kernel/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/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
 662         for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
 663                 if (KXCJK1013_scale_table[i].scale == val) {
 664
 665                         ret = kxcjk1013_get_mode(data, &store_mode);
 666                         if (ret < 0)
 667                                 return ret;
 668
 669                         ret = kxcjk1013_set_mode(data, STANDBY);
 670                         if (ret < 0)
 671                                 return ret;
 672
 673                         ret = kxcjk1013_set_range(data, i);
 674                         if (ret < 0)
 675                                 return ret;
 676
 677                         if (store_mode == OPERATION) {
 678                                 ret = kxcjk1013_set_mode(data, OPERATION);
 679                                 if (ret)
 680                                         return ret;
 681                         }
 682
 683                         return 0;
 684                 }
 685         }
 686
 687         return -EINVAL;
 688 }
 689
 690 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
 691                               struct iio_chan_spec const *chan, int *val,
 692                               int *val2, long mask)
 693 {
 694         struct kxcjk1013_data *data = iio_priv(indio_dev);
 695         int ret;
 696
 697         switch (mask) {
 698         case IIO_CHAN_INFO_RAW:
 699                 mutex_lock(&data->mutex);
 700                 if (iio_buffer_enabled(indio_dev))
 701                         ret = -EBUSY;
 702                 else {
 703                         ret = kxcjk1013_set_power_state(data, true);
 704                         if (ret < 0) {
 705                                 mutex_unlock(&data->mutex);
 706                                 return ret;
 707                         }
 708                         ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
 709                         if (ret < 0) {
 710                                 kxcjk1013_set_power_state(data, false);
 711                                 mutex_unlock(&data->mutex);
 712                                 return ret;
 713                         }
 714                         *val = sign_extend32(ret >> 4, 11);
 715                         ret = kxcjk1013_set_power_state(data, false);
 716                 }
 717                 mutex_unlock(&data->mutex);
 718
 719                 if (ret < 0)
 720                         return ret;
 721
 722                 return IIO_VAL_INT;
 723
 724         case IIO_CHAN_INFO_SCALE:
 725                 *val = 0;
 726                 *val2 = KXCJK1013_scale_table[data->range].scale;
 727                 return IIO_VAL_INT_PLUS_MICRO;
 728
 729         case IIO_CHAN_INFO_SAMP_FREQ:
 730                 mutex_lock(&data->mutex);
 731                 ret = kxcjk1013_get_odr(data, val, val2);
 732                 mutex_unlock(&data->mutex);
 733                 return ret;
 734
 735         default:
 736                 return -EINVAL;
 737         }
 738 }
 739
 740 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
 741                                struct iio_chan_spec const *chan, int val,
 742                                int val2, long mask)
 743 {
 744         struct kxcjk1013_data *data = iio_priv(indio_dev);
 745         int ret;
 746
 747         switch (mask) {
 748         case IIO_CHAN_INFO_SAMP_FREQ:
 749                 mutex_lock(&data->mutex);
 750                 ret = kxcjk1013_set_odr(data, val, val2);
 751                 mutex_unlock(&data->mutex);
 752                 break;
 753         case IIO_CHAN_INFO_SCALE:
 754                 if (val)
 755                         return -EINVAL;
 756
 757                 mutex_lock(&data->mutex);
 758                 ret = kxcjk1013_set_scale(data, val2);
 759                 mutex_unlock(&data->mutex);
 760                 break;
 761         default:
 762                 ret = -EINVAL;
 763         }
 764
 765         return ret;
 766 }
 767
 768 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
 769                                    const struct iio_chan_spec *chan,
 770                                    enum iio_event_type type,
 771                                    enum iio_event_direction dir,
 772                                    enum iio_event_info info,
 773                                    int *val, int *val2)
 774 {
 775         struct kxcjk1013_data *data = iio_priv(indio_dev);
 776
 777         *val2 = 0;
 778         switch (info) {
 779         case IIO_EV_INFO_VALUE:
 780                 *val = data->wake_thres;
 781                 break;
 782         case IIO_EV_INFO_PERIOD:
 783                 *val = data->wake_dur;
