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Linux 4.16.11
[linux/fpc-iii.git] / drivers / iio / accel / bma180.c
blobcb9765a3de60719788ae436ffaac9de09e7ba323
1 /*
2 * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
3 *
4 * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
5 *
6 * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
7 *
8 * This file is subject to the terms and conditions of version 2 of
9 * the GNU General Public License. See the file COPYING in the main
10 * directory of this archive for more details.
11 *
12 * SPI is not supported by driver
13 * BMA180: 7-bit I2C slave address 0x40 or 0x41
14 * BMA250: 7-bit I2C slave address 0x18 or 0x19
15 */
16
17 #include <linux/module.h>
18 #include <linux/i2c.h>
19 #include <linux/interrupt.h>
20 #include <linux/delay.h>
21 #include <linux/of_device.h>
22 #include <linux/of.h>
23 #include <linux/bitops.h>
24 #include <linux/slab.h>
25 #include <linux/string.h>
26 #include <linux/iio/iio.h>
27 #include <linux/iio/sysfs.h>
28 #include <linux/iio/buffer.h>
29 #include <linux/iio/trigger.h>
30 #include <linux/iio/trigger_consumer.h>
31 #include <linux/iio/triggered_buffer.h>
32
33 #define BMA180_DRV_NAME "bma180"
34 #define BMA180_IRQ_NAME "bma180_event"
35
36 enum chip_ids {
37 BMA180,
38 BMA250,
39 };
40
41 struct bma180_data;
42
43 struct bma180_part_info {
44 const struct iio_chan_spec *channels;
45 unsigned int num_channels;
46 const int *scale_table;
47 unsigned int num_scales;
48 const int *bw_table;
49 unsigned int num_bw;
50
51 u8 int_reset_reg, int_reset_mask;
52 u8 sleep_reg, sleep_mask;
53 u8 bw_reg, bw_mask;
54 u8 scale_reg, scale_mask;
55 u8 power_reg, power_mask, lowpower_val;
56 u8 int_enable_reg, int_enable_mask;
57 u8 softreset_reg;
58
59 int (*chip_config)(struct bma180_data *data);
60 void (*chip_disable)(struct bma180_data *data);
61 };
62
63 /* Register set */
64 #define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */
65 #define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */
66 #define BMA180_TEMP 0x08
67 #define BMA180_CTRL_REG0 0x0d
68 #define BMA180_RESET 0x10
69 #define BMA180_BW_TCS 0x20
70 #define BMA180_CTRL_REG3 0x21
71 #define BMA180_TCO_Z 0x30
72 #define BMA180_OFFSET_LSB1 0x35
73
74 /* BMA180_CTRL_REG0 bits */
75 #define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */
76 #define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */
77 #define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */
78 #define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */
79
80 /* BMA180_CTRL_REG3 bits */
81 #define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */
82
83 /* BMA180_OFFSET_LSB1 skipping mode bit */
84 #define BMA180_SMP_SKIP BIT(0)
85
86 /* Bit masks for registers bit fields */
87 #define BMA180_RANGE 0x0e /* Range of measured accel values */
88 #define BMA180_BW 0xf0 /* Accel bandwidth */
89 #define BMA180_MODE_CONFIG 0x03 /* Config operation modes */
90
91 /* We have to write this value in reset register to do soft reset */
92 #define BMA180_RESET_VAL 0xb6
93
94 #define BMA180_ID_REG_VAL 0x03
95
96 /* Chip power modes */
97 #define BMA180_LOW_POWER 0x03
98
99 #define BMA250_RANGE_REG 0x0f
100 #define BMA250_BW_REG 0x10
101 #define BMA250_POWER_REG 0x11
102 #define BMA250_RESET_REG 0x14
103 #define BMA250_INT_ENABLE_REG 0x17
104 #define BMA250_INT_MAP_REG 0x1a
105 #define BMA250_INT_RESET_REG 0x21
