dt: add helper for phandle references

Phandles are the fancy device tree name for "pointer to another node". To create a phandle property, we most likely want to reference to the node we're pointing to by its path. So create a helper that allows us to do so. Signed-off-by: Alexander Graf <[email protected]> Reviewed-by: Peter Crosthwaite <[email protected]>
victormwenda · Jun 23, 2012 · 8535ab1 · 8535ab1
1 parent 7ae2291
commit 8535ab1
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diff --git a/device_tree.c b/device_tree.c
@@ -132,6 +132,14 @@ int qemu_devtree_setprop_string(void *fdt, const char *node_path,
     return r;
 }
 
+int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
+                                 const char *property,
+                                 const char *target_node_path)
+{
+    uint32_t phandle = fdt_get_phandle(fdt, findnode_nofail(fdt, target_node_path));
+    return qemu_devtree_setprop_cell(fdt, node_path, property, phandle);
+}
+
 int qemu_devtree_nop_node(void *fdt, const char *node_path)
 {
     int r;

diff --git a/device_tree.h b/device_tree.h
@@ -22,6 +22,9 @@ int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
                               const char *property, uint32_t val);
 int qemu_devtree_setprop_string(void *fdt, const char *node_path,
                                 const char *property, const char *string);
+int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
+                                 const char *property,
+                                 const char *target_node_path);
 int qemu_devtree_nop_node(void *fdt, const char *node_path);
 int qemu_devtree_add_subnode(void *fdt, const char *name);