1 /*
2 * HID Sensors Driver
3 * Copyright (c) 2012, Intel Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 */
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/module.h>
22 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <linux/hid-sensor-hub.h>
27 #include <linux/iio/iio.h>
28 #include <linux/iio/sysfs.h>
29 #include <linux/iio/buffer.h>
30 #include <linux/iio/trigger_consumer.h>
31 #include <linux/iio/triggered_buffer.h>
32 #include "../common/hid-sensors/hid-sensor-trigger.h"
33
34 enum magn_3d_channel {
35 CHANNEL_SCAN_INDEX_X,
36 CHANNEL_SCAN_INDEX_Y,
37 CHANNEL_SCAN_INDEX_Z,
38 CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP,
39 CHANNEL_SCAN_INDEX_NORTH_TRUE_TILT_COMP,
40 CHANNEL_SCAN_INDEX_NORTH_MAGN,
41 CHANNEL_SCAN_INDEX_NORTH_TRUE,
42 MAGN_3D_CHANNEL_MAX,
43 };
44
45 struct common_attributes {
46 int scale_pre_decml;
47 int scale_post_decml;
48 int scale_precision;
49 int value_offset;
50 };
51
52 struct magn_3d_state {
53 struct hid_sensor_hub_callbacks callbacks;
54 struct hid_sensor_common magn_flux_attributes;
55 struct hid_sensor_common rot_attributes;
56 struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX];
57
58 /* dynamically sized array to hold sensor values */
59 u32 *iio_vals;
60 /* array of pointers to sensor value */
61 u32 *magn_val_addr[MAGN_3D_CHANNEL_MAX];
62
63 struct common_attributes magn_flux_attr;
64 struct common_attributes rot_attr;
65 };
66
67 static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
68 HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS,
69 HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS,
70 HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS,
71 HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
72 HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH,
73 HID_USAGE_SENSOR_ORIENT_MAGN_NORTH,
74 HID_USAGE_SENSOR_ORIENT_TRUE_NORTH,
75 };
76
77 /* Channel definitions */
78 static const struct iio_chan_spec magn_3d_channels[] = {
79 {
80 .type = IIO_MAGN,
81 .modified = 1,
82 .channel2 = IIO_MOD_X,
83 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
84 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
85 BIT(IIO_CHAN_INFO_SCALE) |
86 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
87 BIT(IIO_CHAN_INFO_HYSTERESIS),
88 }, {
89 .type = IIO_MAGN,
90 .modified = 1,
91 .channel2 = IIO_MOD_Y,
92 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
93 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
94 BIT(IIO_CHAN_INFO_SCALE) |
95 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
96 BIT(IIO_CHAN_INFO_HYSTERESIS),
97 }, {
98 .type = IIO_MAGN,
99 .modified = 1,
100 .channel2 = IIO_MOD_Z,
101 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
102 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
103 BIT(IIO_CHAN_INFO_SCALE) |
104 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
105 BIT(IIO_CHAN_INFO_HYSTERESIS),
106 }, {
107 .type = IIO_ROT,
108 .modified = 1,
109 .channel2 = IIO_MOD_NORTH_MAGN_TILT_COMP,
110 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
111 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
112 BIT(IIO_CHAN_INFO_SCALE) |
113 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
114 BIT(IIO_CHAN_INFO_HYSTERESIS),
115 }, {
116 .type = IIO_ROT,
117 .modified = 1,
118 .channel2 = IIO_MOD_NORTH_TRUE_TILT_COMP,
119 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
120 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
121 BIT(IIO_CHAN_INFO_SCALE) |
122 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
123 BIT(IIO_CHAN_INFO_HYSTERESIS),
124 }, {
125 .type = IIO_ROT,
126 .modified = 1,
127 .channel2 = IIO_MOD_NORTH_MAGN,
128 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
129 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
130 BIT(IIO_CHAN_INFO_SCALE) |
131 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