 784                 break;
 785         default:
 786                 return -EINVAL;
 787         }
 788
 789         return IIO_VAL_INT;
 790 }
 791
 792 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
 793                                     const struct iio_chan_spec *chan,
 794                                     enum iio_event_type type,
 795                                     enum iio_event_direction dir,
 796                                     enum iio_event_info info,
 797                                     int val, int val2)
 798 {
 799         struct kxcjk1013_data *data = iio_priv(indio_dev);
 800
 801         if (data->ev_enable_state)
 802                 return -EBUSY;
 803
 804         switch (info) {
 805         case IIO_EV_INFO_VALUE:
 806                 data->wake_thres = val;
 807                 break;
 808         case IIO_EV_INFO_PERIOD:
 809                 data->wake_dur = val;
 810                 break;
 811         default:
 812                 return -EINVAL;
 813         }
 814
 815         return 0;
 816 }
 817
 818 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
 819                                           const struct iio_chan_spec *chan,
 820                                           enum iio_event_type type,
 821                                           enum iio_event_direction dir)
 822 {
 823
 824         struct kxcjk1013_data *data = iio_priv(indio_dev);
 825
 826         return data->ev_enable_state;
 827 }
 828
 829 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
 830                                            const struct iio_chan_spec *chan,
 831                                            enum iio_event_type type,
 832                                            enum iio_event_direction dir,
 833                                            int state)
 834 {
 835         struct kxcjk1013_data *data = iio_priv(indio_dev);
 836         int ret;
 837
 838         if (state && data->ev_enable_state)
 839                 return 0;
 840
 841         mutex_lock(&data->mutex);
 842
 843         if (!state && data->motion_trigger_on) {
 844                 data->ev_enable_state = 0;
 845                 mutex_unlock(&data->mutex);
 846                 return 0;
 847         }
 848
 849         /*
 850          * We will expect the enable and disable to do operation in
 851          * in reverse order. This will happen here anyway as our
 852          * resume operation uses sync mode runtime pm calls, the
 853          * suspend operation will be delayed by autosuspend delay
 854          * So the disable operation will still happen in reverse of
 855          * enable operation. When runtime pm is disabled the mode
 856          * is always on so sequence doesn't matter
 857          */
 858         ret = kxcjk1013_set_power_state(data, state);
 859         if (ret < 0) {
 860                 mutex_unlock(&data->mutex);
 861                 return ret;
 862         }
 863
 864         ret =  kxcjk1013_setup_any_motion_interrupt(data, state);
 865         if (ret < 0) {
 866                 kxcjk1013_set_power_state(data, false);
 867                 data->ev_enable_state = 0;
 868                 mutex_unlock(&data->mutex);
 869                 return ret;
 870         }
 871
 872         data->ev_enable_state = state;
 873         mutex_unlock(&data->mutex);
 874
 875         return 0;
 876 }
 877
 878 static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,
 879                                       struct iio_trigger *trig)
 880 {
 881         struct kxcjk1013_data *data = iio_priv(indio_dev);
 882
 883         if (data->dready_trig != trig && data->motion_trig != trig)
 884                 return -EINVAL;
 885
 886         return 0;
 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_info kxcjk1013_info = {
 939         .attrs                  = &kxcjk1013_attrs_group,
 940         .read_raw               = kxcjk1013_read_raw,
 941         .write_raw              = kxcjk1013_write_raw,
 942         .read_event_value       = kxcjk1013_read_event,
 943         .write_event_value      = kxcjk1013_write_event,
 944         .write_event_config     = kxcjk1013_write_event_config,
 945         .read_event_config      = kxcjk1013_read_event_config,
 946         .validate_trigger       = kxcjk1013_validate_trigger,
 947         .driver_module          = THIS_MODULE,
 948 };
 949
 950 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
 951 {
 952         struct iio_poll_func *pf = p;
 953         struct iio_dev *indio_dev = pf->indio_dev;
 954         struct kxcjk1013_data *data = iio_priv(indio_dev);
 955         int bit, ret, i = 0;
 956
 957         mutex_lock(&data->mutex);
 958
 959         for_each_set_bit(bit, indio_dev->active_scan_mask,
