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/iio/iio.h>
  21 #include <linux/iio/sysfs.h>
  22 #include <linux/iio/events.h>
  23 #include <linux/pm_runtime.h>
  24 #include "mma9551_core.h"
  25
  26 #define MMA9553_DRV_NAME                        "mma9553"
  27 #define MMA9553_IRQ_NAME                        "mma9553_event"
  28
  29 /* Pedometer configuration registers (R/W) */
  30 #define MMA9553_REG_CONF_SLEEPMIN               0x00
  31 #define MMA9553_REG_CONF_SLEEPMAX               0x02
  32 #define MMA9553_REG_CONF_SLEEPTHD               0x04
  33 #define MMA9553_MASK_CONF_WORD                  GENMASK(15, 0)
  34
  35 #define MMA9553_REG_CONF_CONF_STEPLEN           0x06
  36 #define MMA9553_MASK_CONF_CONFIG                BIT(15)
  37 #define MMA9553_MASK_CONF_ACT_DBCNTM            BIT(14)
  38 #define MMA9553_MASK_CONF_SLP_DBCNTM            BIT(13)
  39 #define MMA9553_MASK_CONF_STEPLEN               GENMASK(7, 0)
  40
  41 #define MMA9553_REG_CONF_HEIGHT_WEIGHT          0x08
  42 #define MMA9553_MASK_CONF_HEIGHT                GENMASK(15, 8)
  43 #define MMA9553_MASK_CONF_WEIGHT                GENMASK(7, 0)
  44
  45 #define MMA9553_REG_CONF_FILTER                 0x0A
  46 #define MMA9553_MASK_CONF_FILTSTEP              GENMASK(15, 8)
  47 #define MMA9553_MASK_CONF_MALE                  BIT(7)
  48 #define MMA9553_MASK_CONF_FILTTIME              GENMASK(6, 0)
  49
  50 #define MMA9553_REG_CONF_SPEED_STEP             0x0C
  51 #define MMA9553_MASK_CONF_SPDPRD                GENMASK(15, 8)
  52 #define MMA9553_MASK_CONF_STEPCOALESCE          GENMASK(7, 0)
  53
  54 #define MMA9553_REG_CONF_ACTTHD                 0x0E
  55 #define MMA9553_MAX_ACTTHD                      GENMASK(15, 0)
  56
  57 /* Pedometer status registers (R-only) */
  58 #define MMA9553_REG_STATUS                      0x00
  59 #define MMA9553_MASK_STATUS_MRGFL               BIT(15)
  60 #define MMA9553_MASK_STATUS_SUSPCHG             BIT(14)
  61 #define MMA9553_MASK_STATUS_STEPCHG             BIT(13)
  62 #define MMA9553_MASK_STATUS_ACTCHG              BIT(12)
  63 #define MMA9553_MASK_STATUS_SUSP                BIT(11)
  64 #define MMA9553_MASK_STATUS_ACTIVITY            GENMASK(10, 8)
  65 #define MMA9553_MASK_STATUS_VERSION             GENMASK(7, 0)
  66
  67 #define MMA9553_REG_STEPCNT                     0x02
  68 #define MMA9553_REG_DISTANCE                    0x04
  69 #define MMA9553_REG_SPEED                       0x06
  70 #define MMA9553_REG_CALORIES                    0x08
  71 #define MMA9553_REG_SLEEPCNT                    0x0A
  72
  73 /* Pedometer events are always mapped to this pin. */
  74 #define MMA9553_DEFAULT_GPIO_PIN        mma9551_gpio6
  75 #define MMA9553_DEFAULT_GPIO_POLARITY   0
  76
  77 /* Bitnum used for GPIO configuration = bit number in high status byte */
  78 #define MMA9553_STATUS_TO_BITNUM(bit)   (ffs(bit) - 9)
  79 #define MMA9553_MAX_BITNUM              MMA9553_STATUS_TO_BITNUM(BIT(16))
  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         /*
 184          * 1. Serialize access to HW (requested by mma9551_core API).
 185          * 2. Serialize sequences that power on/off the device and access HW.
 186          */
 187         struct mutex mutex;
 188         struct mma9553_conf_regs conf;
 189         struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
 190         int num_events;
 191         u8 gpio_bitnum;
 192         /*
 193          * This is used for all features that depend on step count:
 194          * step count, distance, speed, calories.
