Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/iio/magnetometer/hid-sensor-magn-3d.c

  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 */
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 */
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 
167         *val = 0;
168         *val2 = 0;
169         switch (mask) {
170         case 0:
171                 hid_sensor_power_state(&magn_state->magn_flux_attributes, true);
172                 report_id =
173                         magn_state->magn[chan->address].report_id;
174                 address = magn_3d_addresses[chan->address];
175                 if (report_id >= 0)
176                         *val = sensor_hub_input_attr_get_raw_value(
177                                 magn_state->magn_flux_attributes.hsdev,
178                                 HID_USAGE_SENSOR_COMPASS_3D, address,
179                                 report_id,
180                                 SENSOR_HUB_SYNC);
181                 else {
182                         *val = 0;
183                         hid_sensor_power_state(
184                                 &magn_state->magn_flux_attributes,
185                                 false);
186                         return -EINVAL;
187                 }
188                 hid_sensor_power_state(&magn_state->magn_flux_attributes,
189                                         false);
190                 ret_type = IIO_VAL_INT;
191                 break;
192         case IIO_CHAN_INFO_SCALE:
193                 switch (chan->type) {
194                 case IIO_MAGN:
195                         *val = magn_state->magn_flux_attr.scale_pre_decml;
196                         *val2 = magn_state->magn_flux_attr.scale_post_decml;
197                         ret_type = magn_state->magn_flux_attr.scale_precision;
198                         break;
199                 case IIO_ROT:
200                         *val = magn_state->rot_attr.scale_pre_decml;
201                         *val2 = magn_state->rot_attr.scale_post_decml;
202                         ret_type = magn_state->rot_attr.scale_precision;
203                         break;
204                 default:
205                         ret_type = -EINVAL;
206                 }
207                 break;
208         case IIO_CHAN_INFO_OFFSET:
209                 switch (chan->type) {
210                 case IIO_MAGN:
211                         *val = magn_state->magn_flux_attr.value_offset;
212                         ret_type = IIO_VAL_INT;
213                         break;
214                 case IIO_ROT:
215                         *val = magn_state->rot_attr.value_offset;
216                         ret_type = IIO_VAL_INT;
217                         break;
218                 default:
219                         ret_type = -EINVAL;
220                 }
221                 break;
222         case IIO_CHAN_INFO_SAMP_FREQ:
223                 ret_type = hid_sensor_read_samp_freq_value(
224                         &magn_state->magn_flux_attributes, val, val2);
225                 break;
226         case IIO_CHAN_INFO_HYSTERESIS:
227                 switch (chan->type) {
228                 case IIO_MAGN:
229                         ret_type = hid_sensor_read_raw_hyst_value(
230                                 &magn_state->magn_flux_attributes, val, val2);
231                         break;
232                 case IIO_ROT:
233                         ret_type = hid_sensor_read_raw_hyst_value(
234                                 &magn_state->rot_attributes, val, val2);
235                         break;
236                 default:
237                         ret_type = -EINVAL;
238                 }
239                 break;
240         default:
241                 ret_type = -EINVAL;
242                 break;
243         }
244 
245         return ret_type;
246 }
247 
248 /* Channel write_raw handler */
249 static int magn_3d_write_raw(struct iio_dev *indio_dev,
250                                struct iio_chan_spec const *chan,
251                                int val,
252                                int val2,
253                                long mask)
254 {
255         struct magn_3d_state *magn_state = iio_priv(indio_dev);
256         int ret = 0;
257 
258         switch (mask) {
259         case IIO_CHAN_INFO_SAMP_FREQ:
260                 ret = hid_sensor_write_samp_freq_value(
261                                 &magn_state->magn_flux_attributes, val, val2);
262                 break;
263         case IIO_CHAN_INFO_HYSTERESIS:
264                 switch (chan->type) {
265                 case IIO_MAGN:
266                         ret = hid_sensor_write_raw_hyst_value(
267                                 &magn_state->magn_flux_attributes, val, val2);
268                         break;
269                 case IIO_ROT:
270                         ret = hid_sensor_write_raw_hyst_value(
