drivers/iio/accel/mma9553.c

   1 /*
   2  * Freescale MMA9553L Intelligent Pedometer 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/slab.h>
  19 #include <linux/acpi.h>
  20 #include <linux/gpio/consumer.h>
  21 #include <linux/iio/iio.h>
  22 #include <linux/iio/sysfs.h>
  23 #include <linux/iio/events.h>
  24 #include <linux/pm_runtime.h>
  25 #include "mma9551_core.h"
  26
  27 #define MMA9553_DRV_NAME                        "mma9553"
  28 #define MMA9553_IRQ_NAME                        "mma9553_event"
  29 #define MMA9553_GPIO_NAME                       "mma9553_int"
  30
  31 /* Pedometer configuration registers (R/W) */
  32 #define MMA9553_REG_CONF_SLEEPMIN               0x00
  33 #define MMA9553_REG_CONF_SLEEPMAX               0x02
  34 #define MMA9553_REG_CONF_SLEEPTHD               0x04
  35 #define MMA9553_MASK_CONF_WORD                  GENMASK(15, 0)
  36
  37 #define MMA9553_REG_CONF_CONF_STEPLEN           0x06
  38 #define MMA9553_MASK_CONF_CONFIG                BIT(15)
  39 #define MMA9553_MASK_CONF_ACT_DBCNTM            BIT(14)
  40 #define MMA9553_MASK_CONF_SLP_DBCNTM            BIT(13)
  41 #define MMA9553_MASK_CONF_STEPLEN               GENMASK(7, 0)
  42
  43 #define MMA9553_REG_CONF_HEIGHT_WEIGHT          0x08
  44 #define MMA9553_MASK_CONF_HEIGHT                GENMASK(15, 8)
  45 #define MMA9553_MASK_CONF_WEIGHT                GENMASK(7, 0)
  46
  47 #define MMA9553_REG_CONF_FILTER                 0x0A
  48 #define MMA9553_MASK_CONF_FILTSTEP              GENMASK(15, 8)
  49 #define MMA9553_MASK_CONF_MALE                  BIT(7)
  50 #define MMA9553_MASK_CONF_FILTTIME              GENMASK(6, 0)
  51
  52 #define MMA9553_REG_CONF_SPEED_STEP             0x0C
  53 #define MMA9553_MASK_CONF_SPDPRD                GENMASK(15, 8)
  54 #define MMA9553_MASK_CONF_STEPCOALESCE          GENMASK(7, 0)
  55
  56 #define MMA9553_REG_CONF_ACTTHD                 0x0E
  57
  58 /* Pedometer status registers (R-only) */
  59 #define MMA9553_REG_STATUS                      0x00
  60 #define MMA9553_MASK_STATUS_MRGFL               BIT(15)
  61 #define MMA9553_MASK_STATUS_SUSPCHG             BIT(14)
  62 #define MMA9553_MASK_STATUS_STEPCHG             BIT(13)
  63 #define MMA9553_MASK_STATUS_ACTCHG              BIT(12)
  64 #define MMA9553_MASK_STATUS_SUSP                BIT(11)
  65 #define MMA9553_MASK_STATUS_ACTIVITY            (BIT(10) | BIT(9) | BIT(8))
  66 #define MMA9553_MASK_STATUS_VERSION             0x00FF
  67
  68 #define MMA9553_REG_STEPCNT                     0x02
  69 #define MMA9553_REG_DISTANCE                    0x04
  70 #define MMA9553_REG_SPEED                       0x06
  71 #define MMA9553_REG_CALORIES                    0x08
  72 #define MMA9553_REG_SLEEPCNT                    0x0A
  73
  74 /* Pedometer events are always mapped to this pin. */
  75 #define MMA9553_DEFAULT_GPIO_PIN        mma9551_gpio6
  76 #define MMA9553_DEFAULT_GPIO_POLARITY   0
  77
  78 /* Bitnum used for gpio configuration = bit number in high status byte */
  79 #define STATUS_TO_BITNUM(bit)           (ffs(bit) - 9)
  80
  81 #define MMA9553_DEFAULT_SAMPLE_RATE     30      /* Hz */
  82
  83 /*
  84  * The internal activity level must be stable for ACTTHD samples before
  85  * ACTIVITY is updated.The ACTIVITY variable contains the current activity
  86  * level and is updated every time a step is detected or once a second
  87  * if there are no steps.
