drivers/iio/accel/st_accel_core.c

   1 /*
   2  * STMicroelectronics accelerometers 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/iio/iio.h>
  22 #include <linux/iio/sysfs.h>
  23 #include <linux/iio/trigger.h>
  24 #include <linux/iio/buffer.h>
  25
  26 #include <linux/iio/common/st_sensors.h>
  27 #include "st_accel.h"
  28
  29 #define ST_ACCEL_NUMBER_DATA_CHANNELS           3
  30
  31 /* DEFAULT VALUE FOR SENSORS */
  32 #define ST_ACCEL_DEFAULT_OUT_X_L_ADDR           0x28
  33 #define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR           0x2a
  34 #define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR           0x2c
  35
  36 /* FULLSCALE */
  37 #define ST_ACCEL_FS_AVL_2G                      2
  38 #define ST_ACCEL_FS_AVL_4G                      4
  39 #define ST_ACCEL_FS_AVL_6G                      6
  40 #define ST_ACCEL_FS_AVL_8G                      8
  41 #define ST_ACCEL_FS_AVL_16G                     16
  42 #define ST_ACCEL_FS_AVL_100G                    100
  43 #define ST_ACCEL_FS_AVL_200G                    200
  44 #define ST_ACCEL_FS_AVL_400G                    400
  45
  46 static const struct iio_chan_spec st_accel_8bit_channels[] = {
  47         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  48                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  49                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8,
  50                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1),
  51         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  52                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  53                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8,
  54                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1),
  55         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  56                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  57                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8,
  58                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1),
  59         IIO_CHAN_SOFT_TIMESTAMP(3)
  60 };
  61
  62 static const struct iio_chan_spec st_accel_12bit_channels[] = {
  63         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  64                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  65                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
  66                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
  67         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  68                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  69                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
  70                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
  71         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  72                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  73                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
  74                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
  75         IIO_CHAN_SOFT_TIMESTAMP(3)
  76 };
  77
  78 static const struct iio_chan_spec st_accel_16bit_channels[] = {
  79         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  80                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  81                         ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
  82                         ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
  83         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  84                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  85                         ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
  86                         ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
  87         ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
  88                         BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
  89                         ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
  90                         ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
  91         IIO_CHAN_SOFT_TIMESTAMP(3)
  92 };
  93
  94 static const struct st_sensor_settings st_accel_sensors_settings[] = {
  95         {
  96                 .wai = 0x33,
  97                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
  98                 .sensors_supported = {
  99                         [0] = LIS3DH_ACCEL_DEV_NAME,
 100                         [1] = LSM303DLHC_ACCEL_DEV_NAME,
 101                         [2] = LSM330D_ACCEL_DEV_NAME,
 102                         [3] = LSM330DL_ACCEL_DEV_NAME,
 103                         [4] = LSM330DLC_ACCEL_DEV_NAME,
 104                         [5] = LSM303AGR_ACCEL_DEV_NAME,
 105                         [6] = LIS2DH12_ACCEL_DEV_NAME,
 106                 },
 107                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 108                 .odr = {
 109                         .addr = 0x20,
 110                         .mask = 0xf0,
 111                         .odr_avl = {
 112                                 { .hz = 1, .value = 0x01, },
 113                                 { .hz = 10, .value = 0x02, },
 114                                 { .hz = 25, .value = 0x03, },
 115                                 { .hz = 50, .value = 0x04, },
 116                                 { .hz = 100, .value = 0x05, },
 117                                 { .hz = 200, .value = 0x06, },
 118                                 { .hz = 400, .value = 0x07, },
 119                                 { .hz = 1600, .value = 0x08, },
 120                         },
 121                 },
 122                 .pw = {
 123                         .addr = 0x20,
 124                         .mask = 0xf0,
 125                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 126                 },
 127                 .enable_axis = {
 128                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 129                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 130                 },
 131                 .fs = {
 132                         .addr = 0x23,
 133                         .mask = 0x30,
 134                         .fs_avl = {
 135                                 [0] = {
 136                                         .num = ST_ACCEL_FS_AVL_2G,
