TOMOYO Linux Cross Reference
Linux/include/linux/of.h

   /* SPDX-License-Identifier: GPL-2.0+ */
   #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.
   */
  #include <linux/types.h>
  #include <linux/bitops.h>
  #include <linux/cleanup.h>
  #include <linux/errno.h>
  #include <linux/kobject.h>
  #include <linux/mod_devicetable.h>
  #include <linux/property.h>
  #include <linux/list.h>
  
  #include <asm/byteorder.h>
  
  typedef u32 phandle;
  typedef u32 ihandle;
  
  struct property {
          char    *name;
          int     length;
          void    *value;
          struct property *next;
  #if defined(CONFIG_OF_DYNAMIC) || defined(CONFIG_SPARC)
          unsigned long _flags;
  #endif
  #if defined(CONFIG_OF_PROMTREE)
          unsigned int unique_id;
  #endif
  #if defined(CONFIG_OF_KOBJ)
          struct bin_attribute attr;
  #endif
  };
  
  #if defined(CONFIG_SPARC)
  struct of_irq_controller;
  #endif
  
  struct device_node {
          const char *name;
          phandle phandle;
          const char *full_name;
          struct fwnode_handle fwnode;
  
          struct  property *properties;
          struct  property *deadprops;    /* removed properties */
          struct  device_node *parent;
          struct  device_node *child;
          struct  device_node *sibling;
  #if defined(CONFIG_OF_KOBJ)
          struct  kobject kobj;
  #endif
          unsigned long _flags;
          void    *data;
  #if defined(CONFIG_SPARC)
          unsigned int unique_id;
          struct of_irq_controller *irq_trans;
  #endif
  };
  
  #define MAX_PHANDLE_ARGS 16
  struct of_phandle_args {
          struct device_node *np;
          int args_count;
          uint32_t args[MAX_PHANDLE_ARGS];
  };
  
  struct of_phandle_iterator {
          /* Common iterator information */
          const char *cells_name;
          int cell_count;
          const struct device_node *parent;
  
          /* List size information */
          const __be32 *list_end;
          const __be32 *phandle_end;
  
          /* Current position state */
          const __be32 *cur;
          uint32_t cur_count;
          phandle phandle;
          struct device_node *node;
  };
  
  struct of_reconfig_data {
          struct device_node      *dn;
          struct property         *prop;
          struct property         *old_prop;
  };
  
 extern const struct kobj_type of_node_ktype;
 extern const struct fwnode_operations of_fwnode_ops;
 
 /**
  * of_node_init - initialize a devicetree node
  * @node: Pointer to device node that has been created by kzalloc()
  *
  * On return the device_node refcount is set to one.  Use of_node_put()
  * on @node when done to free the memory allocated for it.  If the node
  * is NOT a dynamic node the memory will not be freed. The decision of
  * whether to free the memory will be done by node->release(), which is
  * of_node_release().
  */
 static inline void of_node_init(struct device_node *node)
 {
 #if defined(CONFIG_OF_KOBJ)
         kobject_init(&node->kobj, &of_node_ktype);
 #endif
         fwnode_init(&node->fwnode, &of_fwnode_ops);
 }
 
 #if defined(CONFIG_OF_KOBJ)
 #define of_node_kobj(n) (&(n)->kobj)
 #else
 #define of_node_kobj(n) NULL
 #endif
 
 #ifdef CONFIG_OF_DYNAMIC
 extern struct device_node *of_node_get(struct device_node *node);
 extern void of_node_put(struct device_node *node);
 #else /* CONFIG_OF_DYNAMIC */
 /* Dummy ref counting routines - to be implemented later */
 static inline struct device_node *of_node_get(struct device_node *node)
 {
         return node;
 }
 static inline void of_node_put(struct device_node *node) { }
 #endif /* !CONFIG_OF_DYNAMIC */
 DEFINE_FREE(device_node, struct device_node *, if (_T) of_node_put(_T))
 
 /* Pointer for first entry in chain of all nodes. */
 extern struct device_node *of_root;
 extern struct device_node *of_chosen;
 extern struct device_node *of_aliases;
 extern struct device_node *of_stdout;
 
 /*
  * struct device_node flag descriptions
  * (need to be visible even when !CONFIG_OF)
  */
 #define OF_DYNAMIC              1 /* (and properties) allocated via kmalloc */
 #define OF_DETACHED             2 /* detached from the device tree */
 #define OF_POPULATED            3 /* device already created */
 #define OF_POPULATED_BUS        4 /* platform bus created for children */
 #define OF_OVERLAY              5 /* allocated for an overlay */
 #define OF_OVERLAY_FREE_CSET    6 /* in overlay cset being freed */
 
 #define OF_BAD_ADDR     ((u64)-1)
 
 #ifdef CONFIG_OF
 void of_core_init(void);
 
 static inline bool is_of_node(const struct fwnode_handle *fwnode)
 {
         return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &of_fwnode_ops;
 }
 
 #define to_of_node(__fwnode)                                            \
         ({                                                              \
                 typeof(__fwnode) __to_of_node_fwnode = (__fwnode);      \
                                                                         \
                 is_of_node(__to_of_node_fwnode) ?                       \
                         container_of(__to_of_node_fwnode,               \
                                      struct device_node, fwnode) :      \
                         NULL;                                           \
         })
 
 #define of_fwnode_handle(node)                                          \
         ({                                                              \
                 typeof(node) __of_fwnode_handle_node = (node);          \
                                                                         \
                 __of_fwnode_handle_node ?                               \
                         &__of_fwnode_handle_node->fwnode : NULL;        \
         })
 
 static inline bool of_node_is_root(const struct device_node *node)
 {
         return node && (node->parent == NULL);
 }
 
 static inline int of_node_check_flag(const struct device_node *n, unsigned long flag)
 {
         return test_bit(flag, &n->_flags);
 }
 
 static inline int of_node_test_and_set_flag(struct device_node *n,
                                             unsigned long flag)
 {
         return test_and_set_bit(flag, &n->_flags);
 }
 
