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7d438178 | 1 | |
847ec80b JC |
2 | /* The industrial I/O core |
3 | * | |
4 | * Copyright (c) 2008 Jonathan Cameron | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published by | |
8 | * the Free Software Foundation. | |
9 | */ | |
847ec80b JC |
10 | #ifndef _INDUSTRIAL_IO_H_ |
11 | #define _INDUSTRIAL_IO_H_ | |
12 | ||
13 | #include <linux/device.h> | |
14 | #include <linux/cdev.h> | |
af5046af | 15 | #include "types.h" |
847ec80b | 16 | /* IIO TODO LIST */ |
751a3700 | 17 | /* |
847ec80b JC |
18 | * Provide means of adjusting timer accuracy. |
19 | * Currently assumes nano seconds. | |
20 | */ | |
21 | ||
1d892719 | 22 | enum iio_chan_info_enum { |
5ccb3adb JC |
23 | IIO_CHAN_INFO_RAW = 0, |
24 | IIO_CHAN_INFO_PROCESSED, | |
25 | IIO_CHAN_INFO_SCALE, | |
c8a9f805 JC |
26 | IIO_CHAN_INFO_OFFSET, |
27 | IIO_CHAN_INFO_CALIBSCALE, | |
28 | IIO_CHAN_INFO_CALIBBIAS, | |
29 | IIO_CHAN_INFO_PEAK, | |
30 | IIO_CHAN_INFO_PEAK_SCALE, | |
31 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW, | |
32 | IIO_CHAN_INFO_AVERAGE_RAW, | |
df94aba8 | 33 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY, |
ce85a1cb | 34 | IIO_CHAN_INFO_SAMP_FREQ, |
1d892719 JC |
35 | }; |
36 | ||
c8a9f805 JC |
37 | #define IIO_CHAN_INFO_SHARED_BIT(type) BIT(type*2) |
38 | #define IIO_CHAN_INFO_SEPARATE_BIT(type) BIT(type*2 + 1) | |
39 | ||
5ccb3adb JC |
40 | #define IIO_CHAN_INFO_RAW_SEPARATE_BIT \ |
41 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_RAW) | |
42 | #define IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT \ | |
43 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PROCESSED) | |
c8a9f805 JC |
44 | #define IIO_CHAN_INFO_SCALE_SEPARATE_BIT \ |
45 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_SCALE) | |
46 | #define IIO_CHAN_INFO_SCALE_SHARED_BIT \ | |
47 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_SCALE) | |
48 | #define IIO_CHAN_INFO_OFFSET_SEPARATE_BIT \ | |
49 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_OFFSET) | |
50 | #define IIO_CHAN_INFO_OFFSET_SHARED_BIT \ | |
51 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_OFFSET) | |
52 | #define IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT \ | |
53 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBSCALE) | |
54 | #define IIO_CHAN_INFO_CALIBSCALE_SHARED_BIT \ | |
55 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_CALIBSCALE) | |
56 | #define IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT \ | |
57 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBBIAS) | |
58 | #define IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT \ | |
59 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_CALIBBIAS) | |
60 | #define IIO_CHAN_INFO_PEAK_SEPARATE_BIT \ | |
61 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PEAK) | |
62 | #define IIO_CHAN_INFO_PEAK_SHARED_BIT \ | |
63 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PEAK) | |
64 | #define IIO_CHAN_INFO_PEAKSCALE_SEPARATE_BIT \ | |
65 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PEAKSCALE) | |
66 | #define IIO_CHAN_INFO_PEAKSCALE_SHARED_BIT \ | |
67 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PEAKSCALE) | |
68 | #define IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT \ | |
69 | IIO_CHAN_INFO_SEPARATE_BIT( \ | |
70 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW) | |
71 | #define IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SHARED_BIT \ | |
72 | IIO_CHAN_INFO_SHARED_BIT( \ | |
