[Qemu-devel] [PATCH 23/28] device tree: add add_subnode command

[Alexander Graf <agraf@suse.de>]

We want to be able to create subnodes in our device tree, so export it through
the qemu device tree abstraction framework.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 device_tree.c |   24 ++++++++++++++++++++++++
 device_tree.h |    1 +
 2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/device_tree.c b/device_tree.c
index ec79dba..e58d522 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -118,3 +118,27 @@ int qemu_devtree_nop_node(void *fdt, const char *node_path)
 
     return fdt_nop_node(fdt, offset);
 }
+
+int qemu_devtree_add_subnode(void *fdt, const char *name)
+{
+    int offset;
+    char *dupname = qemu_strdup(name);
+    char *basename = strrchr(dupname, '/');
+    int retval;
+
+    if (!basename) {
+        return -1;
+    }
+
+    basename[0] = '\0';
+    basename++;
+
+    offset = fdt_path_offset(fdt, dupname);
+    if (offset < 0) {
+        return offset;
+    }
+
+    retval = fdt_add_subnode(fdt, offset, basename);
+    qemu_free(dupname);
+    return retval;
+}
diff --git a/device_tree.h b/device_tree.h
index 76fce5f..4378685 100644
--- a/device_tree.h
+++ b/device_tree.h
@@ -23,5 +23,6 @@ int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
 int qemu_devtree_setprop_string(void *fdt, const char *node_path,
                                 const char *property, const char *string);
 int qemu_devtree_nop_node(void *fdt, const char *node_path);
+int qemu_devtree_add_subnode(void *fdt, const char *name);
 
 #endif /* __DEVICE_TREE_H__ */
-- 
1.6.0.2