1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2020 InvenSense, Inc.
4 *
5 * Driver for InvenSense ICP-1010xx barometric pressure and temperature sensor.
6 *
7 * Datasheet:
8 * http://www.invensense.com/wp-content/uploads/2018/01/DS-000186-ICP-101xx-v1.2.pdf
9 */
10
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/mod_devicetable.h>
14 #include <linux/i2c.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/crc8.h>
17 #include <linux/mutex.h>
18 #include <linux/delay.h>
19 #include <linux/log2.h>
20 #include <linux/math64.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/iio/iio.h>
23
24 #define ICP10100_ID_REG_GET(_reg) ((_reg) & 0x003F)
25 #define ICP10100_ID_REG 0x08
26 #define ICP10100_RESPONSE_WORD_LENGTH 3
27 #define ICP10100_CRC8_WORD_LENGTH 2
28 #define ICP10100_CRC8_POLYNOMIAL 0x31
29 #define ICP10100_CRC8_INIT 0xFF
30
31 enum icp10100_mode {
32 ICP10100_MODE_LP, /* Low power mode: 1x sampling */
33 ICP10100_MODE_N, /* Normal mode: 2x sampling */
34 ICP10100_MODE_LN, /* Low noise mode: 4x sampling */
35 ICP10100_MODE_ULN, /* Ultra low noise mode: 8x sampling */
36 ICP10100_MODE_NB,
37 };
38
39 struct icp10100_state {
40 struct mutex lock;
41 struct i2c_client *client;
42 struct regulator *vdd;
43 enum icp10100_mode mode;
44 int16_t cal[4];
45 };
46
47 struct icp10100_command {
48 __be16 cmd;
49 unsigned long wait_us;
50 unsigned long wait_max_us;
51 size_t response_word_nb;
52 };
53
54 static const struct icp10100_command icp10100_cmd_soft_reset = {
55 .cmd = cpu_to_be16(0x805D),
56 .wait_us = 170,
57 .wait_max_us = 200,
58 .response_word_nb = 0,
59 };
60
61 static const struct icp10100_command icp10100_cmd_read_id = {
62 .cmd = cpu_to_be16(0xEFC8),
63 .wait_us = 0,
64 .response_word_nb = 1,
65 };
66
67 static const struct icp10100_command icp10100_cmd_read_otp = {
68 .cmd = cpu_to_be16(0xC7F7),
69 .wait_us = 0,
70 .response_word_nb = 1,
71 };
72
73 static const struct icp10100_command icp10100_cmd_measure[] = {
74 [ICP10100_MODE_LP] = {
75 .cmd = cpu_to_be16(0x401A),
76 .wait_us = 1800,
77 .wait_max_us = 2000,
78 .response_word_nb = 3,
79 },
80 [ICP10100_MODE_N] = {
81 .cmd = cpu_to_be16(0x48A3),
82 .wait_us = 6300,
83 .wait_max_us = 6500,
84 .response_word_nb = 3,
85 },
86 [ICP10100_MODE_LN] = {
87 .cmd = cpu_to_be16(0x5059),
88 .wait_us = 23800,
89 .wait_max_us = 24000,
90 .response_word_nb = 3,
91 },
92 [ICP10100_MODE_ULN] = {
93 .cmd = cpu_to_be16(0x58E0),
94 .wait_us = 94500,
95 .wait_max_us = 94700,
96 .response_word_nb = 3,
97 },
98 };
99
100 static const uint8_t icp10100_switch_mode_otp[] =
101 {0xC5, 0x95, 0x00, 0x66, 0x9c};
102
103 DECLARE_CRC8_TABLE(icp10100_crc8_table);
104
icp10100_i2c_xfer(struct i2c_adapter * adap,struct i2c_msg * msgs,int num)105 static inline int icp10100_i2c_xfer(struct i2c_adapter *adap,
106 struct i2c_msg *msgs, int num)
107 {
108 int ret;
109
110 ret = i2c_transfer(adap, msgs, num);
111 if (ret < 0)
112 return ret;
113
114 if (ret != num)
115 return -EIO;
116
117 return 0;
118 }
119
icp10100_send_cmd(struct icp10100_state * st,const struct icp10100_command * cmd,__be16 * buf,size_t buf_len)120 static int icp10100_send_cmd(struct icp10100_state *st,
