1 /* SPDX-License-Identifier: GPL-2.0+ */
8  * Copyright (C) 1996-2005 Paul Mackerras.
22 #include <linux/property.h>
31 struct property {  struct
35 	struct property *next;  argument
57 	struct	property *properties;  argument
58 	struct	property *deadprops;	/* removed properties */
99 	struct property		*prop;
100 	struct property		*old_prop;
109 	kobject_init(&node->kobj, &of_node_ktype);  in of_node_init()
111 	fwnode_init(&node->fwnode, &of_fwnode_ops);  in of_node_init()
115 #define of_node_kobj(n) (&(n)->kobj)
124 /* Dummy ref counting routines - to be implemented later */
150 #define OF_BAD_ADDR	((u64)-1)
155 static inline bool is_of_node(const struct fwnode_handle *fwnode)  in is_of_node()
157 	return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &of_fwnode_ops;  in is_of_node()
175 			&__of_fwnode_handle_node->fwnode : NULL;	\
178 static inline bool of_have_populated_dt(void)  in of_have_populated_dt()
183 static inline bool of_node_is_root(const struct device_node *node)  in of_node_is_root()
185 	return node && (node->parent == NULL);  in of_node_is_root()
190 	return test_bit(flag, &n->_flags);  in of_node_check_flag()
196 	return test_and_set_bit(flag, &n->_flags);  in of_node_test_and_set_flag()
201 	set_bit(flag, &n->_flags);  in of_node_set_flag()
206 	clear_bit(flag, &n->_flags);  in of_node_clear_flag()
210 static inline int of_property_check_flag(struct property *p, unsigned long flag)  in of_property_check_flag()
212 	return test_bit(flag, &p->_flags);  in of_property_check_flag()
215 static inline void of_property_set_flag(struct property *p, unsigned long flag)  in of_property_set_flag()
217 	set_bit(flag, &p->_flags);  in of_property_set_flag()
220 static inline void of_property_clear_flag(struct property *p, unsigned long flag)  in of_property_clear_flag()
222 	clear_bit(flag, &p->_flags);  in of_property_clear_flag()
237 	for (; size--; cell++)  in of_read_number()
253 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
254 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
256 extern bool of_node_name_eq(const struct device_node *np, const char *name);
257 extern bool of_node_name_prefix(const struct device_node *np, const char *prefix);
261 	return np ? np->full_name : "<no-node>";  in of_node_full_name()
304 extern struct property *of_find_property(const struct device_node *np,
347 extern bool of_device_is_available(const struct device_node *device);
348 extern bool of_device_is_big_endian(const struct device_node *device);
358 	for (pp = dn->properties; pp != NULL; pp = pp->next)
402 extern int of_add_property(struct device_node *np, struct property *prop);
403 extern int of_remove_property(struct device_node *np, struct property *prop);
404 extern int of_update_property(struct device_node *np, struct property *newprop);
419  * of_property_read_u8_array - Find and read an array of u8 from a property.
421  * @np:		device node from which the property value is to be read.
422  * @propname:	name of the property to be searched.
426  * Search for a property in a device node and read 8-bit value(s) from
430  *  ``property = /bits/ 8 <0x50 0x60 0x70>;``
432  * Return: 0 on success, -EINVAL if the property does not exist,
433  * -ENODATA if property does not have a value, and -EOVERFLOW if the
434  * property data isn't large enough.
451  * of_property_read_u16_array - Find and read an array of u16 from a property.
453  * @np:		device node from which the property value is to be read.
454  * @propname:	name of the property to be searched.
458  * Search for a property in a device node and read 16-bit value(s) from
462  *  ``property = /bits/ 16 <0x5000 0x6000 0x7000>;``
464  * Return: 0 on success, -EINVAL if the property does not exist,
465  * -ENODATA if property does not have a value, and -EOVERFLOW if the
466  * property data isn't large enough.
483  * of_property_read_u32_array - Find and read an array of 32 bit integers
484  * from a property.
486  * @np:		device node from which the property value is to be read.
487  * @propname:	name of the property to be searched.
491  * Search for a property in a device node and read 32-bit value(s) from
494  * Return: 0 on success, -EINVAL if the property does not exist,
495  * -ENODATA if property does not have a value, and -EOVERFLOW if the
496  * property data isn't large enough.
513  * of_property_read_u64_array - Find and read an array of 64 bit integers
514  * from a property.
516  * @np:		device node from which the property value is to be read.
517  * @propname:	name of the property to be searched.
