drivers/iio/accel/bma180.c

   1 /*
   2  * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
   3  *
   4  * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
   5  *
   6  * This file is subject to the terms and conditions of version 2 of
   7  * the GNU General Public License.  See the file COPYING in the main
   8  * directory of this archive for more details.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/i2c.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/delay.h>
  15 #include <linux/of.h>
  16 #include <linux/bitops.h>
  17 #include <linux/slab.h>
  18 #include <linux/string.h>
  19 #include <linux/iio/iio.h>
  20 #include <linux/iio/sysfs.h>
  21 #include <linux/iio/buffer.h>
  22 #include <linux/iio/trigger.h>
  23 #include <linux/iio/trigger_consumer.h>
  24 #include <linux/iio/triggered_buffer.h>
  25
  26 #define BMA180_DRV_NAME "bma180"
  27 #define BMA180_IRQ_NAME "bma180_event"
  28
  29 /* Register set */
  30 #define BMA180_CHIP_ID          0x00 /* Need to distinguish BMA180 from other */
  31 #define BMA180_ACC_X_LSB        0x02 /* First of 6 registers of accel data */
  32 #define BMA180_CTRL_REG0        0x0d
  33 #define BMA180_RESET            0x10
  34 #define BMA180_BW_TCS           0x20
  35 #define BMA180_CTRL_REG3        0x21
  36 #define BMA180_TCO_Z            0x30
  37 #define BMA180_OFFSET_LSB1      0x35
  38
  39 /* BMA180_CTRL_REG0 bits */
  40 #define BMA180_DIS_WAKE_UP      BIT(0) /* Disable wake up mode */
  41 #define BMA180_SLEEP            BIT(1) /* 1 - chip will sleep */
  42 #define BMA180_EE_W             BIT(4) /* Unlock writing to addr from 0x20 */
  43 #define BMA180_RESET_INT        BIT(6) /* Reset pending interrupts */
  44
  45 /* BMA180_CTRL_REG3 bits */
  46 #define BMA180_NEW_DATA_INT     BIT(1) /* Intr every new accel data is ready */
  47
  48 /* BMA180_OFFSET_LSB1 skipping mode bit */
  49 #define BMA180_SMP_SKIP         BIT(0)
  50
  51 /* Bit masks for registers bit fields */
  52 #define BMA180_RANGE            0x0e /* Range of measured accel values*/
  53 #define BMA180_BW               0xf0 /* Accel bandwidth */
  54 #define BMA180_MODE_CONFIG      0x03 /* Config operation modes */
  55
  56 /* We have to write this value in reset register to do soft reset */
  57 #define BMA180_RESET_VAL        0xb6
  58
  59 #define BMA_180_ID_REG_VAL      0x03
  60
  61 /* Chip power modes */
  62 #define BMA180_LOW_NOISE        0x00
  63 #define BMA180_LOW_POWER        0x03
  64
  65 #define BMA180_LOW_NOISE_STR    "low_noise"
  66 #define BMA180_LOW_POWER_STR    "low_power"
  67
  68 /* Defaults values */
  69 #define BMA180_DEF_PMODE        0
  70 #define BMA180_DEF_BW           20
  71 #define BMA180_DEF_SCALE        250
  72
  73 /* Available values for sysfs */
  74 #define BMA180_FLP_FREQ_AVAILABLE \
  75         "10 20 40 75 150 300"
  76 #define BMA180_SCALE_AVAILABLE \
  77         "0.000130 0.000190 0.000250 0.000380 0.000500 0.000990 0.001980"
  78
  79 struct bma180_data {
  80         struct i2c_client *client;
  81         struct iio_trigger *trig;
  82         struct mutex mutex;
  83         int sleep_state;
  84         int scale;
  85         int bw;
  86         int pmode;
  87         char *buff;
  88 };
  89
  90 enum bma180_axis {
  91         AXIS_X,
  92         AXIS_Y,
  93         AXIS_Z,
  94 };
  95
  96 static int bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
  97 static int scale_table[] = { 130, 190, 250, 380, 500, 990, 1980 };
  98
  99 static int bma180_get_acc_reg(struct bma180_data *data, enum bma180_axis axis)
 100 {
 101         u8 reg = BMA180_ACC_X_LSB + axis * 2;
 102         int ret;
 103
 104         if (data->sleep_state)
 105                 return -EBUSY;
 106
 107         ret = i2c_smbus_read_word_data(data->client, reg);
 108         if (ret < 0)
 109                 dev_err(&data->client->dev,
 110                         "failed to read accel_%c registers\n", 'x' + axis);
