drivers/iio/accel/kxcjk-1013.c

   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/pm.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/iio/iio.h>
  26 #include <linux/iio/sysfs.h>
  27 #include <linux/iio/buffer.h>
  28 #include <linux/iio/trigger.h>
  29 #include <linux/iio/events.h>
  30 #include <linux/iio/trigger_consumer.h>
  31 #include <linux/iio/triggered_buffer.h>
  32 #include <linux/iio/accel/kxcjk_1013.h>
  33
  34 #define KXCJK1013_DRV_NAME "kxcjk1013"
  35 #define KXCJK1013_IRQ_NAME "kxcjk1013_event"
  36
  37 #define KXCJK1013_REG_XOUT_L            0x06
  38 /*
  39  * From low byte X axis register, all the other addresses of Y and Z can be
  40  * obtained by just applying axis offset. The following axis defines are just
  41  * provide clarity, but not used.
  42  */
  43 #define KXCJK1013_REG_XOUT_H            0x07
  44 #define KXCJK1013_REG_YOUT_L            0x08
  45 #define KXCJK1013_REG_YOUT_H            0x09
  46 #define KXCJK1013_REG_ZOUT_L            0x0A
  47 #define KXCJK1013_REG_ZOUT_H            0x0B
  48
  49 #define KXCJK1013_REG_DCST_RESP         0x0C
  50 #define KXCJK1013_REG_WHO_AM_I          0x0F
  51 #define KXCJK1013_REG_INT_SRC1          0x16
  52 #define KXCJK1013_REG_INT_SRC2          0x17
  53 #define KXCJK1013_REG_STATUS_REG        0x18
  54 #define KXCJK1013_REG_INT_REL           0x1A
  55 #define KXCJK1013_REG_CTRL1             0x1B
  56 #define KXCJK1013_REG_CTRL2             0x1D
  57 #define KXCJK1013_REG_INT_CTRL1         0x1E
  58 #define KXCJK1013_REG_INT_CTRL2         0x1F
  59 #define KXCJK1013_REG_DATA_CTRL         0x21
  60 #define KXCJK1013_REG_WAKE_TIMER        0x29
  61 #define KXCJK1013_REG_SELF_TEST         0x3A
  62 #define KXCJK1013_REG_WAKE_THRES        0x6A
  63
  64 #define KXCJK1013_REG_CTRL1_BIT_PC1     BIT(7)
  65 #define KXCJK1013_REG_CTRL1_BIT_RES     BIT(6)
  66 #define KXCJK1013_REG_CTRL1_BIT_DRDY    BIT(5)
  67 #define KXCJK1013_REG_CTRL1_BIT_GSEL1   BIT(4)
  68 #define KXCJK1013_REG_CTRL1_BIT_GSEL0   BIT(3)
  69 #define KXCJK1013_REG_CTRL1_BIT_WUFE    BIT(1)
  70 #define KXCJK1013_REG_INT_REG1_BIT_IEA  BIT(4)
  71 #define KXCJK1013_REG_INT_REG1_BIT_IEN  BIT(5)
  72
  73 #define KXCJK1013_DATA_MASK_12_BIT      0x0FFF
  74 #define KXCJK1013_MAX_STARTUP_TIME_US   100000
  75
  76 #define KXCJK1013_SLEEP_DELAY_MS        2000
  77
  78 #define KXCJK1013_REG_INT_SRC2_BIT_ZP   BIT(0)
  79 #define KXCJK1013_REG_INT_SRC2_BIT_ZN   BIT(1)
  80 #define KXCJK1013_REG_INT_SRC2_BIT_YP   BIT(2)
  81 #define KXCJK1013_REG_INT_SRC2_BIT_YN   BIT(3)
  82 #define KXCJK1013_REG_INT_SRC2_BIT_XP   BIT(4)
  83 #define KXCJK1013_REG_INT_SRC2_BIT_XN   BIT(5)
  84
  85 #define KXCJK1013_DEFAULT_WAKE_THRES    1
  86
  87 enum kx_chipset {
  88         KXCJK1013,
  89         KXCJ91008,
  90         KXTJ21009,
  91         KX_MAX_CHIPS /* this must be last */
  92 };
  93
  94 enum kx_acpi_type {
  95         ACPI_GENERIC,
  96         ACPI_SMO8500,
  97 };
  98
  99 enum kxcjk1013_axis {
 100         AXIS_X,
 101         AXIS_Y,
 102         AXIS_Z,
 103         AXIS_MAX
 104 };
 105
 106 struct kxcjk1013_data {
 107         struct i2c_client *client;
 108         struct iio_trigger *dready_trig;
 109         struct iio_trigger *motion_trig;
 110         struct mutex mutex;
 111         /* Ensure timestamp naturally aligned */
 112         struct {
 113                 s16 chans[AXIS_MAX];
 114                 s64 timestamp __aligned(8);
 115         } scan;
 116         u8 odr_bits;
 117         u8 range;
 118         int wake_thres;
 119         int wake_dur;
 120         bool active_high_intr;
 121         bool dready_trigger_on;
 122         int ev_enable_state;
 123         bool motion_trigger_on;
 124         int64_t timestamp;
 125         enum kx_chipset chipset;
 126         enum kx_acpi_type acpi_type;
 127 };
 128
 129 enum kxcjk1013_mode {
 130         STANDBY,
 131         OPERATION,
 132 };
 133
 134 enum kxcjk1013_range {
 135         KXCJK1013_RANGE_2G,
 136         KXCJK1013_RANGE_4G,
 137         KXCJK1013_RANGE_8G,
 138 };
 139
 140 static const struct {
 141         int val;
 142         int val2;
 143         int odr_bits;
 144 } samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
 145                         {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0},
 146                         {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
 147                         {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
 148                         {1600, 0, 0x07} };
 149
 150 /* Refer to section 4 of the specification */
 151 static const struct {
 152         int odr_bits;
 153         int usec;
 154 } odr_start_up_times[KX_MAX_CHIPS][12] = {
 155         /* KXCJK-1013 */
 156         {
 157                 {0x08, 100000},
 158                 {0x09, 100000},
 159                 {0x0A, 100000},
 160                 {0x0B, 100000},
 161                 {0, 80000},
 162                 {0x01, 41000},
 163                 {0x02, 21000},
 164                 {0x03, 11000},
 165                 {0x04, 6400},
 166                 {0x05, 3900},
 167                 {0x06, 2700},
 168                 {0x07, 2100},
 169         },
 170         /* KXCJ9-1008 */
 171         {
 172                 {0x08, 100000},
 173                 {0x09, 100000},
 174                 {0x0A, 100000},
 175                 {0x0B, 100000},
 176                 {0, 80000},
 177                 {0x01, 41000},
 178                 {0x02, 21000},
 179                 {0x03, 11000},
 180                 {0x04, 6400},
 181                 {0x05, 3900},
 182                 {0x06, 2700},
 183                 {0x07, 2100},
 184         },
 185         /* KXCTJ2-1009 */
 186         {
 187                 {0x08, 1240000},
 188                 {0x09, 621000},
 189                 {0x0A, 309000},
 190                 {0x0B, 151000},
 191                 {0, 80000},
 192                 {0x01, 41000},
 193                 {0x02, 21000},
 194                 {0x03, 11000},
 195                 {0x04, 6000},
 196                 {0x05, 4000},
 197                 {0x06, 3000},
 198                 {0x07, 2000},
 199         },
 200 };
 201
 202 static const struct {
 203         u16 scale;
 204         u8 gsel_0;
 205         u8 gsel_1;
 206 } KXCJK1013_scale_table[] = { {9582, 0, 0},
 207                               {19163, 1, 0},
 208                               {38326, 0, 1} };
 209
 210 static const struct {
 211         int val;
 212         int val2;
 213         int odr_bits;
 214 } wake_odr_data_rate_table[] = { {0, 781000, 0x00},
