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authorAlexander Graf <agraf@suse.de>2012-05-17 15:23:39 +0200
committerAlexander Graf <agraf@suse.de>2012-06-24 01:04:46 +0200
commit7d5fd1089c36391ffc53a694101f441ab8cbbc05 (patch)
tree432e8bfdb22294e873b6c0c9c9b4e7386b7a0dbe /device_tree.c
parentef5d833fc6f04119ded9fca294d26ce225d69490 (diff)
downloadqemu-arm-7d5fd1089c36391ffc53a694101f441ab8cbbc05.tar.gz
dt: add helper for phandle enumeration
This patch adds a helper to search for a node's phandle by its path. This is especially useful when the phandle is part of an array, not just a single cell in which case qemu_devtree_setprop_phandle would be the easy choice. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>
Diffstat (limited to 'device_tree.c')
-rw-r--r--device_tree.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/device_tree.c b/device_tree.c
index 967c97ac04..2f127b71b0 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -132,11 +132,25 @@ int qemu_devtree_setprop_string(void *fdt, const char *node_path,
return r;
}
+uint32_t qemu_devtree_get_phandle(void *fdt, const char *path)
+{
+ uint32_t r;
+
+ r = fdt_get_phandle(fdt, findnode_nofail(fdt, path));
+ if (r <= 0) {
+ fprintf(stderr, "%s: Couldn't get phandle for %s: %s\n", __func__,
+ path, fdt_strerror(r));
+ exit(1);
+ }
+
+ 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));
+ uint32_t phandle = qemu_devtree_get_phandle(fdt, target_node_path);
return qemu_devtree_setprop_cell(fdt, node_path, property, phandle);
}