1 /* 2 * KXCJK-1013 3-axis accelerometer driver 3 * Copyright (c) 2014, Intel Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 */ 14 15 #include <linux/module.h> 16 #include <linux/i2c.h> 17 #include <linux/interrupt.h> 18 #include <linux/delay.h> 19 #include <linux/bitops.h> 20 #include <linux/slab.h> 21 #include <linux/string.h> 22 #include <linux/acpi.h> 23 #include <linux/gpio/consumer.h> 24 #include <linux/pm.h> 25 #include <linux/pm_runtime.h> 26 #include <linux/iio/iio.h> 27 #include <linux/iio/sysfs.h> 28 #include <linux/iio/buffer.h> 29 #include <linux/iio/trigger.h> 30 #include <linux/iio/events.h> 31 #include <linux/iio/trigger_consumer.h> 32 #include <linux/iio/triggered_buffer.h> 33 #include <linux/iio/accel/kxcjk_1013.h> 34 35 #define KXCJK1013_DRV_NAME "kxcjk1013" 36 #define KXCJK1013_IRQ_NAME "kxcjk1013_event" 37 38 #define KXCJK1013_REG_XOUT_L 0x06 39 /* 40 * From low byte X axis register, all the other addresses of Y and Z can be 41 * obtained by just applying axis offset. The following axis defines are just 42 * provide clarity, but not used. 43 */ 44 #define KXCJK1013_REG_XOUT_H 0x07 45 #define KXCJK1013_REG_YOUT_L 0x08 46 #define KXCJK1013_REG_YOUT_H 0x09 47 #define KXCJK1013_REG_ZOUT_L 0x0A 48 #define KXCJK1013_REG_ZOUT_H 0x0B 49 50 #define KXCJK1013_REG_DCST_RESP 0x0C 51 #define KXCJK1013_REG_WHO_AM_I 0x0F 52 #define KXCJK1013_REG_INT_SRC1 0x16 53 #define KXCJK1013_REG_INT_SRC2 0x17 54 #define KXCJK1013_REG_STATUS_REG 0x18 55 #define KXCJK1013_REG_INT_REL 0x1A 56 #define KXCJK1013_REG_CTRL1 0x1B 57 #define KXCJK1013_REG_CTRL2 0x1D 58 #define KXCJK1013_REG_INT_CTRL1 0x1E 59 #define KXCJK1013_REG_INT_CTRL2 0x1F 60 #define KXCJK1013_REG_DATA_CTRL 0x21 61 #define KXCJK1013_REG_WAKE_TIMER 0x29 62 #define KXCJK1013_REG_SELF_TEST 0x3A 63 #define KXCJK1013_REG_WAKE_THRES 0x6A 64 65 #define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7) 66 #define KXCJK1013_REG_CTRL1_BIT_RES BIT(6) 67 #define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5) 68 #define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4) 69 #define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3) 70 #define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1) 71 #define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4) 72 #define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5) 73 74 #define KXCJK1013_DATA_MASK_12_BIT 0x0FFF 75 #define KXCJK1013_MAX_STARTUP_TIME_US 100000 76 77 #define KXCJK1013_SLEEP_DELAY_MS 2000 78 79 #define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0) 80 #define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1) 81 #define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2) 82 #define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3) 83 #define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4) 84 #define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5) 85 86 #define KXCJK1013_DEFAULT_WAKE_THRES 1 87 88 enum kx_chipset { 89 KXCJK1013, 90 KXCJ91008, 91 KXTJ21009, 92 KX_MAX_CHIPS /* this must be last */ 93 }; 94 95 struct kxcjk1013_data { 96 struct i2c_client *client; 97 struct iio_trigger *dready_trig; 98 struct iio_trigger *motion_trig; 99 struct mutex mutex; 100 s16 buffer[8]; 101 u8 odr_bits; 102 u8 range; 103 int wake_thres; 104 int wake_dur; 105 bool active_high_intr; 106 bool dready_trigger_on; 107 int ev_enable_state; 108 bool motion_trigger_on; 109 int64_t timestamp; 110 enum kx_chipset chipset; 111 bool is_smo8500_device; 112 }; 113 114 enum kxcjk1013_axis { 115 AXIS_X, 116 AXIS_Y, 117 AXIS_Z, 118 }; 119 120 enum kxcjk1013_mode { 121 STANDBY, 122 OPERATION, 123 }; 124 125 enum kxcjk1013_range { 126 KXCJK1013_RANGE_2G, 127 KXCJK1013_RANGE_4G, 128 KXCJK1013_RANGE_8G, 129 }; 130 131 static const struct { 132 int val; 133 int val2; 134 int odr_bits; 135 } samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09}, 136 {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0}, 137 {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03}, 138 {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06}, 139 {1600, 0, 0x07} }; 140 141 /* Refer to section 4 of the specification */ 142 static const struct { 143 int odr_bits; 144 int usec; 145 } odr_start_up_times[KX_MAX_CHIPS][12] = { 146 /* KXCJK-1013 */ 147 { 148 {0x08, 100000}, 149 {0x09, 100000}, 150 {0x0A, 100000}, 151 {0x0B, 100000}, 152 {0, 80000}, 153 {0x01, 41000}, 154 {0x02, 21000}, 155 {0x03, 11000}, 156 {0x04, 6400}, 157 {0x05, 3900}, 158 {0x06, 2700}, 159 {0x07, 2100}, 160 }, 161 /* KXCJ9-1008 */ 162 { 163 {0x08, 100000}, 164 {0x09, 100000}, 165 {0x0A, 100000}, 166 {0x0B, 100000}, 167 {0, 80000}, 168 {0x01, 41000}, 169 {0x02, 21000}, 170 {0x03, 11000}, 171 {0x04, 6400}, 172 {0x05, 3900}, 173 {0x06, 2700}, 174 {0x07, 2100}, 175 }, 176 /* KXCTJ2-1009 */ 177 { 178 {0x08, 1240000}, 179 {0x09, 621000}, 180 {0x0A, 309000}, 181 {0x0B, 151000}, 182 {0, 80000}, 183 {0x01, 41000}, 184 {0x02, 21000}, 185 {0x03, 11000}, 186 {0x04, 6000}, 187 {0x05, 4000}, 188 {0x06, 3000}, 189 {0x07, 2000}, 190 }, 191 }; 192 193 static const struct { 194 u16 scale; 195 u8 gsel_0; 196 u8 gsel_1; 197 } KXCJK1013_scale_table[] = { {9582, 0, 0}, 198 {19163, 1, 0}, 199 {38326, 0, 1} }; 200 201 static const struct { 202 int val; 203 int val2; 204 int odr_bits; 205 } wake_odr_data_rate_table[] = { {0, 781000, 0x00}, 206 {1, 563000, 0x01}, 207 {3, 125000, 0x02}, 208 {6, 250000, 0x03}, 209 {12, 500000, 0x04}, 210 {25, 0, 0x05}, 211 {50, 0, 0x06}, 212 {100, 0, 0x06}, 213 {200, 0, 0x06}, 214 {400, 0, 0x06}, 215 {800, 0, 0x06}, 216 {1600, 0, 0x06} }; 217 218 static int kxcjk1013_set_mode(struct kxcjk1013_data *data, 219 enum kxcjk1013_mode mode) 220 { 221 int ret; 222 223 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); 224 if (ret < 0) { 225 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 226 return ret; 227 } 228 229 if (mode == STANDBY) 230 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1; 231 else 232 ret |= KXCJK1013_REG_CTRL1_BIT_PC1; 233 234 ret = i2c_smbus_write_byte_data(data->client, 235 KXCJK1013_REG_CTRL1, ret); 236 if (ret < 0) { 237 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 238 return ret; 239 } 240 241 return 0; 242 } 243 244 static int kxcjk1013_get_mode(struct kxcjk1013_data *data, 245 enum kxcjk1013_mode *mode) 246 { 247 int ret; 248 249 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); 250 if (ret < 0) { 251 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 252 return ret; 253 } 254 255 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1) 256 *mode = OPERATION; 257 else 258 *mode = STANDBY; 259 260 return 0; 261 } 262 263 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index) 264 { 265 int ret; 266 267 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); 268 if (ret < 0) { 269 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 270 return ret; 271 } 272 273 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 | 274 KXCJK1013_REG_CTRL1_BIT_GSEL1); 275 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3); 276 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4); 277 278 ret = i2c_smbus_write_byte_data(data->client, 279 KXCJK1013_REG_CTRL1, 280 ret); 281 if (ret < 0) { 282 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 283 return ret; 284 } 285 286 data->range = range_index; 287 288 return 0; 289 } 290 291 static int kxcjk1013_chip_init(struct kxcjk1013_data *data) 292 { 293 int ret; 294 295 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I); 296 if (ret < 0) { 297 dev_err(&data->client->dev, "Error reading who_am_i\n"); 298 return ret; 299 } 300 301 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret); 302 303 ret = kxcjk1013_set_mode(data, STANDBY); 304 if (ret < 0) 305 return ret; 306 307 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); 308 if (ret < 0) { 309 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 310 return ret; 311 } 312 313 /* Set 12 bit mode */ 314 ret |= KXCJK1013_REG_CTRL1_BIT_RES; 315 316 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1, 317 ret); 318 if (ret < 0) { 319 dev_err(&data->client->dev, "Error reading reg_ctrl\n"); 320 return ret; 321 } 322 323 /* Setting range to 4G */ 324 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G); 325 if (ret < 0) 326 return ret; 327 328 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL); 329 if (ret < 0) { 330 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n"); 331 return ret; 332 } 333 334 data->odr_bits = ret; 335 336 /* Set up INT polarity */ 337 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1); 338 if (ret < 0) { 339 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n"); 340 return ret; 341 } 342 343 if (data->active_high_intr) 344 ret |= KXCJK1013_REG_INT_REG1_BIT_IEA; 345 else 346 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA; 347 348 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1, 349 ret); 350 if (ret < 0) { 351 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n"); 352 return ret; 353 } 354 355 ret = kxcjk1013_set_mode(data, OPERATION); 356 if (ret < 0) 357 return ret; 358 359 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES; 360 361 return 0; 362 } 363 364 #ifdef CONFIG_PM 365 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data) 366 { 367 int i; 368 int idx = data->chipset; 369 370 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) { 371 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits) 372 return odr_start_up_times[idx][i].usec; 373 } 374 