 215                                  {1, 563000, 0x01},
 216                                  {3, 125000, 0x02},
 217                                  {6, 250000, 0x03},
 218                                  {12, 500000, 0x04},
 219                                  {25, 0, 0x05},
 220                                  {50, 0, 0x06},
 221                                  {100, 0, 0x06},
 222                                  {200, 0, 0x06},
 223                                  {400, 0, 0x06},
 224                                  {800, 0, 0x06},
 225                                  {1600, 0, 0x06} };
 226
 227 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
 228                               enum kxcjk1013_mode mode)
 229 {
 230         int ret;
 231
 232         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 233         if (ret < 0) {
 234                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 235                 return ret;
 236         }
 237
 238         if (mode == STANDBY)
 239                 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
 240         else
 241                 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
 242
 243         ret = i2c_smbus_write_byte_data(data->client,
 244                                         KXCJK1013_REG_CTRL1, ret);
 245         if (ret < 0) {
 246                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 247                 return ret;
 248         }
 249
 250         return 0;
 251 }
 252
 253 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
 254                               enum kxcjk1013_mode *mode)
 255 {
 256         int ret;
 257
 258         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 259         if (ret < 0) {
 260                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 261                 return ret;
 262         }
 263
 264         if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
 265                 *mode = OPERATION;
 266         else
 267                 *mode = STANDBY;
 268
 269         return 0;
 270 }
 271
 272 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
 273 {
 274         int ret;
 275
 276         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 277         if (ret < 0) {
 278                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 279                 return ret;
 280         }
 281
 282         ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
 283                  KXCJK1013_REG_CTRL1_BIT_GSEL1);
 284         ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
 285         ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
 286
 287         ret = i2c_smbus_write_byte_data(data->client,
 288                                         KXCJK1013_REG_CTRL1,
 289                                         ret);
 290         if (ret < 0) {
 291                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 292                 return ret;
 293         }
 294
 295         data->range = range_index;
 296
 297         return 0;
 298 }
 299
 300 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
 301 {
 302         int ret;
 303
 304         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
 305         if (ret < 0) {
 306                 dev_err(&data->client->dev, "Error reading who_am_i\n");
 307                 return ret;
 308         }
 309
 310         dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
 311
 312         ret = kxcjk1013_set_mode(data, STANDBY);
 313         if (ret < 0)
 314                 return ret;
 315
 316         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 317         if (ret < 0) {
 318                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 319                 return ret;
 320         }
 321
 322         /* Set 12 bit mode */
 323         ret |= KXCJK1013_REG_CTRL1_BIT_RES;
 324
 325         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
 326                                         ret);
 327         if (ret < 0) {
 328                 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
 329                 return ret;
 330         }
 331
 332         /* Setting range to 4G */
 333         ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
 334         if (ret < 0)
 335                 return ret;
 336
 337         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
 338         if (ret < 0) {
 339                 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
 340                 return ret;
 341         }
 342
 343         data->odr_bits = ret;
 344
 345         /* Set up INT polarity */
 346         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
 347         if (ret < 0) {
 348                 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
 349                 return ret;
 350         }
 351
 352         if (data->active_high_intr)
 353                 ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
 354         else
 355                 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
 356
 357         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
 358                                         ret);
 359         if (ret < 0) {
 360                 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
 361                 return ret;
 362         }
 363
 364         ret = kxcjk1013_set_mode(data, OPERATION);
 365         if (ret < 0)
 366                 return ret;
 367
 368         data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
 369
 370         return 0;
 371 }
 372
 373 #ifdef CONFIG_PM
 374 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
 375 {
 376         int i;
 377         int idx = data->chipset;
 378
 379         for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
 380                 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
 381                         return odr_start_up_times[idx][i].usec;
 382         }
 383
 384         return KXCJK1013_MAX_STARTUP_TIME_US;
 385 }
 386 #endif
 387
 388 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
 389 {
 390 #ifdef CONFIG_PM
 391         int ret;
 392
 393         if (on)
 394                 ret = pm_runtime_get_sync(&data->client->dev);
 395         else {
 396                 pm_runtime_mark_last_busy(&data->client->dev);
 397                 ret = pm_runtime_put_autosuspend(&data->client->dev);
 398         }
 399         if (ret < 0) {
 400                 dev_err(&data->client->dev,
 401                         "Failed: kxcjk1013_set_power_state for %d\n", on);
 402                 if (on)
 403                         pm_runtime_put_noidle(&data->client->dev);