 111
 112         return ret;
 113 }
 114
 115 static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
 116 {
 117         int ret = i2c_smbus_read_byte_data(data->client, reg);
 118         u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
 119
 120         if (ret < 0)
 121                 return ret;
 122
 123         return i2c_smbus_write_byte_data(data->client, reg, reg_val);
 124 }
 125
 126 static int bma180_reset_intr(struct bma180_data *data)
 127 {
 128         int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_RESET_INT, 1);
 129
 130         if (ret)
 131                 dev_err(&data->client->dev, "failed to reset interrupt\n");
 132
 133         return ret;
 134 }
 135
 136 static int bma180_set_new_data_intr_state(struct bma180_data *data, int state)
 137 {
 138         u8 reg_val = state ? BMA180_NEW_DATA_INT : 0x00;
 139         int ret = i2c_smbus_write_byte_data(data->client, BMA180_CTRL_REG3,
 140                         reg_val);
 141
 142         if (ret)
 143                 goto err;
 144         ret = bma180_reset_intr(data);
 145         if (ret)
 146                 goto err;
 147
 148         return 0;
 149
 150 err:
 151         dev_err(&data->client->dev,
 152                 "failed to set new data interrupt state %d\n", state);
 153         return ret;
 154 }
 155
 156 static int bma180_set_sleep_state(struct bma180_data *data, int state)
 157 {
 158         int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_SLEEP, state);
 159
 160         if (ret) {
 161                 dev_err(&data->client->dev,
 162                         "failed to set sleep state %d\n", state);
 163                 return ret;
 164         }
 165         data->sleep_state = state;
 166
 167         return 0;
 168 }
 169
 170 static int bma180_set_ee_writing_state(struct bma180_data *data, int state)
 171 {
 172         int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
 173
 174         if (ret)
 175                 dev_err(&data->client->dev,
 176                         "failed to set ee writing state %d\n", state);
 177
 178         return ret;
 179 }
 180
 181 static int bma180_set_bw(struct bma180_data *data, int val)
 182 {
 183         int ret, i;
 184
 185         if (data->sleep_state)
 186                 return -EBUSY;
 187
 188         for (i = 0; i < ARRAY_SIZE(bw_table); ++i) {
 189                 if (bw_table[i] == val) {
 190                         ret = bma180_set_bits(data,
 191                                         BMA180_BW_TCS, BMA180_BW, i);
 192                         if (ret) {
 193                                 dev_err(&data->client->dev,
 194                                         "failed to set bandwidth\n");
 195                                 return ret;
 196                         }
 197                         data->bw = val;
 198                         return 0;
 199                 }
 200         }
 201
 202         return -EINVAL;
 203 }
 204
 205 static int bma180_set_scale(struct bma180_data *data, int val)
 206 {
 207         int ret, i;
 208
 209         if (data->sleep_state)
 210                 return -EBUSY;
 211
 212         for (i = 0; i < ARRAY_SIZE(scale_table); ++i)
 213                 if (scale_table[i] == val) {
 214                         ret = bma180_set_bits(data,
 215                                         BMA180_OFFSET_LSB1, BMA180_RANGE, i);
 216                         if (ret) {
 217                                 dev_err(&data->client->dev,
 218                                         "failed to set scale\n");
 219                                 return ret;
 220                         }
 221                         data->scale = val;
 222                         return 0;
 223                 }
 224
 225         return -EINVAL;
 226 }
 227
 228 static int bma180_set_pmode(struct bma180_data *data, int mode)
 229 {
 230         u8 reg_val = mode ? BMA180_LOW_POWER : BMA180_LOW_NOISE;