 137                                         .value = 0x00,
 138                                         .gain = IIO_G_TO_M_S_2(1000),
 139                                 },
 140                                 [1] = {
 141                                         .num = ST_ACCEL_FS_AVL_4G,
 142                                         .value = 0x01,
 143                                         .gain = IIO_G_TO_M_S_2(2000),
 144                                 },
 145                                 [2] = {
 146                                         .num = ST_ACCEL_FS_AVL_8G,
 147                                         .value = 0x02,
 148                                         .gain = IIO_G_TO_M_S_2(4000),
 149                                 },
 150                                 [3] = {
 151                                         .num = ST_ACCEL_FS_AVL_16G,
 152                                         .value = 0x03,
 153                                         .gain = IIO_G_TO_M_S_2(12000),
 154                                 },
 155                         },
 156                 },
 157                 .bdu = {
 158                         .addr = 0x23,
 159                         .mask = 0x80,
 160                 },
 161                 .drdy_irq = {
 162                         .addr = 0x22,
 163                         .mask_int1 = 0x10,
 164                         .mask_int2 = 0x08,
 165                         .addr_ihl = 0x25,
 166                         .mask_ihl = 0x02,
 167                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 168                 },
 169                 .multi_read_bit = true,
 170                 .bootime = 2,
 171         },
 172         {
 173                 .wai = 0x32,
 174                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 175                 .sensors_supported = {
 176                         [0] = LIS331DLH_ACCEL_DEV_NAME,
 177                         [1] = LSM303DL_ACCEL_DEV_NAME,
 178                         [2] = LSM303DLH_ACCEL_DEV_NAME,
 179                         [3] = LSM303DLM_ACCEL_DEV_NAME,
 180                 },
 181                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 182                 .odr = {
 183                         .addr = 0x20,
 184                         .mask = 0x18,
 185                         .odr_avl = {
 186                                 { .hz = 50, .value = 0x00, },
 187                                 { .hz = 100, .value = 0x01, },
 188                                 { .hz = 400, .value = 0x02, },
 189                                 { .hz = 1000, .value = 0x03, },
 190                         },
 191                 },
 192                 .pw = {
 193                         .addr = 0x20,
 194                         .mask = 0xe0,
 195                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 196                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 197                 },
 198                 .enable_axis = {
 199                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 200                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 201                 },
 202                 .fs = {
 203                         .addr = 0x23,
 204                         .mask = 0x30,
 205                         .fs_avl = {
 206                                 [0] = {
 207                                         .num = ST_ACCEL_FS_AVL_2G,
 208                                         .value = 0x00,
 209                                         .gain = IIO_G_TO_M_S_2(1000),
 210                                 },
 211                                 [1] = {
 212                                         .num = ST_ACCEL_FS_AVL_4G,
 213                                         .value = 0x01,
 214                                         .gain = IIO_G_TO_M_S_2(2000),
 215                                 },
 216                                 [2] = {
 217                                         .num = ST_ACCEL_FS_AVL_8G,
 218                                         .value = 0x03,
 219                                         .gain = IIO_G_TO_M_S_2(3900),
 220                                 },
 221                         },
 222                 },
 223                 .bdu = {
 224                         .addr = 0x23,
 225                         .mask = 0x80,
 226                 },
 227                 .drdy_irq = {
 228                         .addr = 0x22,
 229                         .mask_int1 = 0x02,
 230                         .mask_int2 = 0x10,
 231                         .addr_ihl = 0x22,
 232                         .mask_ihl = 0x80,
 233                         .addr_od = 0x22,
 234                         .mask_od = 0x40,
 235                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 236                 },
 237                 .multi_read_bit = true,
 238                 .bootime = 2,
 239         },
 240         {
 241                 .wai = 0x40,
 242                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 243                 .sensors_supported = {
 244                         [0] = LSM330_ACCEL_DEV_NAME,
 245                 },
 246                 .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
 247                 .odr = {
 248                         .addr = 0x20,
 249                         .mask = 0xf0,
 250                         .odr_avl = {
 251                                 { .hz = 3, .value = 0x01, },
 252                                 { .hz = 6, .value = 0x02, },
 253                                 { .hz = 12, .value = 0x03, },
 254                                 { .hz = 25, .value = 0x04, },
 255                                 { .hz = 50, .value = 0x05, },
 256                                 { .hz = 100, .value = 0x06, },
 257                                 { .hz = 200, .value = 0x07, },
 258                                 { .hz = 400, .value = 0x08, },
 259                                 { .hz = 800, .value = 0x09, },
 260                                 { .hz = 1600, .value = 0x0a, },
 261                         },
 262                 },
 263                 .pw = {
 264                         .addr = 0x20,
 265                         .mask = 0xf0,