  88  */
  89 #define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
  90 #define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
  91
  92 /*
  93  * Autonomously suspend pedometer if acceleration vector magnitude
  94  * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
  95  */
  96 #define MMA9553_DEFAULT_SLEEPMIN        3688    /* 0,9 g */
  97 #define MMA9553_DEFAULT_SLEEPMAX        4508    /* 1,1 g */
  98 #define MMA9553_DEFAULT_SLEEPTHD        (MMA9553_DEFAULT_SAMPLE_RATE * 30)
  99
 100 #define MMA9553_CONFIG_RETRIES          2
 101
 102 /* Status register - activity field  */
 103 enum activity_level {
 104         ACTIVITY_UNKNOWN,
 105         ACTIVITY_REST,
 106         ACTIVITY_WALKING,
 107         ACTIVITY_JOGGING,
 108         ACTIVITY_RUNNING,
 109 };
 110
 111 static struct mma9553_event_info {
 112         enum iio_chan_type type;
 113         enum iio_modifier mod;
 114         enum iio_event_direction dir;
 115 } mma9553_events_info[] = {
 116         {
 117                 .type = IIO_STEPS,
 118                 .mod = IIO_NO_MOD,
 119                 .dir = IIO_EV_DIR_NONE,
 120         },
 121         {
 122                 .type = IIO_ACTIVITY,
 123                 .mod = IIO_MOD_STILL,
 124                 .dir = IIO_EV_DIR_RISING,
 125         },
 126         {
 127                 .type = IIO_ACTIVITY,
 128                 .mod = IIO_MOD_STILL,
 129                 .dir = IIO_EV_DIR_FALLING,
 130         },
 131         {
 132                 .type = IIO_ACTIVITY,
 133                 .mod = IIO_MOD_WALKING,
 134                 .dir = IIO_EV_DIR_RISING,
 135         },
 136         {
 137                 .type = IIO_ACTIVITY,
 138                 .mod = IIO_MOD_WALKING,
 139                 .dir = IIO_EV_DIR_FALLING,
 140         },
 141         {
 142                 .type = IIO_ACTIVITY,
 143                 .mod = IIO_MOD_JOGGING,
 144                 .dir = IIO_EV_DIR_RISING,
 145         },
 146         {
 147                 .type = IIO_ACTIVITY,
 148                 .mod = IIO_MOD_JOGGING,
 149                 .dir = IIO_EV_DIR_FALLING,
 150         },
 151         {
 152                 .type = IIO_ACTIVITY,
 153                 .mod = IIO_MOD_RUNNING,
 154                 .dir = IIO_EV_DIR_RISING,
 155         },
 156         {
 157                 .type = IIO_ACTIVITY,
 158                 .mod = IIO_MOD_RUNNING,
 159                 .dir = IIO_EV_DIR_FALLING,
 160         },
 161 };
 162
 163 #define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
 164
 165 struct mma9553_event {
 166         struct mma9553_event_info *info;
 167         bool enabled;
 168 };
 169
 170 struct mma9553_conf_regs {
 171         u16 sleepmin;
 172         u16 sleepmax;
 173         u16 sleepthd;
 174         u16 config;
 175         u16 height_weight;
 176         u16 filter;
 177         u16 speed_step;
 178         u16 actthd;
 179 } __packed;
 180
 181 struct mma9553_data {
 182         struct i2c_client *client;
 183         struct mutex mutex;
 184         struct mma9553_conf_regs conf;
 185         struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
 186         int num_events;
 187         u8 gpio_bitnum;
 188         /*
 189          * This is used for all features that depend on step count:
 190          * step count, distance, speed, calories.
 191          */
 192         bool stepcnt_enabled;
 193         u16 stepcnt;
 194         u8 activity;
 195         s64 timestamp;
 196 };
 197
 198 static u8 mma9553_get_bits(u16 val, u16 mask)
 199 {
 200         return (val & mask) >> (ffs(mask) - 1);
 201 }
 202
 203 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
 204 {
 205         return (current_val & ~mask) | (val << (ffs(mask) - 1));
 206 }
 207
 208 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
 209 {
 210         switch (activity) {
 211         case ACTIVITY_RUNNING:
 212                 return IIO_MOD_RUNNING;
 213         case ACTIVITY_JOGGING:
 214                 return IIO_MOD_JOGGING;
 215         case ACTIVITY_WALKING:
 216                 return IIO_MOD_WALKING;
 217         case ACTIVITY_REST:
 218                 return IIO_MOD_STILL;
 219         case ACTIVITY_UNKNOWN:
 220         default:
 221                 return IIO_NO_MOD;
 222         }
 223 }
 224
 225 static void mma9553_init_events(struct mma9553_data *data)
 226 {
 227         int i;
 228
 229         data->num_events = MMA9553_EVENTS_INFO_SIZE;
 230         for (i = 0; i < data->num_events; i++) {
 231                 data->events[i].info = &mma9553_events_info[i];
 232                 data->events[i].enabled = false;
 233         }
 234 }
 235
 236 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
 237                                                enum iio_chan_type type,
 238                                                enum iio_modifier mod,
 239                                                enum iio_event_direction dir)
 240 {
 241         int i;
 242
 243         for (i = 0; i < data->num_events; i++)
 244                 if (data->events[i].info->type == type &&
 245                     data->events[i].info->mod == mod &&
 246                     data->events[i].info->dir == dir)
 247                         return &data->events[i];
 248
 249         return NULL;
 250 }
 251
 252 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
 253                                          bool check_type,
 254                                          enum iio_chan_type type)
 255 {
 256         int i;
 257
 258         for (i = 0; i < data->num_events; i++)
 259                 if ((check_type && data->events[i].info->type == type &&
 260                      data->events[i].enabled) ||
 261                      (!check_type && data->events[i].enabled))
 262                         return true;
 263
 264         return false;
 265 }
 266
 267 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
 268                               u16 *p_reg_val, u16 val, u16 mask)
 269 {
 270         int ret, retries;
 271         u16 reg_val, config;
 272
 273         reg_val = *p_reg_val;
 274         if (val == mma9553_get_bits(reg_val, mask))
 275                 return 0;
 276
 277         reg_val = mma9553_set_bits(reg_val, val, mask);
 278         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 279                                         reg, reg_val);
 280         if (ret < 0) {
 281                 dev_err(&data->client->dev,
 282                         "error writing config register 0x%x\n", reg);
 283                 return ret;
 284         }
 285
 286         *p_reg_val = reg_val;
 287
 288         /* Reinitializes the pedometer with current configuration values */
 289         config = mma9553_set_bits(data->conf.config, 1,
 290                                   MMA9553_MASK_CONF_CONFIG);
 291
 292         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 293                                         MMA9553_REG_CONF_CONF_STEPLEN, config);
 294         if (ret < 0) {
 295                 dev_err(&data->client->dev,
 296                         "error writing config register 0x%x\n",
 297                         MMA9553_REG_CONF_CONF_STEPLEN);
 298                 return ret;
 299         }
 300
 301         retries = MMA9553_CONFIG_RETRIES;
 302         do {
 303                 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
 304                 ret = mma9551_read_config_word(data->client,
 305                                                MMA9551_APPID_PEDOMETER,
 306                                                MMA9553_REG_CONF_CONF_STEPLEN,
 307                                                &config);
 308                 if (ret < 0)
 309                         return ret;
 310         } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
 311                  --retries > 0);
 312
 313         return 0;
 314 }
 315
 316 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
 317                                          u8 *activity, u16 *stepcnt)
 318 {
 319         u32 status_stepcnt;
 320         u16 status;
 321         int ret;
 322
 323         ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
 324                                         MMA9553_REG_STATUS, sizeof(u32),
 325                                         (u16 *) &status_stepcnt);
 326         if (ret < 0) {
 327                 dev_err(&data->client->dev,
 328                         "error reading status and stepcnt\n");
 329                 return ret;
 330         }
 331
 332         status = status_stepcnt & MMA9553_MASK_CONF_WORD;
 333         *activity = mma9553_get_bits(status, MMA9553_MASK_STATUS_ACTIVITY);
 334         *stepcnt = status_stepcnt >> 16;
 335
 336         return 0;
 337 }
 338
 339 static int mma9553_conf_gpio(struct mma9553_data *data)
 340 {
 341         u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
 342         int ret;
 343         struct mma9553_event *ev_step_detect;
 344         bool activity_enabled;
 345
 346         activity_enabled =
 347             mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
 348         ev_step_detect =
 349             mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
 350
 351         /*
 352          * If both step detector and activity are enabled, use the MRGFL bit.
