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"); 788