 195          */
 196         bool stepcnt_enabled;
 197         u16 stepcnt;
 198         u8 activity;
 199         s64 timestamp;
 200 };
 201
 202 static u8 mma9553_get_bits(u16 val, u16 mask)
 203 {
 204         return (val & mask) >> (ffs(mask) - 1);
 205 }
 206
 207 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
 208 {
 209         return (current_val & ~mask) | (val << (ffs(mask) - 1));
 210 }
 211
 212 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
 213 {
 214         switch (activity) {
 215         case ACTIVITY_RUNNING:
 216                 return IIO_MOD_RUNNING;
 217         case ACTIVITY_JOGGING:
 218                 return IIO_MOD_JOGGING;
 219         case ACTIVITY_WALKING:
 220                 return IIO_MOD_WALKING;
 221         case ACTIVITY_REST:
 222                 return IIO_MOD_STILL;
 223         case ACTIVITY_UNKNOWN:
 224         default:
 225                 return IIO_NO_MOD;
 226         }
 227 }
 228
 229 static void mma9553_init_events(struct mma9553_data *data)
 230 {
 231         int i;
 232
 233         data->num_events = MMA9553_EVENTS_INFO_SIZE;
 234         for (i = 0; i < data->num_events; i++) {
 235                 data->events[i].info = &mma9553_events_info[i];
 236                 data->events[i].enabled = false;
 237         }
 238 }
 239
 240 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
 241                                                enum iio_chan_type type,
 242                                                enum iio_modifier mod,
 243                                                enum iio_event_direction dir)
 244 {
 245         int i;
 246
 247         for (i = 0; i < data->num_events; i++)
 248                 if (data->events[i].info->type == type &&
 249                     data->events[i].info->mod == mod &&
 250                     data->events[i].info->dir == dir)
 251                         return &data->events[i];
 252
 253         return NULL;
 254 }
 255
 256 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
 257                                          bool check_type,
 258                                          enum iio_chan_type type)
 259 {
 260         int i;
 261
 262         for (i = 0; i < data->num_events; i++)
 263                 if ((check_type && data->events[i].info->type == type &&
 264                      data->events[i].enabled) ||
 265                      (!check_type && data->events[i].enabled))
 266                         return true;
 267
 268         return false;
 269 }
 270
 271 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
 272                               u16 *p_reg_val, u16 val, u16 mask)
 273 {
 274         int ret, retries;
 275         u16 reg_val, config;
 276
 277         reg_val = *p_reg_val;
 278         if (val == mma9553_get_bits(reg_val, mask))
 279                 return 0;
 280
 281         reg_val = mma9553_set_bits(reg_val, val, mask);
 282         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 283                                         reg, reg_val);
 284         if (ret < 0) {
 285                 dev_err(&data->client->dev,
 286                         "error writing config register 0x%x\n", reg);
 287                 return ret;
 288         }
 289
 290         *p_reg_val = reg_val;
 291
 292         /* Reinitializes the pedometer with current configuration values */
 293         config = mma9553_set_bits(data->conf.config, 1,
 294                                   MMA9553_MASK_CONF_CONFIG);
 295
 296         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 297                                         MMA9553_REG_CONF_CONF_STEPLEN, config);
 298         if (ret < 0) {
 299                 dev_err(&data->client->dev,
 300                         "error writing config register 0x%x\n",
 301                         MMA9553_REG_CONF_CONF_STEPLEN);
 302                 return ret;
 303         }
 304
 305         retries = MMA9553_CONFIG_RETRIES;
 306         do {
 307                 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
 308                 ret = mma9551_read_config_word(data->client,
 309                                                MMA9551_APPID_PEDOMETER,
 310                                                MMA9553_REG_CONF_CONF_STEPLEN,
 311                                                &config);
 312                 if (ret < 0)
 313                         return ret;
 314         } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
 315                  --retries > 0);
 316
 317         return 0;
 318 }
 319
 320 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
 321                                          u8 *activity, u16 *stepcnt)
 322 {
 323         u16 buf[2];
 324         int ret;
 325
 326         ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
 327                                         MMA9553_REG_STATUS, ARRAY_SIZE(buf),
 328                                         buf);
 329         if (ret < 0) {
 330                 dev_err(&data->client->dev,
 331                         "error reading status and stepcnt\n");
 332                 return ret;
 333         }
 334
 335         *activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
 336         *stepcnt = buf[1];
 337
 338         return 0;
 339 }
 340
 341 static int mma9553_conf_gpio(struct mma9553_data *data)
 342 {
 343         u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
 344         int ret;
 345         struct mma9553_event *ev_step_detect;
 346         bool activity_enabled;
 347
 348         activity_enabled = mma9553_is_any_event_enabled(data, true,
 349                                                         IIO_ACTIVITY);
 350         ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
 351                                            IIO_EV_DIR_NONE);
 352
 353         /*
 354          * If both step detector and activity are enabled, use the MRGFL bit.
 355          * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
 356          */
 357         if (activity_enabled && ev_step_detect->enabled)
 358                 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
 359         else if (ev_step_detect->enabled)
 360                 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
 361         else if (activity_enabled)
 362                 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
 363         else                    /* Reset */
 364                 appid = MMA9551_APPID_NONE;
 365
 366         if (data->gpio_bitnum == bitnum)
 367                 return 0;
 368
 369         /* Save initial values for activity and stepcnt */
 370         if (activity_enabled || ev_step_detect->enabled) {
 371                 ret = mma9553_read_activity_stepcnt(data, &data->activity,
 372                                                     &data->stepcnt);
 373                 if (ret < 0)
 374                         return ret;
 375         }
 376
 377         ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid,
 378                                   bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
 379         if (ret < 0)
 380                 return ret;
 381         data->gpio_bitnum = bitnum;
 382
 383         return 0;
 384 }
 385
 386 static int mma9553_init(struct mma9553_data *data)
 387 {
 388         int ret;
 389
 390         ret = mma9551_read_version(data->client);
 391         if (ret)
 392                 return ret;
 393
 394         /*
 395          * Read all the pedometer configuration registers. This is used as
 396          * a device identification command to differentiate the MMA9553L
 397          * from the MMA9550L.
