drivers/iio/pressure/st_pressure_core.c

   1 /*
   2  * STMicroelectronics pressures driver
   3  *
   4  * Copyright 2013 STMicroelectronics Inc.
   5  *
   6  * Denis Ciocca <denis.ciocca@st.com>
   7  *
   8  * Licensed under the GPL-2.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/errno.h>
  15 #include <linux/types.h>
  16 #include <linux/mutex.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/i2c.h>
  19 #include <linux/gpio.h>
  20 #include <linux/irq.h>
  21 #include <linux/delay.h>
  22 #include <linux/iio/iio.h>
  23 #include <linux/iio/sysfs.h>
  24 #include <linux/iio/trigger.h>
  25 #include <linux/iio/buffer.h>
  26 #include <asm/unaligned.h>
  27
  28 #include <linux/iio/common/st_sensors.h>
  29 #include "st_pressure.h"
  30
  31 #define ST_PRESS_LSB_PER_MBAR                   4096UL
  32 #define ST_PRESS_KPASCAL_NANO_SCALE             (100000000UL / \
  33                                                  ST_PRESS_LSB_PER_MBAR)
  34 #define ST_PRESS_LSB_PER_CELSIUS                480UL
  35 #define ST_PRESS_CELSIUS_NANO_SCALE             (1000000000UL / \
  36                                                  ST_PRESS_LSB_PER_CELSIUS)
  37 #define ST_PRESS_NUMBER_DATA_CHANNELS           1
  38
  39 /* FULLSCALE */
  40 #define ST_PRESS_FS_AVL_1260MB                  1260
  41
  42 #define ST_PRESS_1_OUT_XL_ADDR                  0x28
  43 #define ST_TEMP_1_OUT_L_ADDR                    0x2b
  44
  45 /* CUSTOM VALUES FOR LPS331AP SENSOR */
  46 #define ST_PRESS_LPS331AP_WAI_EXP               0xbb
  47 #define ST_PRESS_LPS331AP_ODR_ADDR              0x20
  48 #define ST_PRESS_LPS331AP_ODR_MASK              0x70
  49 #define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL       0x01
  50 #define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL       0x05
  51 #define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL      0x06
  52 #define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL      0x07
  53 #define ST_PRESS_LPS331AP_PW_ADDR               0x20
  54 #define ST_PRESS_LPS331AP_PW_MASK               0x80
  55 #define ST_PRESS_LPS331AP_FS_ADDR               0x23
  56 #define ST_PRESS_LPS331AP_FS_MASK               0x30
  57 #define ST_PRESS_LPS331AP_FS_AVL_1260_VAL       0x00
  58 #define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN      ST_PRESS_KPASCAL_NANO_SCALE
  59 #define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN      ST_PRESS_CELSIUS_NANO_SCALE
  60 #define ST_PRESS_LPS331AP_BDU_ADDR              0x20
  61 #define ST_PRESS_LPS331AP_BDU_MASK              0x04
  62 #define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR         0x22
  63 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK    0x04
  64 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK    0x20
  65 #define ST_PRESS_LPS331AP_IHL_IRQ_ADDR          0x22
  66 #define ST_PRESS_LPS331AP_IHL_IRQ_MASK          0x80
  67 #define ST_PRESS_LPS331AP_MULTIREAD_BIT         true
  68 #define ST_PRESS_LPS331AP_TEMP_OFFSET           42500
  69
  70 /* CUSTOM VALUES FOR LPS001WP SENSOR */
  71 #define ST_PRESS_LPS001WP_WAI_EXP               0xba
  72 #define ST_PRESS_LPS001WP_ODR_ADDR              0x20
  73 #define ST_PRESS_LPS001WP_ODR_MASK              0x30
  74 #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL       0x01
  75 #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL       0x02
  76 #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL      0x03
  77 #define ST_PRESS_LPS001WP_PW_ADDR               0x20
  78 #define ST_PRESS_LPS001WP_PW_MASK               0x40
  79 #define ST_PRESS_LPS001WP_BDU_ADDR              0x20
  80 #define ST_PRESS_LPS001WP_BDU_MASK              0x04
  81 #define ST_PRESS_LPS001WP_MULTIREAD_BIT         true
  82 #define ST_PRESS_LPS001WP_OUT_L_ADDR            0x28
  83 #define ST_TEMP_LPS001WP_OUT_L_ADDR             0x2a
  84
  85 /* CUSTOM VALUES FOR LPS25H SENSOR */
  86 #define ST_PRESS_LPS25H_WAI_EXP                 0xbd
  87 #define ST_PRESS_LPS25H_ODR_ADDR                0x20
  88 #define ST_PRESS_LPS25H_ODR_MASK                0x70
  89 #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL         0x01
  90 #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL         0x02
  91 #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL        0x03
  92 #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL        0x04
  93 #define ST_PRESS_LPS25H_PW_ADDR                 0x20
  94 #define ST_PRESS_LPS25H_PW_MASK                 0x80
  95 #define ST_PRESS_LPS25H_FS_ADDR                 0x00
  96 #define ST_PRESS_LPS25H_FS_MASK                 0x00
