp); + +/** * uclass_first_device() - Get the first device in a uclass * * @id: Uclass ID to look up @@ -124,6 +140,21 @@ int uclass_first_device(enum uclass_id id, struct udevice **devp); int uclass_next_device(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 + * sequence number automatically, or >= 0 to select a particular number. + * If the requested sequence number is in use, then this device will + * be allocated another one. + * + * Note that the device's seq value is not changed by this function. + * + * @dev: Device for which to allocate sequence number + * @return sequence number allocated, or -ve on error + */ +int uclass_resolve_seq(struct udevice *dev); + +/** * uclass_foreach_dev() - Helper function to iteration through devices * * This creates a for() loop which works through the available devices in |