kernel/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 #define MMA9553_MAX_ACTTHD                      GENMASK(15, 0)
  58
  59 /* Pedometer status registers (R-only) */
  60 #define MMA9553_REG_STATUS                      0x00
  61 #define MMA9553_MASK_STATUS_MRGFL               BIT(15)
  62 #define MMA9553_MASK_STATUS_SUSPCHG             BIT(14)
  63 #define MMA9553_MASK_STATUS_STEPCHG             BIT(13)
  64 #define MMA9553_MASK_STATUS_ACTCHG              BIT(12)
  65 #define MMA9553_MASK_STATUS_SUSP                BIT(11)
  66 #define MMA9553_MASK_STATUS_ACTIVITY            (BIT(10) | BIT(9) | BIT(8))
  67 #define MMA9553_MASK_STATUS_VERSION             0x00FF
  68
  69 #define MMA9553_REG_STEPCNT                     0x02
  70 #define MMA9553_REG_DISTANCE                    0x04
  71 #define MMA9553_REG_SPEED                       0x06
  72 #define MMA9553_REG_CALORIES                    0x08
  73 #define MMA9553_REG_SLEEPCNT                    0x0A
  74
  75 /* Pedometer events are always mapped to this pin. */
  76 #define MMA9553_DEFAULT_GPIO_PIN        mma9551_gpio6
  77 #define MMA9553_DEFAULT_GPIO_POLARITY   0
  78
  79 /* Bitnum used for gpio configuration = bit number in high status byte */
  80 #define STATUS_TO_BITNUM(bit)           (ffs(bit) - 9)
  81
  82 #define MMA9553_DEFAULT_SAMPLE_RATE     30      /* Hz */
  83
  84 /*
  85  * The internal activity level must be stable for ACTTHD samples before
  86  * ACTIVITY is updated.The ACTIVITY variable contains the current activity
  87  * level and is updated every time a step is detected or once a second
  88  * if there are no steps.
  89  */
  90 #define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
  91 #define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
  92
  93 /*
  94  * Autonomously suspend pedometer if acceleration vector magnitude
  95  * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
  96  */
  97 #define MMA9553_DEFAULT_SLEEPMIN        3688    /* 0,9 g */
  98 #define MMA9553_DEFAULT_SLEEPMAX        4508    /* 1,1 g */
  99 #define MMA9553_DEFAULT_SLEEPTHD        (MMA9553_DEFAULT_SAMPLE_RATE * 30)
 100
 101 #define MMA9553_CONFIG_RETRIES          2
 102
 103 /* Status register - activity field  */
 104 enum activity_level {
 105         ACTIVITY_UNKNOWN,
 106         ACTIVITY_REST,
 107         ACTIVITY_WALKING,
 108         ACTIVITY_JOGGING,
 109         ACTIVITY_RUNNING,
 110 };
 111
 112 static struct mma9553_event_info {
 113         enum iio_chan_type type;
 114         enum iio_modifier mod;
 115         enum iio_event_direction dir;
 116 } mma9553_events_info[] = {
 117         {
 118                 .type = IIO_STEPS,
 119                 .mod = IIO_NO_MOD,
 120                 .dir = IIO_EV_DIR_NONE,
 121         },
 122         {
 123                 .type = IIO_ACTIVITY,
 124                 .mod = IIO_MOD_STILL,
 125                 .dir = IIO_EV_DIR_RISING,
 126         },
 127         {
 128                 .type = IIO_ACTIVITY,
 129                 .mod = IIO_MOD_STILL,
 130                 .dir = IIO_EV_DIR_FALLING,
 131         },
 132         {
 133                 .type = IIO_ACTIVITY,
 134                 .mod = IIO_MOD_WALKING,
 135                 .dir = IIO_EV_DIR_RISING,
 136         },
 137         {
 138                 .type = IIO_ACTIVITY,
 139                 .mod = IIO_MOD_WALKING,
 140                 .dir = IIO_EV_DIR_FALLING,
 141         },
 142         {
 143                 .type = IIO_ACTIVITY,
 144                 .mod = IIO_MOD_JOGGING,
 145                 .dir = IIO_EV_DIR_RISING,
 146         },
 147         {
 148                 .type = IIO_ACTIVITY,
 149                 .mod = IIO_MOD_JOGGING,
 150                 .dir = IIO_EV_DIR_FALLING,
 151         },
 152         {
 153                 .type = IIO_ACTIVITY,
 154                 .mod = IIO_MOD_RUNNING,
 155                 .dir = IIO_EV_DIR_RISING,
 156         },
 157         {
 158                 .type = IIO_ACTIVITY,
 159                 .mod = IIO_MOD_RUNNING,
 160                 .dir = IIO_EV_DIR_FALLING,
 161         },
 162 };
 163
 164 #define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
 165
 166 struct mma9553_event {
 167         struct mma9553_event_info *info;
 168         bool enabled;
 169 };
 170
 171 struct mma9553_conf_regs {
 172         u16 sleepmin;
 173         u16 sleepmax;
 174         u16 sleepthd;
 175         u16 config;
 176         u16 height_weight;
 177         u16 filter;
 178         u16 speed_step;
 179         u16 actthd;
 180 } __packed;
 181
 182 struct mma9553_data {
 183         struct i2c_client *client;
 184         struct mutex mutex;
 185         struct mma9553_conf_regs conf;
 186         struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
 187         int num_events;
 188         u8 gpio_bitnum;
 189         /*
 190          * This is used for all features that depend on step count:
 191          * step count, distance, speed, calories.