132 BIT(IIO_CHAN_INFO_HYSTERESIS),
133 }, {
134 .type = IIO_ROT,
135 .modified = 1,
136 .channel2 = IIO_MOD_NORTH_TRUE,
137 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
138 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
139 BIT(IIO_CHAN_INFO_SCALE) |
140 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
141 BIT(IIO_CHAN_INFO_HYSTERESIS),
142 }
143 };
144
145 /* Adjust channel real bits based on report descriptor */
magn_3d_adjust_channel_bit_mask(struct iio_chan_spec * channels,int channel,int size)146 static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
147 int channel, int size)
148 {
149 channels[channel].scan_type.sign = 's';
150 /* Real storage bits will change based on the report desc. */
151 channels[channel].scan_type.realbits = size * 8;
152 /* Maximum size of a sample to capture is u32 */
153 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
154 }
155
156 /* Channel read_raw handler */
magn_3d_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long mask)157 static int magn_3d_read_raw(struct iio_dev *indio_dev,
158 struct iio_chan_spec const *chan,
159 int *val, int *val2,
160 long mask)
161 {
162 struct magn_3d_state *magn_state = iio_priv(indio_dev);
163 int report_id = -1;
164 u32 address;
165 int ret_type;
166 s32 min;
167
168 *val = 0;
169 *val2 = 0;
170 switch (mask) {
171 case 0:
172 hid_sensor_power_state(&magn_state->magn_flux_attributes, true);
173 report_id = magn_state->magn[chan->address].report_id;
174 min = magn_state->magn[chan->address].logical_minimum;
175 address = magn_3d_addresses[chan->address];
176 if (report_id >= 0)
177 *val = sensor_hub_input_attr_get_raw_value(
178 magn_state->magn_flux_attributes.hsdev,
179 HID_USAGE_SENSOR_COMPASS_3D, address,
180 report_id,
181 SENSOR_HUB_SYNC,
182 min < 0);
183 else {
184 *val = 0;
185 hid_sensor_power_state(
186 &magn_state->magn_flux_attributes,
187 false);
188 return -EINVAL;
189 }
190 hid_sensor_power_state(&magn_state->magn_flux_attributes,
191 false);
192 ret_type = IIO_VAL_INT;
193 break;
194 case IIO_CHAN_INFO_SCALE:
195 switch (chan->type) {
196 case IIO_MAGN:
197 *val = magn_state->magn_flux_attr.scale_pre_decml;
198 *val2 = magn_state->magn_flux_attr.scale_post_decml;
199 ret_type = magn_state->magn_flux_attr.scale_precision;
200 break;
201 case IIO_ROT:
202 *val = magn_state->rot_attr.scale_pre_decml;
203 *val2 = magn_state->rot_attr.scale_post_decml;
204 ret_type = magn_state->rot_attr.scale_precision;
205 break;
206 default:
207 ret_type = -EINVAL;
208 }
209 break;
210 case IIO_CHAN_INFO_OFFSET:
211 switch (chan->type) {
212 case IIO_MAGN:
213 *val = magn_state->magn_flux_attr.value_offset;
214 ret_type = IIO_VAL_INT;
215 break;
216 case IIO_ROT:
217 *val = magn_state->rot_attr.value_offset;
218 ret_type = IIO_VAL_INT;
219 break;
220 default:
221 ret_type = -EINVAL;
222 }
223 break;
224 case IIO_CHAN_INFO_SAMP_FREQ:
225 ret_type = hid_sensor_read_samp_freq_value(
226 &magn_state->magn_flux_attributes, val, val2);
227 break;
228 case IIO_CHAN_INFO_HYSTERESIS:
229 switch (chan->type) {
230 case IIO_MAGN:
231 ret_type = hid_sensor_read_raw_hyst_value(
232 &magn_state->magn_flux_attributes, val, val2);
233 break;
234 case IIO_ROT:
235 ret_type = hid_sensor_read_raw_hyst_value(
236 &magn_state->rot_attributes, val, val2);
237 break;
238 default:
239 ret_type = -EINVAL;
240 }
241 break;
242 default:
243 ret_type = -EINVAL;
244 break;
245 }
246
247 return ret_type;
248 }
249
250 /* Channel write_raw handler */
magn_3d_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long mask)251 static int magn_3d_write_raw(struct iio_dev *indio_dev,
252 struct iio_chan_spec const *chan,
253 int val,
254 int val2,
255 long mask)
256 {
257 struct magn_3d_state *magn_state = iio_priv(indio_dev);
258 int ret = 0;
259
260 switch (mask) {
261 case IIO_CHAN_INFO_SAMP_FREQ:
262 ret = hid_sensor_write_samp_freq_value(
