drivers/iio/accel/mma9553.c

   1 /*
   2  * Freescale MMA9553L Intelligent Pedometer driver
   3  * Copyright (c) 2014, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/i2c.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/slab.h>
  19 #include <linux/acpi.h>
  20 #include <linux/gpio/consumer.h>
  21 #include <linux/iio/iio.h>
  22 #include <linux/iio/sysfs.h>
  23 #include <linux/iio/events.h>
  24 #include <linux/pm_runtime.h>
  25 #include "mma9551_core.h"
  26
  27 #define MMA9553_DRV_NAME                        "mma9553"
  28 #define MMA9553_IRQ_NAME                        "mma9553_event"
  29 #define MMA9553_GPIO_NAME                       "mma9553_int"
  30
  31 /* Pedometer configuration registers (R/W) */
  32 #define MMA9553_REG_CONF_SLEEPMIN               0x00
  33 #define MMA9553_REG_CONF_SLEEPMAX               0x02
  34 #define MMA9553_REG_CONF_SLEEPTHD               0x04
  35 #define MMA9553_MASK_CONF_WORD                  GENMASK(15, 0)
  36
  37 #define MMA9553_REG_CONF_CONF_STEPLEN           0x06
  38 #define MMA9553_MASK_CONF_CONFIG                BIT(15)
  39 #define MMA9553_MASK_CONF_ACT_DBCNTM            BIT(14)
  40 #define MMA9553_MASK_CONF_SLP_DBCNTM            BIT(13)
  41 #define MMA9553_MASK_CONF_STEPLEN               GENMASK(7, 0)
  42
  43 #define MMA9553_REG_CONF_HEIGHT_WEIGHT          0x08
  44 #define MMA9553_MASK_CONF_HEIGHT                GENMASK(15, 8)
  45 #define MMA9553_MASK_CONF_WEIGHT                GENMASK(7, 0)
  46
  47 #define MMA9553_REG_CONF_FILTER                 0x0A
  48 #define MMA9553_MASK_CONF_FILTSTEP              GENMASK(15, 8)
  49 #define MMA9553_MASK_CONF_MALE                  BIT(7)
  50 #define MMA9553_MASK_CONF_FILTTIME              GENMASK(6, 0)
  51
  52 #define MMA9553_REG_CONF_SPEED_STEP             0x0C
  53 #define MMA9553_MASK_CONF_SPDPRD                GENMASK(15, 8)
  54 #define MMA9553_MASK_CONF_STEPCOALESCE          GENMASK(7, 0)
  55
  56 #define MMA9553_REG_CONF_ACTTHD                 0x0E
  57 #define MMA9553_MAX_ACTTHD                      GENMASK(15, 0)
  58
  59 /* Pedometer status registers (R-only) */
  60 #define MMA9553_REG_STATUS                      0x00
  61 #define MMA9553_MASK_STATUS_MRGFL               BIT(15)
  62 #define MMA9553_MASK_STATUS_SUSPCHG             BIT(14)
  63 #define MMA9553_MASK_STATUS_STEPCHG             BIT(13)
  64 #define MMA9553_MASK_STATUS_ACTCHG              BIT(12)
  65 #define MMA9553_MASK_STATUS_SUSP                BIT(11)
  66 #define MMA9553_MASK_STATUS_ACTIVITY            GENMASK(10, 8)
  67 #define MMA9553_MASK_STATUS_VERSION             GENMASK(7, 0)
  68
  69 #define MMA9553_REG_STEPCNT                     0x02
  70 #define MMA9553_REG_DISTANCE                    0x04
  71 #define MMA9553_REG_SPEED                       0x06
  72 #define MMA9553_REG_CALORIES                    0x08
  73 #define MMA9553_REG_SLEEPCNT                    0x0A
  74
  75 /* Pedometer events are always mapped to this pin. */
  76 #define MMA9553_DEFAULT_GPIO_PIN        mma9551_gpio6
  77 #define MMA9553_DEFAULT_GPIO_POLARITY   0
  78
  79 /* Bitnum used for GPIO configuration = bit number in high status byte */
  80 #define MMA9553_STATUS_TO_BITNUM(bit)   (ffs(bit) - 9)
  81 #define MMA9553_MAX_BITNUM              MMA9553_STATUS_TO_BITNUM(BIT(16))
  82
  83 #define MMA9553_DEFAULT_SAMPLE_RATE     30      /* Hz */
  84
  85 /*
  86  * The internal activity level must be stable for ACTTHD samples before
  87  * ACTIVITY is updated. The ACTIVITY variable contains the current activity
  88  * level and is updated every time a step is detected or once a second
  89  * if there are no steps.
