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 BMA180_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        2452
  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         "0.001275 0.001863 0.002452 0.003727 0.004903 0.009709 0.019417"
  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 bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
  97 static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
  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 register\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(bma180_bw_table); ++i) {
 189                 if (bma180_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(bma180_scale_table); ++i)
 213                 if (bma180_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 != BMA180_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                 if (val2)
 380                         return -EINVAL;
 381                 mutex_lock(&data->mutex);
 382                 ret = bma180_set_bw(data, val);
 383                 mutex_unlock(&data->mutex);
 384                 return ret;
 385         default:
 386                 return -EINVAL;
 387         }
 388 }
 389
 390 static int bma180_update_scan_mode(struct iio_dev *indio_dev,
 391                 const unsigned long *scan_mask)
 392 {
 393         struct bma180_data *data = iio_priv(indio_dev);
 394
 395         if (data->buff)
 396                 devm_kfree(&indio_dev->dev, data->buff);
 397         data->buff = devm_kzalloc(&indio_dev->dev,
 398                         indio_dev->scan_bytes, GFP_KERNEL);
 399         if (!data->buff)
 400                 return -ENOMEM;
 401
 402         return 0;
 403 }
 404
 405 static const struct iio_info bma180_info = {
 406         .attrs                  = &bma180_attrs_group,
 407         .read_raw               = bma180_read_raw,
 408         .write_raw              = bma180_write_raw,
 409         .update_scan_mode       = bma180_update_scan_mode,
 410         .driver_module          = THIS_MODULE,
 411 };
 412
 413 static const char * const bma180_power_modes[] = {
 414         BMA180_LOW_NOISE_STR,
 415         BMA180_LOW_POWER_STR,
 416 };
 417
 418 static int bma180_get_power_mode(struct iio_dev *indio_dev,
 419                 const struct iio_chan_spec *chan)
 420 {
 421         struct bma180_data *data = iio_priv(indio_dev);
 422
 423         return data->pmode;
 424 }
 425
 426 static int bma180_set_power_mode(struct iio_dev *indio_dev,
 427                 const struct iio_chan_spec *chan, unsigned int mode)
 428 {
 429         struct bma180_data *data = iio_priv(indio_dev);
 430         int ret;
 431
 432         mutex_lock(&data->mutex);
 433         ret = bma180_set_pmode(data, mode);
 434         mutex_unlock(&data->mutex);
 435
 436         return ret;
 437 }
 438
 439 static const struct iio_enum bma180_power_mode_enum = {
 440         .items = bma180_power_modes,
 441         .num_items = ARRAY_SIZE(bma180_power_modes),
 442         .get = bma180_get_power_mode,
 443         .set = bma180_set_power_mode,
 444 };
 445
 446 static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
 447         IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
 448         IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
 449         { },
 450 };
 451
 452 #define BMA180_CHANNEL(_axis) {                                 \
 453         .type = IIO_ACCEL,                                              \
 454         .modified = 1,                                                  \
 455         .channel2 = IIO_MOD_##_axis,                                    \
 456         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),                   \
 457         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |          \
 458                 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),       \
 459         .scan_index = AXIS_##_axis,                                     \
 460         .scan_type = {                                                  \
 461                 .sign = 's',                                            \
 462                 .realbits = 14,                                         \
 463                 .storagebits = 16,                                      \
 464                 .shift = 2,                                             \
 465         },                                                              \
 466         .ext_info = bma180_ext_info,                                    \
 467 }
 468
 469 static const struct iio_chan_spec bma180_channels[] = {
 470         BMA180_CHANNEL(X),
 471         BMA180_CHANNEL(Y),
 472         BMA180_CHANNEL(Z),
 473         IIO_CHAN_SOFT_TIMESTAMP(3),
 474 };
 475
 476 static irqreturn_t bma180_trigger_handler(int irq, void *p)
 477 {
 478         struct iio_poll_func *pf = p;
 479         struct iio_dev *indio_dev = pf->indio_dev;
 480         struct bma180_data *data = iio_priv(indio_dev);
 481         int64_t time_ns = iio_get_time_ns();
 482         int bit, ret, i = 0;
 483
 484         mutex_lock(&data->mutex);
 485
 486         for_each_set_bit(bit, indio_dev->buffer->scan_mask,
 487                          indio_dev->masklength) {
 488                 ret = bma180_get_acc_reg(data, bit);
 489                 if (ret < 0) {
 490                         mutex_unlock(&data->mutex);
 491                         goto err;
 492                 }
 493                 ((s16 *)data->buff)[i++] = ret;
 494         }
 495         mutex_unlock(&data->mutex);
 496
 497         iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
 498 err:
 499         iio_trigger_notify_done(indio_dev->trig);
 500
 501         return IRQ_HANDLED;
 502 }
 503
 504 static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
 505                 bool state)
 506 {
 507         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 508         struct bma180_data *data = iio_priv(indio_dev);
 509