 353          * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
 354          */
 355         if (activity_enabled && ev_step_detect->enabled)
 356                 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
 357         else if (ev_step_detect->enabled)
 358                 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
 359         else if (activity_enabled)
 360                 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
 361         else                    /* Reset */
 362                 appid = MMA9551_APPID_NONE;
 363
 364         if (data->gpio_bitnum == bitnum)
 365                 return 0;
 366
 367         /* Save initial values for activity and stepcnt */
 368         if (activity_enabled || ev_step_detect->enabled)
 369                 mma9553_read_activity_stepcnt(data, &data->activity,
 370                                               &data->stepcnt);
 371
 372         ret = mma9551_gpio_config(data->client,
 373                                   MMA9553_DEFAULT_GPIO_PIN,
 374                                   appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
 375         if (ret < 0)
 376                 return ret;
 377         data->gpio_bitnum = bitnum;
 378
 379         return 0;
 380 }
 381
 382 static int mma9553_init(struct mma9553_data *data)
 383 {
 384         int ret;
 385
 386         ret = mma9551_read_version(data->client);
 387         if (ret)
 388                 return ret;
 389
 390         /*
 391          * Read all the pedometer configuration registers. This is used as
 392          * a device identification command to differentiate the MMA9553L
 393          * from the MMA9550L.
 394          */
 395         ret =
 396             mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
 397                                       MMA9553_REG_CONF_SLEEPMIN,
 398                                       sizeof(data->conf), (u16 *) &data->conf);
 399         if (ret < 0) {
 400                 dev_err(&data->client->dev,
 401                         "device is not MMA9553L: failed to read cfg regs\n");
 402                 return ret;
 403         }
 404
 405
 406         /* Reset gpio */
 407         data->gpio_bitnum = -1;
 408         ret = mma9553_conf_gpio(data);
 409         if (ret < 0)
 410                 return ret;
 411
 412         ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
 413         if (ret < 0)
 414                 return ret;
 415
 416         /* Init config registers */
 417         data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
 418         data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
 419         data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
 420         data->conf.config =
 421             mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG);
 422         /*
 423          * Clear the activity debounce counter when the activity level changes,
 424          * so that the confidence level applies for any activity level.
 425          */
 426         data->conf.config = mma9553_set_bits(data->conf.config, 1,
 427                                              MMA9553_MASK_CONF_ACT_DBCNTM);
 428         ret =
 429             mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
 430                                        MMA9553_REG_CONF_SLEEPMIN,
 431                                        sizeof(data->conf), (u16 *) &data->conf);
 432         if (ret < 0) {
 433                 dev_err(&data->client->dev,
 434                         "failed to write configuration registers\n");
 435                 return ret;
 436         }
 437
 438         return mma9551_set_device_state(data->client, true);
 439 }
 440
 441 static int mma9553_read_raw(struct iio_dev *indio_dev,
 442                             struct iio_chan_spec const *chan,
 443                             int *val, int *val2, long mask)
 444 {
 445         struct mma9553_data *data = iio_priv(indio_dev);
 446         int ret;
 447         u16 tmp;
 448         u8 activity;
 449         bool powered_on;
 450
 451         switch (mask) {
 452         case IIO_CHAN_INFO_PROCESSED:
 453                 switch (chan->type) {
 454                 case IIO_STEPS:
 455                         /*
 456                          * The HW only counts steps and other dependent
 457                          * parameters (speed, distance, calories, activity)
 458                          * if power is on (from enabling an event or the
 459                          * step counter */
 460                         powered_on =
 461                             mma9553_is_any_event_enabled(data, false, 0) ||
 462                             data->stepcnt_enabled;
 463                         if (!powered_on) {
 464                                 dev_err(&data->client->dev,
 465                                         "No channels enabled\n");
 466                                 return -EINVAL;
 467                         }
 468                         mutex_lock(&data->mutex);
 469                         ret = mma9551_read_status_word(data->client,
 470                                                        MMA9551_APPID_PEDOMETER,
 471                                                        MMA9553_REG_STEPCNT,
 472                                                        &tmp);
 473                         mutex_unlock(&data->mutex);
 474                         if (ret < 0)
 475                                 return ret;
 476                         *val = tmp;
 477                         return IIO_VAL_INT;
 478                 case IIO_DISTANCE:
 479                         powered_on =
 480                             mma9553_is_any_event_enabled(data, false, 0) ||
 481                             data->stepcnt_enabled;
 482                         if (!powered_on) {
 483                                 dev_err(&data->client->dev,
 484                                         "No channels enabled\n");
 485                                 return -EINVAL;
 486                         }
 487                         mutex_lock(&data->mutex);
 488                         ret = mma9551_read_status_word(data->client,
 489                                                        MMA9551_APPID_PEDOMETER,
 490                                                        MMA9553_REG_DISTANCE,
 491                                                        &tmp);
 492                         mutex_unlock(&data->mutex);
 493                         if (ret < 0)
 494                                 return ret;
 495                         *val = tmp;
 496                         return IIO_VAL_INT;
 497                 case IIO_ACTIVITY:
 498                         powered_on =
 499                             mma9553_is_any_event_enabled(data, false, 0) ||
 500                             data->stepcnt_enabled;
 501                         if (!powered_on) {
 502                                 dev_err(&data->client->dev,
 503                                         "No channels enabled\n");
 504                                 return -EINVAL;
 505                         }
 506                         mutex_lock(&data->mutex);
 507                         ret = mma9551_read_status_word(data->client,
 508                                                        MMA9551_APPID_PEDOMETER,
 509                                                        MMA9553_REG_STATUS,
 510                                                        &tmp);
 511                         mutex_unlock(&data->mutex);
 512                         if (ret < 0)
 513                                 return ret;
 514
 515                         activity =
 516                             mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
 517
 518                         /*
 519                          * The device does not support confidence value levels,
 520                          * so we will always have 100% for current activity and
 521                          * 0% for the others.