106
107 #define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
108 #define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
109 #define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */
110 #define BMA250_LOWPOWER_MASK BIT(6)
111 #define BMA250_DATA_INTEN_MASK BIT(4)
112 #define BMA250_INT1_DATA_MASK BIT(0)
113 #define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
114
115 struct bma180_data {
116 struct i2c_client *client;
117 struct iio_trigger *trig;
118 const struct bma180_part_info *part_info;
119 struct mutex mutex;
120 bool sleep_state;
121 int scale;
122 int bw;
123 bool pmode;
124 u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
125 };
126
127 enum bma180_chan {
128 AXIS_X,
129 AXIS_Y,
130 AXIS_Z,
131 TEMP
132 };
133
134 static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
135 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
136
137 static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
138 static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
139 0, 0, 306458 };
140
141 static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
142 {
143 int ret;
144
145 if (data->sleep_state)
146 return -EBUSY;
147
148 switch (chan) {
149 case TEMP:
150 ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
151 if (ret < 0)
152 dev_err(&data->client->dev, "failed to read temp register\n");
153 break;
154 default:
155 ret = i2c_smbus_read_word_data(data->client,
156 BMA180_ACC_X_LSB + chan * 2);
157 if (ret < 0)
158 dev_err(&data->client->dev,
159 "failed to read accel_%c register\n",
160 'x' + chan);
161 }
162
163 return ret;
164 }
165
166 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
167 {
168 int ret = i2c_smbus_read_byte_data(data->client, reg);
169 u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
170
171 if (ret < 0)
172 return ret;
173
174 return i2c_smbus_write_byte_data(data->client, reg, reg_val);
175 }
176
177 static int bma180_reset_intr(struct bma180_data *data)
178 {
179 int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
180 data->part_info->int_reset_mask, 1);
181
182 if (ret)
183 dev_err(&data->client->dev, "failed to reset interrupt\n");
184
185 return ret;
186 }
187
188 static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
189 {
190 int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
191 data->part_info->int_enable_mask, state);
192 if (ret)
193 goto err;
194 ret = bma180_reset_intr(data);
195 if (ret)
196 goto err;
197
198 return 0;
199
200 err:
201 dev_err(&data->client->dev,
202 "failed to set new data interrupt state %d\n", state);
203 return ret;
204 }
205
206 static int bma180_set_sleep_state(struct bma180_data *data, bool state)
207 {
208 int ret = bma180_set_bits(data, data->part_info->sleep_reg,
209 data->part_info->sleep_mask, state);
210
211 if (ret) {
212 dev_err(&data->client->dev,
213 "failed to set sleep state %d\n", state);
214 return ret;
215 }
216 data->sleep_state = state;
217
218 return 0;
219 }
220
221 static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
222 {
223 int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
224
225 if (ret)
226 dev_err(&data->client->dev,
227 "failed to set ee writing state %d\n", state);
228
229 return ret;
230 }
231
232 static int bma180_set_bw(struct bma180_data *data, int val)
233 {
234 int ret, i;
235
236 if (data->sleep_state)
237 return -EBUSY;
238