521  * Search for a property in a device node and read 64-bit value(s) from
524  * Return: 0 on success, -EINVAL if the property does not exist,
525  * -ENODATA if property does not have a value, and -EOVERFLOW if the
526  * property data isn't large enough.
543  * struct property *prop;
550 const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
553  * struct property *prop;
559 const char *of_prop_next_string(struct property *prop, const char *cur);
561 bool of_console_check(struct device_node *dn, char *name, int index);
584 static inline bool is_of_node(const struct fwnode_handle *fwnode)  in is_of_node()
594 static inline bool of_node_name_eq(const struct device_node *np, const char *name)  in of_node_name_eq()
599 static inline bool of_node_name_prefix(const struct device_node *np, const char *prefix)  in of_node_name_prefix()
606 	return "<no-node>";  in of_node_full_name()
675 static inline bool of_have_populated_dt(void)  in of_have_populated_dt()
705 static inline bool of_device_is_available(const struct device_node *device)  in of_device_is_available()
710 static inline bool of_device_is_big_endian(const struct device_node *device)  in of_device_is_big_endian()
715 static inline struct property *of_find_property(const struct device_node *np,  in of_find_property()
733 	return -ENOSYS;  in of_property_count_elems_of_size()
739 	return -ENOSYS;  in of_property_read_u8_array()
745 	return -ENOSYS;  in of_property_read_u16_array()
752 	return -ENOSYS;  in of_property_read_u32_array()
759 	return -ENOSYS;  in of_property_read_u64_array()
765 	return -ENOSYS;  in of_property_read_u32_index()
771 	return -ENOSYS;  in of_property_read_u64_index()
812 	return -ENOSYS;  in of_property_read_variable_u8_array()
819 	return -ENOSYS;  in of_property_read_variable_u16_array()
828 	return -ENOSYS;  in of_property_read_variable_u32_array()
834 	return -ENOSYS;  in of_property_read_u64()
843 	return -ENOSYS;  in of_property_read_variable_u64_array()
850 	return -ENOSYS;  in of_property_read_string()
857 	return -ENOSYS;  in of_property_match_string()
864 	return -ENOSYS;  in of_property_read_string_helper()
880 	return -ENOSYS;  in of_parse_phandle_with_args()
889 	return -ENOSYS;  in of_parse_phandle_with_args_map()
896 	return -ENOSYS;  in of_parse_phandle_with_fixed_args()
903 	return -ENOSYS;  in of_count_phandle_with_args()
912 	return -ENOSYS;  in of_phandle_iterator_init()
917 	return -ENOSYS;  in of_phandle_iterator_next()
929 	return -ENOSYS;  in of_alias_get_id()
934 	return -ENOSYS;  in of_alias_get_highest_id()
941 	return -ENOSYS;  in of_alias_get_alias_list()
949 static inline int of_add_property(struct device_node *np, struct property *prop)  in of_add_property()
954 static inline int of_remove_property(struct device_node *np, struct property *prop)  in of_remove_property()
959 static inline bool of_console_check(const struct device_node *dn, const char *name, int index)  in of_console_check()
964 static inline const __be32 *of_prop_next_u32(struct property *prop,  in of_prop_next_u32()
970 static inline const char *of_prop_next_string(struct property *prop,  in of_prop_next_string()
995 static inline int of_property_check_flag(struct property *p, unsigned long flag)  in of_property_check_flag()
1000 static inline void of_property_set_flag(struct property *p, unsigned long flag)  in of_property_set_flag()
1004 static inline void of_property_clear_flag(struct property *p, unsigned long flag)  in of_property_clear_flag()
1010 	return -ENODEV;  in of_cpu_node_to_id()
1017 	return -EINVAL;  in of_map_id()
1036 static inline int of_prop_val_eq(struct property *p1, struct property *p2)  in of_prop_val_eq()
1038 	return p1->length == p2->length &&  in of_prop_val_eq()
1039 	       !memcmp(p1->value, p2->value, (size_t)p1->length);  in of_prop_val_eq()
1056 	return -ENOSYS;  in of_numa_init()
1072 static inline bool of_node_is_type(const struct device_node *np, const char *type)  in of_node_is_type()
1080  * of_property_count_u8_elems - Count the number of u8 elements in a property
1082  * @np:		device node from which the property value is to be read.
1083  * @propname:	name of the property to be searched.
1085  * Search for a property in a device node and count the number of u8 elements
1088  * Return: The number of elements on sucess, -EINVAL if the property does
1089  * not exist or its length does not match a multiple of u8 and -ENODATA if the
1090  * property does not have a value.