 266                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 267                 },
 268                 .enable_axis = {
 269                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 270                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 271                 },
 272                 .fs = {
 273                         .addr = 0x24,
 274                         .mask = 0x38,
 275                         .fs_avl = {
 276                                 [0] = {
 277                                         .num = ST_ACCEL_FS_AVL_2G,
 278                                         .value = 0x00,
 279                                         .gain = IIO_G_TO_M_S_2(61),
 280                                 },
 281                                 [1] = {
 282                                         .num = ST_ACCEL_FS_AVL_4G,
 283                                         .value = 0x01,
 284                                         .gain = IIO_G_TO_M_S_2(122),
 285                                 },
 286                                 [2] = {
 287                                         .num = ST_ACCEL_FS_AVL_6G,
 288                                         .value = 0x02,
 289                                         .gain = IIO_G_TO_M_S_2(183),
 290                                 },
 291                                 [3] = {
 292                                         .num = ST_ACCEL_FS_AVL_8G,
 293                                         .value = 0x03,
 294                                         .gain = IIO_G_TO_M_S_2(244),
 295                                 },
 296                                 [4] = {
 297                                         .num = ST_ACCEL_FS_AVL_16G,
 298                                         .value = 0x04,
 299                                         .gain = IIO_G_TO_M_S_2(732),
 300                                 },
 301                         },
 302                 },
 303                 .bdu = {
 304                         .addr = 0x20,
 305                         .mask = 0x08,
 306                 },
 307                 .drdy_irq = {
 308                         .addr = 0x23,
 309                         .mask_int1 = 0x80,
 310                         .mask_int2 = 0x00,
 311                         .addr_ihl = 0x23,
 312                         .mask_ihl = 0x40,
 313                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 314                         .ig1 = {
 315                                 .en_addr = 0x23,
 316                                 .en_mask = 0x08,
 317                         },
 318                 },
 319                 .multi_read_bit = false,
 320                 .bootime = 2,
 321         },
 322         {
 323                 .wai = 0x3a,
 324                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 325                 .sensors_supported = {
 326                         [0] = LIS3LV02DL_ACCEL_DEV_NAME,
 327                 },
 328                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 329                 .odr = {
 330                         .addr = 0x20,
 331                         .mask = 0x30, /* DF1 and DF0 */
 332                         .odr_avl = {
 333                                 { .hz = 40, .value = 0x00, },
 334                                 { .hz = 160, .value = 0x01, },
 335                                 { .hz = 640, .value = 0x02, },
 336                                 { .hz = 2560, .value = 0x03, },
 337                         },
 338                 },
 339                 .pw = {
 340                         .addr = 0x20,
 341                         .mask = 0xc0,
 342                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 343                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 344                 },
 345                 .enable_axis = {
 346                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 347                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 348                 },
 349                 .fs = {
 350                         .addr = 0x21,
 351                         .mask = 0x80,
 352                         .fs_avl = {
 353                                 [0] = {
 354                                         .num = ST_ACCEL_FS_AVL_2G,
 355                                         .value = 0x00,
 356                                         .gain = IIO_G_TO_M_S_2(1024),
 357                                 },
 358                                 [1] = {
 359                                         .num = ST_ACCEL_FS_AVL_6G,
 360                                         .value = 0x01,
 361                                         .gain = IIO_G_TO_M_S_2(340),
 362                                 },
 363                         },
 364                 },
 365                 .bdu = {
 366                         .addr = 0x21,
 367                         .mask = 0x40,
 368                 },
 369                 .drdy_irq = {
 370                         .addr = 0x21,
 371                         .mask_int1 = 0x04,
 372                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 373                 },
 374                 .multi_read_bit = true,
 375                 .bootime = 2, /* guess */
 376         },
 377         {
 378                 .wai = 0x3b,
 379                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 380                 .sensors_supported = {
 381                         [0] = LIS331DL_ACCEL_DEV_NAME,
 382                 },
 383                 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
 384                 .odr = {
 385                         .addr = 0x20,
 386                         .mask = 0x80,
 387                         .odr_avl = {
 388                                 { .hz = 100, .value = 0x00, },
 389                                 { .hz = 400, .value = 0x01, },
 390                         },
 391                 },
 392                 .pw = {
 393                         .addr = 0x20,
 394                         .mask = 0x40,
 395                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 396                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 397                 },
 398                 .enable_axis = {
