259092a35c
Currently, devicetree reconfig notifiers get emitted before the change is applied to the tree, but that behaviour is problematic if the receiver wants the determine the new state of the tree. The current users don't care, but the changeset code to follow will be making multiple changes at once. Reorder notifiers to get emitted after the change has been applied to the tree so that callbacks see the new tree state. At the same time, fixup the existing callbacks to expect the new order. There are a few callbacks that compare the old and new values of a changed property. Put both property pointers into the of_prop_reconfig structure. The current notifiers also allow the notifier callback to fail and cancel the change to the tree, but that feature isn't actually used. It really isn't valid to ignore a tree modification provided by firmware anyway, so remove the ability to cancel a change to the tree. Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Nathan Fontenot <nfont@austin.ibm.com>
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
#ifndef _LINUX_OF_PRIVATE_H
|
|
#define _LINUX_OF_PRIVATE_H
|
|
/*
|
|
* Private symbols used by OF support code
|
|
*
|
|
* Paul Mackerras August 1996.
|
|
* Copyright (C) 1996-2005 Paul Mackerras.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* struct alias_prop - Alias property in 'aliases' node
|
|
* @link: List node to link the structure in aliases_lookup list
|
|
* @alias: Alias property name
|
|
* @np: Pointer to device_node that the alias stands for
|
|
* @id: Index value from end of alias name
|
|
* @stem: Alias string without the index
|
|
*
|
|
* The structure represents one alias property of 'aliases' node as
|
|
* an entry in aliases_lookup list.
|
|
*/
|
|
struct alias_prop {
|
|
struct list_head link;
|
|
const char *alias;
|
|
struct device_node *np;
|
|
int id;
|
|
char stem[0];
|
|
};
|
|
|
|
extern struct mutex of_mutex;
|
|
extern struct list_head aliases_lookup;
|
|
extern struct kset *of_kset;
|
|
|
|
|
|
static inline struct device_node *kobj_to_device_node(struct kobject *kobj)
|
|
{
|
|
return container_of(kobj, struct device_node, kobj);
|
|
}
|
|
|
|
#if defined(CONFIG_OF_DYNAMIC)
|
|
extern int of_property_notify(int action, struct device_node *np,
|
|
struct property *prop, struct property *old_prop);
|
|
extern void of_node_release(struct kobject *kobj);
|
|
#else /* CONFIG_OF_DYNAMIC */
|
|
static inline int of_property_notify(int action, struct device_node *np,
|
|
struct property *prop, struct property *old_prop)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_OF_DYNAMIC */
|
|
|
|
/**
|
|
* General utilities for working with live trees.
|
|
*
|
|
* All functions with two leading underscores operate
|
|
* without taking node references, so you either have to
|
|
* own the devtree lock or work on detached trees only.
|
|
*/
|
|
struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags);
|
|
struct device_node *__of_node_alloc(const char *full_name, gfp_t allocflags);
|
|
|
|
extern const void *__of_get_property(const struct device_node *np,
|
|
const char *name, int *lenp);
|
|
extern int __of_add_property(struct device_node *np, struct property *prop);
|
|
extern int __of_add_property_sysfs(struct device_node *np,
|
|
struct property *prop);
|
|
extern int __of_remove_property(struct device_node *np, struct property *prop);
|
|
extern void __of_remove_property_sysfs(struct device_node *np,
|
|
struct property *prop);
|
|
extern int __of_update_property(struct device_node *np,
|
|
struct property *newprop, struct property **oldprop);
|
|
extern void __of_update_property_sysfs(struct device_node *np,
|
|
struct property *newprop, struct property *oldprop);
|
|
|
|
extern void __of_attach_node(struct device_node *np);
|
|
extern int __of_attach_node_sysfs(struct device_node *np);
|
|
extern void __of_detach_node(struct device_node *np);
|
|
extern void __of_detach_node_sysfs(struct device_node *np);
|
|
|
|
#endif /* _LINUX_OF_PRIVATE_H */
|