 192          */
 193         bool stepcnt_enabled;
 194         u16 stepcnt;
 195         u8 activity;
 196         s64 timestamp;
 197 };
 198
 199 static u8 mma9553_get_bits(u16 val, u16 mask)
 200 {
 201         return (val & mask) >> (ffs(mask) - 1);
 202 }
 203
 204 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
 205 {
 206         return (current_val & ~mask) | (val << (ffs(mask) - 1));
 207 }
 208
 209 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
 210 {
 211         switch (activity) {
 212         case ACTIVITY_RUNNING:
 213                 return IIO_MOD_RUNNING;
 214         case ACTIVITY_JOGGING:
 215                 return IIO_MOD_JOGGING;
 216         case ACTIVITY_WALKING:
 217                 return IIO_MOD_WALKING;
 218         case ACTIVITY_REST:
 219                 return IIO_MOD_STILL;
 220         case ACTIVITY_UNKNOWN:
 221         default:
 222                 return IIO_NO_MOD;
 223         }
 224 }
 225
 226 static void mma9553_init_events(struct mma9553_data *data)
 227 {
 228         int i;
 229
 230         data->num_events = MMA9553_EVENTS_INFO_SIZE;
 231         for (i = 0; i < data->num_events; i++) {
 232                 data->events[i].info = &mma9553_events_info[i];
 233                 data->events[i].enabled = false;
 234         }
 235 }
 236
 237 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
 238                                                enum iio_chan_type type,
 239                                                enum iio_modifier mod,
 240                                                enum iio_event_direction dir)
 241 {
 242         int i;
 243
 244         for (i = 0; i < data->num_events; i++)
 245                 if (data->events[i].info->type == type &&
 246                     data->events[i].info->mod == mod &&
 247                     data->events[i].info->dir == dir)
 248                         return &data->events[i];
 249
 250         return NULL;
 251 }
 252
 253 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
 254                                          bool check_type,
 255                                          enum iio_chan_type type)
 256 {
 257         int i;
 258
 259         for (i = 0; i < data->num_events; i++)
 260                 if ((check_type && data->events[i].info->type == type &&
 261                      data->events[i].enabled) ||
 262                      (!check_type && data->events[i].enabled))
 263                         return true;
 264
 265         return false;
 266 }
 267
 268 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
 269                               u16 *p_reg_val, u16 val, u16 mask)
 270 {
 271         int ret, retries;
 272         u16 reg_val, config;
 273
 274         reg_val = *p_reg_val;
 275         if (val == mma9553_get_bits(reg_val, mask))
 276                 return 0;
 277
 278         reg_val = mma9553_set_bits(reg_val, val, mask);
 279         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 280                                         reg, reg_val);
 281         if (ret < 0) {
 282                 dev_err(&data->client->dev,
 283                         "error writing config register 0x%x\n", reg);
 284                 return ret;
 285         }
 286
 287         *p_reg_val = reg_val;
 288
 289         /* Reinitializes the pedometer with current configuration values */
 290         config = mma9553_set_bits(data->conf.config, 1,
 291                                   MMA9553_MASK_CONF_CONFIG);
 292
 293         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 294                                         MMA9553_REG_CONF_CONF_STEPLEN, config);
 295         if (ret < 0) {
 296                 dev_err(&data->client->dev,
 297                         "error writing config register 0x%x\n",
 298                         MMA9553_REG_CONF_CONF_STEPLEN);
 299                 return ret;
 300         }
 301
 302         retries = MMA9553_CONFIG_RETRIES;
 303         do {
 304                 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
 305                 ret = mma9551_read_config_word(data->client,
 306                                                MMA9551_APPID_PEDOMETER,
 307                                                MMA9553_REG_CONF_CONF_STEPLEN,
 308                                                &config);
 309                 if (ret < 0)
 310                         return ret;
 311         } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
 312                  --retries > 0);
 313
 314         return 0;
 315 }
 316
 317 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
 318                                          u8 *activity, u16 *stepcnt)
 319 {
 320         u16 buf[2];
 321         int ret;
 322
 323         ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
 324                                         MMA9553_REG_STATUS, sizeof(u32), buf);
 325         if (ret < 0) {
 326                 dev_err(&data->client->dev,
 327                         "error reading status and stepcnt\n");
 328                 return ret;
 329         }
 330
 331         *activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
 332         *stepcnt = buf[1];
 333
 334         return 0;
 335 }
 336
 337 static int mma9553_conf_gpio(struct mma9553_data *data)
 338 {
 339         u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
 340         int ret;
 341         struct mma9553_event *ev_step_detect;
 342         bool activity_enabled;
 343
 344         activity_enabled =
 345             mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
 346         ev_step_detect =
 347             mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
 348
 349         /*
 350          * If both step detector and activity are enabled, use the MRGFL bit.
 351          * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
 352          */
 353         if (activity_enabled && ev_step_detect->enabled)
 354                 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
 355         else if (ev_step_detect->enabled)
 356                 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
 357         else if (activity_enabled)
 358                 bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
 359         else                    /* Reset */
 360                 appid = MMA9551_APPID_NONE;
 361
 362         if (data->gpio_bitnum == bitnum)
 363                 return 0;
 364
 365         /* Save initial values for activity and stepcnt */
 366         if (activity_enabled || ev_step_detect->enabled)
 367                 mma9553_read_activity_stepcnt(data, &data->activity,
 368                                               &data->stepcnt);
 369
 370         ret = mma9551_gpio_config(data->client,
 371                                   MMA9553_DEFAULT_GPIO_PIN,
 372                                   appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
 373         if (ret < 0)
 374                 return ret;
 375         data->gpio_bitnum = bitnum;
 376
 377         return 0;
 378 }
 379
 380 static int mma9553_init(struct mma9553_data *data)
 381 {
 382         int ret;
 383
 384         ret = mma9551_read_version(data->client);
 385         if (ret)
 386                 return ret;
 387
 388         /*
 389          * Read all the pedometer configuration registers. This is used as
 390          * a device identification command to differentiate the MMA9553L
 391          * from the MMA9550L.
