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
*device_get_next_child_node(struct device
*dev
,
74 struct fwnode_handle
*child
);
76 #define device_for_each_child_node(dev, child) \
77 for (child = device_get_next_child_node(dev, NULL); child; \
78 child = device_get_next_child_node(dev, child))
80 void fwnode_handle_put(struct fwnode_handle
*fwnode
);
82 unsigned int device_get_child_node_count(struct device
*dev
);
84 static inline bool device_property_read_bool(struct device
*dev
,
87 return device_property_present(dev
, propname
);
90 static inline int device_property_read_u8(struct device
*dev
,
91 const char *propname
, u8
*val
)
93 return device_property_read_u8_array(dev
, propname
, val
, 1);
96 static inline int device_property_read_u16(struct device
*dev
,
97 const char *propname
, u16
*val
)
99 return device_property_read_u16_array(dev
, propname
, val
, 1);
102 static inline int device_property_read_u32(struct device
*dev
,
103 const char *propname
, u32
*val
)
105 return device_property_read_u32_array(dev
, propname
, val
, 1);
108 static inline int device_property_read_u64(struct device
*dev
,
109 const char *propname
, u64
*val
)
111 return device_property_read_u64_array(dev
, propname
, val
, 1);
114 static inline bool fwnode_property_read_bool(struct fwnode_handle
*fwnode
,
115 const char *propname
)
117 return fwnode_property_present(fwnode
, propname
);
120 static inline int fwnode_property_read_u8(struct fwnode_handle
*fwnode
,
121 const char *propname
, u8
*val
)
123 return fwnode_property_read_u8_array(fwnode
, propname
, val
, 1);
126 static inline int fwnode_property_read_u16(struct fwnode_handle
*fwnode
,
127 const char *propname
, u16
*val
)
129 return fwnode_property_read_u16_array(fwnode
, propname
, val
, 1);
132 static inline int fwnode_property_read_u32(struct fwnode_handle
*fwnode
,
133 const char *propname
, u32
*val
)
135 return fwnode_property_read_u32_array(fwnode
, propname
, val
, 1);
138 static inline int fwnode_property_read_u64(struct fwnode_handle
*fwnode
,
139 const char *propname
, u64
*val
)
141 return fwnode_property_read_u64_array(fwnode
, propname
, val
, 1);
145 * struct property_entry - "Built-in" device property representation.
146 * @name: Name of the property.
147 * @length: Length of data making up the value.
148 * @is_array: True when the property is an array.
149 * @is_string: True when property is a string.
150 * @pointer: Pointer to the property (an array of items of the given type).
151 * @value: Value of the property (when it is a single item of the given type).
153 struct property_entry
{
168 unsigned long long raw_data
;
179 * Note: the below four initializers for the anonymous union are carefully
180 * crafted to avoid gcc-4.4.4's problems with initialization of anon unions
184 #define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _val_) \
187 .length = ARRAY_SIZE(_val_) * sizeof(_type_), \
189 .is_string = false, \
190 { .pointer = { _type_##_data = _val_ } }, \
193 #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \
194 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, _val_)
195 #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \
196 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, _val_)
197 #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \
198 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, _val_)
199 #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \
200 PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, _val_)
202 #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \
205 .length = ARRAY_SIZE(_val_) * sizeof(const char *), \
208 { .pointer = { .str = _val_ } }, \
211 #define PROPERTY_ENTRY_INTEGER(_name_, _type_, _val_) \
214 .length = sizeof(_type_), \
215 .is_string = false, \
216 { .value = { ._type_##_data = _val_ } }, \
219 #define PROPERTY_ENTRY_U8(_name_, _val_) \
220 PROPERTY_ENTRY_INTEGER(_name_, u8, _val_)
221 #define PROPERTY_ENTRY_U16(_name_, _val_) \
222 PROPERTY_ENTRY_INTEGER(_name_, u16, _val_)
223 #define PROPERTY_ENTRY_U32(_name_, _val_) \
224 PROPERTY_ENTRY_INTEGER(_name_, u32, _val_)
225 #define PROPERTY_ENTRY_U64(_name_, _val_) \
226 PROPERTY_ENTRY_INTEGER(_name_, u64, _val_)
228 #define PROPERTY_ENTRY_STRING(_name_, _val_) \
231 .length = sizeof(_val_), \
233 { .value = { .str = _val_ } }, \
236 #define PROPERTY_ENTRY_BOOL(_name_) \
242 * struct property_set - Collection of "built-in" device properties.
243 * @fwnode: Handle to be pointed to by the fwnode field of struct device.
244 * @properties: Array of properties terminated with a null entry.
246 struct property_set
{
247 struct fwnode_handle fwnode
;
248 struct property_entry
*properties
;
251 int device_add_property_set(struct device
*dev
, const struct property_set
*pset
);
252 void device_remove_property_set(struct device
*dev
);
254 bool device_dma_supported(struct device
*dev
);
256 enum dev_dma_attr
device_get_dma_attr(struct device
*dev
);
258 int device_get_phy_mode(struct device
*dev
);
260 void *device_get_mac_address(struct device
*dev
, char *addr
, int alen
);
262 #endif /* _LINUX_PROPERTY_H_ */
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