 398          */
 399         ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
 400                                         MMA9553_REG_CONF_SLEEPMIN,
 401                                         sizeof(data->conf) / sizeof(u16),
 402                                         (u16 *)&data->conf);
 403         if (ret < 0) {
 404                 dev_err(&data->client->dev,
 405                         "failed to read configuration registers\n");
 406                 return ret;
 407         }
 408
 409         /* Reset GPIO */
 410         data->gpio_bitnum = MMA9553_MAX_BITNUM;
 411         ret = mma9553_conf_gpio(data);
 412         if (ret < 0)
 413                 return ret;
 414
 415         ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
 416         if (ret < 0)
 417                 return ret;
 418
 419         /* Init config registers */
 420         data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
 421         data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
 422         data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
 423         data->conf.config = mma9553_set_bits(data->conf.config, 1,
 424                                              MMA9553_MASK_CONF_CONFIG);
 425         /*
 426          * Clear the activity debounce counter when the activity level changes,
 427          * so that the confidence level applies for any activity level.
 428          */
 429         data->conf.config = mma9553_set_bits(data->conf.config, 1,
 430                                              MMA9553_MASK_CONF_ACT_DBCNTM);
 431         ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
 432                                          MMA9553_REG_CONF_SLEEPMIN,
 433                                          sizeof(data->conf) / sizeof(u16),
 434                                          (u16 *)&data->conf);
 435         if (ret < 0) {
 436                 dev_err(&data->client->dev,
 437                         "failed to write configuration registers\n");
 438                 return ret;
 439         }
 440
 441         return mma9551_set_device_state(data->client, true);
 442 }
 443
 444 static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
 445                                     u16 *tmp)
 446 {
 447         bool powered_on;
 448         int ret;
 449
 450         /*
 451          * The HW only counts steps and other dependent
 452          * parameters (speed, distance, calories, activity)
 453          * if power is on (from enabling an event or the
 454          * step counter).
 455          */
 456         powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
 457                      data->stepcnt_enabled;
 458         if (!powered_on) {
 459                 dev_err(&data->client->dev, "No channels enabled\n");
 460                 return -EINVAL;
 461         }
 462
 463         mutex_lock(&data->mutex);
 464         ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
 465                                        reg, tmp);
 466         mutex_unlock(&data->mutex);
 467         return ret;
 468 }
 469
 470 static int mma9553_read_raw(struct iio_dev *indio_dev,
 471                             struct iio_chan_spec const *chan,
 472                             int *val, int *val2, long mask)
 473 {
 474         struct mma9553_data *data = iio_priv(indio_dev);
 475         int ret;
 476         u16 tmp;
 477         u8 activity;
 478
 479         switch (mask) {
 480         case IIO_CHAN_INFO_PROCESSED:
 481                 switch (chan->type) {
 482                 case IIO_STEPS:
 483                         ret = mma9553_read_status_word(data,
 484                                                        MMA9553_REG_STEPCNT,
 485                                                        &tmp);
 486                         if (ret < 0)
 487                                 return ret;
 488                         *val = tmp;
 489                         return IIO_VAL_INT;
 490                 case IIO_DISTANCE:
 491                         ret = mma9553_read_status_word(data,
 492                                                        MMA9553_REG_DISTANCE,
 493                                                        &tmp);
 494                         if (ret < 0)
 495                                 return ret;
 496                         *val = tmp;
 497                         return IIO_VAL_INT;
 498                 case IIO_ACTIVITY:
 499                         ret = mma9553_read_status_word(data,
 500                                                        MMA9553_REG_STATUS,
 501                                                        &tmp);
 502                         if (ret < 0)
 503                                 return ret;
 504
 505                         activity =
 506                             mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
 507
 508                         /*
 509                          * The device does not support confidence value levels,
 510                          * so we will always have 100% for current activity and
 511                          * 0% for the others.