  90  */
  91 #define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
  92 #define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
  93
  94 /*
  95  * Autonomously suspend pedometer if acceleration vector magnitude
  96  * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
  97  */
  98 #define MMA9553_DEFAULT_SLEEPMIN        3688    /* 0,9 g */
  99 #define MMA9553_DEFAULT_SLEEPMAX        4508    /* 1,1 g */
 100 #define MMA9553_DEFAULT_SLEEPTHD        (MMA9553_DEFAULT_SAMPLE_RATE * 30)
 101
 102 #define MMA9553_CONFIG_RETRIES          2
 103
 104 /* Status register - activity field  */
 105 enum activity_level {
 106         ACTIVITY_UNKNOWN,
 107         ACTIVITY_REST,
 108         ACTIVITY_WALKING,
 109         ACTIVITY_JOGGING,
 110         ACTIVITY_RUNNING,
 111 };
 112
 113 static struct mma9553_event_info {
 114         enum iio_chan_type type;
 115         enum iio_modifier mod;
 116         enum iio_event_direction dir;
 117 } mma9553_events_info[] = {
 118         {
 119                 .type = IIO_STEPS,
 120                 .mod = IIO_NO_MOD,
 121                 .dir = IIO_EV_DIR_NONE,
 122         },
 123         {
 124                 .type = IIO_ACTIVITY,
 125                 .mod = IIO_MOD_STILL,
 126                 .dir = IIO_EV_DIR_RISING,
 127         },
 128         {
 129                 .type = IIO_ACTIVITY,
 130                 .mod = IIO_MOD_STILL,
 131                 .dir = IIO_EV_DIR_FALLING,
 132         },
 133         {
 134                 .type = IIO_ACTIVITY,
 135                 .mod = IIO_MOD_WALKING,
 136                 .dir = IIO_EV_DIR_RISING,
 137         },
 138         {
 139                 .type = IIO_ACTIVITY,
 140                 .mod = IIO_MOD_WALKING,
 141                 .dir = IIO_EV_DIR_FALLING,
 142         },
 143         {
 144                 .type = IIO_ACTIVITY,
 145                 .mod = IIO_MOD_JOGGING,
 146                 .dir = IIO_EV_DIR_RISING,
 147         },
 148         {
 149                 .type = IIO_ACTIVITY,
 150                 .mod = IIO_MOD_JOGGING,
 151                 .dir = IIO_EV_DIR_FALLING,
 152         },
 153         {
 154                 .type = IIO_ACTIVITY,
 155                 .mod = IIO_MOD_RUNNING,
 156                 .dir = IIO_EV_DIR_RISING,
 157         },
 158         {
 159                 .type = IIO_ACTIVITY,
 160                 .mod = IIO_MOD_RUNNING,
 161                 .dir = IIO_EV_DIR_FALLING,
 162         },
 163 };
 164
 165 #define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
 166
 167 struct mma9553_event {
 168         struct mma9553_event_info *info;
 169         bool enabled;
 170 };
 171
 172 struct mma9553_conf_regs {
 173         u16 sleepmin;
 174         u16 sleepmax;
 175         u16 sleepthd;
 176         u16 config;
 177         u16 height_weight;
 178         u16 filter;
 179         u16 speed_step;
 180         u16 actthd;
 181 } __packed;
 182
 183 struct mma9553_data {
 184         struct i2c_client *client;
 185         /*
 186          * 1. Serialize access to HW (requested by mma9551_core API).
 187          * 2. Serialize sequences that power on/off the device and access HW.
 188          */
 189         struct mutex mutex;
 190         struct mma9553_conf_regs conf;
 191         struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
 192         int num_events;
 193         u8 gpio_bitnum;
 194         /*
 195          * This is used for all features that depend on step count:
 196          * step count, distance, speed, calories.
 197          */
 198         bool stepcnt_enabled;
 199         u16 stepcnt;
 200         u8 activity;
 201         s64 timestamp;
 202 };
 203
 204 static u8 mma9553_get_bits(u16 val, u16 mask)
 205 {
 206         return (val & mask) >> (ffs(mask) - 1);
 207 }
 208
 209 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
 210 {
 211         return (current_val & ~mask) | (val << (ffs(mask) - 1));
 212 }
 213
 214 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
 215 {
 216         switch (activity) {
 217         case ACTIVITY_RUNNING:
 218                 return IIO_MOD_RUNNING;
 219         case ACTIVITY_JOGGING:
 220                 return IIO_MOD_JOGGING;
 221         case ACTIVITY_WALKING:
 222                 return IIO_MOD_WALKING;
 223         case ACTIVITY_REST:
 224                 return IIO_MOD_STILL;
 225         case ACTIVITY_UNKNOWN:
 226         default:
 227                 return IIO_NO_MOD;
 228         }
 229 }
 230
 231 static void mma9553_init_events(struct mma9553_data *data)
 232 {
 233         int i;
 234
 235         data->num_events = MMA9553_EVENTS_INFO_SIZE;
 236         for (i = 0; i < data->num_events; i++) {
 237                 data->events[i].info = &mma9553_events_info[i];
 238                 data->events[i].enabled = false;
 239         }
 240 }
 241
 242 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
 243                                                enum iio_chan_type type,
 244                                                enum iio_modifier mod,
 245                                                enum iio_event_direction dir)
 246 {
 247         int i;
 248
 249         for (i = 0; i < data->num_events; i++)
 250                 if (data->events[i].info->type == type &&
 251                     data->events[i].info->mod == mod &&
 252                     data->events[i].info->dir == dir)
 253                         return &data->events[i];
 254
 255         return NULL;
 256 }
 257
 258 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
 259                                          bool check_type,
 260                                          enum iio_chan_type type)
 261 {
 262         int i;
 263
 264         for (i = 0; i < data->num_events; i++)
 265                 if ((check_type && data->events[i].info->type == type &&
 266                      data->events[i].enabled) ||
 267                      (!check_type && data->events[i].enabled))
 268                         return true;
 269
 270         return false;
 271 }
 272
 273 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
 274                               u16 *p_reg_val, u16 val, u16 mask)
 275 {
 276         int ret, retries;
 277         u16 reg_val, config;
 278
 279         reg_val = *p_reg_val;
 280         if (val == mma9553_get_bits(reg_val, mask))
 281                 return 0;
 282
 283         reg_val = mma9553_set_bits(reg_val, val, mask);
 284         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 285                                         reg, reg_val);
 286         if (ret < 0) {
 287                 dev_err(&data->client->dev,
 288                         "error writing config register 0x%x\n", reg);
 289                 return ret;
 290         }
 291
 292         *p_reg_val = reg_val;
 293
 294         /* Reinitializes the pedometer with current configuration values */
 295         config = mma9553_set_bits(data->conf.config, 1,
 296                                   MMA9553_MASK_CONF_CONFIG);
 297
 298         ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
 299                                         MMA9553_REG_CONF_CONF_STEPLEN, config);
 300         if (ret < 0) {
 301                 dev_err(&data->client->dev,
 302                         "error writing config register 0x%x\n",
 303                         MMA9553_REG_CONF_CONF_STEPLEN);
 304                 return ret;
 305         }
 306
 307         retries = MMA9553_CONFIG_RETRIES;
 308         do {
 309                 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
 310                 ret = mma9551_read_config_word(data->client,
 311                                                MMA9551_APPID_PEDOMETER,
 312                                                MMA9553_REG_CONF_CONF_STEPLEN,
 313                                                &config);
 314                 if (ret < 0)
 315                         return ret;
 316         } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
 317                  --retries > 0);
 318
 319         return 0;
