drivers/iio/gyro/st_gyro_core.c

   1 /*
   2  * STMicroelectronics gyroscopes driver
   3  *
   4  * Copyright 2012-2013 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
  27 #include <linux/iio/common/st_sensors.h>
  28 #include "st_gyro.h"
  29
  30 #define ST_GYRO_NUMBER_DATA_CHANNELS            3
  31
  32 /* DEFAULT VALUE FOR SENSORS */
  33 #define ST_GYRO_DEFAULT_OUT_X_L_ADDR            0x28
  34 #define ST_GYRO_DEFAULT_OUT_Y_L_ADDR            0x2a
  35 #define ST_GYRO_DEFAULT_OUT_Z_L_ADDR            0x2c
  36
  37 /* FULLSCALE */
  38 #define ST_GYRO_FS_AVL_250DPS                   250
  39 #define ST_GYRO_FS_AVL_500DPS                   500
  40 #define ST_GYRO_FS_AVL_2000DPS                  2000
  41
  42 /* CUSTOM VALUES FOR SENSOR 1 */
  43 #define ST_GYRO_1_WAI_EXP                       0xd3
  44 #define ST_GYRO_1_ODR_ADDR                      0x20
  45 #define ST_GYRO_1_ODR_MASK                      0xc0
  46 #define ST_GYRO_1_ODR_AVL_100HZ_VAL             0x00
  47 #define ST_GYRO_1_ODR_AVL_200HZ_VAL             0x01
  48 #define ST_GYRO_1_ODR_AVL_400HZ_VAL             0x02
  49 #define ST_GYRO_1_ODR_AVL_800HZ_VAL             0x03
  50 #define ST_GYRO_1_PW_ADDR                       0x20
  51 #define ST_GYRO_1_PW_MASK                       0x08
  52 #define ST_GYRO_1_FS_ADDR                       0x23
  53 #define ST_GYRO_1_FS_MASK                       0x30
  54 #define ST_GYRO_1_FS_AVL_250_VAL                0x00
  55 #define ST_GYRO_1_FS_AVL_500_VAL                0x01
  56 #define ST_GYRO_1_FS_AVL_2000_VAL               0x02
  57 #define ST_GYRO_1_FS_AVL_250_GAIN               IIO_DEGREE_TO_RAD(8750)
  58 #define ST_GYRO_1_FS_AVL_500_GAIN               IIO_DEGREE_TO_RAD(17500)
  59 #define ST_GYRO_1_FS_AVL_2000_GAIN              IIO_DEGREE_TO_RAD(70000)
  60 #define ST_GYRO_1_BDU_ADDR                      0x23
  61 #define ST_GYRO_1_BDU_MASK                      0x80
  62 #define ST_GYRO_1_DRDY_IRQ_ADDR                 0x22
  63 #define ST_GYRO_1_DRDY_IRQ_INT2_MASK            0x08
  64 #define ST_GYRO_1_MULTIREAD_BIT                 true
  65
  66 /* CUSTOM VALUES FOR SENSOR 2 */
  67 #define ST_GYRO_2_WAI_EXP                       0xd4
  68 #define ST_GYRO_2_ODR_ADDR                      0x20
  69 #define ST_GYRO_2_ODR_MASK                      0xc0
  70 #define ST_GYRO_2_ODR_AVL_95HZ_VAL              0x00
  71 #define ST_GYRO_2_ODR_AVL_190HZ_VAL             0x01
  72 #define ST_GYRO_2_ODR_AVL_380HZ_VAL             0x02
  73 #define ST_GYRO_2_ODR_AVL_760HZ_VAL             0x03
  74 #define ST_GYRO_2_PW_ADDR                       0x20
  75 #define ST_GYRO_2_PW_MASK                       0x08
  76 #define ST_GYRO_2_FS_ADDR                       0x23
  77 #define ST_GYRO_2_FS_MASK                       0x30
  78 #define ST_GYRO_2_FS_AVL_250_VAL                0x00
  79 #define ST_GYRO_2_FS_AVL_500_VAL                0x01
  80 #define ST_GYRO_2_FS_AVL_2000_VAL               0x02
  81 #define ST_GYRO_2_FS_AVL_250_GAIN               IIO_DEGREE_TO_RAD(8750)
  82 #define ST_GYRO_2_FS_AVL_500_GAIN               IIO_DEGREE_TO_RAD(17500)
  83 #define ST_GYRO_2_FS_AVL_2000_GAIN              IIO_DEGREE_TO_RAD(70000)
  84 #define ST_GYRO_2_BDU_ADDR                      0x23
  85 #define ST_GYRO_2_BDU_MASK                      0x80
  86 #define ST_GYRO_2_DRDY_IRQ_ADDR                 0x22
  87 #define ST_GYRO_2_DRDY_IRQ_INT2_MASK            0x08
  88 #define ST_GYRO_2_MULTIREAD_BIT                 true
  89
  90 /* CUSTOM VALUES FOR SENSOR 3 */
  91 #define ST_GYRO_3_WAI_EXP                       0xd7
  92 #define ST_GYRO_3_ODR_ADDR                      0x20
  93 #define ST_GYRO_3_ODR_MASK                      0xc0
  94 #define ST_GYRO_3_ODR_AVL_95HZ_VAL              0x00
  95 #define ST_GYRO_3_ODR_AVL_190HZ_VAL             0x01
  96 #define ST_GYRO_3_ODR_AVL_380HZ_VAL             0x02
  97 #define ST_GYRO_3_ODR_AVL_760HZ_VAL             0x03
  98 #define ST_GYRO_3_PW_ADDR                       0x20
  99 #define ST_GYRO_3_PW_MASK                       0x08
 100 #define ST_GYRO_3_FS_ADDR                       0x23
 101 #define ST_GYRO_3_FS_MASK                       0x30
 102 #define ST_GYRO_3_FS_AVL_250_VAL                0x00
 103 #define ST_GYRO_3_FS_AVL_500_VAL                0x01
 104 #define ST_GYRO_3_FS_AVL_2000_VAL               0x02
 105 #define ST_GYRO_3_FS_AVL_250_GAIN               IIO_DEGREE_TO_RAD(8750)
 106 #define ST_GYRO_3_FS_AVL_500_GAIN               IIO_DEGREE_TO_RAD(17500)
 107 #define ST_GYRO_3_FS_AVL_2000_GAIN              IIO_DEGREE_TO_RAD(70000)