 392          */
 393         ret =
 394             mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
 395                                       MMA9553_REG_CONF_SLEEPMIN,
 396                                       sizeof(data->conf), (u16 *) &data->conf);
 397         if (ret < 0) {
 398                 dev_err(&data->client->dev,
 399                         "device is not MMA9553L: failed to read cfg regs\n");
 400                 return ret;
 401         }
 402
 403
 404         /* Reset gpio */
 405         data->gpio_bitnum = -1;
 406         ret = mma9553_conf_gpio(data);
 407         if (ret < 0)
 408                 return ret;
 409
 410         ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
 411         if (ret < 0)
 412                 return ret;
 413
 414         /* Init config registers */
 415         data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
 416         data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
 417         data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
 418         data->conf.config =
 419             mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG);
 420         /*
 421          * Clear the activity debounce counter when the activity level changes,
 422          * so that the confidence level applies for any activity level.
 423          */
 424         data->conf.config = mma9553_set_bits(data->conf.config, 1,
 425                                              MMA9553_MASK_CONF_ACT_DBCNTM);
 426         ret =
 427             mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
 428                                        MMA9553_REG_CONF_SLEEPMIN,
 429                                        sizeof(data->conf), (u16 *) &data->conf);
 430         if (ret < 0) {
 431                 dev_err(&data->client->dev,
 432                         "failed to write configuration registers\n");
 433                 return ret;
 434         }
 435
 436         return mma9551_set_device_state(data->client, true);
 437 }
 438
 439 static int mma9553_read_raw(struct iio_dev *indio_dev,
 440                             struct iio_chan_spec const *chan,
 441                             int *val, int *val2, long mask)
 442 {
 443         struct mma9553_data *data = iio_priv(indio_dev);
 444         int ret;
 445         u16 tmp;
 446         u8 activity;
 447         bool powered_on;
 448
 449         switch (mask) {
 450         case IIO_CHAN_INFO_PROCESSED:
 451                 switch (chan->type) {
 452                 case IIO_STEPS:
 453                         /*
 454                          * The HW only counts steps and other dependent
 455                          * parameters (speed, distance, calories, activity)
 456                          * if power is on (from enabling an event or the
 457                          * step counter */
 458                         powered_on =
 459                             mma9553_is_any_event_enabled(data, false, 0) ||
 460                             data->stepcnt_enabled;
 461                         if (!powered_on) {
 462                                 dev_err(&data->client->dev,
 463                                         "No channels enabled\n");
 464                                 return -EINVAL;
 465                         }
 466                         mutex_lock(&data->mutex);
 467                         ret = mma9551_read_status_word(data->client,
 468                                                        MMA9551_APPID_PEDOMETER,
 469                                                        MMA9553_REG_STEPCNT,
 470                                                        &tmp);
 471                         mutex_unlock(&data->mutex);
 472                         if (ret < 0)
 473                                 return ret;
 474                         *val = tmp;
 475                         return IIO_VAL_INT;
 476                 case IIO_DISTANCE:
 477                         powered_on =
 478                             mma9553_is_any_event_enabled(data, false, 0) ||
 479                             data->stepcnt_enabled;
 480                         if (!powered_on) {
 481                                 dev_err(&data->client->dev,
 482                                         "No channels enabled\n");
 483                                 return -EINVAL;
 484                         }
 485                         mutex_lock(&data->mutex);
 486                         ret = mma9551_read_status_word(data->client,
 487                                                        MMA9551_APPID_PEDOMETER,
 488                                                        MMA9553_REG_DISTANCE,
 489                                                        &tmp);
 490                         mutex_unlock(&data->mutex);
 491                         if (ret < 0)
 492                                 return ret;
 493                         *val = tmp;
 494                         return IIO_VAL_INT;
 495                 case IIO_ACTIVITY:
 496                         powered_on =
 497                             mma9553_is_any_event_enabled(data, false, 0) ||
 498                             data->stepcnt_enabled;
 499                         if (!powered_on) {
 500                                 dev_err(&data->client->dev,
 501                                         "No channels enabled\n");
 502                                 return -EINVAL;
 503                         }
 504                         mutex_lock(&data->mutex);
 505                         ret = mma9551_read_status_word(data->client,
 506                                                        MMA9551_APPID_PEDOMETER,
 507                                                        MMA9553_REG_STATUS,
 508                                                        &tmp);
 509                         mutex_unlock(&data->mutex);
 510                         if (ret < 0)
 511                                 return ret;
 512
 513                         activity =
 514                             mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
 515
 516                         /*
 517                          * The device does not support confidence value levels,
 518                          * so we will always have 100% for current activity and
 519                          * 0% for the others.