121 const struct icp10100_command *cmd,
122 __be16 *buf, size_t buf_len)
123 {
124 size_t size = cmd->response_word_nb * ICP10100_RESPONSE_WORD_LENGTH;
125 uint8_t data[16];
126 uint8_t *ptr;
127 uint8_t *buf_ptr = (uint8_t *)buf;
128 struct i2c_msg msgs[2] = {
129 {
130 .addr = st->client->addr,
131 .flags = 0,
132 .len = 2,
133 .buf = (uint8_t *)&cmd->cmd,
134 }, {
135 .addr = st->client->addr,
136 .flags = I2C_M_RD,
137 .len = size,
138 .buf = data,
139 },
140 };
141 uint8_t crc;
142 unsigned int i;
143 int ret;
144
145 if (size > sizeof(data))
146 return -EINVAL;
147
148 if (cmd->response_word_nb > 0 &&
149 (buf == NULL || buf_len < (cmd->response_word_nb * 2)))
150 return -EINVAL;
151
152 dev_dbg(&st->client->dev, "sending cmd %#x\n", be16_to_cpu(cmd->cmd));
153
154 if (cmd->response_word_nb > 0 && cmd->wait_us == 0) {
155 /* direct command-response without waiting */
156 ret = icp10100_i2c_xfer(st->client->adapter, msgs,
157 ARRAY_SIZE(msgs));
158 if (ret)
159 return ret;
160 } else {
161 /* transfer command write */
162 ret = icp10100_i2c_xfer(st->client->adapter, &msgs[0], 1);
163 if (ret)
164 return ret;
165 if (cmd->wait_us > 0)
166 usleep_range(cmd->wait_us, cmd->wait_max_us);
167 /* transfer response read if needed */
168 if (cmd->response_word_nb > 0) {
169 ret = icp10100_i2c_xfer(st->client->adapter, &msgs[1], 1);
170 if (ret)
171 return ret;
172 } else {
173 return 0;
174 }
175 }
176
177 /* process read words with crc checking */
178 for (i = 0; i < cmd->response_word_nb; ++i) {
179 ptr = &data[i * ICP10100_RESPONSE_WORD_LENGTH];
180 crc = crc8(icp10100_crc8_table, ptr, ICP10100_CRC8_WORD_LENGTH,
181 ICP10100_CRC8_INIT);
182 if (crc != ptr[ICP10100_CRC8_WORD_LENGTH]) {
183 dev_err(&st->client->dev, "crc error recv=%#x calc=%#x\n",
184 ptr[ICP10100_CRC8_WORD_LENGTH], crc);
185 return -EIO;
186 }
187 *buf_ptr++ = ptr[0];
188 *buf_ptr++ = ptr[1];
189 }
190
191 return 0;
192 }
193
icp10100_read_cal_otp(struct icp10100_state * st)194 static int icp10100_read_cal_otp(struct icp10100_state *st)
195 {
196 __be16 val;
197 int i;
198 int ret;
199
200 /* switch into OTP read mode */
201 ret = i2c_master_send(st->client, icp10100_switch_mode_otp,
202 ARRAY_SIZE(icp10100_switch_mode_otp));
203 if (ret < 0)
204 return ret;
205 if (ret != ARRAY_SIZE(icp10100_switch_mode_otp))
206 return -EIO;
207
208 /* read 4 calibration values */
209 for (i = 0; i < 4; ++i) {
210 ret = icp10100_send_cmd(st, &icp10100_cmd_read_otp,
211 &val, sizeof(val));
212 if (ret)
213 return ret;
214 st->cal[i] = be16_to_cpu(val);
215 dev_dbg(&st->client->dev, "cal[%d] = %d\n", i, st->cal[i]);
216 }
217
218 return 0;
219 }
220
icp10100_init_chip(struct icp10100_state * st)221 static int icp10100_init_chip(struct icp10100_state *st)
222 {
223 __be16 val;
224 uint16_t id;
225 int ret;
226
227 /* read and check id */
228 ret = icp10100_send_cmd(st, &icp10100_cmd_read_id, &val, sizeof(val));
229 if (ret)
230 return ret;
231 id = ICP10100_ID_REG_GET(be16_to_cpu(val));
232 if (id != ICP10100_ID_REG) {
233 dev_err(&st->client->dev, "invalid id %#x\n", id);
234 return -ENODEV;
235 }