271                                 &magn_state->rot_attributes, val, val2);
272                         break;
273                 default:
274                         ret = -EINVAL;
275                 }
276                 break;
277         default:
278                 ret = -EINVAL;
279         }
280 
281         return ret;
282 }
283 
284 static const struct iio_info magn_3d_info = {
285         .driver_module = THIS_MODULE,
286         .read_raw = &magn_3d_read_raw,
287         .write_raw = &magn_3d_write_raw,
288 };
289 
290 /* Function to push data to buffer */
291 static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data)
292 {
293         dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
294         iio_push_to_buffers(indio_dev, data);
295 }
296 
297 /* Callback handler to send event after all samples are received and captured */
298 static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
299                                 unsigned usage_id,
300                                 void *priv)
301 {
302         struct iio_dev *indio_dev = platform_get_drvdata(priv);
303         struct magn_3d_state *magn_state = iio_priv(indio_dev);
304 
305         dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
306         if (atomic_read(&magn_state->magn_flux_attributes.data_ready))
307                 hid_sensor_push_data(indio_dev, magn_state->iio_vals);
308 
309         return 0;
310 }
311 
312 /* Capture samples in local storage */
313 static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
314                                 unsigned usage_id,
315                                 size_t raw_len, char *raw_data,
316                                 void *priv)
317 {
318         struct iio_dev *indio_dev = platform_get_drvdata(priv);
319         struct magn_3d_state *magn_state = iio_priv(indio_dev);
320         int offset;
321         int ret = 0;
322         u32 *iio_val = NULL;
323 
324         switch (usage_id) {
325         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS:
326         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS:
327         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS:
328                 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS)
329                                 + CHANNEL_SCAN_INDEX_X;
330         break;
331         case HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH:
332         case HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH:
333         case HID_USAGE_SENSOR_ORIENT_MAGN_NORTH:
334         case HID_USAGE_SENSOR_ORIENT_TRUE_NORTH:
335                 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH)
336                                 + CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP;
337         break;
338         default:
339                 return -EINVAL;
340         }
341 
342         iio_val = magn_state->magn_val_addr[offset];
343 
344         if (iio_val != NULL)
345                 *iio_val = *((u32 *)raw_data);
346         else
347                 ret = -EINVAL;
348 
349         return ret;
350 }
351 
352 /* Parse report which is specific to an usage id*/
353 static int magn_3d_parse_report(struct platform_device *pdev,
354                                 struct hid_sensor_hub_device *hsdev,
355                                 struct iio_chan_spec **channels,
356                                 int *chan_count,
357                                 unsigned usage_id,
358                                 struct magn_3d_state *st)
359 {
360         int i;
361         int attr_count = 0;
362         struct iio_chan_spec *_channels;
363 
364         /* Scan for each usage attribute supported */
365         for (i = 0; i < MAGN_3D_CHANNEL_MAX; i++) {
366                 int status;
367                 u32 address = magn_3d_addresses[i];
368 
369                 /* Check if usage attribute exists in the sensor hub device */
370                 status = sensor_hub_input_get_attribute_info(hsdev,
371                         HID_INPUT_REPORT,
372                         usage_id,
373                         address,
374                         &(st->magn[i]));
375                 if (!status)
376                         attr_count++;
377         }
378 
379         if (attr_count <= 0) {
380                 dev_err(&pdev->dev,
381                         "failed to find any supported usage attributes in report\n");
382                 return  -EINVAL;
383         }
384 
385         dev_dbg(&pdev->dev, "magn_3d Found %d usage attributes\n",
386                         attr_count);
387         dev_dbg(&pdev->dev, "magn_3d X: %x:%x Y: %x:%x Z: %x:%x\n",
388                         st->magn[0].index,
389                         st->magn[0].report_id,
390                         st->magn[1].index, st->magn[1].report_id,
391                         st->magn[2].index, st->magn[2].report_id);
392 
393         /* Setup IIO channel array */