 520                          */
 521                         if (chan->channel2 == mma9553_activity_to_mod(activity))
 522                                 *val = 100;
 523                         else
 524                                 *val = 0;
 525                         return IIO_VAL_INT;
 526                 default:
 527                         return -EINVAL;
 528                 }
 529         case IIO_CHAN_INFO_RAW:
 530                 switch (chan->type) {
 531                 case IIO_VELOCITY:      /* m/h */
 532                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 533                                 return -EINVAL;
 534                         powered_on =
 535                             mma9553_is_any_event_enabled(data, false, 0) ||
 536                             data->stepcnt_enabled;
 537                         if (!powered_on) {
 538                                 dev_err(&data->client->dev,
 539                                         "No channels enabled\n");
 540                                 return -EINVAL;
 541                         }
 542                         mutex_lock(&data->mutex);
 543                         ret = mma9551_read_status_word(data->client,
 544                                                        MMA9551_APPID_PEDOMETER,
 545                                                        MMA9553_REG_SPEED, &tmp);
 546                         mutex_unlock(&data->mutex);
 547                         if (ret < 0)
 548                                 return ret;
 549                         *val = tmp;
 550                         return IIO_VAL_INT;
 551                 case IIO_ENERGY:        /* Cal or kcal */
 552                         powered_on =
 553                             mma9553_is_any_event_enabled(data, false, 0) ||
 554                             data->stepcnt_enabled;
 555                         if (!powered_on) {
 556                                 dev_err(&data->client->dev,
 557                                         "No channels enabled\n");
 558                                 return -EINVAL;
 559                         }
 560                         mutex_lock(&data->mutex);
 561                         ret = mma9551_read_status_word(data->client,
 562                                                        MMA9551_APPID_PEDOMETER,
 563                                                        MMA9553_REG_CALORIES,
 564                                                        &tmp);
 565                         mutex_unlock(&data->mutex);
 566                         if (ret < 0)
 567                                 return ret;
 568                         *val = tmp;
 569                         return IIO_VAL_INT;
 570                 case IIO_ACCEL:
 571                         mutex_lock(&data->mutex);
 572                         ret = mma9551_read_accel_chan(data->client,
 573                                                       chan, val, val2);
 574                         mutex_unlock(&data->mutex);
 575                         return ret;
 576                 default:
 577                         return -EINVAL;
 578                 }
 579         case IIO_CHAN_INFO_SCALE:
 580                 switch (chan->type) {
 581                 case IIO_VELOCITY:      /* m/h to m/s */
 582                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 583                                 return -EINVAL;
 584                         *val = 0;
 585                         *val2 = 277;    /* 0.000277 */
 586                         return IIO_VAL_INT_PLUS_MICRO;
 587                 case IIO_ENERGY:        /* Cal or kcal to J */
 588                         *val = 4184;
 589                         return IIO_VAL_INT;
 590                 case IIO_ACCEL:
 591                         return mma9551_read_accel_scale(val, val2);
 592                 default:
 593                         return -EINVAL;
 594                 }
 595         case IIO_CHAN_INFO_ENABLE:
 596                 *val = data->stepcnt_enabled;
 597                 return IIO_VAL_INT;
 598         case IIO_CHAN_INFO_CALIBHEIGHT:
 599                 tmp = mma9553_get_bits(data->conf.height_weight,
 600                                         MMA9553_MASK_CONF_HEIGHT);
 601                 *val = tmp / 100;       /* cm to m */
 602                 *val2 = (tmp % 100) * 10000;
 603                 return IIO_VAL_INT_PLUS_MICRO;
 604         case IIO_CHAN_INFO_CALIBWEIGHT:
 605                 *val = mma9553_get_bits(data->conf.height_weight,
 606                                         MMA9553_MASK_CONF_WEIGHT);
 607                 return IIO_VAL_INT;
 608         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 609                 switch (chan->type) {
 610                 case IIO_STEPS:
 611                         *val = mma9553_get_bits(data->conf.filter,
 612                                                 MMA9553_MASK_CONF_FILTSTEP);
 613                         return IIO_VAL_INT;
 614                 default:
 615                         return -EINVAL;
 616                 }
 617         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 618                 switch (chan->type) {
 619                 case IIO_STEPS:
 620                         *val = mma9553_get_bits(data->conf.filter,
 621                                                 MMA9553_MASK_CONF_FILTTIME);
 622                         return IIO_VAL_INT;
 623                 default:
 624                         return -EINVAL;
 625                 }
 626         case IIO_CHAN_INFO_INT_TIME:
 627                 switch (chan->type) {
 628                 case IIO_VELOCITY:
 629                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 630                                 return -EINVAL;
 631                         *val = mma9553_get_bits(data->conf.speed_step,
 632                                                 MMA9553_MASK_CONF_SPDPRD);
 633                         return IIO_VAL_INT;
 634                 default:
 635                         return -EINVAL;
 636                 }
 637         default:
 638                 return -EINVAL;
 639         }
 640 }
 641
 642 static int mma9553_write_raw(struct iio_dev *indio_dev,
 643                              struct iio_chan_spec const *chan,
 644                              int val, int val2, long mask)
 645 {
 646         struct mma9553_data *data = iio_priv(indio_dev);
 647         int ret, tmp;
 648
 649         switch (mask) {
 650         case IIO_CHAN_INFO_ENABLE:
 651                 if (data->stepcnt_enabled == !!val)
 652                         return 0;
 653                 mutex_lock(&data->mutex);
 654                 ret = mma9551_set_power_state(data->client, val);
 655                 if (ret < 0) {
 656                         mutex_unlock(&data->mutex);
 657                         return ret;
 658                 }
 659                 data->stepcnt_enabled = val;
 660                 mutex_unlock(&data->mutex);
 661                 return 0;
 662         case IIO_CHAN_INFO_CALIBHEIGHT:
 663                 /* m to cm */
 664                 tmp = val * 100 + val2 / 10000;
 665                 if (tmp < 0 || tmp > 255)
 666                         return -EINVAL;
 667                 mutex_lock(&data->mutex);
 668                 ret = mma9553_set_config(data,
 669                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 670                                          &data->conf.height_weight,
 671                                          tmp, MMA9553_MASK_CONF_HEIGHT);
 672                 mutex_unlock(&data->mutex);
 673                 return ret;
 674         case IIO_CHAN_INFO_CALIBWEIGHT:
 675                 if (val < 0 || val > 255)
 676                         return -EINVAL;
 677                 mutex_lock(&data->mutex);
 678                 ret = mma9553_set_config(data,
 679                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 680                                          &data->conf.height_weight,
 681                                          val, MMA9553_MASK_CONF_WEIGHT);
 682                 mutex_unlock(&data->mutex);
 683                 return ret;
 684         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 685                 switch (chan->type) {
 686                 case IIO_STEPS:
 687                         /*
 688                          * Set to 0 to disable step filtering. If the value
 689                          * specified is greater than 6, then 6 will be used.
