drivers/input/misc/bma150.c

   1 /*
   2  * Copyright (c) 2011 Bosch Sensortec GmbH
   3  * Copyright (c) 2011 Unixphere
   4  *
   5  * This driver adds support for Bosch Sensortec's digital acceleration
   6  * sensors BMA150 and SMB380.
   7  * The SMB380 is fully compatible with BMA150 and only differs in packaging.
   8  *
   9  * The datasheet for the BMA150 chip can be found here:
  10  * http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/i2c.h>
  29 #include <linux/input.h>
  30 #include <linux/input-polldev.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/delay.h>
  33 #include <linux/slab.h>
  34 #include <linux/pm.h>
  35 #include <linux/pm_runtime.h>
  36 #include <linux/bma150.h>
  37
  38 #define ABSMAX_ACC_VAL          0x01FF
  39 #define ABSMIN_ACC_VAL          -(ABSMAX_ACC_VAL)
  40
  41 /* Each axis is represented by a 2-byte data word */
  42 #define BMA150_XYZ_DATA_SIZE    6
  43
  44 /* Input poll interval in milliseconds */
  45 #define BMA150_POLL_INTERVAL    10
  46 #define BMA150_POLL_MAX         200
  47 #define BMA150_POLL_MIN         0
  48
  49 #define BMA150_BW_25HZ          0
  50 #define BMA150_BW_50HZ          1
  51 #define BMA150_BW_100HZ         2
  52 #define BMA150_BW_190HZ         3
  53 #define BMA150_BW_375HZ         4
  54 #define BMA150_BW_750HZ         5
  55 #define BMA150_BW_1500HZ        6
  56
  57 #define BMA150_RANGE_2G         0
  58 #define BMA150_RANGE_4G         1
  59 #define BMA150_RANGE_8G         2
  60
  61 #define BMA150_MODE_NORMAL      0
  62 #define BMA150_MODE_SLEEP       2
  63 #define BMA150_MODE_WAKE_UP     3
  64
  65 /* Data register addresses */
  66 #define BMA150_DATA_0_REG       0x00
  67 #define BMA150_DATA_1_REG       0x01
  68 #define BMA150_DATA_2_REG       0x02
  69
  70 /* Control register addresses */
  71 #define BMA150_CTRL_0_REG       0x0A
  72 #define BMA150_CTRL_1_REG       0x0B
  73 #define BMA150_CTRL_2_REG       0x14
  74 #define BMA150_CTRL_3_REG       0x15
  75
  76 /* Configuration/Setting register addresses */
  77 #define BMA150_CFG_0_REG        0x0C
  78 #define BMA150_CFG_1_REG        0x0D
  79 #define BMA150_CFG_2_REG        0x0E
  80 #define BMA150_CFG_3_REG        0x0F
  81 #define BMA150_CFG_4_REG        0x10
  82 #define BMA150_CFG_5_REG        0x11
  83
  84 #define BMA150_CHIP_ID          2
  85 #define BMA150_CHIP_ID_REG      BMA150_DATA_0_REG
  86
  87 #define BMA150_ACC_X_LSB_REG    BMA150_DATA_2_REG
  88
  89 #define BMA150_SLEEP_POS        0
  90 #define BMA150_SLEEP_MSK        0x01
  91 #define BMA150_SLEEP_REG        BMA150_CTRL_0_REG
  92
  93 #define BMA150_BANDWIDTH_POS    0
  94 #define BMA150_BANDWIDTH_MSK    0x07
  95 #define BMA150_BANDWIDTH_REG    BMA150_CTRL_2_REG
  96
  97 #define BMA150_RANGE_POS        3
  98 #define BMA150_RANGE_MSK        0x18
  99 #define BMA150_RANGE_REG        BMA150_CTRL_2_REG
 100
 101 #define BMA150_WAKE_UP_POS      0
 102 #define BMA150_WAKE_UP_MSK      0x01
 103 #define BMA150_WAKE_UP_REG      BMA150_CTRL_3_REG
 104
 105 #define BMA150_SW_RES_POS       1
 106 #define BMA150_SW_RES_MSK       0x02
 107 #define BMA150_SW_RES_REG       BMA150_CTRL_0_REG
 108
 109 /* Any-motion interrupt register fields */
 110 #define BMA150_ANY_MOTION_EN_POS        6
 111 #define BMA150_ANY_MOTION_EN_MSK        0x40
 112 #define BMA150_ANY_MOTION_EN_REG        BMA150_CTRL_1_REG
 113
 114 #define BMA150_ANY_MOTION_DUR_POS       6
 115 #define BMA150_ANY_MOTION_DUR_MSK       0xC0
 116 #define BMA150_ANY_MOTION_DUR_REG       BMA150_CFG_5_REG
 117
 118 #define BMA150_ANY_MOTION_THRES_REG     BMA150_CFG_4_REG
 119
 120 /* Advanced interrupt register fields */
 121 #define BMA150_ADV_INT_EN_POS           6
 122 #define BMA150_ADV_INT_EN_MSK           0x40
 123 #define BMA150_ADV_INT_EN_REG           BMA150_CTRL_3_REG
 124
 125 /* High-G interrupt register fields */
 126 #define BMA150_HIGH_G_EN_POS            1
 127 #define BMA150_HIGH_G_EN_MSK            0x02
 128 #define BMA150_HIGH_G_EN_REG            BMA150_CTRL_1_REG
 129
 130 #define BMA150_HIGH_G_HYST_POS          3
 131 #define BMA150_HIGH_G_HYST_MSK          0x38
 132 #define BMA150_HIGH_G_HYST_REG          BMA150_CFG_5_REG
 133
 134 #define BMA150_HIGH_G_DUR_REG           BMA150_CFG_3_REG
 135 #define BMA150_HIGH_G_THRES_REG         BMA150_CFG_2_REG
 136
 137 /* Low-G interrupt register fields */
 138 #define BMA150_LOW_G_EN_POS             0
