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dm: core: Allow uclass to set up a device's child before it is probed

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Some buses need to set up their devices before they can be used. This setup
may well be common to all buses in a particular uclass. Support a common
pre-probe method for the uclass, called before any bus devices are probed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
This commit is contained in:
Simon Glass
2015-01-25 08:27:10 -07:00
parent 1603bf3cc1
commit 83c7e434c9
7 changed files with 85 additions and 0 deletions
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13
drivers/core/uclass.c
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@@ -391,6 +391,19 @@ int uclass_resolve_seq(struct udevice *dev)
return seq;
}
int uclass_pre_probe_child(struct udevice *dev)
{
struct uclass_driver *uc_drv;
if (!dev->parent)
return 0;
uc_drv = dev->parent->uclass->uc_drv;
if (uc_drv->child_pre_probe)
return uc_drv->child_pre_probe(dev);
return 0;
}
int uclass_post_probe_device(struct udevice *dev)
{
struct uclass_driver *uc_drv = dev->uclass->uc_drv;