236
237 /* read calibration data from OTP */
238 ret = icp10100_read_cal_otp(st);
239 if (ret)
240 return ret;
241
242 /* reset chip */
243 return icp10100_send_cmd(st, &icp10100_cmd_soft_reset, NULL, 0);
244 }
245
icp10100_get_measures(struct icp10100_state * st,uint32_t * pressure,uint16_t * temperature)246 static int icp10100_get_measures(struct icp10100_state *st,
247 uint32_t *pressure, uint16_t *temperature)
248 {
249 const struct icp10100_command *cmd;
250 __be16 measures[3];
251 int ret;
252
253 ret = pm_runtime_resume_and_get(&st->client->dev);
254 if (ret < 0)
255 return ret;
256
257 mutex_lock(&st->lock);
258 cmd = &icp10100_cmd_measure[st->mode];
259 ret = icp10100_send_cmd(st, cmd, measures, sizeof(measures));
260 mutex_unlock(&st->lock);
261 if (ret)
262 goto error_measure;
263
264 *pressure = (be16_to_cpu(measures[0]) << 8) |
265 (be16_to_cpu(measures[1]) >> 8);
266 *temperature = be16_to_cpu(measures[2]);
267
268 pm_runtime_mark_last_busy(&st->client->dev);
269 error_measure:
270 pm_runtime_put_autosuspend(&st->client->dev);
271 return ret;
272 }
273
icp10100_get_pressure(struct icp10100_state * st,uint32_t raw_pressure,uint16_t raw_temp)274 static uint32_t icp10100_get_pressure(struct icp10100_state *st,
275 uint32_t raw_pressure, uint16_t raw_temp)
276 {
277 static int32_t p_calib[] = {45000, 80000, 105000};
278 static int32_t lut_lower = 3670016;
279 static int32_t lut_upper = 12058624;
280 static int32_t inv_quadr_factor = 16777216;
281 static int32_t offset_factor = 2048;
282 int64_t val1, val2;
283 int32_t p_lut[3];
284 int32_t t, t_square;
285 int64_t a, b, c;
286 uint32_t pressure_mPa;
287
288 dev_dbg(&st->client->dev, "raw: pressure = %u, temp = %u\n",
289 raw_pressure, raw_temp);
290
291 /* compute p_lut values */
292 t = (int32_t)raw_temp - 32768;
293 t_square = t * t;
294 val1 = (int64_t)st->cal[0] * (int64_t)t_square;
295 p_lut[0] = lut_lower + (int32_t)div_s64(val1, inv_quadr_factor);
296 val1 = (int64_t)st->cal[1] * (int64_t)t_square;
297 p_lut[1] = offset_factor * st->cal[3] +
298 (int32_t)div_s64(val1, inv_quadr_factor);
299 val1 = (int64_t)st->cal[2] * (int64_t)t_square;
300 p_lut[2] = lut_upper + (int32_t)div_s64(val1, inv_quadr_factor);
301 dev_dbg(&st->client->dev, "p_lut = [%d, %d, %d]\n",
302 p_lut[0], p_lut[1], p_lut[2]);
303
304 /* compute a, b, c factors */
305 val1 = (int64_t)p_lut[0] * (int64_t)p_lut[1] *
306 (int64_t)(p_calib[0] - p_calib[1]) +
307 (int64_t)p_lut[1] * (int64_t)p_lut[2] *
308 (int64_t)(p_calib[1] - p_calib[2]) +
309 (int64_t)p_lut[2] * (int64_t)p_lut[0] *
310 (int64_t)(p_calib[2] - p_calib[0]);
311 val2 = (int64_t)p_lut[2] * (int64_t)(p_calib[0] - p_calib[1]) +
312 (int64_t)p_lut[0] * (int64_t)(p_calib[1] - p_calib[2]) +
313 (int64_t)p_lut[1] * (int64_t)(p_calib[2] - p_calib[0]);
314 c = div64_s64(val1, val2);
315 dev_dbg(&st->client->dev, "val1 = %lld, val2 = %lld, c = %lld\n",
316 val1, val2, c);
317 val1 = (int64_t)p_calib[0] * (int64_t)p_lut[0] -
318 (int64_t)p_calib[1] * (int64_t)p_lut[1] -
319 (int64_t)(p_calib[1] - p_calib[0]) * c;
320 val2 = (int64_t)p_lut[0] - (int64_t)p_lut[1];
321 a = div64_s64(val1, val2);