 522                          */
 523                         if (chan->channel2 == mma9553_activity_to_mod(activity))
 524                                 *val = 100;
 525                         else
 526                                 *val = 0;
 527                         return IIO_VAL_INT;
 528                 default:
 529                         return -EINVAL;
 530                 }
 531         case IIO_CHAN_INFO_RAW:
 532                 switch (chan->type) {
 533                 case IIO_VELOCITY:      /* m/h */
 534                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 535                                 return -EINVAL;
 536                         powered_on =
 537                             mma9553_is_any_event_enabled(data, false, 0) ||
 538                             data->stepcnt_enabled;
 539                         if (!powered_on) {
 540                                 dev_err(&data->client->dev,
 541                                         "No channels enabled\n");
 542                                 return -EINVAL;
 543                         }
 544                         mutex_lock(&data->mutex);
 545                         ret = mma9551_read_status_word(data->client,
 546                                                        MMA9551_APPID_PEDOMETER,
 547                                                        MMA9553_REG_SPEED, &tmp);
 548                         mutex_unlock(&data->mutex);
 549                         if (ret < 0)
 550                                 return ret;
 551                         *val = tmp;
 552                         return IIO_VAL_INT;
 553                 case IIO_ENERGY:        /* Cal or kcal */
 554                         powered_on =
 555                             mma9553_is_any_event_enabled(data, false, 0) ||
 556                             data->stepcnt_enabled;
 557                         if (!powered_on) {
 558                                 dev_err(&data->client->dev,
 559                                         "No channels enabled\n");
 560                                 return -EINVAL;
 561                         }
 562                         mutex_lock(&data->mutex);
 563                         ret = mma9551_read_status_word(data->client,
 564                                                        MMA9551_APPID_PEDOMETER,
 565                                                        MMA9553_REG_CALORIES,
 566                                                        &tmp);
 567                         mutex_unlock(&data->mutex);
 568                         if (ret < 0)
 569                                 return ret;
 570                         *val = tmp;
 571                         return IIO_VAL_INT;
 572                 case IIO_ACCEL:
 573                         mutex_lock(&data->mutex);
 574                         ret = mma9551_read_accel_chan(data->client,
 575                                                       chan, val, val2);
 576                         mutex_unlock(&data->mutex);
 577                         return ret;
 578                 default:
 579                         return -EINVAL;
 580                 }
 581         case IIO_CHAN_INFO_SCALE:
 582                 switch (chan->type) {
 583                 case IIO_VELOCITY:      /* m/h to m/s */
 584                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 585                                 return -EINVAL;
 586                         *val = 0;
 587                         *val2 = 277;    /* 0.000277 */
 588                         return IIO_VAL_INT_PLUS_MICRO;
 589                 case IIO_ENERGY:        /* Cal or kcal to J */
 590                         *val = 4184;
 591                         return IIO_VAL_INT;
 592                 case IIO_ACCEL:
 593                         return mma9551_read_accel_scale(val, val2);
 594                 default:
 595                         return -EINVAL;
 596                 }
 597         case IIO_CHAN_INFO_ENABLE:
 598                 *val = data->stepcnt_enabled;
 599                 return IIO_VAL_INT;
 600         case IIO_CHAN_INFO_CALIBHEIGHT:
 601                 tmp = mma9553_get_bits(data->conf.height_weight,
 602                                         MMA9553_MASK_CONF_HEIGHT);
 603                 *val = tmp / 100;       /* cm to m */
 604                 *val2 = (tmp % 100) * 10000;
 605                 return IIO_VAL_INT_PLUS_MICRO;
 606         case IIO_CHAN_INFO_CALIBWEIGHT:
 607                 *val = mma9553_get_bits(data->conf.height_weight,
 608                                         MMA9553_MASK_CONF_WEIGHT);
 609                 return IIO_VAL_INT;
 610         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 611                 switch (chan->type) {
 612                 case IIO_STEPS:
 613                         *val = mma9553_get_bits(data->conf.filter,
 614                                                 MMA9553_MASK_CONF_FILTSTEP);
 615                         return IIO_VAL_INT;
 616                 default:
 617                         return -EINVAL;
 618                 }
 619         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 620                 switch (chan->type) {
 621                 case IIO_STEPS:
 622                         *val = mma9553_get_bits(data->conf.filter,
 623                                                 MMA9553_MASK_CONF_FILTTIME);
 624                         return IIO_VAL_INT;
 625                 default:
 626                         return -EINVAL;
 627                 }
 628         case IIO_CHAN_INFO_INT_TIME:
 629                 switch (chan->type) {
 630                 case IIO_VELOCITY:
 631                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 632                                 return -EINVAL;
 633                         *val = mma9553_get_bits(data->conf.speed_step,
 634                                                 MMA9553_MASK_CONF_SPDPRD);
 635                         return IIO_VAL_INT;
 636                 default:
 637                         return -EINVAL;
 638                 }
 639         default:
 640                 return -EINVAL;
 641         }
 642 }
 643
 644 static int mma9553_write_raw(struct iio_dev *indio_dev,
 645                              struct iio_chan_spec const *chan,
 646                              int val, int val2, long mask)
 647 {
 648         struct mma9553_data *data = iio_priv(indio_dev);
 649         int ret, tmp;
 650
 651         switch (mask) {
 652         case IIO_CHAN_INFO_ENABLE:
 653                 if (data->stepcnt_enabled == !!val)
 654                         return 0;
 655                 mutex_lock(&data->mutex);
 656                 ret = mma9551_set_power_state(data->client, val);
 657                 if (ret < 0) {
 658                         mutex_unlock(&data->mutex);
 659                         return ret;
 660                 }
 661                 data->stepcnt_enabled = val;
 662                 mutex_unlock(&data->mutex);
 663                 return 0;
 664         case IIO_CHAN_INFO_CALIBHEIGHT:
 665                 /* m to cm */
