dm: core: Add functions for iterating through device children

[karo-tx-uboot.git] / drivers / core / device.c

diff --git a/drivers/core/device.c b/drivers/core/device.c
index 32e80e82b59c99f9ac5734c8f3dadc7c3b0c5f28..9538874017ac4865acc30177b6982b1e6e0f4fd1 100644 (file)
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -514,3 +514,30 @@ int device_get_child_by_of_offset(struct udevice *parent, int seq,
        ret = device_find_child_by_of_offset(parent, seq, &dev);
        return device_get_device_tail(dev, ret, devp);
 }
+
+int device_find_first_child(struct udevice *parent, struct udevice **devp)
+{
+       if (list_empty(&parent->child_head)) {
+               *devp = NULL;
+       } else {
+               *devp = list_first_entry(&parent->child_head, struct udevice,
+                                        sibling_node);
+       }
+
+       return 0;
+}
+
+int device_find_next_child(struct udevice **devp)
+{
+       struct udevice *dev = *devp;
+       struct udevice *parent = dev->parent;
+
+       if (list_is_last(&dev->sibling_node, &parent->child_head)) {
+               *devp = NULL;
+       } else {
+               *devp = list_entry(dev->sibling_node.next, struct udevice,
+                                  sibling_node);
+       }
+
+       return 0;
+}