drivers/staging/iio/accel/adis16240_core.c

   1 /*
   2  * ADIS16240 Programmable Impact Sensor and Recorder driver
   3  *
   4  * Copyright 2010 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <linux/interrupt.h>
  10 #include <linux/irq.h>
  11 #include <linux/gpio.h>
  12 #include <linux/delay.h>
  13 #include <linux/mutex.h>
  14 #include <linux/device.h>
  15 #include <linux/kernel.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/slab.h>
  18 #include <linux/sysfs.h>
  19 #include <linux/list.h>
  20 #include <linux/module.h>
  21
  22 #include <linux/iio/iio.h>
  23 #include <linux/iio/sysfs.h>
  24 #include <linux/iio/buffer.h>
  25
  26 #include "adis16240.h"
  27
  28 #define DRIVER_NAME             "adis16240"
  29
  30 static int adis16240_check_status(struct iio_dev *indio_dev);
  31
  32 /**
  33  * adis16240_spi_write_reg_8() - write single byte to a register
  34  * @indio_dev: iio_dev associated with device
  35  * @reg_address: the address of the register to be written
  36  * @val: the value to write
  37  **/
  38 static int adis16240_spi_write_reg_8(struct iio_dev *indio_dev,
  39                                      u8 reg_address,
  40                                      u8 val)
  41 {
  42         int ret;
  43         struct adis16240_state *st = iio_priv(indio_dev);
  44
  45         mutex_lock(&st->buf_lock);
  46         st->tx[0] = ADIS16240_WRITE_REG(reg_address);
  47         st->tx[1] = val;
  48
  49         ret = spi_write(st->us, st->tx, 2);
  50         mutex_unlock(&st->buf_lock);
  51
  52         return ret;
  53 }
  54
  55 /**
  56  * adis16240_spi_write_reg_16() - write 2 bytes to a pair of registers
  57  * @indio_dev: iio_dev for this device
  58  * @reg_address: the address of the lower of the two registers. Second register
  59  *               is assumed to have address one greater.
  60  * @val: value to be written
  61  **/
  62 static int adis16240_spi_write_reg_16(struct iio_dev *indio_dev,
  63                                       u8 lower_reg_address,
  64                                       u16 value)
  65 {
  66         int ret;
  67         struct spi_message msg;
  68         struct adis16240_state *st = iio_priv(indio_dev);
  69         struct spi_transfer xfers[] = {
  70                 {
  71                         .tx_buf = st->tx,
  72                         .bits_per_word = 8,
  73                         .len = 2,
  74                         .cs_change = 1,
  75                         .delay_usecs = 35,
  76                 }, {
  77                         .tx_buf = st->tx + 2,
  78                         .bits_per_word = 8,
  79                         .len = 2,
  80                         .delay_usecs = 35,
  81                 },
  82         };
  83
  84         mutex_lock(&st->buf_lock);
  85         st->tx[0] = ADIS16240_WRITE_REG(lower_reg_address);
  86         st->tx[1] = value & 0xFF;
  87         st->tx[2] = ADIS16240_WRITE_REG(lower_reg_address + 1);
  88         st->tx[3] = (value >> 8) & 0xFF;
  89
  90         spi_message_init(&msg);
  91         spi_message_add_tail(&xfers[0], &msg);
  92         spi_message_add_tail(&xfers[1], &msg);
  93         ret = spi_sync(st->us, &msg);
  94         mutex_unlock(&st->buf_lock);
  95
  96         return ret;
  97 }
  98
  99 /**
 100  * adis16240_spi_read_reg_16() - read 2 bytes from a 16-bit register
 101  * @indio_dev: iio_dev for this device
 102  * @reg_address: the address of the lower of the two registers. Second register
 103  *               is assumed to have address one greater.