322 dev_dbg(&st->client->dev, "val1 = %lld, val2 = %lld, a = %lld\n",
323 val1, val2, a);
324 b = ((int64_t)p_calib[0] - a) * ((int64_t)p_lut[0] + c);
325 dev_dbg(&st->client->dev, "b = %lld\n", b);
326
327 /*
328 * pressure_Pa = a + (b / (c + raw_pressure))
329 * pressure_mPa = 1000 * pressure_Pa
330 */
331 pressure_mPa = 1000LL * a + div64_s64(1000LL * b, c + raw_pressure);
332
333 return pressure_mPa;
334 }
335
icp10100_read_raw_measures(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2)336 static int icp10100_read_raw_measures(struct iio_dev *indio_dev,
337 struct iio_chan_spec const *chan,
338 int *val, int *val2)
339 {
340 struct icp10100_state *st = iio_priv(indio_dev);
341 uint32_t raw_pressure;
342 uint16_t raw_temp;
343 uint32_t pressure_mPa;
344 int ret;
345
346 if (!iio_device_claim_direct(indio_dev))
347 return -EBUSY;
348
349 ret = icp10100_get_measures(st, &raw_pressure, &raw_temp);
350 if (ret)
351 goto error_release;
352
353 switch (chan->type) {
354 case IIO_PRESSURE:
355 pressure_mPa = icp10100_get_pressure(st, raw_pressure,
356 raw_temp);
357 /* mPa to kPa */
358 *val = pressure_mPa / 1000000;
359 *val2 = pressure_mPa % 1000000;
360 ret = IIO_VAL_INT_PLUS_MICRO;
361 break;
362 case IIO_TEMP:
363 *val = raw_temp;
364 ret = IIO_VAL_INT;
365 break;
366 default:
367 ret = -EINVAL;
368 break;
369 }
370
371 error_release:
372 iio_device_release_direct(indio_dev);
373 return ret;
374 }
375
icp10100_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long mask)376 static int icp10100_read_raw(struct iio_dev *indio_dev,
377 struct iio_chan_spec const *chan,
378 int *val, int *val2, long mask)
379 {
380 struct icp10100_state *st = iio_priv(indio_dev);
381
382 switch (mask) {
383 case IIO_CHAN_INFO_RAW:
384 case IIO_CHAN_INFO_PROCESSED:
385 return icp10100_read_raw_measures(indio_dev, chan, val, val2);
386 case IIO_CHAN_INFO_SCALE:
387 switch (chan->type) {
388 case IIO_TEMP:
389 /* 1000 * 175°C / 65536 in m°C */
390 *val = 2;
391 *val2 = 670288;
392 return IIO_VAL_INT_PLUS_MICRO;
393 default:
394 return -EINVAL;
395 }
396 break;
397 case IIO_CHAN_INFO_OFFSET:
398 switch (chan->type) {
399 case IIO_TEMP:
400 /* 1000 * -45°C in m°C */
401 *val = -45000;
402 return IIO_VAL_INT;
403 default:
404 return -EINVAL;
405 }
406 break;
407 case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
408 mutex_lock(&st->lock);
409 *val = 1 << st->mode;
410 mutex_unlock(&st->lock);
411 return IIO_VAL_INT;
412 default:
413 return -EINVAL;
414 }
415 }
416
icp10100_read_avail(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,const int ** vals,int * type,int * length,long mask)417 static int icp10100_read_avail(struct iio_dev *indio_dev,
418 struct iio_chan_spec const *chan,
419 const int **vals, int *type, int *length,
420 long mask)
421 {
422 static int oversamplings[] = {1, 2, 4, 8};
423
424 switch (mask) {
425 case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
426 *vals = oversamplings;
427 *type = IIO_VAL_INT;
428 *length = ARRAY_SIZE(oversamplings);
429 return IIO_AVAIL_LIST;
430 default:
431 return -EINVAL;
432 }
433 }
434
