of_graph: add of_graph_get_port_parent()
Linux kernel already has of_graph_get_remote_port_parent(), but, sometimes we want to get own port parent. This patch adds of_graph_get_port_parent() Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -2500,6 +2500,27 @@ struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
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}
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EXPORT_SYMBOL(of_graph_get_remote_endpoint);
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/**
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* of_graph_get_port_parent() - get port's parent node
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* @node: pointer to a local endpoint device_node
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*
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* Return: device node associated with endpoint node linked
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* to @node. Use of_node_put() on it when done.
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*/
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struct device_node *of_graph_get_port_parent(struct device_node *node)
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{
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unsigned int depth;
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/* Walk 3 levels up only if there is 'ports' node. */
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for (depth = 3; depth && node; depth--) {
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node = of_get_next_parent(node);
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if (depth == 2 && of_node_cmp(node->name, "ports"))
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break;
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}
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return node;
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}
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EXPORT_SYMBOL(of_graph_get_port_parent);
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/**
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* of_graph_get_remote_port_parent() - get remote port's parent node
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* @node: pointer to a local endpoint device_node
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@ -2511,18 +2532,11 @@ struct device_node *of_graph_get_remote_port_parent(
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const struct device_node *node)
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{
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struct device_node *np;
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unsigned int depth;
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/* Get remote endpoint node. */
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np = of_graph_get_remote_endpoint(node);
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/* Walk 3 levels up only if there is 'ports' node. */
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for (depth = 3; depth && np; depth--) {
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np = of_get_next_parent(np);
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if (depth == 2 && of_node_cmp(np->name, "ports"))
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break;
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}
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return np;
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return of_graph_get_port_parent(np);
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}
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EXPORT_SYMBOL(of_graph_get_remote_port_parent);
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@ -50,6 +50,7 @@ struct device_node *of_graph_get_endpoint_by_regs(
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const struct device_node *parent, int port_reg, int reg);
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struct device_node *of_graph_get_remote_endpoint(
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const struct device_node *node);
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struct device_node *of_graph_get_port_parent(struct device_node *node);
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struct device_node *of_graph_get_remote_port_parent(
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const struct device_node *node);
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struct device_node *of_graph_get_remote_port(const struct device_node *node);
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@ -88,6 +89,12 @@ static inline struct device_node *of_graph_get_remote_endpoint(
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return NULL;
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}
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static inline struct device_node *of_graph_get_port_parent(
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struct device_node *node)
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{
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return NULL;
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}
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static inline struct device_node *of_graph_get_remote_port_parent(
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const struct device_node *node)
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{
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