375 return KXCJK1013_MAX_STARTUP_TIME_US; 376 } 377 #endif 378 379 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on) 380 { 381 #ifdef CONFIG_PM 382 int ret; 383 384 if (on) 385 ret = pm_runtime_get_sync(&data->client->dev); 386 else { 387 pm_runtime_mark_last_busy(&data->client->dev); 388 ret = pm_runtime_put_autosuspend(&data->client->dev); 389 } 390 if (ret < 0) { 391 dev_err(&data->client->dev, 392 "Failed: kxcjk1013_set_power_state for %d\n", on); 393 if (on) 394 pm_runtime_put_noidle(&data->client->dev); 395 return ret; 396 } 397 #endif 398 399 return 0; 400 } 401 402 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data) 403 { 404 int ret; 405 406 ret = i2c_smbus_write_byte_data(data->client, 407 KXCJK1013_REG_WAKE_TIMER, 408 data->wake_dur); 409 if (ret < 0) { 410 dev_err(&data->client->dev, 411 "Error writing reg_wake_timer\n"); 412 return ret; 413 } 414 415 ret = i2c_smbus_write_byte_data(data->client, 416 KXCJK1013_REG_WAKE_THRES, 417 data->wake_thres); 418 if (ret < 0) { 419 dev_err(&data->client->dev, "Error writing reg_wake_thres\n"); 420 return ret; 421 } 422 423 return 0; 424 } 425 426 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data, 427 bool status) 428 { 429 int ret; 430 enum kxcjk1013_mode store_mode; 431 432 ret = kxcjk1013_get_mode(data, &store_mode); 433 if (ret < 0) 434 return ret; 435 436 /* This is requirement by spec to change state to STANDBY */ 437 ret = kxcjk1013_set_mode(data, STANDBY); 438 if (ret < 0) 439 return ret; 440 441 ret = kxcjk1013_chip_update_thresholds(data); 442 if (ret < 0) 443 return ret; 444 445 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1); 446 if (ret < 0) { 447 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n"); 448 return ret; 449 } 450 451 if (status) 452 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN; 453 else 454 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN; 455 456 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1, 457 ret); 458 if (ret < 0) { 459 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n"); 460 return ret; 461 } 462 463 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); 464 if (ret < 0) { 465 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 466 return ret; 467 } 468 469 if (status) 470 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE; 471 else 472 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE; 473 474 ret = i2c_smbus_write_byte_data(data->client, 475 KXCJK1013_REG_CTRL1, ret); 476 if (ret < 0) { 477 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 478 return ret; 479 } 480 481 if (store_mode == OPERATION) { 482 ret = kxcjk1013_set_mode(data, OPERATION); 483 if (ret < 0) 484 return ret; 485 } 486 487 return 0; 488 } 489 490 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data, 491 bool status) 492 { 493 int ret; 494 enum kxcjk1013_mode store_mode; 495 496 ret = kxcjk1013_get_mode(data, &store_mode); 497 if (ret < 0) 498 return ret; 499 500 /* This is requirement by spec to change state to STANDBY */ 501 ret = kxcjk1013_set_mode(data, STANDBY); 502 if (ret < 0) 503 return ret; 504 505 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1); 506 if (ret < 0) { 507 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n"); 508 return ret; 509 } 510 511 if (status) 512 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN; 513 else 514 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN; 515 516 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1, 517 ret); 518 if (ret < 0) { 519 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n"); 520 return ret; 521 } 522 523 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1); 524 if (ret < 0) { 525 dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); 526 return ret; 527 } 528 529 if (status) 530 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY; 531 else 532 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY; 533 534 ret = i2c_smbus_write_byte_data(data->client, 535 KXCJK1013_REG_CTRL1, ret); 536 if (ret < 0) { 537 dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); 538 return ret; 539 } 540 541 if (store_mode == OPERATION) { 542 ret = kxcjk1013_set_mode(data, OPERATION); 543 if (ret < 0) 544 return ret; 545 } 546 547 return 0; 548 } 549 550 static int kxcjk1013_convert_freq_to_bit(int val, int val2) 551 { 552 int i; 553 554 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) { 555 if (samp_freq_table[i].val == val && 556 samp_freq_table[i].val2 == val2) { 557 return samp_freq_table[i].odr_bits; 558 } 559 } 560 561 return -EINVAL; 562 } 563 564 static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2) 565 { 566 int i; 567 568 for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) { 569 if (wake_odr_data_rate_table[i].val == val && 570 wake_odr_data_rate_table[i].val2 == val2) { 571 return wake_odr_data_rate_table[i].odr_bits; 572 } 573 } 574 575 return -EINVAL; 576 } 577 578 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2) 579 { 580 int ret; 581 int odr_bits; 582 enum kxcjk1013_mode store_mode; 583 584 ret = kxcjk1013_get_mode(data, &store_mode); 585 if (ret < 0) 586 return ret; 587 588 odr_bits = kxcjk1013_convert_freq_to_bit(val, val2); 589 if (odr_bits < 0) 590 return odr_bits; 591 592 /* To change ODR, the chip must be set to STANDBY as per spec */ 593 ret = kxcjk1013_set_mode(data, STANDBY); 594 if (ret < 0) 595 return ret; 596 597 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL, 598 odr_bits); 599 if (ret < 0) { 600 dev_err(&data->client->dev, "Error writing data_ctrl\n"); 601 return ret; 602 } 603 604 data->odr_bits = odr_bits; 605 606 odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2); 607 if (odr_bits < 0) 608 return odr_bits; 609 610 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2, 611 odr_bits); 612 if (ret < 0) { 613 dev_err(&data->client->dev, "Error writing reg_ctrl2\n"); 614 return ret; 615 } 616 617 if (store_mode == OPERATION) { 618 ret = kxcjk1013_set_mode(data, OPERATION); 619 if (ret < 0) 620 return ret; 621 } 622 623 return 0; 624 } 625 626 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2) 627 { 628 int i; 629 630 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) { 631 if (samp_freq_table[i].odr_bits == data->odr_bits) { 632 *val = samp_freq_table[i].val; 633 *val2 = samp_freq_table[i].val2; 634 return IIO_VAL_INT_PLUS_MICRO; 635 } 636 } 637 638 return -EINVAL; 639 } 640 641 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis) 642 { 643 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2; 644 int ret; 645 646 ret = i2c_smbus_read_word_data(data->client, reg); 647 if (ret < 0) { 648 dev_err(&data->client->dev, 649 "failed to read accel_%c registers\n", 'x' + axis); 650 return ret; 651 } 652 653 return ret; 654 } 655 656 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val) 657 { 658 int ret, i; 659 enum kxcjk1013_mode store_mode; 660 661 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) { 662 if (KXCJK1013_scale_table[i].scale == val) { 663 ret = kxcjk1013_get_mode(data, &store_mode); 664 if (ret < 0) 665 return ret; 666 667 ret = kxcjk1013_set_mode(data, STANDBY); 668 if (ret < 0) 669 return ret; 670 671 ret = kxcjk1013_set_range(data, i); 672 if (ret < 0) 673 return ret; 674 675 if (store_mode == OPERATION) { 676 ret = kxcjk1013_set_mode(data, OPERATION); 677 if (ret) 678 return ret; 679 } 680 681 return 0; 682 } 683 } 684 685 return -EINVAL; 686 } 687 688 static int kxcjk1013_read_raw(struct iio_dev *indio_dev, 689 struct iio_chan_spec const *chan, int *val, 690 int *val2, long mask) 691 { 692 struct kxcjk1013_data *data = iio_priv(indio_dev); 693 int ret; 694 695 switch (mask) { 696 case IIO_CHAN_INFO_RAW: 697 mutex_lock(&data->mutex); 698 if (iio_buffer_enabled(indio_dev)) 699 ret = -EBUSY; 700 else { 701 ret = kxcjk1013_set_power_state(data, true); 702 if (ret < 0) { 703 mutex_unlock(&data->mutex); 704 return ret; 705 } 706 ret = kxcjk1013_get_acc_reg(data, chan->scan_index); 707 if (ret < 0) { 708 kxcjk1013_set_power_state(data, false); 709 mutex_unlock(&data->mutex); 710 return ret; 711 } 712 *val = sign_extend32(ret >> 4, 11); 713 ret = kxcjk1013_set_power_state(data, false); 714 } 715 mutex_unlock(&data->mutex); 716 717 if (ret < 0) 718 return ret; 719 720 return IIO_VAL_INT; 721 722 case IIO_CHAN_INFO_SCALE: 723 *val = 0; 724 *val2 = KXCJK1013_scale_table[data->range].scale; 725 return IIO_VAL_INT_PLUS_MICRO; 726 727 case IIO_CHAN_INFO_SAMP_FREQ: 728 mutex_lock(&data->mutex); 729 ret = kxcjk1013_get_odr(data, val, val2); 730 mutex_unlock(&data->mutex); 731 return ret; 732 733 default: 734 return -EINVAL; 735 } 736 } 737 738 static int kxcjk1013_write_raw(struct iio_dev *indio_dev, 739 struct iio_chan_spec const *chan, int val, 740 int val2, long mask) 741 { 742 struct kxcjk1013_data *data = iio_priv(indio_dev); 743 int ret; 744 745 switch (mask) { 746 case IIO_CHAN_INFO_SAMP_FREQ: 747 mutex_lock(&data->mutex); 748 ret = kxcjk1013_set_odr(data, val, val2); 749 mutex_unlock(&data->mutex); 750 break; 751 case IIO_CHAN_INFO_SCALE: 752 if (val) 753 return -EINVAL; 754 755 mutex_lock(&data->mutex); 756 ret = kxcjk1013_set_scale(data, val2); 757 mutex_unlock(&data->mutex); 758 break; 759 default: 760 ret = -EINVAL; 761 } 762 763 return ret; 764 } 765 766 static int kxcjk1013_read_event(struct iio_dev *indio_dev, 767 const struct iio_chan_spec *chan, 768 enum iio_event_type type, 769 enum iio_event_direction dir, 770 enum iio_event_info info, 771 int *val, int *val2) 