On Tue, Jun 18, 2013 at 07:29:58PM +0200, Sebastian Hesselbarth wrote:
> This imports of_get_parent, of_get_next_child, of_get_next_available_child,
> and of_get_child_by_name and corresponding helpers from Linux OF API.
>
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
> ---
> Cc: barebox@xxxxxxxxxxxxxxxxxxx
> ---
> drivers/of/base.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> include/of.h | 49 +++++++++++++++++++++++++++++++++
> 2 files changed, 127 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 148f832..17364ea 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -862,6 +862,84 @@ int of_device_is_available(const struct device_node *device)
> }
> EXPORT_SYMBOL(of_device_is_available);
>
> +/**
> + * of_get_parent - Get a node's parent if any
> + * @node: Node to get parent
> + *
> + * Returns a pointer to the parent node or NULL if already at root.
> + */
> +struct device_node *of_get_parent(const struct device_node *node)
> +{
> + if (!node)
> + return NULL;
> +
> + return (node == root_node) ? NULL : node->parent;
parent should be NULL for the root_node, so it should be safe to remove
this additional check. This is also in the sense of making multiple
devicetrees possible.
Sascha
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