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 KXTF9_REG_HP_XOUT_L             0x00
  38 #define KXTF9_REG_HP_XOUT_H             0x01
  39 #define KXTF9_REG_HP_YOUT_L             0x02
  40 #define KXTF9_REG_HP_YOUT_H             0x03
  41 #define KXTF9_REG_HP_ZOUT_L             0x04
  42 #define KXTF9_REG_HP_ZOUT_H             0x05
  43
  44 #define KXCJK1013_REG_XOUT_L            0x06
  45 /*
  46  * From low byte X axis register, all the other addresses of Y and Z can be
  47  * obtained by just applying axis offset. The following axis defines are just
  48  * provide clarity, but not used.
  49  */
  50 #define KXCJK1013_REG_XOUT_H            0x07
  51 #define KXCJK1013_REG_YOUT_L            0x08
  52 #define KXCJK1013_REG_YOUT_H            0x09
  53 #define KXCJK1013_REG_ZOUT_L            0x0A
  54 #define KXCJK1013_REG_ZOUT_H            0x0B
  55
  56 #define KXCJK1013_REG_DCST_RESP         0x0C
  57 #define KXCJK1013_REG_WHO_AM_I          0x0F
  58 #define KXTF9_REG_TILT_POS_CUR          0x10
  59 #define KXTF9_REG_TILT_POS_PREV         0x11
  60 #define KXTF9_REG_INT_SRC1              0x15
  61 #define KXCJK1013_REG_INT_SRC1          0x16    /* compatible, but called INT_SRC2 in KXTF9 ds */
  62 #define KXCJK1013_REG_INT_SRC2          0x17
  63 #define KXCJK1013_REG_STATUS_REG        0x18
  64 #define KXCJK1013_REG_INT_REL           0x1A
  65 #define KXCJK1013_REG_CTRL1             0x1B
  66 #define KXTF9_REG_CTRL2                 0x1C
  67 #define KXCJK1013_REG_CTRL2             0x1D    /* mostly compatible, CTRL_REG3 in KTXF9 ds */
  68 #define KXCJK1013_REG_INT_CTRL1         0x1E
  69 #define KXCJK1013_REG_INT_CTRL2         0x1F
  70 #define KXTF9_REG_INT_CTRL3             0x20
  71 #define KXCJK1013_REG_DATA_CTRL         0x21
  72 #define KXTF9_REG_TILT_TIMER            0x28
  73 #define KXCJK1013_REG_WAKE_TIMER        0x29
  74 #define KXTF9_REG_TDT_TIMER             0x2B
  75 #define KXTF9_REG_TDT_THRESH_H          0x2C
  76 #define KXTF9_REG_TDT_THRESH_L          0x2D
  77 #define KXTF9_REG_TDT_TAP_TIMER         0x2E
  78 #define KXTF9_REG_TDT_TOTAL_TIMER       0x2F
  79 #define KXTF9_REG_TDT_LATENCY_TIMER     0x30
  80 #define KXTF9_REG_TDT_WINDOW_TIMER      0x31
  81 #define KXCJK1013_REG_SELF_TEST         0x3A
  82 #define KXTF9_REG_WAKE_THRESH           0x5A
  83 #define KXTF9_REG_TILT_ANGLE            0x5C
  84 #define KXTF9_REG_HYST_SET              0x5F
  85 #define KXCJK1013_REG_WAKE_THRES        0x6A
  86
  87 #define KXCJK1013_REG_CTRL1_BIT_PC1     BIT(7)
  88 #define KXCJK1013_REG_CTRL1_BIT_RES     BIT(6)
  89 #define KXCJK1013_REG_CTRL1_BIT_DRDY    BIT(5)
  90 #define KXCJK1013_REG_CTRL1_BIT_GSEL1   BIT(4)
  91 #define KXCJK1013_REG_CTRL1_BIT_GSEL0   BIT(3)
  92 #define KXCJK1013_REG_CTRL1_BIT_WUFE    BIT(1)
  93
  94 #define KXCJK1013_REG_INT_CTRL1_BIT_IEU BIT(2)  /* KXTF9 */
  95 #define KXCJK1013_REG_INT_CTRL1_BIT_IEL BIT(3)
  96 #define KXCJK1013_REG_INT_CTRL1_BIT_IEA BIT(4)
  97 #define KXCJK1013_REG_INT_CTRL1_BIT_IEN BIT(5)
  98
  99 #define KXTF9_REG_TILT_BIT_LEFT_EDGE    BIT(5)
 100 #define KXTF9_REG_TILT_BIT_RIGHT_EDGE   BIT(4)
 101 #define KXTF9_REG_TILT_BIT_LOWER_EDGE   BIT(3)
 102 #define KXTF9_REG_TILT_BIT_UPPER_EDGE   BIT(2)
 103 #define KXTF9_REG_TILT_BIT_FACE_DOWN    BIT(1)
 104 #define KXTF9_REG_TILT_BIT_FACE_UP      BIT(0)
 105
 106 #define KXCJK1013_DATA_MASK_12_BIT      0x0FFF
 107 #define KXCJK1013_MAX_STARTUP_TIME_US   100000
 108
 109 #define KXCJK1013_SLEEP_DELAY_MS        2000
 110
 111 #define KXCJK1013_REG_INT_SRC1_BIT_TPS  BIT(0)  /* KXTF9 */
 112 #define KXCJK1013_REG_INT_SRC1_BIT_WUFS BIT(1)
 113 #define KXCJK1013_REG_INT_SRC1_MASK_TDTS        (BIT(2) | BIT(3))       /* KXTF9 */
 114 #define KXCJK1013_REG_INT_SRC1_TAP_NONE         0
 115 #define KXCJK1013_REG_INT_SRC1_TAP_SINGLE               BIT(2)
 116 #define KXCJK1013_REG_INT_SRC1_TAP_DOUBLE               BIT(3)
 117 #define KXCJK1013_REG_INT_SRC1_BIT_DRDY BIT(4)
 118
 119 /* KXCJK: INT_SOURCE2: motion detect, KXTF9: INT_SRC_REG1: tap detect */
 120 #define KXCJK1013_REG_INT_SRC2_BIT_ZP   BIT(0)
 121 #define KXCJK1013_REG_INT_SRC2_BIT_ZN   BIT(1)
 122 #define KXCJK1013_REG_INT_SRC2_BIT_YP   BIT(2)
 123 #define KXCJK1013_REG_INT_SRC2_BIT_YN   BIT(3)
 124 #define KXCJK1013_REG_INT_SRC2_BIT_XP   BIT(4)
 125 #define KXCJK1013_REG_INT_SRC2_BIT_XN   BIT(5)
 126
 127 #define KXCJK1013_DEFAULT_WAKE_THRES    1
 128
 129 enum kx_chipset {
 130         KXCJK1013,
 131         KXCJ91008,
 132         KXTJ21009,
 133         KXTF9,
 134         KX_MAX_CHIPS /* this must be last */
 135 };
 136
 137 enum kx_acpi_type {
 138         ACPI_GENERIC,
 139         ACPI_SMO8500,
 140         ACPI_KIOX010A,
 141 };
 142
 143 enum kxcjk1013_axis {
 144         AXIS_X,
 145         AXIS_Y,
 146         AXIS_Z,
 147         AXIS_MAX
 148 };
 149
 150 struct kxcjk1013_data {
 151         struct i2c_client *client;
 152         struct iio_trigger *dready_trig;
 153         struct iio_trigger *motion_trig;
 154         struct mutex mutex;
 155         /* Ensure timestamp naturally aligned */
 156         struct {
 157                 s16 chans[AXIS_MAX];
 158                 s64 timestamp __aligned(8);
 159         } scan;
 160         u8 odr_bits;
 161         u8 range;
 162         int wake_thres;
 163         int wake_dur;
 164         bool active_high_intr;
 165         bool dready_trigger_on;
 166         int ev_enable_state;
 167         bool motion_trigger_on;
 168         int64_t timestamp;
 169         enum kx_chipset chipset;
 170         enum kx_acpi_type acpi_type;
 171 };
 172
 173 enum kxcjk1013_mode {
 174         STANDBY,
