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