 320 }
 321
 322 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
 323                                          u8 *activity, u16 *stepcnt)
 324 {
 325         u16 buf[2];
 326         int ret;
 327
 328         ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
 329                                         MMA9553_REG_STATUS, ARRAY_SIZE(buf),
 330                                         buf);
 331         if (ret < 0) {
 332                 dev_err(&data->client->dev,
 333                         "error reading status and stepcnt\n");
 334                 return ret;
 335         }
 336
 337         *activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
 338         *stepcnt = buf[1];
 339
 340         return 0;
 341 }
 342
 343 static int mma9553_conf_gpio(struct mma9553_data *data)
 344 {
 345         u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
 346         int ret;
 347         struct mma9553_event *ev_step_detect;
 348         bool activity_enabled;
 349
 350         activity_enabled = mma9553_is_any_event_enabled(data, true,
 351                                                         IIO_ACTIVITY);
 352         ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
 353                                            IIO_EV_DIR_NONE);
 354
 355         /*
 356          * If both step detector and activity are enabled, use the MRGFL bit.
 357          * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
 358          */
 359         if (activity_enabled && ev_step_detect->enabled)
 360                 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
 361         else if (ev_step_detect->enabled)
 362                 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
 363         else if (activity_enabled)
 364                 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
 365         else                    /* Reset */
 366                 appid = MMA9551_APPID_NONE;
 367
 368         if (data->gpio_bitnum == bitnum)
 369                 return 0;
 370
 371         /* Save initial values for activity and stepcnt */
 372         if (activity_enabled || ev_step_detect->enabled) {
 373                 ret = mma9553_read_activity_stepcnt(data, &data->activity,
 374                                                     &data->stepcnt);
 375                 if (ret < 0)
 376                         return ret;
 377         }
 378
 379         ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid,
 380                                   bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
 381         if (ret < 0)
 382                 return ret;
 383         data->gpio_bitnum = bitnum;
 384
 385         return 0;
 386 }
 387
 388 static int mma9553_init(struct mma9553_data *data)
 389 {
 390         int ret;
 391
 392         ret = mma9551_read_version(data->client);
 393         if (ret)
 394                 return ret;
 395
 396         /*
 397          * Read all the pedometer configuration registers. This is used as
 398          * a device identification command to differentiate the MMA9553L
 399          * from the MMA9550L.
 400          */
 401         ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
 402                                         MMA9553_REG_CONF_SLEEPMIN,
 403                                         sizeof(data->conf) / sizeof(u16),
 404                                         (u16 *)&data->conf);
 405         if (ret < 0) {
 406                 dev_err(&data->client->dev,
 407                         "failed to read configuration registers\n");
 408                 return ret;
 409         }
 410
 411         /* Reset GPIO */
 412         data->gpio_bitnum = MMA9553_MAX_BITNUM;
 413         ret = mma9553_conf_gpio(data);
 414         if (ret < 0)
 415                 return ret;
 416
 417         ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
 418         if (ret < 0)
 419                 return ret;
 420
 421         /* Init config registers */
 422         data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
 423         data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
 424         data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
 425         data->conf.config = mma9553_set_bits(data->conf.config, 1,
 426                                              MMA9553_MASK_CONF_CONFIG);
 427         /*
 428          * Clear the activity debounce counter when the activity level changes,
 429          * so that the confidence level applies for any activity level.
 430          */
 431         data->conf.config = mma9553_set_bits(data->conf.config, 1,
 432                                              MMA9553_MASK_CONF_ACT_DBCNTM);
 433         ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
 434                                          MMA9553_REG_CONF_SLEEPMIN,
 435                                          sizeof(data->conf) / sizeof(u16),
 436                                          (u16 *)&data->conf);
 437         if (ret < 0) {
 438                 dev_err(&data->client->dev,
 439                         "failed to write configuration registers\n");
 440                 return ret;
 441         }
 442
 443         return mma9551_set_device_state(data->client, true);
 444 }
 445
 446 static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
 447                                     u16 *tmp)
 448 {
 449         bool powered_on;
 450         int ret;
 451
 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          */
 458         powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
 459                      data->stepcnt_enabled;
 460         if (!powered_on) {
 461                 dev_err(&data->client->dev, "No channels enabled\n");
 462                 return -EINVAL;
 463         }
 464
 465         mutex_lock(&data->mutex);
 466         ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
 467                                        reg, tmp);
 468         mutex_unlock(&data->mutex);
 469         return ret;
 470 }
 471
 472 static int mma9553_read_raw(struct iio_dev *indio_dev,
 473                             struct iio_chan_spec const *chan,
 474                             int *val, int *val2, long mask)
 475 {
 476         struct mma9553_data *data = iio_priv(indio_dev);
 477         int ret;
 478         u16 tmp;
 479         u8 activity;
 480
 481         switch (mask) {
 482         case IIO_CHAN_INFO_PROCESSED:
 483                 switch (chan->type) {
 484                 case IIO_STEPS:
 485                         ret = mma9553_read_status_word(data,
 486                                                        MMA9553_REG_STEPCNT,
 487                                                        &tmp);
 488                         if (ret < 0)
 489                                 return ret;
 490                         *val = tmp;
 491                         return IIO_VAL_INT;
 492                 case IIO_DISTANCE:
 493                         ret = mma9553_read_status_word(data,
 494                                                        MMA9553_REG_DISTANCE,
 495                                                        &tmp);
 496                         if (ret < 0)
 497                                 return ret;
 498                         *val = tmp;
 499                         return IIO_VAL_INT;
 500                 case IIO_ACTIVITY:
 501                         ret = mma9553_read_status_word(data,
 502                                                        MMA9553_REG_STATUS,
 503                                                        &tmp);
 504                         if (ret < 0)
 505                                 return ret;
 506
 507                         activity =
 508                             mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
 509
 510                         /*
 511                          * The device does not support confidence value levels,
 512                          * so we will always have 100% for current activity and
 513                          * 0% for the others.
