From e679c5f445fe142940e0962de9c5c82f10d9357c Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 24 Apr 2007 17:16:16 +1000 Subject: Consolidate of_get_parent This requires creating dummy of_node_{get,put} routines for sparc and sparc64. It also adds a read_lock around the parent accesses. Signed-off-by: Stephen Rothwell Acked-by: Paul Mackerras Acked-by: David S. Miller --- drivers/of/base.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers') diff --git a/drivers/of/base.c b/drivers/of/base.c index 70b60845140..82bb78680ff 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -113,3 +113,24 @@ int of_device_is_compatible(const struct device_node *device, return 0; } EXPORT_SYMBOL(of_device_is_compatible); + +/** + * of_get_parent - Get a node's parent if any + * @node: Node to get parent + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *of_get_parent(const struct device_node *node) +{ + struct device_node *np; + + if (!node) + return NULL; + + read_lock(&devtree_lock); + np = of_node_get(node->parent); + read_unlock(&devtree_lock); + return np; +} +EXPORT_SYMBOL(of_get_parent); -- cgit v1.2.3