 108 #define ST_GYRO_3_BDU_ADDR                      0x23
 109 #define ST_GYRO_3_BDU_MASK                      0x80
 110 #define ST_GYRO_3_DRDY_IRQ_ADDR                 0x22
 111 #define ST_GYRO_3_DRDY_IRQ_INT2_MASK            0x08
 112 #define ST_GYRO_3_MULTIREAD_BIT                 true
 113
 114
 115 static const struct iio_chan_spec st_gyro_16bit_channels[] = {
 116         ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
 117                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 118                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
 119                         ST_GYRO_DEFAULT_OUT_X_L_ADDR),
 120         ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
 121                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 122                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
 123                         ST_GYRO_DEFAULT_OUT_Y_L_ADDR),
 124         ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL,
 125                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
 126                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
 127                         ST_GYRO_DEFAULT_OUT_Z_L_ADDR),
 128         IIO_CHAN_SOFT_TIMESTAMP(3)
 129 };
 130
 131 static const struct st_sensor_settings st_gyro_sensors_settings[] = {
 132         {
 133                 .wai = ST_GYRO_1_WAI_EXP,
 134                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 135                 .sensors_supported = {
 136                         [0] = L3G4200D_GYRO_DEV_NAME,
 137                         [1] = LSM330DL_GYRO_DEV_NAME,
 138                 },
 139                 .ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
 140                 .odr = {
 141                         .addr = ST_GYRO_1_ODR_ADDR,
 142                         .mask = ST_GYRO_1_ODR_MASK,
 143                         .odr_avl = {
 144                                 { 100, ST_GYRO_1_ODR_AVL_100HZ_VAL, },
 145                                 { 200, ST_GYRO_1_ODR_AVL_200HZ_VAL, },
 146                                 { 400, ST_GYRO_1_ODR_AVL_400HZ_VAL, },
 147                                 { 800, ST_GYRO_1_ODR_AVL_800HZ_VAL, },
 148                         },
 149                 },
 150                 .pw = {
 151                         .addr = ST_GYRO_1_PW_ADDR,
 152                         .mask = ST_GYRO_1_PW_MASK,
 153                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 154                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 155                 },
 156                 .enable_axis = {
 157                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 158                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 159                 },
 160                 .fs = {
 161                         .addr = ST_GYRO_1_FS_ADDR,
 162                         .mask = ST_GYRO_1_FS_MASK,
 163                         .fs_avl = {
 164                                 [0] = {
 165                                         .num = ST_GYRO_FS_AVL_250DPS,
 166                                         .value = ST_GYRO_1_FS_AVL_250_VAL,
 167                                         .gain = ST_GYRO_1_FS_AVL_250_GAIN,
 168                                 },
 169                                 [1] = {
 170                                         .num = ST_GYRO_FS_AVL_500DPS,
 171                                         .value = ST_GYRO_1_FS_AVL_500_VAL,
 172                                         .gain = ST_GYRO_1_FS_AVL_500_GAIN,
 173                                 },
 174                                 [2] = {
 175                                         .num = ST_GYRO_FS_AVL_2000DPS,
 176                                         .value = ST_GYRO_1_FS_AVL_2000_VAL,
 177                                         .gain = ST_GYRO_1_FS_AVL_2000_GAIN,
 178                                 },
 179                         },
 180                 },
 181                 .bdu = {
 182                         .addr = ST_GYRO_1_BDU_ADDR,
 183                         .mask = ST_GYRO_1_BDU_MASK,
 184                 },
 185                 .drdy_irq = {
 186                         .addr = ST_GYRO_1_DRDY_IRQ_ADDR,
 187                         .mask_int2 = ST_GYRO_1_DRDY_IRQ_INT2_MASK,
 188                         /*
 189                          * The sensor has IHL (active low) and open
 190                          * drain settings, but only for INT1 and not
 191                          * for the DRDY line on INT2.
