dm: core: Add functions to find parent and OF data

Add dev_get_parent() as a convenience to obtain the parent of a device.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
Acked-by: Heiko Schocher <hs@denx.de>

diff --git a/drivers/core/device.c b/drivers/core/device.c
index 81ddeca..6793e1c 100644 (file)
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -381,6 +381,11 @@ int device_find_next_child(struct udevice **devp)
        return 0;
 }
 
+struct udevice *dev_get_parent(struct udevice *child)
+{
+       return child->parent;
+}
+
 ulong dev_get_of_data(struct udevice *dev)
 {
        return dev->of_id->data;

diff --git a/include/dm/device.h b/include/dm/device.h
index 287504c..13598a1 100644 (file)
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -208,6 +208,14 @@ void *dev_get_parentdata(struct udevice *dev);
 void *dev_get_priv(struct udevice *dev);
 
 /**
+ * struct dev_get_parent() - Get the parent of a device
+ *
+ * @child:     Child to check
+ * @return parent of child, or NULL if this is the root device
+ */
+struct udevice *dev_get_parent(struct udevice *child);
+
+/**
  * dev_get_of_data() - get the device tree data used to bind a device
  *
  * When a device is bound using a device tree node, it matches a