 231         int ret = bma180_set_bits(data, BMA180_TCO_Z, BMA180_MODE_CONFIG,
 232                         reg_val);
 233
 234         if (ret) {
 235                 dev_err(&data->client->dev, "failed to set power mode\n");
 236                 return ret;
 237         }
 238         data->pmode = mode;
 239
 240         return 0;
 241 }
 242
 243 static int bma180_soft_reset(struct bma180_data *data)
 244 {
 245         int ret = i2c_smbus_write_byte_data(data->client,
 246                         BMA180_RESET, BMA180_RESET_VAL);
 247
 248         if (ret)
 249                 dev_err(&data->client->dev, "failed to reset the chip\n");
 250
 251         return ret;
 252 }
 253
 254 static int bma180_chip_init(struct bma180_data *data)
 255 {
 256         /* Try to read chip_id register. It must return 0x03. */
 257         int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
 258
 259         if (ret < 0)
 260                 goto err;
 261         if (ret != BMA_180_ID_REG_VAL) {
 262                 ret = -ENODEV;
 263                 goto err;
 264         }
 265
 266         ret = bma180_soft_reset(data);
 267         if (ret)
 268                 goto err;
 269         /*
 270          * No serial transaction should occur within minimum 10 us
 271          * after soft_reset command
 272          */
 273         msleep(20);
 274
 275         ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
 276         if (ret)
 277                 goto err;
 278         ret = bma180_set_ee_writing_state(data, 1);
 279         if (ret)
 280                 goto err;
 281         ret = bma180_set_new_data_intr_state(data, 0);
 282         if (ret)
 283                 goto err;
 284         ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
 285         if (ret)
 286                 goto err;
 287         ret = bma180_set_pmode(data, BMA180_DEF_PMODE);
 288         if (ret)
 289                 goto err;
 290         ret = bma180_set_bw(data, BMA180_DEF_BW);
 291         if (ret)
 292                 goto err;
 293         ret = bma180_set_scale(data, BMA180_DEF_SCALE);
 294         if (ret)
 295                 goto err;
 296
 297         return 0;
 298
 299 err:
 300         dev_err(&data->client->dev, "failed to init the chip\n");
 301         return ret;
 302 }
 303
 304 static void bma180_chip_disable(struct bma180_data *data)
 305 {
 306         if (bma180_set_new_data_intr_state(data, 0))
 307                 goto err;
 308         if (bma180_set_ee_writing_state(data, 0))
 309                 goto err;
 310         if (bma180_set_sleep_state(data, 1))
 311                 goto err;
 312
 313         return;
 314
 315 err:
 316         dev_err(&data->client->dev, "failed to disable the chip\n");
 317 }
 318
 319 static IIO_CONST_ATTR(in_accel_filter_low_pass_3db_frequency_available,
 320                 BMA180_FLP_FREQ_AVAILABLE);
 321 static IIO_CONST_ATTR(in_accel_scale_available, BMA180_SCALE_AVAILABLE);
 322
 323 static struct attribute *bma180_attributes[] = {
 324         &iio_const_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
 325         &iio_const_attr_in_accel_scale_available.dev_attr.attr,
 326         NULL,
 327 };
 328
 329 static const struct attribute_group bma180_attrs_group = {
 330         .attrs = bma180_attributes,
 331 };
 332
 333 static int bma180_read_raw(struct iio_dev *indio_dev,
 334                 struct iio_chan_spec const *chan, int *val, int *val2,
 335                 long mask)
 336 {
 337         struct bma180_data *data = iio_priv(indio_dev);
 338         int ret;
 339
 340         switch (mask) {
 341         case IIO_CHAN_INFO_RAW:
 342                 mutex_lock(&data->mutex);
 343                 if (iio_buffer_enabled(indio_dev))
 344                         ret = -EBUSY;
 345                 else
 346                         ret = bma180_get_acc_reg(data, chan->scan_index);
 347                 mutex_unlock(&data->mutex);
