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dm: core: Allow parents to pass data to children during probe

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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>
This commit is contained in:
Simon Glass
2014-10-13 23:41:50 -06:00
parent a8981d4f80
commit accd4b19b3
3 changed files with 25 additions and 1 deletions
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9
drivers/core/device.c
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@@ -232,7 +232,7 @@ static void device_free(struct udevice *dev)
}
}
int device_probe(struct udevice *dev)
int device_probe_child(struct udevice *dev, void *parent_priv)
{
struct driver *drv;
int size = 0;
@@ -282,6 +282,8 @@ int device_probe(struct udevice *dev)
ret = -ENOMEM;
goto fail;
}
if (parent_priv)
memcpy(dev->parent_priv, parent_priv, size);
}
ret = device_probe(dev->parent);
@@ -335,6 +337,11 @@ fail:
return ret;
}
int device_probe(struct udevice *dev)
{
return device_probe_child(dev, NULL);
}
int device_remove(struct udevice *dev)
{
struct driver *drv;