 404                 return ret;
 405         }
 406 #endif
 407
 408         return 0;
 409 }
 410
 411 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
 412 {
 413         int ret;
 414
 415         ret = i2c_smbus_write_byte_data(data->client,
 416                                         KXCJK1013_REG_WAKE_TIMER,
 417                                         data->wake_dur);
 418         if (ret < 0) {
 419                 dev_err(&data->client->dev,
 420                         "Error writing reg_wake_timer\n");
 421                 return ret;
 422         }
 423
 424         ret = i2c_smbus_write_byte_data(data->client,
 425                                         KXCJK1013_REG_WAKE_THRES,
 426                                         data->wake_thres);
 427         if (ret < 0) {
 428                 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
 429                 return ret;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
 436                                                 bool status)
 437 {
 438         int ret;
 439         enum kxcjk1013_mode store_mode;
 440
 441         ret = kxcjk1013_get_mode(data, &store_mode);
 442         if (ret < 0)
 443                 return ret;
 444
 445         /* This is requirement by spec to change state to STANDBY */
 446         ret = kxcjk1013_set_mode(data, STANDBY);
 447         if (ret < 0)
 448                 return ret;
 449
 450         ret = kxcjk1013_chip_update_thresholds(data);
 451         if (ret < 0)
 452                 return ret;
 453
 454         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
 455         if (ret < 0) {
 456                 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
 457                 return ret;
 458         }
 459
 460         if (status)
 461                 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
 462         else
 463                 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
 464
 465         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
 466                                         ret);
 467         if (ret < 0) {
 468                 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
 469                 return ret;
 470         }
 471
 472         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 473         if (ret < 0) {
 474                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 475                 return ret;
 476         }
 477
 478         if (status)
 479                 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
 480         else
 481                 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
 482
 483         ret = i2c_smbus_write_byte_data(data->client,
 484                                         KXCJK1013_REG_CTRL1, ret);
 485         if (ret < 0) {
 486                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 487                 return ret;
 488         }
 489
 490         if (store_mode == OPERATION) {
 491                 ret = kxcjk1013_set_mode(data, OPERATION);
 492                 if (ret < 0)
 493                         return ret;
 494         }
 495
 496         return 0;
 497 }
 498
 499 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
 500                                               bool status)
 501 {
 502         int ret;
 503         enum kxcjk1013_mode store_mode;
 504
 505         ret = kxcjk1013_get_mode(data, &store_mode);
 506         if (ret < 0)
 507                 return ret;
 508
 509         /* This is requirement by spec to change state to STANDBY */
 510         ret = kxcjk1013_set_mode(data, STANDBY);
 511         if (ret < 0)
 512                 return ret;
 513
 514         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
 515         if (ret < 0) {
 516                 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
 517                 return ret;
 518         }
 519
 520         if (status)
 521                 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
 522         else
 523                 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
 524
 525         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
 526                                         ret);
 527         if (ret < 0) {
 528                 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
 529                 return ret;
 530         }
 531
 532         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 533         if (ret < 0) {
 534                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 535                 return ret;
 536         }
 537
 538         if (status)
 539                 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
 540         else
 541                 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
 542
 543         ret = i2c_smbus_write_byte_data(data->client,
 544                                         KXCJK1013_REG_CTRL1, ret);
 545         if (ret < 0) {
 546                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 547                 return ret;
 548         }
 549
 550         if (store_mode == OPERATION) {
 551                 ret = kxcjk1013_set_mode(data, OPERATION);
 552                 if (ret < 0)
 553                         return ret;
 554         }
 555
 556         return 0;
 557 }
 558
 559 static int kxcjk1013_convert_freq_to_bit(int val, int val2)
 560 {
 561         int i;
 562
 563         for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
 564                 if (samp_freq_table[i].val == val &&
 565                         samp_freq_table[i].val2 == val2) {
 566                         return samp_freq_table[i].odr_bits;
 567                 }
 568         }
 569
 570         return -EINVAL;
 571 }
 572
 573 static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2)
 574 {
 575         int i;
 576
 577         for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) {
 578                 if (wake_odr_data_rate_table[i].val == val &&
 579                         wake_odr_data_rate_table[i].val2 == val2) {
 580                         return wake_odr_data_rate_table[i].odr_bits;
 581                 }
 582         }
 583
 584         return -EINVAL;
 585 }
 586
 587 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
 588 {
 589         int ret;
 590         int odr_bits;
 591         enum kxcjk1013_mode store_mode;
 592
 593         ret = kxcjk1013_get_mode(data, &store_mode);
 594         if (ret < 0)
 595                 return ret;
 596
 597         odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
 598         if (odr_bits < 0)
