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>
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 78bc460..b73d3b8 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -227,6 +227,10 @@
}
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 a544551..289a5d2 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -391,6 +391,19 @@
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;