 104  * @val: somewhere to pass back the value read
 105  **/
 106 static int adis16240_spi_read_reg_16(struct iio_dev *indio_dev,
 107                 u8 lower_reg_address,
 108                 u16 *val)
 109 {
 110         struct spi_message msg;
 111         struct adis16240_state *st = iio_priv(indio_dev);
 112         int ret;
 113         struct spi_transfer xfers[] = {
 114                 {
 115                         .tx_buf = st->tx,
 116                         .bits_per_word = 8,
 117                         .len = 2,
 118                         .cs_change = 1,
 119                         .delay_usecs = 35,
 120                 }, {
 121                         .rx_buf = st->rx,
 122                         .bits_per_word = 8,
 123                         .len = 2,
 124                         .cs_change = 1,
 125                         .delay_usecs = 35,
 126                 },
 127         };
 128
 129         mutex_lock(&st->buf_lock);
 130         st->tx[0] = ADIS16240_READ_REG(lower_reg_address);
 131         st->tx[1] = 0;
 132         st->tx[2] = 0;
 133         st->tx[3] = 0;
 134
 135         spi_message_init(&msg);
 136         spi_message_add_tail(&xfers[0], &msg);
 137         spi_message_add_tail(&xfers[1], &msg);
 138         ret = spi_sync(st->us, &msg);
 139         if (ret) {
 140                 dev_err(&st->us->dev,
 141                         "problem when reading 16 bit register 0x%02X",
 142                         lower_reg_address);
 143                 goto error_ret;
 144         }
 145         *val = (st->rx[0] << 8) | st->rx[1];
 146
 147 error_ret:
 148         mutex_unlock(&st->buf_lock);
 149         return ret;
 150 }
 151
 152 static ssize_t adis16240_spi_read_signed(struct device *dev,
 153                 struct device_attribute *attr,
 154                 char *buf,
 155                 unsigned bits)
 156 {
 157         struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 158         int ret;
 159         s16 val = 0;
 160         unsigned shift = 16 - bits;
 161         struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 162
 163         ret = adis16240_spi_read_reg_16(indio_dev,
 164                                         this_attr->address, (u16 *)&val);
 165         if (ret)
 166                 return ret;
 167
 168         if (val & ADIS16240_ERROR_ACTIVE)
 169                 adis16240_check_status(indio_dev);
 170
 171         val = ((s16)(val << shift) >> shift);
 172         return sprintf(buf, "%d\n", val);
 173 }
 174
 175 static ssize_t adis16240_read_12bit_signed(struct device *dev,
 176                 struct device_attribute *attr,
 177                 char *buf)
 178 {
 179         ssize_t ret;
 180         struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 181
 182         /* Take the iio_dev status lock */
 183         mutex_lock(&indio_dev->mlock);
 184         ret =  adis16240_spi_read_signed(dev, attr, buf, 12);
 185         mutex_unlock(&indio_dev->mlock);
 186
 187         return ret;
 188 }
 189
 190 static int adis16240_reset(struct iio_dev *indio_dev)
 191 {
 192         int ret;
 193         ret = adis16240_spi_write_reg_8(indio_dev,
 194                         ADIS16240_GLOB_CMD,
 195                         ADIS16240_GLOB_CMD_SW_RESET);
 196         if (ret)
 197                 dev_err(&indio_dev->dev, "problem resetting device");
 198
 199         return ret;
 200 }
 201
 202 int adis16240_set_irq(struct iio_dev *indio_dev, bool enable)
 203 {
 204         int ret = 0;
 205         u16 msc;
 206
 207         ret = adis16240_spi_read_reg_16(indio_dev,
 208                                         ADIS16240_MSC_CTRL, &msc);
 209         if (ret)
 210                 goto error_ret;
 211
 212         msc |= ADIS16240_MSC_CTRL_ACTIVE_HIGH;
 213         msc &= ~ADIS16240_MSC_CTRL_DATA_RDY_DIO2;
 214         if (enable)
 215                 msc |= ADIS16240_MSC_CTRL_DATA_RDY_EN;
 216         else
 217                 msc &= ~ADIS16240_MSC_CTRL_DATA_RDY_EN;
 218
 219         ret = adis16240_spi_write_reg_16(indio_dev,
 220                                          ADIS16240_MSC_CTRL, msc);