 599                 return odr_bits;
 600
 601         /* To change ODR, the chip must be set to STANDBY as per spec */
 602         ret = kxcjk1013_set_mode(data, STANDBY);
 603         if (ret < 0)
 604                 return ret;
 605
 606         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
 607                                         odr_bits);
 608         if (ret < 0) {
 609                 dev_err(&data->client->dev, "Error writing data_ctrl\n");
 610                 return ret;
 611         }
 612
 613         data->odr_bits = odr_bits;
 614
 615         odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2);
 616         if (odr_bits < 0)
 617                 return odr_bits;
 618
 619         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
 620                                         odr_bits);
 621         if (ret < 0) {
 622                 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
 623                 return ret;
 624         }
 625
 626         if (store_mode == OPERATION) {
 627                 ret = kxcjk1013_set_mode(data, OPERATION);
 628                 if (ret < 0)
 629                         return ret;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
 636 {
 637         int i;
 638
 639         for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
 640                 if (samp_freq_table[i].odr_bits == data->odr_bits) {
 641                         *val = samp_freq_table[i].val;
 642                         *val2 = samp_freq_table[i].val2;
 643                         return IIO_VAL_INT_PLUS_MICRO;
 644                 }
 645         }
 646
 647         return -EINVAL;
 648 }
 649
 650 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
 651 {
 652         u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
 653         int ret;
 654
 655         ret = i2c_smbus_read_word_data(data->client, reg);
 656         if (ret < 0) {
 657                 dev_err(&data->client->dev,
 658                         "failed to read accel_%c registers\n", 'x' + axis);
 659                 return ret;
 660         }
 661
 662         return ret;
 663 }
 664
 665 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
 666 {
 667         int ret, i;
 668         enum kxcjk1013_mode store_mode;
 669
 670         for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
 671                 if (KXCJK1013_scale_table[i].scale == val) {
 672                         ret = kxcjk1013_get_mode(data, &store_mode);
 673                         if (ret < 0)
 674                                 return ret;
 675
 676                         ret = kxcjk1013_set_mode(data, STANDBY);
 677                         if (ret < 0)
 678                                 return ret;
 679
 680                         ret = kxcjk1013_set_range(data, i);
 681                         if (ret < 0)
 682                                 return ret;
 683
 684                         if (store_mode == OPERATION) {
 685                                 ret = kxcjk1013_set_mode(data, OPERATION);
 686                                 if (ret)
 687                                         return ret;
 688                         }
 689
 690                         return 0;
 691                 }
 692         }
 693
 694         return -EINVAL;
 695 }
 696
 697 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
 698                               struct iio_chan_spec const *chan, int *val,
 699                               int *val2, long mask)
 700 {
 701         struct kxcjk1013_data *data = iio_priv(indio_dev);
 702         int ret;
 703
 704         switch (mask) {
 705         case IIO_CHAN_INFO_RAW:
 706                 mutex_lock(&data->mutex);
 707                 if (iio_buffer_enabled(indio_dev))
 708                         ret = -EBUSY;
 709                 else {
 710                         ret = kxcjk1013_set_power_state(data, true);
 711                         if (ret < 0) {
 712                                 mutex_unlock(&data->mutex);
 713                                 return ret;
 714                         }
 715                         ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
 716                         if (ret < 0) {
 717                                 kxcjk1013_set_power_state(data, false);
 718                                 mutex_unlock(&data->mutex);
 719                                 return ret;
 720                         }
 721                         *val = sign_extend32(ret >> 4, 11);
 722                         ret = kxcjk1013_set_power_state(data, false);
 723                 }
 724                 mutex_unlock(&data->mutex);
 725
 726                 if (ret < 0)
 727                         return ret;
 728
 729                 return IIO_VAL_INT;
 730
 731         case IIO_CHAN_INFO_SCALE:
 732                 *val = 0;
 733                 *val2 = KXCJK1013_scale_table[data->range].scale;
 734                 return IIO_VAL_INT_PLUS_MICRO;
 735
 736         case IIO_CHAN_INFO_SAMP_FREQ:
 737                 mutex_lock(&data->mutex);
 738                 ret = kxcjk1013_get_odr(data, val, val2);
 739                 mutex_unlock(&data->mutex);
 740                 return ret;
 741
 742         default:
 743                 return -EINVAL;
 744         }
 745 }
 746
 747 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
 748                                struct iio_chan_spec const *chan, int val,
 749                                int val2, long mask)
 750 {
 751         struct kxcjk1013_data *data = iio_priv(indio_dev);
 752         int ret;
 753
 754         switch (mask) {
 755         case IIO_CHAN_INFO_SAMP_FREQ:
 756                 mutex_lock(&data->mutex);
 757                 ret = kxcjk1013_set_odr(data, val, val2);
 758                 mutex_unlock(&data->mutex);
 759                 break;
 760         case IIO_CHAN_INFO_SCALE:
 761                 if (val)
 762                         return -EINVAL;
 763
 764                 mutex_lock(&data->mutex);
 765                 ret = kxcjk1013_set_scale(data, val2);
 766                 mutex_unlock(&data->mutex);
 767                 break;
 768         default:
 769                 ret = -EINVAL;
 770         }
 771
 772         return ret;
 773 }
 774
 775 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
 776                                    const struct iio_chan_spec *chan,
 777                                    enum iio_event_type type,
 778                                    enum iio_event_direction dir,
 779                                    enum iio_event_info info,
