diff options
Diffstat (limited to 'include/dm/uclass.h')
| -rw-r--r-- | include/dm/uclass.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 4ef0d0f0c0..1bc62d523e 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -308,6 +308,18 @@ int uclass_first_device_err(enum uclass_id id, struct udevice **devp); int uclass_next_device(struct udevice **devp); /** + * uclass_next_device_err() - Get the next device in a uclass + * + * The device returned is probed if necessary, and ready for use + * + * @devp: On entry, pointer to device to lookup. On exit, returns pointer + * to the next device in the uclass if no error occurred, or -ENODEV if + * there is no next device. + * @return 0 if found, -ENODEV if not found, other -ve on error + */ +int uclass_next_device_err(struct udevice **devp); + +/** * uclass_first_device_check() - Get the first device in a uclass * * The device returned is probed if necessary, and ready for use @@ -381,4 +393,20 @@ int uclass_resolve_seq(struct udevice *dev); #define uclass_foreach_dev_safe(pos, next, uc) \ list_for_each_entry_safe(pos, next, &uc->dev_head, uclass_node) +/** + * uclass_foreach_dev_probe() - Helper function to iteration through devices + * of given uclass + * + * This creates a for() loop which works through the available devices in + * a uclass in order from start to end. Devices are probed if necessary, + * and ready for use. + * + * @id: Uclass ID + * @dev: struct udevice * to hold the current device. Set to NULL when there + * are no more devices. + */ +#define uclass_foreach_dev_probe(id, dev) \ + for (int _ret = uclass_first_device_err(id, &dev); !_ret && dev; \ + _ret = uclass_next_device_err(&dev)) + #endif |