1099  * of_property_count_u16_elems - Count the number of u16 elements in a property
1101  * @np:		device node from which the property value is to be read.
1102  * @propname:	name of the property to be searched.
1104  * Search for a property in a device node and count the number of u16 elements
1107  * Return: The number of elements on sucess, -EINVAL if the property does
1108  * not exist or its length does not match a multiple of u16 and -ENODATA if the
1109  * property does not have a value.
1118  * of_property_count_u32_elems - Count the number of u32 elements in a property
1120  * @np:		device node from which the property value is to be read.
1121  * @propname:	name of the property to be searched.
1123  * Search for a property in a device node and count the number of u32 elements
1126  * Return: The number of elements on sucess, -EINVAL if the property does
1127  * not exist or its length does not match a multiple of u32 and -ENODATA if the
1128  * property does not have a value.
1137  * of_property_count_u64_elems - Count the number of u64 elements in a property
1139  * @np:		device node from which the property value is to be read.
1140  * @propname:	name of the property to be searched.
1142  * Search for a property in a device node and count the number of u64 elements
1145  * Return: The number of elements on sucess, -EINVAL if the property does
1146  * not exist or its length does not match a multiple of u64 and -ENODATA if the
1147  * property does not have a value.
1156  * of_property_read_string_array() - Read an array of strings from a multiple
1157  * strings property.
1158  * @np:		device node from which the property value is to be read.
1159  * @propname:	name of the property to be searched.
1163  * Search for a property in a device tree node and retrieve a list of
1164  * terminated string values (pointer to data, not a copy) in that property.
1166  * Return: If @out_strs is NULL, the number of strings in the property is returned.
1176  * of_property_count_strings() - Find and return the number of strings from a
1177  * multiple strings property.
1178  * @np:		device node from which the property value is to be read.
1179  * @propname:	name of the property to be searched.
1181  * Search for a property in a device tree node and retrieve the number of null
1184  * Return: The number of strings on success, -EINVAL if the property does not
1185  * exist, -ENODATA if property does not have a value, and -EILSEQ if the string
1186  * is not null-terminated within the length of the property data.
1195  * of_property_read_string_index() - Find and read a string from a multiple
1196  * strings property.
1197  * @np:		device node from which the property value is to be read.
1198  * @propname:	name of the property to be searched.
1203  * Search for a property in a device tree node and retrieve a null
1205  * contained in that property.
1207  * Return: 0 on success, -EINVAL if the property does not exist, -ENODATA if
1208  * property does not have a value, and -EILSEQ if the string is not
1209  * null-terminated within the length of the property data.
1222  * of_property_read_bool - Find a property
1223  * @np:		device node from which the property value is to be read.
1224  * @propname:	name of the property to be searched.
1226  * Search for a property in a device node.
1228  * Return: true if the property exists false otherwise.
1230 static inline bool of_property_read_bool(const struct device_node *np,  in of_property_read_bool()
1233 	struct property *prop = of_find_property(np, propname, NULL);  in of_property_read_bool()
1367  * struct of_changeset_entry	- Holds a changeset entry
1372  * @prop:	pointer to the property affected
1373  * @old_prop:	hold a pointer to the original property
1384 	struct property *prop;
1385 	struct property *old_prop;
1389  * struct of_changeset - changeset tracker structure
1394  * live tree. In case of an error, changes are rolled-back.
1421 		struct property *prop);
1436 		struct device_node *np, struct property *prop)  in of_changeset_add_property()
1442 		struct device_node *np, struct property *prop)  in of_changeset_remove_property()
1448 		struct device_node *np, struct property *prop)  in of_changeset_update_property()
1455 	return -EINVAL;  in of_reconfig_notifier_register()
1459 	return -EINVAL;  in of_reconfig_notifier_unregister()
1464 	return -EINVAL;  in of_reconfig_notify()
1469 	return -EINVAL;  in of_reconfig_get_state_change()
1474  * of_device_is_system_power_controller - Tells if system-power-controller is found for device_node
1479 static inline bool of_device_is_system_power_controller(const struct device_node *np)  in of_device_is_system_power_controller()
1481 	return of_property_read_bool(np, "system-power-controller");  in of_device_is_system_power_controller()
1515 	return -ENOTSUPP;  in of_overlay_fdt_apply()
1520 	return -ENOTSUPP;  in of_overlay_remove()
1525 	return -ENOTSUPP;  in of_overlay_remove_all()