 666                 tmp = val * 100 + val2 / 10000;
 667                 if (tmp < 0 || tmp > 255)
 668                         return -EINVAL;
 669                 mutex_lock(&data->mutex);
 670                 ret = mma9553_set_config(data,
 671                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 672                                          &data->conf.height_weight,
 673                                          tmp, MMA9553_MASK_CONF_HEIGHT);
 674                 mutex_unlock(&data->mutex);
 675                 return ret;
 676         case IIO_CHAN_INFO_CALIBWEIGHT:
 677                 if (val < 0 || val > 255)
 678                         return -EINVAL;
 679                 mutex_lock(&data->mutex);
 680                 ret = mma9553_set_config(data,
 681                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 682                                          &data->conf.height_weight,
 683                                          val, MMA9553_MASK_CONF_WEIGHT);
 684                 mutex_unlock(&data->mutex);
 685                 return ret;
 686         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 687                 switch (chan->type) {
 688                 case IIO_STEPS:
 689                         /*
 690                          * Set to 0 to disable step filtering. If the value
 691                          * specified is greater than 6, then 6 will be used.
 692                          */
 693                         if (val < 0)
 694                                 return -EINVAL;
 695                         if (val > 6)
 696                                 val = 6;
 697                         mutex_lock(&data->mutex);
 698                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 699                                                  &data->conf.filter, val,
 700                                                  MMA9553_MASK_CONF_FILTSTEP);
 701                         mutex_unlock(&data->mutex);
 702                         return ret;
 703                 default:
 704                         return -EINVAL;
 705                 }
 706         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 707                 switch (chan->type) {
 708                 case IIO_STEPS:
 709                         if (val < 0 || val > 127)
 710                                 return -EINVAL;
 711                         mutex_lock(&data->mutex);
 712                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 713                                                  &data->conf.filter, val,
 714                                                  MMA9553_MASK_CONF_FILTTIME);
 715                         mutex_unlock(&data->mutex);
 716                         return ret;
 717                 default:
 718                         return -EINVAL;
 719                 }
 720         case IIO_CHAN_INFO_INT_TIME:
 721                 switch (chan->type) {
 722                 case IIO_VELOCITY:
 723                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 724                                 return -EINVAL;
 725                         /*
 726                          * If set to a value greater than 5, then 5 will be
 727                          * used. Warning: Do not set SPDPRD to 0 or 1 as
 728                          * this may cause undesirable behavior.
 729                          */
 730                         if (val < 2)
 731                                 return -EINVAL;
 732                         if (val > 5)
 733                                 val = 5;
 734                         mutex_lock(&data->mutex);
 735                         ret = mma9553_set_config(data,
 736                                                  MMA9553_REG_CONF_SPEED_STEP,
 737                                                  &data->conf.speed_step, val,
 738                                                  MMA9553_MASK_CONF_SPDPRD);
 739                         mutex_unlock(&data->mutex);
 740                         return ret;
 741                 default:
 742                         return -EINVAL;
 743                 }
 744         default:
 745                 return -EINVAL;
 746         }
 747 }
 748
 749 static int mma9553_read_event_config(struct iio_dev *indio_dev,
 750                                      const struct iio_chan_spec *chan,
 751                                      enum iio_event_type type,
 752                                      enum iio_event_direction dir)
 753 {
 754
 755         struct mma9553_data *data = iio_priv(indio_dev);
 756         struct mma9553_event *event;
 757
 758         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 759         if (!event)
 760                 return -EINVAL;
 761
 762         return event->enabled;
 763 }
 764
 765 static int mma9553_write_event_config(struct iio_dev *indio_dev,
 766                                       const struct iio_chan_spec *chan,
 767                                       enum iio_event_type type,
 768                                       enum iio_event_direction dir, int state)
 769 {
 770         struct mma9553_data *data = iio_priv(indio_dev);
 771         struct mma9553_event *event;
 772         int ret;
 773
 774         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 775         if (!event)
 776                 return -EINVAL;
 777
 778         if (event->enabled == state)
 779                 return 0;
 780
 781         mutex_lock(&data->mutex);
 782
 783         ret = mma9551_set_power_state(data->client, state);
 784         if (ret < 0)
 785                 goto err_out;
 786         event->enabled = state;
 787
 788         ret = mma9553_conf_gpio(data);
 789         if (ret < 0)
 790                 goto err_conf_gpio;
 791
 792         mutex_unlock(&data->mutex);
 793
 794         return ret;
 795
 796 err_conf_gpio:
 797         if (state) {
 798                 event->enabled = false;
 799                 mma9551_set_power_state(data->client, false);
 800         }
 801 err_out:
 802         mutex_unlock(&data->mutex);
 803         return ret;
 804 }
 805
 806 static int mma9553_read_event_value(struct iio_dev *indio_dev,
 807                                     const struct iio_chan_spec *chan,
 808                                     enum iio_event_type type,
 809                                     enum iio_event_direction dir,
 810                                     enum iio_event_info info,
 811                                     int *val, int *val2)
 812 {
 813         struct mma9553_data *data = iio_priv(indio_dev);
 814
 815         *val2 = 0;
 816         switch (info) {
 817         case IIO_EV_INFO_VALUE:
 818                 switch (chan->type) {
 819                 case IIO_STEPS:
 820                         *val = mma9553_get_bits(data->conf.speed_step,
 821                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 822                         return IIO_VAL_INT;
 823                 case IIO_ACTIVITY:
 824                         /*
 825                          * The device does not support confidence value levels.