 192                          */
 193                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 194                 },
 195                 .multi_read_bit = ST_GYRO_1_MULTIREAD_BIT,
 196                 .bootime = 2,
 197         },
 198         {
 199                 .wai = ST_GYRO_2_WAI_EXP,
 200                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 201                 .sensors_supported = {
 202                         [0] = L3GD20_GYRO_DEV_NAME,
 203                         [1] = LSM330D_GYRO_DEV_NAME,
 204                         [2] = LSM330DLC_GYRO_DEV_NAME,
 205                         [3] = L3G4IS_GYRO_DEV_NAME,
 206                         [4] = LSM330_GYRO_DEV_NAME,
 207                         [5] = LSM9DS0_GYRO_DEV_NAME,
 208                 },
 209                 .ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
 210                 .odr = {
 211                         .addr = ST_GYRO_2_ODR_ADDR,
 212                         .mask = ST_GYRO_2_ODR_MASK,
 213                         .odr_avl = {
 214                                 { 95, ST_GYRO_2_ODR_AVL_95HZ_VAL, },
 215                                 { 190, ST_GYRO_2_ODR_AVL_190HZ_VAL, },
 216                                 { 380, ST_GYRO_2_ODR_AVL_380HZ_VAL, },
 217                                 { 760, ST_GYRO_2_ODR_AVL_760HZ_VAL, },
 218                         },
 219                 },
 220                 .pw = {
 221                         .addr = ST_GYRO_2_PW_ADDR,
 222                         .mask = ST_GYRO_2_PW_MASK,
 223                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 224                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 225                 },
 226                 .enable_axis = {
 227                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 228                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 229                 },
 230                 .fs = {
 231                         .addr = ST_GYRO_2_FS_ADDR,
 232                         .mask = ST_GYRO_2_FS_MASK,
 233                         .fs_avl = {
 234                                 [0] = {
 235                                         .num = ST_GYRO_FS_AVL_250DPS,
 236                                         .value = ST_GYRO_2_FS_AVL_250_VAL,
 237                                         .gain = ST_GYRO_2_FS_AVL_250_GAIN,
 238                                 },
 239                                 [1] = {
 240                                         .num = ST_GYRO_FS_AVL_500DPS,
 241                                         .value = ST_GYRO_2_FS_AVL_500_VAL,
 242                                         .gain = ST_GYRO_2_FS_AVL_500_GAIN,
 243                                 },
 244                                 [2] = {
 245                                         .num = ST_GYRO_FS_AVL_2000DPS,
 246                                         .value = ST_GYRO_2_FS_AVL_2000_VAL,
 247                                         .gain = ST_GYRO_2_FS_AVL_2000_GAIN,
 248                                 },
 249                         },
 250                 },
 251                 .bdu = {
 252                         .addr = ST_GYRO_2_BDU_ADDR,
 253                         .mask = ST_GYRO_2_BDU_MASK,
 254                 },
 255                 .drdy_irq = {
 256                         .addr = ST_GYRO_2_DRDY_IRQ_ADDR,
 257                         .mask_int2 = ST_GYRO_2_DRDY_IRQ_INT2_MASK,
 258                         /*
 259                          * The sensor has IHL (active low) and open
 260                          * drain settings, but only for INT1 and not
 261                          * for the DRDY line on INT2.
