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 <ag...@suse.de>
---
device_tree.c | 7 +++++++
device_tree.h | 1 +
2 files changed, 8 insertions(+), 0 deletions(-)
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 @@ int qemu_devtree_setprop_phandle(void *fdt, const char
*node_path,
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;
diff --git a/device_tree.h b/device_tree.h
index 5f76f40..97af345 100644
--- a/device_tree.h
+++ b/device_tree.h
@@ -27,6 +27,7 @@ int qemu_devtree_setprop_phandle(void *fdt, const char
*node_path,
const char *property,
const char *target_node_path);
uint32_t qemu_devtree_get_phandle(void *fdt, const char *path);
+uint32_t qemu_devtree_alloc_phandle(void *fdt);
int qemu_devtree_nop_node(void *fdt, const char *node_path);
int qemu_devtree_add_subnode(void *fdt, const char *name);
--
1.6.0.2