 826                          * We set an average of 50%.
 827                          */
 828                         *val = 50;
 829                         return IIO_VAL_INT;
 830                 default:
 831                         return -EINVAL;
 832                 }
 833         case IIO_EV_INFO_PERIOD:
 834                 switch (chan->type) {
 835                 case IIO_ACTIVITY:
 836                         *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
 837                         return IIO_VAL_INT;
 838                 default:
 839                         return -EINVAL;
 840                 }
 841         default:
 842                 return -EINVAL;
 843         }
 844 }
 845
 846 static int mma9553_write_event_value(struct iio_dev *indio_dev,
 847                                      const struct iio_chan_spec *chan,
 848                                      enum iio_event_type type,
 849                                      enum iio_event_direction dir,
 850                                      enum iio_event_info info,
 851                                      int val, int val2)
 852 {
 853         struct mma9553_data *data = iio_priv(indio_dev);
 854         int ret;
 855
 856         switch (info) {
 857         case IIO_EV_INFO_VALUE:
 858                 switch (chan->type) {
 859                 case IIO_STEPS:
 860                         if (val < 0 || val > 255)
 861                                 return -EINVAL;
 862                         mutex_lock(&data->mutex);
 863                         ret = mma9553_set_config(data,
 864                                                 MMA9553_REG_CONF_SPEED_STEP,
 865                                                 &data->conf.speed_step, val,
 866                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 867                         mutex_unlock(&data->mutex);
 868                         return ret;
 869                 default:
 870                         return -EINVAL;
 871                 }
 872         case IIO_EV_INFO_PERIOD:
 873                 switch (chan->type) {
 874                 case IIO_ACTIVITY:
 875                         mutex_lock(&data->mutex);
 876                         ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
 877                                                  &data->conf.actthd,
 878                                                  MMA9553_ACTIVITY_SEC_TO_THD
 879                                                  (val), MMA9553_MASK_CONF_WORD);
 880                         mutex_unlock(&data->mutex);
 881                         return ret;
 882                 default:
 883                         return -EINVAL;
 884                 }
 885         default:
 886                 return -EINVAL;
 887         }
 888 }
 889
 890 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
 891                                         const struct iio_chan_spec *chan)
 892 {
 893         struct mma9553_data *data = iio_priv(indio_dev);
 894         u8 gender;
 895
 896         gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
 897         /*
 898          * HW expects 0 for female and 1 for male,
 899          * while iio index is 0 for male and 1 for female
 900          */
 901         return !gender;
 902 }
 903
 904 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
 905                                         const struct iio_chan_spec *chan,
 906                                         unsigned int mode)
 907 {
 908         struct mma9553_data *data = iio_priv(indio_dev);
 909         u8 gender = !mode;
 910         int ret;
 911
 912         if ((mode != 0) && (mode != 1))
 913                 return -EINVAL;
 914         mutex_lock(&data->mutex);
 915         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 916                                  &data->conf.filter, gender,
 917                                  MMA9553_MASK_CONF_MALE);
 918         mutex_unlock(&data->mutex);
 919
 920         return ret;
 921 }
 922
 923 static const struct iio_event_spec mma9553_step_event = {
 924         .type = IIO_EV_TYPE_CHANGE,
 925         .dir = IIO_EV_DIR_NONE,
 926         .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
 927 };
 928
 929 static const struct iio_event_spec mma9553_activity_events[] = {
 930         {
 931                 .type = IIO_EV_TYPE_THRESH,
 932                 .dir = IIO_EV_DIR_RISING,
 933                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 934                                  BIT(IIO_EV_INFO_VALUE) |
 935                                  BIT(IIO_EV_INFO_PERIOD),
 936          },
 937         {
 938                 .type = IIO_EV_TYPE_THRESH,
 939                 .dir = IIO_EV_DIR_FALLING,
 940                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 941                                  BIT(IIO_EV_INFO_VALUE) |
 942                                  BIT(IIO_EV_INFO_PERIOD),
 943         },
 944 };
 945
 946 static const char * const calibgender_modes[] = { "male", "female" };
 947
 948 static const struct iio_enum mma9553_calibgender_enum = {
 949         .items = calibgender_modes,
 950         .num_items = ARRAY_SIZE(calibgender_modes),
 951         .get = mma9553_get_calibgender_mode,
 952         .set = mma9553_set_calibgender_mode,
 953 };
 954
 955 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
 956         IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
 957         IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
 958         {},
 959 };
 960
 961 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) {               \
 962         .type = _type,                                          \
 963         .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE)      |  \
 964                               BIT(IIO_CHAN_INFO_CALIBHEIGHT) |  \
 965                               _mask,                            \
 966         .ext_info = mma9553_ext_info,                           \
 967 }
 968
 969 #define MMA9553_ACTIVITY_CHANNEL(_chan2) {                              \
 970         .type = IIO_ACTIVITY,                                           \
 971         .modified = 1,                                                  \
 972         .channel2 = _chan2,                                             \
 973         .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),             \
 974         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),     \
 975         .event_spec = mma9553_activity_events,                          \
 976         .num_event_specs = ARRAY_SIZE(mma9553_activity_events),         \
 977         .ext_info = mma9553_ext_info,                                   \