 175         OPERATION,
 176 };
 177
 178 enum kxcjk1013_range {
 179         KXCJK1013_RANGE_2G,
 180         KXCJK1013_RANGE_4G,
 181         KXCJK1013_RANGE_8G,
 182 };
 183
 184 struct kx_odr_map {
 185         int val;
 186         int val2;
 187         int odr_bits;
 188         int wuf_bits;
 189 };
 190
 191 static const struct kx_odr_map samp_freq_table[] = {
 192         { 0, 781000, 0x08, 0x00 },
 193         { 1, 563000, 0x09, 0x01 },
 194         { 3, 125000, 0x0A, 0x02 },
 195         { 6, 250000, 0x0B, 0x03 },
 196         { 12, 500000, 0x00, 0x04 },
 197         { 25, 0, 0x01, 0x05 },
 198         { 50, 0, 0x02, 0x06 },
 199         { 100, 0, 0x03, 0x06 },
 200         { 200, 0, 0x04, 0x06 },
 201         { 400, 0, 0x05, 0x06 },
 202         { 800, 0, 0x06, 0x06 },
 203         { 1600, 0, 0x07, 0x06 },
 204 };
 205
 206 static const char *const kxcjk1013_samp_freq_avail =
 207         "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600";
 208
 209 static const struct kx_odr_map kxtf9_samp_freq_table[] = {
 210         { 25, 0, 0x01, 0x00 },
 211         { 50, 0, 0x02, 0x01 },
 212         { 100, 0, 0x03, 0x01 },
 213         { 200, 0, 0x04, 0x01 },
 214         { 400, 0, 0x05, 0x01 },
 215         { 800, 0, 0x06, 0x01 },
 216 };
 217
 218 static const char *const kxtf9_samp_freq_avail =
 219         "25 50 100 200 400 800";
 220
 221 /* Refer to section 4 of the specification */
 222 static const struct {
 223         int odr_bits;
 224         int usec;
 225 } odr_start_up_times[KX_MAX_CHIPS][12] = {
 226         /* KXCJK-1013 */
 227         {
 228                 {0x08, 100000},
 229                 {0x09, 100000},
 230                 {0x0A, 100000},
 231                 {0x0B, 100000},
 232                 {0, 80000},
 233                 {0x01, 41000},
 234                 {0x02, 21000},
 235                 {0x03, 11000},
 236                 {0x04, 6400},
 237                 {0x05, 3900},
 238                 {0x06, 2700},
 239                 {0x07, 2100},
 240         },
 241         /* KXCJ9-1008 */
 242         {
 243                 {0x08, 100000},
 244                 {0x09, 100000},
 245                 {0x0A, 100000},
 246                 {0x0B, 100000},
 247                 {0, 80000},
 248                 {0x01, 41000},
 249                 {0x02, 21000},
 250                 {0x03, 11000},
 251                 {0x04, 6400},
 252                 {0x05, 3900},
 253                 {0x06, 2700},
 254                 {0x07, 2100},
 255         },
 256         /* KXCTJ2-1009 */
 257         {
 258                 {0x08, 1240000},
 259                 {0x09, 621000},
 260                 {0x0A, 309000},
 261                 {0x0B, 151000},
 262                 {0, 80000},
 263                 {0x01, 41000},
 264                 {0x02, 21000},
 265                 {0x03, 11000},
 266                 {0x04, 6000},
 267                 {0x05, 4000},
 268                 {0x06, 3000},
 269                 {0x07, 2000},
 270         },
 271         /* KXTF9 */
 272         {
 273                 {0x01, 81000},
 274                 {0x02, 41000},
 275                 {0x03, 21000},
 276                 {0x04, 11000},
 277                 {0x05, 5100},
 278                 {0x06, 2700},
 279         },
 280 };
 281
 282 static const struct {
 283         u16 scale;
 284         u8 gsel_0;
 285         u8 gsel_1;
 286 } KXCJK1013_scale_table[] = { {9582, 0, 0},
 287                               {19163, 1, 0},
 288                               {38326, 0, 1} };
 289
 290 #ifdef CONFIG_ACPI
 291 enum kiox010a_fn_index {
 292         KIOX010A_SET_LAPTOP_MODE = 1,
 293         KIOX010A_SET_TABLET_MODE = 2,
 294 };
 295
 296 static int kiox010a_dsm(struct device *dev, int fn_index)
 297 {
 298         acpi_handle handle = ACPI_HANDLE(dev);
 299         guid_t kiox010a_dsm_guid;
 300         union acpi_object *obj;
 301
 302         if (!handle)
 303                 return -ENODEV;
 304
 305         guid_parse("1f339696-d475-4e26-8cad-2e9f8e6d7a91", &kiox010a_dsm_guid);
 306
 307         obj = acpi_evaluate_dsm(handle, &kiox010a_dsm_guid, 1, fn_index, NULL);
 308         if (!obj)
 309                 return -EIO;
 310
 311         ACPI_FREE(obj);
 312         return 0;
 313 }
 314 #endif
 315
 316 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
 317                               enum kxcjk1013_mode mode)
 318 {
 319         int ret;
 320
 321         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 322         if (ret < 0) {
 323                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 324                 return ret;
 325         }
 326
 327         if (mode == STANDBY)
 328                 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
 329         else
 330                 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
 331
 332         ret = i2c_smbus_write_byte_data(data->client,
 333                                         KXCJK1013_REG_CTRL1, ret);
 334         if (ret < 0) {
 335                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 336                 return ret;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
 343                               enum kxcjk1013_mode *mode)
 344 {
 345         int ret;
 346
 347         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 348         if (ret < 0) {
 349                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 350                 return ret;
 351         }
 352
 353         if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
 354                 *mode = OPERATION;
