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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
b31384fa RW |
2 | /* |
3 | * property.h - Unified device property interface. | |
4 | * | |
5 | * Copyright (C) 2014, Intel Corporation | |
6 | * Authors: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
7 | * Mika Westerberg <mika.westerberg@linux.intel.com> | |
b31384fa RW |
8 | */ |
9 | ||
10 | #ifndef _LINUX_PROPERTY_H_ | |
11 | #define _LINUX_PROPERTY_H_ | |
12 | ||
0fcc2bdc | 13 | #include <linux/bits.h> |
ce793486 | 14 | #include <linux/fwnode.h> |
b31384fa RW |
15 | #include <linux/types.h> |
16 | ||
17 | struct device; | |
18 | ||
19 | enum dev_prop_type { | |
20 | DEV_PROP_U8, | |
21 | DEV_PROP_U16, | |
22 | DEV_PROP_U32, | |
23 | DEV_PROP_U64, | |
24 | DEV_PROP_STRING, | |
25 | DEV_PROP_MAX, | |
26 | }; | |
27 | ||
1b9863c6 SS |
28 | enum dev_dma_attr { |
29 | DEV_DMA_NOT_SUPPORTED, | |
30 | DEV_DMA_NON_COHERENT, | |
31 | DEV_DMA_COHERENT, | |
32 | }; | |
33 | ||
e44bb0cb SA |
34 | struct fwnode_handle *dev_fwnode(struct device *dev); |
35 | ||
b31384fa RW |
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, | |
48 | const char **val); | |
3f5c8d31 MW |
49 | int device_property_match_string(struct device *dev, |
50 | const char *propname, const char *string); | |
b31384fa | 51 | |
37ba983c SA |
52 | bool fwnode_device_is_available(const struct fwnode_handle *fwnode); |
53 | bool fwnode_property_present(const struct fwnode_handle *fwnode, | |
54 | const char *propname); | |
55 | int fwnode_property_read_u8_array(const struct fwnode_handle *fwnode, | |
8a0662d9 RW |
56 | const char *propname, u8 *val, |
57 | size_t nval); | |
37ba983c | 58 | int fwnode_property_read_u16_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
59 | const char *propname, u16 *val, |
60 | size_t nval); | |
37ba983c | 61 | int fwnode_property_read_u32_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
62 | const char *propname, u32 *val, |
63 | size_t nval); | |
37ba983c | 64 | int fwnode_property_read_u64_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
65 | const char *propname, u64 *val, |
66 | size_t nval); | |
37ba983c | 67 | int fwnode_property_read_string_array(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
68 | const char *propname, const char **val, |
69 | size_t nval); | |
37ba983c | 70 | int fwnode_property_read_string(const struct fwnode_handle *fwnode, |
8a0662d9 | 71 | const char *propname, const char **val); |
37ba983c | 72 | int fwnode_property_match_string(const struct fwnode_handle *fwnode, |
3f5c8d31 | 73 | const char *propname, const char *string); |
3e3119d3 SA |
74 | int fwnode_property_get_reference_args(const struct fwnode_handle *fwnode, |
75 | const char *prop, const char *nargs_prop, | |
76 | unsigned int nargs, unsigned int index, | |
77 | struct fwnode_reference_args *args); | |
8a0662d9 | 78 | |
37ba983c SA |
79 | struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); |
80 | struct fwnode_handle *fwnode_get_next_parent( | |
81 | struct fwnode_handle *fwnode); | |
82 | struct fwnode_handle *fwnode_get_next_child_node( | |
83 | const struct fwnode_handle *fwnode, struct fwnode_handle *child); | |
3395de96 MW |
84 | struct fwnode_handle *fwnode_get_next_available_child_node( |
85 | const struct fwnode_handle *fwnode, struct fwnode_handle *child); | |
34055190 MW |
86 | |
87 | #define fwnode_for_each_child_node(fwnode, child) \ | |
88 | for (child = fwnode_get_next_child_node(fwnode, NULL); child; \ | |
89 | child = fwnode_get_next_child_node(fwnode, child)) | |
afaf26fd | 90 | |
3395de96 MW |
91 | #define fwnode_for_each_available_child_node(fwnode, child) \ |
92 | for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\ | |