73 | IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW) | |
74 | #define IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT \ | |
75 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_AVERAGE_RAW) | |
76 | #define IIO_CHAN_INFO_AVERAGE_RAW_SHARED_BIT \ | |
77 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_AVERAGE_RAW) | |
df94aba8 JC |
78 | #define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT \ |
79 | IIO_CHAN_INFO_SHARED_BIT( \ | |
80 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | |
81 | #define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT \ | |
82 | IIO_CHAN_INFO_SEPARATE_BIT( \ | |
83 | IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | |
ce85a1cb LD |
84 | #define IIO_CHAN_INFO_SAMP_FREQ_SEPARATE_BIT \ |
85 | IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
86 | #define IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT \ | |
87 | IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_SAMP_FREQ) | |
c8a9f805 | 88 | |
8310b86c JC |
89 | enum iio_endian { |
90 | IIO_CPU, | |
91 | IIO_BE, | |
92 | IIO_LE, | |
93 | }; | |
94 | ||
5f420b42 LPC |
95 | struct iio_chan_spec; |
96 | struct iio_dev; | |
97 | ||
98 | /** | |
99 | * struct iio_chan_spec_ext_info - Extended channel info attribute | |
100 | * @name: Info attribute name | |
101 | * @shared: Whether this attribute is shared between all channels. | |
102 | * @read: Read callback for this info attribute, may be NULL. | |
103 | * @write: Write callback for this info attribute, may be NULL. | |
104 | */ | |
105 | struct iio_chan_spec_ext_info { | |
106 | const char *name; | |
107 | bool shared; | |
108 | ssize_t (*read)(struct iio_dev *, struct iio_chan_spec const *, | |
109 | char *buf); | |
110 | ssize_t (*write)(struct iio_dev *, struct iio_chan_spec const *, | |
111 | const char *buf, size_t len); | |
112 | }; | |
113 | ||
1d892719 JC |
114 | /** |
115 | * struct iio_chan_spec - specification of a single channel | |
116 | * @type: What type of measurement is the channel making. | |
4abf6f8b | 117 | * @channel: What number or name do we wish to assign the channel. |
1d892719 JC |
118 | * @channel2: If there is a second number for a differential |
119 | * channel then this is it. If modified is set then the | |
120 | * value here specifies the modifier. | |
121 | * @address: Driver specific identifier. | |
122 | * @scan_index: Monotonic index to give ordering in scans when read | |
123 | * from a buffer. | |
124 | * @scan_type: Sign: 's' or 'u' to specify signed or unsigned | |
125 | * realbits: Number of valid bits of data | |
126 | * storage_bits: Realbits + padding | |
127 | * shift: Shift right by this before masking out | |
128 | * realbits. | |
8310b86c | 129 | * endianness: little or big endian |
1d892719 JC |
130 | * @info_mask: What information is to be exported about this channel. |
131 | * This includes calibbias, scale etc. | |
132 | * @event_mask: What events can this channel produce. | |
5f420b42 LPC |
133 | * @ext_info: Array of extended info attributes for this channel. |
134 | * The array is NULL terminated, the last element should | |
135 | * have it's name field set to NULL. | |
1d892719 JC |
136 | * @extend_name: Allows labeling of channel attributes with an |
137 | * informative name. Note this has no effect codes etc, | |
138 | * unlike modifiers. | |
6c63dded | 139 | * @datasheet_name: A name used in in kernel mapping of channels. It should |
4abf6f8b | 140 | * correspond to the first name that the channel is referred |
6c63dded JC |