263 &magn_state->magn_flux_attributes, val, val2);
264 break;
265 case IIO_CHAN_INFO_HYSTERESIS:
266 switch (chan->type) {
267 case IIO_MAGN:
268 ret = hid_sensor_write_raw_hyst_value(
269 &magn_state->magn_flux_attributes, val, val2);
270 break;
271 case IIO_ROT:
272 ret = hid_sensor_write_raw_hyst_value(
273 &magn_state->rot_attributes, val, val2);
274 break;
275 default:
276 ret = -EINVAL;
277 }
278 break;
279 default:
280 ret = -EINVAL;
281 }
282
283 return ret;
284 }
285
286 static const struct iio_info magn_3d_info = {
287 .driver_module = THIS_MODULE,
288 .read_raw = &magn_3d_read_raw,
289 .write_raw = &magn_3d_write_raw,
290 };
291
292 /* Function to push data to buffer */
hid_sensor_push_data(struct iio_dev * indio_dev,const void * data)293 static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data)
294 {
295 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
296 iio_push_to_buffers(indio_dev, data);
297 }
298
299 /* Callback handler to send event after all samples are received and captured */
magn_3d_proc_event(struct hid_sensor_hub_device * hsdev,unsigned usage_id,void * priv)300 static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
301 unsigned usage_id,
302 void *priv)
303 {
304 struct iio_dev *indio_dev = platform_get_drvdata(priv);
305 struct magn_3d_state *magn_state = iio_priv(indio_dev);
306
307 dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
308 if (atomic_read(&magn_state->magn_flux_attributes.data_ready))
309 hid_sensor_push_data(indio_dev, magn_state->iio_vals);
310
311 return 0;
312 }
313
314 /* Capture samples in local storage */
magn_3d_capture_sample(struct hid_sensor_hub_device * hsdev,unsigned usage_id,size_t raw_len,char * raw_data,void * priv)315 static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
316 unsigned usage_id,
317 size_t raw_len, char *raw_data,
318 void *priv)
319 {
320 struct iio_dev *indio_dev = platform_get_drvdata(priv);
321 struct magn_3d_state *magn_state = iio_priv(indio_dev);
322 int offset;
323 int ret = 0;
324 u32 *iio_val = NULL;
325
326 switch (usage_id) {
327 case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS:
328 case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS:
329 case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS:
330 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS)
331 + CHANNEL_SCAN_INDEX_X;
332 break;
333 case HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH:
334 case HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH:
335 case HID_USAGE_SENSOR_ORIENT_MAGN_NORTH:
336 case HID_USAGE_SENSOR_ORIENT_TRUE_NORTH:
337 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH)
338 + CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP;
339 break;
340 default:
341 return -EINVAL;
342 }
343
344 iio_val = magn_state->magn_val_addr[offset];
345
346 if (iio_val != NULL)
347 *iio_val = *((u32 *)raw_data);
348 else
349 ret = -EINVAL;
350
351 return ret;
352 }
353
354 /* Parse report which is specific to an usage id*/
magn_3d_parse_report(struct platform_device * pdev,struct hid_sensor_hub_device * hsdev,struct iio_chan_spec ** channels,int * chan_count,unsigned usage_id,struct magn_3d_state * st)355 static int magn_3d_parse_report(struct platform_device *pdev,
356 struct hid_sensor_hub_device *hsdev,
357 struct iio_chan_spec **channels,
358 int *chan_count,
359 unsigned usage_id,
360 struct magn_3d_state *st)
361 {
362 int i;
363 int attr_count = 0;
364 struct iio_chan_spec *_channels;
365
366 /* Scan for each usage attribute supported */
367 for (i = 0; i < MAGN_3D_CHANNEL_MAX; i++) {
368 int status;
369 u32 address = magn_3d_addresses[i];
370
371 /* Check if usage attribute exists in the sensor hub device */
372 status = sensor_hub_input_get_attribute_info(hsdev,
373 HID_INPUT_REPORT,
374 usage_id,
375 address,
376 &(st->magn[i]));
377 if (!status)