 780                                    int *val, int *val2)
 781 {
 782         struct kxcjk1013_data *data = iio_priv(indio_dev);
 783
 784         *val2 = 0;
 785         switch (info) {
 786         case IIO_EV_INFO_VALUE:
 787                 *val = data->wake_thres;
 788                 break;
 789         case IIO_EV_INFO_PERIOD:
 790                 *val = data->wake_dur;
 791                 break;
 792         default:
 793                 return -EINVAL;
 794         }
 795
 796         return IIO_VAL_INT;
 797 }
 798
 799 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
 800                                     const struct iio_chan_spec *chan,
 801                                     enum iio_event_type type,
 802                                     enum iio_event_direction dir,
 803                                     enum iio_event_info info,
 804                                     int val, int val2)
 805 {
 806         struct kxcjk1013_data *data = iio_priv(indio_dev);
 807
 808         if (data->ev_enable_state)
 809                 return -EBUSY;
 810
 811         switch (info) {
 812         case IIO_EV_INFO_VALUE:
 813                 data->wake_thres = val;
 814                 break;
 815         case IIO_EV_INFO_PERIOD:
 816                 data->wake_dur = val;
 817                 break;
 818         default:
 819                 return -EINVAL;
 820         }
 821
 822         return 0;
 823 }
 824
 825 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
 826                                           const struct iio_chan_spec *chan,
 827                                           enum iio_event_type type,
 828                                           enum iio_event_direction dir)
 829 {
 830         struct kxcjk1013_data *data = iio_priv(indio_dev);
 831
 832         return data->ev_enable_state;
 833 }
 834
 835 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
 836                                            const struct iio_chan_spec *chan,
 837                                            enum iio_event_type type,
 838                                            enum iio_event_direction dir,
 839                                            int state)
 840 {
 841         struct kxcjk1013_data *data = iio_priv(indio_dev);
 842         int ret;
 843
 844         if (state && data->ev_enable_state)
 845                 return 0;
 846
 847         mutex_lock(&data->mutex);
 848
 849         if (!state && data->motion_trigger_on) {
 850                 data->ev_enable_state = 0;
 851                 mutex_unlock(&data->mutex);
 852                 return 0;
 853         }
 854
 855         /*
 856          * We will expect the enable and disable to do operation in
 857          * in reverse order. This will happen here anyway as our
 858          * resume operation uses sync mode runtime pm calls, the
 859          * suspend operation will be delayed by autosuspend delay
 860          * So the disable operation will still happen in reverse of
 861          * enable operation. When runtime pm is disabled the mode
 862          * is always on so sequence doesn't matter
 863          */
 864         ret = kxcjk1013_set_power_state(data, state);
 865         if (ret < 0) {
 866                 mutex_unlock(&data->mutex);
 867                 return ret;
 868         }
 869
 870         ret =  kxcjk1013_setup_any_motion_interrupt(data, state);
 871         if (ret < 0) {
 872                 kxcjk1013_set_power_state(data, false);
 873                 data->ev_enable_state = 0;
 874                 mutex_unlock(&data->mutex);
 875                 return ret;
 876         }
 877
 878         data->ev_enable_state = state;
 879         mutex_unlock(&data->mutex);
 880
 881         return 0;
 882 }
 883
 884 static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
 885 {
 886         struct kxcjk1013_data *data = iio_priv(indio_dev);
 887
 888         return kxcjk1013_set_power_state(data, true);
 889 }
 890
 891 static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
 892 {
 893         struct kxcjk1013_data *data = iio_priv(indio_dev);
 894
 895         return kxcjk1013_set_power_state(data, false);
 896 }
 897
 898 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
 899         "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
 900
 901 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
 902
 903 static struct attribute *kxcjk1013_attributes[] = {
 904         &iio_const_attr_sampling_frequency_available.dev_attr.attr,
 905         &iio_const_attr_in_accel_scale_available.dev_attr.attr,
 906         NULL,
 907 };
 908
 909 static const struct attribute_group kxcjk1013_attrs_group = {
 910         .attrs = kxcjk1013_attributes,
 911 };
 912
 913 static const struct iio_event_spec kxcjk1013_event = {
 914                 .type = IIO_EV_TYPE_THRESH,
 915                 .dir = IIO_EV_DIR_EITHER,
 916                 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
 917                                  BIT(IIO_EV_INFO_ENABLE) |
 918                                  BIT(IIO_EV_INFO_PERIOD)
 919 };
 920
 921 #define KXCJK1013_CHANNEL(_axis) {                                      \
 922         .type = IIO_ACCEL,                                              \
 923         .modified = 1,                                                  \
 924         .channel2 = IIO_MOD_##_axis,                                    \
 925         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),                   \
 926         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |          \
 927                                 BIT(IIO_CHAN_INFO_SAMP_FREQ),           \
 928         .scan_index = AXIS_##_axis,                                     \
 929         .scan_type = {                                                  \
 930                 .sign = 's',                                            \
 931                 .realbits = 12,                                         \
 932                 .storagebits = 16,                                      \
 933                 .shift = 4,                                             \
 934                 .endianness = IIO_LE,                                   \
 935         },                                                              \
 936         .event_spec = &kxcjk1013_event,                         \
 937         .num_event_specs = 1                                            \
 938 }
 939
 940 static const struct iio_chan_spec kxcjk1013_channels[] = {
 941         KXCJK1013_CHANNEL(X),
 942         KXCJK1013_CHANNEL(Y),
 943         KXCJK1013_CHANNEL(Z),
