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