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| author | Simon Glass <sjg@chromium.org> | 2014-10-13 23:41:50 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-10-22 10:36:46 -0600 |
| commit | accd4b19b39bde7398aa8d1a8eeb66f3a14dde5b (patch) | |
| tree | 09bcc8e1c9ebd5b6213bdb198b35691f8902e57a /include/dm/device.h | |
| parent | a8981d4f80b010666ad754d20a4f389f94d6726d (diff) | |
| download | u-boot-imx-accd4b19b39bde7398aa8d1a8eeb66f3a14dde5b.zip u-boot-imx-accd4b19b39bde7398aa8d1a8eeb66f3a14dde5b.tar.gz u-boot-imx-accd4b19b39bde7398aa8d1a8eeb66f3a14dde5b.tar.bz2 | |
dm: core: Allow parents to pass data to children during probe
Buses sometimes want to pass data to their children when they are probed.
For example, a SPI bus may want to tell the slave device about the chip
select it is connected to.
Add a new function to permit the parent data to be supplied to the child.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Diffstat (limited to 'include/dm/device.h')
| -rw-r--r-- | include/dm/device.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/dm/device.h b/include/dm/device.h index 160cd58..56862d3 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -139,6 +139,10 @@ struct udevice_id { * @per_child_auto_alloc_size: Each device can hold private data owned by * its parent. If required this will be automatically allocated if this * value is non-zero. + * TODO(sjg@chromium.org): I'm considering dropping this, and just having + * device_probe_child() pass it in. So far the use case for allocating it + * is SPI, but I found that unsatisfactory. Since it is here I will leave it + * until things are clearer. * @ops: Driver-specific operations. This is typically a list of function * pointers defined by the driver, to implement driver functions required by * the uclass. |