 690                          */
 691                         if (val < 0)
 692                                 return -EINVAL;
 693                         if (val > 6)
 694                                 val = 6;
 695                         mutex_lock(&data->mutex);
 696                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 697                                                  &data->conf.filter, val,
 698                                                  MMA9553_MASK_CONF_FILTSTEP);
 699                         mutex_unlock(&data->mutex);
 700                         return ret;
 701                 default:
 702                         return -EINVAL;
 703                 }
 704         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 705                 switch (chan->type) {
 706                 case IIO_STEPS:
 707                         if (val < 0 || val > 127)
 708                                 return -EINVAL;
 709                         mutex_lock(&data->mutex);
 710                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 711                                                  &data->conf.filter, val,
 712                                                  MMA9553_MASK_CONF_FILTTIME);
 713                         mutex_unlock(&data->mutex);
 714                         return ret;
 715                 default:
 716                         return -EINVAL;
 717                 }
 718         case IIO_CHAN_INFO_INT_TIME:
 719                 switch (chan->type) {
 720                 case IIO_VELOCITY:
 721                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 722                                 return -EINVAL;
 723                         /*
 724                          * If set to a value greater than 5, then 5 will be
 725                          * used. Warning: Do not set SPDPRD to 0 or 1 as
 726                          * this may cause undesirable behavior.
 727                          */
 728                         if (val < 2)
 729                                 return -EINVAL;
 730                         if (val > 5)
 731                                 val = 5;
 732                         mutex_lock(&data->mutex);
 733                         ret = mma9553_set_config(data,
 734                                                  MMA9553_REG_CONF_SPEED_STEP,
 735                                                  &data->conf.speed_step, val,
 736                                                  MMA9553_MASK_CONF_SPDPRD);
 737                         mutex_unlock(&data->mutex);
 738                         return ret;
 739                 default:
 740                         return -EINVAL;
 741                 }
 742         default:
 743                 return -EINVAL;
 744         }
 745 }
 746
 747 static int mma9553_read_event_config(struct iio_dev *indio_dev,
 748                                      const struct iio_chan_spec *chan,
 749                                      enum iio_event_type type,
 750                                      enum iio_event_direction dir)
 751 {
 752
 753         struct mma9553_data *data = iio_priv(indio_dev);
 754         struct mma9553_event *event;
 755
 756         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 757         if (!event)
 758                 return -EINVAL;
 759
 760         return event->enabled;
 761 }
 762
 763 static int mma9553_write_event_config(struct iio_dev *indio_dev,
 764                                       const struct iio_chan_spec *chan,
 765                                       enum iio_event_type type,
 766                                       enum iio_event_direction dir, int state)
 767 {
 768         struct mma9553_data *data = iio_priv(indio_dev);
 769         struct mma9553_event *event;
 770         int ret;
 771
 772         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 773         if (!event)
 774                 return -EINVAL;
 775
 776         if (event->enabled == state)
 777                 return 0;
 778
 779         mutex_lock(&data->mutex);
 780
 781         ret = mma9551_set_power_state(data->client, state);
 782         if (ret < 0)
 783                 goto err_out;
 784         event->enabled = state;
 785
 786         ret = mma9553_conf_gpio(data);
 787         if (ret < 0)
 788                 goto err_conf_gpio;
 789
 790         mutex_unlock(&data->mutex);
 791
 792         return ret;
 793
 794 err_conf_gpio:
 795         if (state) {
 796                 event->enabled = false;
 797                 mma9551_set_power_state(data->client, false);
 798         }
 799 err_out:
 800         mutex_unlock(&data->mutex);
 801         return ret;
 802 }
 803
 804 static int mma9553_read_event_value(struct iio_dev *indio_dev,
 805                                     const struct iio_chan_spec *chan,
 806                                     enum iio_event_type type,
 807                                     enum iio_event_direction dir,
 808                                     enum iio_event_info info,
 809                                     int *val, int *val2)
 810 {
 811         struct mma9553_data *data = iio_priv(indio_dev);
 812
 813         *val2 = 0;
 814         switch (info) {
 815         case IIO_EV_INFO_VALUE:
 816                 switch (chan->type) {
 817                 case IIO_STEPS:
 818                         *val = mma9553_get_bits(data->conf.speed_step,
 819                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 820                         return IIO_VAL_INT;
 821                 case IIO_ACTIVITY:
 822                         /*
 823                          * The device does not support confidence value levels.