 510         return bma180_set_new_data_intr_state(data, state);
 511 }
 512
 513 static int bma180_trig_try_reen(struct iio_trigger *trig)
 514 {
 515         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 516         struct bma180_data *data = iio_priv(indio_dev);
 517
 518         return bma180_reset_intr(data);
 519 }
 520
 521 static const struct iio_trigger_ops bma180_trigger_ops = {
 522         .set_trigger_state = bma180_data_rdy_trigger_set_state,
 523         .try_reenable = bma180_trig_try_reen,
 524         .owner = THIS_MODULE,
 525 };
 526
 527 static int bma180_probe(struct i2c_client *client,
 528                 const struct i2c_device_id *id)
 529 {
 530         struct bma180_data *data;
 531         struct iio_dev *indio_dev;
 532         int ret;
 533
 534         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 535         if (!indio_dev)
 536                 return -ENOMEM;
 537
 538         data = iio_priv(indio_dev);
 539         i2c_set_clientdata(client, indio_dev);
 540         data->client = client;
 541
 542         ret = bma180_chip_init(data);
 543         if (ret < 0)
 544                 goto err_chip_disable;
 545
 546         mutex_init(&data->mutex);
 547
 548         indio_dev->dev.parent = &client->dev;
 549         indio_dev->channels = bma180_channels;
 550         indio_dev->num_channels = ARRAY_SIZE(bma180_channels);
 551         indio_dev->name = BMA180_DRV_NAME;
 552         indio_dev->modes = INDIO_DIRECT_MODE;
 553         indio_dev->info = &bma180_info;
 554
 555         if (client->irq > 0) {
 556                 data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
 557                         indio_dev->id);
 558                 if (!data->trig) {
 559                         ret = -ENOMEM;
 560                         goto err_chip_disable;
 561                 }
 562
 563                 ret = devm_request_irq(&client->dev, client->irq,
 564                         iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
 565                         BMA180_IRQ_NAME, data->trig);
 566                 if (ret) {
 567                         dev_err(&client->dev, "unable to request IRQ\n");
 568                         goto err_trigger_free;
 569                 }
 570
 571                 data->trig->dev.parent = &client->dev;
 572                 data->trig->ops = &bma180_trigger_ops;
 573                 iio_trigger_set_drvdata(data->trig, indio_dev);
 574                 indio_dev->trig = data->trig;
 575
 576                 ret = iio_trigger_register(data->trig);
 577                 if (ret)
 578                         goto err_trigger_free;
 579         }
 580
 581         ret = iio_triggered_buffer_setup(indio_dev, NULL,
 582                         bma180_trigger_handler, NULL);
 583         if (ret < 0) {
 584                 dev_err(&client->dev, "unable to setup iio triggered buffer\n");
 585                 goto err_trigger_unregister;
 586         }
 587
 588         ret = iio_device_register(indio_dev);
 589         if (ret < 0) {
 590                 dev_err(&client->dev, "unable to register iio device\n");
 591                 goto err_buffer_cleanup;
 592         }
 593
 594         return 0;
 595
 596 err_buffer_cleanup:
 597         iio_triggered_buffer_cleanup(indio_dev);
 598 err_trigger_unregister:
 599         if (data->trig)
 600                 iio_trigger_unregister(data->trig);
 601 err_trigger_free:
 602         iio_trigger_free(data->trig);
 603 err_chip_disable:
 604         bma180_chip_disable(data);
 605
 606         return ret;
 607 }
 608
 609 static int bma180_remove(struct i2c_client *client)
 610 {
 611         struct iio_dev *indio_dev = i2c_get_clientdata(client);
 612         struct bma180_data *data = iio_priv(indio_dev);
 613
 614         iio_device_unregister(indio_dev);
 615         iio_triggered_buffer_cleanup(indio_dev);
 616         if (data->trig) {
 617                 iio_trigger_unregister(data->trig);
 618                 iio_trigger_free(data->trig);
 619         }
 620
 621         mutex_lock(&data->mutex);
 622         bma180_chip_disable(data);
 623         mutex_unlock(&data->mutex);
 624
 625         return 0;
 626 }
 627
 628 #ifdef CONFIG_PM_SLEEP
 629 static int bma180_suspend(struct device *dev)
 630 {
 631         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 632         struct bma180_data *data = iio_priv(indio_dev);
 633         int ret;
 634
 635         mutex_lock(&data->mutex);
 636         ret = bma180_set_sleep_state(data, 1);
 637         mutex_unlock(&data->mutex);
 638
 639         return ret;
 640 }
 641
 642 static int bma180_resume(struct device *dev)
 643 {
 644         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
 645         struct bma180_data *data = iio_priv(indio_dev);
 646         int ret;
 647
 648         mutex_lock(&data->mutex);
 649         ret = bma180_set_sleep_state(data, 0);
 650         mutex_unlock(&data->mutex);
 651
 652         return ret;
 653 }
 654
 655 static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
 656 #define BMA180_PM_OPS (&bma180_pm_ops)
 657 #else
 658 #define BMA180_PM_OPS NULL
 659 #endif
 660
 661 static struct i2c_device_id bma180_id[] = {
 662         { BMA180_DRV_NAME, 0 },
 663         { }
 664 };
 665
 666 MODULE_DEVICE_TABLE(i2c, bma180_id);
 667
 668 static struct i2c_driver bma180_driver = {
 669         .driver = {
 670                 .name   = BMA180_DRV_NAME,
 671                 .owner  = THIS_MODULE,
 672                 .pm     = BMA180_PM_OPS,
 673         },
 674         .probe          = bma180_probe,
 675         .remove         = bma180_remove,
 676         .id_table       = bma180_id,
 677 };
 678
 679 module_i2c_driver(bma180_driver);
 680
 681 MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
 682 MODULE_AUTHOR("Texas Instruments, Inc.");
 683 MODULE_DESCRIPTION("Bosch BMA180 triaxial acceleration sensor");
 684 MODULE_LICENSE("GPL");