 355         else
 356                 *mode = STANDBY;
 357
 358         return 0;
 359 }
 360
 361 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
 362 {
 363         int ret;
 364
 365         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 366         if (ret < 0) {
 367                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 368                 return ret;
 369         }
 370
 371         ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
 372                  KXCJK1013_REG_CTRL1_BIT_GSEL1);
 373         ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
 374         ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
 375
 376         ret = i2c_smbus_write_byte_data(data->client,
 377                                         KXCJK1013_REG_CTRL1,
 378                                         ret);
 379         if (ret < 0) {
 380                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 381                 return ret;
 382         }
 383
 384         data->range = range_index;
 385
 386         return 0;
 387 }
 388
 389 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
 390 {
 391         int ret;
 392
 393 #ifdef CONFIG_ACPI
 394         if (data->acpi_type == ACPI_KIOX010A) {
 395                 /* Make sure the kbd and touchpad on 2-in-1s using 2 KXCJ91008-s work */
 396                 kiox010a_dsm(&data->client->dev, KIOX010A_SET_LAPTOP_MODE);
 397         }
 398 #endif
 399
 400         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
 401         if (ret < 0) {
 402                 dev_err(&data->client->dev, "Error reading who_am_i\n");
 403                 return ret;
 404         }
 405
 406         dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
 407
 408         ret = kxcjk1013_set_mode(data, STANDBY);
 409         if (ret < 0)
 410                 return ret;
 411
 412         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 413         if (ret < 0) {
 414                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 415                 return ret;
 416         }
 417
 418         /* Set 12 bit mode */
 419         ret |= KXCJK1013_REG_CTRL1_BIT_RES;
 420
 421         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
 422                                         ret);
 423         if (ret < 0) {
 424                 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
 425                 return ret;
 426         }
 427
 428         /* Setting range to 4G */
 429         ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
 430         if (ret < 0)
 431                 return ret;
 432
 433         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
 434         if (ret < 0) {
 435                 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
 436                 return ret;
 437         }
 438
 439         data->odr_bits = ret;
 440
 441         /* Set up INT polarity */
 442         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
 443         if (ret < 0) {
 444                 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
 445                 return ret;
 446         }
 447
 448         if (data->active_high_intr)
 449                 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEA;
 450         else
 451                 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEA;
 452
 453         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
 454                                         ret);
 455         if (ret < 0) {
 456                 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
 457                 return ret;
 458         }
 459
 460         ret = kxcjk1013_set_mode(data, OPERATION);
 461         if (ret < 0)
 462                 return ret;
 463
 464         data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
 465
 466         return 0;
 467 }
 468
 469 #ifdef CONFIG_PM
 470 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
 471 {
 472         int i;
 473         int idx = data->chipset;
 474
 475         for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
 476                 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
 477                         return odr_start_up_times[idx][i].usec;
 478         }
 479
 480         return KXCJK1013_MAX_STARTUP_TIME_US;
 481 }
 482 #endif
 483
 484 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
 485 {
 486 #ifdef CONFIG_PM
 487         int ret;
 488
 489         if (on)
 490                 ret = pm_runtime_get_sync(&data->client->dev);
 491         else {
 492                 pm_runtime_mark_last_busy(&data->client->dev);
 493                 ret = pm_runtime_put_autosuspend(&data->client->dev);
 494         }
 495         if (ret < 0) {
 496                 dev_err(&data->client->dev,
 497                         "Failed: kxcjk1013_set_power_state for %d\n", on);
 498                 if (on)
 499                         pm_runtime_put_noidle(&data->client->dev);
 500                 return ret;
 501         }
 502 #endif
 503
 504         return 0;
 505 }
 506
 507 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
 508 {
 509         int waketh_reg, ret;
 510
 511         ret = i2c_smbus_write_byte_data(data->client,
 512                                         KXCJK1013_REG_WAKE_TIMER,
 513                                         data->wake_dur);
 514         if (ret < 0) {
 515                 dev_err(&data->client->dev,
 516                         "Error writing reg_wake_timer\n");
 517                 return ret;
 518         }
 519
 520         waketh_reg = data->chipset == KXTF9 ?