239 for (i = 0; i < data->part_info->num_bw; ++i) {
240 if (data->part_info->bw_table[i] == val) {
241 ret = bma180_set_bits(data, data->part_info->bw_reg,
242 data->part_info->bw_mask, i);
243 if (ret) {
244 dev_err(&data->client->dev,
245 "failed to set bandwidth\n");
246 return ret;
247 }
248 data->bw = val;
249 return 0;
250 }
251 }
252
253 return -EINVAL;
254 }
255
256 static int bma180_set_scale(struct bma180_data *data, int val)
257 {
258 int ret, i;
259
260 if (data->sleep_state)
261 return -EBUSY;
262
263 for (i = 0; i < data->part_info->num_scales; ++i)
264 if (data->part_info->scale_table[i] == val) {
265 ret = bma180_set_bits(data, data->part_info->scale_reg,
266 data->part_info->scale_mask, i);
267 if (ret) {
268 dev_err(&data->client->dev,
269 "failed to set scale\n");
270 return ret;
271 }
272 data->scale = val;
273 return 0;
274 }
275
276 return -EINVAL;
277 }
278
279 static int bma180_set_pmode(struct bma180_data *data, bool mode)
280 {
281 u8 reg_val = mode ? data->part_info->lowpower_val : 0;
282 int ret = bma180_set_bits(data, data->part_info->power_reg,
283 data->part_info->power_mask, reg_val);
284
285 if (ret) {
286 dev_err(&data->client->dev, "failed to set power mode\n");
287 return ret;
288 }
289 data->pmode = mode;
290
291 return 0;
292 }
293
294 static int bma180_soft_reset(struct bma180_data *data)
295 {
296 int ret = i2c_smbus_write_byte_data(data->client,
297 data->part_info->softreset_reg, BMA180_RESET_VAL);
298
299 if (ret)
300 dev_err(&data->client->dev, "failed to reset the chip\n");
301
302 return ret;
303 }
304
305 static int bma180_chip_init(struct bma180_data *data)
306 {
307 /* Try to read chip_id register. It must return 0x03. */
308 int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
309
310 if (ret < 0)
311 return ret;
312 if (ret != BMA180_ID_REG_VAL)
313 return -ENODEV;
314
315 ret = bma180_soft_reset(data);
316 if (ret)
317 return ret;
318 /*
319 * No serial transaction should occur within minimum 10 us
320 * after soft_reset command
321 */
322 msleep(20);
323
324 ret = bma180_set_new_data_intr_state(data, false);
325 if (ret)
326 return ret;
327
328 return bma180_set_pmode(data, false);
329 }
330
331 static int bma180_chip_config(struct bma180_data *data)
332 {
333 int ret = bma180_chip_init(data);
334
335 if (ret)
336 goto err;
337 ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
338 if (ret)
339 goto err;
340 ret = bma180_set_ee_writing_state(data, true);
341 if (ret)
342 goto err;
343 ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
344 if (ret)
345 goto err;
346 ret = bma180_set_bw(data, 20); /* 20 Hz */
347 if (ret)
348 goto err;
349 ret = bma180_set_scale(data, 2452); /* 2 G */
350 if (ret)
351 goto err;
352
353 return 0;
354
355 err:
356 dev_err(&data->client->dev, "failed to config the chip\n");
357 return ret;
358 }
359
360 static int bma250_chip_config(struct bma180_data *data)
361 {
362 int ret = bma180_chip_init(data);
363
364 if (ret)
365 goto err;
366 ret = bma180_set_bw(data, 16); /* 16 Hz */
367 if (ret)
368 goto err;
369 ret = bma180_set_scale(data, 38344); /* 2 G */
370 if (ret)
371 goto err;
372 ret = bma180_set_bits(data, BMA250_INT_MAP_REG,
373 BMA250_INT1_DATA_MASK, 1);
374 if (ret)
375 goto err;
376
377 return 0;
378
379 err:
380 dev_err(&data->client->dev, "failed to config the chip\n");
381 return ret;
382 }
383
384 static void bma180_chip_disable(struct bma180_data *data)