 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
 {
         set_bit(flag, &n->_flags);
 }
 
 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
 {
         clear_bit(flag, &n->_flags);
 }
 
 #if defined(CONFIG_OF_DYNAMIC) || defined(CONFIG_SPARC)
 static inline int of_property_check_flag(const struct property *p, unsigned long flag)
 {
         return test_bit(flag, &p->_flags);
 }
 
 static inline void of_property_set_flag(struct property *p, unsigned long flag)
 {
         set_bit(flag, &p->_flags);
 }
 
 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
 {
         clear_bit(flag, &p->_flags);
 }
 #endif
 
 extern struct device_node *__of_find_all_nodes(struct device_node *prev);
 extern struct device_node *of_find_all_nodes(struct device_node *prev);
 
 /*
  * OF address retrieval & translation
  */
 
 /* Helper to read a big number; size is in cells (not bytes) */
 static inline u64 of_read_number(const __be32 *cell, int size)
 {
         u64 r = 0;
         for (; size--; cell++)
                 r = (r << 32) | be32_to_cpu(*cell);
         return r;
 }
 
 /* Like of_read_number, but we want an unsigned long result */
 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
 {
         /* toss away upper bits if unsigned long is smaller than u64 */
         return of_read_number(cell, size);
 }
 
 #if defined(CONFIG_SPARC)
 #include <asm/prom.h>
 #endif
 
 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
 
 extern bool of_node_name_eq(const struct device_node *np, const char *name);
 extern bool of_node_name_prefix(const struct device_node *np, const char *prefix);
 
 static inline const char *of_node_full_name(const struct device_node *np)
 {
         return np ? np->full_name : "<no-node>";
 }
 
 #define for_each_of_allnodes_from(from, dn) \
         for (dn = __of_find_all_nodes(from); dn; dn = __of_find_all_nodes(dn))
 #define for_each_of_allnodes(dn) for_each_of_allnodes_from(NULL, dn)
 extern struct device_node *of_find_node_by_name(struct device_node *from,
         const char *name);
 extern struct device_node *of_find_node_by_type(struct device_node *from,
         const char *type);
 extern struct device_node *of_find_compatible_node(struct device_node *from,
         const char *type, const char *compat);
 extern struct device_node *of_find_matching_node_and_match(
         struct device_node *from,
         const struct of_device_id *matches,
         const struct of_device_id **match);
 
 extern struct device_node *of_find_node_opts_by_path(const char *path,
         const char **opts);
 static inline struct device_node *of_find_node_by_path(const char *path)
 {
         return of_find_node_opts_by_path(path, NULL);
 }
 
 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);
 extern struct device_node *of_get_next_available_child(
         const struct device_node *node, struct device_node *prev);
 extern struct device_node *of_get_next_reserved_child(
         const struct device_node *node, struct device_node *prev);
 
 extern struct device_node *of_get_compatible_child(const struct device_node *parent,
                                         const char *compatible);
 extern struct device_node *of_get_child_by_name(const struct device_node *node,
                                         const char *name);
 
 /* cache lookup */
 extern struct device_node *of_find_next_cache_node(const struct device_node *);
 extern int of_find_last_cache_level(unsigned int cpu);
 extern struct device_node *of_find_node_with_property(
         struct device_node *from, const char *prop_name);
 
 extern struct property *of_find_property(const struct device_node *np,
                                          const char *name,
                                          int *lenp);
 extern int of_property_count_elems_of_size(const struct device_node *np,
                                 const char *propname, int elem_size);
 extern int of_property_read_u32_index(const struct device_node *np,
                                        const char *propname,
                                        u32 index, u32 *out_value);
 extern int of_property_read_u64_index(const struct device_node *np,
                                        const char *propname,
                                        u32 index, u64 *out_value);
 extern int of_property_read_variable_u8_array(const struct device_node *np,
                                         const char *propname, u8 *out_values,
                                         size_t sz_min, size_t sz_max);
 extern int of_property_read_variable_u16_array(const struct device_node *np,
                                         const char *propname, u16 *out_values,
                                         size_t sz_min, size_t sz_max);
 extern int of_property_read_variable_u32_array(const struct device_node *np,
                                         const char *propname,
                                         u32 *out_values,
                                         size_t sz_min,
                                         size_t sz_max);
 extern int of_property_read_u64(const struct device_node *np,
                                 const char *propname, u64 *out_value);
 extern int of_property_read_variable_u64_array(const struct device_node *np,
                                         const char *propname,
                                         u64 *out_values,
                                         size_t sz_min,
                                         size_t sz_max);
 
 extern int of_property_read_string(const struct device_node *np,
                                    const char *propname,
                                    const char **out_string);
 extern int of_property_match_string(const struct device_node *np,
                                     const char *propname,
                                     const char *string);
 extern int of_property_read_string_helper(const struct device_node *np,
                                               const char *propname,
                                               const char **out_strs, size_t sz, int index);
 extern int of_device_is_compatible(const struct device_node *device,
                                    const char *);
 extern int of_device_compatible_match(const struct device_node *device,
                                       const char *const *compat);
 extern bool of_device_is_available(const struct device_node *device);
 extern bool of_device_is_big_endian(const struct device_node *device);
 extern const void *of_get_property(const struct device_node *node,
                                 const char *name,
                                 int *lenp);
 extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
 extern struct device_node *of_cpu_device_node_get(int cpu);
 extern int of_cpu_node_to_id(struct device_node *np);
 extern struct device_node *of_get_next_cpu_node(struct device_node *prev);
 extern struct device_node *of_get_cpu_state_node(struct device_node *cpu_node,
                                                  int index);
 extern u64 of_get_cpu_hwid(struct device_node *cpun, unsigned int thread);
 