141 | * to by in the datasheet (e.g. IND), or the nearest |
142 | * possible compound name (e.g. IND-INC). | |
1d892719 JC |
143 | * @modified: Does a modifier apply to this channel. What these are |
144 | * depends on the channel type. Modifier is set in | |
145 | * channel2. Examples are IIO_MOD_X for axial sensors about | |
146 | * the 'x' axis. | |
147 | * @indexed: Specify the channel has a numerical index. If not, | |
148 | * the value in channel will be suppressed for attribute | |
149 | * but not for event codes. Typically set it to 0 when | |
150 | * the index is false. | |
ade7ef7b | 151 | * @differential: Channel is differential. |
1d892719 JC |
152 | */ |
153 | struct iio_chan_spec { | |
154 | enum iio_chan_type type; | |
155 | int channel; | |
156 | int channel2; | |
157 | unsigned long address; | |
158 | int scan_index; | |
159 | struct { | |
160 | char sign; | |
161 | u8 realbits; | |
162 | u8 storagebits; | |
163 | u8 shift; | |
8310b86c | 164 | enum iio_endian endianness; |
1d892719 | 165 | } scan_type; |
1c5e6a3f MH |
166 | long info_mask; |
167 | long event_mask; | |
5f420b42 | 168 | const struct iio_chan_spec_ext_info *ext_info; |
344692b1 | 169 | const char *extend_name; |
6c63dded | 170 | const char *datasheet_name; |
1d892719 JC |
171 | unsigned modified:1; |
172 | unsigned indexed:1; | |
c6fc8062 | 173 | unsigned output:1; |
ade7ef7b | 174 | unsigned differential:1; |
1d892719 | 175 | }; |
df9c1c42 | 176 | |
1d892719 JC |
177 | #define IIO_ST(si, rb, sb, sh) \ |
178 | { .sign = si, .realbits = rb, .storagebits = sb, .shift = sh } | |
179 | ||
1d892719 JC |
180 | #define IIO_CHAN_SOFT_TIMESTAMP(_si) \ |
181 | { .type = IIO_TIMESTAMP, .channel = -1, \ | |
182 | .scan_index = _si, .scan_type = IIO_ST('s', 64, 64, 0) } | |
183 | ||
847ec80b JC |
184 | /** |
185 | * iio_get_time_ns() - utility function to get a time stamp for events etc | |
186 | **/ | |
187 | static inline s64 iio_get_time_ns(void) | |
188 | { | |
189 | struct timespec ts; | |
190 | /* | |
191 | * calls getnstimeofday. | |
192 | * If hrtimers then up to ns accurate, if not microsecond. | |
193 | */ | |
194 | ktime_get_real_ts(&ts); | |
195 | ||
196 | return timespec_to_ns(&ts); | |
197 | } | |
198 | ||
847ec80b JC |
199 | /* Device operating modes */ |
200 | #define INDIO_DIRECT_MODE 0x01 | |
ec3afa40 JC |
201 | #define INDIO_BUFFER_TRIGGERED 0x02 |
202 | #define INDIO_BUFFER_HARDWARE 0x08 | |
847ec80b | 203 | |
ec3afa40 JC |
204 | #define INDIO_ALL_BUFFER_MODES \ |
205 | (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE) | |
847ec80b | 206 | |
43a4360e | 207 | struct iio_trigger; /* forward declaration */ |
7ae8cf62 | 208 | struct iio_dev; |
43a4360e | 209 | |
6fe8135f JC |
210 | /** |
211 | * struct iio_info - constant information about device | |
212 | * @driver_module: module structure used to ensure correct | |
213 | * ownership of chrdevs etc | |
6fe8135f JC |
214 | * @event_attrs: event control attributes |
215 | * @attrs: general purpose device attributes | |
216 | * @read_raw: function to request a value from the device. | |
217 | * mask specifies which value. Note 0 means a reading of | |
218 | * the channel in question. Return value will specify the | |
219 | * type of value returned by the device. val and val2 will | |
220 | * contain the elements making up the returned value. | |
221 | * @write_raw: function to write a value to the device. | |
222 | * Parameters are the same as for read_raw. | |
5c04af04 MH |