 262                          */
 263                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 264                 },
 265                 .multi_read_bit = ST_GYRO_2_MULTIREAD_BIT,
 266                 .bootime = 2,
 267         },
 268         {
 269                 .wai = ST_GYRO_3_WAI_EXP,
 270                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 271                 .sensors_supported = {
 272                         [0] = L3GD20_GYRO_DEV_NAME,
 273                 },
 274                 .ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
 275                 .odr = {
 276                         .addr = ST_GYRO_3_ODR_ADDR,
 277                         .mask = ST_GYRO_3_ODR_MASK,
 278                         .odr_avl = {
 279                                 { 95, ST_GYRO_3_ODR_AVL_95HZ_VAL, },
 280                                 { 190, ST_GYRO_3_ODR_AVL_190HZ_VAL, },
 281                                 { 380, ST_GYRO_3_ODR_AVL_380HZ_VAL, },
 282                                 { 760, ST_GYRO_3_ODR_AVL_760HZ_VAL, },
 283                         },
 284                 },
 285                 .pw = {
 286                         .addr = ST_GYRO_3_PW_ADDR,
 287                         .mask = ST_GYRO_3_PW_MASK,
 288                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 289                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 290                 },
 291                 .enable_axis = {
 292                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 293                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 294                 },
 295                 .fs = {
 296                         .addr = ST_GYRO_3_FS_ADDR,
 297                         .mask = ST_GYRO_3_FS_MASK,
 298                         .fs_avl = {
 299                                 [0] = {
 300                                         .num = ST_GYRO_FS_AVL_250DPS,
 301                                         .value = ST_GYRO_3_FS_AVL_250_VAL,
 302                                         .gain = ST_GYRO_3_FS_AVL_250_GAIN,
 303                                 },
 304                                 [1] = {
 305                                         .num = ST_GYRO_FS_AVL_500DPS,
 306                                         .value = ST_GYRO_3_FS_AVL_500_VAL,
 307                                         .gain = ST_GYRO_3_FS_AVL_500_GAIN,
 308                                 },
 309                                 [2] = {
 310                                         .num = ST_GYRO_FS_AVL_2000DPS,
 311                                         .value = ST_GYRO_3_FS_AVL_2000_VAL,
 312                                         .gain = ST_GYRO_3_FS_AVL_2000_GAIN,
 313                                 },
 314                         },
 315                 },
 316                 .bdu = {
 317                         .addr = ST_GYRO_3_BDU_ADDR,
 318                         .mask = ST_GYRO_3_BDU_MASK,
 319                 },
 320                 .drdy_irq = {
 321                         .addr = ST_GYRO_3_DRDY_IRQ_ADDR,
 322                         .mask_int2 = ST_GYRO_3_DRDY_IRQ_INT2_MASK,
 323                         /*
 324                          * The sensor has IHL (active low) and open
 325                          * drain settings, but only for INT1 and not
 326                          * for the DRDY line on INT2.
 327                          */
 328                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 329                 },
 330                 .multi_read_bit = ST_GYRO_3_MULTIREAD_BIT,
 331                 .bootime = 2,
 332         },
 333 };
 334
 335 static int st_gyro_read_raw(struct iio_dev *indio_dev,
 336                         struct iio_chan_spec const *ch, int *val,
 337                                                         int *val2, long mask)
 338 {
 339         int err;
 340         struct st_sensor_data *gdata = iio_priv(indio_dev);
 341
 342         switch (mask) {
 343         case IIO_CHAN_INFO_RAW:
 344                 err = st_sensors_read_info_raw(indio_dev, ch, val);
 345                 if (err < 0)
 346                         goto read_error;
 347
 348                 return IIO_VAL_INT;
 349         case IIO_CHAN_INFO_SCALE:
 350                 *val = 0;
 351                 *val2 = gdata->current_fullscale->gain;
 352                 return IIO_VAL_INT_PLUS_MICRO;
 353         case IIO_CHAN_INFO_SAMP_FREQ:
 354                 *val = gdata->odr;
 355                 return IIO_VAL_INT;
 356         default:
 357                 return -EINVAL;
 358         }
 359
 360 read_error:
 361         return err;
 362 }
 363
 364 static int st_gyro_write_raw(struct iio_dev *indio_dev,
 365                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 366 {