 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 const void *of_device_get_match_data(const struct device *dev);
 extern int of_alias_from_compatible(const struct device_node *node, char *alias,
                                     int len);
 extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
 extern int __of_parse_phandle_with_args(const struct device_node *np,
         const char *list_name, const char *cells_name, int cell_count,
         int index, struct of_phandle_args *out_args);
 extern int of_parse_phandle_with_args_map(const struct device_node *np,
         const char *list_name, const char *stem_name, int index,
         struct of_phandle_args *out_args);
 extern int of_count_phandle_with_args(const struct device_node *np,
         const char *list_name, const char *cells_name);
 
 /* module functions */
 extern ssize_t of_modalias(const struct device_node *np, char *str, ssize_t len);
 extern int of_request_module(const struct device_node *np);
 
 /* phandle iterator functions */
 extern int of_phandle_iterator_init(struct of_phandle_iterator *it,
                                     const struct device_node *np,
                                     const char *list_name,
                                     const char *cells_name,
                                     int cell_count);
 
 extern int of_phandle_iterator_next(struct of_phandle_iterator *it);
 extern int of_phandle_iterator_args(struct of_phandle_iterator *it,
                                     uint32_t *args,
                                     int size);
 
 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
 extern int of_alias_get_id(struct device_node *np, const char *stem);
 extern int of_alias_get_highest_id(const char *stem);
 
 bool of_machine_compatible_match(const char *const *compats);
 
 /**
  * of_machine_is_compatible - Test root of device tree for a given compatible value
  * @compat: compatible string to look for in root node's compatible property.
  *
  * Return: true if the root node has the given value in its compatible property.
  */
 static inline bool of_machine_is_compatible(const char *compat)
 {
         const char *compats[] = { compat, NULL };
 
         return of_machine_compatible_match(compats);
 }
 
 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);
 
 /* For updating the device tree at runtime */
 #define OF_RECONFIG_ATTACH_NODE         0x0001
 #define OF_RECONFIG_DETACH_NODE         0x0002
 #define OF_RECONFIG_ADD_PROPERTY        0x0003
 #define OF_RECONFIG_REMOVE_PROPERTY     0x0004
 #define OF_RECONFIG_UPDATE_PROPERTY     0x0005
 
 extern int of_attach_node(struct device_node *);
 extern int of_detach_node(struct device_node *);
 
 #define of_match_ptr(_ptr)      (_ptr)
 
 /*
  * u32 u;
  *
  * of_property_for_each_u32(np, "propname", u)
  *         printk("U32 value: %x\n", u);
  */
 const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
                                u32 *pu);
 /*
  * struct property *prop;
  * const char *s;
  *
  * of_property_for_each_string(np, "propname", prop, s)
  *         printk("String value: %s\n", s);
  */
 const char *of_prop_next_string(struct property *prop, const char *cur);
 
 bool of_console_check(struct device_node *dn, char *name, int index);
 
 int of_map_id(struct device_node *np, u32 id,
                const char *map_name, const char *map_mask_name,
                struct device_node **target, u32 *id_out);
 
 phys_addr_t of_dma_get_max_cpu_address(struct device_node *np);
 
 struct kimage;
 void *of_kexec_alloc_and_setup_fdt(const struct kimage *image,
                                    unsigned long initrd_load_addr,
                                    unsigned long initrd_len,
                                    const char *cmdline, size_t extra_fdt_size);
 #else /* CONFIG_OF */
 
 static inline void of_core_init(void)
 {
 }
 
 static inline bool is_of_node(const struct fwnode_handle *fwnode)
 {
         return false;
 }
 
 static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode)
 {
         return NULL;
 }
 
 static inline bool of_node_name_eq(const struct device_node *np, const char *name)
 {
         return false;
 }
 
 static inline bool of_node_name_prefix(const struct device_node *np, const char *prefix)
 {
         return false;
 }
 
 static inline const char* of_node_full_name(const struct device_node *np)
 {
         return "<no-node>";
 }
 
 static inline struct device_node *of_find_node_by_name(struct device_node *from,
         const char *name)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_node_by_type(struct device_node *from,
         const char *type)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_matching_node_and_match(
         struct device_node *from,
         const struct of_device_id *matches,
         const struct of_device_id **match)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_node_by_path(const char *path)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_node_opts_by_path(const char *path,
         const char **opts)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_node_by_phandle(phandle handle)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_parent(const struct device_node *node)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_next_parent(struct device_node *node)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_next_child(
         const struct device_node *node, struct device_node *prev)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_next_available_child(
         const struct device_node *node, struct device_node *prev)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_next_reserved_child(
         const struct device_node *node, struct device_node *prev)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_node_with_property(
         struct device_node *from, const char *prop_name)
 {
         return NULL;
 }
 
 #define of_fwnode_handle(node) NULL
 
 static inline struct device_node *of_get_compatible_child(const struct device_node *parent,
                                         const char *compatible)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_child_by_name(
                                         const struct device_node *node,
                                         const char *name)
 {
         return NULL;
 }
 
 static inline int of_device_is_compatible(const struct device_node *device,
                                           const char *name)
 {
         return 0;
 }
 
 static inline  int of_device_compatible_match(const struct device_node *device,
                                               const char *const *compat)
 {
         return 0;
 }
 
 static inline bool of_device_is_available(const struct device_node *device)
 {
         return false;
 }
 
 static inline bool of_device_is_big_endian(const struct device_node *device)
 {
         return false;
 }
 
 static inline struct property *of_find_property(const struct device_node *np,
                                                 const char *name,
                                                 int *lenp)
 {
         return NULL;
 }
 
 static inline struct device_node *of_find_compatible_node(
                                                 struct device_node *from,
                                                 const char *type,
                                                 const char *compat)
 {
         return NULL;
 }
 
 static inline int of_property_count_elems_of_size(const struct device_node *np,
                         const char *propname, int elem_size)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_u32_index(const struct device_node *np,
                         const char *propname, u32 index, u32 *out_value)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_u64_index(const struct device_node *np,
                         const char *propname, u32 index, u64 *out_value)
 {
         return -ENOSYS;
 }
 
 static inline const void *of_get_property(const struct device_node *node,
                                 const char *name,
                                 int *lenp)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_cpu_node(int cpu,
                                         unsigned int *thread)
 {
         return NULL;
 }
 
 static inline struct device_node *of_cpu_device_node_get(int cpu)
 {
         return NULL;
 }
 
 static inline int of_cpu_node_to_id(struct device_node *np)
 {
         return -ENODEV;
 }
 
 static inline struct device_node *of_get_next_cpu_node(struct device_node *prev)
 {
         return NULL;
 }
 
 static inline struct device_node *of_get_cpu_state_node(struct device_node *cpu_node,
                                         int index)
 {
         return NULL;
 }
 
 static inline int of_n_addr_cells(struct device_node *np)
 {
         return 0;
 