 221
 222 error_ret:
 223         return ret;
 224 }
 225
 226 static int adis16240_self_test(struct iio_dev *indio_dev)
 227 {
 228         int ret;
 229         ret = adis16240_spi_write_reg_16(indio_dev,
 230                         ADIS16240_MSC_CTRL,
 231                         ADIS16240_MSC_CTRL_SELF_TEST_EN);
 232         if (ret) {
 233                 dev_err(&indio_dev->dev, "problem starting self test");
 234                 goto err_ret;
 235         }
 236
 237         msleep(ADIS16240_STARTUP_DELAY);
 238
 239         adis16240_check_status(indio_dev);
 240
 241 err_ret:
 242         return ret;
 243 }
 244
 245 static int adis16240_check_status(struct iio_dev *indio_dev)
 246 {
 247         u16 status;
 248         int ret;
 249         struct device *dev = &indio_dev->dev;
 250
 251         ret = adis16240_spi_read_reg_16(indio_dev,
 252                                         ADIS16240_DIAG_STAT, &status);
 253
 254         if (ret < 0) {
 255                 dev_err(dev, "Reading status failed\n");
 256                 goto error_ret;
 257         }
 258
 259         ret = status & 0x2F;
 260         if (status & ADIS16240_DIAG_STAT_PWRON_FAIL)
 261                 dev_err(dev, "Power-on, self-test fail\n");
 262         if (status & ADIS16240_DIAG_STAT_SPI_FAIL)
 263                 dev_err(dev, "SPI failure\n");
 264         if (status & ADIS16240_DIAG_STAT_FLASH_UPT)
 265                 dev_err(dev, "Flash update failed\n");
 266         if (status & ADIS16240_DIAG_STAT_POWER_HIGH)
 267                 dev_err(dev, "Power supply above 3.625V\n");
 268         if (status & ADIS16240_DIAG_STAT_POWER_LOW)
 269                 dev_err(dev, "Power supply below 2.225V\n");
 270
 271 error_ret:
 272         return ret;
 273 }
 274
 275 static int adis16240_initial_setup(struct iio_dev *indio_dev)
 276 {
 277         int ret;
 278         struct device *dev = &indio_dev->dev;
 279
 280         /* Disable IRQ */
 281         ret = adis16240_set_irq(indio_dev, false);
 282         if (ret) {
 283                 dev_err(dev, "disable irq failed");
 284                 goto err_ret;
 285         }
 286
 287         /* Do self test */
 288         ret = adis16240_self_test(indio_dev);
 289         if (ret) {
 290                 dev_err(dev, "self test failure");
 291                 goto err_ret;
 292         }
 293
 294         /* Read status register to check the result */
 295         ret = adis16240_check_status(indio_dev);
 296         if (ret) {
 297                 adis16240_reset(indio_dev);
 298                 dev_err(dev, "device not playing ball -> reset");
 299                 msleep(ADIS16240_STARTUP_DELAY);
 300                 ret = adis16240_check_status(indio_dev);
 301                 if (ret) {
 302                         dev_err(dev, "giving up");
 303                         goto err_ret;
 304                 }
 305         }
 306
 307 err_ret:
 308         return ret;
 309 }
 310
 311 static IIO_DEVICE_ATTR(in_accel_xyz_squared_peak_raw, S_IRUGO,
 312                        adis16240_read_12bit_signed, NULL,
 313                        ADIS16240_XYZPEAK_OUT);
 314
 315 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("4096");
 316
 317 enum adis16240_chan {
 318         in_supply,
 319         in_aux,
 320         accel_x,
 321         accel_y,
 322         accel_z,
 323         temp,
 324 };
 325
 326 static const u8 adis16240_addresses[6][3] = {
 327         [in_supply] = { ADIS16240_SUPPLY_OUT },
 328         [in_aux] = { ADIS16240_AUX_ADC },
 329         [accel_x] = { ADIS16240_XACCL_OUT, ADIS16240_XACCL_OFF,
 330                       ADIS16240_XPEAK_OUT },
 331         [accel_y] = { ADIS16240_YACCL_OUT, ADIS16240_YACCL_OFF,
 332                       ADIS16240_YPEAK_OUT },
 333         [accel_z] = { ADIS16240_ZACCL_OUT, ADIS16240_ZACCL_OFF,
 334                       ADIS16240_ZPEAK_OUT },
 335         [temp] = { ADIS16240_TEMP_OUT },
 336 };
 337
 338 static int adis16240_read_raw(struct iio_dev *indio_dev,
 339                               struct iio_chan_spec const *chan,
 340                               int *val, int *val2,