 824                          * We set an average of 50%.
 825                          */
 826                         *val = 50;
 827                         return IIO_VAL_INT;
 828                 default:
 829                         return -EINVAL;
 830                 }
 831         case IIO_EV_INFO_PERIOD:
 832                 switch (chan->type) {
 833                 case IIO_ACTIVITY:
 834                         *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
 835                         return IIO_VAL_INT;
 836                 default:
 837                         return -EINVAL;
 838                 }
 839         default:
 840                 return -EINVAL;
 841         }
 842 }
 843
 844 static int mma9553_write_event_value(struct iio_dev *indio_dev,
 845                                      const struct iio_chan_spec *chan,
 846                                      enum iio_event_type type,
 847                                      enum iio_event_direction dir,
 848                                      enum iio_event_info info,
 849                                      int val, int val2)
 850 {
 851         struct mma9553_data *data = iio_priv(indio_dev);
 852         int ret;
 853
 854         switch (info) {
 855         case IIO_EV_INFO_VALUE:
 856                 switch (chan->type) {
 857                 case IIO_STEPS:
 858                         if (val < 0 || val > 255)
 859                                 return -EINVAL;
 860                         mutex_lock(&data->mutex);
 861                         ret = mma9553_set_config(data,
 862                                                 MMA9553_REG_CONF_SPEED_STEP,
 863                                                 &data->conf.speed_step, val,
 864                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 865                         mutex_unlock(&data->mutex);
 866                         return ret;
 867                 default:
 868                         return -EINVAL;
 869                 }
 870         case IIO_EV_INFO_PERIOD:
 871                 switch (chan->type) {
 872                 case IIO_ACTIVITY:
 873                         if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
 874                             MMA9553_MAX_ACTTHD))
 875                                 return -EINVAL;
 876                         mutex_lock(&data->mutex);
 877                         ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
 878                                                  &data->conf.actthd,
 879                                                  MMA9553_ACTIVITY_SEC_TO_THD
 880                                                  (val), MMA9553_MASK_CONF_WORD);
 881                         mutex_unlock(&data->mutex);
 882                         return ret;
 883                 default:
 884                         return -EINVAL;
 885                 }
 886         default:
 887                 return -EINVAL;
 888         }
 889 }
 890
 891 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
 892                                         const struct iio_chan_spec *chan)
 893 {
 894         struct mma9553_data *data = iio_priv(indio_dev);
 895         u8 gender;
 896
 897         gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
 898         /*
 899          * HW expects 0 for female and 1 for male,
 900          * while iio index is 0 for male and 1 for female
 901          */
 902         return !gender;
 903 }
 904
 905 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
 906                                         const struct iio_chan_spec *chan,
 907                                         unsigned int mode)
 908 {
 909         struct mma9553_data *data = iio_priv(indio_dev);
 910         u8 gender = !mode;
 911         int ret;
 912
 913         if ((mode != 0) && (mode != 1))
 914                 return -EINVAL;
 915         mutex_lock(&data->mutex);
 916         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 917                                  &data->conf.filter, gender,
 918                                  MMA9553_MASK_CONF_MALE);
 919         mutex_unlock(&data->mutex);
 920
 921         return ret;
 922 }
 923
 924 static const struct iio_event_spec mma9553_step_event = {
 925         .type = IIO_EV_TYPE_CHANGE,
 926         .dir = IIO_EV_DIR_NONE,
 927         .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
 928 };
 929
 930 static const struct iio_event_spec mma9553_activity_events[] = {
 931         {
 932                 .type = IIO_EV_TYPE_THRESH,
 933                 .dir = IIO_EV_DIR_RISING,
 934                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 935                                  BIT(IIO_EV_INFO_VALUE) |
 936                                  BIT(IIO_EV_INFO_PERIOD),
 937          },
 938         {
 939                 .type = IIO_EV_TYPE_THRESH,
 940                 .dir = IIO_EV_DIR_FALLING,
 941                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 942                                  BIT(IIO_EV_INFO_VALUE) |
 943                                  BIT(IIO_EV_INFO_PERIOD),
 944         },
 945 };
 946
 947 static const char * const calibgender_modes[] = { "male", "female" };
 948
 949 static const struct iio_enum mma9553_calibgender_enum = {
 950         .items = calibgender_modes,
 951         .num_items = ARRAY_SIZE(calibgender_modes),
 952         .get = mma9553_get_calibgender_mode,
 953         .set = mma9553_set_calibgender_mode,
 954 };
 955
 956 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
 957         IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
 958         IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
 959         {},
 960 };
 961
 962 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) {               \
 963         .type = _type,                                          \
 964         .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE)      |  \
 965                               BIT(IIO_CHAN_INFO_CALIBHEIGHT) |  \
 966                               _mask,                            \
 967         .ext_info = mma9553_ext_info,                           \
 968 }
 969
 970 #define MMA9553_ACTIVITY_CHANNEL(_chan2) {                              \
 971         .type = IIO_ACTIVITY,                                           \
 972         .modified = 1,                                                  \
 973         .channel2 = _chan2,                                             \
 974         .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),             \
 975         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) |    \
 976                                     BIT(IIO_CHAN_INFO_ENABLE),          \