 }
 static inline int of_n_size_cells(struct device_node *np)
 {
         return 0;
 }
 
 static inline int of_property_read_variable_u8_array(const struct device_node *np,
                                         const char *propname, u8 *out_values,
                                         size_t sz_min, size_t sz_max)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_variable_u16_array(const struct device_node *np,
                                         const char *propname, u16 *out_values,
                                         size_t sz_min, size_t sz_max)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_variable_u32_array(const struct device_node *np,
                                         const char *propname,
                                         u32 *out_values,
                                         size_t sz_min,
                                         size_t sz_max)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_u64(const struct device_node *np,
                                        const char *propname, u64 *out_value)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_variable_u64_array(const struct device_node *np,
                                         const char *propname,
                                         u64 *out_values,
                                         size_t sz_min,
                                         size_t sz_max)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_string(const struct device_node *np,
                                           const char *propname,
                                           const char **out_string)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_match_string(const struct device_node *np,
                                            const char *propname,
                                            const char *string)
 {
         return -ENOSYS;
 }
 
 static inline int of_property_read_string_helper(const struct device_node *np,
                                                  const char *propname,
                                                  const char **out_strs, size_t sz, int index)
 {
         return -ENOSYS;
 }
 
 static inline int __of_parse_phandle_with_args(const struct device_node *np,
                                                const char *list_name,
                                                const char *cells_name,
                                                int cell_count,
                                                int index,
                                                struct of_phandle_args *out_args)
 {
         return -ENOSYS;
 }
 
 static inline int of_parse_phandle_with_args_map(const struct device_node *np,
                                                  const char *list_name,
                                                  const char *stem_name,
                                                  int index,
                                                  struct of_phandle_args *out_args)
 {
         return -ENOSYS;
 }
 
 static inline int of_count_phandle_with_args(const struct device_node *np,
                                              const char *list_name,
                                              const char *cells_name)
 {
         return -ENOSYS;
 }
 
 static inline ssize_t of_modalias(const struct device_node *np, char *str,
                                   ssize_t len)
 {
         return -ENODEV;
 }
 
 static inline int of_request_module(const struct device_node *np)
 {
         return -ENODEV;
 }
 
 static inline int of_phandle_iterator_init(struct of_phandle_iterator *it,
                                            const struct device_node *np,
                                            const char *list_name,
                                            const char *cells_name,
                                            int cell_count)
 {
         return -ENOSYS;
 }
 
 static inline int of_phandle_iterator_next(struct of_phandle_iterator *it)
 {
         return -ENOSYS;
 }
 
 static inline int of_phandle_iterator_args(struct of_phandle_iterator *it,
                                            uint32_t *args,
                                            int size)
 {
         return 0;
 }
 
 static inline int of_alias_get_id(struct device_node *np, const char *stem)
 {
         return -ENOSYS;
 }
 
 static inline int of_alias_get_highest_id(const char *stem)
 {
         return -ENOSYS;
 }
 
 static inline int of_machine_is_compatible(const char *compat)
 {
         return 0;
 }
 
 static inline int of_add_property(struct device_node *np, struct property *prop)
 {
         return 0;
 }
 
 static inline int of_remove_property(struct device_node *np, struct property *prop)
 {
         return 0;
 }
 
 static inline bool of_machine_compatible_match(const char *const *compats)
 {
         return false;
 }
 
 static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
 {
         return false;
 }
 
 static inline const __be32 *of_prop_next_u32(struct property *prop,
                 const __be32 *cur, u32 *pu)
 {
         return NULL;
 }
 
 static inline const char *of_prop_next_string(struct property *prop,
                 const char *cur)
 {
         return NULL;
 }
 
 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
 {
         return 0;
 }
 
 static inline int of_node_test_and_set_flag(struct device_node *n,
                                             unsigned long flag)
 {
         return 0;
 }
 
 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
 {
 }
 
 static inline void of_node_clear_flag(struct device_node *n, unsigned long flag)
 {
 }
 
 static inline int of_property_check_flag(const struct property *p,
                                          unsigned long flag)
 {
         return 0;
 }
 
 static inline void of_property_set_flag(struct property *p, unsigned long flag)
 {
 }
 
 static inline void of_property_clear_flag(struct property *p, unsigned long flag)
 {
 }
 
 static inline int of_map_id(struct device_node *np, u32 id,
                              const char *map_name, const char *map_mask_name,
                              struct device_node **target, u32 *id_out)
 {
         return -EINVAL;
 }
 
 static inline phys_addr_t of_dma_get_max_cpu_address(struct device_node *np)
 {
         return PHYS_ADDR_MAX;
 }
 
 static inline const void *of_device_get_match_data(const struct device *dev)
 {
         return NULL;
 }
 
 #define of_match_ptr(_ptr)      NULL
 #define of_match_node(_matches, _node)  NULL
 #endif /* CONFIG_OF */
 
 /* Default string compare functions, Allow arch asm/prom.h to override */
 #if !defined(of_compat_cmp)
 #define of_compat_cmp(s1, s2, l)        strcasecmp((s1), (s2))
 #define of_prop_cmp(s1, s2)             strcmp((s1), (s2))
 #define of_node_cmp(s1, s2)             strcasecmp((s1), (s2))
 #endif
 
 static inline int of_prop_val_eq(struct property *p1, struct property *p2)
 {
         return p1->length == p2->length &&
                !memcmp(p1->value, p2->value, (size_t)p1->length);
 }
 