 399                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 400                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 401                 },
 402                 .fs = {
 403                         .addr = 0x20,
 404                         .mask = 0x20,
 405                         /*
 406                          * TODO: check these resulting gain settings, these are
 407                          * not in the datsheet
 408                          */
 409                         .fs_avl = {
 410                                 [0] = {
 411                                         .num = ST_ACCEL_FS_AVL_2G,
 412                                         .value = 0x00,
 413                                         .gain = IIO_G_TO_M_S_2(18000),
 414                                 },
 415                                 [1] = {
 416                                         .num = ST_ACCEL_FS_AVL_8G,
 417                                         .value = 0x01,
 418                                         .gain = IIO_G_TO_M_S_2(72000),
 419                                 },
 420                         },
 421                 },
 422                 .drdy_irq = {
 423                         .addr = 0x22,
 424                         .mask_int1 = 0x04,
 425                         .mask_int2 = 0x20,
 426                         .addr_ihl = 0x22,
 427                         .mask_ihl = 0x80,
 428                         .addr_od = 0x22,
 429                         .mask_od = 0x40,
 430                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 431                 },
 432                 .multi_read_bit = false,
 433                 .bootime = 2, /* guess */
 434         },
 435         {
 436                 .wai = 0x32,
 437                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 438                 .sensors_supported = {
 439                         [0] = H3LIS331DL_DRIVER_NAME,
 440                 },
 441                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 442                 .odr = {
 443                         .addr = 0x20,
 444                         .mask = 0x18,
 445                         .odr_avl = {
 446                                 { .hz = 50, .value = 0x00, },
 447                                 { .hz = 100, .value = 0x01, },
 448                                 { .hz = 400, .value = 0x02, },
 449                                 { .hz = 1000, .value = 0x03, },
 450                         },
 451                 },
 452                 .pw = {
 453                         .addr = 0x20,
 454                         .mask = 0x20,
 455                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 456                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 457                 },
 458                 .enable_axis = {
 459                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 460                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 461                 },
 462                 .fs = {
 463                         .addr = 0x23,
 464                         .mask = 0x30,
 465                         .fs_avl = {
 466                                 [0] = {
 467                                         .num = ST_ACCEL_FS_AVL_100G,
 468                                         .value = 0x00,
 469                                         .gain = IIO_G_TO_M_S_2(49000),
 470                                 },
 471                                 [1] = {
 472                                         .num = ST_ACCEL_FS_AVL_200G,
 473                                         .value = 0x01,
 474                                         .gain = IIO_G_TO_M_S_2(98000),
 475                                 },
 476                                 [2] = {
 477                                         .num = ST_ACCEL_FS_AVL_400G,
 478                                         .value = 0x03,
 479                                         .gain = IIO_G_TO_M_S_2(195000),
 480                                 },
 481                         },
 482                 },
 483                 .bdu = {
 484                         .addr = 0x23,
 485                         .mask = 0x80,
 486                 },
 487                 .drdy_irq = {
 488                         .addr = 0x22,
 489                         .mask_int1 = 0x02,
 490                         .mask_int2 = 0x10,
 491                         .addr_ihl = 0x22,
 492                         .mask_ihl = 0x80,
 493                 },
 494                 .multi_read_bit = true,
 495                 .bootime = 2,
 496         },
 497         {
 498                 /* No WAI register present */
 499                 .sensors_supported = {
 500                         [0] = LIS3L02DQ_ACCEL_DEV_NAME,
 501                 },
 502                 .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
 503                 .odr = {
 504                         .addr = 0x20,
 505                         .mask = 0x30,
 506                         .odr_avl = {
 507                                 { .hz = 280, .value = 0x00, },
 508                                 { .hz = 560, .value = 0x01, },
 509                                 { .hz = 1120, .value = 0x02, },
 510                                 { .hz = 4480, .value = 0x03, },
 511                         },
 512                 },
 513                 .pw = {
 514                         .addr = 0x20,
 515                         .mask = 0xc0,
 516                         .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
 517                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 518                 },
 519                 .enable_axis = {
 520                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 521                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 522                 },
 523                 .fs = {
 524                         .fs_avl = {
 525                                 [0] = {
 526                                         .num = ST_ACCEL_FS_AVL_2G,
 527                                         .gain = IIO_G_TO_M_S_2(488),
 528                                 },
 529                         },
 530                 },
 531                 /*
 532                  * The part has a BDU bit but if set the data is never
 533                  * updated so don't set it.
