diff options
| author | Simon Glass <[email protected]> | 2024-10-19 09:21:49 -0600 |
|---|---|---|
| committer | Simon Glass <[email protected]> | 2024-11-02 11:13:59 -0600 |
| commit | cedf9ccaa27828876bc29b1dfc721cea2e5e6dfc (patch) | |
| tree | fcd57ae86314f216f73748dbf935d4ebf47cddb2 /include | |
| parent | b84c13f37d19a3605bb6e34d26c2396cc0fffd86 (diff) | |
dm: core: Add a function to see if a device exists
All the uclass functions for finding a device end up creating a uclass
if it doesn't exist. Add a function which instead returns NULL in this
case.
This is useful when in the 'unbind' path, since we don't want to undo
any unbinding which has already happened.
Signed-off-by: Simon Glass <[email protected]>
Diffstat (limited to 'include')
| -rw-r--r-- | include/dm/uclass.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 456eef7f2f3..c2793040923 100644 --- a/include/dm/uclass.h +++ b/include/dm/uclass.h @@ -436,6 +436,17 @@ int uclass_first_device_drvdata(enum uclass_id id, ulong driver_data, struct udevice **devp); /** + * uclass_try_first_device()- See if there is a device for a uclass + * + * If the uclass exists, this returns the first device on that uclass, without + * probing it. If the uclass does not exist, it gives up + * + * @id: Uclass ID to check + * Return: Pointer to device, if found, else NULL + */ +struct udevice *uclass_try_first_device(enum uclass_id id); + +/** * uclass_probe_all() - Probe all devices based on an uclass ID * * This function probes all devices associated with a uclass by |