device tree: add device_tree_for_each_node()

Add device_tree_for_each_node() to iterate over all nodes in a flat
device tree.  Use this in device_tree_early_init().

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index 28a3deef59..505f3e326e 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -28,10 +28,18 @@ struct dt_early_info {
     struct dt_mem_info mem;
 };
 
+typedef int (*device_tree_node_func)(const void *fdt,
+                                     int node, const char *name, int depth,
+                                     u32 address_cells, u32 size_cells,
+                                     void *data);
+
 extern struct dt_early_info early_info;
 extern void *device_tree_flattened;
 
 size_t device_tree_early_init(const void *fdt);
 paddr_t device_tree_get_xen_paddr(void);
 
+int device_tree_for_each_node(const void *fdt,
+                              device_tree_node_func func, void *data);
+
 #endif