394         _channels = devm_kcalloc(&pdev->dev, attr_count,
395                                 sizeof(struct iio_chan_spec),
396                                 GFP_KERNEL);
397         if (!_channels) {
398                 dev_err(&pdev->dev,
399                         "failed to allocate space for iio channels\n");
400                 return -ENOMEM;
401         }
402 
403         st->iio_vals = devm_kcalloc(&pdev->dev, attr_count,
404                                 sizeof(u32),
405                                 GFP_KERNEL);
406         if (!st->iio_vals) {
407                 dev_err(&pdev->dev,
408                         "failed to allocate space for iio values array\n");
409                 return -ENOMEM;
410         }
411 
412         for (i = 0, *chan_count = 0;
413         i < MAGN_3D_CHANNEL_MAX && *chan_count < attr_count;
414         i++){
415                 if (st->magn[i].index >= 0) {
416                         /* Setup IIO channel struct */
417                         (_channels[*chan_count]) = magn_3d_channels[i];
418                         (_channels[*chan_count]).scan_index = *chan_count;
419                         (_channels[*chan_count]).address = i;
420 
421                         /* Set magn_val_addr to iio value address */
422                         st->magn_val_addr[i] = &(st->iio_vals[*chan_count]);
423                         magn_3d_adjust_channel_bit_mask(_channels,
424                                                         *chan_count,
425                                                         st->magn[i].size);
426                         (*chan_count)++;
427                 }
428         }
429 
430         if (*chan_count <= 0) {
431                 dev_err(&pdev->dev,
432                         "failed to find any magnetic channels setup\n");
433                 return -EINVAL;
434         }
435 
436         *channels = _channels;
437 
438         dev_dbg(&pdev->dev, "magn_3d Setup %d IIO channels\n",
439                         *chan_count);
440 
441         st->magn_flux_attr.scale_precision = hid_sensor_format_scale(
442                                 HID_USAGE_SENSOR_COMPASS_3D,
443                                 &st->magn[CHANNEL_SCAN_INDEX_X],
444                                 &st->magn_flux_attr.scale_pre_decml,
445                                 &st->magn_flux_attr.scale_post_decml);
446         st->rot_attr.scale_precision
447                 = hid_sensor_format_scale(
448                         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
449                         &st->magn[CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP],
450                         &st->rot_attr.scale_pre_decml,
451                         &st->rot_attr.scale_post_decml);
452 
453         /* Set Sensitivity field ids, when there is no individual modifier */
454         if (st->magn_flux_attributes.sensitivity.index < 0) {
455                 sensor_hub_input_get_attribute_info(hsdev,
456                         HID_FEATURE_REPORT, usage_id,
457                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
458                         HID_USAGE_SENSOR_DATA_ORIENTATION,
459                         &st->magn_flux_attributes.sensitivity);
460                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
461                         st->magn_flux_attributes.sensitivity.index,
462                         st->magn_flux_attributes.sensitivity.report_id);
463         }
464         if (st->magn_flux_attributes.sensitivity.index < 0) {
465                 sensor_hub_input_get_attribute_info(hsdev,
466                         HID_FEATURE_REPORT, usage_id,
467                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
468                         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX,
469                         &st->magn_flux_attributes.sensitivity);
470                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
471                         st->magn_flux_attributes.sensitivity.index,
472                         st->magn_flux_attributes.sensitivity.report_id);
473         }
474         if (st->rot_attributes.sensitivity.index < 0) {
475                 sensor_hub_input_get_attribute_info(hsdev,
476                         HID_FEATURE_REPORT, usage_id,
477                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
478                         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
479                         &st->rot_attributes.sensitivity);
480                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
481                         st->rot_attributes.sensitivity.index,
482                         st->rot_attributes.sensitivity.report_id);
483         }
484 
485         return 0;
486 }
487 
488 /* Function to initialize the processing for usage id */
489 static int hid_magn_3d_probe(struct platform_device *pdev)
490 {