 512                          */
 513                         if (chan->channel2 == mma9553_activity_to_mod(activity))
 514                                 *val = 100;
 515                         else
 516                                 *val = 0;
 517                         return IIO_VAL_INT;
 518                 default:
 519                         return -EINVAL;
 520                 }
 521         case IIO_CHAN_INFO_RAW:
 522                 switch (chan->type) {
 523                 case IIO_VELOCITY:      /* m/h */
 524                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 525                                 return -EINVAL;
 526                         ret = mma9553_read_status_word(data,
 527                                                        MMA9553_REG_SPEED,
 528                                                        &tmp);
 529                         if (ret < 0)
 530                                 return ret;
 531                         *val = tmp;
 532                         return IIO_VAL_INT;
 533                 case IIO_ENERGY:        /* Cal or kcal */
 534                         ret = mma9553_read_status_word(data,
 535                                                        MMA9553_REG_CALORIES,
 536                                                        &tmp);
 537                         if (ret < 0)
 538                                 return ret;
 539                         *val = tmp;
 540                         return IIO_VAL_INT;
 541                 case IIO_ACCEL:
 542                         mutex_lock(&data->mutex);
 543                         ret = mma9551_read_accel_chan(data->client,
 544                                                       chan, val, val2);
 545                         mutex_unlock(&data->mutex);
 546                         return ret;
 547                 default:
 548                         return -EINVAL;
 549                 }
 550         case IIO_CHAN_INFO_SCALE:
 551                 switch (chan->type) {
 552                 case IIO_VELOCITY:      /* m/h to m/s */
 553                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 554                                 return -EINVAL;
 555                         *val = 0;
 556                         *val2 = 277;    /* 0.000277 */
 557                         return IIO_VAL_INT_PLUS_MICRO;
 558                 case IIO_ENERGY:        /* Cal or kcal to J */
 559                         *val = 4184;
 560                         return IIO_VAL_INT;
 561                 case IIO_ACCEL:
 562                         return mma9551_read_accel_scale(val, val2);
 563                 default:
 564                         return -EINVAL;
 565                 }
 566         case IIO_CHAN_INFO_ENABLE:
 567                 *val = data->stepcnt_enabled;
 568                 return IIO_VAL_INT;
 569         case IIO_CHAN_INFO_CALIBHEIGHT:
 570                 tmp = mma9553_get_bits(data->conf.height_weight,
 571                                        MMA9553_MASK_CONF_HEIGHT);
 572                 *val = tmp / 100;       /* cm to m */
 573                 *val2 = (tmp % 100) * 10000;
 574                 return IIO_VAL_INT_PLUS_MICRO;
 575         case IIO_CHAN_INFO_CALIBWEIGHT:
 576                 *val = mma9553_get_bits(data->conf.height_weight,
 577                                         MMA9553_MASK_CONF_WEIGHT);
 578                 return IIO_VAL_INT;
 579         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 580                 switch (chan->type) {
 581                 case IIO_STEPS:
 582                         *val = mma9553_get_bits(data->conf.filter,
 583                                                 MMA9553_MASK_CONF_FILTSTEP);
 584                         return IIO_VAL_INT;
 585                 default:
 586                         return -EINVAL;
 587                 }
 588         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 589                 switch (chan->type) {
 590                 case IIO_STEPS:
 591                         *val = mma9553_get_bits(data->conf.filter,
 592                                                 MMA9553_MASK_CONF_FILTTIME);
 593                         return IIO_VAL_INT;
 594                 default:
 595                         return -EINVAL;
 596                 }
 597         case IIO_CHAN_INFO_INT_TIME:
 598                 switch (chan->type) {
 599                 case IIO_VELOCITY:
 600                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 601                                 return -EINVAL;
 602                         *val = mma9553_get_bits(data->conf.speed_step,
 603                                                 MMA9553_MASK_CONF_SPDPRD);
 604                         return IIO_VAL_INT;
 605                 default:
 606                         return -EINVAL;
 607                 }
 608         default:
 609                 return -EINVAL;
 610         }
 611 }
 612
 613 static int mma9553_write_raw(struct iio_dev *indio_dev,
 614                              struct iio_chan_spec const *chan,
 615                              int val, int val2, long mask)
 616 {
 617         struct mma9553_data *data = iio_priv(indio_dev);
 618         int ret, tmp;
 619
 620         switch (mask) {
 621         case IIO_CHAN_INFO_ENABLE:
 622                 if (data->stepcnt_enabled == !!val)
 623                         return 0;
 624                 mutex_lock(&data->mutex);
 625                 ret = mma9551_set_power_state(data->client, val);
 626                 if (ret < 0) {
 627                         mutex_unlock(&data->mutex);
 628                         return ret;
 629                 }
 630                 data->stepcnt_enabled = val;
 631                 mutex_unlock(&data->mutex);
 632                 return 0;
 633         case IIO_CHAN_INFO_CALIBHEIGHT:
 634                 /* m to cm */
 635                 tmp = val * 100 + val2 / 10000;
 636                 if (tmp < 0 || tmp > 255)
 637                         return -EINVAL;
 638                 mutex_lock(&data->mutex);
 639                 ret = mma9553_set_config(data,
 640                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 641                                          &data->conf.height_weight,
 642                                          tmp, MMA9553_MASK_CONF_HEIGHT);
 643                 mutex_unlock(&data->mutex);
 644                 return ret;
 645         case IIO_CHAN_INFO_CALIBWEIGHT:
 646                 if (val < 0 || val > 255)
 647                         return -EINVAL;
 648                 mutex_lock(&data->mutex);
 649                 ret = mma9553_set_config(data,
 650                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 651                                          &data->conf.height_weight,
 652                                          val, MMA9553_MASK_CONF_WEIGHT);
 653                 mutex_unlock(&data->mutex);
 654                 return ret;
 655         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 656                 switch (chan->type) {
 657                 case IIO_STEPS:
 658                         /*
 659                          * Set to 0 to disable step filtering. If the value
 660                          * specified is greater than 6, then 6 will be used.