 139 #define BMA150_LOW_G_EN_MSK             0x01
 140 #define BMA150_LOW_G_EN_REG             BMA150_CTRL_1_REG
 141
 142 #define BMA150_LOW_G_HYST_POS           0
 143 #define BMA150_LOW_G_HYST_MSK           0x07
 144 #define BMA150_LOW_G_HYST_REG           BMA150_CFG_5_REG
 145
 146 #define BMA150_LOW_G_DUR_REG            BMA150_CFG_1_REG
 147 #define BMA150_LOW_G_THRES_REG          BMA150_CFG_0_REG
 148
 149 struct bma150_data {
 150         struct i2c_client *client;
 151         struct input_polled_dev *input_polled;
 152         struct input_dev *input;
 153         u8 mode;
 154 };
 155
 156 /*
 157  * The settings for the given range, bandwidth and interrupt features
 158  * are stated and verified by Bosch Sensortec where they are configured
 159  * to provide a generic sensitivity performance.
 160  */
 161 static struct bma150_cfg default_cfg __devinitdata = {
 162         .any_motion_int = 1,
 163         .hg_int = 1,
 164         .lg_int = 1,
 165         .any_motion_dur = 0,
 166         .any_motion_thres = 0,
 167         .hg_hyst = 0,
 168         .hg_dur = 150,
 169         .hg_thres = 160,
 170         .lg_hyst = 0,
 171         .lg_dur = 150,
 172         .lg_thres = 20,
 173         .range = BMA150_RANGE_2G,
 174         .bandwidth = BMA150_BW_50HZ
 175 };
 176
 177 static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
 178 {
 179         s32 ret;
 180
 181         /* As per specification, disable irq in between register writes */
 182         if (client->irq)
 183                 disable_irq_nosync(client->irq);
 184
 185         ret = i2c_smbus_write_byte_data(client, reg, val);
 186
 187         if (client->irq)
 188                 enable_irq(client->irq);
 189
 190         return ret;
 191 }
 192
 193 static int bma150_set_reg_bits(struct i2c_client *client,
 194                                         int val, int shift, u8 mask, u8 reg)
 195 {
 196         int data;
 197
 198         data = i2c_smbus_read_byte_data(client, reg);
 199         if (data < 0)
 200                 return data;
 201
 202         data = (data & ~mask) | ((val << shift) & mask);
 203         return bma150_write_byte(client, reg, data);
 204 }
 205
 206 static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
 207 {
 208         int error;
 209
 210         error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
 211                                 BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
 212         if (error)
 213                 return error;
 214
 215         error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
 216                                 BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
 217         if (error)
 218                 return error;
 219
 220         if (mode == BMA150_MODE_NORMAL)
 221                 msleep(2);
 222
 223         bma150->mode = mode;
 224         return 0;
 225 }
 226
 227 static int __devinit bma150_soft_reset(struct bma150_data *bma150)
 228 {
 229         int error;
 230
 231         error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
 232                                 BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
 233         if (error)
 234                 return error;
 235
 236         msleep(2);
 237         return 0;
 238 }
 239
 240 static int __devinit bma150_set_range(struct bma150_data *bma150, u8 range)
 241 {
 242         return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
 243                                 BMA150_RANGE_MSK, BMA150_RANGE_REG);
 244 }
 245
 246 static int __devinit bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
 247 {
 248         return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
 249                                 BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
 250 }
 251
 252 static int __devinit bma150_set_low_g_interrupt(struct bma150_data *bma150,
 253                                         u8 enable, u8 hyst, u8 dur, u8 thres)
 254 {
 255         int error;
 256
 257         error = bma150_set_reg_bits(bma150->client, hyst,
 258                                 BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
 259                                 BMA150_LOW_G_HYST_REG);
 260         if (error)
 261                 return error;
 262
 263         error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
 264         if (error)