93 | child = fwnode_get_next_available_child_node(fwnode, child)) | |
94 | ||
37ba983c SA |
95 | struct fwnode_handle *device_get_next_child_node( |
96 | struct device *dev, struct fwnode_handle *child); | |
8a0662d9 | 97 | |
1d656fb7 AS |
98 | #define device_for_each_child_node(dev, child) \ |
99 | for (child = device_get_next_child_node(dev, NULL); child; \ | |
8a0662d9 RW |
100 | child = device_get_next_child_node(dev, child)) |
101 | ||
37ba983c SA |
102 | struct fwnode_handle *fwnode_get_named_child_node( |
103 | const struct fwnode_handle *fwnode, const char *childname); | |
613e9721 AT |
104 | struct fwnode_handle *device_get_named_child_node(struct device *dev, |
105 | const char *childname); | |
106 | ||
cf89a31c | 107 | struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); |
8a0662d9 RW |
108 | void fwnode_handle_put(struct fwnode_handle *fwnode); |
109 | ||
7c6c57f2 MW |
110 | int fwnode_irq_get(struct fwnode_handle *fwnode, unsigned int index); |
111 | ||
8a0662d9 RW |
112 | unsigned int device_get_child_node_count(struct device *dev); |
113 | ||
b31384fa RW |
114 | static inline bool device_property_read_bool(struct device *dev, |
115 | const char *propname) | |
116 | { | |
117 | return device_property_present(dev, propname); | |
118 | } | |
119 | ||
120 | static inline int device_property_read_u8(struct device *dev, | |
121 | const char *propname, u8 *val) | |
122 | { | |
123 | return device_property_read_u8_array(dev, propname, val, 1); | |
124 | } | |
125 | ||
126 | static inline int device_property_read_u16(struct device *dev, | |
127 | const char *propname, u16 *val) | |
128 | { | |
129 | return device_property_read_u16_array(dev, propname, val, 1); | |
130 | } | |
131 | ||
132 | static inline int device_property_read_u32(struct device *dev, | |
133 | const char *propname, u32 *val) | |
134 | { | |
135 | return device_property_read_u32_array(dev, propname, val, 1); | |
136 | } | |
137 | ||
138 | static inline int device_property_read_u64(struct device *dev, | |
139 | const char *propname, u64 *val) | |
140 | { | |
141 | return device_property_read_u64_array(dev, propname, val, 1); | |
142 | } | |
143 | ||
37ba983c | 144 | static inline bool fwnode_property_read_bool(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
145 | const char *propname) |
146 | { | |
147 | return fwnode_property_present(fwnode, propname); | |
148 | } | |
149 | ||
37ba983c | 150 | static inline int fwnode_property_read_u8(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
151 | const char *propname, u8 *val) |
152 | { | |
153 | return fwnode_property_read_u8_array(fwnode, propname, val, 1); | |
154 | } | |
155 | ||
37ba983c | 156 | static inline int fwnode_property_read_u16(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
157 | const char *propname, u16 *val) |
158 | { | |
159 | return fwnode_property_read_u16_array(fwnode, propname, val, 1); | |
160 | } | |
161 | ||
37ba983c | 162 | static inline int fwnode_property_read_u32(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
163 | const char *propname, u32 *val) |
164 | { | |
165 | return fwnode_property_read_u32_array(fwnode, propname, val, 1); | |
166 | } | |
167 | ||
37ba983c | 168 | static inline int fwnode_property_read_u64(const struct fwnode_handle *fwnode, |
8a0662d9 RW |
169 | const char *propname, u64 *val) |
170 | { | |
171 | return fwnode_property_read_u64_array(fwnode, propname, val, 1); | |
172 | } | |
173 | ||
16ba08d5 RW |
174 | /** |
175 | * struct property_entry - "Built-in" device property representation. | |
176 | * @name: Name of the property. | |
318a1971 | 177 | * @length: Length of data making up the value. |
66586bab | 178 | * @is_array: True when the property is an array. |