 514                          */
 515                         if (chan->channel2 == mma9553_activity_to_mod(activity))
 516                                 *val = 100;
 517                         else
 518                                 *val = 0;
 519                         return IIO_VAL_INT;
 520                 default:
 521                         return -EINVAL;
 522                 }
 523         case IIO_CHAN_INFO_RAW:
 524                 switch (chan->type) {
 525                 case IIO_VELOCITY:      /* m/h */
 526                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 527                                 return -EINVAL;
 528                         ret = mma9553_read_status_word(data,
 529                                                        MMA9553_REG_SPEED,
 530                                                        &tmp);
 531                         if (ret < 0)
 532                                 return ret;
 533                         *val = tmp;
 534                         return IIO_VAL_INT;
 535                 case IIO_ENERGY:        /* Cal or kcal */
 536                         ret = mma9553_read_status_word(data,
 537                                                        MMA9553_REG_CALORIES,
 538                                                        &tmp);
 539                         if (ret < 0)
 540                                 return ret;
 541                         *val = tmp;
 542                         return IIO_VAL_INT;
 543                 case IIO_ACCEL:
 544                         mutex_lock(&data->mutex);
 545                         ret = mma9551_read_accel_chan(data->client,
 546                                                       chan, val, val2);
 547                         mutex_unlock(&data->mutex);
 548                         return ret;
 549                 default:
 550                         return -EINVAL;
 551                 }
 552         case IIO_CHAN_INFO_SCALE:
 553                 switch (chan->type) {
 554                 case IIO_VELOCITY:      /* m/h to m/s */
 555                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 556                                 return -EINVAL;
 557                         *val = 0;
 558                         *val2 = 277;    /* 0.000277 */
 559                         return IIO_VAL_INT_PLUS_MICRO;
 560                 case IIO_ENERGY:        /* Cal or kcal to J */
 561                         *val = 4184;
 562                         return IIO_VAL_INT;
 563                 case IIO_ACCEL:
 564                         return mma9551_read_accel_scale(val, val2);
 565                 default:
 566                         return -EINVAL;
 567                 }
 568         case IIO_CHAN_INFO_ENABLE:
 569                 *val = data->stepcnt_enabled;
 570                 return IIO_VAL_INT;
 571         case IIO_CHAN_INFO_CALIBHEIGHT:
 572                 tmp = mma9553_get_bits(data->conf.height_weight,
 573                                        MMA9553_MASK_CONF_HEIGHT);
 574                 *val = tmp / 100;       /* cm to m */
 575                 *val2 = (tmp % 100) * 10000;
 576                 return IIO_VAL_INT_PLUS_MICRO;
 577         case IIO_CHAN_INFO_CALIBWEIGHT:
 578                 *val = mma9553_get_bits(data->conf.height_weight,
 579                                         MMA9553_MASK_CONF_WEIGHT);
 580                 return IIO_VAL_INT;
 581         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 582                 switch (chan->type) {
 583                 case IIO_STEPS:
 584                         *val = mma9553_get_bits(data->conf.filter,
 585                                                 MMA9553_MASK_CONF_FILTSTEP);
 586                         return IIO_VAL_INT;
 587                 default:
 588                         return -EINVAL;
 589                 }
 590         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 591                 switch (chan->type) {
 592                 case IIO_STEPS:
 593                         *val = mma9553_get_bits(data->conf.filter,
 594                                                 MMA9553_MASK_CONF_FILTTIME);
 595                         return IIO_VAL_INT;
 596                 default:
 597                         return -EINVAL;
 598                 }
 599         case IIO_CHAN_INFO_INT_TIME:
 600                 switch (chan->type) {
 601                 case IIO_VELOCITY:
 602                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 603                                 return -EINVAL;
 604                         *val = mma9553_get_bits(data->conf.speed_step,
 605                                                 MMA9553_MASK_CONF_SPDPRD);
 606                         return IIO_VAL_INT;
 607                 default:
 608                         return -EINVAL;
 609                 }
 610         default:
 611                 return -EINVAL;
 612         }
 613 }
 614
 615 static int mma9553_write_raw(struct iio_dev *indio_dev,
 616                              struct iio_chan_spec const *chan,
 617                              int val, int val2, long mask)
 618 {
 619         struct mma9553_data *data = iio_priv(indio_dev);
 620         int ret, tmp;
 621
 622         switch (mask) {
 623         case IIO_CHAN_INFO_ENABLE:
 624                 if (data->stepcnt_enabled == !!val)
 625                         return 0;
 626                 mutex_lock(&data->mutex);
 627                 ret = mma9551_set_power_state(data->client, val);
 628                 if (ret < 0) {
 629                         mutex_unlock(&data->mutex);
 630                         return ret;
 631                 }
 632                 data->stepcnt_enabled = val;
 633                 mutex_unlock(&data->mutex);
 634                 return 0;
 635         case IIO_CHAN_INFO_CALIBHEIGHT:
 636                 /* m to cm */
 637                 tmp = val * 100 + val2 / 10000;
 638                 if (tmp < 0 || tmp > 255)
 639                         return -EINVAL;
 640                 mutex_lock(&data->mutex);
 641                 ret = mma9553_set_config(data,
 642                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 643                                          &data->conf.height_weight,
 644                                          tmp, MMA9553_MASK_CONF_HEIGHT);
 645                 mutex_unlock(&data->mutex);
 646                 return ret;
 647         case IIO_CHAN_INFO_CALIBWEIGHT:
 648                 if (val < 0 || val > 255)
 649                         return -EINVAL;
 650                 mutex_lock(&data->mutex);
 651                 ret = mma9553_set_config(data,
 652                                          MMA9553_REG_CONF_HEIGHT_WEIGHT,
 653                                          &data->conf.height_weight,
 654                                          val, MMA9553_MASK_CONF_WEIGHT);
 655                 mutex_unlock(&data->mutex);
 656                 return ret;
 657         case IIO_CHAN_INFO_DEBOUNCE_COUNT:
 658                 switch (chan->type) {
 659                 case IIO_STEPS:
 660                         /*
 661                          * Set to 0 to disable step filtering. If the value
 662                          * specified is greater than 6, then 6 will be used.