 367         int err;
 368
 369         switch (mask) {
 370         case IIO_CHAN_INFO_SCALE:
 371                 err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
 372                 break;
 373         case IIO_CHAN_INFO_SAMP_FREQ:
 374                 if (val2)
 375                         return -EINVAL;
 376                 mutex_lock(&indio_dev->mlock);
 377                 err = st_sensors_set_odr(indio_dev, val);
 378                 mutex_unlock(&indio_dev->mlock);
 379                 return err;
 380         default:
 381                 err = -EINVAL;
 382         }
 383
 384         return err;
 385 }
 386
 387 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
 388 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_anglvel_scale_available);
 389
 390 static struct attribute *st_gyro_attributes[] = {
 391         &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 392         &iio_dev_attr_in_anglvel_scale_available.dev_attr.attr,
 393         NULL,
 394 };
 395
 396 static const struct attribute_group st_gyro_attribute_group = {
 397         .attrs = st_gyro_attributes,
 398 };
 399
 400 static const struct iio_info gyro_info = {
 401         .driver_module = THIS_MODULE,
 402         .attrs = &st_gyro_attribute_group,
 403         .read_raw = &st_gyro_read_raw,
 404         .write_raw = &st_gyro_write_raw,
 405         .debugfs_reg_access = &st_sensors_debugfs_reg_access,
 406 };
 407
 408 #ifdef CONFIG_IIO_TRIGGER
 409 static const struct iio_trigger_ops st_gyro_trigger_ops = {
 410         .owner = THIS_MODULE,
 411         .set_trigger_state = ST_GYRO_TRIGGER_SET_STATE,
 412         .validate_device = st_sensors_validate_device,
 413 };
 414 #define ST_GYRO_TRIGGER_OPS (&st_gyro_trigger_ops)
 415 #else
 416 #define ST_GYRO_TRIGGER_OPS NULL
 417 #endif
 418
 419 int st_gyro_common_probe(struct iio_dev *indio_dev)
 420 {
 421         struct st_sensor_data *gdata = iio_priv(indio_dev);
 422         int irq = gdata->get_irq_data_ready(indio_dev);
 423         int err;
 424
 425         indio_dev->modes = INDIO_DIRECT_MODE;
 426         indio_dev->info = &gyro_info;
 427         mutex_init(&gdata->tb.buf_lock);
 428
 429         st_sensors_power_enable(indio_dev);
 430
 431         err = st_sensors_check_device_support(indio_dev,
 432                                         ARRAY_SIZE(st_gyro_sensors_settings),
 433                                         st_gyro_sensors_settings);
 434         if (err < 0)
 435                 return err;
 436
 437         gdata->num_data_channels = ST_GYRO_NUMBER_DATA_CHANNELS;
 438         gdata->multiread_bit = gdata->sensor_settings->multi_read_bit;
 439         indio_dev->channels = gdata->sensor_settings->ch;
 440         indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
 441
 442         gdata->current_fullscale = (struct st_sensor_fullscale_avl *)
 443                                         &gdata->sensor_settings->fs.fs_avl[0];
 444         gdata->odr = gdata->sensor_settings->odr.odr_avl[0].hz;
 445
 446         err = st_sensors_init_sensor(indio_dev,
 447                                 (struct st_sensors_platform_data *)&gyro_pdata);
 448         if (err < 0)
 449                 return err;
 450
 451         err = st_gyro_allocate_ring(indio_dev);
 452         if (err < 0)
 453                 return err;
 454
 455         if (irq > 0) {
 456                 err = st_sensors_allocate_trigger(indio_dev,
 457                                                   ST_GYRO_TRIGGER_OPS);
 458                 if (err < 0)
 459                         goto st_gyro_probe_trigger_error;
 460         }
 461
 462         err = iio_device_register(indio_dev);
 463         if (err)
 464                 goto st_gyro_device_register_error;
 465
 466         dev_info(&indio_dev->dev, "registered gyroscope %s\n",
 467                  indio_dev->name);
 468
 469         return 0;
 470
 471 st_gyro_device_register_error:
 472         if (irq > 0)
 473                 st_sensors_deallocate_trigger(indio_dev);
 474 st_gyro_probe_trigger_error:
 475         st_gyro_deallocate_ring(indio_dev);
 476
 477         return err;
 478 }
 479 EXPORT_SYMBOL(st_gyro_common_probe);
 480
 481 void st_gyro_common_remove(struct iio_dev *indio_dev)
 482 {
 483         struct st_sensor_data *gdata = iio_priv(indio_dev);
 484
 485         st_sensors_power_disable(indio_dev);
 486
 487         iio_device_unregister(indio_dev);
 488         if (gdata->get_irq_data_ready(indio_dev) > 0)
 489                 st_sensors_deallocate_trigger(indio_dev);
 490
 491         st_gyro_deallocate_ring(indio_dev);
 492 }
 493 EXPORT_SYMBOL(st_gyro_common_remove);
 494
 495 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 496 MODULE_DESCRIPTION("STMicroelectronics gyroscopes driver");
 497 MODULE_LICENSE("GPL v2");