223 | * @write_raw_get_fmt: callback function to query the expected |
224 | * format/precision. If not set by the driver, write_raw | |
225 | * returns IIO_VAL_INT_PLUS_MICRO. | |
6fe8135f JC |
226 | * @read_event_config: find out if the event is enabled. |
227 | * @write_event_config: set if the event is enabled. | |
228 | * @read_event_value: read a value associated with the event. Meaning | |
229 | * is event dependant. event_code specifies which event. | |
4abf6f8b | 230 | * @write_event_value: write the value associated with the event. |
6fe8135f | 231 | * Meaning is event dependent. |
43a4360e MH |
232 | * @validate_trigger: function to validate the trigger when the |
233 | * current trigger gets changed. | |
6fe8135f JC |
234 | **/ |
235 | struct iio_info { | |
236 | struct module *driver_module; | |
6fe8135f JC |
237 | struct attribute_group *event_attrs; |
238 | const struct attribute_group *attrs; | |
239 | ||
240 | int (*read_raw)(struct iio_dev *indio_dev, | |
241 | struct iio_chan_spec const *chan, | |
242 | int *val, | |
243 | int *val2, | |
244 | long mask); | |
245 | ||
246 | int (*write_raw)(struct iio_dev *indio_dev, | |
247 | struct iio_chan_spec const *chan, | |
248 | int val, | |
249 | int val2, | |
250 | long mask); | |
251 | ||
5c04af04 MH |
252 | int (*write_raw_get_fmt)(struct iio_dev *indio_dev, |
253 | struct iio_chan_spec const *chan, | |
254 | long mask); | |
255 | ||
6fe8135f | 256 | int (*read_event_config)(struct iio_dev *indio_dev, |
330c6c57 | 257 | u64 event_code); |
6fe8135f JC |
258 | |
259 | int (*write_event_config)(struct iio_dev *indio_dev, | |
330c6c57 | 260 | u64 event_code, |
6fe8135f JC |
261 | int state); |
262 | ||
263 | int (*read_event_value)(struct iio_dev *indio_dev, | |
330c6c57 | 264 | u64 event_code, |
6fe8135f JC |
265 | int *val); |
266 | int (*write_event_value)(struct iio_dev *indio_dev, | |
330c6c57 | 267 | u64 event_code, |
6fe8135f | 268 | int val); |
43a4360e MH |
269 | int (*validate_trigger)(struct iio_dev *indio_dev, |
270 | struct iio_trigger *trig); | |
4d5f8d3d JC |
271 | int (*update_scan_mode)(struct iio_dev *indio_dev, |
272 | const unsigned long *scan_mask); | |
e553f182 MH |
273 | int (*debugfs_reg_access)(struct iio_dev *indio_dev, |
274 | unsigned reg, unsigned writeval, | |
275 | unsigned *readval); | |
6fe8135f JC |
276 | }; |
277 | ||
1612244f JC |
278 | /** |
279 | * struct iio_buffer_setup_ops - buffer setup related callbacks | |
280 | * @preenable: [DRIVER] function to run prior to marking buffer enabled | |
281 | * @postenable: [DRIVER] function to run after marking buffer enabled | |
282 | * @predisable: [DRIVER] function to run prior to marking buffer | |
283 | * disabled | |
284 | * @postdisable: [DRIVER] function to run after marking buffer disabled | |
285 | */ | |
286 | struct iio_buffer_setup_ops { | |
287 | int (*preenable)(struct iio_dev *); | |
288 | int (*postenable)(struct iio_dev *); | |
289 | int (*predisable)(struct iio_dev *); | |
290 | int (*postdisable)(struct iio_dev *); | |
291 | }; | |
292 | ||
847ec80b JC |
293 | /** |
294 | * struct iio_dev - industrial I/O device | |
295 | * @id: [INTERN] used to identify device internally | |
847ec80b JC |
296 | * @modes: [DRIVER] operating modes supported by device |
297 | * @currentmode: [DRIVER] current operating mode | |
298 | * @dev: [DRIVER] device structure, should be assigned a parent | |
299 | * and owner | |
5aa96188 | 300 | * @event_interface: [INTERN] event chrdevs associated with interrupt lines |
14555b14 | 301 | * @buffer: [DRIVER] any buffer present |