 348                 if (ret < 0)
 349                         return ret;
 350                 *val = (s16)ret >> chan->scan_type.shift;
 351                 return IIO_VAL_INT;
 352         case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 353                 *val = data->bw;
 354                 return IIO_VAL_INT;
 355         case IIO_CHAN_INFO_SCALE:
 356                 *val = 0;
 357                 *val2 = data->scale;
 358                 return IIO_VAL_INT_PLUS_MICRO;
 359         default:
 360                 return -EINVAL;
 361         }
 362 }
 363
 364 static int bma180_write_raw(struct iio_dev *indio_dev,
 365                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 366 {
 367         struct bma180_data *data = iio_priv(indio_dev);
 368         int ret;
 369
 370         switch (mask) {
 371         case IIO_CHAN_INFO_SCALE:
 372                 if (val)
 373                         return -EINVAL;
 374                 mutex_lock(&data->mutex);
 375                 ret = bma180_set_scale(data, val2);
 376                 mutex_unlock(&data->mutex);
 377                 return ret;
 378         case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
 379                 mutex_lock(&data->mutex);
 380                 ret = bma180_set_bw(data, val);
 381                 mutex_unlock(&data->mutex);
 382                 return ret;
 383         default:
 384                 return -EINVAL;
 385         }
 386 }
 387
 388 static int bma180_update_scan_mode(struct iio_dev *indio_dev,
 389                 const unsigned long *scan_mask)
 390 {
 391         struct bma180_data *data = iio_priv(indio_dev);
 392
 393         if (data->buff)
 394                 devm_kfree(&indio_dev->dev, data->buff);
 395         data->buff = devm_kzalloc(&indio_dev->dev,
 396                         indio_dev->scan_bytes, GFP_KERNEL);
 397         if (!data->buff)
 398                 return -ENOMEM;
 399
 400         return 0;
 401 }
 402
 403 static const struct iio_info bma180_info = {
 404         .attrs                  = &bma180_attrs_group,
 405         .read_raw               = bma180_read_raw,
 406         .write_raw              = bma180_write_raw,
 407         .update_scan_mode       = bma180_update_scan_mode,
 408         .driver_module          = THIS_MODULE,
 409 };
 410
 411 static const char * const bma180_power_modes[] = {
 412         BMA180_LOW_NOISE_STR,
 413         BMA180_LOW_POWER_STR,
 414 };
 415
 416 static int bma180_get_power_mode(struct iio_dev *indio_dev,
 417                 const struct iio_chan_spec *chan)
 418 {
 419         struct bma180_data *data = iio_priv(indio_dev);
 420
 421         return data->pmode;
 422 }
 423
 424 static int bma180_set_power_mode(struct iio_dev *indio_dev,
 425                 const struct iio_chan_spec *chan, unsigned int mode)
 426 {
 427         struct bma180_data *data = iio_priv(indio_dev);
 428         int ret;
 429
 430         mutex_lock(&data->mutex);
 431         ret = bma180_set_pmode(data, mode);
 432         mutex_unlock(&data->mutex);
 433
 434         return ret;
 435 }
 436
 437 static const struct iio_enum bma180_power_mode_enum = {
 438         .items = bma180_power_modes,
 439         .num_items = ARRAY_SIZE(bma180_power_modes),
 440         .get = bma180_get_power_mode,
 441         .set = bma180_set_power_mode,
 442 };
 443
 444 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
 445         IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
 446         IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
 447         { },
 448 };
 449
 450 #define BMA180_CHANNEL(_axis) {                                 \
 451         .type = IIO_ACCEL,                                              \
 452         .modified = 1,                                                  \
 453         .channel2 = IIO_MOD_##_axis,                                    \
 454         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |                  \