 977         .event_spec = mma9553_activity_events,                          \
 978         .num_event_specs = ARRAY_SIZE(mma9553_activity_events),         \
 979         .ext_info = mma9553_ext_info,                                   \
 980 }
 981
 982 static const struct iio_chan_spec mma9553_channels[] = {
 983         MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
 984         MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
 985         MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
 986
 987         {
 988                 .type = IIO_STEPS,
 989                 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
 990                                      BIT(IIO_CHAN_INFO_ENABLE) |
 991                                      BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
 992                                      BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
 993                 .event_spec = &mma9553_step_event,
 994                 .num_event_specs = 1,
 995         },
 996
 997         MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
 998         {
 999                 .type = IIO_VELOCITY,
1000                 .modified = 1,
1001                 .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
1002                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
1003                                       BIT(IIO_CHAN_INFO_SCALE) |
1004                                       BIT(IIO_CHAN_INFO_INT_TIME) |
1005                                       BIT(IIO_CHAN_INFO_ENABLE),
1006                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
1007                 .ext_info = mma9553_ext_info,
1008         },
1009         MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
1010                                   BIT(IIO_CHAN_INFO_SCALE) |
1011                                   BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
1012
1013         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
1014         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
1015         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
1016         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
1017 };
1018
1019 static const struct iio_info mma9553_info = {
1020         .driver_module = THIS_MODULE,
1021         .read_raw = mma9553_read_raw,
1022         .write_raw = mma9553_write_raw,
1023         .read_event_config = mma9553_read_event_config,
1024         .write_event_config = mma9553_write_event_config,
1025         .read_event_value = mma9553_read_event_value,
1026         .write_event_value = mma9553_write_event_value,
1027 };
1028
1029 static irqreturn_t mma9553_irq_handler(int irq, void *private)
1030 {
1031         struct iio_dev *indio_dev = private;
1032         struct mma9553_data *data = iio_priv(indio_dev);
1033
1034         data->timestamp = iio_get_time_ns();
1035         /*
1036          * Since we only configure the interrupt pin when an
1037          * event is enabled, we are sure we have at least
1038          * one event enabled at this point.
1039          */
1040         return IRQ_WAKE_THREAD;
1041 }
1042
1043 static irqreturn_t mma9553_event_handler(int irq, void *private)
1044 {
1045         struct iio_dev *indio_dev = private;
1046         struct mma9553_data *data = iio_priv(indio_dev);
1047         u16 stepcnt;
1048         u8 activity;
1049         struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1050         int ret;
1051
1052         mutex_lock(&data->mutex);
1053         ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1054         if (ret < 0) {
1055                 mutex_unlock(&data->mutex);
1056                 return IRQ_HANDLED;
1057         }
1058
1059         ev_prev_activity =
1060             mma9553_get_event(data, IIO_ACTIVITY,
1061                               mma9553_activity_to_mod(data->activity),
1062                               IIO_EV_DIR_FALLING);
1063         ev_activity =
1064             mma9553_get_event(data, IIO_ACTIVITY,
1065                               mma9553_activity_to_mod(activity),
1066                               IIO_EV_DIR_RISING);
1067         ev_step_detect =
1068             mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
1069
1070         if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1071                 data->stepcnt = stepcnt;
1072                 iio_push_event(indio_dev,
1073                                IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1074                                IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0),
1075                                data->timestamp);
1076         }
1077
1078         if (activity != data->activity) {
1079                 data->activity = activity;
1080                 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1081                 if (ev_prev_activity && ev_prev_activity->enabled)
1082                         iio_push_event(indio_dev,
1083                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1084                                        ev_prev_activity->info->mod,
1085                                        IIO_EV_DIR_FALLING,
1086                                        IIO_EV_TYPE_THRESH, 0, 0, 0),
1087                                        data->timestamp);
1088
1089                 if (ev_activity && ev_activity->enabled)
1090                         iio_push_event(indio_dev,
1091                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1092                                        ev_activity->info->mod,
1093                                        IIO_EV_DIR_RISING,
1094                                        IIO_EV_TYPE_THRESH, 0, 0, 0),
1095                                        data->timestamp);
1096         }
1097         mutex_unlock(&data->mutex);
1098
1099         return IRQ_HANDLED;
1100 }
1101
1102 static int mma9553_gpio_probe(struct i2c_client *client)
1103 {
1104         struct device *dev;
1105         struct gpio_desc *gpio;
1106         int ret;
1107
1108         if (!client)
1109                 return -EINVAL;
1110
1111         dev = &client->dev;
1112
1113         /* data ready gpio interrupt pin */
1114         gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
1115         if (IS_ERR(gpio)) {
1116                 dev_err(dev, "acpi gpio get index failed\n");
1117                 return PTR_ERR(gpio);
1118         }
1119
1120         ret = gpiod_to_irq(gpio);
1121
1122         dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1123
1124         return ret;
1125 }
1126
1127 static const char *mma9553_match_acpi_device(struct device *dev)
1128 {
1129         const struct acpi_device_id *id;
1130