63dcc709 | 179 | * @type: Type of the data in unions. |
66586bab AS |
180 | * @pointer: Pointer to the property (an array of items of the given type). |
181 | * @value: Value of the property (when it is a single item of the given type). | |
16ba08d5 RW |
182 | */ |
183 | struct property_entry { | |
184 | const char *name; | |
318a1971 | 185 | size_t length; |
66586bab | 186 | bool is_array; |
63dcc709 | 187 | enum dev_prop_type type; |
16ba08d5 | 188 | union { |
66586bab | 189 | union { |
9426998c DT |
190 | const u8 *u8_data; |
191 | const u16 *u16_data; | |
192 | const u32 *u32_data; | |
193 | const u64 *u64_data; | |
194 | const char * const *str; | |
66586bab AS |
195 | } pointer; |
196 | union { | |
66586bab AS |
197 | u8 u8_data; |
198 | u16 u16_data; | |
199 | u32 u32_data; | |
200 | u64 u64_data; | |
201 | const char *str; | |
202 | } value; | |
203 | }; | |
16ba08d5 RW |
204 | }; |
205 | ||
d76eebfa AM |
206 | /* |
207 | * Note: the below four initializers for the anonymous union are carefully | |
208 | * crafted to avoid gcc-4.4.4's problems with initialization of anon unions | |
209 | * and structs. | |
210 | */ | |
211 | ||
63dcc709 AS |
212 | #define PROPERTY_ENTRY_INTEGER_ARRAY(_name_, _type_, _Type_, _val_) \ |
213 | (struct property_entry) { \ | |
214 | .name = _name_, \ | |
215 | .length = ARRAY_SIZE(_val_) * sizeof(_type_), \ | |
216 | .is_array = true, \ | |
217 | .type = DEV_PROP_##_Type_, \ | |
218 | { .pointer = { ._type_##_data = _val_ } }, \ | |
a85f4204 HK |
219 | } |
220 | ||
221 | #define PROPERTY_ENTRY_U8_ARRAY(_name_, _val_) \ | |
63dcc709 | 222 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u8, U8, _val_) |
a85f4204 | 223 | #define PROPERTY_ENTRY_U16_ARRAY(_name_, _val_) \ |
63dcc709 | 224 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u16, U16, _val_) |
a85f4204 | 225 | #define PROPERTY_ENTRY_U32_ARRAY(_name_, _val_) \ |
63dcc709 | 226 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u32, U32, _val_) |
a85f4204 | 227 | #define PROPERTY_ENTRY_U64_ARRAY(_name_, _val_) \ |
63dcc709 | 228 | PROPERTY_ENTRY_INTEGER_ARRAY(_name_, u64, U64, _val_) |
a85f4204 HK |
229 | |
230 | #define PROPERTY_ENTRY_STRING_ARRAY(_name_, _val_) \ | |
c505cbd4 | 231 | (struct property_entry) { \ |
a85f4204 HK |
232 | .name = _name_, \ |
233 | .length = ARRAY_SIZE(_val_) * sizeof(const char *), \ | |
234 | .is_array = true, \ | |
63dcc709 | 235 | .type = DEV_PROP_STRING, \ |
d76eebfa | 236 | { .pointer = { .str = _val_ } }, \ |
a85f4204 HK |
237 | } |
238 | ||
63dcc709 AS |
239 | #define PROPERTY_ENTRY_INTEGER(_name_, _type_, _Type_, _val_) \ |
240 | (struct property_entry) { \ | |
241 | .name = _name_, \ | |
242 | .length = sizeof(_type_), \ | |
243 | .type = DEV_PROP_##_Type_, \ | |
244 | { .value = { ._type_##_data = _val_ } }, \ | |
a85f4204 HK |
245 | } |
246 | ||
247 | #define PROPERTY_ENTRY_U8(_name_, _val_) \ | |
63dcc709 | 248 | PROPERTY_ENTRY_INTEGER(_name_, u8, U8, _val_) |
a85f4204 | 249 | #define PROPERTY_ENTRY_U16(_name_, _val_) \ |
63dcc709 | 250 | PROPERTY_ENTRY_INTEGER(_name_, u16, U16, _val_) |
a85f4204 | 251 | #define PROPERTY_ENTRY_U32(_name_, _val_) \ |
63dcc709 | 252 | PROPERTY_ENTRY_INTEGER(_name_, u32, U32, _val_) |
a85f4204 | 253 | #define PROPERTY_ENTRY_U64(_name_, _val_) \ |
63dcc709 | 254 | PROPERTY_ENTRY_INTEGER(_name_, u64, U64, _val_) |
a85f4204 HK |
255 | |
256 | #define PROPERTY_ENTRY_STRING(_name_, _val_) \ | |
c505cbd4 | 257 | (struct property_entry) { \ |
a85f4204 | 258 | .name = _name_, \ |
2b6e4924 | 259 | .length = sizeof(const char *), \ |
63dcc709 | 260 | .type = DEV_PROP_STRING, \ |
aace7367 | 261 | { .value = { .str = _val_ } }, \ |
a85f4204 HK |
262 | } |
263 | ||