 663                          */
 664                         if (val < 0)
 665                                 return -EINVAL;
 666                         if (val > 6)
 667                                 val = 6;
 668                         mutex_lock(&data->mutex);
 669                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 670                                                  &data->conf.filter, val,
 671                                                  MMA9553_MASK_CONF_FILTSTEP);
 672                         mutex_unlock(&data->mutex);
 673                         return ret;
 674                 default:
 675                         return -EINVAL;
 676                 }
 677         case IIO_CHAN_INFO_DEBOUNCE_TIME:
 678                 switch (chan->type) {
 679                 case IIO_STEPS:
 680                         if (val < 0 || val > 127)
 681                                 return -EINVAL;
 682                         mutex_lock(&data->mutex);
 683                         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 684                                                  &data->conf.filter, val,
 685                                                  MMA9553_MASK_CONF_FILTTIME);
 686                         mutex_unlock(&data->mutex);
 687                         return ret;
 688                 default:
 689                         return -EINVAL;
 690                 }
 691         case IIO_CHAN_INFO_INT_TIME:
 692                 switch (chan->type) {
 693                 case IIO_VELOCITY:
 694                         if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
 695                                 return -EINVAL;
 696                         /*
 697                          * If set to a value greater than 5, then 5 will be
 698                          * used. Warning: Do not set SPDPRD to 0 or 1 as
 699                          * this may cause undesirable behavior.
 700                          */
 701                         if (val < 2)
 702                                 return -EINVAL;
 703                         if (val > 5)
 704                                 val = 5;
 705                         mutex_lock(&data->mutex);
 706                         ret = mma9553_set_config(data,
 707                                                  MMA9553_REG_CONF_SPEED_STEP,
 708                                                  &data->conf.speed_step, val,
 709                                                  MMA9553_MASK_CONF_SPDPRD);
 710                         mutex_unlock(&data->mutex);
 711                         return ret;
 712                 default:
 713                         return -EINVAL;
 714                 }
 715         default:
 716                 return -EINVAL;
 717         }
 718 }
 719
 720 static int mma9553_read_event_config(struct iio_dev *indio_dev,
 721                                      const struct iio_chan_spec *chan,
 722                                      enum iio_event_type type,
 723                                      enum iio_event_direction dir)
 724 {
 725         struct mma9553_data *data = iio_priv(indio_dev);
 726         struct mma9553_event *event;
 727
 728         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 729         if (!event)
 730                 return -EINVAL;
 731
 732         return event->enabled;
 733 }
 734
 735 static int mma9553_write_event_config(struct iio_dev *indio_dev,
 736                                       const struct iio_chan_spec *chan,
 737                                       enum iio_event_type type,
 738                                       enum iio_event_direction dir, int state)
 739 {
 740         struct mma9553_data *data = iio_priv(indio_dev);
 741         struct mma9553_event *event;
 742         int ret;
 743
 744         event = mma9553_get_event(data, chan->type, chan->channel2, dir);
 745         if (!event)
 746                 return -EINVAL;
 747
 748         if (event->enabled == state)
 749                 return 0;
 750
 751         mutex_lock(&data->mutex);
 752
 753         ret = mma9551_set_power_state(data->client, state);
 754         if (ret < 0)
 755                 goto err_out;
 756         event->enabled = state;
 757
 758         ret = mma9553_conf_gpio(data);
 759         if (ret < 0)
 760                 goto err_conf_gpio;
 761
 762         mutex_unlock(&data->mutex);
 763
 764         return 0;
 765
 766 err_conf_gpio:
 767         if (state) {
 768                 event->enabled = false;
 769                 mma9551_set_power_state(data->client, false);
 770         }
 771 err_out:
 772         mutex_unlock(&data->mutex);
 773         return ret;
 774 }
 775
 776 static int mma9553_read_event_value(struct iio_dev *indio_dev,
 777                                     const struct iio_chan_spec *chan,
 778                                     enum iio_event_type type,
 779                                     enum iio_event_direction dir,
 780                                     enum iio_event_info info,
 781                                     int *val, int *val2)
 782 {
 783         struct mma9553_data *data = iio_priv(indio_dev);
 784
 785         *val2 = 0;
 786         switch (info) {
 787         case IIO_EV_INFO_VALUE:
 788                 switch (chan->type) {
 789                 case IIO_STEPS:
 790                         *val = mma9553_get_bits(data->conf.speed_step,
 791                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 792                         return IIO_VAL_INT;
 793                 case IIO_ACTIVITY:
 794                         /*
 795                          * The device does not support confidence value levels.