 661                          */
 662                         if (val < 0)
 663                                 return -EINVAL;
 664                         if (val > 6)
 665                                 val = 6;
 666                         mutex_lock(&data->mutex);
 667                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 668                                                  &data->conf.filter, val,
 669                                                  MMA9553_MASK_CONF_FILTSTEP);
 670                         mutex_unlock(&data->mutex);
 671                         return ret;
 672                 default:
 673                         return -EINVAL;
 674                 }
 675         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 676                 switch (chan->type) {
 677                 case IIO_STEPS:
 678                         if (val < 0 || val > 127)
 679                                 return -EINVAL;
 680                         mutex_lock(&data->mutex);
 681                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 682                                                  &data->conf.filter, val,
 683                                                  MMA9553_MASK_CONF_FILTTIME);
 684                         mutex_unlock(&data->mutex);
 685                         return ret;
 686                 default:
 687                         return -EINVAL;
 688                 }
 689         case IIO_CHAN_INFO_INT_TIME:
 690                 switch (chan->type) {
 691                 case IIO_VELOCITY:
 692                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 693                                 return -EINVAL;
 694                         /*
 695                          * If set to a value greater than 5, then 5 will be
 696                          * used. Warning: Do not set SPDPRD to 0 or 1 as
 697                          * this may cause undesirable behavior.
 698                          */
 699                         if (val < 2)
 700                                 return -EINVAL;
 701                         if (val > 5)
 702                                 val = 5;
 703                         mutex_lock(&data->mutex);
 704                         ret = mma9553_set_config(data,
 705                                                  MMA9553_REG_CONF_SPEED_STEP,
 706                                                  &data->conf.speed_step, val,
 707                                                  MMA9553_MASK_CONF_SPDPRD);
 708                         mutex_unlock(&data->mutex);
 709                         return ret;
 710                 default:
 711                         return -EINVAL;
 712                 }
 713         default:
 714                 return -EINVAL;
 715         }
 716 }
 717
 718 static int mma9553_read_event_config(struct iio_dev *indio_dev,
 719                                      const struct iio_chan_spec *chan,
 720                                      enum iio_event_type type,
 721                                      enum iio_event_direction dir)
 722 {
 723         struct mma9553_data *data = iio_priv(indio_dev);
 724         struct mma9553_event *event;
 725
 726         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 727         if (!event)
 728                 return -EINVAL;
 729
 730         return event->enabled;
 731 }
 732
 733 static int mma9553_write_event_config(struct iio_dev *indio_dev,
 734                                       const struct iio_chan_spec *chan,
 735                                       enum iio_event_type type,
 736                                       enum iio_event_direction dir, int state)
 737 {
 738         struct mma9553_data *data = iio_priv(indio_dev);
 739         struct mma9553_event *event;
 740         int ret;
 741
 742         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 743         if (!event)
 744                 return -EINVAL;
 745
 746         if (event->enabled == state)
 747                 return 0;
 748
 749         mutex_lock(&data->mutex);
 750
 751         ret = mma9551_set_power_state(data->client, state);
 752         if (ret < 0)
 753                 goto err_out;
 754         event->enabled = state;
 755
 756         ret = mma9553_conf_gpio(data);
 757         if (ret < 0)
 758                 goto err_conf_gpio;
 759
 760         mutex_unlock(&data->mutex);
 761
 762         return 0;
 763
 764 err_conf_gpio:
 765         if (state) {
 766                 event->enabled = false;
 767                 mma9551_set_power_state(data->client, false);
 768         }
 769 err_out:
 770         mutex_unlock(&data->mutex);
 771         return ret;
 772 }
 773
 774 static int mma9553_read_event_value(struct iio_dev *indio_dev,
 775                                     const struct iio_chan_spec *chan,
 776                                     enum iio_event_type type,
 777                                     enum iio_event_direction dir,
 778                                     enum iio_event_info info,
 779                                     int *val, int *val2)
 780 {
 781         struct mma9553_data *data = iio_priv(indio_dev);
 782
 783         *val2 = 0;
 784         switch (info) {
 785         case IIO_EV_INFO_VALUE:
 786                 switch (chan->type) {
 787                 case IIO_STEPS:
 788                         *val = mma9553_get_bits(data->conf.speed_step,
 789                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 790                         return IIO_VAL_INT;
 791                 case IIO_ACTIVITY:
 792                         /*
 793                          * The device does not support confidence value levels.
 794                          * We set an average of 50%.