 944         IIO_CHAN_SOFT_TIMESTAMP(3),
 945 };
 946
 947 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
 948         .preenable              = kxcjk1013_buffer_preenable,
 949         .postenable             = iio_triggered_buffer_postenable,
 950         .postdisable            = kxcjk1013_buffer_postdisable,
 951         .predisable             = iio_triggered_buffer_predisable,
 952 };
 953
 954 static const struct iio_info kxcjk1013_info = {
 955         .attrs                  = &kxcjk1013_attrs_group,
 956         .read_raw               = kxcjk1013_read_raw,
 957         .write_raw              = kxcjk1013_write_raw,
 958         .read_event_value       = kxcjk1013_read_event,
 959         .write_event_value      = kxcjk1013_write_event,
 960         .write_event_config     = kxcjk1013_write_event_config,
 961         .read_event_config      = kxcjk1013_read_event_config,
 962         .driver_module          = THIS_MODULE,
 963 };
 964
 965 static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
 966
 967 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
 968 {
 969         struct iio_poll_func *pf = p;
 970         struct iio_dev *indio_dev = pf->indio_dev;
 971         struct kxcjk1013_data *data = iio_priv(indio_dev);
 972         int ret;
 973
 974         mutex_lock(&data->mutex);
 975         ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
 976                                                         KXCJK1013_REG_XOUT_L,
 977                                                         AXIS_MAX * 2,
 978                                                         (u8 *)data->scan.chans);
 979         mutex_unlock(&data->mutex);
 980         if (ret < 0)
 981                 goto err;
 982
 983         iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
 984                                            data->timestamp);
 985 err:
 986         iio_trigger_notify_done(indio_dev->trig);
 987
 988         return IRQ_HANDLED;
 989 }
 990
 991 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
 992 {
 993         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 994         struct kxcjk1013_data *data = iio_priv(indio_dev);
 995         int ret;
 996
 997         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
 998         if (ret < 0) {
 999                 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1000                 return ret;
1001         }
1002
1003         return 0;
1004 }
1005
1006 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
1007                                                 bool state)
1008 {
1009         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1010         struct kxcjk1013_data *data = iio_priv(indio_dev);
1011         int ret;
1012
1013         mutex_lock(&data->mutex);
1014
1015         if (!state && data->ev_enable_state && data->motion_trigger_on) {
1016                 data->motion_trigger_on = false;
1017                 mutex_unlock(&data->mutex);
1018                 return 0;
1019         }
1020
1021         ret = kxcjk1013_set_power_state(data, state);
1022         if (ret < 0) {
1023                 mutex_unlock(&data->mutex);
1024                 return ret;
1025         }
1026         if (data->motion_trig == trig)
1027                 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1028         else
1029                 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1030         if (ret < 0) {
1031                 kxcjk1013_set_power_state(data, false);
1032                 mutex_unlock(&data->mutex);
1033                 return ret;
1034         }
1035         if (data->motion_trig == trig)
1036                 data->motion_trigger_on = state;
1037         else
1038                 data->dready_trigger_on = state;
1039
1040         mutex_unlock(&data->mutex);
1041
1042         return 0;
1043 }
1044
1045 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1046         .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1047         .try_reenable = kxcjk1013_trig_try_reen,
1048         .owner = THIS_MODULE,
1049 };
1050
1051 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1052 {
1053         struct iio_dev *indio_dev = private;
1054         struct kxcjk1013_data *data = iio_priv(indio_dev);
1055         int ret;
1056
1057         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1058         if (ret < 0) {
1059                 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1060                 goto ack_intr;
1061         }
1062
1063         if (ret & 0x02) {
1064                 ret = i2c_smbus_read_byte_data(data->client,
1065                                                KXCJK1013_REG_INT_SRC2);
1066                 if (ret < 0) {
1067                         dev_err(&data->client->dev,
1068                                 "Error reading reg_int_src2\n");
1069                         goto ack_intr;
1070                 }
1071
1072                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1073                         iio_push_event(indio_dev,
1074                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1075                                        0,
1076                                        IIO_MOD_X,
1077                                        IIO_EV_TYPE_THRESH,
1078                                        IIO_EV_DIR_FALLING),
1079                                        data->timestamp);
1080                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1081                         iio_push_event(indio_dev,
1082                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1083                                        0,
1084                                        IIO_MOD_X,
1085                                        IIO_EV_TYPE_THRESH,
1086                                        IIO_EV_DIR_RISING),
1087                                        data->timestamp);
1088
1089
1090                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1091                         iio_push_event(indio_dev,
1092                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1093                                        0,
1094                                        IIO_MOD_Y,
1095                                        IIO_EV_TYPE_THRESH,
1096                                        IIO_EV_DIR_FALLING),
1097                                        data->timestamp);
1098                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1099                         iio_push_event(indio_dev,
1100                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1101                                        0,
