root/include/linux/of.h

INCLUDED FROM

#ifndef _LINUX_OF_H
#define _LINUX_OF_H
/*
 * Definitions for talking to the Open Firmware PROM on
 * Power Macintosh and other computers.
 *
 * Copyright (C) 1996-2005 Paul Mackerras.
 *
 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
 * Updates for SPARC64 by David S. Miller
 * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/mod_devicetable.h>

#include <asm/prom.h>

/* flag descriptions */
#define OF_DYNAMIC      1 /* node and properties were allocated via kmalloc */
#define OF_DETACHED     2 /* node has been detached from the device tree */

#define OF_BAD_ADDR     ((u64)-1)

extern struct device_node *of_find_node_by_name(struct device_node *from,
        const char *name);
#define for_each_node_by_name(dn, name) \
        for (dn = of_find_node_by_name(NULL, name); dn; \
             dn = of_find_node_by_name(dn, name))
extern struct device_node *of_find_node_by_type(struct device_node *from,
        const char *type);
#define for_each_node_by_type(dn, type) \
        for (dn = of_find_node_by_type(NULL, type); dn; \
             dn = of_find_node_by_type(dn, type))
extern struct device_node *of_find_compatible_node(struct device_node *from,
        const char *type, const char *compat);
#define for_each_compatible_node(dn, type, compatible) \
        for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
             dn = of_find_compatible_node(dn, type, compatible))
extern struct device_node *of_find_matching_node(struct device_node *from,
        const struct of_device_id *matches);
#define for_each_matching_node(dn, matches) \
        for (dn = of_find_matching_node(NULL, matches); dn; \
             dn = of_find_matching_node(dn, matches))
extern struct device_node *of_find_node_by_path(const char *path);
extern struct device_node *of_find_node_by_phandle(phandle handle);
extern struct device_node *of_get_parent(const struct device_node *node);
extern struct device_node *of_get_next_parent(struct device_node *node);
extern struct device_node *of_get_next_child(const struct device_node *node,
                                             struct device_node *prev);
#define for_each_child_of_node(parent, child) \
        for (child = of_get_next_child(parent, NULL); child != NULL; \
             child = of_get_next_child(parent, child))

extern struct property *of_find_property(const struct device_node *np,
                                         const char *name,
                                         int *lenp);
extern int of_device_is_compatible(const struct device_node *device,
                                   const char *);
extern int of_device_is_available(const struct device_node *device);
extern const void *of_get_property(const struct device_node *node,
                                const char *name,
                                int *lenp);
extern int of_n_addr_cells(struct device_node *np);
extern int of_n_size_cells(struct device_node *np);
extern const struct of_device_id *of_match_node(
        const struct of_device_id *matches, const struct device_node *node);
extern int of_modalias_node(struct device_node *node, char *modalias, int len);
extern int of_parse_phandles_with_args(struct device_node *np,
        const char *list_name, const char *cells_name, int index,
        struct device_node **out_node, const void **out_args);

#endif /* _LINUX_OF_H */