icp10100_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long mask)435 static int icp10100_write_raw(struct iio_dev *indio_dev,
436 struct iio_chan_spec const *chan,
437 int val, int val2, long mask)
438 {
439 struct icp10100_state *st = iio_priv(indio_dev);
440 unsigned int mode;
441
442 switch (mask) {
443 case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
444 /* oversampling is always positive and a power of 2 */
445 if (val <= 0 || !is_power_of_2(val))
446 return -EINVAL;
447 mode = ilog2(val);
448 if (mode >= ICP10100_MODE_NB)
449 return -EINVAL;
450 if (!iio_device_claim_direct(indio_dev))
451 return -EBUSY;
452 mutex_lock(&st->lock);
453 st->mode = mode;
454 mutex_unlock(&st->lock);
455 iio_device_release_direct(indio_dev);
456 return 0;
457 default:
458 return -EINVAL;
459 }
460 }
461
icp10100_write_raw_get_fmt(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,long mask)462 static int icp10100_write_raw_get_fmt(struct iio_dev *indio_dev,
463 struct iio_chan_spec const *chan,
464 long mask)
465 {
466 switch (mask) {
467 case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
468 return IIO_VAL_INT;
469 default:
470 return -EINVAL;
471 }
472 }
473
474 static const struct iio_info icp10100_info = {
475 .read_raw = icp10100_read_raw,
476 .read_avail = icp10100_read_avail,
477 .write_raw = icp10100_write_raw,
478 .write_raw_get_fmt = icp10100_write_raw_get_fmt,
479 };
480
481 static const struct iio_chan_spec icp10100_channels[] = {
482 {
483 .type = IIO_PRESSURE,
484 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
485 .info_mask_shared_by_all =
486 BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
487 .info_mask_shared_by_all_available =
488 BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
489 }, {
490 .type = IIO_TEMP,
491 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
492 BIT(IIO_CHAN_INFO_SCALE) |
493 BIT(IIO_CHAN_INFO_OFFSET),
494 .info_mask_shared_by_all =
495 BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
496 .info_mask_shared_by_all_available =
497 BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),
498 },
499 };
500
icp10100_enable_regulator(struct icp10100_state * st)501 static int icp10100_enable_regulator(struct icp10100_state *st)
502 {
503 int ret;
504
505 ret = regulator_enable(st->vdd);
506 if (ret)
507 return ret;
508 msleep(100);
509
510 return 0;
511 }
512
icp10100_disable_regulator_action(void * data)513 static void icp10100_disable_regulator_action(void *data)
514 {
515 struct icp10100_state *st = data;
516 int ret;
517
518 ret = regulator_disable(st->vdd);
519 if (ret)
520 dev_err(&st->client->dev, "error %d disabling vdd\n", ret);
521 }
522
icp10100_pm_disable(void * data)523 static void icp10100_pm_disable(void *data)
524 {
525 struct device *dev = data;
526
527 pm_runtime_disable(dev);
528 }
529
icp10100_probe(struct i2c_client * client)530 static int icp10100_probe(struct i2c_client *client)
531 {
532 struct iio_dev *indio_dev;
533 struct icp10100_state *st;
534 int ret;
535
536 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
537 dev_err(&client->dev, "plain i2c transactions not supported\n");
538 return -ENODEV;
539 }
540