 960                          indio_dev->masklength) {
 961                 ret = kxcjk1013_get_acc_reg(data, bit);
 962                 if (ret < 0) {
 963                         mutex_unlock(&data->mutex);
 964                         goto err;
 965                 }
 966                 data->buffer[i++] = ret;
 967         }
 968         mutex_unlock(&data->mutex);
 969
 970         iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
 971                                            data->timestamp);
 972 err:
 973         iio_trigger_notify_done(indio_dev->trig);
 974
 975         return IRQ_HANDLED;
 976 }
 977
 978 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
 979 {
 980         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 981         struct kxcjk1013_data *data = iio_priv(indio_dev);
 982         int ret;
 983
 984         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
 985         if (ret < 0) {
 986                 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
 987                 return ret;
 988         }
 989
 990         return 0;
 991 }
 992
 993 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
 994                                                 bool state)
 995 {
 996         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
 997         struct kxcjk1013_data *data = iio_priv(indio_dev);
 998         int ret;
 999
1000         mutex_lock(&data->mutex);
1001
1002         if (!state && data->ev_enable_state && data->motion_trigger_on) {
1003                 data->motion_trigger_on = false;
1004                 mutex_unlock(&data->mutex);
1005                 return 0;
1006         }
1007
1008         ret = kxcjk1013_set_power_state(data, state);
1009         if (ret < 0) {
1010                 mutex_unlock(&data->mutex);
1011                 return ret;
1012         }
1013         if (data->motion_trig == trig)
1014                 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1015         else
1016                 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1017         if (ret < 0) {
1018                 kxcjk1013_set_power_state(data, false);
1019                 mutex_unlock(&data->mutex);
1020                 return ret;
1021         }
1022         if (data->motion_trig == trig)
1023                 data->motion_trigger_on = state;
1024         else
1025                 data->dready_trigger_on = state;
1026
1027         mutex_unlock(&data->mutex);
1028
1029         return 0;
1030 }
1031
1032 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1033         .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1034         .try_reenable = kxcjk1013_trig_try_reen,
1035         .owner = THIS_MODULE,
1036 };
1037
1038 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1039 {
1040         struct iio_dev *indio_dev = private;
1041         struct kxcjk1013_data *data = iio_priv(indio_dev);
1042         int ret;
1043
1044         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1045         if (ret < 0) {
1046                 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1047                 goto ack_intr;
1048         }
1049
1050         if (ret & 0x02) {
1051                 ret = i2c_smbus_read_byte_data(data->client,
1052                                                KXCJK1013_REG_INT_SRC2);
1053                 if (ret < 0) {
1054                         dev_err(&data->client->dev,
1055                                 "Error reading reg_int_src2\n");
1056                         goto ack_intr;
1057                 }
1058
1059                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1060                         iio_push_event(indio_dev,
1061                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1062                                        0,
1063                                        IIO_MOD_X,
1064                                        IIO_EV_TYPE_THRESH,
1065                                        IIO_EV_DIR_FALLING),
1066                                        data->timestamp);
1067                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1068                         iio_push_event(indio_dev,
1069                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1070                                        0,
1071                                        IIO_MOD_X,
1072                                        IIO_EV_TYPE_THRESH,
1073                                        IIO_EV_DIR_RISING),
1074                                        data->timestamp);
1075
1076
1077                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1078                         iio_push_event(indio_dev,
1079                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1080                                        0,
1081                                        IIO_MOD_Y,
