diff options
| -rw-r--r-- | src/include/device_tree.h | 2 | ||||
| -rw-r--r-- | src/lib/device_tree.c | 22 |
2 files changed, 24 insertions, 0 deletions
diff --git a/src/include/device_tree.h b/src/include/device_tree.h index 107fcf6a48..54aecb98b8 100644 --- a/src/include/device_tree.h +++ b/src/include/device_tree.h @@ -147,6 +147,8 @@ struct device_tree_node *dt_find_next_compat_child(struct device_tree_node *pare // Look up a node relative to a parent node, through its property value. struct device_tree_node *dt_find_prop_value(struct device_tree_node *parent, const char *name, void *data, size_t size); +// Return the phandle +uint32_t dt_get_phandle(struct device_tree_node *node); // Write src into *dest as a 'length'-byte big-endian integer. void dt_write_int(u8 *dest, u64 src, size_t length); // Add different kinds of properties to a node, or update existing ones. diff --git a/src/lib/device_tree.c b/src/lib/device_tree.c index 0a88c1f886..de14c15536 100644 --- a/src/lib/device_tree.c +++ b/src/lib/device_tree.c @@ -725,6 +725,28 @@ struct device_tree_node *dt_find_prop_value(struct device_tree_node *parent, return NULL; } +/** + * Find the phandle of a node. + * + * @param node Pointer to node containing the phandle + * @return Zero on error, the phandle on success + */ +uint32_t dt_get_phandle(struct device_tree_node *node) +{ + uint32_t *phandle; + size_t len; + + dt_find_bin_prop(node, "phandle", (void **)&phandle, &len); + if (phandle != NULL && len == sizeof(*phandle)) + return be32_to_cpu(*phandle); + + dt_find_bin_prop(node, "linux,phandle", (void **)&phandle, &len); + if (phandle != NULL && len == sizeof(*phandle)) + return be32_to_cpu(*phandle); + + return 0; +} + /* * Write an arbitrary sized big-endian integer into a pointer. * |