385 {
386 if (bma180_set_new_data_intr_state(data, false))
387 goto err;
388 if (bma180_set_ee_writing_state(data, false))
389 goto err;
390 if (bma180_set_sleep_state(data, true))
391 goto err;
392
393 return;
394
395 err:
396 dev_err(&data->client->dev, "failed to disable the chip\n");
397 }
398
399 static void bma250_chip_disable(struct bma180_data *data)
400 {
401 if (bma180_set_new_data_intr_state(data, false))
402 goto err;
403 if (bma180_set_sleep_state(data, true))
404 goto err;
405
406 return;
407
408 err:
409 dev_err(&data->client->dev, "failed to disable the chip\n");
410 }
411
412 static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
413 bool micros)
414 {
415 size_t len = 0;
416 int i;
417
418 for (i = 0; i < n; i++) {
419 if (!vals[i])
420 continue;
421 len += scnprintf(buf + len, PAGE_SIZE - len,
422 micros ? "0.%06d " : "%d ", vals[i]);
423 }
424 buf[len - 1] = '\n';
425
426 return len;
427 }
428
429 static ssize_t bma180_show_filter_freq_avail(struct device *dev,
430 struct device_attribute *attr, char *buf)
431 {
432 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
433
434 return bma180_show_avail(buf, data->part_info->bw_table,
435 data->part_info->num_bw, false);
436 }
437
438 static ssize_t bma180_show_scale_avail(struct device *dev,
439 struct device_attribute *attr, char *buf)
440 {
441 struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
442
443 return bma180_show_avail(buf, data->part_info->scale_table,
444 data->part_info->num_scales, true);
445 }
446
447 static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
448 S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
449
450 static IIO_DEVICE_ATTR(in_accel_scale_available,
451 S_IRUGO, bma180_show_scale_avail, NULL, 0);
452
453 static struct attribute *bma180_attributes[] = {
454 &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
455 dev_attr.attr,
456 &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
457 NULL,
458 };
459
460 static const struct attribute_group bma180_attrs_group = {
461 .attrs = bma180_attributes,
462 };
463
464 static int bma180_read_raw(struct iio_dev *indio_dev,
465 struct iio_chan_spec const *chan, int *val, int *val2,
466 long mask)
467 {
468 struct bma180_data *data = iio_priv(indio_dev);
469 int ret;
470
471 switch (mask) {
472 case IIO_CHAN_INFO_RAW:
473 ret = iio_device_claim_direct_mode(indio_dev);
474 if (ret)
475 return ret;
476
477 mutex_lock(&data->mutex);
478 ret = bma180_get_data_reg(data, chan->scan_index);
479 mutex_unlock(&data->mutex);
480 iio_device_release_direct_mode(indio_dev);
481 if (ret < 0)
482 return ret;
483 *val = sign_extend32(ret >> chan->scan_type.shift,
484 chan->scan_type.realbits - 1);
485 return IIO_VAL_INT;
486 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
487 *val = data->bw;
488 return IIO_VAL_INT;
489 case IIO_CHAN_INFO_SCALE:
490 switch (chan->type) {
491 case IIO_ACCEL:
492 *val = 0;
493 *val2 = data->scale;
494 return IIO_VAL_INT_PLUS_MICRO;
495 case IIO_TEMP:
496 *val = 500;
497 return IIO_VAL_INT;
498 default:
499 return -EINVAL;
500 }
501 case IIO_CHAN_INFO_OFFSET:
502 *val = 48; /* 0 LSB @ 24 degree C */
503 return IIO_VAL_INT;
504 default:
505 return -EINVAL;
506 }
507 }
508
509 static int bma180_write_raw(struct iio_dev *indio_dev,
510 struct iio_chan_spec const *chan, int val, int val2, long mask)
511 {