 #define for_each_property_of_node(dn, pp) \
         for (pp = dn->properties; pp != NULL; pp = pp->next)
 
 #if defined(CONFIG_OF) && defined(CONFIG_NUMA)
 extern int of_node_to_nid(struct device_node *np);
 #else
 static inline int of_node_to_nid(struct device_node *device)
 {
         return NUMA_NO_NODE;
 }
 #endif
 
 #ifdef CONFIG_OF_NUMA
 extern int of_numa_init(void);
 #else
 static inline int of_numa_init(void)
 {
         return -ENOSYS;
 }
 #endif
 
 static inline struct device_node *of_find_matching_node(
         struct device_node *from,
         const struct of_device_id *matches)
 {
         return of_find_matching_node_and_match(from, matches, NULL);
 }
 
 static inline const char *of_node_get_device_type(const struct device_node *np)
 {
         return of_get_property(np, "device_type", NULL);
 }
 
 static inline bool of_node_is_type(const struct device_node *np, const char *type)
 {
         const char *match = of_node_get_device_type(np);
 
         return np && match && type && !strcmp(match, type);
 }
 
 /**
  * of_parse_phandle - Resolve a phandle property to a device_node pointer
  * @np: Pointer to device node holding phandle property
  * @phandle_name: Name of property holding a phandle value
  * @index: For properties holding a table of phandles, this is the index into
  *         the table
  *
  * Return: The device_node pointer with refcount incremented.  Use
  * of_node_put() on it when done.
  */
 static inline struct device_node *of_parse_phandle(const struct device_node *np,
                                                    const char *phandle_name,
                                                    int index)
 {
         struct of_phandle_args args;
 
         if (__of_parse_phandle_with_args(np, phandle_name, NULL, 0,
                                          index, &args))
                 return NULL;
 
         return args.np;
 }
 
 /**
  * of_parse_phandle_with_args() - Find a node pointed by phandle in a list
  * @np:         pointer to a device tree node containing a list
  * @list_name:  property name that contains a list
  * @cells_name: property name that specifies phandles' arguments count
  * @index:      index of a phandle to parse out
  * @out_args:   optional pointer to output arguments structure (will be filled)
  *
  * This function is useful to parse lists of phandles and their arguments.
  * Returns 0 on success and fills out_args, on error returns appropriate
  * errno value.
  *
  * Caller is responsible to call of_node_put() on the returned out_args->np
  * pointer.
  *
  * Example::
  *
  *  phandle1: node1 {
  *      #list-cells = <2>;
  *  };
  *
  *  phandle2: node2 {
  *      #list-cells = <1>;
  *  };
  *
  *  node3 {
  *      list = <&phandle1 1 2 &phandle2 3>;
  *  };
  *
  * To get a device_node of the ``node2`` node you may call this:
  * of_parse_phandle_with_args(node3, "list", "#list-cells", 1, &args);
  */
 static inline int of_parse_phandle_with_args(const struct device_node *np,
                                              const char *list_name,
                                              const char *cells_name,
                                              int index,
                                              struct of_phandle_args *out_args)
 {
         int cell_count = -1;
 
         /* If cells_name is NULL we assume a cell count of 0 */
         if (!cells_name)
                 cell_count = 0;
 
         return __of_parse_phandle_with_args(np, list_name, cells_name,
                                             cell_count, index, out_args);
 }
 
 /**
  * of_parse_phandle_with_fixed_args() - Find a node pointed by phandle in a list
  * @np:         pointer to a device tree node containing a list
  * @list_name:  property name that contains a list
  * @cell_count: number of argument cells following the phandle
  * @index:      index of a phandle to parse out
  * @out_args:   optional pointer to output arguments structure (will be filled)
  *
  * This function is useful to parse lists of phandles and their arguments.
  * Returns 0 on success and fills out_args, on error returns appropriate
  * errno value.
  *
  * Caller is responsible to call of_node_put() on the returned out_args->np
  * pointer.
  *
  * Example::
  *
  *  phandle1: node1 {
  *  };
  *
  *  phandle2: node2 {
  *  };
  *
  *  node3 {
  *      list = <&phandle1 0 2 &phandle2 2 3>;
  *  };
  *
  * To get a device_node of the ``node2`` node you may call this:
  * of_parse_phandle_with_fixed_args(node3, "list", 2, 1, &args);
  */
 static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
                                                    const char *list_name,
                                                    int cell_count,
                                                    int index,
                                                    struct of_phandle_args *out_args)
 {
         return __of_parse_phandle_with_args(np, list_name, NULL, cell_count,
                                             index, out_args);
 }
 
 /**
  * of_parse_phandle_with_optional_args() - Find a node pointed by phandle in a list
  * @np:         pointer to a device tree node containing a list
  * @list_name:  property name that contains a list
  * @cells_name: property name that specifies phandles' arguments count
  * @index:      index of a phandle to parse out
  * @out_args:   optional pointer to output arguments structure (will be filled)
  *
  * Same as of_parse_phandle_with_args() except that if the cells_name property
  * is not found, cell_count of 0 is assumed.
  *
  * This is used to useful, if you have a phandle which didn't have arguments
  * before and thus doesn't have a '#*-cells' property but is now migrated to
  * having arguments while retaining backwards compatibility.
  */
 static inline int of_parse_phandle_with_optional_args(const struct device_node *np,
                                                       const char *list_name,
                                                       const char *cells_name,
                                                       int index,
                                                       struct of_phandle_args *out_args)
 {
         return __of_parse_phandle_with_args(np, list_name, cells_name,
                                             0, index, out_args);
 }
 