1082                                        IIO_EV_TYPE_THRESH,
1083                                        IIO_EV_DIR_FALLING),
1084                                        data->timestamp);
1085                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1086                         iio_push_event(indio_dev,
1087                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1088                                        0,
1089                                        IIO_MOD_Y,
1090                                        IIO_EV_TYPE_THRESH,
1091                                        IIO_EV_DIR_RISING),
1092                                        data->timestamp);
1093
1094                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1095                         iio_push_event(indio_dev,
1096                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1097                                        0,
1098                                        IIO_MOD_Z,
1099                                        IIO_EV_TYPE_THRESH,
1100                                        IIO_EV_DIR_FALLING),
1101                                        data->timestamp);
1102                 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1103                         iio_push_event(indio_dev,
1104                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1105                                        0,
1106                                        IIO_MOD_Z,
1107                                        IIO_EV_TYPE_THRESH,
1108                                        IIO_EV_DIR_RISING),
1109                                        data->timestamp);
1110         }
1111
1112 ack_intr:
1113         if (data->dready_trigger_on)
1114                 return IRQ_HANDLED;
1115
1116         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1117         if (ret < 0)
1118                 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1119
1120         return IRQ_HANDLED;
1121 }
1122
1123 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1124 {
1125         struct iio_dev *indio_dev = private;
1126         struct kxcjk1013_data *data = iio_priv(indio_dev);
1127
1128         data->timestamp = iio_get_time_ns();
1129
1130         if (data->dready_trigger_on)
1131                 iio_trigger_poll(data->dready_trig);
1132         else if (data->motion_trigger_on)
1133                 iio_trigger_poll(data->motion_trig);
1134
1135         if (data->ev_enable_state)
1136                 return IRQ_WAKE_THREAD;
1137         else
1138                 return IRQ_HANDLED;
1139 }
1140
1141 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1142                                                enum kx_chipset *chipset,
1143                                                bool *is_smo8500_device)
1144 {
1145         const struct acpi_device_id *id;
1146
1147         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1148         if (!id)
1149                 return NULL;
1150         if (strcmp(id->id, "SMO8500") == 0)
1151                 *is_smo8500_device = true;
1152         *chipset = (enum kx_chipset)id->driver_data;
1153
1154         return dev_name(dev);
1155 }
1156
1157 static int kxcjk1013_gpio_probe(struct i2c_client *client,
1158                                 struct kxcjk1013_data *data)
1159 {
1160         struct device *dev;
1161         struct gpio_desc *gpio;
1162         int ret;
1163
1164         if (!client)
1165                 return -EINVAL;
1166         if (data->is_smo8500_device)
1167                 return -ENOTSUPP;
1168
1169         dev = &client->dev;
1170
1171         /* data ready gpio interrupt pin */
1172         gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0, GPIOD_IN);
1173         if (IS_ERR(gpio)) {
1174                 dev_err(dev, "acpi gpio get index failed\n");
1175                 return PTR_ERR(gpio);
1176         }
1177
1178         ret = gpiod_to_irq(gpio);
1179
1180         dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1181
1182         return ret;
1183 }
1184
1185 static int kxcjk1013_probe(struct i2c_client *client,
1186                            const struct i2c_device_id *id)
1187 {
1188         struct kxcjk1013_data *data;
1189         struct iio_dev *indio_dev;
1190         struct kxcjk_1013_platform_data *pdata;
1191         const char *name;
1192         int ret;
1193
1194         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1195         if (!indio_dev)
1196                 return -ENOMEM;
1197
1198         data = iio_priv(indio_dev);
1199         i2c_set_clientdata(client, indio_dev);
1200         data->client = client;
1201
1202         pdata = dev_get_platdata(&client->dev);
1203         if (pdata)
1204                 data->active_high_intr = pdata->active_high_intr;
