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| author | Simon Glass <sjg@chromium.org> | 2020-02-06 09:54:50 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-02-07 22:41:24 +0800 |
| commit | 50162348f0d3b915004733131acd81805e202c76 (patch) | |
| tree | 56db3ef185e028253871f7f0ecd7d3c7a80e366a /include/dm/uclass.h | |
| parent | 3cf0fba4ff862d833545f82fb2209ff3c79d17b5 (diff) | |
| download | u-boot-50162348f0d3b915004733131acd81805e202c76.tar.gz u-boot-50162348f0d3b915004733131acd81805e202c76.tar.xz u-boot-50162348f0d3b915004733131acd81805e202c76.zip | |
dm: core: Add a function to find a device by drvdata
It is sometimes useful to find a device in a uclass using only its driver
data. The driver data often indicates the 'subtype' of the device, e,g,
via its compatible string.
Add a function to handle this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/dm/uclass.h')
| -rw-r--r-- | include/dm/uclass.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/dm/uclass.h b/include/dm/uclass.h index 74b8e2ecb5..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 |