378 attr_count++;
379 }
380
381 if (attr_count <= 0) {
382 dev_err(&pdev->dev,
383 "failed to find any supported usage attributes in report\n");
384 return -EINVAL;
385 }
386
387 dev_dbg(&pdev->dev, "magn_3d Found %d usage attributes\n",
388 attr_count);
389 dev_dbg(&pdev->dev, "magn_3d X: %x:%x Y: %x:%x Z: %x:%x\n",
390 st->magn[0].index,
391 st->magn[0].report_id,
392 st->magn[1].index, st->magn[1].report_id,
393 st->magn[2].index, st->magn[2].report_id);
394
395 /* Setup IIO channel array */
396 _channels = devm_kcalloc(&pdev->dev, attr_count,
397 sizeof(struct iio_chan_spec),
398 GFP_KERNEL);
399 if (!_channels) {
400 dev_err(&pdev->dev,
401 "failed to allocate space for iio channels\n");
402 return -ENOMEM;
403 }
404
405 st->iio_vals = devm_kcalloc(&pdev->dev, attr_count,
406 sizeof(u32),
407 GFP_KERNEL);
408 if (!st->iio_vals) {
409 dev_err(&pdev->dev,
410 "failed to allocate space for iio values array\n");
411 return -ENOMEM;
412 }
413
414 for (i = 0, *chan_count = 0;
415 i < MAGN_3D_CHANNEL_MAX && *chan_count < attr_count;
416 i++){
417 if (st->magn[i].index >= 0) {
418 /* Setup IIO channel struct */
419 (_channels[*chan_count]) = magn_3d_channels[i];
420 (_channels[*chan_count]).scan_index = *chan_count;
421 (_channels[*chan_count]).address = i;
422
423 /* Set magn_val_addr to iio value address */
424 st->magn_val_addr[i] = &(st->iio_vals[*chan_count]);
425 magn_3d_adjust_channel_bit_mask(_channels,
426 *chan_count,
427 st->magn[i].size);
428 (*chan_count)++;
429 }
430 }
431
432 if (*chan_count <= 0) {
433 dev_err(&pdev->dev,
434 "failed to find any magnetic channels setup\n");
435 return -EINVAL;
436 }
437
438 *channels = _channels;
439
440 dev_dbg(&pdev->dev, "magn_3d Setup %d IIO channels\n",
441 *chan_count);
442
443 st->magn_flux_attr.scale_precision = hid_sensor_format_scale(
444 HID_USAGE_SENSOR_COMPASS_3D,
445 &st->magn[CHANNEL_SCAN_INDEX_X],
446 &st->magn_flux_attr.scale_pre_decml,
447 &st->magn_flux_attr.scale_post_decml);
448 st->rot_attr.scale_precision
449 = hid_sensor_format_scale(
450 HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
451 &st->magn[CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP],
452 &st->rot_attr.scale_pre_decml,
453 &st->rot_attr.scale_post_decml);
454
455 /* Set Sensitivity field ids, when there is no individual modifier */
456 if (st->magn_flux_attributes.sensitivity.index < 0) {
457 sensor_hub_input_get_attribute_info(hsdev,
458 HID_FEATURE_REPORT, usage_id,
459 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
460 HID_USAGE_SENSOR_DATA_ORIENTATION,
461 &st->magn_flux_attributes.sensitivity);
462 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
463 st->magn_flux_attributes.sensitivity.index,
464 st->magn_flux_attributes.sensitivity.report_id);
465 }
466 if (st->magn_flux_attributes.sensitivity.index < 0) {
467 sensor_hub_input_get_attribute_info(hsdev,
468 HID_FEATURE_REPORT, usage_id,
469 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
470 HID_USAGE_SENSOR_ORIENT_MAGN_FLUX,
471 &st->magn_flux_attributes.sensitivity);
472 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
473 st->magn_flux_attributes.sensitivity.index,
474 st->magn_flux_attributes.sensitivity.report_id);
475 }
476 if (st->rot_attributes.sensitivity.index < 0) {
477 sensor_hub_input_get_attribute_info(hsdev,
478 HID_FEATURE_REPORT, usage_id,
479 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
480 HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
481 &st->rot_attributes.sensitivity);
482 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
483 st->rot_attributes.sensitivity.index,
484 st->rot_attributes.sensitivity.report_id);
485 }
486
487 return 0;
488 }
489
490 /* Function to initialize the processing for usage id */
hid_magn_3d_probe(struct platform_device * pdev)491 static int hid_magn_3d_probe(struct platform_device *pdev)