  97 #define ST_PRESS_LPS25H_FS_AVL_1260_VAL         0x00
  98 #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN        ST_PRESS_KPASCAL_NANO_SCALE
  99 #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN        ST_PRESS_CELSIUS_NANO_SCALE
 100 #define ST_PRESS_LPS25H_BDU_ADDR                0x20
 101 #define ST_PRESS_LPS25H_BDU_MASK                0x04
 102 #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR           0x23
 103 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK      0x01
 104 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK      0x10
 105 #define ST_PRESS_LPS25H_IHL_IRQ_ADDR            0x22
 106 #define ST_PRESS_LPS25H_IHL_IRQ_MASK            0x80
 107 #define ST_PRESS_LPS25H_MULTIREAD_BIT           true
 108 #define ST_PRESS_LPS25H_TEMP_OFFSET             42500
 109 #define ST_PRESS_LPS25H_OUT_XL_ADDR             0x28
 110 #define ST_TEMP_LPS25H_OUT_L_ADDR               0x2b
 111
 112 static const struct iio_chan_spec st_press_1_channels[] = {
 113         {
 114                 .type = IIO_PRESSURE,
 115                 .channel2 = IIO_NO_MOD,
 116                 .address = ST_PRESS_1_OUT_XL_ADDR,
 117                 .scan_index = ST_SENSORS_SCAN_X,
 118                 .scan_type = {
 119                         .sign = 'u',
 120                         .realbits = 24,
 121                         .storagebits = 24,
 122                         .endianness = IIO_LE,
 123                 },
 124                 .info_mask_separate =
 125                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 126                 .modified = 0,
 127         },
 128         {
 129                 .type = IIO_TEMP,
 130                 .channel2 = IIO_NO_MOD,
 131                 .address = ST_TEMP_1_OUT_L_ADDR,
 132                 .scan_index = -1,
 133                 .scan_type = {
 134                         .sign = 'u',
 135                         .realbits = 16,
 136                         .storagebits = 16,
 137                         .endianness = IIO_LE,
 138                 },
 139                 .info_mask_separate =
 140                         BIT(IIO_CHAN_INFO_RAW) |
 141                         BIT(IIO_CHAN_INFO_SCALE) |
 142                         BIT(IIO_CHAN_INFO_OFFSET),
 143                 .modified = 0,
 144         },
 145         IIO_CHAN_SOFT_TIMESTAMP(1)
 146 };
 147
 148 static const struct iio_chan_spec st_press_lps001wp_channels[] = {
 149         {
 150                 .type = IIO_PRESSURE,
 151                 .channel2 = IIO_NO_MOD,
 152                 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
 153                 .scan_index = ST_SENSORS_SCAN_X,
 154                 .scan_type = {
 155                         .sign = 'u',
 156                         .realbits = 16,
 157                         .storagebits = 16,
 158                         .endianness = IIO_LE,
 159                 },
 160                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 161                 .modified = 0,
 162         },
 163         {
 164                 .type = IIO_TEMP,
 165                 .channel2 = IIO_NO_MOD,
 166                 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
 167                 .scan_index = -1,
 168                 .scan_type = {
 169                         .sign = 'u',
 170                         .realbits = 16,
 171                         .storagebits = 16,
 172                         .endianness = IIO_LE,
 173                 },
 174                 .info_mask_separate =
 175                         BIT(IIO_CHAN_INFO_RAW) |
 176                         BIT(IIO_CHAN_INFO_OFFSET),
 177                 .modified = 0,
 178         },
 179         IIO_CHAN_SOFT_TIMESTAMP(1)
 180 };
 181
 182 static const struct st_sensor_settings st_press_sensors_settings[] = {
 183         {
 184                 .wai = ST_PRESS_LPS331AP_WAI_EXP,
 185                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 186                 .sensors_supported = {
 187                         [0] = LPS331AP_PRESS_DEV_NAME,
 188                 },
 189                 .ch = (struct iio_chan_spec *)st_press_1_channels,
 190                 .num_ch = ARRAY_SIZE(st_press_1_channels),
 191                 .odr = {
 192                         .addr = ST_PRESS_LPS331AP_ODR_ADDR,
 193                         .mask = ST_PRESS_LPS331AP_ODR_MASK,
 194                         .odr_avl = {
 195                                 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