 795                          */
 796                         *val = 50;
 797                         return IIO_VAL_INT;
 798                 default:
 799                         return -EINVAL;
 800                 }
 801         case IIO_EV_INFO_PERIOD:
 802                 switch (chan->type) {
 803                 case IIO_ACTIVITY:
 804                         *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
 805                         return IIO_VAL_INT;
 806                 default:
 807                         return -EINVAL;
 808                 }
 809         default:
 810                 return -EINVAL;
 811         }
 812 }
 813
 814 static int mma9553_write_event_value(struct iio_dev *indio_dev,
 815                                      const struct iio_chan_spec *chan,
 816                                      enum iio_event_type type,
 817                                      enum iio_event_direction dir,
 818                                      enum iio_event_info info,
 819                                      int val, int val2)
 820 {
 821         struct mma9553_data *data = iio_priv(indio_dev);
 822         int ret;
 823
 824         switch (info) {
 825         case IIO_EV_INFO_VALUE:
 826                 switch (chan->type) {
 827                 case IIO_STEPS:
 828                         if (val < 0 || val > 255)
 829                                 return -EINVAL;
 830                         mutex_lock(&data->mutex);
 831                         ret = mma9553_set_config(data,
 832                                                 MMA9553_REG_CONF_SPEED_STEP,
 833                                                 &data->conf.speed_step, val,
 834                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 835                         mutex_unlock(&data->mutex);
 836                         return ret;
 837                 default:
 838                         return -EINVAL;
 839                 }
 840         case IIO_EV_INFO_PERIOD:
 841                 switch (chan->type) {
 842                 case IIO_ACTIVITY:
 843                         if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
 844                             MMA9553_MAX_ACTTHD))
 845                                 return -EINVAL;
 846                         mutex_lock(&data->mutex);
 847                         ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
 848                                                  &data->conf.actthd,
 849                                                  MMA9553_ACTIVITY_SEC_TO_THD
 850                                                  (val), MMA9553_MASK_CONF_WORD);
 851                         mutex_unlock(&data->mutex);
 852                         return ret;
 853                 default:
 854                         return -EINVAL;
 855                 }
 856         default:
 857                 return -EINVAL;
 858         }
 859 }
 860
 861 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
 862                                         const struct iio_chan_spec *chan)
 863 {
 864         struct mma9553_data *data = iio_priv(indio_dev);
 865         u8 gender;
 866
 867         gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
 868         /*
 869          * HW expects 0 for female and 1 for male,
 870          * while iio index is 0 for male and 1 for female.
 871          */
 872         return !gender;
 873 }
 874
 875 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
 876                                         const struct iio_chan_spec *chan,
 877                                         unsigned int mode)
 878 {
 879         struct mma9553_data *data = iio_priv(indio_dev);
 880         u8 gender = !mode;
 881         int ret;
 882
 883         if ((mode != 0) && (mode != 1))
 884                 return -EINVAL;
 885         mutex_lock(&data->mutex);
 886         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 887                                  &data->conf.filter, gender,
 888                                  MMA9553_MASK_CONF_MALE);
 889         mutex_unlock(&data->mutex);
 890
 891         return ret;
 892 }
 893
 894 static const struct iio_event_spec mma9553_step_event = {
 895         .type = IIO_EV_TYPE_CHANGE,
 896         .dir = IIO_EV_DIR_NONE,
 897         .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
 898 };
 899
 900 static const struct iio_event_spec mma9553_activity_events[] = {
 901         {
 902                 .type = IIO_EV_TYPE_THRESH,
 903                 .dir = IIO_EV_DIR_RISING,
 904                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 905                                  BIT(IIO_EV_INFO_VALUE) |
 906                                  BIT(IIO_EV_INFO_PERIOD),
 907          },
 908         {
 909                 .type = IIO_EV_TYPE_THRESH,
 910                 .dir = IIO_EV_DIR_FALLING,
 911                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 912                                  BIT(IIO_EV_INFO_VALUE) |
 913                                  BIT(IIO_EV_INFO_PERIOD),
 914         },
 915 };
 916
 917 static const char * const mma9553_calibgender_modes[] = { "male", "female" };
 918
 919 static const struct iio_enum mma9553_calibgender_enum = {
 920         .items = mma9553_calibgender_modes,
 921         .num_items = ARRAY_SIZE(mma9553_calibgender_modes),
 922         .get = mma9553_get_calibgender_mode,
 923         .set = mma9553_set_calibgender_mode,
 924 };
 925
 926 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
 927         IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
 928         IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
 929         {},
 930 };
 931
 932 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) {               \
 933         .type = _type,                                          \
 934         .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE)      |  \
 935                               BIT(IIO_CHAN_INFO_CALIBHEIGHT) |  \
 936                               _mask,                            \
 937         .ext_info = mma9553_ext_info,                           \
 938 }
 939
 940 #define MMA9553_ACTIVITY_CHANNEL(_chan2) {                              \
 941         .type = IIO_ACTIVITY,                                           \
 942         .modified = 1,                                                  \
 943         .channel2 = _chan2,                                             \
 944         .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),             \
