dt: add helper for phandle allocation
Phandle references work by having 2 pieces:
- a "phandle" 1-cell property in the device tree node
- a reference to the same value in a property we want to point
to the other node
To generate the 1-cell property, we need an allocation mechanism that
gives us a unique number space. This patch adds an allocator for these
properties.
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/device_tree.c b/device_tree.c
index d037896..7541274 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -191,6 +191,13 @@
return qemu_devtree_setprop_cell(fdt, node_path, property, phandle);
}
+uint32_t qemu_devtree_alloc_phandle(void *fdt)
+{
+ static int phandle = 0x8000;
+
+ return phandle++;
+}
+
int qemu_devtree_nop_node(void *fdt, const char *node_path)
{
int r;