diff options
Diffstat (limited to 'drivers/of/of_private.h')
| -rw-r--r-- | drivers/of/of_private.h | 156 |
1 files changed, 133 insertions, 23 deletions
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index 3ae12ffbf547..df0bb00349e0 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ #ifndef _LINUX_OF_PRIVATE_H #define _LINUX_OF_PRIVATE_H /* @@ -5,13 +6,11 @@ * * 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. */ +#define FDT_ALIGN_SIZE 8 +#define MAX_RESERVED_REGIONS 64 + /** * struct alias_prop - Alias property in 'aliases' node * @link: List node to link the structure in aliases_lookup list @@ -28,25 +27,35 @@ struct alias_prop { const char *alias; struct device_node *np; int id; - char stem[0]; + 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 raw_spinlock_t devtree_lock; 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); -} +struct kunit; +extern void of_root_kunit_skip(struct kunit *test); #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(struct of_changeset *ocs); -extern int __of_changeset_revert(struct of_changeset *ocs); +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) @@ -55,6 +64,49 @@ static inline int of_property_notify(int action, struct device_node *np, } #endif /* CONFIG_OF_DYNAMIC */ +#if defined(CONFIG_OF_DYNAMIC) && defined(CONFIG_OF_ADDRESS) +void of_platform_register_reconfig_notifier(void); +#else +static inline void of_platform_register_reconfig_notifier(void) { } +#endif + +#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, const struct property *prop); +void __of_update_property_sysfs(struct device_node *np, struct property *newprop, + const 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, const struct property *prop) {} +static inline void __of_update_property_sysfs(struct device_node *np, + struct property *newprop, const 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 @@ -67,6 +119,8 @@ extern void *__unflatten_device_tree(const void *blob, void *(*dt_alloc)(u64 size, u64 align), bool detached); +void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); + /** * General utilities for working with live trees. * @@ -75,30 +129,29 @@ extern void *__unflatten_device_tree(const void *blob, * own the devtree lock or work on detached trees only. */ struct property *__of_prop_dup(const struct property *prop, gfp_t allocflags); -__printf(2, 3) struct device_node *__of_node_dup(const struct device_node *np, const char *fmt, ...); +void __of_prop_free(struct property *prop); +struct device_node *__of_node_dup(const struct device_node *np, + const char *full_name); +struct device_node *__of_find_node_by_path(const 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_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 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); extern void __of_sysfs_remove_bin_file(struct device_node *np, - struct property *prop); + const struct property *prop); + +/* illegal phandle value (set when unresolved) */ +#define OF_PHANDLE_ILLEGAL 0xdeadbeef /* iterators for transactions, used for overlays */ /* forward iterator */ @@ -109,4 +162,61 @@ extern void __of_sysfs_remove_bin_file(struct device_node *np, #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); + +const __be32 *of_irq_parse_imap_parent(const __be32 *imap, int len, + struct of_phandle_args *out_irq); + +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 + +int fdt_scan_reserved_mem(void); +void __init fdt_scan_reserved_mem_reg_nodes(void); + +bool of_fdt_device_is_available(const void *blob, unsigned long node); + +/* Max address size we deal with */ +#define OF_MAX_ADDR_CELLS 4 +#define OF_CHECK_ADDR_COUNT(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS) +#define OF_CHECK_COUNTS(na, ns) (OF_CHECK_ADDR_COUNT(na) && (ns) > 0) + +/* Debug utility */ +#ifdef DEBUG +static void __maybe_unused of_dump_addr(const char *s, const __be32 *addr, int na) +{ + pr_debug("%s", s); + while (na--) + pr_cont(" %08x", be32_to_cpu(*(addr++))); + pr_cont("\n"); +} +#else +static void __maybe_unused of_dump_addr(const char *s, const __be32 *addr, int na) { } +#endif + +static inline bool is_pseudo_property(const char *prop_name) +{ + return !of_prop_cmp(prop_name, "name") || + !of_prop_cmp(prop_name, "phandle") || + !of_prop_cmp(prop_name, "linux,phandle"); +} + +#if IS_ENABLED(CONFIG_KUNIT) +int __of_address_resource_bounds(struct resource *r, u64 start, u64 size); +#endif + #endif /* _LINUX_OF_PRIVATE_H */ |