2 * property.h - Unified device property interface.
4 * Copyright (C) 2014, Intel Corporation
5 * Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
6 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef _LINUX_PROPERTY_H_
14 #define _LINUX_PROPERTY_H_
16 #include <linux/fwnode.h>
17 #include <linux/types.h>
31 DEV_DMA_NOT_SUPPORTED,
36 bool device_property_present(struct device *dev, const char *propname);
37 int device_property_read_u8_array(struct device *dev, const char *propname,
38 u8 *val, size_t nval);
39 int device_property_read_u16_array(struct device *dev, const char *propname,
40 u16 *val, size_t nval);
41 int device_property_read_u32_array(struct device *dev, const char *propname,
42 u32 *val, size_t nval);
43 int device_property_read_u64_array(struct device *dev, const char *propname,
44 u64 *val, size_t nval);
45 int device_property_read_string_array(struct device *dev, const char *propname,
46 const char **val, size_t nval);
47 int device_property_read_string(struct device *dev, const char *propname,
49 int device_property_match_string(struct device *dev,
50 const char *propname, const char *string);
52 bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
53 int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
54 const char *propname, u8 *val,
56 int fwnode_property_read_u16_array(struct fwnode_handle *fwnode,
57 const char *propname, u16 *val,
59 int fwnode_property_read_u32_array(struct fwnode_handle *fwnode,
60 const char *propname, u32 *val,
62 int fwnode_property_read_u64_array(struct fwnode_handle *fwnode,
63 const char *propname, u64 *val,
65 int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
66 const char *propname, const char **val,
68 int fwnode_property_read_string(struct fwnode_handle *fwnode,
69 const char *propname, const char **val);
70 int fwnode_property_match_string(struct fwnode_handle *fwnode,
71 const char *propname, const char *string);
73 struct fwnode_handle *fwnode_get_parent(struct fwnode_handle *fwnode);
74 struct fwnode_handle *fwnode_get_next_child_node(struct fwnode_handle *fwnode,
75 struct fwnode_handle *child);
77 #define fwnode_for_each_child_node(fwnode, child) \
78 for (child = fwnode_get_next_child_node(fwnode, NULL); child; \
79 child = fwnode_get_next_child_node(fwnode, child))
81 struct fwnode_handle *device_get_next_child_node(struct device *dev,
82 struct fwnode_handle *child);
84 #define device_for_each_child_node(dev, child) \
85 for (child = device_get_next_child_node(dev, NULL); child; \
86 child = device_get_next_child_node(dev, child))
88 struct fwnode_handle *fwnode_get_named_child_node(struct fwnode_handle *fwnode,
89 const char *childname);
90 struct fwnode_handle *device_get_named_child_node(struct device *dev,
91 const char *childname);
93 void fwnode_handle_put(struct fwnode_handle *fwnode);
95 unsigned int device_get_child_node_count(struct device *dev);
97 static inline bool device_property_read_bool(struct device *dev,
100 return device_property_present(dev, propname);
103 static inline int device_property_read_u8(struct device *dev,
104 const char *propname, u8 *val)
106 return device_property_read_u8_array(dev, propname, val, 1);
109 static inline int device_property_read_u16(struct device *dev,
110 const char *propname, u16 *val)
112 return device_property_read_u16_array(dev, propname, val, 1);
115 static inline int device_property_read_u32(struct device *dev,
116 const char *propname, u32 *val)
118 return device_property_read_u32_array(dev, propname, val, 1);
121 static inline int device_property_read_u64(struct device *dev,
122 const char *propname, u64 *val)
124 return device_property_read_u64_array(dev, propname, val, 1);
127 static inline bool fwnode_property_read_bool(struct fwnode_handle *fwnode,
128 const char *propname)
130 return fwnode_property_present(fwnode, propname);
133 static inline int fwnode_property_read_u8(struct fwnode_handle *fwnode,
134 const char *propname, u8 *val)
136 return fwnode_property_read_u8_array(fwnode, propname, val, 1);
139 static inline int fwnode_property_read_u16(struct fwnode_handle *fwnode,
140 const char *propname, u16 *val)
142 return fwnode_property_read_u16_array(fwnode, propname, val, 1);
145 static inline int fwnode_property_read_u32(struct fwnode_handle *fwnode,
146 const char *propname, u32 *val)
148 return fwnode_property_read_u32_array(fwnode, propname, val, 1);
151 static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode,
152 const char *propname, u64 *val)
154 return fwnode_property_read_u64_array(fwnode, propname, val, 1);
158 * struct property_entry - "Built-in" device property representation.
159 * @name: Name of the property.
160 * @length: Length of data making up the value.
161 * @is_array: True when the property is an array.
162 * @is_string: True when property is a string.
163 * @pointer: Pointer to the property (an array of items of the given type).
164 * @value: Value of the property (when it is a single item of the given type).
166 struct property_entry {
173 const void *raw_data;
178 const char * const *str;
181 unsigned long long raw_data;
192 * Note: the below four initializers for the anonymous union are carefully
193 * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
197 #define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _val_) \
200 .length = ARRAY_SIZE(_val_) * sizeof(_type_), \
202 .is_string = false, \
203 { .pointer = { ._type_##_data = _val_ } }, \
206 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \
207 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, _val_)
208 #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \
209 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, _val_)
210 #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \
211 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, _val_)
212 #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \
213 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, _val_)
215 #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \
218 .length = ARRAY_SIZE(_val_) * sizeof(const char *), \
221 { .pointer = { .str = _val_ } }, \
224 #define PROPERTY_ENTRY_INTEGER(_name_, _type_, _val_) \
227 .length = sizeof(_type_), \
228 .is_string = false, \
229 { .value = { ._type_##_data = _val_ } }, \
232 #define PROPERTY_ENTRY_U8(_name_, _val_) \
233 PROPERTY_ENTRY_INTEGER(_name_, u8, _val_)
234 #define PROPERTY_ENTRY_U16(_name_, _val_) \
235 PROPERTY_ENTRY_INTEGER(_name_, u16, _val_)
236 #define PROPERTY_ENTRY_U32(_name_, _val_) \
237 PROPERTY_ENTRY_INTEGER(_name_, u32, _val_)
238 #define PROPERTY_ENTRY_U64(_name_, _val_) \
239 PROPERTY_ENTRY_INTEGER(_name_, u64, _val_)
241 #define PROPERTY_ENTRY_STRING(_name_, _val_) \
244 .length = sizeof(_val_), \
246 { .value = { .str = _val_ } }, \
249 #define PROPERTY_ENTRY_BOOL(_name_) \
254 struct property_entry *
255 property_entries_dup(const struct property_entry *properties);
257 void property_entries_free(const struct property_entry *properties);
259 int device_add_properties(struct device *dev,
260 const struct property_entry *properties);
261 void device_remove_properties(struct device *dev);
263 bool device_dma_supported(struct device *dev);
265 enum dev_dma_attr device_get_dma_attr(struct device *dev);
267 int device_get_phy_mode(struct device *dev);
269 void *device_get_mac_address(struct device *dev, char *addr, int alen);
271 struct fwnode_handle *fwnode_graph_get_next_endpoint(
272 struct fwnode_handle *fwnode, struct fwnode_handle *prev);
273 struct fwnode_handle *fwnode_graph_get_remote_port_parent(
274 struct fwnode_handle *fwnode);
275 struct fwnode_handle *fwnode_graph_get_remote_port(
276 struct fwnode_handle *fwnode);
277 struct fwnode_handle *fwnode_graph_get_remote_endpoint(
278 struct fwnode_handle *fwnode);
280 #endif /* _LINUX_PROPERTY_H_ */