 196                                 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
 197                                 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
 198                                 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
 199                         },
 200                 },
 201                 .pw = {
 202                         .addr = ST_PRESS_LPS331AP_PW_ADDR,
 203                         .mask = ST_PRESS_LPS331AP_PW_MASK,
 204                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 205                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 206                 },
 207                 .fs = {
 208                         .addr = ST_PRESS_LPS331AP_FS_ADDR,
 209                         .mask = ST_PRESS_LPS331AP_FS_MASK,
 210                         .fs_avl = {
 211                                 [0] = {
 212                                         .num = ST_PRESS_FS_AVL_1260MB,
 213                                         .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
 214                                         .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
 215                                         .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
 216                                 },
 217                         },
 218                 },
 219                 .bdu = {
 220                         .addr = ST_PRESS_LPS331AP_BDU_ADDR,
 221                         .mask = ST_PRESS_LPS331AP_BDU_MASK,
 222                 },
 223                 .drdy_irq = {
 224                         .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
 225                         .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
 226                         .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
 227                         .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR,
 228                         .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK,
 229                 },
 230                 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
 231                 .bootime = 2,
 232         },
 233         {
 234                 .wai = ST_PRESS_LPS001WP_WAI_EXP,
 235                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 236                 .sensors_supported = {
 237                         [0] = LPS001WP_PRESS_DEV_NAME,
 238                 },
 239                 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
 240                 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
 241                 .odr = {
 242                         .addr = ST_PRESS_LPS001WP_ODR_ADDR,
 243                         .mask = ST_PRESS_LPS001WP_ODR_MASK,
 244                         .odr_avl = {
 245                                 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
 246                                 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
 247                                 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
 248                         },
 249                 },
 250                 .pw = {
 251                         .addr = ST_PRESS_LPS001WP_PW_ADDR,
 252                         .mask = ST_PRESS_LPS001WP_PW_MASK,
 253                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 254                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 255                 },
 256                 .fs = {
 257                         .addr = 0,
 258                 },
 259                 .bdu = {
 260                         .addr = ST_PRESS_LPS001WP_BDU_ADDR,
 261                         .mask = ST_PRESS_LPS001WP_BDU_MASK,
 262                 },
 263                 .drdy_irq = {
 264                         .addr = 0,
 265                 },
 266                 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
 267                 .bootime = 2,
 268         },
 269         {
 270                 .wai = ST_PRESS_LPS25H_WAI_EXP,
 271                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 272                 .sensors_supported = {
 273                         [0] = LPS25H_PRESS_DEV_NAME,
 274                 },
 275                 .ch = (struct iio_chan_spec *)st_press_1_channels,
 276                 .num_ch = ARRAY_SIZE(st_press_1_channels),
 277                 .odr = {
 278                         .addr = ST_PRESS_LPS25H_ODR_ADDR,
 279                         .mask = ST_PRESS_LPS25H_ODR_MASK,
 280                         .odr_avl = {
 281                                 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
