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Diffstat (limited to 'drivers/of/of_private.h')
| -rw-r--r-- | drivers/of/of_private.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h new file mode 100644 index 000000000..fb6792d38 --- /dev/null +++ b/drivers/of/of_private.h @@ -0,0 +1,175 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +#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. + */ + +#define FDT_ALIGN_SIZE 8 + +/** + * 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[]; +}; + +#if defined(CONFIG_SPARC) +#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 2 +#else +#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 +#endif + +#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 + +extern struct mutex of_mutex; +extern struct list_head aliases_lookup; +extern struct kset *of_kset; + +#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); +extern int __of_changeset_apply_entries(struct of_changeset *ocs, + int *ret_revert); +extern int __of_changeset_apply_notify(struct of_changeset *ocs); +extern int __of_changeset_revert_entries(struct of_changeset *ocs, + int *ret_apply); +extern int __of_changeset_revert_notify(struct of_changeset *ocs); +#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 */ + +#if defined(CONFIG_OF_KOBJ) +int of_node_is_attached(const struct device_node *node); +int __of_add_property_sysfs(struct device_node *np, struct property *pp); +void __of_remove_property_sysfs(struct device_node *np, struct property *prop); +void __of_update_property_sysfs(struct device_node *np, struct property *newprop, + struct property *oldprop); +int __of_attach_node_sysfs(struct device_node *np); +void __of_detach_node_sysfs(struct device_node *np); +#else +static inline int __of_add_property_sysfs(struct device_node *np, struct property *pp) +{ + return 0; +} +static inline void __of_remove_property_sysfs(struct device_node *np, struct property *prop) {} +static inline void __of_update_property_sysfs(struct device_node *np, + struct property *newprop, struct property *oldprop) {} +static inline int __of_attach_node_sysfs(struct device_node *np) +{ + return 0; +} +static inline void __of_detach_node_sysfs(struct device_node *np) {} +#endif + +#if defined(CONFIG_OF_RESOLVE) +int of_resolve_phandles(struct device_node *tree); +#endif + +void __of_phandle_cache_inv_entry(phandle handle); + +#if defined(CONFIG_OF_OVERLAY) +void of_overlay_mutex_lock(void); +void of_overlay_mutex_unlock(void); +#else +static inline void of_overlay_mutex_lock(void) {}; +static inline void of_overlay_mutex_unlock(void) {}; +#endif + +#if defined(CONFIG_OF_UNITTEST) && defined(CONFIG_OF_OVERLAY) +extern void __init unittest_unflatten_overlay_base(void); +#else +static inline void unittest_unflatten_overlay_base(void) {}; +#endif + +extern void *__unflatten_device_tree(const void *blob, + struct device_node *dad, + struct device_node **mynodes, + void *(*dt_alloc)(u64 size, u64 align), + bool detached); + +/** + * 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_dup(const struct device_node *np, + const char *full_name); + +struct device_node *__of_find_node_by_path(struct device_node *parent, + const char *path); +struct device_node *__of_find_node_by_full_path(struct device_node *node, + const char *path); + +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_remove_property(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_detach_node(struct device_node *np); + +extern void __of_sysfs_remove_bin_file(struct device_node *np, + struct property *prop); + +/* illegal phandle value (set when unresolved) */ +#define OF_PHANDLE_ILLEGAL 0xdeadbeef + +/* iterators for transactions, used for overlays */ +/* forward iterator */ +#define for_each_transaction_entry(_oft, _te) \ + list_for_each_entry(_te, &(_oft)->te_list, node) + +/* reverse iterator */ +#define for_each_transaction_entry_reverse(_oft, _te) \ + list_for_each_entry_reverse(_te, &(_oft)->te_list, node) + +extern int of_bus_n_addr_cells(struct device_node *np); +extern int of_bus_n_size_cells(struct device_node *np); + +struct bus_dma_region; +#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_HAS_DMA) +int of_dma_get_range(struct device_node *np, + const struct bus_dma_region **map); +struct device_node *__of_get_dma_parent(const struct device_node *np); +#else +static inline int of_dma_get_range(struct device_node *np, + const struct bus_dma_region **map) +{ + return -ENODEV; +} +static inline struct device_node *__of_get_dma_parent(const struct device_node *np) +{ + return of_get_parent(np); +} +#endif + +void fdt_init_reserved_mem(void); +void fdt_reserved_mem_save_node(unsigned long node, const char *uname, + phys_addr_t base, phys_addr_t size); + +#endif /* _LINUX_OF_PRIVATE_H */ |