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 struct fwnode_handle *dev_fwnode(struct device *dev);
38 bool device_property_present(struct device *dev, const char *propname);
39 int device_property_read_u8_array(struct device *dev, const char *propname,
40 u8 *val, size_t nval);
41 int device_property_read_u16_array(struct device *dev, const char *propname,
42 u16 *val, size_t nval);
43 int device_property_read_u32_array(struct device *dev, const char *propname,
44 u32 *val, size_t nval);
45 int device_property_read_u64_array(struct device *dev, const char *propname,
46 u64 *val, size_t nval);
47 int device_property_read_string_array(struct device *dev, const char *propname,
48 const char **val, size_t nval);
49 int device_property_read_string(struct device *dev, const char *propname,
51 int device_property_match_string(struct device *dev,
52 const char *propname, const char *string);
54 bool fwnode_property_present(struct fwnode_handle *fwnode, const char *propname);
55 int fwnode_property_read_u8_array(struct fwnode_handle *fwnode,
56 const char *propname, u8 *val,
58 int fwnode_property_read_u16_array(struct fwnode_handle *fwnode,
59 const char *propname, u16 *val,
61 int fwnode_property_read_u32_array(struct fwnode_handle *fwnode,
62 const char *propname, u32 *val,
64 int fwnode_property_read_u64_array(struct fwnode_handle *fwnode,
65 const char *propname, u64 *val,
67 int fwnode_property_read_string_array(struct fwnode_handle *fwnode,
68 const char *propname, const char **val,
70 int fwnode_property_read_string(struct fwnode_handle *fwnode,
71 const char *propname, const char **val);
72 int fwnode_property_match_string(struct fwnode_handle *fwnode,
73 const char *propname, const char *string);
75 struct fwnode_handle *device_get_next_child_node(struct device *dev,
76 struct fwnode_handle *child);
78 #define device_for_each_child_node(dev, child) \
79 for (child = device_get_next_child_node(dev, NULL); child; \
80 child = device_get_next_child_node(dev, child))
82 struct fwnode_handle *device_get_named_child_node(struct device *dev,
83 const char *childname);
85 void fwnode_handle_put(struct fwnode_handle *fwnode);
87 unsigned int device_get_child_node_count(struct device *dev);
89 static inline bool device_property_read_bool(struct device *dev,
92 return device_property_present(dev, propname);
95 static inline int device_property_read_u8(struct device *dev,
96 const char *propname, u8 *val)
98 return device_property_read_u8_array(dev, propname, val, 1);
101 static inline int device_property_read_u16(struct device *dev,
102 const char *propname, u16 *val)
104 return device_property_read_u16_array(dev, propname, val, 1);
107 static inline int device_property_read_u32(struct device *dev,
108 const char *propname, u32 *val)
110 return device_property_read_u32_array(dev, propname, val, 1);
113 static inline int device_property_read_u64(struct device *dev,
114 const char *propname, u64 *val)
116 return device_property_read_u64_array(dev, propname, val, 1);
119 static inline bool fwnode_property_read_bool(struct fwnode_handle *fwnode,
120 const char *propname)
122 return fwnode_property_present(fwnode, propname);
125 static inline int fwnode_property_read_u8(struct fwnode_handle *fwnode,
126 const char *propname, u8 *val)
128 return fwnode_property_read_u8_array(fwnode, propname, val, 1);
131 static inline int fwnode_property_read_u16(struct fwnode_handle *fwnode,
132 const char *propname, u16 *val)
134 return fwnode_property_read_u16_array(fwnode, propname, val, 1);
137 static inline int fwnode_property_read_u32(struct fwnode_handle *fwnode,
138 const char *propname, u32 *val)
140 return fwnode_property_read_u32_array(fwnode, propname, val, 1);
143 static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode,
144 const char *propname, u64 *val)
146 return fwnode_property_read_u64_array(fwnode, propname, val, 1);
150 * struct property_entry - "Built-in" device property representation.
151 * @name: Name of the property.
152 * @length: Length of data making up the value.
153 * @is_array: True when the property is an array.
154 * @is_string: True when property is a string.
155 * @pointer: Pointer to the property (an array of items of the given type).
156 * @value: Value of the property (when it is a single item of the given type).
158 struct property_entry {
173 unsigned long long raw_data;
184 * Note: the below four initializers for the anonymous union are carefully
185 * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
189 #define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _val_) \
190 (struct property_entry) { \
192 .length = ARRAY_SIZE(_val_) * sizeof(_type_), \
194 .is_string = false, \
195 { .pointer = { ._type_##_data = _val_ } }, \
198 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \
199 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, _val_)
200 #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \
201 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, _val_)
202 #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \
203 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, _val_)
204 #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \
205 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, _val_)
207 #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \
208 (struct property_entry) { \
210 .length = ARRAY_SIZE(_val_) * sizeof(const char *), \
213 { .pointer = { .str = _val_ } }, \
216 #define PROPERTY_ENTRY_INTEGER(_name_, _type_, _val_) \
217 (struct property_entry) { \
219 .length = sizeof(_type_), \
220 .is_string = false, \
221 { .value = { ._type_##_data = _val_ } }, \
224 #define PROPERTY_ENTRY_U8(_name_, _val_) \
225 PROPERTY_ENTRY_INTEGER(_name_, u8, _val_)
226 #define PROPERTY_ENTRY_U16(_name_, _val_) \
227 PROPERTY_ENTRY_INTEGER(_name_, u16, _val_)
228 #define PROPERTY_ENTRY_U32(_name_, _val_) \
229 PROPERTY_ENTRY_INTEGER(_name_, u32, _val_)
230 #define PROPERTY_ENTRY_U64(_name_, _val_) \
231 PROPERTY_ENTRY_INTEGER(_name_, u64, _val_)
233 #define PROPERTY_ENTRY_STRING(_name_, _val_) \
234 (struct property_entry) { \
236 .length = sizeof(const char *), \
238 { .value = { .str = _val_ } }, \
241 #define PROPERTY_ENTRY_BOOL(_name_) \
242 (struct property_entry) { \
246 int device_add_properties(struct device *dev,
247 struct property_entry *properties);
248 void device_remove_properties(struct device *dev);
250 bool device_dma_supported(struct device *dev);
252 enum dev_dma_attr device_get_dma_attr(struct device *dev);
254 int device_get_phy_mode(struct device *dev);
256 void *device_get_mac_address(struct device *dev, char *addr, int alen);
258 #endif /* _LINUX_PROPERTY_H_ */