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127 lines
3.6 KiB
127 lines
3.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* OF graph binding parsing helpers |
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* |
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* Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. |
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* Author: Sylwester Nawrocki <[email protected]> |
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* |
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* Copyright (C) 2012 Renesas Electronics Corp. |
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* Author: Guennadi Liakhovetski <[email protected]> |
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*/ |
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#ifndef __LINUX_OF_GRAPH_H |
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#define __LINUX_OF_GRAPH_H |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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/** |
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* struct of_endpoint - the OF graph endpoint data structure |
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* @port: identifier (value of reg property) of a port this endpoint belongs to |
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* @id: identifier (value of reg property) of this endpoint |
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* @local_node: pointer to device_node of this endpoint |
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*/ |
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struct of_endpoint { |
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unsigned int port; |
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unsigned int id; |
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const struct device_node *local_node; |
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}; |
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/** |
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* for_each_endpoint_of_node - iterate over every endpoint in a device node |
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* @parent: parent device node containing ports and endpoints |
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* @child: loop variable pointing to the current endpoint node |
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* |
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* When breaking out of the loop, of_node_put(child) has to be called manually. |
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*/ |
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#define for_each_endpoint_of_node(parent, child) \ |
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for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \ |
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child = of_graph_get_next_endpoint(parent, child)) |
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#ifdef CONFIG_OF |
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bool of_graph_is_present(const struct device_node *node); |
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int of_graph_parse_endpoint(const struct device_node *node, |
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struct of_endpoint *endpoint); |
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int of_graph_get_endpoint_count(const struct device_node *np); |
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struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id); |
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struct device_node *of_graph_get_next_endpoint(const struct device_node *parent, |
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struct device_node *previous); |
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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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struct device_node *of_graph_get_remote_node(const struct device_node *node, |
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u32 port, u32 endpoint); |
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#else |
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static inline bool of_graph_is_present(const struct device_node *node) |
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{ |
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return false; |
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} |
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static inline int of_graph_parse_endpoint(const struct device_node *node, |
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struct of_endpoint *endpoint) |
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{ |
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return -ENOSYS; |
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} |
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static inline int of_graph_get_endpoint_count(const struct device_node *np) |
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{ |
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return 0; |
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} |
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static inline struct device_node *of_graph_get_port_by_id( |
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struct device_node *node, u32 id) |
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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_next_endpoint( |
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const struct device_node *parent, |
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struct device_node *previous) |
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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_endpoint_by_regs( |
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const struct device_node *parent, int port_reg, int reg) |
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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_endpoint( |
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const 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_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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return NULL; |
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} |
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static inline struct device_node *of_graph_get_remote_port( |
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const 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_node( |
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const struct device_node *node, |
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u32 port, u32 endpoint) |
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{ |
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return NULL; |
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} |
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#endif /* CONFIG_OF */ |
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#endif /* __LINUX_OF_GRAPH_H */
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