 521                 KXTF9_REG_WAKE_THRESH : KXCJK1013_REG_WAKE_THRES;
 522         ret = i2c_smbus_write_byte_data(data->client, waketh_reg,
 523                                         data->wake_thres);
 524         if (ret < 0) {
 525                 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
 526                 return ret;
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
 533                                                 bool status)
 534 {
 535         int ret;
 536         enum kxcjk1013_mode store_mode;
 537
 538         ret = kxcjk1013_get_mode(data, &store_mode);
 539         if (ret < 0)
 540                 return ret;
 541
 542         /* This is requirement by spec to change state to STANDBY */
 543         ret = kxcjk1013_set_mode(data, STANDBY);
 544         if (ret < 0)
 545                 return ret;
 546
 547         ret = kxcjk1013_chip_update_thresholds(data);
 548         if (ret < 0)
 549                 return ret;
 550
 551         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
 552         if (ret < 0) {
 553                 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
 554                 return ret;
 555         }
 556
 557         if (status)
 558                 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
 559         else
 560                 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
 561
 562         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
 563                                         ret);
 564         if (ret < 0) {
 565                 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
 566                 return ret;
 567         }
 568
 569         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 570         if (ret < 0) {
 571                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 572                 return ret;
 573         }
 574
 575         if (status)
 576                 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
 577         else
 578                 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
 579
 580         ret = i2c_smbus_write_byte_data(data->client,
 581                                         KXCJK1013_REG_CTRL1, ret);
 582         if (ret < 0) {
 583                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 584                 return ret;
 585         }
 586
 587         if (store_mode == OPERATION) {
 588                 ret = kxcjk1013_set_mode(data, OPERATION);
 589                 if (ret < 0)
 590                         return ret;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
 597                                               bool status)
 598 {
 599         int ret;
 600         enum kxcjk1013_mode store_mode;
 601
 602         ret = kxcjk1013_get_mode(data, &store_mode);
 603         if (ret < 0)
 604                 return ret;
 605
 606         /* This is requirement by spec to change state to STANDBY */
 607         ret = kxcjk1013_set_mode(data, STANDBY);
 608         if (ret < 0)
 609                 return ret;
 610
 611         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
 612         if (ret < 0) {
 613                 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
 614                 return ret;
 615         }
 616
 617         if (status)
 618                 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
 619         else
 620                 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
 621
 622         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
 623                                         ret);
 624         if (ret < 0) {
 625                 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
 626                 return ret;
 627         }
 628
 629         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
 630         if (ret < 0) {
 631                 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
 632                 return ret;
 633         }
 634
 635         if (status)
 636                 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
 637         else
 638                 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
 639
 640         ret = i2c_smbus_write_byte_data(data->client,
 641                                         KXCJK1013_REG_CTRL1, ret);
 642         if (ret < 0) {
 643                 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
 644                 return ret;
 645         }
 646
 647         if (store_mode == OPERATION) {
 648                 ret = kxcjk1013_set_mode(data, OPERATION);
 649                 if (ret < 0)
 650                         return ret;
 651         }
 652
 653         return 0;
 654 }
 655
 656 static const struct kx_odr_map *kxcjk1013_find_odr_value(
 657         const struct kx_odr_map *map, size_t map_size, int val, int val2)
 658 {
 659         int i;
 660
 661         for (i = 0; i < map_size; ++i) {
 662                 if (map[i].val == val && map[i].val2 == val2)
 663                         return &map[i];
 664         }
 665
 666         return ERR_PTR(-EINVAL);
 667 }
 668
 669 static int kxcjk1013_convert_odr_value(const struct kx_odr_map *map,
 670                                        size_t map_size, int odr_bits,
 671                                        int *val, int *val2)
 672 {
 673         int i;
 674
 675         for (i = 0; i < map_size; ++i) {
 676                 if (map[i].odr_bits == odr_bits) {
 677                         *val = map[i].val;
 678                         *val2 = map[i].val2;
 679                         return IIO_VAL_INT_PLUS_MICRO;
 680                 }
 681         }
 682
 683         return -EINVAL;
 684 }
 685
 686 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
 687 {
 688         int ret;
 689         enum kxcjk1013_mode store_mode;
 690         const struct kx_odr_map *odr_setting;
 691
 692         ret = kxcjk1013_get_mode(data, &store_mode);
 693         if (ret < 0)
 694                 return ret;
 695
 696         if (data->chipset == KXTF9)
 697                 odr_setting = kxcjk1013_find_odr_value(kxtf9_samp_freq_table,
 698                                                        ARRAY_SIZE(kxtf9_samp_freq_table),
 699                                                        val, val2);
 700         else
 701                 odr_setting = kxcjk1013_find_odr_value(samp_freq_table,
 702                                                        ARRAY_SIZE(samp_freq_table),
 703                                                        val, val2);
 704
 705         if (IS_ERR(odr_setting))
 706                 return PTR_ERR(odr_setting);
 707
 708         /* To change ODR, the chip must be set to STANDBY as per spec */
 709         ret = kxcjk1013_set_mode(data, STANDBY);
 710         if (ret < 0)
 711                 return ret;
 712
 713         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
 714                                         odr_setting->odr_bits);
 715         if (ret < 0) {
 716                 dev_err(&data->client->dev, "Error writing data_ctrl\n");
 717                 return ret;
 718         }
 719
 720         data->odr_bits = odr_setting->odr_bits;
 721
 722         ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
 723                                         odr_setting->wuf_bits);
 724         if (ret < 0) {
 725                 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
 726                 return ret;
 727         }
 728
 729         if (store_mode == OPERATION) {
 730                 ret = kxcjk1013_set_mode(data, OPERATION);
 731                 if (ret < 0)
 732                         return ret;
 733         }
 734
 735         return 0;
 736 }
 737
 738 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
 739 {
 740         if (data->chipset == KXTF9)
 741                 return kxcjk1013_convert_odr_value(kxtf9_samp_freq_table,
 742                                                    ARRAY_SIZE(kxtf9_samp_freq_table),
 743                                                    data->odr_bits, val, val2);
 744         else
 745                 return kxcjk1013_convert_odr_value(samp_freq_table,
 746                                                    ARRAY_SIZE(samp_freq_table),