 534                  */
 535                 .bdu = {
 536                 },
 537                 .drdy_irq = {
 538                         .addr = 0x21,
 539                         .mask_int1 = 0x04,
 540                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 541                 },
 542                 .multi_read_bit = false,
 543                 .bootime = 2,
 544         },
 545         {
 546                 .wai = 0x33,
 547                 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
 548                 .sensors_supported = {
 549                         [0] = LNG2DM_ACCEL_DEV_NAME,
 550                 },
 551                 .ch = (struct iio_chan_spec *)st_accel_8bit_channels,
 552                 .odr = {
 553                         .addr = 0x20,
 554                         .mask = 0xf0,
 555                         .odr_avl = {
 556                                 { .hz = 1, .value = 0x01, },
 557                                 { .hz = 10, .value = 0x02, },
 558                                 { .hz = 25, .value = 0x03, },
 559                                 { .hz = 50, .value = 0x04, },
 560                                 { .hz = 100, .value = 0x05, },
 561                                 { .hz = 200, .value = 0x06, },
 562                                 { .hz = 400, .value = 0x07, },
 563                                 { .hz = 1600, .value = 0x08, },
 564                         },
 565                 },
 566                 .pw = {
 567                         .addr = 0x20,
 568                         .mask = 0xf0,
 569                         .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
 570                 },
 571                 .enable_axis = {
 572                         .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
 573                         .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
 574                 },
 575                 .fs = {
 576                         .addr = 0x23,
 577                         .mask = 0x30,
 578                         .fs_avl = {
 579                                 [0] = {
 580                                         .num = ST_ACCEL_FS_AVL_2G,
 581                                         .value = 0x00,
 582                                         .gain = IIO_G_TO_M_S_2(15600),
 583                                 },
 584                                 [1] = {
 585                                         .num = ST_ACCEL_FS_AVL_4G,
 586                                         .value = 0x01,
 587                                         .gain = IIO_G_TO_M_S_2(31200),
 588                                 },
 589                                 [2] = {
 590                                         .num = ST_ACCEL_FS_AVL_8G,
 591                                         .value = 0x02,
 592                                         .gain = IIO_G_TO_M_S_2(62500),
 593                                 },
 594                                 [3] = {
 595                                         .num = ST_ACCEL_FS_AVL_16G,
 596                                         .value = 0x03,
 597                                         .gain = IIO_G_TO_M_S_2(187500),
 598                                 },
 599                         },
 600                 },
 601                 .drdy_irq = {
 602                         .addr = 0x22,
 603                         .mask_int1 = 0x10,
 604                         .mask_int2 = 0x08,
 605                         .addr_ihl = 0x25,
 606                         .mask_ihl = 0x02,
 607                         .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
 608                 },
 609                 .multi_read_bit = true,
 610                 .bootime = 2,
 611         },
 612 };
 613
 614 static int st_accel_read_raw(struct iio_dev *indio_dev,
 615                         struct iio_chan_spec const *ch, int *val,
 616                                                         int *val2, long mask)
 617 {
 618         int err;
 619         struct st_sensor_data *adata = iio_priv(indio_dev);
 620
 621         switch (mask) {
 622         case IIO_CHAN_INFO_RAW:
 623                 err = st_sensors_read_info_raw(indio_dev, ch, val);
 624                 if (err < 0)
 625                         goto read_error;
 626
 627                 return IIO_VAL_INT;
 628         case IIO_CHAN_INFO_SCALE:
 629                 *val = adata->current_fullscale->gain / 1000000;
 630                 *val2 = adata->current_fullscale->gain % 1000000;
 631                 return IIO_VAL_INT_PLUS_MICRO;
 632         case IIO_CHAN_INFO_SAMP_FREQ:
 633                 *val = adata->odr;
 634                 return IIO_VAL_INT;
 635         default:
 636                 return -EINVAL;
 637         }
 638
 639 read_error:
 640         return err;
 641 }
 642
 643 static int st_accel_write_raw(struct iio_dev *indio_dev,
 644                 struct iio_chan_spec const *chan, int val, int val2, long mask)
 645 {
 646         int err;
 647
 648         switch (mask) {
 649         case IIO_CHAN_INFO_SCALE: {