 978 }
 979
 980 static const struct iio_chan_spec mma9553_channels[] = {
 981         MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
 982         MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
 983         MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
 984
 985         {
 986                 .type = IIO_STEPS,
 987                 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
 988                                      BIT(IIO_CHAN_INFO_ENABLE) |
 989                                      BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
 990                                      BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
 991                 .event_spec = &mma9553_step_event,
 992                 .num_event_specs = 1,
 993         },
 994
 995         MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
 996         {
 997                 .type = IIO_VELOCITY,
 998                 .modified = 1,
 999                 .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
1000                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1001                                       BIT(IIO_CHAN_INFO_SCALE) |
1002                                       BIT(IIO_CHAN_INFO_INT_TIME) |
1003                                       BIT(IIO_CHAN_INFO_ENABLE),
1004                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
1005                 .ext_info = mma9553_ext_info,
1006         },
1007         MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
1008                                   BIT(IIO_CHAN_INFO_SCALE) |
1009                                   BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
1010
1011         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
1012         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
1013         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
1014         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
1015 };
1016
1017 static const struct iio_info mma9553_info = {
1018         .driver_module = THIS_MODULE,
1019         .read_raw = mma9553_read_raw,
1020         .write_raw = mma9553_write_raw,
1021         .read_event_config = mma9553_read_event_config,
1022         .write_event_config = mma9553_write_event_config,
1023         .read_event_value = mma9553_read_event_value,
1024         .write_event_value = mma9553_write_event_value,
1025 };
1026
1027 static irqreturn_t mma9553_irq_handler(int irq, void *private)
1028 {
1029         struct iio_dev *indio_dev = private;
1030         struct mma9553_data *data = iio_priv(indio_dev);
1031
1032         data->timestamp = iio_get_time_ns();
1033         /*
1034          * Since we only configure the interrupt pin when an
1035          * event is enabled, we are sure we have at least
1036          * one event enabled at this point.
1037          */
1038         return IRQ_WAKE_THREAD;
1039 }
1040
1041 static irqreturn_t mma9553_event_handler(int irq, void *private)
1042 {
1043         struct iio_dev *indio_dev = private;
1044         struct mma9553_data *data = iio_priv(indio_dev);
1045         u16 stepcnt;
1046         u8 activity;
1047         struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1048         int ret;
1049
1050         mutex_lock(&data->mutex);
1051         ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1052         if (ret < 0) {
1053                 mutex_unlock(&data->mutex);
1054                 return IRQ_HANDLED;
1055         }
1056
1057         ev_prev_activity =
1058             mma9553_get_event(data, IIO_ACTIVITY,
1059                               mma9553_activity_to_mod(data->activity),
1060                               IIO_EV_DIR_FALLING);
1061         ev_activity =
1062             mma9553_get_event(data, IIO_ACTIVITY,
1063                               mma9553_activity_to_mod(activity),
1064                               IIO_EV_DIR_RISING);
1065         ev_step_detect =
1066             mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
1067
1068         if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1069                 data->stepcnt = stepcnt;
1070                 iio_push_event(indio_dev,
1071                                IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1072                                IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0),
1073                                data->timestamp);
1074         }
1075
1076         if (activity != data->activity) {
1077                 data->activity = activity;
1078                 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1079                 if (ev_prev_activity && ev_prev_activity->enabled)
1080                         iio_push_event(indio_dev,
1081                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1082                                        ev_prev_activity->info->mod,
1083                                        IIO_EV_DIR_FALLING,
1084                                        IIO_EV_TYPE_THRESH, 0, 0, 0),
1085                                        data->timestamp);
1086
1087                 if (ev_activity && ev_activity->enabled)
1088                         iio_push_event(indio_dev,
1089                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1090                                        ev_activity->info->mod,
1091                                        IIO_EV_DIR_RISING,
1092                                        IIO_EV_TYPE_THRESH, 0, 0, 0),
1093                                        data->timestamp);
1094         }
1095         mutex_unlock(&data->mutex);
1096
1097         return IRQ_HANDLED;
1098 }
1099
1100 static int mma9553_gpio_probe(struct i2c_client *client)
1101 {
1102         struct device *dev;
1103         struct gpio_desc *gpio;
1104         int ret;
1105
1106         if (!client)
1107                 return -EINVAL;
1108
1109         dev = &client->dev;
1110
1111         /* data ready gpio interrupt pin */
1112         gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0);
1113         if (IS_ERR(gpio)) {
1114                 dev_err(dev, "acpi gpio get index failed\n");
1115                 return PTR_ERR(gpio);
1116         }
1117
1118         ret = gpiod_direction_input(gpio);
1119         if (ret)
1120                 return ret;
1121
1122         ret = gpiod_to_irq(gpio);
1123
1124         dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1125
1126         return ret;
1127 }
1128
1129 static const char *mma9553_match_acpi_device(struct device *dev)
1130 {
1131         const struct acpi_device_id *id;
1132
1133         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1134         if (!id)