1102                                        IIO_MOD_Y,
1103                                        IIO_EV_TYPE_THRESH,
1104                                        IIO_EV_DIR_RISING),
1105                                        data->timestamp);
1106
1107                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1108                         iio_push_event(indio_dev,
1109                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1110                                        0,
1111                                        IIO_MOD_Z,
1112                                        IIO_EV_TYPE_THRESH,
1113                                        IIO_EV_DIR_FALLING),
1114                                        data->timestamp);
1115                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1116                         iio_push_event(indio_dev,
1117                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1118                                        0,
1119                                        IIO_MOD_Z,
1120                                        IIO_EV_TYPE_THRESH,
1121                                        IIO_EV_DIR_RISING),
1122                                        data->timestamp);
1123         }
1124
1125 ack_intr:
1126         if (data->dready_trigger_on)
1127                 return IRQ_HANDLED;
1128
1129         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1130         if (ret < 0)
1131                 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1132
1133         return IRQ_HANDLED;
1134 }
1135
1136 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1137 {
1138         struct iio_dev *indio_dev = private;
1139         struct kxcjk1013_data *data = iio_priv(indio_dev);
1140
1141         data->timestamp = iio_get_time_ns(indio_dev);
1142
1143         if (data->dready_trigger_on)
1144                 iio_trigger_poll(data->dready_trig);
1145         else if (data->motion_trigger_on)
1146                 iio_trigger_poll(data->motion_trig);
1147
1148         if (data->ev_enable_state)
1149                 return IRQ_WAKE_THREAD;
1150         else
1151                 return IRQ_HANDLED;
1152 }
1153
1154 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1155                                                enum kx_chipset *chipset,
1156                                                enum kx_acpi_type *acpi_type)
1157 {
1158         const struct acpi_device_id *id;
1159
1160         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1161         if (!id)
1162                 return NULL;
1163
1164         if (strcmp(id->id, "SMO8500") == 0)
1165                 *acpi_type = ACPI_SMO8500;
1166
1167         *chipset = (enum kx_chipset)id->driver_data;
1168
1169         return dev_name(dev);
1170 }
1171
1172 static int kxcjk1013_probe(struct i2c_client *client,
1173                            const struct i2c_device_id *id)
1174 {
1175         struct kxcjk1013_data *data;
1176         struct iio_dev *indio_dev;
1177         struct kxcjk_1013_platform_data *pdata;
1178         const char *name;
1179         int ret;
1180
1181         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1182         if (!indio_dev)
1183                 return -ENOMEM;
1184
1185         data = iio_priv(indio_dev);
1186         i2c_set_clientdata(client, indio_dev);
1187         data->client = client;
1188
1189         pdata = dev_get_platdata(&client->dev);
1190         if (pdata)
1191                 data->active_high_intr = pdata->active_high_intr;
1192         else
1193                 data->active_high_intr = true; /* default polarity */
1194
1195         if (id) {
1196                 data->chipset = (enum kx_chipset)(id->driver_data);
1197                 name = id->name;
1198         } else if (ACPI_HANDLE(&client->dev)) {
1199                 name = kxcjk1013_match_acpi_device(&client->dev,
1200                                                    &data->chipset,
1201                                                    &data->acpi_type);
1202         } else
1203                 return -ENODEV;
1204
1205         ret = kxcjk1013_chip_init(data);
1206         if (ret < 0)
1207                 return ret;
1208
1209         mutex_init(&data->mutex);
1210
1211         indio_dev->dev.parent = &client->dev;
1212         indio_dev->channels = kxcjk1013_channels;
1213         indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1214         indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1215         indio_dev->name = name;
1216         indio_dev->modes = INDIO_DIRECT_MODE;
1217         indio_dev->info = &kxcjk1013_info;
1218
1219         if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
1220                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1221                                                 kxcjk1013_data_rdy_trig_poll,
1222                                                 kxcjk1013_event_handler,
1223                                                 IRQF_TRIGGER_RISING,
1224                                                 KXCJK1013_IRQ_NAME,
1225                                                 indio_dev);
1226                 if (ret)
1227                         goto err_poweroff;
1228
1229                 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1230                                                            "%s-dev%d",
1231                                                            indio_dev->name,
1232                                                            indio_dev->id);
1233                 if (!data->dready_trig) {
1234                         ret = -ENOMEM;
1235                         goto err_poweroff;
1236                 }
1237
1238                 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1239                                                           "%s-any-motion-dev%d",
1240                                                           indio_dev->name,
1241                                                           indio_dev->id);
1242                 if (!data->motion_trig) {
1243                         ret = -ENOMEM;
1244                         goto err_poweroff;
1245                 }
1246
1247                 data->dready_trig->dev.parent = &client->dev;
1248                 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1249                 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1250                 indio_dev->trig = data->dready_trig;
1251                 iio_trigger_get(indio_dev->trig);
1252                 ret = iio_trigger_register(data->dready_trig);
