diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/of.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h index 689e26274cf0..ae091484bf74 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -751,4 +751,102 @@ static inline int of_get_available_child_count(const struct device_node *np) return num; } +#ifdef CONFIG_OF +#define _OF_DECLARE(table, name, compat, fn, fn_type) \ + static const struct of_device_id __of_table_##name \ + __used __section(__##table##_of_table) \ + = { .compatible = compat, \ + .data = (fn == (fn_type)NULL) ? fn : fn } +#else +#define _OF_DECLARE(table, name, compat, fn, fn_type) \ + static const struct of_device_id __of_table_##name \ + __attribute__((unused)) \ + = { .compatible = compat, \ + .data = (fn == (fn_type)NULL) ? fn : fn } +#endif + +typedef int (*of_init_fn_2)(struct device_node *, struct device_node *); +typedef void (*of_init_fn_1)(struct device_node *); + +#define OF_DECLARE_1(table, name, compat, fn) \ + _OF_DECLARE(table, name, compat, fn, of_init_fn_1) +#define OF_DECLARE_2(table, name, compat, fn) \ + _OF_DECLARE(table, name, compat, fn, of_init_fn_2) + +/** + * struct of_changeset_entry - Holds a changeset entry + * + * @node: list_head for the log list + * @action: notifier action + * @np: pointer to the device node affected + * @prop: pointer to the property affected + * @old_prop: hold a pointer to the original property + * + * Every modification of the device tree during a changeset + * is held in a list of of_changeset_entry structures. + * That way we can recover from a partial application, or we can + * revert the changeset + */ +struct of_changeset_entry { + struct list_head node; + unsigned long action; + struct device_node *np; + struct property *prop; + struct property *old_prop; +}; + +/** + * struct of_changeset - changeset tracker structure + * + * @entries: list_head for the changeset entries + * + * changesets are a convenient way to apply bulk changes to the + * live tree. In case of an error, changes are rolled-back. + * changesets live on after initial application, and if not + * destroyed after use, they can be reverted in one single call. + */ +struct of_changeset { + struct list_head entries; +}; + +#ifdef CONFIG_OF_DYNAMIC +extern void of_changeset_init(struct of_changeset *ocs); +extern void of_changeset_destroy(struct of_changeset *ocs); +extern int of_changeset_apply(struct of_changeset *ocs); +extern int of_changeset_revert(struct of_changeset *ocs); +extern int of_changeset_action(struct of_changeset *ocs, + unsigned long action, struct device_node *np, + struct property *prop); + +static inline int of_changeset_attach_node(struct of_changeset *ocs, + struct device_node *np) +{ + return of_changeset_action(ocs, OF_RECONFIG_ATTACH_NODE, np, NULL); +} + +static inline int of_changeset_detach_node(struct of_changeset *ocs, + struct device_node *np) +{ + return of_changeset_action(ocs, OF_RECONFIG_DETACH_NODE, np, NULL); +} + +static inline int of_changeset_add_property(struct of_changeset *ocs, + struct device_node *np, struct property *prop) +{ + return of_changeset_action(ocs, OF_RECONFIG_ADD_PROPERTY, np, prop); +} + +static inline int of_changeset_remove_property(struct of_changeset *ocs, + struct device_node *np, struct property *prop) +{ + return of_changeset_action(ocs, OF_RECONFIG_REMOVE_PROPERTY, np, prop); +} + +static inline int of_changeset_update_property(struct of_changeset *ocs, + struct device_node *np, struct property *prop) +{ + return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); +} +#endif + #endif /* _LINUX_OF_H */ |