 747                                                    data->odr_bits, val, val2);
 748 }
 749
 750 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
 751 {
 752         u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
 753         int ret;
 754
 755         ret = i2c_smbus_read_word_data(data->client, reg);
 756         if (ret < 0) {
 757                 dev_err(&data->client->dev,
 758                         "failed to read accel_%c registers\n", 'x' + axis);
 759                 return ret;
 760         }
 761
 762         return ret;
 763 }
 764
 765 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
 766 {
 767         int ret, i;
 768         enum kxcjk1013_mode store_mode;
 769
 770         for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
 771                 if (KXCJK1013_scale_table[i].scale == val) {
 772                         ret = kxcjk1013_get_mode(data, &store_mode);
 773                         if (ret < 0)
 774                                 return ret;
 775
 776                         ret = kxcjk1013_set_mode(data, STANDBY);
 777                         if (ret < 0)
 778                                 return ret;
 779
 780                         ret = kxcjk1013_set_range(data, i);
 781                         if (ret < 0)
 782                                 return ret;
 783
 784                         if (store_mode == OPERATION) {
 785                                 ret = kxcjk1013_set_mode(data, OPERATION);
 786                                 if (ret)
 787                                         return ret;
 788                         }
 789
 790                         return 0;
 791                 }
 792         }
 793
 794         return -EINVAL;
 795 }
 796
 797 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
 798                               struct iio_chan_spec const *chan, int *val,
 799                               int *val2, long mask)
 800 {
 801         struct kxcjk1013_data *data = iio_priv(indio_dev);
 802         int ret;
 803
 804         switch (mask) {
 805         case IIO_CHAN_INFO_RAW:
 806                 mutex_lock(&data->mutex);
 807                 if (iio_buffer_enabled(indio_dev))
 808                         ret = -EBUSY;
 809                 else {
 810                         ret = kxcjk1013_set_power_state(data, true);
 811                         if (ret < 0) {
 812                                 mutex_unlock(&data->mutex);
 813                                 return ret;
 814                         }
 815                         ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
 816                         if (ret < 0) {
 817                                 kxcjk1013_set_power_state(data, false);
 818                                 mutex_unlock(&data->mutex);
 819                                 return ret;
 820                         }
 821                         *val = sign_extend32(ret >> 4, 11);
 822                         ret = kxcjk1013_set_power_state(data, false);
 823                 }
 824                 mutex_unlock(&data->mutex);
 825
 826                 if (ret < 0)
 827                         return ret;
 828
 829                 return IIO_VAL_INT;
 830
 831         case IIO_CHAN_INFO_SCALE:
 832                 *val = 0;
 833                 *val2 = KXCJK1013_scale_table[data->range].scale;
 834                 return IIO_VAL_INT_PLUS_MICRO;
 835
 836         case IIO_CHAN_INFO_SAMP_FREQ:
 837                 mutex_lock(&data->mutex);
 838                 ret = kxcjk1013_get_odr(data, val, val2);
 839                 mutex_unlock(&data->mutex);
 840                 return ret;
 841
 842         default:
 843                 return -EINVAL;
 844         }
 845 }
 846
 847 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
 848                                struct iio_chan_spec const *chan, int val,
 849                                int val2, long mask)
 850 {
 851         struct kxcjk1013_data *data = iio_priv(indio_dev);
 852         int ret;
 853
 854         switch (mask) {
 855         case IIO_CHAN_INFO_SAMP_FREQ:
 856                 mutex_lock(&data->mutex);
 857                 ret = kxcjk1013_set_odr(data, val, val2);
 858                 mutex_unlock(&data->mutex);
 859                 break;
 860         case IIO_CHAN_INFO_SCALE:
 861                 if (val)
 862                         return -EINVAL;
 863
 864                 mutex_lock(&data->mutex);
 865                 ret = kxcjk1013_set_scale(data, val2);
 866                 mutex_unlock(&data->mutex);
 867                 break;
 868         default:
 869                 ret = -EINVAL;
 870         }
 871
 872         return ret;
 873 }
 874
 875 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
 876                                    const struct iio_chan_spec *chan,
 877                                    enum iio_event_type type,
 878                                    enum iio_event_direction dir,
 879                                    enum iio_event_info info,
 880                                    int *val, int *val2)
 881 {
 882         struct kxcjk1013_data *data = iio_priv(indio_dev);
 883
 884         *val2 = 0;
 885         switch (info) {
 886         case IIO_EV_INFO_VALUE:
 887                 *val = data->wake_thres;
 888                 break;
 889         case IIO_EV_INFO_PERIOD:
 890                 *val = data->wake_dur;
 891                 break;
 892         default:
 893                 return -EINVAL;
 894         }
 895
 896         return IIO_VAL_INT;
 897 }
 898
 899 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
 900                                     const struct iio_chan_spec *chan,
 901                                     enum iio_event_type type,
 902                                     enum iio_event_direction dir,
 903                                     enum iio_event_info info,
 904                                     int val, int val2)
 905 {
 906         struct kxcjk1013_data *data = iio_priv(indio_dev);
 907
 908         if (data->ev_enable_state)
 909                 return -EBUSY;
 910
 911         switch (info) {
 912         case IIO_EV_INFO_VALUE:
 913                 data->wake_thres = val;
 914                 break;
 915         case IIO_EV_INFO_PERIOD:
 916                 data->wake_dur = val;
 917                 break;
 918         default:
 919                 return -EINVAL;
 920         }
 921
 922         return 0;
 923 }
 924
 925 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
 926                                           const struct iio_chan_spec *chan,
 927                                           enum iio_event_type type,
 928                                           enum iio_event_direction dir)
 929 {
 930         struct kxcjk1013_data *data = iio_priv(indio_dev);
 931
 932         return data->ev_enable_state;
 933 }
 934
 935 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
 936                                            const struct iio_chan_spec *chan,
 937                                            enum iio_event_type type,
 938                                            enum iio_event_direction dir,
 939                                            int state)
 940 {
 941         struct kxcjk1013_data *data = iio_priv(indio_dev);
 942         int ret;
 943
 944         if (state && data->ev_enable_state)
 945                 return 0;
 946
 947         mutex_lock(&data->mutex);
 948
 949         if (!state && data->motion_trigger_on) {
 950                 data->ev_enable_state = 0;
 951                 mutex_unlock(&data->mutex);
 952                 return 0;
 953         }
 954
 955         /*
 956          * We will expect the enable and disable to do operation in
 957          * in reverse order. This will happen here anyway as our
 958          * resume operation uses sync mode runtime pm calls, the
 959          * suspend operation will be delayed by autosuspend delay
 960          * So the disable operation will still happen in reverse of
 961          * enable operation. When runtime pm is disabled the mode
 962          * is always on so sequence doesn't matter
 963          */
 964         ret = kxcjk1013_set_power_state(data, state);
