| /* 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/errno.h> |
| #include <linux/kobject.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/spinlock.h> |
| #include <linux/topology.h> |
| #include <linux/notifier.h> |
| #include <linux/property.h> |
| #include <linux/list.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/errno.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; |
| }; |
| |
| /* initialize a node */ |
| extern struct kobj_type of_node_ktype; |
| extern const struct fwnode_operations of_fwnode_ops; |
| 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 */ |
| |
| /* 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; |
| extern raw_spinlock_t devtree_lock; |
| |
| /* |
| * 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_have_populated_dt(void) |
| { |
| return of_root != 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(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(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_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(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_get_next_cpu_node(struct device_node *prev); |
| extern struct device_node *of_get_cpu_state_node(struct device_node *cpu_node, |
| int index); |
| |
| #define for_each_property_of_node(dn, pp) \ |
| for (pp = dn->properties; pp != NULL; pp = pp->next) |
| |
| 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 int of_modalias_node(struct device_node *node, char *modalias, int len); |
| extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args); |
| extern struct device_node *of_parse_phandle(const struct device_node *np, |
| const char *phandle_name, |
| int index); |
| extern 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); |
| 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_parse_phandle_with_fixed_args(const struct device_node *np, |
| const char *list_name, int cells_count, 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); |
| |
| /* 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); |
| extern int of_alias_get_alias_list(const struct of_device_id *matches, |
| const char *stem, unsigned long *bitmap, |
| unsigned int nbits); |
| |
| extern int of_machine_is_compatible(const char *compat); |
| |
| 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) |
| |
| /** |
| * 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. Returns 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. |
| * |
| * dts entry of array should be like: |
| * property = /bits/ 8 <0x50 0x60 0x70>; |
| * |
| * 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. Returns 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. |
| * |
| * dts entry of array should be like: |
| * property = /bits/ 16 <0x5000 0x6000 0x7000>; |
| * |
| * 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. Returns 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. Returns 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; |
| } |
| |
| /* |
| * struct property *prop; |
| * const __be32 *p; |
| * u32 u; |
| * |
| * of_property_for_each_u32(np, "propname", prop, p, 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); |
| |
| extern int of_cpu_node_to_id(struct device_node *np); |
| |
| 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); |
| |
| #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_find_node_with_property( |
| struct device_node *from, const char *prop_name) |
| { |
| return NULL; |
| } |
| |
| #define of_fwnode_handle(node) NULL |
| |
| static inline bool of_have_populated_dt(void) |
| { |
| return false; |
| } |
| |
| 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(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_u8_array(const struct device_node *np, |
| const char *propname, u8 *out_values, size_t sz) |
| { |
| return -ENOSYS; |
| } |
| |
| static inline int of_property_read_u16_array(const struct device_node *np, |
| const char *propname, u16 *out_values, size_t sz) |
| { |
| return -ENOSYS; |
| } |
| |
| static inline int of_property_read_u32_array(const struct device_node *np, |
| const char *propname, |
| u32 *out_values, size_t sz) |
| { |
| return -ENOSYS; |
| } |
| |
| static inline int of_property_read_u64_array(const struct device_node *np, |
| const char *propname, |
| u64 *out_values, size_t sz) |
| { |
| 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_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 struct device_node *of_parse_phandle(const struct device_node *np, |
| const char *phandle_name, |
| int index) |
| { |
| return NULL; |
| } |
| |
| 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) |
| { |
| 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_parse_phandle_with_fixed_args(const struct device_node *np, |
| const char *list_name, int cells_count, int index, |
| struct of_phandle_args *out_args) |
| { |
| return -ENOSYS; |
| } |
| |
| static inline int of_count_phandle_with_args(struct device_node *np, |
| const char *list_name, |
| const char *cells_name) |
| { |
| return -ENOSYS; |
| } |
| |
| 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_alias_get_alias_list(const struct of_device_id *matches, |
| const char *stem, unsigned long *bitmap, |
| unsigned int nbits) |
| { |
| return -ENOSYS; |
| } |
| |
| static inline int of_machine_is_compatible(const char *compat) |
| { |
| return 0; |
| } |
| |
| static inline int of_remove_property(struct device_node *np, struct property *prop) |
| { |
| return 0; |
| } |
| |
| 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(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_cpu_node_to_id(struct device_node *np) |
| { |
| return -ENODEV; |
| } |
| |
| 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; |
| } |
| |
| #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); |
| } |
| |
| #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_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. Returns 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. Returns 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. Returns 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. Returns 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. |
| * |
| * 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. Returns 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 |
| * @out_string: 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. |
| * Returns 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 property in a device node. |
| * Returns 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; |
| } |
| |
| 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, prop, p, u) \ |
| for (prop = of_find_property(np, propname, NULL), \ |
| p = of_prop_next_u32(prop, NULL, &u); \ |
| p; \ |
| p = of_prop_next_u32(prop, p, &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_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_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; |
| } |
| |
| #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) \ |
| 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 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, |
| }; |
| |
| #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); |
| } |
| #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"); |
| } |
| |
| /** |
| * Overlay support |
| */ |
| |
| enum of_overlay_notify_action { |
| OF_OVERLAY_PRE_APPLY = 0, |
| OF_OVERLAY_POST_APPLY, |
| OF_OVERLAY_PRE_REMOVE, |
| OF_OVERLAY_POST_REMOVE, |
| }; |
| |
| 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); |
| 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(void *overlay_fdt, u32 overlay_fdt_size, |
| int *ovcs_id) |
| { |
| 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 */ |