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authorSimon Glass <sjg@chromium.org>2015-01-25 08:27:10 -0700
committerSimon Glass <sjg@chromium.org>2015-01-29 17:09:56 -0700
commit83c7e434c9dd3ca81f8b763e23c1881b973bcf2f (patch)
treec0fc096ee51bbcd66ccabd77826e236f49329845 /drivers
parent1603bf3cc189da65362b83b85831e094a2fe8516 (diff)
downloadblackbird-obmc-uboot-83c7e434c9dd3ca81f8b763e23c1881b973bcf2f.tar.gz
blackbird-obmc-uboot-83c7e434c9dd3ca81f8b763e23c1881b973bcf2f.zip
dm: core: Allow uclass to set up a device's child before it is probed
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/core/device.c4
-rw-r--r--drivers/core/uclass.c13
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 78bc460d35..b73d3b8961 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -227,6 +227,10 @@ int device_probe_child(struct udevice *dev, void *parent_priv)
}
dev->seq = seq;
+ ret = uclass_pre_probe_child(dev);
+ if (ret)
+ goto fail;
+
if (dev->parent && dev->parent->driver->child_pre_probe) {
ret = dev->parent->driver->child_pre_probe(dev);
if (ret)
diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index a5445518f5..289a5d2d53 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -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;
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