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| author | Simon Glass <sjg@chromium.org> | 2018-10-01 21:22:07 +0300 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2018-10-09 13:40:27 +0300 |
| commit | cdb6aa0afb52da34306c4339f2f4d6cbd3b0ad02 (patch) | |
| tree | 4940b03e27947c496c460da6df96d719fe29dedc /include/dm | |
| parent | 9f15cc14bf88a9ee8d7b1fbf607cde22923889d6 (diff) | |
| download | u-boot-cdb6aa0afb52da34306c4339f2f4d6cbd3b0ad02.tar.xz | |
dm: core: Add a function to find the first inactive child
Some devices have children and want to press an existing inactive child
into service when needed. Add a function to help with this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/dm')
| -rw-r--r-- | include/dm/device.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/dm/device.h b/include/dm/device.h index f873fc66e1..847934425b 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -520,6 +520,21 @@ int device_find_first_child(struct udevice *parent, struct udevice **devp); int device_find_next_child(struct udevice **devp); /** + * device_find_first_inactive_child() - Find the first inactive child + * + * This is used to locate an existing child of a device which is of a given + * uclass. + * + * @parent: Parent device to search + * @uclass_id: Uclass to look for + * @devp: Returns device found, if any + * @return 0 if found, else -ENODEV + */ +int device_find_first_inactive_child(struct udevice *parent, + enum uclass_id uclass_id, + struct udevice **devp); + +/** * device_has_children() - check if a device has any children * * @dev: Device to check |