772 { 773 struct kxcjk1013_data *data = iio_priv(indio_dev); 774 775 *val2 = 0; 776 switch (info) { 777 case IIO_EV_INFO_VALUE: 778 *val = data->wake_thres; 779 break; 780 case IIO_EV_INFO_PERIOD: 781 *val = data->wake_dur; 782 break; 783 default: 784 return -EINVAL; 785 } 786 787 return IIO_VAL_INT; 788 } 789 790 static int kxcjk1013_write_event(struct iio_dev *indio_dev, 791 const struct iio_chan_spec *chan, 792 enum iio_event_type type, 793 enum iio_event_direction dir, 794 enum iio_event_info info, 795 int val, int val2) 796 { 797 struct kxcjk1013_data *data = iio_priv(indio_dev); 798 799 if (data->ev_enable_state) 800 return -EBUSY; 801 802 switch (info) { 803 case IIO_EV_INFO_VALUE: 804 data->wake_thres = val; 805 break; 806 case IIO_EV_INFO_PERIOD: 807 data->wake_dur = val; 808 break; 809 default: 810 return -EINVAL; 811 } 812 813 return 0; 814 } 815 816 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev, 817 const struct iio_chan_spec *chan, 818 enum iio_event_type type, 819 enum iio_event_direction dir) 820 { 821 struct kxcjk1013_data *data = iio_priv(indio_dev); 822 823 return data->ev_enable_state; 824 } 825 826 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev, 827 const struct iio_chan_spec *chan, 828 enum iio_event_type type, 829 enum iio_event_direction dir, 830 int state) 831 { 832 struct kxcjk1013_data *data = iio_priv(indio_dev); 833 int ret; 834 835 if (state && data->ev_enable_state) 836 return 0; 837 838 mutex_lock(&data->mutex); 839 840 if (!state && data->motion_trigger_on) { 841 data->ev_enable_state = 0; 842 mutex_unlock(&data->mutex); 843 return 0; 844 } 845 846 /* 847 * We will expect the enable and disable to do operation in 848 * in reverse order. This will happen here anyway as our 849 * resume operation uses sync mode runtime pm calls, the 850 * suspend operation will be delayed by autosuspend delay 851 * So the disable operation will still happen in reverse of 852 * enable operation. When runtime pm is disabled the mode 853 * is always on so sequence doesn't matter 854 */ 855 ret = kxcjk1013_set_power_state(data, state); 856 if (ret < 0) { 857 mutex_unlock(&data->mutex); 858 return ret; 859 } 860 861 ret = kxcjk1013_setup_any_motion_interrupt(data, state); 862 if (ret < 0) { 863 kxcjk1013_set_power_state(data, false); 864 data->ev_enable_state = 0; 865 mutex_unlock(&data->mutex); 866 return ret; 867 } 868 869 data->ev_enable_state = state; 870 mutex_unlock(&data->mutex); 871 872 return 0; 873 } 874 875 static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev) 876 { 877 struct kxcjk1013_data *data = iio_priv(indio_dev); 878 879 return kxcjk1013_set_power_state(data, true); 880 } 881 882 static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev) 883 { 884 struct kxcjk1013_data *data = iio_priv(indio_dev); 885 886 return kxcjk1013_set_power_state(data, false); 887 } 888 889 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( 890 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600"); 891 892 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326"); 893 894 static struct attribute *kxcjk1013_attributes[] = { 895 &iio_const_attr_sampling_frequency_available.dev_attr.attr, 896 &iio_const_attr_in_accel_scale_available.dev_attr.attr, 897 NULL, 898 }; 899 900 static const struct attribute_group kxcjk1013_attrs_group = { 901 .attrs = kxcjk1013_attributes, 902 }; 903 904 static const struct iio_event_spec kxcjk1013_event = { 905 .type = IIO_EV_TYPE_THRESH, 906 .dir = IIO_EV_DIR_EITHER, 907 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 908 BIT(IIO_EV_INFO_ENABLE) | 909 BIT(IIO_EV_INFO_PERIOD) 910 }; 911 912 #define KXCJK1013_CHANNEL(_axis) { \ 913 .type = IIO_ACCEL, \ 914 .modified = 1, \ 915 .channel2 = IIO_MOD_##_axis, \ 916 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 917 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ 918 BIT(IIO_CHAN_INFO_SAMP_FREQ), \ 919 .scan_index = AXIS_##_axis, \ 920 .scan_type = { \ 921 .sign = 's', \ 922 .realbits = 12, \ 923 .storagebits = 16, \ 924 .shift = 4, \ 925 .endianness = IIO_CPU, \ 926 }, \ 927 .event_spec = &kxcjk1013_event, \ 928 .num_event_specs = 1 \ 929 } 930 931 static const struct iio_chan_spec kxcjk1013_channels[] = { 932 KXCJK1013_CHANNEL(X), 933 KXCJK1013_CHANNEL(Y), 934 KXCJK1013_CHANNEL(Z), 935 IIO_CHAN_SOFT_TIMESTAMP(3), 936 }; 937 938 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = { 939 .preenable = kxcjk1013_buffer_preenable, 940 .postenable = iio_triggered_buffer_postenable, 941 .postdisable = kxcjk1013_buffer_postdisable, 942 .predisable = iio_triggered_buffer_predisable, 943 }; 944 945 static const struct iio_info kxcjk1013_info = { 946 .attrs = &kxcjk1013_attrs_group, 947 .read_raw = kxcjk1013_read_raw, 