 341                               long mask)
 342 {
 343         int ret;
 344         int bits;
 345         u8 addr;
 346         s16 val16;
 347
 348         switch (mask) {
 349         case IIO_CHAN_INFO_RAW:
 350                 mutex_lock(&indio_dev->mlock);
 351                 addr = adis16240_addresses[chan->address][0];
 352                 ret = adis16240_spi_read_reg_16(indio_dev, addr, &val16);
 353                 if (ret) {
 354                         mutex_unlock(&indio_dev->mlock);
 355                         return ret;
 356                 }
 357
 358                 if (val16 & ADIS16240_ERROR_ACTIVE) {
 359                         ret = adis16240_check_status(indio_dev);
 360                         if (ret) {
 361                                 mutex_unlock(&indio_dev->mlock);
 362                                 return ret;
 363                         }
 364                 }
 365                 val16 = val16 & ((1 << chan->scan_type.realbits) - 1);
 366                 if (chan->scan_type.sign == 's')
 367                         val16 = (s16)(val16 <<
 368                                       (16 - chan->scan_type.realbits)) >>
 369                                 (16 - chan->scan_type.realbits);
 370                 *val = val16;
 371                 mutex_unlock(&indio_dev->mlock);
 372                 return IIO_VAL_INT;
 373         case IIO_CHAN_INFO_SCALE:
 374                 switch (chan->type) {
 375                 case IIO_VOLTAGE:
 376                         *val = 0;
 377                         if (chan->channel == 0)
 378                                 *val2 = 4880;
 379                         else
 380                                 return -EINVAL;
 381                         return IIO_VAL_INT_PLUS_MICRO;
 382                 case IIO_TEMP:
 383                         *val = 0;
 384                         *val2 = 244000;
 385                         return IIO_VAL_INT_PLUS_MICRO;
 386                 case IIO_ACCEL:
 387                         *val = 0;
 388                         *val2 = 504062;
 389                         return IIO_VAL_INT_PLUS_MICRO;
 390                 default:
 391                         return -EINVAL;
 392                 }
 393                 break;
 394         case IIO_CHAN_INFO_PEAK_SCALE:
 395                 *val = 6;
 396                 *val2 = 629295;
 397                 return IIO_VAL_INT_PLUS_MICRO;
 398         case IIO_CHAN_INFO_OFFSET:
 399                 *val = 25;
 400                 return IIO_VAL_INT;
 401         case IIO_CHAN_INFO_CALIBBIAS:
 402                 bits = 10;
 403                 mutex_lock(&indio_dev->mlock);
 404                 addr = adis16240_addresses[chan->address][1];
 405                 ret = adis16240_spi_read_reg_16(indio_dev, addr, &val16);
 406                 if (ret) {
 407                         mutex_unlock(&indio_dev->mlock);
 408                         return ret;
 409                 }
 410                 val16 &= (1 << bits) - 1;
 411                 val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
 412                 *val = val16;
 413                 mutex_unlock(&indio_dev->mlock);
 414                 return IIO_VAL_INT;
 415         case IIO_CHAN_INFO_PEAK:
 416                 bits = 10;
 417                 mutex_lock(&indio_dev->mlock);
 418                 addr = adis16240_addresses[chan->address][2];
 419                 ret = adis16240_spi_read_reg_16(indio_dev, addr, &val16);
 420                 if (ret) {
 421                         mutex_unlock(&indio_dev->mlock);
 422                         return ret;
 423                 }
 424                 val16 &= (1 << bits) - 1;
 425                 val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
 426                 *val = val16;
 427                 mutex_unlock(&indio_dev->mlock);
 428                 return IIO_VAL_INT;
 429         }
 430         return -EINVAL;
 431 }
 432
 433 static int adis16240_write_raw(struct iio_dev *indio_dev,
 434                                struct iio_chan_spec const *chan,