492 {
493 int ret = 0;
494 static char *name = "magn_3d";
495 struct iio_dev *indio_dev;
496 struct magn_3d_state *magn_state;
497 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
498 struct iio_chan_spec *channels;
499 int chan_count = 0;
500
501 indio_dev = devm_iio_device_alloc(&pdev->dev,
502 sizeof(struct magn_3d_state));
503 if (indio_dev == NULL)
504 return -ENOMEM;
505
506 platform_set_drvdata(pdev, indio_dev);
507
508 magn_state = iio_priv(indio_dev);
509 magn_state->magn_flux_attributes.hsdev = hsdev;
510 magn_state->magn_flux_attributes.pdev = pdev;
511
512 ret = hid_sensor_parse_common_attributes(hsdev,
513 HID_USAGE_SENSOR_COMPASS_3D,
514 &magn_state->magn_flux_attributes);
515 if (ret) {
516 dev_err(&pdev->dev, "failed to setup common attributes\n");
517 return ret;
518 }
519 magn_state->rot_attributes = magn_state->magn_flux_attributes;
520
521 ret = magn_3d_parse_report(pdev, hsdev,
522 &channels, &chan_count,
523 HID_USAGE_SENSOR_COMPASS_3D, magn_state);
524 if (ret) {
525 dev_err(&pdev->dev, "failed to parse report\n");
526 return ret;
527 }
528
529 indio_dev->channels = channels;
530 indio_dev->num_channels = chan_count;
531 indio_dev->dev.parent = &pdev->dev;
532 indio_dev->info = &magn_3d_info;
533 indio_dev->name = name;
534 indio_dev->modes = INDIO_DIRECT_MODE;
535
536 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
537 NULL, NULL);
538 if (ret) {
539 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
540 return ret;
541 }
542 atomic_set(&magn_state->magn_flux_attributes.data_ready, 0);
543 ret = hid_sensor_setup_trigger(indio_dev, name,
544 &magn_state->magn_flux_attributes);
545 if (ret < 0) {
546 dev_err(&pdev->dev, "trigger setup failed\n");
547 goto error_unreg_buffer_funcs;
548 }
549
550 ret = iio_device_register(indio_dev);
551 if (ret) {
552 dev_err(&pdev->dev, "device register failed\n");
553 goto error_remove_trigger;
554 }
555
556 magn_state->callbacks.send_event = magn_3d_proc_event;
557 magn_state->callbacks.capture_sample = magn_3d_capture_sample;
558 magn_state->callbacks.pdev = pdev;
559 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D,
560 &magn_state->callbacks);
561 if (ret < 0) {
562 dev_err(&pdev->dev, "callback reg failed\n");
563 goto error_iio_unreg;
564 }
565
566 return ret;
567
568 error_iio_unreg:
569 iio_device_unregister(indio_dev);
570 error_remove_trigger:
571 hid_sensor_remove_trigger(&magn_state->magn_flux_attributes);
572 error_unreg_buffer_funcs:
573 iio_triggered_buffer_cleanup(indio_dev);
574 return ret;
575 }
576
577 /* Function to deinitialize the processing for usage id */
hid_magn_3d_remove(struct platform_device * pdev)578 static int hid_magn_3d_remove(struct platform_device *pdev)
579 {
580 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
581 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
582 struct magn_3d_state *magn_state = iio_priv(indio_dev);
583
584 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
585 iio_device_unregister(indio_dev);
586 hid_sensor_remove_trigger(&magn_state->magn_flux_attributes);
587 iio_triggered_buffer_cleanup(indio_dev);
588
589 return 0;
590 }
591
592 static const struct platform_device_id hid_magn_3d_ids[] = {
593 {
594 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
595 .name = "HID-SENSOR-200083",
596 },
597 { /* sentinel */ }
598 };
599 MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids);
600
601 static struct platform_driver hid_magn_3d_platform_driver = {
602 .id_table = hid_magn_3d_ids,
603 .driver = {
604 .name = KBUILD_MODNAME,
605 .pm = &hid_sensor_pm_ops,
606 },
607 .probe = hid_magn_3d_probe,
608 .remove = hid_magn_3d_remove,
609 };
610 module_platform_driver(hid_magn_3d_platform_driver);
611
612 MODULE_DESCRIPTION("HID Sensor Magnetometer 3D");
613 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
614 MODULE_LICENSE("GPL");
615