948 .write_raw = kxcjk1013_write_raw, 949 .read_event_value = kxcjk1013_read_event, 950 .write_event_value = kxcjk1013_write_event, 951 .write_event_config = kxcjk1013_write_event_config, 952 .read_event_config = kxcjk1013_read_event_config, 953 .driver_module = THIS_MODULE, 954 }; 955 956 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p) 957 { 958 struct iio_poll_func *pf = p; 959 struct iio_dev *indio_dev = pf->indio_dev; 960 struct kxcjk1013_data *data = iio_priv(indio_dev); 961 int bit, ret, i = 0; 962 963 mutex_lock(&data->mutex); 964 965 for_each_set_bit(bit, indio_dev->active_scan_mask, 966 indio_dev->masklength) { 967 ret = kxcjk1013_get_acc_reg(data, bit); 968 if (ret < 0) { 969 mutex_unlock(&data->mutex); 970 goto err; 971 } 972 data->buffer[i++] = ret; 973 } 974 mutex_unlock(&data->mutex); 975 976 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, 977 data->timestamp); 978 err: 979 iio_trigger_notify_done(indio_dev->trig); 980 981 return IRQ_HANDLED; 982 } 983 984 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig) 985 { 986 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 987 struct kxcjk1013_data *data = iio_priv(indio_dev); 988 int ret; 989 990 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL); 991 if (ret < 0) { 992 dev_err(&data->client->dev, "Error reading reg_int_rel\n"); 993 return ret; 994 } 995 996 return 0; 997 } 998 999 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig, 1000 bool state) 1001 { 1002 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 1003 struct kxcjk1013_data *data = iio_priv(indio_dev); 1004 int ret; 1005 1006 mutex_lock(&data->mutex); 1007 1008 if (!state && data->ev_enable_state && data->motion_trigger_on) { 1009 data->motion_trigger_on = false; 1010 mutex_unlock(&data->mutex); 1011 return 0; 1012 } 1013 1014 ret = kxcjk1013_set_power_state(data, state); 1015 if (ret < 0) { 1016 mutex_unlock(&data->mutex); 1017 return ret; 1018 } 1019 if (data->motion_trig == trig) 1020 ret = kxcjk1013_setup_any_motion_interrupt(data, state); 1021 else 1022 ret = kxcjk1013_setup_new_data_interrupt(data, state); 1023 if (ret < 0) { 1024 kxcjk1013_set_power_state(data, false); 1025 mutex_unlock(&data->mutex); 1026 return ret; 1027 } 1028 if (data->motion_trig == trig) 1029 data->motion_trigger_on = state; 1030 else 1031 data->dready_trigger_on = state; 1032 1033 mutex_unlock(&data->mutex); 1034 1035 return 0; 1036 } 1037 1038 static const struct iio_trigger_ops kxcjk1013_trigger_ops = { 1039 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state, 1040 .try_reenable = kxcjk1013_trig_try_reen, 1041 .owner = THIS_MODULE, 1042 }; 1043 1044 static irqreturn_t kxcjk1013_event_handler(int irq, void *private) 1045 { 1046 struct iio_dev *indio_dev = private; 1047 struct kxcjk1013_data *data = iio_priv(indio_dev); 1048 int ret; 1049 1050 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1); 1051 if (ret < 0) { 1052 dev_err(&data->client->dev, "Error reading reg_int_src1\n"); 1053 goto ack_intr; 1054 } 1055 1056 if (ret & 0x02) { 1057 ret = i2c_smbus_read_byte_data(data->client, 1058 KXCJK1013_REG_INT_SRC2); 1059 if (ret < 0) { 1060 dev_err(&data->client->dev, 1061 "Error reading reg_int_src2\n"); 1062 goto ack_intr; 1063 } 1064 1065 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN) 1066 iio_push_event(indio_dev, 1067 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1068 0, 1069 IIO_MOD_X, 1070 IIO_EV_TYPE_THRESH, 1071 IIO_EV_DIR_FALLING), 1072 data->timestamp); 1073 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP) 1074 iio_push_event(indio_dev, 1075 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1076 0, 1077 IIO_MOD_X, 1078 IIO_EV_TYPE_THRESH, 1079 IIO_EV_DIR_RISING), 1080 data->timestamp); 1081 1082 1083 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN) 1084 iio_push_event(indio_dev, 1085 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1086 0, 1087 IIO_MOD_Y, 1088 IIO_EV_TYPE_THRESH, 1089 IIO_EV_DIR_FALLING), 1090 data->timestamp); 1091 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP) 1092 iio_push_event(indio_dev, 1093 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1094 0, 1095 IIO_MOD_Y, 1096 IIO_EV_TYPE_THRESH, 1097 IIO_EV_DIR_RISING), 1098 data->timestamp); 1099 1100 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN) 1101 iio_push_event(indio_dev, 1102 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1103 0, 1104 IIO_MOD_Z, 1105 IIO_EV_TYPE_THRESH, 1106 IIO_EV_DIR_FALLING), 1107 data->timestamp); 1108 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP) 1109 iio_push_event(indio_dev, 1110 IIO_MOD_EVENT_CODE(IIO_ACCEL, 1111 0, 1112 IIO_MOD_Z, 1113 IIO_EV_TYPE_THRESH, 1114 IIO_EV_DIR_RISING), 1115 data->timestamp); 1116 } 1117 