 965         if (ret < 0) {
 966                 mutex_unlock(&data->mutex);
 967                 return ret;
 968         }
 969
 970         ret =  kxcjk1013_setup_any_motion_interrupt(data, state);
 971         if (ret < 0) {
 972                 kxcjk1013_set_power_state(data, false);
 973                 data->ev_enable_state = 0;
 974                 mutex_unlock(&data->mutex);
 975                 return ret;
 976         }
 977
 978         data->ev_enable_state = state;
 979         mutex_unlock(&data->mutex);
 980
 981         return 0;
 982 }
 983
 984 static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
 985 {
 986         struct kxcjk1013_data *data = iio_priv(indio_dev);
 987
 988         return kxcjk1013_set_power_state(data, true);
 989 }
 990
 991 static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
 992 {
 993         struct kxcjk1013_data *data = iio_priv(indio_dev);
 994
 995         return kxcjk1013_set_power_state(data, false);
 996 }
 997
 998 static ssize_t kxcjk1013_get_samp_freq_avail(struct device *dev,
 999                                              struct device_attribute *attr,
1000                                              char *buf)
1001 {
1002         struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1003         struct kxcjk1013_data *data = iio_priv(indio_dev);
1004         const char *str;
1005
1006         if (data->chipset == KXTF9)
1007                 str = kxtf9_samp_freq_avail;
1008         else
1009                 str = kxcjk1013_samp_freq_avail;
1010
1011         return sprintf(buf, "%s\n", str);
1012 }
1013
1014 static IIO_DEVICE_ATTR(in_accel_sampling_frequency_available, S_IRUGO,
1015                        kxcjk1013_get_samp_freq_avail, NULL, 0);
1016
1017 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
1018
1019 static struct attribute *kxcjk1013_attributes[] = {
1020         &iio_dev_attr_in_accel_sampling_frequency_available.dev_attr.attr,
1021         &iio_const_attr_in_accel_scale_available.dev_attr.attr,
1022         NULL,
1023 };
1024
1025 static const struct attribute_group kxcjk1013_attrs_group = {
1026         .attrs = kxcjk1013_attributes,
1027 };
1028
1029 static const struct iio_event_spec kxcjk1013_event = {
1030                 .type = IIO_EV_TYPE_THRESH,
1031                 .dir = IIO_EV_DIR_EITHER,
1032                 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1033                                  BIT(IIO_EV_INFO_ENABLE) |
1034                                  BIT(IIO_EV_INFO_PERIOD)
1035 };
1036
1037 #define KXCJK1013_CHANNEL(_axis) {                                      \
1038         .type = IIO_ACCEL,                                              \
1039         .modified = 1,                                                  \
1040         .channel2 = IIO_MOD_##_axis,                                    \
1041         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),                   \
1042         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |          \
1043                                 BIT(IIO_CHAN_INFO_SAMP_FREQ),           \
1044         .scan_index = AXIS_##_axis,                                     \
1045         .scan_type = {                                                  \
1046                 .sign = 's',                                            \
1047                 .realbits = 12,                                         \
1048                 .storagebits = 16,                                      \
1049                 .shift = 4,                                             \
1050                 .endianness = IIO_LE,                                   \
1051         },                                                              \
1052         .event_spec = &kxcjk1013_event,                         \
1053         .num_event_specs = 1                                            \
1054 }
1055
1056 static const struct iio_chan_spec kxcjk1013_channels[] = {
1057         KXCJK1013_CHANNEL(X),
1058         KXCJK1013_CHANNEL(Y),
1059         KXCJK1013_CHANNEL(Z),
1060         IIO_CHAN_SOFT_TIMESTAMP(3),
1061 };
1062
1063 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
1064         .preenable              = kxcjk1013_buffer_preenable,
1065         .postenable             = iio_triggered_buffer_postenable,
1066         .postdisable            = kxcjk1013_buffer_postdisable,
1067         .predisable             = iio_triggered_buffer_predisable,
1068 };
1069
1070 static const struct iio_info kxcjk1013_info = {
1071         .attrs                  = &kxcjk1013_attrs_group,
1072         .read_raw               = kxcjk1013_read_raw,
1073         .write_raw              = kxcjk1013_write_raw,
1074         .read_event_value       = kxcjk1013_read_event,
1075         .write_event_value      = kxcjk1013_write_event,
1076         .write_event_config     = kxcjk1013_write_event_config,
1077         .read_event_config      = kxcjk1013_read_event_config,
1078 };
1079
1080 static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
1081
1082 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
1083 {
1084         struct iio_poll_func *pf = p;
1085         struct iio_dev *indio_dev = pf->indio_dev;
1086         struct kxcjk1013_data *data = iio_priv(indio_dev);
1087         int ret;
1088
1089         mutex_lock(&data->mutex);
1090         ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
1091                                                         KXCJK1013_REG_XOUT_L,
1092                                                         AXIS_MAX * 2,
1093                                                         (u8 *)data->scan.chans);
1094         mutex_unlock(&data->mutex);
1095         if (ret < 0)
1096                 goto err;
1097
1098         iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
1099                                            data->timestamp);
1100 err:
1101         iio_trigger_notify_done(indio_dev->trig);
1102
1103         return IRQ_HANDLED;
1104 }
1105
1106 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
1107 {
1108         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1109         struct kxcjk1013_data *data = iio_priv(indio_dev);
1110         int ret;
1111
1112         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1113         if (ret < 0) {
1114                 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1115                 return ret;
1116         }
1117
1118         return 0;
1119 }
1120
1121 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
1122                                                 bool state)
1123 {
1124         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1125         struct kxcjk1013_data *data = iio_priv(indio_dev);
1126         int ret;
1127
1128         mutex_lock(&data->mutex);
1129
1130         if (!state && data->ev_enable_state && data->motion_trigger_on) {
1131                 data->motion_trigger_on = false;
1132                 mutex_unlock(&data->mutex);
1133                 return 0;
1134         }
1135
1136         ret = kxcjk1013_set_power_state(data, state);
1137         if (ret < 0) {
1138                 mutex_unlock(&data->mutex);
1139                 return ret;
1140         }
1141         if (data->motion_trig == trig)
1142                 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1143         else
1144                 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1145         if (ret < 0) {
1146                 kxcjk1013_set_power_state(data, false);
1147                 mutex_unlock(&data->mutex);
1148                 return ret;
1149         }
1150         if (data->motion_trig == trig)
1151                 data->motion_trigger_on = state;
1152         else
1153                 data->dready_trigger_on = state;
1154
1155         mutex_unlock(&data->mutex);
1156
1157         return 0;
1158 }
1159
1160 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1161         .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1162         .try_reenable = kxcjk1013_trig_try_reen,
1163 };
1164
1165 static void kxcjk1013_report_motion_event(struct iio_dev *indio_dev)
1166 {
1167         struct kxcjk1013_data *data = iio_priv(indio_dev);
1168