 /**
  * of_phandle_args_equal() - Compare two of_phandle_args
  * @a1:         First of_phandle_args to compare
  * @a2:         Second of_phandle_args to compare
  *
  * Return: True if a1 and a2 are the same (same node pointer, same phandle
  * args), false otherwise.
  */
 static inline bool of_phandle_args_equal(const struct of_phandle_args *a1,
                                          const struct of_phandle_args *a2)
 {
         return a1->np == a2->np &&
                a1->args_count == a2->args_count &&
                !memcmp(a1->args, a2->args, sizeof(a1->args[0]) * a1->args_count);
 }
 
 /**
  * of_property_count_u8_elems - Count the number of u8 elements in a property
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  *
  * Search for a property in a device node and count the number of u8 elements
  * in it.
  *
  * Return: The number of elements on sucess, -EINVAL if the property does
  * not exist or its length does not match a multiple of u8 and -ENODATA if the
  * property does not have a value.
  */
 static inline int of_property_count_u8_elems(const struct device_node *np,
                                 const char *propname)
 {
         return of_property_count_elems_of_size(np, propname, sizeof(u8));
 }
 
 /**
  * of_property_count_u16_elems - Count the number of u16 elements in a property
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  *
  * Search for a property in a device node and count the number of u16 elements
  * in it.
  *
  * Return: The number of elements on sucess, -EINVAL if the property does
  * not exist or its length does not match a multiple of u16 and -ENODATA if the
  * property does not have a value.
  */
 static inline int of_property_count_u16_elems(const struct device_node *np,
                                 const char *propname)
 {
         return of_property_count_elems_of_size(np, propname, sizeof(u16));
 }
 
 /**
  * of_property_count_u32_elems - Count the number of u32 elements in a property
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  *
  * Search for a property in a device node and count the number of u32 elements
  * in it.
  *
  * Return: The number of elements on sucess, -EINVAL if the property does
  * not exist or its length does not match a multiple of u32 and -ENODATA if the
  * property does not have a value.
  */
 static inline int of_property_count_u32_elems(const struct device_node *np,
                                 const char *propname)
 {
         return of_property_count_elems_of_size(np, propname, sizeof(u32));
 }
 
 /**
  * of_property_count_u64_elems - Count the number of u64 elements in a property
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  *
  * Search for a property in a device node and count the number of u64 elements
  * in it.
  *
  * Return: The number of elements on sucess, -EINVAL if the property does
  * not exist or its length does not match a multiple of u64 and -ENODATA if the
  * property does not have a value.
  */
 static inline int of_property_count_u64_elems(const struct device_node *np,
                                 const char *propname)
 {
         return of_property_count_elems_of_size(np, propname, sizeof(u64));
 }
 
 /**
  * of_property_read_string_array() - Read an array of strings from a multiple
  * strings property.
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_strs:   output array of string pointers.
  * @sz:         number of array elements to read.
  *
  * Search for a property in a device tree node and retrieve a list of
  * terminated string values (pointer to data, not a copy) in that property.
  *
  * Return: If @out_strs is NULL, the number of strings in the property is returned.
  */
 static inline int of_property_read_string_array(const struct device_node *np,
                                                 const char *propname, const char **out_strs,
                                                 size_t sz)
 {
         return of_property_read_string_helper(np, propname, out_strs, sz, 0);
 }
 
 /**
  * of_property_count_strings() - Find and return the number of strings from a
  * multiple strings property.
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  *
  * Search for a property in a device tree node and retrieve the number of null
  * terminated string contain in it.
  *
  * Return: The number of strings on success, -EINVAL if the property does not
  * exist, -ENODATA if property does not have a value, and -EILSEQ if the string
  * is not null-terminated within the length of the property data.
  */
 static inline int of_property_count_strings(const struct device_node *np,
                                             const char *propname)
 {
         return of_property_read_string_helper(np, propname, NULL, 0, 0);
 }
 
 /**
  * of_property_read_string_index() - Find and read a string from a multiple
  * strings property.
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @index:      index of the string in the list of strings
  * @output:     pointer to null terminated return string, modified only if
  *              return value is 0.
  *
  * Search for a property in a device tree node and retrieve a null
  * terminated string value (pointer to data, not a copy) in the list of strings
  * contained in that property.
  *
  * Return: 0 on success, -EINVAL if the property does not exist, -ENODATA if
  * property does not have a value, and -EILSEQ if the string is not
  * null-terminated within the length of the property data.
  *
  * The out_string pointer is modified only if a valid string can be decoded.
  */
 static inline int of_property_read_string_index(const struct device_node *np,
                                                 const char *propname,
                                                 int index, const char **output)
 {
         int rc = of_property_read_string_helper(np, propname, output, 1, index);
         return rc < 0 ? rc : 0;
 }
 
 /**
  * of_property_read_bool - Find a property
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  *
  * Search for a boolean property in a device node. Usage on non-boolean
  * property types is deprecated.
  *
  * Return: true if the property exists false otherwise.
  */
 static inline bool of_property_read_bool(const struct device_node *np,
                                          const char *propname)
 {
         struct property *prop = of_find_property(np, propname, NULL);
 
         return prop ? true : false;
 }
 
 /**
  * of_property_present - Test if a property is present in a node
  * @np:         device node to search for the property.
  * @propname:   name of the property to be searched.
  *
  * Test for a property present in a device node.
  *
  * Return: true if the property exists false otherwise.
  */
 static inline bool of_property_present(const struct device_node *np, const char *propname)
 {
         return of_property_read_bool(np, propname);
 }
 
 /**
  * of_property_read_u8_array - Find and read an array of u8 from a property.
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to return value, modified only if return value is 0.
  * @sz:         number of array elements to read
  *
  * Search for a property in a device node and read 8-bit value(s) from
  * it.
  *
  * dts entry of array should be like:
  *  ``property = /bits/ 8 <0x50 0x60 0x70>;``
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_values is modified only if a valid u8 value can be decoded.
  */
 static inline int of_property_read_u8_array(const struct device_node *np,
                                             const char *propname,
                                             u8 *out_values, size_t sz)
 {
         int ret = of_property_read_variable_u8_array(np, propname, out_values,
                                                      sz, 0);
         if (ret >= 0)
                 return 0;
         else
                 return ret;
 }
 