 265                 return error;
 266
 267         error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
 268         if (error)
 269                 return error;
 270
 271         return bma150_set_reg_bits(bma150->client, !!enable,
 272                                 BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
 273                                 BMA150_LOW_G_EN_REG);
 274 }
 275
 276 static int __devinit bma150_set_high_g_interrupt(struct bma150_data *bma150,
 277                                         u8 enable, u8 hyst, u8 dur, u8 thres)
 278 {
 279         int error;
 280
 281         error = bma150_set_reg_bits(bma150->client, hyst,
 282                                 BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
 283                                 BMA150_HIGH_G_HYST_REG);
 284         if (error)
 285                 return error;
 286
 287         error = bma150_write_byte(bma150->client,
 288                                 BMA150_HIGH_G_DUR_REG, dur);
 289         if (error)
 290                 return error;
 291
 292         error = bma150_write_byte(bma150->client,
 293                                 BMA150_HIGH_G_THRES_REG, thres);
 294         if (error)
 295                 return error;
 296
 297         return bma150_set_reg_bits(bma150->client, !!enable,
 298                                 BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
 299                                 BMA150_HIGH_G_EN_REG);
 300 }
 301
 302
 303 static int __devinit bma150_set_any_motion_interrupt(struct bma150_data *bma150,
 304                                                 u8 enable, u8 dur, u8 thres)
 305 {
 306         int error;
 307
 308         error = bma150_set_reg_bits(bma150->client, dur,
 309                                 BMA150_ANY_MOTION_DUR_POS,
 310                                 BMA150_ANY_MOTION_DUR_MSK,
 311                                 BMA150_ANY_MOTION_DUR_REG);
 312         if (error)
 313                 return error;
 314
 315         error = bma150_write_byte(bma150->client,
 316                                 BMA150_ANY_MOTION_THRES_REG, thres);
 317         if (error)
 318                 return error;
 319
 320         error = bma150_set_reg_bits(bma150->client, !!enable,
 321                                 BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
 322                                 BMA150_ADV_INT_EN_REG);
 323         if (error)
 324                 return error;
 325
 326         return bma150_set_reg_bits(bma150->client, !!enable,
 327                                 BMA150_ANY_MOTION_EN_POS,
 328                                 BMA150_ANY_MOTION_EN_MSK,
 329                                 BMA150_ANY_MOTION_EN_REG);
 330 }
 331
 332 static void bma150_report_xyz(struct bma150_data *bma150)
 333 {
 334         u8 data[BMA150_XYZ_DATA_SIZE];
 335         s16 x, y, z;
 336         s32 ret;
 337
 338         ret = i2c_smbus_read_i2c_block_data(bma150->client,
 339                         BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
 340         if (ret != BMA150_XYZ_DATA_SIZE)
 341                 return;
 342
 343         x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
 344         y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
 345         z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
 346
 347         /* sign extension */
 348         x = (s16) (x << 6) >> 6;
 349         y = (s16) (y << 6) >> 6;
 350         z = (s16) (z << 6) >> 6;
 351
 352         input_report_abs(bma150->input, ABS_X, x);
 353         input_report_abs(bma150->input, ABS_Y, y);
 354         input_report_abs(bma150->input, ABS_Z, z);
 355         input_sync(bma150->input);
 356 }
 357
 358 static irqreturn_t bma150_irq_thread(int irq, void *dev)
 359 {
 360         bma150_report_xyz(dev);
 361
 362         return IRQ_HANDLED;
 363 }
 364
 365 static void bma150_poll(struct input_polled_dev *dev)
 366 {
 367         bma150_report_xyz(dev->private);
 368 }
 369
 370 static int bma150_open(struct bma150_data *bma150)
 371 {
 372         int error;
 373
 374         error = pm_runtime_get_sync(&bma150->client->dev);
 375         if (error && error != -ENOSYS)
 376                 return error;
 377
 378         /*
 379          * See if runtime PM woke up the device. If runtime PM
 380          * is disabled we need to do it ourselves.