 945         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) |    \
 946                                     BIT(IIO_CHAN_INFO_ENABLE),          \
 947         .event_spec = mma9553_activity_events,                          \
 948         .num_event_specs = ARRAY_SIZE(mma9553_activity_events),         \
 949         .ext_info = mma9553_ext_info,                                   \
 950 }
 951
 952 static const struct iio_chan_spec mma9553_channels[] = {
 953         MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
 954         MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
 955         MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
 956
 957         {
 958                 .type = IIO_STEPS,
 959                 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
 960                                      BIT(IIO_CHAN_INFO_ENABLE) |
 961                                      BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
 962                                      BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
 963                 .event_spec = &mma9553_step_event,
 964                 .num_event_specs = 1,
 965         },
 966
 967         MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
 968         {
 969                 .type = IIO_VELOCITY,
 970                 .modified = 1,
 971                 .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
 972                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
 973                                       BIT(IIO_CHAN_INFO_SCALE) |
 974                                       BIT(IIO_CHAN_INFO_INT_TIME) |
 975                                       BIT(IIO_CHAN_INFO_ENABLE),
 976                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
 977                 .ext_info = mma9553_ext_info,
 978         },
 979         MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
 980                                   BIT(IIO_CHAN_INFO_SCALE) |
 981                                   BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
 982
 983         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
 984         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
 985         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
 986         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
 987 };
 988
 989 static const struct iio_info mma9553_info = {
 990         .driver_module = THIS_MODULE,
 991         .read_raw = mma9553_read_raw,
 992         .write_raw = mma9553_write_raw,
 993         .read_event_config = mma9553_read_event_config,
 994         .write_event_config = mma9553_write_event_config,
 995         .read_event_value = mma9553_read_event_value,
 996         .write_event_value = mma9553_write_event_value,
 997 };
 998
 999 static irqreturn_t mma9553_irq_handler(int irq, void *private)
1000 {
1001         struct iio_dev *indio_dev = private;
1002         struct mma9553_data *data = iio_priv(indio_dev);
1003
1004         data->timestamp = iio_get_time_ns(indio_dev);
1005         /*
1006          * Since we only configure the interrupt pin when an
1007          * event is enabled, we are sure we have at least
1008          * one event enabled at this point.
1009          */
1010         return IRQ_WAKE_THREAD;
1011 }
1012
1013 static irqreturn_t mma9553_event_handler(int irq, void *private)
1014 {
1015         struct iio_dev *indio_dev = private;
1016         struct mma9553_data *data = iio_priv(indio_dev);
1017         u16 stepcnt;
1018         u8 activity;
1019         struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1020         int ret;
1021
1022         mutex_lock(&data->mutex);
1023         ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1024         if (ret < 0) {
1025                 mutex_unlock(&data->mutex);
1026                 return IRQ_HANDLED;
1027         }
1028
1029         ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1030                                              mma9553_activity_to_mod(
1031                                              data->activity),
1032                                              IIO_EV_DIR_FALLING);
1033         ev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1034                                         mma9553_activity_to_mod(activity),
1035                                         IIO_EV_DIR_RISING);
1036         ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
1037                                            IIO_EV_DIR_NONE);
1038
1039         if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1040                 data->stepcnt = stepcnt;
1041                 iio_push_event(indio_dev,
1042                                IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1043                                               IIO_EV_DIR_NONE,
1044                                               IIO_EV_TYPE_CHANGE, 0, 0, 0),
1045                                data->timestamp);
1046         }
1047
1048         if (activity != data->activity) {
1049                 data->activity = activity;
1050                 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1051                 if (ev_prev_activity && ev_prev_activity->enabled)
1052                         iio_push_event(indio_dev,
1053                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1054                                                     ev_prev_activity->info->mod,
1055                                                     IIO_EV_DIR_FALLING,
1056                                                     IIO_EV_TYPE_THRESH, 0, 0,
1057                                                     0),
1058                                        data->timestamp);
1059
1060                 if (ev_activity && ev_activity->enabled)
1061                         iio_push_event(indio_dev,
1062                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1063                                                       ev_activity->info->mod,
1064                                                       IIO_EV_DIR_RISING,
1065                                                       IIO_EV_TYPE_THRESH, 0, 0,
1066                                                       0),
1067                                        data->timestamp);
1068         }
1069         mutex_unlock(&data->mutex);
1070
1071         return IRQ_HANDLED;
1072 }
1073
1074 static const char *mma9553_match_acpi_device(struct device *dev)
1075 {
1076         const struct acpi_device_id *id;
1077
1078         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1079         if (!id)