 /**
  * of_property_read_u16_array - Find and read an array of u16 from a property.
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to return value, modified only if return value is 0.
  * @sz:         number of array elements to read
  *
  * Search for a property in a device node and read 16-bit value(s) from
  * it.
  *
  * dts entry of array should be like:
  *  ``property = /bits/ 16 <0x5000 0x6000 0x7000>;``
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_values is modified only if a valid u16 value can be decoded.
  */
 static inline int of_property_read_u16_array(const struct device_node *np,
                                              const char *propname,
                                              u16 *out_values, size_t sz)
 {
         int ret = of_property_read_variable_u16_array(np, propname, out_values,
                                                       sz, 0);
         if (ret >= 0)
                 return 0;
         else
                 return ret;
 }
 
 /**
  * of_property_read_u32_array - Find and read an array of 32 bit integers
  * from a property.
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to return value, modified only if return value is 0.
  * @sz:         number of array elements to read
  *
  * Search for a property in a device node and read 32-bit value(s) from
  * it.
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_values is modified only if a valid u32 value can be decoded.
  */
 static inline int of_property_read_u32_array(const struct device_node *np,
                                              const char *propname,
                                              u32 *out_values, size_t sz)
 {
         int ret = of_property_read_variable_u32_array(np, propname, out_values,
                                                       sz, 0);
         if (ret >= 0)
                 return 0;
         else
                 return ret;
 }
 
 /**
  * of_property_read_u64_array - Find and read an array of 64 bit integers
  * from a property.
  *
  * @np:         device node from which the property value is to be read.
  * @propname:   name of the property to be searched.
  * @out_values: pointer to return value, modified only if return value is 0.
  * @sz:         number of array elements to read
  *
  * Search for a property in a device node and read 64-bit value(s) from
  * it.
  *
  * Return: 0 on success, -EINVAL if the property does not exist,
  * -ENODATA if property does not have a value, and -EOVERFLOW if the
  * property data isn't large enough.
  *
  * The out_values is modified only if a valid u64 value can be decoded.
  */
 static inline int of_property_read_u64_array(const struct device_node *np,
                                              const char *propname,
                                              u64 *out_values, size_t sz)
 {
         int ret = of_property_read_variable_u64_array(np, propname, out_values,
                                                       sz, 0);
         if (ret >= 0)
                 return 0;
         else
                 return ret;
 }
 
 static inline int of_property_read_u8(const struct device_node *np,
                                        const char *propname,
                                        u8 *out_value)
 {
         return of_property_read_u8_array(np, propname, out_value, 1);
 }
 
 static inline int of_property_read_u16(const struct device_node *np,
                                        const char *propname,
                                        u16 *out_value)
 {
         return of_property_read_u16_array(np, propname, out_value, 1);
 }
 
 static inline int of_property_read_u32(const struct device_node *np,
                                        const char *propname,
                                        u32 *out_value)
 {
         return of_property_read_u32_array(np, propname, out_value, 1);
 }
 
 static inline int of_property_read_s32(const struct device_node *np,
                                        const char *propname,
                                        s32 *out_value)
 {
         return of_property_read_u32(np, propname, (u32*) out_value);
 }
 
 #define of_for_each_phandle(it, err, np, ln, cn, cc)                    \
         for (of_phandle_iterator_init((it), (np), (ln), (cn), (cc)),    \
              err = of_phandle_iterator_next(it);                        \
              err == 0;                                                  \
              err = of_phandle_iterator_next(it))
 
 #define of_property_for_each_u32(np, propname, u)                       \
         for (struct {struct property *prop; const __be32 *item; } _it = \
                 {of_find_property(np, propname, NULL),                  \
                  of_prop_next_u32(_it.prop, NULL, &u)};                 \
              _it.item;                                                  \
              _it.item = of_prop_next_u32(_it.prop, _it.item, &u))
 
 #define of_property_for_each_string(np, propname, prop, s)      \
         for (prop = of_find_property(np, propname, NULL),       \
                 s = of_prop_next_string(prop, NULL);            \
                 s;                                              \
                 s = of_prop_next_string(prop, s))
 
 #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))
 #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))
 #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))
 #define for_each_matching_node(dn, matches) \
         for (dn = of_find_matching_node(NULL, matches); dn; \
              dn = of_find_matching_node(dn, matches))
 #define for_each_matching_node_and_match(dn, matches, match) \
         for (dn = of_find_matching_node_and_match(NULL, matches, match); \
              dn; dn = of_find_matching_node_and_match(dn, matches, match))
 
 #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))
 
 #define for_each_child_of_node_scoped(parent, child) \
         for (struct device_node *child __free(device_node) =            \
              of_get_next_child(parent, NULL);                           \
              child != NULL;                                             \
              child = of_get_next_child(parent, child))
 
 #define for_each_available_child_of_node(parent, child) \
         for (child = of_get_next_available_child(parent, NULL); child != NULL; \
              child = of_get_next_available_child(parent, child))
 #define for_each_reserved_child_of_node(parent, child)                  \
         for (child = of_get_next_reserved_child(parent, NULL); child != NULL; \
              child = of_get_next_reserved_child(parent, child))
 
 #define for_each_available_child_of_node_scoped(parent, child) \
         for (struct device_node *child __free(device_node) =            \
              of_get_next_available_child(parent, NULL);                 \
              child != NULL;                                             \
              child = of_get_next_available_child(parent, child))
 
 #define for_each_of_cpu_node(cpu) \
         for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \
              cpu = of_get_next_cpu_node(cpu))
 