512 struct bma180_data *data = iio_priv(indio_dev);
513 int ret;
514
515 switch (mask) {
516 case IIO_CHAN_INFO_SCALE:
517 if (val)
518 return -EINVAL;
519 mutex_lock(&data->mutex);
520 ret = bma180_set_scale(data, val2);
521 mutex_unlock(&data->mutex);
522 return ret;
523 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
524 if (val2)
525 return -EINVAL;
526 mutex_lock(&data->mutex);
527 ret = bma180_set_bw(data, val);
528 mutex_unlock(&data->mutex);
529 return ret;
530 default:
531 return -EINVAL;
532 }
533 }
534
535 static const struct iio_info bma180_info = {
536 .attrs = &bma180_attrs_group,
537 .read_raw = bma180_read_raw,
538 .write_raw = bma180_write_raw,
539 };
540
541 static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
542
543 static int bma180_get_power_mode(struct iio_dev *indio_dev,
544 const struct iio_chan_spec *chan)
545 {
546 struct bma180_data *data = iio_priv(indio_dev);
547
548 return data->pmode;
549 }
550
551 static int bma180_set_power_mode(struct iio_dev *indio_dev,
552 const struct iio_chan_spec *chan, unsigned int mode)
553 {
554 struct bma180_data *data = iio_priv(indio_dev);
555 int ret;
556
557 mutex_lock(&data->mutex);
558 ret = bma180_set_pmode(data, mode);
559 mutex_unlock(&data->mutex);
560
561 return ret;
562 }
563
564 static const struct iio_enum bma180_power_mode_enum = {
565 .items = bma180_power_modes,
566 .num_items = ARRAY_SIZE(bma180_power_modes),
567 .get = bma180_get_power_mode,
568 .set = bma180_set_power_mode,
569 };
570
571 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
572 IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
573 IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
574 { },
575 };
576
577 #define BMA180_ACC_CHANNEL(_axis, _bits) { \
578 .type = IIO_ACCEL, \
579 .modified = 1, \
580 .channel2 = IIO_MOD_##_axis, \
581 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
582 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
583 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
584 .scan_index = AXIS_##_axis, \
585 .scan_type = { \
586 .sign = 's', \
587 .realbits = _bits, \
588 .storagebits = 16, \
589 .shift = 16 - _bits, \
590 }, \
591 .ext_info = bma180_ext_info, \
592 }
593
594 #define BMA180_TEMP_CHANNEL { \
595 .type = IIO_TEMP, \
596 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
597 BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
598 .scan_index = TEMP, \
599 .scan_type = { \
600 .sign = 's', \
601 .realbits = 8, \
602 .storagebits = 16, \
603 }, \
604 }
605
606 static const struct iio_chan_spec bma180_channels[] = {
607 BMA180_ACC_CHANNEL(X, 14),
608 BMA180_ACC_CHANNEL(Y, 14),
609 BMA180_ACC_CHANNEL(Z, 14),
610 BMA180_TEMP_CHANNEL,
611 IIO_CHAN_SOFT_TIMESTAMP(4),
612 };
613
614 static const struct iio_chan_spec bma250_channels[] = {
615 BMA180_ACC_CHANNEL(X, 10),
616 BMA180_ACC_CHANNEL(Y, 10),
617 BMA180_ACC_CHANNEL(Z, 10),
618 BMA180_TEMP_CHANNEL,
619 IIO_CHAN_SOFT_TIMESTAMP(4),
620 };
621
622 static const struct bma180_part_info bma180_part_info[] = {
623 [BMA180] = {
624 bma180_channels, ARRAY_SIZE(bma180_channels),
625 bma180_scale_table, ARRAY_SIZE(bma180_scale_table),
626 bma180_bw_table, ARRAY_SIZE(bma180_bw_table),
627 BMA180_CTRL_REG0, BMA180_RESET_INT,
628 BMA180_CTRL_REG0, BMA180_SLEEP,
629 BMA180_BW_TCS, BMA180_BW,
630 BMA180_OFFSET_LSB1, BMA180_RANGE,
631 BMA180_TCO_Z, BMA180_MODE_CONFIG, BMA180_LOW_POWER,
