diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/of_graph.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h index 44518f3583a4..a692d9d979a6 100644 --- a/include/linux/of_graph.h +++ b/include/linux/of_graph.h @@ -50,6 +50,18 @@ struct of_endpoint { for (struct device_node *child __free(device_node) = of_graph_get_next_port(parent, NULL);\ child != NULL; child = of_graph_get_next_port(parent, child)) +/** + * for_each_of_graph_port_endpoint - iterate over every endpoint in a port node + * @parent: parent port node + * @child: loop variable pointing to the current endpoint node + * + * When breaking out of the loop, and continue to use the @child, you need to + * use return_ptr(@child) or no_free_ptr(@child) not to call __free() for it. + */ +#define for_each_of_graph_port_endpoint(parent, child) \ + for (struct device_node *child __free(device_node) = of_graph_get_next_port_endpoint(parent, NULL);\ + child != NULL; child = of_graph_get_next_port_endpoint(parent, child)) + #ifdef CONFIG_OF bool of_graph_is_present(const struct device_node *node); int of_graph_parse_endpoint(const struct device_node *node, @@ -61,6 +73,8 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, struct device_node *previous); struct device_node *of_graph_get_next_port(const struct device_node *parent, struct device_node *port); +struct device_node *of_graph_get_next_port_endpoint(const struct device_node *port, + struct device_node *prev); struct device_node *of_graph_get_endpoint_by_regs( const struct device_node *parent, int port_reg, int reg); struct device_node *of_graph_get_remote_endpoint( @@ -114,6 +128,13 @@ static inline struct device_node *of_graph_get_next_port( return NULL; } +static inline struct device_node *of_graph_get_next_port_endpoint( + const struct device_node *parent, + struct device_node *previous) +{ + return NULL; +} + static inline struct device_node *of_graph_get_endpoint_by_regs( const struct device_node *parent, int port_reg, int reg) { |