 435                                int val,
 436                                int val2,
 437                                long mask)
 438 {
 439         int bits = 10;
 440         s16 val16;
 441         u8 addr;
 442         switch (mask) {
 443         case IIO_CHAN_INFO_CALIBBIAS:
 444                 val16 = val & ((1 << bits) - 1);
 445                 addr = adis16240_addresses[chan->address][1];
 446                 return adis16240_spi_write_reg_16(indio_dev, addr, val16);
 447         }
 448         return -EINVAL;
 449 }
 450
 451 static struct iio_chan_spec adis16240_channels[] = {
 452         {
 453                 .type = IIO_VOLTAGE,
 454                 .indexed = 1,
 455                 .channel = 0,
 456                 .extend_name = "supply",
 457                 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
 458                 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 459                 .address = in_supply,
 460                 .scan_index = ADIS16240_SCAN_SUPPLY,
 461                 .scan_type = {
 462                         .sign = 'u',
 463                         .realbits = 10,
 464                         .storagebits = 16,
 465                 },
 466         }, {
 467                 .type = IIO_VOLTAGE,
 468                 .indexed = 1,
 469                 .channel = 1,
 470                 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
 471                 .address = in_aux,
 472                 .scan_index = ADIS16240_SCAN_AUX_ADC,
 473                 .scan_type = {
 474                         .sign = 'u',
 475                         .realbits = 10,
 476                         .storagebits = 16,
 477                 },
 478         }, {
 479                 .type = IIO_ACCEL,
 480                 .modified = 1,
 481                 .channel2 = IIO_MOD_X,
 482                 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
 483                 IIO_CHAN_INFO_SCALE_SHARED_BIT |
 484                 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
 485                 IIO_CHAN_INFO_PEAK_SEPARATE_BIT,
 486                 .address = accel_x,
 487                 .scan_index = ADIS16240_SCAN_ACC_X,
 488                 .scan_type = {
 489                         .sign = 's',
 490                         .realbits = 10,
 491                         .storagebits = 16,
 492                 },
 493         }, {
 494                 .type = IIO_ACCEL,
 495                 .modified = 1,
 496                 .channel2 = IIO_MOD_Y,
 497                 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
 498                 IIO_CHAN_INFO_SCALE_SHARED_BIT |
 499                 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
 500                 IIO_CHAN_INFO_PEAK_SEPARATE_BIT,
 501                 .address = accel_y,
 502                 .scan_index = ADIS16240_SCAN_ACC_Y,
 503                 .scan_type = {
 504                         .sign = 's',
 505                         .realbits = 10,
 506                         .storagebits = 16,
 507                 },
 508         }, {
 509                 .type = IIO_ACCEL,
 510                 .modified = 1,
 511                 .channel2 = IIO_MOD_Z,
 512                 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
 513                 IIO_CHAN_INFO_SCALE_SHARED_BIT |
 514                 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
 515                 IIO_CHAN_INFO_PEAK_SEPARATE_BIT,
 516                 .address = accel_z,
 517                 .scan_index = ADIS16240_SCAN_ACC_Z,
 518                 .scan_type = {
 519                         .sign = 's',
 520                         .realbits = 10,
 521                         .storagebits = 16,
 522                 },
 523         }, {
 524                 .type = IIO_TEMP,
 525                 .indexed = 1,
 526                 .channel = 0,
 527                 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
 528                 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 529                 .address = temp,
 530                 .scan_index = ADIS16240_SCAN_TEMP,