1118 ack_intr: 1119 if (data->dready_trigger_on) 1120 return IRQ_HANDLED; 1121 1122 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL); 1123 if (ret < 0) 1124 dev_err(&data->client->dev, "Error reading reg_int_rel\n"); 1125 1126 return IRQ_HANDLED; 1127 } 1128 1129 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private) 1130 { 1131 struct iio_dev *indio_dev = private; 1132 struct kxcjk1013_data *data = iio_priv(indio_dev); 1133 1134 data->timestamp = iio_get_time_ns(); 1135 1136 if (data->dready_trigger_on) 1137 iio_trigger_poll(data->dready_trig); 1138 else if (data->motion_trigger_on) 1139 iio_trigger_poll(data->motion_trig); 1140 1141 if (data->ev_enable_state) 1142 return IRQ_WAKE_THREAD; 1143 else 1144 return IRQ_HANDLED; 1145 } 1146 1147 static const char *kxcjk1013_match_acpi_device(struct device *dev, 1148 enum kx_chipset *chipset, 1149 bool *is_smo8500_device) 1150 { 1151 const struct acpi_device_id *id; 1152 1153 id = acpi_match_device(dev->driver->acpi_match_table, dev); 1154 if (!id) 1155 return NULL; 1156 1157 if (strcmp(id->id, "SMO8500") == 0) 1158 *is_smo8500_device = true; 1159 1160 *chipset = (enum kx_chipset)id->driver_data; 1161 1162 return dev_name(dev); 1163 } 1164 1165 static int kxcjk1013_gpio_probe(struct i2c_client *client, 1166 struct kxcjk1013_data *data) 1167 { 1168 struct device *dev; 1169 struct gpio_desc *gpio; 1170 int ret; 1171 1172 if (!client) 1173 return -EINVAL; 1174 1175 if (data->is_smo8500_device) 1176 return -ENOTSUPP; 1177 1178 dev = &client->dev; 1179 1180 /* data ready gpio interrupt pin */ 1181 gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0, GPIOD_IN); 1182 if (IS_ERR(gpio)) { 1183 dev_err(dev, "acpi gpio get index failed\n"); 1184 return PTR_ERR(gpio); 1185 } 1186 1187 ret = gpiod_to_irq(gpio); 1188 1189 dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); 1190 1191 return ret; 1192 } 1193 1194 static int kxcjk1013_probe(struct i2c_client *client, 1195 const struct i2c_device_id *id) 1196 { 1197 struct kxcjk1013_data *data; 1198 struct iio_dev *indio_dev; 1199 struct kxcjk_1013_platform_data *pdata; 1200 const char *name; 1201 int ret; 1202 1203 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 1204 if (!indio_dev) 1205 return -ENOMEM; 1206 1207 data = iio_priv(indio_dev); 1208 i2c_set_clientdata(client, indio_dev); 1209 data->client = client; 1210 1211 pdata = dev_get_platdata(&client->dev); 1212 if (pdata) 1213 data->active_high_intr = pdata->active_high_intr; 1214 else 1215 data->active_high_intr = true; /* default polarity */ 1216 1217 if (id) { 1218 data->chipset = (enum kx_chipset)(id->driver_data); 1219 name = id->name; 1220 } else if (ACPI_HANDLE(&client->dev)) { 1221 name = kxcjk1013_match_acpi_device(&client->dev, 1222 &data->chipset, 1223 &data->is_smo8500_device); 1224 } else 1225 return -ENODEV; 1226 1227 ret = kxcjk1013_chip_init(data); 1228 if (ret < 0) 1229 return ret; 1230 1231 mutex_init(&data->mutex); 1232 1233 indio_dev->dev.parent = &client->dev; 1234 indio_dev->channels = kxcjk1013_channels; 1235 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels); 1236 indio_dev->name = name; 1237 indio_dev->modes = INDIO_DIRECT_MODE; 1238 indio_dev->info = &kxcjk1013_info; 1239 1240 if (client->irq < 0) 1241 client->irq = kxcjk1013_gpio_probe(client, data); 1242 1243 if (client->irq > 0) { 1244 ret = devm_request_threaded_irq(&client->dev, client->irq, 1245 kxcjk1013_data_rdy_trig_poll, 1246 kxcjk1013_event_handler, 1247 IRQF_TRIGGER_RISING, 1248 KXCJK1013_IRQ_NAME, 1249 indio_dev); 1250 if (ret) 1251 goto err_poweroff; 1252 1253 data->dready_trig = devm_iio_trigger_alloc(&client->dev, 1254 "%s-dev%d", 1255 indio_dev->name, 1256 indio_dev->id); 1257 if (!data->dready_trig) { 1258 ret = -ENOMEM; 1259 goto err_poweroff; 1260 } 1261 1262 data->motion_trig = devm_iio_trigger_alloc(&client->dev, 1263 "%s-any-motion-dev%d", 1264 indio_dev->name, 1265 indio_dev->id); 1266 if (!data->motion_trig) { 1267 ret = -ENOMEM; 1268 goto err_poweroff; 1269 } 1270 1271 data->dready_trig->dev.parent = &client->dev; 1272 data->dready_trig->ops = &kxcjk1013_trigger_ops; 1273 iio_trigger_set_drvdata(data->dready_trig, indio_dev); 1274 indio_dev->trig = data->dready_trig; 1275 iio_trigger_get(indio_dev->trig); 1276 ret = iio_trigger_register(data->dready_trig); 1277 if (ret) 1278 goto err_poweroff; 1279 1280 data->motion_trig->dev.parent = &client->dev; 1281 data->motion_trig->ops = &kxcjk1013_trigger_ops; 1282 iio_trigger_set_drvdata(data->motion_trig, indio_dev); 1283 ret = iio_trigger_register(data->motion_trig); 1284 if (ret) { 1285 data->motion_trig = NULL; 1286 goto err_trigger_unregister; 1287 } 1288 } 1289 1290 ret = iio_triggered_buffer_setup(indio_dev, 1291 &iio_pollfunc_store_time, 