 455                 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),       \
 456         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),           \
 457         .scan_index = AXIS_##_axis,                                     \
 458         .scan_type = {                                                  \
 459                 .sign = 's',                                            \
 460                 .realbits = 14,                                         \
 461                 .storagebits = 16,                                      \
 462                 .shift = 2,                                             \
 463         },                                                              \
 464         .ext_info = bma180_ext_info,                                    \
 465 }
 466
 467 static const struct iio_chan_spec bma180_channels[] = {
 468         BMA180_CHANNEL(X),
 469         BMA180_CHANNEL(Y),
 470         BMA180_CHANNEL(Z),
 471         IIO_CHAN_SOFT_TIMESTAMP(3),
 472 };
 473
 474 static irqreturn_t bma180_trigger_handler(int irq, void *p)
 475 {
 476         struct iio_poll_func *pf = p;
 477         struct iio_dev *indio_dev = pf->indio_dev;
 478         struct bma180_data *data = iio_priv(indio_dev);
 479         int64_t time_ns = iio_get_time_ns();
 480         int bit, ret, i = 0;
 481
 482         mutex_lock(&data->mutex);
 483
 484         for_each_set_bit(bit, indio_dev->buffer->scan_mask,
 485                          indio_dev->masklength) {
 486                 ret = bma180_get_acc_reg(data, bit);
 487                 if (ret < 0) {
 488                         mutex_unlock(&data->mutex);
 489                         goto err;
 490                 }
 491                 ((s16 *)data->buff)[i++] = ret;
 492         }
 493         mutex_unlock(&data->mutex);
 494
 495         iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
 496 err:
 497         iio_trigger_notify_done(indio_dev->trig);
 498
 499         return IRQ_HANDLED;
 500 }
 501
 502 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
 503                 bool state)
 504 {
 505         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 506         struct bma180_data *data = iio_priv(indio_dev);
 507
 508         return bma180_set_new_data_intr_state(data, state);
 509 }
 510
 511 static int bma180_trig_try_reen(struct iio_trigger *trig)
 512 {
 513         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 514         struct bma180_data *data = iio_priv(indio_dev);
 515
 516         return bma180_reset_intr(data);
 517 }
 518
 519 static const struct iio_trigger_ops bma180_trigger_ops = {
 520         .set_trigger_state = bma180_data_rdy_trigger_set_state,
 521         .try_reenable = bma180_trig_try_reen,
 522         .owner = THIS_MODULE,
 523 };
 524
 525 static int bma180_probe(struct i2c_client *client,
 526                 const struct i2c_device_id *id)
 527 {
 528         struct bma180_data *data;
 529         struct iio_dev *indio_dev;
 530         struct iio_trigger *trig;
 531         int ret;
 532
 533         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 534         if (!indio_dev)
 535                 return -ENOMEM;
 536
 537         data = iio_priv(indio_dev);
 538         i2c_set_clientdata(client, indio_dev);
 539         data->client = client;
 540
 541         ret = bma180_chip_init(data);
 542         if (ret < 0)
 543                 goto err_chip_disable;
 544
 545         mutex_init(&data->mutex);
 546
 547         indio_dev->dev.parent = &client->dev;
 548         indio_dev->channels = bma180_channels;
 549         indio_dev->num_channels = ARRAY_SIZE(bma180_channels);
 550         indio_dev->name = BMA180_DRV_NAME;
 551         indio_dev->modes = INDIO_DIRECT_MODE;
 552         indio_dev->info = &bma180_info;
 553
 554         trig = iio_trigger_alloc("%s-dev%d", indio_dev->name, indio_dev->id);
 555         if (!trig) {