 282                                 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
 283                                 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
 284                                 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
 285                         },
 286                 },
 287                 .pw = {
 288                         .addr = ST_PRESS_LPS25H_PW_ADDR,
 289                         .mask = ST_PRESS_LPS25H_PW_MASK,
 290                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 291                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 292                 },
 293                 .fs = {
 294                         .addr = ST_PRESS_LPS25H_FS_ADDR,
 295                         .mask = ST_PRESS_LPS25H_FS_MASK,
 296                         .fs_avl = {
 297                                 [0] = {
 298                                         .num = ST_PRESS_FS_AVL_1260MB,
 299                                         .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
 300                                         .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
 301                                         .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
 302                                 },
 303                         },
 304                 },
 305                 .bdu = {
 306                         .addr = ST_PRESS_LPS25H_BDU_ADDR,
 307                         .mask = ST_PRESS_LPS25H_BDU_MASK,
 308                 },
 309                 .drdy_irq = {
 310                         .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
 311                         .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
 312                         .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
 313                         .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR,
 314                         .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK,
 315                 },
 316                 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
 317                 .bootime = 2,
 318         },
 319 };
 320
 321 static int st_press_write_raw(struct iio_dev *indio_dev,
 322                               struct iio_chan_spec const *ch,
 323                               int val,
 324                               int val2,
 325                               long mask)
 326 {
 327         int err;
 328
 329         switch (mask) {
 330         case IIO_CHAN_INFO_SAMP_FREQ:
 331                 if (val2)
 332                         return -EINVAL;
 333                 mutex_lock(&indio_dev->mlock);
 334                 err = st_sensors_set_odr(indio_dev, val);
 335                 mutex_unlock(&indio_dev->mlock);
 336                 return err;
 337         default:
 338                 return -EINVAL;
 339         }
 340 }
 341
 342 static int st_press_read_raw(struct iio_dev *indio_dev,
 343                         struct iio_chan_spec const *ch, int *val,
 344                                                         int *val2, long mask)
 345 {
 346         int err;
 347         struct st_sensor_data *press_data = iio_priv(indio_dev);
 348
 349         switch (mask) {
 350         case IIO_CHAN_INFO_RAW:
 351                 err = st_sensors_read_info_raw(indio_dev, ch, val);
 352                 if (err < 0)
 353                         goto read_error;
 354
 355                 return IIO_VAL_INT;
 356         case IIO_CHAN_INFO_SCALE:
 357                 *val = 0;
 358
 359                 switch (ch->type) {
 360                 case IIO_PRESSURE:
 361                         *val2 = press_data->current_fullscale->gain;
 362                         break;
 363                 case IIO_TEMP:
 364                         *val2 = press_data->current_fullscale->gain2;
 365                         break;
 366                 default:
 367                         err = -EINVAL;
 368                         goto read_error;
 369                 }
 370
 371                 return IIO_VAL_INT_PLUS_NANO;
 372         case IIO_CHAN_INFO_OFFSET:
 373                 switch (ch->type) {
 374                 case IIO_TEMP:
 375                         *val = 425;
 376                         *val2 = 10;
 377                         break;
 378                 default:
 379                         err = -EINVAL;
 380                         goto read_error;
 381                 }
 382
 383                 return IIO_VAL_FRACTIONAL;
 384         case IIO_CHAN_INFO_SAMP_FREQ:
 385                 *val = press_data->odr;