 796                          * We set an average of 50%.
 797                          */
 798                         *val = 50;
 799                         return IIO_VAL_INT;
 800                 default:
 801                         return -EINVAL;
 802                 }
 803         case IIO_EV_INFO_PERIOD:
 804                 switch (chan->type) {
 805                 case IIO_ACTIVITY:
 806                         *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
 807                         return IIO_VAL_INT;
 808                 default:
 809                         return -EINVAL;
 810                 }
 811         default:
 812                 return -EINVAL;
 813         }
 814 }
 815
 816 static int mma9553_write_event_value(struct iio_dev *indio_dev,
 817                                      const struct iio_chan_spec *chan,
 818                                      enum iio_event_type type,
 819                                      enum iio_event_direction dir,
 820                                      enum iio_event_info info,
 821                                      int val, int val2)
 822 {
 823         struct mma9553_data *data = iio_priv(indio_dev);
 824         int ret;
 825
 826         switch (info) {
 827         case IIO_EV_INFO_VALUE:
 828                 switch (chan->type) {
 829                 case IIO_STEPS:
 830                         if (val < 0 || val > 255)
 831                                 return -EINVAL;
 832                         mutex_lock(&data->mutex);
 833                         ret = mma9553_set_config(data,
 834                                                 MMA9553_REG_CONF_SPEED_STEP,
 835                                                 &data->conf.speed_step, val,
 836                                                 MMA9553_MASK_CONF_STEPCOALESCE);
 837                         mutex_unlock(&data->mutex);
 838                         return ret;
 839                 default:
 840                         return -EINVAL;
 841                 }
 842         case IIO_EV_INFO_PERIOD:
 843                 switch (chan->type) {
 844                 case IIO_ACTIVITY:
 845                         if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
 846                             MMA9553_MAX_ACTTHD))
 847                                 return -EINVAL;
 848                         mutex_lock(&data->mutex);
 849                         ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
 850                                                  &data->conf.actthd,
 851                                                  MMA9553_ACTIVITY_SEC_TO_THD
 852                                                  (val), MMA9553_MASK_CONF_WORD);
 853                         mutex_unlock(&data->mutex);
 854                         return ret;
 855                 default:
 856                         return -EINVAL;
 857                 }
 858         default:
 859                 return -EINVAL;
 860         }
 861 }
 862
 863 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
 864                                         const struct iio_chan_spec *chan)
 865 {
 866         struct mma9553_data *data = iio_priv(indio_dev);
 867         u8 gender;
 868
 869         gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
 870         /*
 871          * HW expects 0 for female and 1 for male,
 872          * while iio index is 0 for male and 1 for female.
 873          */
 874         return !gender;
 875 }
 876
 877 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
 878                                         const struct iio_chan_spec *chan,
 879                                         unsigned int mode)
 880 {
 881         struct mma9553_data *data = iio_priv(indio_dev);
 882         u8 gender = !mode;
 883         int ret;
 884
 885         if ((mode != 0) && (mode != 1))
 886                 return -EINVAL;
 887         mutex_lock(&data->mutex);
 888         ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
 889                                  &data->conf.filter, gender,
 890                                  MMA9553_MASK_CONF_MALE);
 891         mutex_unlock(&data->mutex);
 892
 893         return ret;
 894 }
 895
 896 static const struct iio_event_spec mma9553_step_event = {
 897         .type = IIO_EV_TYPE_CHANGE,
 898         .dir = IIO_EV_DIR_NONE,
 899         .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
 900 };
 901
 902 static const struct iio_event_spec mma9553_activity_events[] = {
 903         {
 904                 .type = IIO_EV_TYPE_THRESH,
 905                 .dir = IIO_EV_DIR_RISING,
 906                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 907                                  BIT(IIO_EV_INFO_VALUE) |
 908                                  BIT(IIO_EV_INFO_PERIOD),
 909          },
 910         {
 911                 .type = IIO_EV_TYPE_THRESH,
 912                 .dir = IIO_EV_DIR_FALLING,
 913                 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
 914                                  BIT(IIO_EV_INFO_VALUE) |
 915                                  BIT(IIO_EV_INFO_PERIOD),
 916         },
 917 };
 918
 919 static const char * const mma9553_calibgender_modes[] = { "male", "female" };
 920
 921 static const struct iio_enum mma9553_calibgender_enum = {
 922         .items = mma9553_calibgender_modes,
 923         .num_items = ARRAY_SIZE(mma9553_calibgender_modes),
 924         .get = mma9553_get_calibgender_mode,
 925         .set = mma9553_set_calibgender_mode,
 926 };
 927
 928 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
 929         IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
 930         IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
 931         {},
 932 };
 933
 934 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) {               \
 935         .type = _type,                                          \
 936         .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE)      |  \
 937                               BIT(IIO_CHAN_INFO_CALIBHEIGHT) |  \
 938                               _mask,                            \
 939         .ext_info = mma9553_ext_info,                           \
 940 }
 941
 942 #define MMA9553_ACTIVITY_CHANNEL(_chan2) {                              \
 943         .type = IIO_ACTIVITY,                                           \
 944         .modified = 1,                                                  \
 945         .channel2 = _chan2,                                             \
 946         .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),             \
 947         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) |    \
 948                                     BIT(IIO_CHAN_INFO_ENABLE),          \
 949         .event_spec = mma9553_activity_events,                          \