1135                 return NULL;
1136
1137         return dev_name(dev);
1138 }
1139
1140 static int mma9553_probe(struct i2c_client *client,
1141                          const struct i2c_device_id *id)
1142 {
1143         struct mma9553_data *data;
1144         struct iio_dev *indio_dev;
1145         const char *name = NULL;
1146         int ret;
1147
1148         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1149         if (!indio_dev)
1150                 return -ENOMEM;
1151
1152         data = iio_priv(indio_dev);
1153         i2c_set_clientdata(client, indio_dev);
1154         data->client = client;
1155
1156         if (id)
1157                 name = id->name;
1158         else if (ACPI_HANDLE(&client->dev))
1159                 name = mma9553_match_acpi_device(&client->dev);
1160         else
1161                 return -ENOSYS;
1162
1163         mutex_init(&data->mutex);
1164         mma9553_init_events(data);
1165
1166         ret = mma9553_init(data);
1167         if (ret < 0)
1168                 return ret;
1169
1170         indio_dev->dev.parent = &client->dev;
1171         indio_dev->channels = mma9553_channels;
1172         indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1173         indio_dev->name = name;
1174         indio_dev->modes = INDIO_DIRECT_MODE;
1175         indio_dev->info = &mma9553_info;
1176
1177         if (client->irq < 0)
1178                 client->irq = mma9553_gpio_probe(client);
1179
1180         if (client->irq >= 0) {
1181                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1182                                                 mma9553_irq_handler,
1183                                                 mma9553_event_handler,
1184                                                 IRQF_TRIGGER_RISING,
1185                                                 MMA9553_IRQ_NAME, indio_dev);
1186                 if (ret < 0) {
1187                         dev_err(&client->dev, "request irq %d failed\n",
1188                                 client->irq);
1189                         goto out_poweroff;
1190                 }
1191
1192         }
1193
1194         ret = iio_device_register(indio_dev);
1195         if (ret < 0) {
1196                 dev_err(&client->dev, "unable to register iio device\n");
1197                 goto out_poweroff;
1198         }
1199
1200         ret = pm_runtime_set_active(&client->dev);
1201         if (ret < 0)
1202                 goto out_iio_unregister;
1203
1204         pm_runtime_enable(&client->dev);
1205         pm_runtime_set_autosuspend_delay(&client->dev,
1206                                          MMA9551_AUTO_SUSPEND_DELAY_MS);
1207         pm_runtime_use_autosuspend(&client->dev);
1208
1209         dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1210
1211         return 0;
1212
1213 out_iio_unregister:
1214         iio_device_unregister(indio_dev);
1215 out_poweroff:
1216         mma9551_set_device_state(client, false);
1217         return ret;
1218 }
1219
1220 static int mma9553_remove(struct i2c_client *client)
1221 {
1222         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1223         struct mma9553_data *data = iio_priv(indio_dev);
1224
1225         pm_runtime_disable(&client->dev);
1226         pm_runtime_set_suspended(&client->dev);
1227         pm_runtime_put_noidle(&client->dev);
1228
1229         iio_device_unregister(indio_dev);
1230         mutex_lock(&data->mutex);
1231         mma9551_set_device_state(data->client, false);
1232         mutex_unlock(&data->mutex);
1233
1234         return 0;
1235 }
1236
1237 #ifdef CONFIG_PM
1238 static int mma9553_runtime_suspend(struct device *dev)
1239 {
1240         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1241         struct mma9553_data *data = iio_priv(indio_dev);
1242         int ret;
1243
1244         mutex_lock(&data->mutex);
1245         ret = mma9551_set_device_state(data->client, false);
1246         mutex_unlock(&data->mutex);
1247         if (ret < 0) {
1248                 dev_err(&data->client->dev, "powering off device failed\n");
1249                 return -EAGAIN;
1250         }
1251
1252         return 0;
1253 }
1254
1255 static int mma9553_runtime_resume(struct device *dev)
1256 {
1257         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1258         struct mma9553_data *data = iio_priv(indio_dev);
1259         int ret;
1260
1261         ret = mma9551_set_device_state(data->client, true);
1262         if (ret < 0)
1263                 return ret;
1264
1265         mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1266
1267         return 0;
1268 }
1269 #endif
1270
1271 #ifdef CONFIG_PM_SLEEP
1272 static int mma9553_suspend(struct device *dev)
1273 {
1274         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1275         struct mma9553_data *data = iio_priv(indio_dev);
1276         int ret;
1277
1278         mutex_lock(&data->mutex);
1279         ret = mma9551_set_device_state(data->client, false);
1280         mutex_unlock(&data->mutex);
1281
1282         return ret;
1283 }
1284
1285 static int mma9553_resume(struct device *dev)
1286 {
1287         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1288         struct mma9553_data *data = iio_priv(indio_dev);
1289         int ret;
1290
1291         mutex_lock(&data->mutex);
1292         ret = mma9551_set_device_state(data->client, true);
1293         mutex_unlock(&data->mutex);
1294
1295         return ret;
1296 }
1297 #endif
1298
1299 static const struct dev_pm_ops mma9553_pm_ops = {
1300         SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1301         SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1302                            mma9553_runtime_resume, NULL)
1303 };
1304
1305 static const struct acpi_device_id mma9553_acpi_match[] = {
1306         {"MMA9553", 0},
1307         {},
1308 };
1309
1310 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1311
1312 static const struct i2c_device_id mma9553_id[] = {
1313         {"mma9553", 0},
1314         {},
1315 };
1316
1317 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1318
1319 static struct i2c_driver mma9553_driver = {
1320         .driver = {
1321                    .name = MMA9553_DRV_NAME,
1322                    .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1323                    .pm = &mma9553_pm_ops,
1324                    },
1325         .probe = mma9553_probe,
1326         .remove = mma9553_remove,
1327         .id_table = mma9553_id,
1328 };
1329
1330 module_i2c_driver(mma9553_driver);
1331
1332 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1333 MODULE_LICENSE("GPL v2");
1334 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");