Hello.
On 05-05-2011 21:02, David Daney wrote:
Currently all paths passed to of_find_node_by_path() must begin with a
'/', indicating a full path to the desired node.
Augment the look-up code so that if a path does *not* begin with '/',
the path is used as the name of an /aliases property. The value of
this alias is then used as the full node path to be found.
Signed-off-by: David Daney<ddaney@xxxxxxxxxxxxxxxxxx>
---
drivers/of/base.c | 41 ++++++++++++++++++++++++++++++++++++++++-
1 files changed, 40 insertions(+), 1 deletions(-)
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 632ebae..1a0a83e 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
[...]
@@ -348,14 +351,50 @@ EXPORT_SYMBOL(of_get_next_child);
struct device_node *of_find_node_by_path(const char *path)
{
struct device_node *np = allnodes;
+ struct device_node *aliases = NULL;
+ char *alias = NULL;
+ char *new_path = NULL;
read_lock(&devtree_lock);
+
+ if (path[0] != '/') {
+ const char *ps;
+ aliases = of_find_node_by_path("/aliases");
+ if (!aliases)
+ goto out;
+
+ ps = strchr(path, '/');
+ if (ps) {
+ size_t len = ps - path;
+ alias = kmalloc(len + 1, GFP_KERNEL);
+ strncpy(alias, path, len);
+ alias[len] = 0;
BTW, you could use kstrndup() (from mm/util.c) instead of the above 3 lines.
WBR, Sergei