 386                 return IIO_VAL_INT;
 387         default:
 388                 return -EINVAL;
 389         }
 390
 391 read_error:
 392         return err;
 393 }
 394
 395 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
 396
 397 static struct attribute *st_press_attributes[] = {
 398         &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 399         NULL,
 400 };
 401
 402 static const struct attribute_group st_press_attribute_group = {
 403         .attrs = st_press_attributes,
 404 };
 405
 406 static const struct iio_info press_info = {
 407         .driver_module = THIS_MODULE,
 408         .attrs = &st_press_attribute_group,
 409         .read_raw = &st_press_read_raw,
 410         .write_raw = &st_press_write_raw,
 411         .debugfs_reg_access = &st_sensors_debugfs_reg_access,
 412 };
 413
 414 #ifdef CONFIG_IIO_TRIGGER
 415 static const struct iio_trigger_ops st_press_trigger_ops = {
 416         .owner = THIS_MODULE,
 417         .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
 418 };
 419 #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
 420 #else
 421 #define ST_PRESS_TRIGGER_OPS NULL
 422 #endif
 423
 424 int st_press_common_probe(struct iio_dev *indio_dev)
 425 {
 426         struct st_sensor_data *press_data = iio_priv(indio_dev);
 427         int irq = press_data->get_irq_data_ready(indio_dev);
 428         int err;
 429
 430         indio_dev->modes = INDIO_DIRECT_MODE;
 431         indio_dev->info = &press_info;
 432         mutex_init(&press_data->tb.buf_lock);
 433
 434         st_sensors_power_enable(indio_dev);
 435
 436         err = st_sensors_check_device_support(indio_dev,
 437                                         ARRAY_SIZE(st_press_sensors_settings),
 438                                         st_press_sensors_settings);
 439         if (err < 0)
 440                 return err;
 441
 442         press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
 443         press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
 444         indio_dev->channels = press_data->sensor_settings->ch;
 445         indio_dev->num_channels = press_data->sensor_settings->num_ch;
 446
 447         if (press_data->sensor_settings->fs.addr != 0)
 448                 press_data->current_fullscale =
 449                         (struct st_sensor_fullscale_avl *)
 450                                 &press_data->sensor_settings->fs.fs_avl[0];
 451
 452         press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
 453
 454         /* Some devices don't support a data ready pin. */
 455         if (!press_data->dev->platform_data &&
 456                                 press_data->sensor_settings->drdy_irq.addr)
 457                 press_data->dev->platform_data =
 458                         (struct st_sensors_platform_data *)&default_press_pdata;
 459
 460         err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
 461         if (err < 0)
 462                 return err;
 463
 464         err = st_press_allocate_ring(indio_dev);
 465         if (err < 0)
 466                 return err;
 467
 468         if (irq > 0) {
 469                 err = st_sensors_allocate_trigger(indio_dev,
 470                                                   ST_PRESS_TRIGGER_OPS);
 471                 if (err < 0)
 472                         goto st_press_probe_trigger_error;
 473         }
 474
 475         err = iio_device_register(indio_dev);
 476         if (err)
 477                 goto st_press_device_register_error;
 478
 479         dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
 480                  indio_dev->name);
 481
 482         return err;
 483
 484 st_press_device_register_error:
 485         if (irq > 0)
 486                 st_sensors_deallocate_trigger(indio_dev);
 487 st_press_probe_trigger_error:
 488         st_press_deallocate_ring(indio_dev);
 489
 490         return err;
 491 }
 492 EXPORT_SYMBOL(st_press_common_probe);
 493
 494 void st_press_common_remove(struct iio_dev *indio_dev)
 495 {
 496         struct st_sensor_data *press_data = iio_priv(indio_dev);
 497
 498         st_sensors_power_disable(indio_dev);
 499
 500         iio_device_unregister(indio_dev);
 501         if (press_data->get_irq_data_ready(indio_dev) > 0)
 502                 st_sensors_deallocate_trigger(indio_dev);
 503
 504         st_press_deallocate_ring(indio_dev);
 505 }
 506 EXPORT_SYMBOL(st_press_common_remove);
 507
 508 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 509 MODULE_DESCRIPTION("STMicroelectronics pressures driver");
 510 MODULE_LICENSE("GPL v2");