1169         int ret = i2c_smbus_read_byte_data(data->client,
1170                                            KXCJK1013_REG_INT_SRC2);
1171         if (ret < 0) {
1172                 dev_err(&data->client->dev, "Error reading reg_int_src2\n");
1173                 return;
1174         }
1175
1176         if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1177                 iio_push_event(indio_dev,
1178                                IIO_MOD_EVENT_CODE(IIO_ACCEL,
1179                                                   0,
1180                                                   IIO_MOD_X,
1181                                                   IIO_EV_TYPE_THRESH,
1182                                                   IIO_EV_DIR_FALLING),
1183                                data->timestamp);
1184
1185         if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1186                 iio_push_event(indio_dev,
1187                                IIO_MOD_EVENT_CODE(IIO_ACCEL,
1188                                                   0,
1189                                                   IIO_MOD_X,
1190                                                   IIO_EV_TYPE_THRESH,
1191                                                   IIO_EV_DIR_RISING),
1192                                data->timestamp);
1193
1194         if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1195                 iio_push_event(indio_dev,
1196                                IIO_MOD_EVENT_CODE(IIO_ACCEL,
1197                                                   0,
1198                                                   IIO_MOD_Y,
1199                                                   IIO_EV_TYPE_THRESH,
1200                                                   IIO_EV_DIR_FALLING),
1201                                data->timestamp);
1202
1203         if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1204                 iio_push_event(indio_dev,
1205                                IIO_MOD_EVENT_CODE(IIO_ACCEL,
1206                                                   0,
1207                                                   IIO_MOD_Y,
1208                                                   IIO_EV_TYPE_THRESH,
1209                                                   IIO_EV_DIR_RISING),
1210                                data->timestamp);
1211
1212         if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1213                 iio_push_event(indio_dev,
1214                                IIO_MOD_EVENT_CODE(IIO_ACCEL,
1215                                                   0,
1216                                                   IIO_MOD_Z,
1217                                                   IIO_EV_TYPE_THRESH,
1218                                                   IIO_EV_DIR_FALLING),
1219                                data->timestamp);
1220
1221         if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1222                 iio_push_event(indio_dev,
1223                                IIO_MOD_EVENT_CODE(IIO_ACCEL,
1224                                                   0,
1225                                                   IIO_MOD_Z,
1226                                                   IIO_EV_TYPE_THRESH,
1227                                                   IIO_EV_DIR_RISING),
1228                                data->timestamp);
1229 }
1230
1231 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1232 {
1233         struct iio_dev *indio_dev = private;
1234         struct kxcjk1013_data *data = iio_priv(indio_dev);
1235         int ret;
1236
1237         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1238         if (ret < 0) {
1239                 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1240                 goto ack_intr;
1241         }
1242
1243         if (ret & KXCJK1013_REG_INT_SRC1_BIT_WUFS) {
1244                 if (data->chipset == KXTF9)
1245                         iio_push_event(indio_dev,
1246                                        IIO_MOD_EVENT_CODE(IIO_ACCEL,
1247                                        0,
1248                                        IIO_MOD_X_AND_Y_AND_Z,
1249                                        IIO_EV_TYPE_THRESH,
1250                                        IIO_EV_DIR_RISING),
1251                                        data->timestamp);
1252                 else
1253                         kxcjk1013_report_motion_event(indio_dev);
1254         }
1255
1256 ack_intr:
1257         if (data->dready_trigger_on)
1258                 return IRQ_HANDLED;
1259
1260         ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1261         if (ret < 0)
1262                 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1263
1264         return IRQ_HANDLED;
1265 }
1266
1267 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1268 {
1269         struct iio_dev *indio_dev = private;
1270         struct kxcjk1013_data *data = iio_priv(indio_dev);
1271
1272         data->timestamp = iio_get_time_ns(indio_dev);
1273
1274         if (data->dready_trigger_on)
1275                 iio_trigger_poll(data->dready_trig);
1276         else if (data->motion_trigger_on)
1277                 iio_trigger_poll(data->motion_trig);
1278
1279         if (data->ev_enable_state)
1280                 return IRQ_WAKE_THREAD;
1281         else
1282                 return IRQ_HANDLED;
1283 }
1284
1285 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1286                                                enum kx_chipset *chipset,
1287                                                enum kx_acpi_type *acpi_type)
1288 {
1289         const struct acpi_device_id *id;
1290
1291         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1292         if (!id)
1293                 return NULL;
1294
1295         if (strcmp(id->id, "SMO8500") == 0)
1296                 *acpi_type = ACPI_SMO8500;
1297         else if (strcmp(id->id, "KIOX010A") == 0)
1298                 *acpi_type = ACPI_KIOX010A;
1299
1300         *chipset = (enum kx_chipset)id->driver_data;
1301
1302         return dev_name(dev);
1303 }
1304
1305 static int kxcjk1013_probe(struct i2c_client *client,
1306                            const struct i2c_device_id *id)
1307 {
1308         struct kxcjk1013_data *data;
1309         struct iio_dev *indio_dev;
1310         struct kxcjk_1013_platform_data *pdata;
1311         const char *name;
1312         int ret;
1313
1314         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1315         if (!indio_dev)
1316                 return -ENOMEM;
1317
1318         data = iio_priv(indio_dev);
1319         i2c_set_clientdata(client, indio_dev);
1320         data->client = client;
1321
1322         pdata = dev_get_platdata(&client->dev);
1323         if (pdata)
1324                 data->active_high_intr = pdata->active_high_intr;
1325         else
1326                 data->active_high_intr = true; /* default polarity */
1327
1328         if (id) {
1329                 data->chipset = (enum kx_chipset)(id->driver_data);
1330                 name = id->name;
1331         } else if (ACPI_HANDLE(&client->dev)) {
1332                 name = kxcjk1013_match_acpi_device(&client->dev,
1333                                                    &data->chipset,
1334                                                    &data->acpi_type);
1335         } else
1336                 return -ENODEV;
1337
1338         ret = kxcjk1013_chip_init(data);
1339         if (ret < 0)
1340                 return ret;
1341
1342         mutex_init(&data->mutex);
1343
1344         indio_dev->dev.parent = &client->dev;
1345         indio_dev->channels = kxcjk1013_channels;
1346         indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1347         indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1348         indio_dev->name = name;
1349         indio_dev->modes = INDIO_DIRECT_MODE;
1350         indio_dev->info = &kxcjk1013_info;
1351
1352         if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
1353                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1354                                                 kxcjk1013_data_rdy_trig_poll,
1355                                                 kxcjk1013_event_handler,