1253                 if (ret)
1254                         goto err_poweroff;
1255
1256                 data->motion_trig->dev.parent = &client->dev;
1257                 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1258                 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1259                 ret = iio_trigger_register(data->motion_trig);
1260                 if (ret) {
1261                         data->motion_trig = NULL;
1262                         goto err_trigger_unregister;
1263                 }
1264         }
1265
1266         ret = iio_triggered_buffer_setup(indio_dev,
1267                                          &iio_pollfunc_store_time,
1268                                          kxcjk1013_trigger_handler,
1269                                          &kxcjk1013_buffer_setup_ops);
1270         if (ret < 0) {
1271                 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1272                 goto err_trigger_unregister;
1273         }
1274
1275         ret = pm_runtime_set_active(&client->dev);
1276         if (ret)
1277                 goto err_buffer_cleanup;
1278
1279         pm_runtime_enable(&client->dev);
1280         pm_runtime_set_autosuspend_delay(&client->dev,
1281                                          KXCJK1013_SLEEP_DELAY_MS);
1282         pm_runtime_use_autosuspend(&client->dev);
1283
1284         ret = iio_device_register(indio_dev);
1285         if (ret < 0) {
1286                 dev_err(&client->dev, "unable to register iio device\n");
1287                 goto err_buffer_cleanup;
1288         }
1289
1290         return 0;
1291
1292 err_buffer_cleanup:
1293         if (data->dready_trig)
1294                 iio_triggered_buffer_cleanup(indio_dev);
1295 err_trigger_unregister:
1296         if (data->dready_trig)
1297                 iio_trigger_unregister(data->dready_trig);
1298         if (data->motion_trig)
1299                 iio_trigger_unregister(data->motion_trig);
1300 err_poweroff:
1301         kxcjk1013_set_mode(data, STANDBY);
1302
1303         return ret;
1304 }
1305
1306 static int kxcjk1013_remove(struct i2c_client *client)
1307 {
1308         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1309         struct kxcjk1013_data *data = iio_priv(indio_dev);
1310
1311         iio_device_unregister(indio_dev);
1312
1313         pm_runtime_disable(&client->dev);
1314         pm_runtime_set_suspended(&client->dev);
1315         pm_runtime_put_noidle(&client->dev);
1316
1317         if (data->dready_trig) {
1318                 iio_triggered_buffer_cleanup(indio_dev);
1319                 iio_trigger_unregister(data->dready_trig);
1320                 iio_trigger_unregister(data->motion_trig);
1321         }
1322
1323         mutex_lock(&data->mutex);
1324         kxcjk1013_set_mode(data, STANDBY);
1325         mutex_unlock(&data->mutex);
1326
1327         return 0;
1328 }
1329
1330 #ifdef CONFIG_PM_SLEEP
1331 static int kxcjk1013_suspend(struct device *dev)
1332 {
1333         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1334         struct kxcjk1013_data *data = iio_priv(indio_dev);
1335         int ret;
1336
1337         mutex_lock(&data->mutex);
1338         ret = kxcjk1013_set_mode(data, STANDBY);
1339         mutex_unlock(&data->mutex);
1340
1341         return ret;
1342 }
1343
1344 static int kxcjk1013_resume(struct device *dev)
1345 {
1346         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1347         struct kxcjk1013_data *data = iio_priv(indio_dev);
1348         int ret = 0;
1349
1350         mutex_lock(&data->mutex);
1351         ret = kxcjk1013_set_mode(data, OPERATION);
1352         if (ret == 0)
1353                 ret = kxcjk1013_set_range(data, data->range);
1354         mutex_unlock(&data->mutex);
1355
1356         return ret;
1357 }
1358 #endif
1359
1360 #ifdef CONFIG_PM
1361 static int kxcjk1013_runtime_suspend(struct device *dev)
1362 {
1363         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1364         struct kxcjk1013_data *data = iio_priv(indio_dev);
1365         int ret;
1366
1367         ret = kxcjk1013_set_mode(data, STANDBY);
1368         if (ret < 0) {
1369                 dev_err(&data->client->dev, "powering off device failed\n");
1370                 return -EAGAIN;
1371         }
1372         return 0;
1373 }
1374
1375 static int kxcjk1013_runtime_resume(struct device *dev)
1376 {
1377         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1378         struct kxcjk1013_data *data = iio_priv(indio_dev);
1379         int ret;
1380         int sleep_val;
1381
1382         ret = kxcjk1013_set_mode(data, OPERATION);
1383         if (ret < 0)
1384                 return ret;
1385
1386         sleep_val = kxcjk1013_get_startup_times(data);
1387         if (sleep_val < 20000)
1388                 usleep_range(sleep_val, 20000);
1389         else
1390                 msleep_interruptible(sleep_val/1000);
1391
1392         return 0;
1393 }
1394 #endif
1395
1396 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1397         SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1398         SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1399                            kxcjk1013_runtime_resume, NULL)
1400 };
1401
1402 static const struct acpi_device_id kx_acpi_match[] = {
1403         {"KXCJ1013", KXCJK1013},
1404         {"KXCJ1008", KXCJ91008},
1405         {"KXCJ9000", KXCJ91008},
1406         {"KIOX000A", KXCJ91008},
1407         {"KIOX010A", KXCJ91008}, /* KXCJ91008 inside the display of a 2-in-1 */
1408         {"KXTJ1009", KXTJ21009},
1409         {"SMO8500",  KXCJ91008},
1410         { },
1411 };
1412 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1413
1414 static const struct i2c_device_id kxcjk1013_id[] = {
1415         {"kxcjk1013", KXCJK1013},
1416         {"kxcj91008", KXCJ91008},
1417         {"kxtj21009", KXTJ21009},
1418         {"SMO8500",   KXCJ91008},
1419         {}
1420 };
1421
1422 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1423
1424 static struct i2c_driver kxcjk1013_driver = {
1425         .driver = {
1426                 .name   = KXCJK1013_DRV_NAME,
1427                 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1428                 .pm     = &kxcjk1013_pm_ops,
1429         },
1430         .probe          = kxcjk1013_probe,
1431         .remove         = kxcjk1013_remove,
1432         .id_table       = kxcjk1013_id,
1433 };
1434 module_i2c_driver(kxcjk1013_driver);
1435
1436 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1437 MODULE_LICENSE("GPL v2");
1438 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");