 531                 .scan_type = {
 532                         .sign = 'u',
 533                         .realbits = 10,
 534                         .storagebits = 16,
 535                 },
 536         },
 537         IIO_CHAN_SOFT_TIMESTAMP(6)
 538 };
 539
 540 static struct attribute *adis16240_attributes[] = {
 541         &iio_dev_attr_in_accel_xyz_squared_peak_raw.dev_attr.attr,
 542         &iio_const_attr_sampling_frequency_available.dev_attr.attr,
 543         NULL
 544 };
 545
 546 static const struct attribute_group adis16240_attribute_group = {
 547         .attrs = adis16240_attributes,
 548 };
 549
 550 static const struct iio_info adis16240_info = {
 551         .attrs = &adis16240_attribute_group,
 552         .read_raw = &adis16240_read_raw,
 553         .write_raw = &adis16240_write_raw,
 554         .driver_module = THIS_MODULE,
 555 };
 556
 557 static int __devinit adis16240_probe(struct spi_device *spi)
 558 {
 559         int ret;
 560         struct adis16240_state *st;
 561         struct iio_dev *indio_dev;
 562
 563         /* setup the industrialio driver allocated elements */
 564         indio_dev = iio_device_alloc(sizeof(*st));
 565         if (indio_dev == NULL) {
 566                 ret = -ENOMEM;
 567                 goto error_ret;
 568         }
 569         st = iio_priv(indio_dev);
 570         /* this is only used for removal purposes */
 571         spi_set_drvdata(spi, indio_dev);
 572
 573         st->us = spi;
 574         mutex_init(&st->buf_lock);
 575
 576         indio_dev->name = spi->dev.driver->name;
 577         indio_dev->dev.parent = &spi->dev;
 578         indio_dev->info = &adis16240_info;
 579         indio_dev->channels = adis16240_channels;
 580         indio_dev->num_channels = ARRAY_SIZE(adis16240_channels);
 581         indio_dev->modes = INDIO_DIRECT_MODE;
 582
 583         ret = adis16240_configure_ring(indio_dev);
 584         if (ret)
 585                 goto error_free_dev;
 586
 587         ret = iio_buffer_register(indio_dev,
 588                                   adis16240_channels,
 589                                   ARRAY_SIZE(adis16240_channels));
 590         if (ret) {
 591                 printk(KERN_ERR "failed to initialize the ring\n");
 592                 goto error_unreg_ring_funcs;
 593         }
 594
 595         if (spi->irq) {
 596                 ret = adis16240_probe_trigger(indio_dev);
 597                 if (ret)
 598                         goto error_uninitialize_ring;
 599         }
 600
 601         /* Get the device into a sane initial state */
 602         ret = adis16240_initial_setup(indio_dev);
 603         if (ret)
 604                 goto error_remove_trigger;
 605         ret = iio_device_register(indio_dev);
 606         if (ret)
 607                 goto error_remove_trigger;
 608         return 0;
 609
 610 error_remove_trigger:
 611         adis16240_remove_trigger(indio_dev);
 612 error_uninitialize_ring:
 613         iio_buffer_unregister(indio_dev);
 614 error_unreg_ring_funcs:
 615         adis16240_unconfigure_ring(indio_dev);
 616 error_free_dev:
 617         iio_device_free(indio_dev);
 618 error_ret:
 619         return ret;
 620 }
 621
 622 static int adis16240_remove(struct spi_device *spi)
 623 {
 624
 625         struct iio_dev *indio_dev = spi_get_drvdata(spi);
 626
 627         iio_device_unregister(indio_dev);
 628         adis16240_remove_trigger(indio_dev);
 629         iio_buffer_unregister(indio_dev);
 630         adis16240_unconfigure_ring(indio_dev);
 631         iio_device_free(indio_dev);
 632
 633         return 0;
 634 }
 635
 636 static struct spi_driver adis16240_driver = {
 637         .driver = {
 638                 .name = "adis16240",
 639                 .owner = THIS_MODULE,
 640         },
 641         .probe = adis16240_probe,
 642         .remove = __devexit_p(adis16240_remove),
 643 };
 644 module_spi_driver(adis16240_driver);
 645
 646 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 647 MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder");
 648 MODULE_LICENSE("GPL v2");
 649 MODULE_ALIAS("spi:adis16240");