 650                 int gain;
 651
 652                 gain = val * 1000000 + val2;
 653                 err = st_sensors_set_fullscale_by_gain(indio_dev, gain);
 654                 break;
 655         }
 656         case IIO_CHAN_INFO_SAMP_FREQ:
 657                 if (val2)
 658                         return -EINVAL;
 659                 mutex_lock(&indio_dev->mlock);
 660                 err = st_sensors_set_odr(indio_dev, val);
 661                 mutex_unlock(&indio_dev->mlock);
 662                 return err;
 663         default:
 664                 return -EINVAL;
 665         }
 666
 667         return err;
 668 }
 669
 670 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
 671 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
 672
 673 static struct attribute *st_accel_attributes[] = {
 674         &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
 675         &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
 676         NULL,
 677 };
 678
 679 static const struct attribute_group st_accel_attribute_group = {
 680         .attrs = st_accel_attributes,
 681 };
 682
 683 static const struct iio_info accel_info = {
 684         .driver_module = THIS_MODULE,
 685         .attrs = &st_accel_attribute_group,
 686         .read_raw = &st_accel_read_raw,
 687         .write_raw = &st_accel_write_raw,
 688         .debugfs_reg_access = &st_sensors_debugfs_reg_access,
 689 };
 690
 691 #ifdef CONFIG_IIO_TRIGGER
 692 static const struct iio_trigger_ops st_accel_trigger_ops = {
 693         .owner = THIS_MODULE,
 694         .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
 695         .validate_device = st_sensors_validate_device,
 696 };
 697 #define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
 698 #else
 699 #define ST_ACCEL_TRIGGER_OPS NULL
 700 #endif
 701
 702 int st_accel_common_probe(struct iio_dev *indio_dev)
 703 {
 704         struct st_sensor_data *adata = iio_priv(indio_dev);
 705         int irq = adata->get_irq_data_ready(indio_dev);
 706         int err;
 707
 708         indio_dev->modes = INDIO_DIRECT_MODE;
 709         indio_dev->info = &accel_info;
 710         mutex_init(&adata->tb.buf_lock);
 711
 712         err = st_sensors_power_enable(indio_dev);
 713         if (err)
 714                 return err;
 715
 716         err = st_sensors_check_device_support(indio_dev,
 717                                         ARRAY_SIZE(st_accel_sensors_settings),
 718                                         st_accel_sensors_settings);
 719         if (err < 0)
 720                 goto st_accel_power_off;
 721
 722         adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
 723         adata->multiread_bit = adata->sensor_settings->multi_read_bit;
 724         indio_dev->channels = adata->sensor_settings->ch;
 725         indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
 726
 727         adata->current_fullscale = (struct st_sensor_fullscale_avl *)
 728                                         &adata->sensor_settings->fs.fs_avl[0];
 729         adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
 730
 731         if (!adata->dev->platform_data)
 732                 adata->dev->platform_data =
 733                         (struct st_sensors_platform_data *)&default_accel_pdata;
 734
 735         err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data);
 736         if (err < 0)
 737                 goto st_accel_power_off;
 738
 739         err = st_accel_allocate_ring(indio_dev);
 740         if (err < 0)
 741                 goto st_accel_power_off;
 742
 743         if (irq > 0) {
 744                 err = st_sensors_allocate_trigger(indio_dev,
 745                                                  ST_ACCEL_TRIGGER_OPS);
 746                 if (err < 0)
 747                         goto st_accel_probe_trigger_error;
 748         }
 749
 750         err = iio_device_register(indio_dev);
 751         if (err)
 752                 goto st_accel_device_register_error;
 753
 754         dev_info(&indio_dev->dev, "registered accelerometer %s\n",
 755                  indio_dev->name);
 756
 757         return 0;
 758
 759 st_accel_device_register_error:
 760         if (irq > 0)
 761                 st_sensors_deallocate_trigger(indio_dev);
 762 st_accel_probe_trigger_error:
 763         st_accel_deallocate_ring(indio_dev);
 764 st_accel_power_off:
 765         st_sensors_power_disable(indio_dev);
 766
 767         return err;
 768 }
 769 EXPORT_SYMBOL(st_accel_common_probe);
 770
 771 void st_accel_common_remove(struct iio_dev *indio_dev)
 772 {
 773         struct st_sensor_data *adata = iio_priv(indio_dev);
 774
 775         st_sensors_power_disable(indio_dev);
 776
 777         iio_device_unregister(indio_dev);
 778         if (adata->get_irq_data_ready(indio_dev) > 0)
 779                 st_sensors_deallocate_trigger(indio_dev);
 780
 781         st_accel_deallocate_ring(indio_dev);
 782 }
 783 EXPORT_SYMBOL(st_accel_common_remove);
 784
 785 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 786 MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
 787 MODULE_LICENSE("GPL v2");