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>
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 9538874..49faa29 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -232,7 +232,7 @@
}
}
-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 @@
ret = -ENOMEM;
goto fail;
}
+ if (parent_priv)
+ memcpy(dev->parent_priv, parent_priv, size);
}
ret = device_probe(dev->parent);
@@ -335,6 +337,11 @@
return ret;
}
+int device_probe(struct udevice *dev)
+{
+ return device_probe_child(dev, NULL);
+}
+
int device_remove(struct udevice *dev)
{
struct driver *drv;