632 BMA180_CTRL_REG3, BMA180_NEW_DATA_INT,
633 BMA180_RESET,
634 bma180_chip_config,
635 bma180_chip_disable,
636 },
637 [BMA250] = {
638 bma250_channels, ARRAY_SIZE(bma250_channels),
639 bma250_scale_table, ARRAY_SIZE(bma250_scale_table),
640 bma250_bw_table, ARRAY_SIZE(bma250_bw_table),
641 BMA250_INT_RESET_REG, BMA250_INT_RESET_MASK,
642 BMA250_POWER_REG, BMA250_SUSPEND_MASK,
643 BMA250_BW_REG, BMA250_BW_MASK,
644 BMA250_RANGE_REG, BMA250_RANGE_MASK,
645 BMA250_POWER_REG, BMA250_LOWPOWER_MASK, 1,
646 BMA250_INT_ENABLE_REG, BMA250_DATA_INTEN_MASK,
647 BMA250_RESET_REG,
648 bma250_chip_config,
649 bma250_chip_disable,
650 },
651 };
652
653 static irqreturn_t bma180_trigger_handler(int irq, void *p)
654 {
655 struct iio_poll_func *pf = p;
656 struct iio_dev *indio_dev = pf->indio_dev;
657 struct bma180_data *data = iio_priv(indio_dev);
658 s64 time_ns = iio_get_time_ns(indio_dev);
659 int bit, ret, i = 0;
660
661 mutex_lock(&data->mutex);
662
663 for_each_set_bit(bit, indio_dev->active_scan_mask,
664 indio_dev->masklength) {
665 ret = bma180_get_data_reg(data, bit);
666 if (ret < 0) {
667 mutex_unlock(&data->mutex);
668 goto err;
669 }
670 ((s16 *)data->buff)[i++] = ret;
671 }
672
673 mutex_unlock(&data->mutex);
674
675 iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
676 err:
677 iio_trigger_notify_done(indio_dev->trig);
678
679 return IRQ_HANDLED;
680 }
681
682 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
683 bool state)
684 {
685 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
686 struct bma180_data *data = iio_priv(indio_dev);
687
688 return bma180_set_new_data_intr_state(data, state);
689 }
690
691 static int bma180_trig_try_reen(struct iio_trigger *trig)
692 {
693 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
694 struct bma180_data *data = iio_priv(indio_dev);
695
696 return bma180_reset_intr(data);
697 }
698
699 static const struct iio_trigger_ops bma180_trigger_ops = {
700 .set_trigger_state = bma180_data_rdy_trigger_set_state,
701 .try_reenable = bma180_trig_try_reen,
702 };
703
704 static int bma180_probe(struct i2c_client *client,
705 const struct i2c_device_id *id)
706 {
707 struct bma180_data *data;
708 struct iio_dev *indio_dev;
709 enum chip_ids chip;
710 int ret;
711
712 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
713 if (!indio_dev)
714 return -ENOMEM;
715
716 data = iio_priv(indio_dev);
717 i2c_set_clientdata(client, indio_dev);
718 data->client = client;
719 if (client->dev.of_node)
720 chip = (enum chip_ids)of_device_get_match_data(&client->dev);
721 else
722 chip = id->driver_data;
723 data->part_info = &bma180_part_info[chip];
724
725 ret = data->part_info->chip_config(data);
726 if (ret < 0)
727 goto err_chip_disable;
728
729 mutex_init(&data->mutex);
730 indio_dev->dev.parent = &client->dev;
731 indio_dev->channels = data->part_info->channels;
732 indio_dev->num_channels = data->part_info->num_channels;
733 indio_dev->name = id->name;
734 indio_dev->modes = INDIO_DIRECT_MODE;
735 indio_dev->info = &bma180_info;
736
737 if (client->irq > 0) {
738 data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
739 indio_dev->id);
740 if (!data->trig) {
741 ret = -ENOMEM;
742 goto err_chip_disable;
743 }
744
745 ret = devm_request_irq(&client->dev, client->irq,
746 iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
747 "bma180_event", data->trig);
748 if (ret) {
