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| author | Simon Glass <sjg@chromium.org> | 2015-06-23 15:38:37 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-07-21 17:39:22 -0600 |
| commit | 2693047acdcdae20b066715d0da4937814347935 (patch) | |
| tree | 26da337c474cd8485f03b4088512fc832c0dd73a /include/dm/device.h | |
| parent | 3039811e6584d55c6a330a7cf409f4dcea13ee31 (diff) | |
| download | u-boot-2693047acdcdae20b066715d0da4937814347935.tar.gz u-boot-2693047acdcdae20b066715d0da4937814347935.tar.bz2 u-boot-2693047acdcdae20b066715d0da4937814347935.zip | |
dm: core: Add a function to find any device from device tree
In some rare cases it is useful to be able to locate a device given a device
tree node offset. An example is when you have an alias that points to a node
and you want to find the associated device. The device may be SPI, MMC or
something else, but you don't need to know the uclass to find it.
Add a function to do a global search for a device, given its device tree
offset.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/dm/device.h')
| -rw-r--r-- | include/dm/device.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/dm/device.h b/include/dm/device.h index 18296bb686..9a94ee19d9 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -390,6 +390,20 @@ int device_get_child_by_of_offset(struct udevice *parent, int seq, struct udevice **devp); /** + * device_get_global_by_of_offset() - Get a device based on FDT offset + * + * Locates a device by its device tree offset, searching globally throughout + * the all driver model devices. + * + * The device is probed to activate it ready for use. + * + * @of_offset: Device tree offset to find + * @devp: Returns pointer to device if found, otherwise this is set to NULL + * @return 0 if OK, -ve on error + */ +int device_get_global_by_of_offset(int of_offset, struct udevice **devp); + +/** * device_find_first_child() - Find the first child of a device * * @parent: Parent device to search |