 950         .num_event_specs = ARRAY_SIZE(mma9553_activity_events),         \
 951         .ext_info = mma9553_ext_info,                                   \
 952 }
 953
 954 static const struct iio_chan_spec mma9553_channels[] = {
 955         MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
 956         MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
 957         MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
 958
 959         {
 960                 .type = IIO_STEPS,
 961                 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
 962                                      BIT(IIO_CHAN_INFO_ENABLE) |
 963                                      BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
 964                                      BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
 965                 .event_spec = &mma9553_step_event,
 966                 .num_event_specs = 1,
 967         },
 968
 969         MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
 970         {
 971                 .type = IIO_VELOCITY,
 972                 .modified = 1,
 973                 .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
 974                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
 975                                       BIT(IIO_CHAN_INFO_SCALE) |
 976                                       BIT(IIO_CHAN_INFO_INT_TIME) |
 977                                       BIT(IIO_CHAN_INFO_ENABLE),
 978                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
 979                 .ext_info = mma9553_ext_info,
 980         },
 981         MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
 982                                   BIT(IIO_CHAN_INFO_SCALE) |
 983                                   BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
 984
 985         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
 986         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
 987         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
 988         MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
 989 };
 990
 991 static const struct iio_info mma9553_info = {
 992         .driver_module = THIS_MODULE,
 993         .read_raw = mma9553_read_raw,
 994         .write_raw = mma9553_write_raw,
 995         .read_event_config = mma9553_read_event_config,
 996         .write_event_config = mma9553_write_event_config,
 997         .read_event_value = mma9553_read_event_value,
 998         .write_event_value = mma9553_write_event_value,
 999 };
1000
1001 static irqreturn_t mma9553_irq_handler(int irq, void *private)
1002 {
1003         struct iio_dev *indio_dev = private;
1004         struct mma9553_data *data = iio_priv(indio_dev);
1005
1006         data->timestamp = iio_get_time_ns();
1007         /*
1008          * Since we only configure the interrupt pin when an
1009          * event is enabled, we are sure we have at least
1010          * one event enabled at this point.
1011          */
1012         return IRQ_WAKE_THREAD;
1013 }
1014
1015 static irqreturn_t mma9553_event_handler(int irq, void *private)
1016 {
1017         struct iio_dev *indio_dev = private;
1018         struct mma9553_data *data = iio_priv(indio_dev);
1019         u16 stepcnt;
1020         u8 activity;
1021         struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1022         int ret;
1023
1024         mutex_lock(&data->mutex);
1025         ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1026         if (ret < 0) {
1027                 mutex_unlock(&data->mutex);
1028                 return IRQ_HANDLED;
1029         }
1030
1031         ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1032                                              mma9553_activity_to_mod(
1033                                              data->activity),
1034                                              IIO_EV_DIR_FALLING);
1035         ev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1036                                         mma9553_activity_to_mod(activity),
1037                                         IIO_EV_DIR_RISING);
1038         ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
1039                                            IIO_EV_DIR_NONE);
1040
1041         if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1042                 data->stepcnt = stepcnt;
1043                 iio_push_event(indio_dev,
1044                                IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
1045                                               IIO_EV_DIR_NONE,
1046                                               IIO_EV_TYPE_CHANGE, 0, 0, 0),
1047                                data->timestamp);
1048         }
1049
1050         if (activity != data->activity) {
1051                 data->activity = activity;
1052                 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1053                 if (ev_prev_activity && ev_prev_activity->enabled)
1054                         iio_push_event(indio_dev,
1055                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1056                                                     ev_prev_activity->info->mod,
1057                                                     IIO_EV_DIR_FALLING,
1058                                                     IIO_EV_TYPE_THRESH, 0, 0,
1059                                                     0),
1060                                        data->timestamp);
1061
1062                 if (ev_activity && ev_activity->enabled)
1063                         iio_push_event(indio_dev,
1064                                        IIO_EVENT_CODE(IIO_ACTIVITY, 0,
1065                                                       ev_activity->info->mod,
1066                                                       IIO_EV_DIR_RISING,
1067                                                       IIO_EV_TYPE_THRESH, 0, 0,
1068                                                       0),
1069                                        data->timestamp);
1070         }
1071         mutex_unlock(&data->mutex);
1072
1073         return IRQ_HANDLED;
1074 }
1075
1076 static int mma9553_gpio_probe(struct i2c_client *client)
1077 {
1078         struct device *dev;
1079         struct gpio_desc *gpio;
1080         int ret;
1081
1082         if (!client)
1083                 return -EINVAL;
1084
1085         dev = &client->dev;
1086
1087         /* data ready GPIO interrupt pin */
1088         gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
1089         if (IS_ERR(gpio)) {
1090                 dev_err(dev, "ACPI GPIO get index failed\n");
1091                 return PTR_ERR(gpio);
1092         }
1093
1094         ret = gpiod_to_irq(gpio);
1095
1096         dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
1097
1098         return ret;
1099 }
1100
1101 static const char *mma9553_match_acpi_device(struct device *dev)