847ec80b JC |
302 | * @mlock: [INTERN] lock used to prevent simultaneous device state |
303 | * changes | |
e5c003ae | 304 | * @available_scan_masks: [DRIVER] optional array of allowed bitmasks |
32b5eeca JC |
305 | * @masklength: [INTERN] the length of the mask established from |
306 | * channels | |
959d2952 | 307 | * @active_scan_mask: [INTERN] union of all scan masks requested by buffers |
14555b14 | 308 | * @trig: [INTERN] current device trigger (buffer modes) |
25985edc | 309 | * @pollfunc: [DRIVER] function run on trigger being received |
1d892719 JC |
310 | * @channels: [DRIVER] channel specification structure table |
311 | * @num_channels: [DRIVER] number of chanels specified in @channels. | |
312 | * @channel_attr_list: [INTERN] keep track of automatically created channel | |
1a25e592 | 313 | * attributes |
26d25ae3 | 314 | * @chan_attr_group: [INTERN] group for all attrs in base directory |
1d892719 | 315 | * @name: [DRIVER] name of the device. |
1a25e592 | 316 | * @info: [DRIVER] callbacks and constant info from driver |
ac917a81 | 317 | * @info_exist_lock: [INTERN] lock to prevent use during removal |
ecbf20ca JC |
318 | * @setup_ops: [DRIVER] callbacks to call before and after buffer |
319 | * enable/disable | |
1a25e592 | 320 | * @chrdev: [INTERN] associated character device |
26d25ae3 JC |
321 | * @groups: [INTERN] attribute groups |
322 | * @groupcounter: [INTERN] index of next attribute group | |
bb01443e | 323 | * @flags: [INTERN] file ops related flags including busy flag. |
e553f182 MH |
324 | * @debugfs_dentry: [INTERN] device specific debugfs dentry. |
325 | * @cached_reg_addr: [INTERN] cached register address for debugfs reads. | |
326 | */ | |
847ec80b JC |
327 | struct iio_dev { |
328 | int id; | |
4024bc73 | 329 | |
847ec80b JC |
330 | int modes; |
331 | int currentmode; | |
332 | struct device dev; | |
847ec80b | 333 | |
5aa96188 | 334 | struct iio_event_interface *event_interface; |
847ec80b | 335 | |
14555b14 | 336 | struct iio_buffer *buffer; |
847ec80b JC |
337 | struct mutex mlock; |
338 | ||
cd4361c7 | 339 | const unsigned long *available_scan_masks; |
32b5eeca | 340 | unsigned masklength; |
cd4361c7 | 341 | const unsigned long *active_scan_mask; |
847ec80b JC |
342 | struct iio_trigger *trig; |
343 | struct iio_poll_func *pollfunc; | |
1d892719 | 344 | |
1a25e592 JC |
345 | struct iio_chan_spec const *channels; |
346 | int num_channels; | |
1d892719 | 347 | |
1a25e592 | 348 | struct list_head channel_attr_list; |
26d25ae3 | 349 | struct attribute_group chan_attr_group; |
1a25e592 JC |
350 | const char *name; |
351 | const struct iio_info *info; | |
ac917a81 | 352 | struct mutex info_exist_lock; |
1612244f | 353 | const struct iio_buffer_setup_ops *setup_ops; |
1a25e592 | 354 | struct cdev chrdev; |
26d25ae3 JC |
355 | #define IIO_MAX_GROUPS 6 |
356 | const struct attribute_group *groups[IIO_MAX_GROUPS + 1]; | |
357 | int groupcounter; | |
bb01443e LPC |
358 | |
359 | unsigned long flags; | |
e553f182 MH |
360 | #if defined(CONFIG_DEBUG_FS) |
361 | struct dentry *debugfs_dentry; | |
362 | unsigned cached_reg_addr; | |
363 | #endif | |
847ec80b JC |
364 | }; |
365 | ||
5fb21c82 JC |
366 | /** |
367 | * iio_find_channel_from_si() - get channel from its scan index | |
368 | * @indio_dev: device | |
369 | * @si: scan index to match | |
370 | */ | |
371 | const struct iio_chan_spec | |
372 | *iio_find_channel_from_si(struct iio_dev *indio_dev, int si); | |
373 | ||
847ec80b JC |
374 | /** |