1080                 return NULL;
1081
1082         return dev_name(dev);
1083 }
1084
1085 static int mma9553_probe(struct i2c_client *client,
1086                          const struct i2c_device_id *id)
1087 {
1088         struct mma9553_data *data;
1089         struct iio_dev *indio_dev;
1090         const char *name = NULL;
1091         int ret;
1092
1093         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1094         if (!indio_dev)
1095                 return -ENOMEM;
1096
1097         data = iio_priv(indio_dev);
1098         i2c_set_clientdata(client, indio_dev);
1099         data->client = client;
1100
1101         if (id)
1102                 name = id->name;
1103         else if (ACPI_HANDLE(&client->dev))
1104                 name = mma9553_match_acpi_device(&client->dev);
1105         else
1106                 return -ENOSYS;
1107
1108         mutex_init(&data->mutex);
1109         mma9553_init_events(data);
1110
1111         ret = mma9553_init(data);
1112         if (ret < 0)
1113                 return ret;
1114
1115         indio_dev->dev.parent = &client->dev;
1116         indio_dev->channels = mma9553_channels;
1117         indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1118         indio_dev->name = name;
1119         indio_dev->modes = INDIO_DIRECT_MODE;
1120         indio_dev->info = &mma9553_info;
1121
1122         if (client->irq > 0) {
1123                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1124                                                 mma9553_irq_handler,
1125                                                 mma9553_event_handler,
1126                                                 IRQF_TRIGGER_RISING,
1127                                                 MMA9553_IRQ_NAME, indio_dev);
1128                 if (ret < 0) {
1129                         dev_err(&client->dev, "request irq %d failed\n",
1130                                 client->irq);
1131                         goto out_poweroff;
1132                 }
1133         }
1134
1135         ret = pm_runtime_set_active(&client->dev);
1136         if (ret < 0)
1137                 goto out_poweroff;
1138
1139         pm_runtime_enable(&client->dev);
1140         pm_runtime_set_autosuspend_delay(&client->dev,
1141                                          MMA9551_AUTO_SUSPEND_DELAY_MS);
1142         pm_runtime_use_autosuspend(&client->dev);
1143
1144         ret = iio_device_register(indio_dev);
1145         if (ret < 0) {
1146                 dev_err(&client->dev, "unable to register iio device\n");
1147                 goto out_poweroff;
1148         }
1149
1150         dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1151         return 0;
1152
1153 out_poweroff:
1154         mma9551_set_device_state(client, false);
1155         return ret;
1156 }
1157
1158 static int mma9553_remove(struct i2c_client *client)
1159 {
1160         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1161         struct mma9553_data *data = iio_priv(indio_dev);
1162
1163         iio_device_unregister(indio_dev);
1164
1165         pm_runtime_disable(&client->dev);
1166         pm_runtime_set_suspended(&client->dev);
1167         pm_runtime_put_noidle(&client->dev);
1168
1169         mutex_lock(&data->mutex);
1170         mma9551_set_device_state(data->client, false);
1171         mutex_unlock(&data->mutex);
1172
1173         return 0;
1174 }
1175
1176 #ifdef CONFIG_PM
1177 static int mma9553_runtime_suspend(struct device *dev)
1178 {
1179         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1180         struct mma9553_data *data = iio_priv(indio_dev);
1181         int ret;
1182
1183         mutex_lock(&data->mutex);
1184         ret = mma9551_set_device_state(data->client, false);
1185         mutex_unlock(&data->mutex);
1186         if (ret < 0) {
1187                 dev_err(&data->client->dev, "powering off device failed\n");
1188                 return -EAGAIN;
1189         }
1190
1191         return 0;
1192 }
1193
1194 static int mma9553_runtime_resume(struct device *dev)
1195 {
1196         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1197         struct mma9553_data *data = iio_priv(indio_dev);
1198         int ret;
1199
1200         ret = mma9551_set_device_state(data->client, true);
1201         if (ret < 0)
1202                 return ret;
1203
1204         mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1205
1206         return 0;
1207 }
1208 #endif
1209
1210 #ifdef CONFIG_PM_SLEEP
1211 static int mma9553_suspend(struct device *dev)
1212 {
1213         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1214         struct mma9553_data *data = iio_priv(indio_dev);
1215         int ret;
1216
1217         mutex_lock(&data->mutex);
1218         ret = mma9551_set_device_state(data->client, false);
1219         mutex_unlock(&data->mutex);
1220
1221         return ret;
1222 }
1223
1224 static int mma9553_resume(struct device *dev)
1225 {
1226         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1227         struct mma9553_data *data = iio_priv(indio_dev);
1228         int ret;
1229
1230         mutex_lock(&data->mutex);
1231         ret = mma9551_set_device_state(data->client, true);
1232         mutex_unlock(&data->mutex);
1233
1234         return ret;
1235 }
1236 #endif
1237
1238 static const struct dev_pm_ops mma9553_pm_ops = {
1239         SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1240         SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1241                            mma9553_runtime_resume, NULL)
1242 };
1243
1244 static const struct acpi_device_id mma9553_acpi_match[] = {
1245         {"MMA9553", 0},
1246         {},
1247 };
1248
1249 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1250
1251 static const struct i2c_device_id mma9553_id[] = {
1252         {"mma9553", 0},
1253         {},
1254 };
1255
1256 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1257
1258 static struct i2c_driver mma9553_driver = {
1259         .driver = {
1260                    .name = MMA9553_DRV_NAME,
1261                    .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1262                    .pm = &mma9553_pm_ops,
1263                    },
1264         .probe = mma9553_probe,
1265         .remove = mma9553_remove,
1266         .id_table = mma9553_id,
1267 };
1268
1269 module_i2c_driver(mma9553_driver);
1270
1271 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1272 MODULE_LICENSE("GPL v2");
1273 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");