1102 {
1103         const struct acpi_device_id *id;
1104
1105         id = acpi_match_device(dev->driver->acpi_match_table, dev);
1106         if (!id)
1107                 return NULL;
1108
1109         return dev_name(dev);
1110 }
1111
1112 static int mma9553_probe(struct i2c_client *client,
1113                          const struct i2c_device_id *id)
1114 {
1115         struct mma9553_data *data;
1116         struct iio_dev *indio_dev;
1117         const char *name = NULL;
1118         int ret;
1119
1120         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1121         if (!indio_dev)
1122                 return -ENOMEM;
1123
1124         data = iio_priv(indio_dev);
1125         i2c_set_clientdata(client, indio_dev);
1126         data->client = client;
1127
1128         if (id)
1129                 name = id->name;
1130         else if (ACPI_HANDLE(&client->dev))
1131                 name = mma9553_match_acpi_device(&client->dev);
1132         else
1133                 return -ENOSYS;
1134
1135         mutex_init(&data->mutex);
1136         mma9553_init_events(data);
1137
1138         ret = mma9553_init(data);
1139         if (ret < 0)
1140                 return ret;
1141
1142         indio_dev->dev.parent = &client->dev;
1143         indio_dev->channels = mma9553_channels;
1144         indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1145         indio_dev->name = name;
1146         indio_dev->modes = INDIO_DIRECT_MODE;
1147         indio_dev->info = &mma9553_info;
1148
1149         if (client->irq < 0)
1150                 client->irq = mma9553_gpio_probe(client);
1151
1152         if (client->irq > 0) {
1153                 ret = devm_request_threaded_irq(&client->dev, client->irq,
1154                                                 mma9553_irq_handler,
1155                                                 mma9553_event_handler,
1156                                                 IRQF_TRIGGER_RISING,
1157                                                 MMA9553_IRQ_NAME, indio_dev);
1158                 if (ret < 0) {
1159                         dev_err(&client->dev, "request irq %d failed\n",
1160                                 client->irq);
1161                         goto out_poweroff;
1162                 }
1163         }
1164
1165         ret = iio_device_register(indio_dev);
1166         if (ret < 0) {
1167                 dev_err(&client->dev, "unable to register iio device\n");
1168                 goto out_poweroff;
1169         }
1170
1171         ret = pm_runtime_set_active(&client->dev);
1172         if (ret < 0)
1173                 goto out_iio_unregister;
1174
1175         pm_runtime_enable(&client->dev);
1176         pm_runtime_set_autosuspend_delay(&client->dev,
1177                                          MMA9551_AUTO_SUSPEND_DELAY_MS);
1178         pm_runtime_use_autosuspend(&client->dev);
1179
1180         dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1181
1182         return 0;
1183
1184 out_iio_unregister:
1185         iio_device_unregister(indio_dev);
1186 out_poweroff:
1187         mma9551_set_device_state(client, false);
1188         return ret;
1189 }
1190
1191 static int mma9553_remove(struct i2c_client *client)
1192 {
1193         struct iio_dev *indio_dev = i2c_get_clientdata(client);
1194         struct mma9553_data *data = iio_priv(indio_dev);
1195
1196         pm_runtime_disable(&client->dev);
1197         pm_runtime_set_suspended(&client->dev);
1198         pm_runtime_put_noidle(&client->dev);
1199
1200         iio_device_unregister(indio_dev);
1201         mutex_lock(&data->mutex);
1202         mma9551_set_device_state(data->client, false);
1203         mutex_unlock(&data->mutex);
1204
1205         return 0;
1206 }
1207
1208 #ifdef CONFIG_PM
1209 static int mma9553_runtime_suspend(struct device *dev)
1210 {
1211         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1212         struct mma9553_data *data = iio_priv(indio_dev);
1213         int ret;
1214
1215         mutex_lock(&data->mutex);
1216         ret = mma9551_set_device_state(data->client, false);
1217         mutex_unlock(&data->mutex);
1218         if (ret < 0) {
1219                 dev_err(&data->client->dev, "powering off device failed\n");
1220                 return -EAGAIN;
1221         }
1222
1223         return 0;
1224 }
1225
1226 static int mma9553_runtime_resume(struct device *dev)
1227 {
1228         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1229         struct mma9553_data *data = iio_priv(indio_dev);
1230         int ret;
1231
1232         ret = mma9551_set_device_state(data->client, true);
1233         if (ret < 0)
1234                 return ret;
1235
1236         mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1237
1238         return 0;
1239 }
1240 #endif
1241
1242 #ifdef CONFIG_PM_SLEEP
1243 static int mma9553_suspend(struct device *dev)
1244 {
1245         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1246         struct mma9553_data *data = iio_priv(indio_dev);
1247         int ret;
1248
1249         mutex_lock(&data->mutex);
1250         ret = mma9551_set_device_state(data->client, false);
1251         mutex_unlock(&data->mutex);
1252
1253         return ret;
1254 }
1255
1256 static int mma9553_resume(struct device *dev)
1257 {
1258         struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1259         struct mma9553_data *data = iio_priv(indio_dev);
1260         int ret;
1261
1262         mutex_lock(&data->mutex);
1263         ret = mma9551_set_device_state(data->client, true);
1264         mutex_unlock(&data->mutex);
1265
1266         return ret;
1267 }
1268 #endif
1269
1270 static const struct dev_pm_ops mma9553_pm_ops = {
1271         SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1272         SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
1273                            mma9553_runtime_resume, NULL)
1274 };
1275
1276 static const struct acpi_device_id mma9553_acpi_match[] = {
1277         {"MMA9553", 0},
1278         {},
1279 };
1280
1281 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1282
1283 static const struct i2c_device_id mma9553_id[] = {
1284         {"mma9553", 0},
1285         {},
1286 };
1287
1288 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1289
1290 static struct i2c_driver mma9553_driver = {
1291         .driver = {
1292                    .name = MMA9553_DRV_NAME,
1293                    .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
1294                    .pm = &mma9553_pm_ops,
1295                    },
1296         .probe = mma9553_probe,
1297         .remove = mma9553_remove,
1298         .id_table = mma9553_id,
1299 };
1300
1301 module_i2c_driver(mma9553_driver);
1302
1303 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1304 MODULE_LICENSE("GPL v2");
1305 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");