264 | #define PROPERTY_ENTRY_BOOL(_name_) \ | |
c505cbd4 | 265 | (struct property_entry) { \ |
a85f4204 HK |
266 | .name = _name_, \ |
267 | } | |
268 | ||
2d479e1f DT |
269 | struct property_entry * |
270 | property_entries_dup(const struct property_entry *properties); | |
271 | ||
272 | void property_entries_free(const struct property_entry *properties); | |
273 | ||
f4d05266 | 274 | int device_add_properties(struct device *dev, |
bec84da8 | 275 | const struct property_entry *properties); |
f4d05266 | 276 | void device_remove_properties(struct device *dev); |
16ba08d5 | 277 | |
e5e55864 SS |
278 | bool device_dma_supported(struct device *dev); |
279 | ||
280 | enum dev_dma_attr device_get_dma_attr(struct device *dev); | |
b283f157 | 281 | |
67dcc26d | 282 | const void *device_get_match_data(struct device *dev); |
e5e55864 | 283 | |
4c96b7dc JL |
284 | int device_get_phy_mode(struct device *dev); |
285 | ||
286 | void *device_get_mac_address(struct device *dev, char *addr, int alen); | |
287 | ||
b28f263b | 288 | int fwnode_get_phy_mode(struct fwnode_handle *fwnode); |
babe2dbb MW |
289 | void *fwnode_get_mac_address(struct fwnode_handle *fwnode, |
290 | char *addr, int alen); | |
07bb80d4 | 291 | struct fwnode_handle *fwnode_graph_get_next_endpoint( |
37ba983c | 292 | const struct fwnode_handle *fwnode, struct fwnode_handle *prev); |
6a71d8d7 | 293 | struct fwnode_handle * |
37ba983c | 294 | fwnode_graph_get_port_parent(const struct fwnode_handle *fwnode); |
07bb80d4 | 295 | struct fwnode_handle *fwnode_graph_get_remote_port_parent( |
37ba983c | 296 | const struct fwnode_handle *fwnode); |
07bb80d4 | 297 | struct fwnode_handle *fwnode_graph_get_remote_port( |
37ba983c | 298 | const struct fwnode_handle *fwnode); |
07bb80d4 | 299 | struct fwnode_handle *fwnode_graph_get_remote_endpoint( |
37ba983c SA |
300 | const struct fwnode_handle *fwnode); |
301 | struct fwnode_handle * | |
302 | fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port, | |
303 | u32 endpoint); | |
07bb80d4 | 304 | |
0fcc2bdc SA |
305 | /* |
306 | * Fwnode lookup flags | |
307 | * | |
308 | * @FWNODE_GRAPH_ENDPOINT_NEXT: In the case of no exact match, look for the | |
309 | * closest endpoint ID greater than the specified | |
310 | * one. | |
311 | * @FWNODE_GRAPH_DEVICE_DISABLED: That the device to which the remote | |
312 | * endpoint of the given endpoint belongs to, | |
313 | * may be disabled. | |
314 | */ | |
315 | #define FWNODE_GRAPH_ENDPOINT_NEXT BIT(0) | |
316 | #define FWNODE_GRAPH_DEVICE_DISABLED BIT(1) | |
317 | ||
318 | struct fwnode_handle * | |
319 | fwnode_graph_get_endpoint_by_id(const struct fwnode_handle *fwnode, | |
320 | u32 port, u32 endpoint, unsigned long flags); | |
321 | ||
5e4b1b70 SA |
322 | #define fwnode_graph_for_each_endpoint(fwnode, child) \ |
323 | for (child = NULL; \ | |
324 | (child = fwnode_graph_get_next_endpoint(fwnode, child)); ) | |
325 | ||
37ba983c | 326 | int fwnode_graph_parse_endpoint(const struct fwnode_handle *fwnode, |
2bd5452d SA |
327 | struct fwnode_endpoint *endpoint); |
328 | ||
59abd836 HK |
329 | /* -------------------------------------------------------------------------- */ |
330 | /* Software fwnode support - when HW description is incomplete or missing */ | |
331 | ||
332 | bool is_software_node(const struct fwnode_handle *fwnode); | |
333 | ||
334 | int software_node_notify(struct device *dev, unsigned long action); | |
335 | ||
336 | struct fwnode_handle * | |
337 | fwnode_create_software_node(const struct property_entry *properties, | |
338 | const struct fwnode_handle *parent); | |
339 | void fwnode_remove_software_node(struct fwnode_handle *fwnode); | |
340 | ||
b31384fa | 341 | #endif /* _LINUX_PROPERTY_H_ */ |