 556                 ret = -ENOMEM;
 557                 goto err_chip_disable;
 558         }
 559
 560         ret = devm_request_irq(&client->dev, client->irq,
 561                         iio_trigger_generic_data_rdy_poll,
 562                         IRQF_TRIGGER_RISING, BMA180_IRQ_NAME, trig);
 563         if (ret) {
 564                 dev_err(&client->dev, "unable to request IRQ\n");
 565                 goto err_trigger_free;
 566         }
 567
 568         trig->dev.parent = &client->dev;
 569         trig->ops = &bma180_trigger_ops;
 570         iio_trigger_set_drvdata(trig, indio_dev);
 571         data->trig = trig;
 572         indio_dev->trig = trig;
 573
 574         ret = iio_trigger_register(trig);
 575         if (ret)
 576                 goto err_trigger_free;
 577
 578         ret = iio_triggered_buffer_setup(indio_dev, NULL,
 579                         bma180_trigger_handler, NULL);
 580         if (ret < 0) {
 581                 dev_err(&client->dev, "unable to setup iio triggered buffer\n");
 582                 goto err_trigger_unregister;
 583         }
 584
 585         ret = iio_device_register(indio_dev);
 586         if (ret < 0) {
 587                 dev_err(&client->dev, "unable to register iio device\n");
 588                 goto err_buffer_cleanup;
 589         }
 590
 591         return 0;
 592
 593 err_buffer_cleanup:
 594         iio_triggered_buffer_cleanup(indio_dev);
 595 err_trigger_unregister:
 596         iio_trigger_unregister(trig);
 597 err_trigger_free:
 598         iio_trigger_free(trig);
 599 err_chip_disable:
 600         bma180_chip_disable(data);
 601
 602         return ret;
 603 }
 604
 605 static int bma180_remove(struct i2c_client *client)
 606 {
 607         struct iio_dev *indio_dev = i2c_get_clientdata(client);
 608         struct bma180_data *data = iio_priv(indio_dev);
 609
 610         iio_device_unregister(indio_dev);
 611         iio_triggered_buffer_cleanup(indio_dev);
 612         iio_trigger_unregister(data->trig);
 613         iio_trigger_free(data->trig);
 614
 615         mutex_lock(&data->mutex);
 616         bma180_chip_disable(data);
 617         mutex_unlock(&data->mutex);
 618
 619         return 0;
 620 }
 621
 622 #ifdef CONFIG_PM_SLEEP
 623 static int bma180_suspend(struct device *dev)
 624 {
 625         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 626         struct bma180_data *data = iio_priv(indio_dev);
 627         int ret;
 628
 629         mutex_lock(&data->mutex);
 630         ret = bma180_set_sleep_state(data, 1);
 631         mutex_unlock(&data->mutex);
 632
 633         return ret;
 634 }
 635
 636 static int bma180_resume(struct device *dev)
 637 {
 638         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 639         struct bma180_data *data = iio_priv(indio_dev);
 640         int ret;
 641
 642         mutex_lock(&data->mutex);
 643         ret = bma180_set_sleep_state(data, 0);
 644         mutex_unlock(&data->mutex);
 645
 646         return ret;
 647 }
 648
 649 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
 650 #define BMA180_PM_OPS (&bma180_pm_ops)
 651 #else
 652 #define BMA180_PM_OPS NULL
 653 #endif
 654
 655 static struct i2c_device_id bma180_id[] = {
 656         { BMA180_DRV_NAME, 0 },
 657         { }
 658 };
 659
 660 MODULE_DEVICE_TABLE(i2c, bma180_id);
 661
 662 static struct i2c_driver bma180_driver = {
 663         .driver = {
 664                 .name   = BMA180_DRV_NAME,
 665                 .owner  = THIS_MODULE,
 666                 .pm     = BMA180_PM_OPS,
 667         },
 668         .probe          = bma180_probe,
 669         .remove         = bma180_remove,
 670         .id_table       = bma180_id,
 671 };
 672
 673 module_i2c_driver(bma180_driver);
 674
 675 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
 676 MODULE_AUTHOR("Texas Instruments, Inc.");
 677 MODULE_DESCRIPTION("Bosch BMA180 triaxial acceleration sensor");
 678 MODULE_LICENSE("GPL");