491         int ret = 0;
492         static char *name = "magn_3d";
493         struct iio_dev *indio_dev;
494         struct magn_3d_state *magn_state;
495         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
496         struct iio_chan_spec *channels;
497         int chan_count = 0;
498 
499         indio_dev = devm_iio_device_alloc(&pdev->dev,
500                                           sizeof(struct magn_3d_state));
501         if (indio_dev == NULL)
502                 return -ENOMEM;
503 
504         platform_set_drvdata(pdev, indio_dev);
505 
506         magn_state = iio_priv(indio_dev);
507         magn_state->magn_flux_attributes.hsdev = hsdev;
508         magn_state->magn_flux_attributes.pdev = pdev;
509 
510         ret = hid_sensor_parse_common_attributes(hsdev,
511                                 HID_USAGE_SENSOR_COMPASS_3D,
512                                 &magn_state->magn_flux_attributes);
513         if (ret) {
514                 dev_err(&pdev->dev, "failed to setup common attributes\n");
515                 return ret;
516         }
517         magn_state->rot_attributes = magn_state->magn_flux_attributes;
518 
519         ret = magn_3d_parse_report(pdev, hsdev,
520                                 &channels, &chan_count,
521                                 HID_USAGE_SENSOR_COMPASS_3D, magn_state);
522         if (ret) {
523                 dev_err(&pdev->dev, "failed to parse report\n");
524                 return ret;
525         }
526 
527         indio_dev->channels = channels;
528         indio_dev->num_channels = chan_count;
529         indio_dev->dev.parent = &pdev->dev;
530         indio_dev->info = &magn_3d_info;
531         indio_dev->name = name;
532         indio_dev->modes = INDIO_DIRECT_MODE;
533 
534         ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
535                 NULL, NULL);
536         if (ret) {
537                 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
538                 return ret;
539         }
540         atomic_set(&magn_state->magn_flux_attributes.data_ready, 0);
541         ret = hid_sensor_setup_trigger(indio_dev, name,
542                                         &magn_state->magn_flux_attributes);
543         if (ret < 0) {
544                 dev_err(&pdev->dev, "trigger setup failed\n");
545                 goto error_unreg_buffer_funcs;
546         }
547 
548         ret = iio_device_register(indio_dev);
549         if (ret) {
550                 dev_err(&pdev->dev, "device register failed\n");
551                 goto error_remove_trigger;
552         }
553 
554         magn_state->callbacks.send_event = magn_3d_proc_event;
555         magn_state->callbacks.capture_sample = magn_3d_capture_sample;
556         magn_state->callbacks.pdev = pdev;
557         ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D,
558                                         &magn_state->callbacks);
559         if (ret < 0) {
560                 dev_err(&pdev->dev, "callback reg failed\n");
561                 goto error_iio_unreg;
562         }
563 
564         return ret;
565 
566 error_iio_unreg:
567         iio_device_unregister(indio_dev);
568 error_remove_trigger:
569         hid_sensor_remove_trigger(&magn_state->magn_flux_attributes);
570 error_unreg_buffer_funcs:
571         iio_triggered_buffer_cleanup(indio_dev);
572         return ret;
573 }
574 
575 /* Function to deinitialize the processing for usage id */
576 static int hid_magn_3d_remove(struct platform_device *pdev)
577 {
578         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
579         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
580         struct magn_3d_state *magn_state = iio_priv(indio_dev);
581 
582         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
583         iio_device_unregister(indio_dev);
584         hid_sensor_remove_trigger(&magn_state->magn_flux_attributes);
585         iio_triggered_buffer_cleanup(indio_dev);
586 
587         return 0;
588 }
589 
590 static const struct platform_device_id hid_magn_3d_ids[] = {
591         {
592                 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
593                 .name = "HID-SENSOR-200083",
594         },
595         { /* sentinel */ }
596 };
597 MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids);
598 
599 static struct platform_driver hid_magn_3d_platform_driver = {
600         .id_table = hid_magn_3d_ids,
601         .driver = {
602                 .name   = KBUILD_MODNAME,
603                 .pm     = &hid_sensor_pm_ops,
604         },
605         .probe          = hid_magn_3d_probe,
606         .remove         = hid_magn_3d_remove,
607 };
608 module_platform_driver(hid_magn_3d_platform_driver);
609 
610 MODULE_DESCRIPTION("HID Sensor Magnetometer 3D");
611 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
612 MODULE_LICENSE("GPL");
613 

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