541 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
542 if (!indio_dev)
543 return -ENOMEM;
544
545 i2c_set_clientdata(client, indio_dev);
546 indio_dev->name = client->name;
547 indio_dev->modes = INDIO_DIRECT_MODE;
548 indio_dev->channels = icp10100_channels;
549 indio_dev->num_channels = ARRAY_SIZE(icp10100_channels);
550 indio_dev->info = &icp10100_info;
551
552 st = iio_priv(indio_dev);
553 mutex_init(&st->lock);
554 st->client = client;
555 st->mode = ICP10100_MODE_N;
556
557 st->vdd = devm_regulator_get(&client->dev, "vdd");
558 if (IS_ERR(st->vdd))
559 return PTR_ERR(st->vdd);
560
561 ret = icp10100_enable_regulator(st);
562 if (ret)
563 return ret;
564
565 ret = devm_add_action_or_reset(&client->dev,
566 icp10100_disable_regulator_action, st);
567 if (ret)
568 return ret;
569
570 /* has to be done before the first i2c communication */
571 crc8_populate_msb(icp10100_crc8_table, ICP10100_CRC8_POLYNOMIAL);
572
573 ret = icp10100_init_chip(st);
574 if (ret) {
575 dev_err(&client->dev, "init chip error %d\n", ret);
576 return ret;
577 }
578
579 /* enable runtime pm with autosuspend delay of 2s */
580 pm_runtime_get_noresume(&client->dev);
581 pm_runtime_set_active(&client->dev);
582 pm_runtime_enable(&client->dev);
583 pm_runtime_set_autosuspend_delay(&client->dev, 2000);
584 pm_runtime_use_autosuspend(&client->dev);
585 pm_runtime_put(&client->dev);
586 ret = devm_add_action_or_reset(&client->dev, icp10100_pm_disable,
587 &client->dev);
588 if (ret)
589 return ret;
590
591 return devm_iio_device_register(&client->dev, indio_dev);
592 }
593
icp10100_suspend(struct device * dev)594 static int icp10100_suspend(struct device *dev)
595 {
596 struct icp10100_state *st = iio_priv(dev_get_drvdata(dev));
597 int ret;
598
599 mutex_lock(&st->lock);
600 ret = regulator_disable(st->vdd);
601 mutex_unlock(&st->lock);
602
603 return ret;
604 }
605
icp10100_resume(struct device * dev)606 static int icp10100_resume(struct device *dev)
607 {
608 struct icp10100_state *st = iio_priv(dev_get_drvdata(dev));
609 int ret;
610
611 mutex_lock(&st->lock);
612
613 ret = icp10100_enable_regulator(st);
614 if (ret)
615 goto out_unlock;
616
617 /* reset chip */
618 ret = icp10100_send_cmd(st, &icp10100_cmd_soft_reset, NULL, 0);
619
620 out_unlock:
621 mutex_unlock(&st->lock);
622 return ret;
623 }
624
625 static DEFINE_RUNTIME_DEV_PM_OPS(icp10100_pm, icp10100_suspend, icp10100_resume,
626 NULL);
627
628 static const struct of_device_id icp10100_of_match[] = {
629 {
630 .compatible = "invensense,icp10100",
631 },
632 { }
633 };
634 MODULE_DEVICE_TABLE(of, icp10100_of_match);
635
636 static const struct i2c_device_id icp10100_id[] = {
637 { "icp10100" },
638 { }
639 };
640 MODULE_DEVICE_TABLE(i2c, icp10100_id);
641
642 static struct i2c_driver icp10100_driver = {
643 .driver = {
644 .name = "icp10100",
645 .pm = pm_ptr(&icp10100_pm),
646 .of_match_table = icp10100_of_match,
647 },
648 .probe = icp10100_probe,
649 .id_table = icp10100_id,
650 };
651 module_i2c_driver(icp10100_driver);
652
653 MODULE_AUTHOR("InvenSense, Inc.");
654 MODULE_DESCRIPTION("InvenSense icp10100 driver");
655 MODULE_LICENSE("GPL");
656