749 dev_err(&client->dev, "unable to request IRQ\n");
750 goto err_trigger_free;
751 }
752
753 data->trig->dev.parent = &client->dev;
754 data->trig->ops = &bma180_trigger_ops;
755 iio_trigger_set_drvdata(data->trig, indio_dev);
756 indio_dev->trig = iio_trigger_get(data->trig);
757
758 ret = iio_trigger_register(data->trig);
759 if (ret)
760 goto err_trigger_free;
761 }
762
763 ret = iio_triggered_buffer_setup(indio_dev, NULL,
764 bma180_trigger_handler, NULL);
765 if (ret < 0) {
766 dev_err(&client->dev, "unable to setup iio triggered buffer\n");
767 goto err_trigger_unregister;
768 }
769
770 ret = iio_device_register(indio_dev);
771 if (ret < 0) {
772 dev_err(&client->dev, "unable to register iio device\n");
773 goto err_buffer_cleanup;
774 }
775
776 return 0;
777
778 err_buffer_cleanup:
779 iio_triggered_buffer_cleanup(indio_dev);
780 err_trigger_unregister:
781 if (data->trig)
782 iio_trigger_unregister(data->trig);
783 err_trigger_free:
784 iio_trigger_free(data->trig);
785 err_chip_disable:
786 data->part_info->chip_disable(data);
787
788 return ret;
789 }
790
791 static int bma180_remove(struct i2c_client *client)
792 {
793 struct iio_dev *indio_dev = i2c_get_clientdata(client);
794 struct bma180_data *data = iio_priv(indio_dev);
795
796 iio_device_unregister(indio_dev);
797 iio_triggered_buffer_cleanup(indio_dev);
798 if (data->trig) {
799 iio_trigger_unregister(data->trig);
800 iio_trigger_free(data->trig);
801 }
802
803 mutex_lock(&data->mutex);
804 data->part_info->chip_disable(data);
805 mutex_unlock(&data->mutex);
806
807 return 0;
808 }
809
810 #ifdef CONFIG_PM_SLEEP
811 static int bma180_suspend(struct device *dev)
812 {
813 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
814 struct bma180_data *data = iio_priv(indio_dev);
815 int ret;
816
817 mutex_lock(&data->mutex);
818 ret = bma180_set_sleep_state(data, true);
819 mutex_unlock(&data->mutex);
820
821 return ret;
822 }
823
824 static int bma180_resume(struct device *dev)
825 {
826 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
827 struct bma180_data *data = iio_priv(indio_dev);
828 int ret;
829
830 mutex_lock(&data->mutex);
831 ret = bma180_set_sleep_state(data, false);
832 mutex_unlock(&data->mutex);
833
834 return ret;
835 }
836
837 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
838 #define BMA180_PM_OPS (&bma180_pm_ops)
839 #else
840 #define BMA180_PM_OPS NULL
841 #endif
842
843 static const struct i2c_device_id bma180_ids[] = {
844 { "bma180", BMA180 },
845 { "bma250", BMA250 },
846 { }
847 };
848
849 MODULE_DEVICE_TABLE(i2c, bma180_ids);
850
851 static const struct of_device_id bma180_of_match[] = {
852 {
853 .compatible = "bosch,bma180",
854 .data = (void *)BMA180
855 },
856 {
857 .compatible = "bosch,bma250",
858 .data = (void *)BMA250
859 },
860 { }
861 };
862 MODULE_DEVICE_TABLE(of, bma180_of_match);
863
864 static struct i2c_driver bma180_driver = {
865 .driver = {
866 .name = "bma180",
867 .pm = BMA180_PM_OPS,
868 .of_match_table = bma180_of_match,
869 },
870 .probe = bma180_probe,
871 .remove = bma180_remove,
872 .id_table = bma180_ids,
873 };
874
875 module_i2c_driver(bma180_driver);
876
877 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
878 MODULE_AUTHOR("Texas Instruments, Inc.");
879 MODULE_DESCRIPTION("Bosch BMA180/BMA250 triaxial acceleration sensor");
880 MODULE_LICENSE("GPL");
Linux with added FPC-III support