 #define for_each_node_with_property(dn, prop_name) \
         for (dn = of_find_node_with_property(NULL, prop_name); dn; \
              dn = of_find_node_with_property(dn, prop_name))
 
 static inline int of_get_child_count(const struct device_node *np)
 {
         struct device_node *child;
         int num = 0;
 
         for_each_child_of_node(np, child)
                 num++;
 
         return num;
 }
 
 static inline int of_get_available_child_count(const struct device_node *np)
 {
         struct device_node *child;
         int num = 0;
 
         for_each_available_child_of_node(np, child)
                 num++;
 
         return num;
 }
 
 #define _OF_DECLARE_STUB(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 }
 
 #if defined(CONFIG_OF) && !defined(MODULE)
 #define _OF_DECLARE(table, name, compat, fn, fn_type)                   \
         static const struct of_device_id __of_table_##name              \
                 __used __section("__" #table "_of_table")               \
                 __aligned(__alignof__(struct of_device_id))             \
                  = { .compatible = compat,                              \
                      .data = (fn == (fn_type)NULL) ? fn : fn  }
 #else
 #define _OF_DECLARE(table, name, compat, fn, fn_type)                   \
         _OF_DECLARE_STUB(table, name, compat, fn, fn_type)
 #endif
 
 typedef int (*of_init_fn_2)(struct device_node *, struct device_node *);
 typedef int (*of_init_fn_1_ret)(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_1_RET(table, name, compat, fn) \
                 _OF_DECLARE(table, name, compat, fn, of_init_fn_1_ret)
 #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;
 };
 
 enum of_reconfig_change {
         OF_RECONFIG_NO_CHANGE = 0,
         OF_RECONFIG_CHANGE_ADD,
         OF_RECONFIG_CHANGE_REMOVE,
 };
 
 struct notifier_block;
 
 #ifdef CONFIG_OF_DYNAMIC
 extern int of_reconfig_notifier_register(struct notifier_block *);
 extern int of_reconfig_notifier_unregister(struct notifier_block *);
 extern int of_reconfig_notify(unsigned long, struct of_reconfig_data *rd);
 extern int of_reconfig_get_state_change(unsigned long action,
                                         struct of_reconfig_data *arg);
 
 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);
 }
 
 struct device_node *of_changeset_create_node(struct of_changeset *ocs,
                                              struct device_node *parent,
                                              const char *full_name);
 int of_changeset_add_prop_string(struct of_changeset *ocs,
                                  struct device_node *np,
                                  const char *prop_name, const char *str);
 int of_changeset_add_prop_string_array(struct of_changeset *ocs,
                                        struct device_node *np,
                                        const char *prop_name,
                                        const char * const *str_array, size_t sz);
 int of_changeset_add_prop_u32_array(struct of_changeset *ocs,
                                     struct device_node *np,
                                     const char *prop_name,
                                     const u32 *array, size_t sz);
 static inline int of_changeset_add_prop_u32(struct of_changeset *ocs,
                                             struct device_node *np,
                                             const char *prop_name,
                                             const u32 val)
 {
         return of_changeset_add_prop_u32_array(ocs, np, prop_name, &val, 1);
 }
 
 int of_changeset_add_prop_bool(struct of_changeset *ocs, struct device_node *np,
                                const char *prop_name);
 
 #else /* CONFIG_OF_DYNAMIC */
 static inline int of_reconfig_notifier_register(struct notifier_block *nb)
 {
         return -EINVAL;
 }
 static inline int of_reconfig_notifier_unregister(struct notifier_block *nb)
 {
         return -EINVAL;
 }
 static inline int of_reconfig_notify(unsigned long action,
                                      struct of_reconfig_data *arg)
 {
         return -EINVAL;
 }
 static inline int of_reconfig_get_state_change(unsigned long action,
                                                 struct of_reconfig_data *arg)
 {
         return -EINVAL;
 }
 #endif /* CONFIG_OF_DYNAMIC */
 
 /**
  * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
  * @np: Pointer to the given device_node
  *
  * Return: true if present false otherwise
  */
 static inline bool of_device_is_system_power_controller(const struct device_node *np)
 {
         return of_property_read_bool(np, "system-power-controller");
 }
 
 /**
  * of_have_populated_dt() - Has DT been populated by bootloader
  *
  * Return: True if a DTB has been populated by the bootloader and it isn't the
  * empty builtin one. False otherwise.
  */
 static inline bool of_have_populated_dt(void)
 {
 #ifdef CONFIG_OF
         return of_property_present(of_root, "compatible");
 #else
         return false;
 #endif
 }
 
 /*
  * Overlay support
  */
 
 enum of_overlay_notify_action {
         OF_OVERLAY_INIT = 0,    /* kzalloc() of ovcs sets this value */
         OF_OVERLAY_PRE_APPLY,
         OF_OVERLAY_POST_APPLY,
         OF_OVERLAY_PRE_REMOVE,
         OF_OVERLAY_POST_REMOVE,
 };
 
 static inline const char *of_overlay_action_name(enum of_overlay_notify_action action)
 {
         static const char *const of_overlay_action_name[] = {
                 "init",
                 "pre-apply",
                 "post-apply",
                 "pre-remove",
                 "post-remove",
         };
 
         return of_overlay_action_name[action];
 }
 
 struct of_overlay_notify_data {
         struct device_node *overlay;
         struct device_node *target;
 };
 
 #ifdef CONFIG_OF_OVERLAY
 
 int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size,
                          int *ovcs_id, struct device_node *target_base);
 int of_overlay_remove(int *ovcs_id);
 int of_overlay_remove_all(void);
 
 int of_overlay_notifier_register(struct notifier_block *nb);
 int of_overlay_notifier_unregister(struct notifier_block *nb);
 
 #else
 
 static inline int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size,
                                        int *ovcs_id, struct device_node *target_base)
 {
         return -ENOTSUPP;
 }
 
 static inline int of_overlay_remove(int *ovcs_id)
 {
         return -ENOTSUPP;
 }
 
 static inline int of_overlay_remove_all(void)
 {
         return -ENOTSUPP;
 }
 
 static inline int of_overlay_notifier_register(struct notifier_block *nb)
 {
         return 0;
 }
 
 static inline int of_overlay_notifier_unregister(struct notifier_block *nb)
 {
         return 0;
 }
 
 #endif
 
 #endif /* _LINUX_OF_H */
 

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