1205         else
1206                 data->active_high_intr = true; /* default polarity */
1207
1208         if (id) {
1209                 data->chipset = (enum kx_chipset)(id->driver_data);
1210                 name = id->name;
1211         } else if (ACPI_HANDLE(&client->dev)) {
1212                 name = kxcjk1013_match_acpi_device(&client->dev,
1213                                                    &data->chipset,
1214                                                    &data->is_smo8500_device);
1215         } else
1216                 return -ENODEV;
1217
1218         ret = kxcjk1013_chip_init(data);
1219         if (ret < 0)
1220                 return ret;
1221
1222         mutex_init(&data->mutex);
1223
1224         indio_dev->dev.parent = &client->dev;
1225         indio_dev->channels = kxcjk1013_channels;
1226         indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1227         indio_dev->name = name;
1228         indio_dev->modes = INDIO_DIRECT_MODE;
1229         indio_dev->info = &kxcjk1013_info;
1230
1231         if (client->irq < 0)
1232                 client->irq = kxcjk1013_gpio_probe(client, data);
1233
1234         if (client->irq >= 0) {
1235                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1236                                                 kxcjk1013_data_rdy_trig_poll,
1237                                                 kxcjk1013_event_handler,
1238                                                 IRQF_TRIGGER_RISING,
1239                                                 KXCJK1013_IRQ_NAME,
1240                                                 indio_dev);
1241                 if (ret)
1242                         goto err_poweroff;
1243
1244                 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1245                                                            "%s-dev%d",
1246                                                            indio_dev->name,
1247                                                            indio_dev->id);
1248                 if (!data->dready_trig) {
1249                         ret = -ENOMEM;
1250                         goto err_poweroff;
1251                 }
1252
1253                 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1254                                                           "%s-any-motion-dev%d",
1255                                                           indio_dev->name,
1256                                                           indio_dev->id);
1257                 if (!data->motion_trig) {
1258                         ret = -ENOMEM;
1259                         goto err_poweroff;
1260                 }
1261
1262                 data->dready_trig->dev.parent = &client->dev;
1263                 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1264                 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1265                 indio_dev->trig = data->dready_trig;
1266                 iio_trigger_get(indio_dev->trig);
1267                 ret = iio_trigger_register(data->dready_trig);
1268                 if (ret)
1269                         goto err_poweroff;
1270
1271                 data->motion_trig->dev.parent = &client->dev;
1272                 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1273                 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1274                 ret = iio_trigger_register(data->motion_trig);
1275                 if (ret) {
1276                         data->motion_trig = NULL;
1277                         goto err_trigger_unregister;
1278                 }
1279
1280                 ret = iio_triggered_buffer_setup(indio_dev,
1281                                                 &iio_pollfunc_store_time,
1282                                                 kxcjk1013_trigger_handler,
1283                                                 NULL);
1284                 if (ret < 0) {
1285                         dev_err(&client->dev,
1286                                         "iio triggered buffer setup failed\n");
1287                         goto err_trigger_unregister;
1288                 }
1289         }
1290
1291         ret = iio_device_register(indio_dev);
1292         if (ret < 0) {
1293                 dev_err(&client->dev, "unable to register iio device\n");
1294                 goto err_buffer_cleanup;
1295         }
1296
1297         ret = pm_runtime_set_active(&client->dev);
1298         if (ret)
1299                 goto err_iio_unregister;
1300
1301         pm_runtime_enable(&client->dev);
1302         pm_runtime_set_autosuspend_delay(&client->dev,
1303                                          KXCJK1013_SLEEP_DELAY_MS);
1304         pm_runtime_use_autosuspend(&client->dev);
1305
1306         return 0;
1307
1308 err_iio_unregister:
1309         iio_device_unregister(indio_dev);
1310 err_buffer_cleanup:
1311         if (data->dready_trig)
1312                 iio_triggered_buffer_cleanup(indio_dev);
1313 err_trigger_unregister:
1314         if (data->dready_trig)
1315                 iio_trigger_unregister(data->dready_trig);
1316         if (data->motion_trig)
1317                 iio_trigger_unregister(data->motion_trig);
1318 err_poweroff:
1319         kxcjk1013_set_mode(data, STANDBY);
1320
1321         return ret;
1322 }
1323
1324 static int kxcjk1013_remove(struct i2c_client *client)
1325 {
1326         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1327         struct kxcjk1013_data *data = iio_priv(indio_dev);
1328
1329         pm_runtime_disable(&client->dev);
1330         pm_runtime_set_suspended(&client->dev);
1331         pm_runtime_put_noidle(&client->dev);
1332
1333         iio_device_unregister(indio_dev);
1334
1335         if (data->dready_trig) {
1336                 iio_triggered_buffer_cleanup(indio_dev);
1337                 iio_trigger_unregister(data->dready_trig);
1338                 iio_trigger_unregister(data->motion_trig);
1339         }
1340
1341         mutex_lock(&data->mutex);
1342         kxcjk1013_set_mode(data, STANDBY);
1343         mutex_unlock(&data->mutex);
1344
1345         return 0;
1346 }
1347
1348 #ifdef CONFIG_PM_SLEEP
1349 static int kxcjk1013_suspend(struct device *dev)
1350 {
1351         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1352         struct kxcjk1013_data *data = iio_priv(indio_dev);
1353         int ret;
1354
1355         mutex_lock(&data->mutex);
1356         ret = kxcjk1013_set_mode(data, STANDBY);
1357         mutex_unlock(&data->mutex);
1358
1359         return ret;
1360 }
1361
1362 static int kxcjk1013_resume(struct device *dev)
1363 {
1364         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1365         struct kxcjk1013_data *data = iio_priv(indio_dev);
1366         int ret = 0;
1367
1368         mutex_lock(&data->mutex);
1369         ret = kxcjk1013_set_mode(data, OPERATION);
1370         mutex_unlock(&data->mutex);
1371
1372         return ret;
1373 }
1374 #endif
1375
1376 #ifdef CONFIG_PM
1377 static int kxcjk1013_runtime_suspend(struct device *dev)
1378 {
1379         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1380         struct kxcjk1013_data *data = iio_priv(indio_dev);
1381         int ret;
1382
1383         ret = kxcjk1013_set_mode(data, STANDBY);
1384         if (ret < 0) {
1385                 dev_err(&data->client->dev, "powering off device failed\n");
1386                 return -EAGAIN;
1387         }
1388         return 0;
1389 }
1390
1391 static int kxcjk1013_runtime_resume(struct device *dev)
1392 {
1393         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1394         struct kxcjk1013_data *data = iio_priv(indio_dev);
1395         int ret;
1396         int sleep_val;
1397
1398         ret = kxcjk1013_set_mode(data, OPERATION);
1399         if (ret < 0)
1400                 return ret;
1401
1402         sleep_val = kxcjk1013_get_startup_times(data);
1403         if (sleep_val < 20000)
1404                 usleep_range(sleep_val, 20000);
1405         else
1406                 msleep_interruptible(sleep_val/1000);
1407
1408         return 0;
1409 }
1410 #endif
1411
1412 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1413         SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1414         SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1415                            kxcjk1013_runtime_resume, NULL)
1416 };
1417
1418 static const struct acpi_device_id kx_acpi_match[] = {
1419         {"KXCJ1013", KXCJK1013},
1420         {"KXCJ1008", KXCJ91008},
1421         {"KXCJ9000", KXCJ91008},
1422         {"KXTJ1009", KXTJ21009},
1423         {"SMO8500",  KXCJ91008},
1424         { },
1425 };
1426 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1427
1428 static const struct i2c_device_id kxcjk1013_id[] = {
1429         {"kxcjk1013", KXCJK1013},
1430         {"kxcj91008", KXCJ91008},
1431         {"kxtj21009", KXTJ21009},
1432         {"SMO8500",   KXCJ91008},
1433         {}
1434 };
1435
1436 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1437
1438 static struct i2c_driver kxcjk1013_driver = {
1439         .driver = {
1440                 .name   = KXCJK1013_DRV_NAME,
1441                 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1442                 .pm     = &kxcjk1013_pm_ops,
1443         },
1444         .probe          = kxcjk1013_probe,
1445         .remove         = kxcjk1013_remove,
1446         .id_table       = kxcjk1013_id,
1447 };
1448 module_i2c_driver(kxcjk1013_driver);
1449
1450 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1451 MODULE_LICENSE("GPL v2");
1452 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");