1292 kxcjk1013_trigger_handler, 1293 &kxcjk1013_buffer_setup_ops); 1294 if (ret < 0) { 1295 dev_err(&client->dev, "iio triggered buffer setup failed\n"); 1296 goto err_trigger_unregister; 1297 } 1298 1299 ret = iio_device_register(indio_dev); 1300 if (ret < 0) { 1301 dev_err(&client->dev, "unable to register iio device\n"); 1302 goto err_buffer_cleanup; 1303 } 1304 1305 ret = pm_runtime_set_active(&client->dev); 1306 if (ret) 1307 goto err_iio_unregister; 1308 1309 pm_runtime_enable(&client->dev); 1310 pm_runtime_set_autosuspend_delay(&client->dev, 1311 KXCJK1013_SLEEP_DELAY_MS); 1312 pm_runtime_use_autosuspend(&client->dev); 1313 1314 return 0; 1315 1316 err_iio_unregister: 1317 iio_device_unregister(indio_dev); 1318 err_buffer_cleanup: 1319 if (data->dready_trig) 1320 iio_triggered_buffer_cleanup(indio_dev); 1321 err_trigger_unregister: 1322 if (data->dready_trig) 1323 iio_trigger_unregister(data->dready_trig); 1324 if (data->motion_trig) 1325 iio_trigger_unregister(data->motion_trig); 1326 err_poweroff: 1327 kxcjk1013_set_mode(data, STANDBY); 1328 1329 return ret; 1330 } 1331 1332 static int kxcjk1013_remove(struct i2c_client *client) 1333 { 1334 struct iio_dev *indio_dev = i2c_get_clientdata(client); 1335 struct kxcjk1013_data *data = iio_priv(indio_dev); 1336 1337 pm_runtime_disable(&client->dev); 1338 pm_runtime_set_suspended(&client->dev); 1339 pm_runtime_put_noidle(&client->dev); 1340 1341 iio_device_unregister(indio_dev); 1342 1343 if (data->dready_trig) { 1344 iio_triggered_buffer_cleanup(indio_dev); 1345 iio_trigger_unregister(data->dready_trig); 1346 iio_trigger_unregister(data->motion_trig); 1347 } 1348 1349 mutex_lock(&data->mutex); 1350 kxcjk1013_set_mode(data, STANDBY); 1351 mutex_unlock(&data->mutex); 1352 1353 return 0; 1354 } 1355 1356 #ifdef CONFIG_PM_SLEEP 1357 static int kxcjk1013_suspend(struct device *dev) 1358 { 1359 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1360 struct kxcjk1013_data *data = iio_priv(indio_dev); 1361 int ret; 1362 1363 mutex_lock(&data->mutex); 1364 ret = kxcjk1013_set_mode(data, STANDBY); 1365 mutex_unlock(&data->mutex); 1366 1367 return ret; 1368 } 1369 1370 static int kxcjk1013_resume(struct device *dev) 1371 { 1372 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1373 struct kxcjk1013_data *data = iio_priv(indio_dev); 1374 int ret = 0; 1375 1376 mutex_lock(&data->mutex); 1377 ret = kxcjk1013_set_mode(data, OPERATION); 1378 mutex_unlock(&data->mutex); 1379 1380 return ret; 1381 } 1382 #endif 1383 1384 #ifdef CONFIG_PM 1385 static int kxcjk1013_runtime_suspend(struct device *dev) 1386 { 1387 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1388 struct kxcjk1013_data *data = iio_priv(indio_dev); 1389 int ret; 1390 1391 ret = kxcjk1013_set_mode(data, STANDBY); 1392 if (ret < 0) { 1393 dev_err(&data->client->dev, "powering off device failed\n"); 1394 return -EAGAIN; 1395 } 1396 return 0; 1397 } 1398 1399 static int kxcjk1013_runtime_resume(struct device *dev) 1400 { 1401 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 1402 struct kxcjk1013_data *data = iio_priv(indio_dev); 1403 int ret; 1404 int sleep_val; 1405 1406 ret = kxcjk1013_set_mode(data, OPERATION); 1407 if (ret < 0) 1408 return ret; 1409 1410 sleep_val = kxcjk1013_get_startup_times(data); 1411 if (sleep_val < 20000) 1412 usleep_range(sleep_val, 20000); 1413 else 1414 msleep_interruptible(sleep_val/1000); 1415 1416 return 0; 1417 } 1418 #endif 1419 1420 static const struct dev_pm_ops kxcjk1013_pm_ops = { 1421 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume) 1422 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend, 1423 kxcjk1013_runtime_resume, NULL) 1424 }; 1425 1426 static const struct acpi_device_id kx_acpi_match[] = { 1427 {"KXCJ1013", KXCJK1013}, 1428 {"KXCJ1008", KXCJ91008}, 1429 {"KXCJ9000", KXCJ91008}, 1430 {"KXTJ1009", KXTJ21009}, 1431 {"SMO8500", KXCJ91008}, 1432 { }, 1433 }; 1434 MODULE_DEVICE_TABLE(acpi, kx_acpi_match); 1435 1436 static const struct i2c_device_id kxcjk1013_id[] = { 1437 {"kxcjk1013", KXCJK1013}, 1438 {"kxcj91008", KXCJ91008}, 1439 {"kxtj21009", KXTJ21009}, 1440 {"SMO8500", KXCJ91008}, 1441 {} 1442 }; 1443 1444 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id); 1445 1446 static struct i2c_driver kxcjk1013_driver = { 1447 .driver = { 1448 .name = KXCJK1013_DRV_NAME, 1449 .acpi_match_table = ACPI_PTR(kx_acpi_match), 1450 .pm = &kxcjk1013_pm_ops, 1451 }, 1452 .probe = kxcjk1013_probe, 1453 .remove = kxcjk1013_remove, 1454 .id_table = kxcjk1013_id, 1455 }; 1456 module_i2c_driver(kxcjk1013_driver); 1457 1458 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); 1459 MODULE_LICENSE("GPL v2"); 1460 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver"); 1461