1131         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1132         if (!id)
1133                 return NULL;
1134
1135         return dev_name(dev);
1136 }
1137
1138 static int mma9553_probe(struct i2c_client *client,
1139                          const struct i2c_device_id *id)
1140 {
1141         struct mma9553_data *data;
1142         struct iio_dev *indio_dev;
1143         const char *name = NULL;
1144         int ret;
1145
1146         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1147         if (!indio_dev)
1148                 return -ENOMEM;
1149
1150         data = iio_priv(indio_dev);
1151         i2c_set_clientdata(client, indio_dev);
1152         data->client = client;
1153
1154         if (id)
1155                 name = id->name;
1156         else if (ACPI_HANDLE(&client->dev))
1157                 name = mma9553_match_acpi_device(&client->dev);
1158         else
1159                 return -ENOSYS;
1160
1161         mutex_init(&data->mutex);
1162         mma9553_init_events(data);
1163
1164         ret = mma9553_init(data);
1165         if (ret < 0)
1166                 return ret;
1167
1168         indio_dev->dev.parent = &client->dev;
1169         indio_dev->channels = mma9553_channels;
1170         indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1171         indio_dev->name = name;
1172         indio_dev->modes = INDIO_DIRECT_MODE;
1173         indio_dev->info = &mma9553_info;
1174
1175         if (client->irq < 0)
1176                 client->irq = mma9553_gpio_probe(client);
1177
1178         if (client->irq >= 0) {
1179                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1180                                                 mma9553_irq_handler,
1181                                                 mma9553_event_handler,
1182                                                 IRQF_TRIGGER_RISING,
1183                                                 MMA9553_IRQ_NAME, indio_dev);
1184                 if (ret < 0) {
1185                         dev_err(&client->dev, "request irq %d failed\n",
1186                                 client->irq);
1187                         goto out_poweroff;
1188                 }
1189
1190         }
1191
1192         ret = iio_device_register(indio_dev);
1193         if (ret < 0) {
1194                 dev_err(&client->dev, "unable to register iio device\n");
1195                 goto out_poweroff;
1196         }
1197
1198         ret = pm_runtime_set_active(&client->dev);
1199         if (ret < 0)
1200                 goto out_iio_unregister;
1201
1202         pm_runtime_enable(&client->dev);
1203         pm_runtime_set_autosuspend_delay(&client->dev,
1204                                          MMA9551_AUTO_SUSPEND_DELAY_MS);
1205         pm_runtime_use_autosuspend(&client->dev);
1206
1207         dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1208
1209         return 0;
1210
1211 out_iio_unregister:
1212         iio_device_unregister(indio_dev);
1213 out_poweroff:
1214         mma9551_set_device_state(client, false);
1215         return ret;
1216 }
1217
1218 static int mma9553_remove(struct i2c_client *client)
1219 {
1220         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1221         struct mma9553_data *data = iio_priv(indio_dev);
1222
1223         pm_runtime_disable(&client->dev);
1224         pm_runtime_set_suspended(&client->dev);
1225         pm_runtime_put_noidle(&client->dev);
1226
1227         iio_device_unregister(indio_dev);
1228         mutex_lock(&data->mutex);
1229         mma9551_set_device_state(data->client, false);
1230         mutex_unlock(&data->mutex);
1231
1232         return 0;
1233 }
1234
1235 #ifdef CONFIG_PM
1236 static int mma9553_runtime_suspend(struct device *dev)
1237 {
1238         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1239         struct mma9553_data *data = iio_priv(indio_dev);
1240         int ret;
1241
1242         mutex_lock(&data->mutex);
1243         ret = mma9551_set_device_state(data->client, false);
1244         mutex_unlock(&data->mutex);
1245         if (ret < 0) {
1246                 dev_err(&data->client->dev, "powering off device failed\n");
1247                 return -EAGAIN;
1248         }
1249
1250         return 0;
1251 }
1252
1253 static int mma9553_runtime_resume(struct device *dev)
1254 {
1255         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1256         struct mma9553_data *data = iio_priv(indio_dev);
1257         int ret;
1258
1259         ret = mma9551_set_device_state(data->client, true);
1260         if (ret < 0)
1261                 return ret;
1262
1263         mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1264
1265         return 0;
1266 }
1267 #endif
1268
1269 #ifdef CONFIG_PM_SLEEP
1270 static int mma9553_suspend(struct device *dev)
1271 {
1272         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1273         struct mma9553_data *data = iio_priv(indio_dev);
1274         int ret;
1275
1276         mutex_lock(&data->mutex);
1277         ret = mma9551_set_device_state(data->client, false);
1278         mutex_unlock(&data->mutex);
1279
1280         return ret;
1281 }
1282
1283 static int mma9553_resume(struct device *dev)
1284 {
1285         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1286         struct mma9553_data *data = iio_priv(indio_dev);
1287         int ret;
1288
1289         mutex_lock(&data->mutex);
1290         ret = mma9551_set_device_state(data->client, true);
1291         mutex_unlock(&data->mutex);
1292
1293         return ret;
1294 }
1295 #endif
1296
1297 static const struct dev_pm_ops mma9553_pm_ops = {
1298         SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1299         SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1300                            mma9553_runtime_resume, NULL)
1301 };
1302
1303 static const struct acpi_device_id mma9553_acpi_match[] = {
1304         {"MMA9553", 0},
1305         {},
1306 };
1307
1308 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1309
1310 static const struct i2c_device_id mma9553_id[] = {
1311         {"mma9553", 0},
1312         {},
1313 };
1314
1315 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1316
1317 static struct i2c_driver mma9553_driver = {
1318         .driver = {
1319                    .name = MMA9553_DRV_NAME,
1320                    .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1321                    .pm = &mma9553_pm_ops,
1322                    },
1323         .probe = mma9553_probe,
1324         .remove = mma9553_remove,
1325         .id_table = mma9553_id,
1326 };
1327
1328 module_i2c_driver(mma9553_driver);
1329
1330 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1331 MODULE_LICENSE("GPL v2");
1332 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");