375 | * iio_device_register() - register a device with the IIO subsystem | |
f8c6f4e9 | 376 | * @indio_dev: Device structure filled by the device driver |
847ec80b | 377 | **/ |
f8c6f4e9 | 378 | int iio_device_register(struct iio_dev *indio_dev); |
847ec80b JC |
379 | |
380 | /** | |
381 | * iio_device_unregister() - unregister a device from the IIO subsystem | |
f8c6f4e9 | 382 | * @indio_dev: Device structure representing the device. |
847ec80b | 383 | **/ |
f8c6f4e9 | 384 | void iio_device_unregister(struct iio_dev *indio_dev); |
847ec80b | 385 | |
847ec80b JC |
386 | /** |
387 | * iio_push_event() - try to add event to the list for userspace reading | |
f8c6f4e9 | 388 | * @indio_dev: IIO device structure |
847ec80b | 389 | * @ev_code: What event |
4c572605 | 390 | * @timestamp: When the event occurred |
847ec80b | 391 | **/ |
f8c6f4e9 | 392 | int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp); |
847ec80b | 393 | |
5aaaeba8 | 394 | extern struct bus_type iio_bus_type; |
847ec80b JC |
395 | |
396 | /** | |
4c572605 | 397 | * iio_put_device() - reference counted deallocation of struct device |
847ec80b JC |
398 | * @dev: the iio_device containing the device |
399 | **/ | |
f8c6f4e9 | 400 | static inline void iio_put_device(struct iio_dev *indio_dev) |
847ec80b | 401 | { |
f8c6f4e9 JC |
402 | if (indio_dev) |
403 | put_device(&indio_dev->dev); | |
847ec80b JC |
404 | }; |
405 | ||
6f7c8ee5 JC |
406 | /* Can we make this smaller? */ |
407 | #define IIO_ALIGN L1_CACHE_BYTES | |
847ec80b JC |
408 | /** |
409 | * iio_allocate_device() - allocate an iio_dev from a driver | |
6f7c8ee5 | 410 | * @sizeof_priv: Space to allocate for private structure. |
847ec80b | 411 | **/ |
6f7c8ee5 JC |
412 | struct iio_dev *iio_allocate_device(int sizeof_priv); |
413 | ||
f8c6f4e9 | 414 | static inline void *iio_priv(const struct iio_dev *indio_dev) |
6f7c8ee5 | 415 | { |
f8c6f4e9 | 416 | return (char *)indio_dev + ALIGN(sizeof(struct iio_dev), IIO_ALIGN); |
6f7c8ee5 JC |
417 | } |
418 | ||
419 | static inline struct iio_dev *iio_priv_to_dev(void *priv) | |
420 | { | |
421 | return (struct iio_dev *)((char *)priv - | |
422 | ALIGN(sizeof(struct iio_dev), IIO_ALIGN)); | |
423 | } | |
847ec80b JC |
424 | |
425 | /** | |
426 | * iio_free_device() - free an iio_dev from a driver | |
4c572605 | 427 | * @dev: the iio_dev associated with the device |
847ec80b | 428 | **/ |
f8c6f4e9 | 429 | void iio_free_device(struct iio_dev *indio_dev); |
847ec80b | 430 | |
847ec80b | 431 | /** |
14555b14 | 432 | * iio_buffer_enabled() - helper function to test if the buffer is enabled |
f8c6f4e9 | 433 | * @indio_dev: IIO device info structure for device |
847ec80b | 434 | **/ |
f8c6f4e9 | 435 | static inline bool iio_buffer_enabled(struct iio_dev *indio_dev) |
847ec80b | 436 | { |
f8c6f4e9 | 437 | return indio_dev->currentmode |
ec3afa40 | 438 | & (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE); |
847ec80b JC |
439 | }; |
440 | ||
e553f182 MH |
441 | /** |
442 | * iio_get_debugfs_dentry() - helper function to get the debugfs_dentry | |
443 | * @indio_dev: IIO device info structure for device | |
444 | **/ | |
445 | #if defined(CONFIG_DEBUG_FS) | |
446 | static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) | |
447 | { | |
448 | return indio_dev->debugfs_dentry; | |
449 | }; | |
450 | #else | |
451 | static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) | |
452 | { | |
453 | return NULL; | |
454 | }; | |
455 | #endif | |
456 | ||
847ec80b | 457 | #endif /* _INDUSTRIAL_IO_H_ */ |