1356                                                 IRQF_TRIGGER_RISING,
1357                                                 KXCJK1013_IRQ_NAME,
1358                                                 indio_dev);
1359                 if (ret)
1360                         goto err_poweroff;
1361
1362                 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1363                                                            "%s-dev%d",
1364                                                            indio_dev->name,
1365                                                            indio_dev->id);
1366                 if (!data->dready_trig) {
1367                         ret = -ENOMEM;
1368                         goto err_poweroff;
1369                 }
1370
1371                 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1372                                                           "%s-any-motion-dev%d",
1373                                                           indio_dev->name,
1374                                                           indio_dev->id);
1375                 if (!data->motion_trig) {
1376                         ret = -ENOMEM;
1377                         goto err_poweroff;
1378                 }
1379
1380                 data->dready_trig->dev.parent = &client->dev;
1381                 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1382                 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1383                 indio_dev->trig = data->dready_trig;
1384                 iio_trigger_get(indio_dev->trig);
1385                 ret = iio_trigger_register(data->dready_trig);
1386                 if (ret)
1387                         goto err_poweroff;
1388
1389                 data->motion_trig->dev.parent = &client->dev;
1390                 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1391                 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1392                 ret = iio_trigger_register(data->motion_trig);
1393                 if (ret) {
1394                         data->motion_trig = NULL;
1395                         goto err_trigger_unregister;
1396                 }
1397         }
1398
1399         ret = iio_triggered_buffer_setup(indio_dev,
1400                                          &iio_pollfunc_store_time,
1401                                          kxcjk1013_trigger_handler,
1402                                          &kxcjk1013_buffer_setup_ops);
1403         if (ret < 0) {
1404                 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1405                 goto err_trigger_unregister;
1406         }
1407
1408         ret = pm_runtime_set_active(&client->dev);
1409         if (ret)
1410                 goto err_buffer_cleanup;
1411
1412         pm_runtime_enable(&client->dev);
1413         pm_runtime_set_autosuspend_delay(&client->dev,
1414                                          KXCJK1013_SLEEP_DELAY_MS);
1415         pm_runtime_use_autosuspend(&client->dev);
1416
1417         ret = iio_device_register(indio_dev);
1418         if (ret < 0) {
1419                 dev_err(&client->dev, "unable to register iio device\n");
1420                 goto err_buffer_cleanup;
1421         }
1422
1423         return 0;
1424
1425 err_buffer_cleanup:
1426         iio_triggered_buffer_cleanup(indio_dev);
1427 err_trigger_unregister:
1428         if (data->dready_trig)
1429                 iio_trigger_unregister(data->dready_trig);
1430         if (data->motion_trig)
1431                 iio_trigger_unregister(data->motion_trig);
1432 err_poweroff:
1433         kxcjk1013_set_mode(data, STANDBY);
1434
1435         return ret;
1436 }
1437
1438 static int kxcjk1013_remove(struct i2c_client *client)
1439 {
1440         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1441         struct kxcjk1013_data *data = iio_priv(indio_dev);
1442
1443         iio_device_unregister(indio_dev);
1444
1445         pm_runtime_disable(&client->dev);
1446         pm_runtime_set_suspended(&client->dev);
1447         pm_runtime_put_noidle(&client->dev);
1448
1449         iio_triggered_buffer_cleanup(indio_dev);
1450         if (data->dready_trig) {
1451                 iio_trigger_unregister(data->dready_trig);
1452                 iio_trigger_unregister(data->motion_trig);
1453         }
1454
1455         mutex_lock(&data->mutex);
1456         kxcjk1013_set_mode(data, STANDBY);
1457         mutex_unlock(&data->mutex);
1458
1459         return 0;
1460 }
1461
1462 #ifdef CONFIG_PM_SLEEP
1463 static int kxcjk1013_suspend(struct device *dev)
1464 {
1465         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1466         struct kxcjk1013_data *data = iio_priv(indio_dev);
1467         int ret;
1468
1469         mutex_lock(&data->mutex);
1470         ret = kxcjk1013_set_mode(data, STANDBY);
1471         mutex_unlock(&data->mutex);
1472
1473         return ret;
1474 }
1475
1476 static int kxcjk1013_resume(struct device *dev)
1477 {
1478         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1479         struct kxcjk1013_data *data = iio_priv(indio_dev);
1480         int ret = 0;
1481
1482         mutex_lock(&data->mutex);
1483         ret = kxcjk1013_set_mode(data, OPERATION);
1484         if (ret == 0)
1485                 ret = kxcjk1013_set_range(data, data->range);
1486         mutex_unlock(&data->mutex);
1487
1488         return ret;
1489 }
1490 #endif
1491
1492 #ifdef CONFIG_PM
1493 static int kxcjk1013_runtime_suspend(struct device *dev)
1494 {
1495         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1496         struct kxcjk1013_data *data = iio_priv(indio_dev);
1497         int ret;
1498
1499         ret = kxcjk1013_set_mode(data, STANDBY);
1500         if (ret < 0) {
1501                 dev_err(&data->client->dev, "powering off device failed\n");
1502                 return -EAGAIN;
1503         }
1504         return 0;
1505 }
1506
1507 static int kxcjk1013_runtime_resume(struct device *dev)
1508 {
1509         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1510         struct kxcjk1013_data *data = iio_priv(indio_dev);
1511         int ret;
1512         int sleep_val;
1513
1514         ret = kxcjk1013_set_mode(data, OPERATION);
1515         if (ret < 0)
1516                 return ret;
1517
1518         sleep_val = kxcjk1013_get_startup_times(data);
1519         if (sleep_val < 20000)
1520                 usleep_range(sleep_val, 20000);
1521         else
1522                 msleep_interruptible(sleep_val/1000);
1523
1524         return 0;
1525 }
1526 #endif
1527
1528 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1529         SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1530         SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1531                            kxcjk1013_runtime_resume, NULL)
1532 };
1533
1534 static const struct acpi_device_id kx_acpi_match[] = {
1535         {"KXCJ1013", KXCJK1013},
1536         {"KXCJ1008", KXCJ91008},
1537         {"KXCJ9000", KXCJ91008},
1538         {"KIOX000A", KXCJ91008},
1539         {"KIOX010A", KXCJ91008}, /* KXCJ91008 inside the display of a 2-in-1 */
1540         {"KXTJ1009", KXTJ21009},
1541         {"SMO8500",  KXCJ91008},
1542         { },
1543 };
1544 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1545
1546 static const struct i2c_device_id kxcjk1013_id[] = {
1547         {"kxcjk1013", KXCJK1013},
1548         {"kxcj91008", KXCJ91008},
1549         {"kxtj21009", KXTJ21009},
1550         {"kxtf9",     KXTF9},
1551         {"SMO8500",   KXCJ91008},
1552         {}
1553 };
1554
1555 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1556
1557 static struct i2c_driver kxcjk1013_driver = {
1558         .driver = {
1559                 .name   = KXCJK1013_DRV_NAME,
1560                 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1561                 .pm     = &kxcjk1013_pm_ops,
1562         },
1563         .probe          = kxcjk1013_probe,
1564         .remove         = kxcjk1013_remove,
1565         .id_table       = kxcjk1013_id,
1566 };
1567 module_i2c_driver(kxcjk1013_driver);
1568
1569 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1570 MODULE_LICENSE("GPL v2");
1571 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");