 381          */
 382         if (bma150->mode != BMA150_MODE_NORMAL) {
 383                 error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
 384                 if (error)
 385                         return error;
 386         }
 387
 388         return 0;
 389 }
 390
 391 static void bma150_close(struct bma150_data *bma150)
 392 {
 393         pm_runtime_put_sync(&bma150->client->dev);
 394
 395         if (bma150->mode != BMA150_MODE_SLEEP)
 396                 bma150_set_mode(bma150, BMA150_MODE_SLEEP);
 397 }
 398
 399 static int bma150_irq_open(struct input_dev *input)
 400 {
 401         struct bma150_data *bma150 = input_get_drvdata(input);
 402
 403         return bma150_open(bma150);
 404 }
 405
 406 static void bma150_irq_close(struct input_dev *input)
 407 {
 408         struct bma150_data *bma150 = input_get_drvdata(input);
 409
 410         bma150_close(bma150);
 411 }
 412
 413 static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
 414 {
 415         struct bma150_data *bma150 = ipoll_dev->private;
 416
 417         bma150_open(bma150);
 418 }
 419
 420 static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
 421 {
 422         struct bma150_data *bma150 = ipoll_dev->private;
 423
 424         bma150_close(bma150);
 425 }
 426
 427 static int __devinit bma150_initialize(struct bma150_data *bma150,
 428                                        const struct bma150_cfg *cfg)
 429 {
 430         int error;
 431
 432         error = bma150_soft_reset(bma150);
 433         if (error)
 434                 return error;
 435
 436         error = bma150_set_bandwidth(bma150, cfg->bandwidth);
 437         if (error)
 438                 return error;
 439
 440         error = bma150_set_range(bma150, cfg->range);
 441         if (error)
 442                 return error;
 443
 444         if (bma150->client->irq) {
 445                 error = bma150_set_any_motion_interrupt(bma150,
 446                                         cfg->any_motion_int,
 447                                         cfg->any_motion_dur,
 448                                         cfg->any_motion_thres);
 449                 if (error)
 450                         return error;
 451
 452                 error = bma150_set_high_g_interrupt(bma150,
 453                                         cfg->hg_int, cfg->hg_hyst,
 454                                         cfg->hg_dur, cfg->hg_thres);
 455                 if (error)
 456                         return error;
 457
 458                 error = bma150_set_low_g_interrupt(bma150,
 459                                         cfg->lg_int, cfg->lg_hyst,
 460                                         cfg->lg_dur, cfg->lg_thres);
 461                 if (error)
 462                         return error;
 463         }
 464
 465         return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
 466 }
 467
 468 static void __devinit bma150_init_input_device(struct bma150_data *bma150,
 469                                                 struct input_dev *idev)
 470 {
 471         idev->name = BMA150_DRIVER;
 472         idev->phys = BMA150_DRIVER "/input0";
 473         idev->id.bustype = BUS_I2C;
 474         idev->dev.parent = &bma150->client->dev;
 475
 476         idev->evbit[0] = BIT_MASK(EV_ABS);
 477         input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
 478         input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
 479         input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
 480 }
 481
 482 static int __devinit bma150_register_input_device(struct bma150_data *bma150)
 483 {
 484         struct input_dev *idev;
 485         int error;
 486
 487         idev = input_allocate_device();
 488         if (!idev)
 489                 return -ENOMEM;
 490
 491         bma150_init_input_device(bma150, idev);
 492
 493         idev->open = bma150_irq_open;
 494         idev->close = bma150_irq_close;
 495         input_set_drvdata(idev, bma150);
 496
 497         error = input_register_device(idev);
 498         if (error) {
 499                 input_free_device(idev);
 500                 return error;
 501         }
 502
 503         bma150->input = idev;
 504         return 0;
 505 }
 506
 507 static int __devinit bma150_register_polled_device(struct bma150_data *bma150)
 508 {
 509         struct input_polled_dev *ipoll_dev;
 510         int error;
 511
 512         ipoll_dev = input_allocate_polled_device();
 513         if (!ipoll_dev)
 514                 return -ENOMEM;
 515
 516         ipoll_dev->private = bma150;
 517         ipoll_dev->open = bma150_poll_open;
 518         ipoll_dev->close = bma150_poll_close;
 519         ipoll_dev->poll = bma150_poll;
 520         ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
 521         ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
 522         ipoll_dev->poll_interval_max = BMA150_POLL_MAX;
 523
 524         bma150_init_input_device(bma150, ipoll_dev->input);
 525
 526         error = input_register_polled_device(ipoll_dev);
 527         if (error) {
 528                 input_free_polled_device(ipoll_dev);
 529                 return error;
 530         }
 531
 532         bma150->input_polled = ipoll_dev;
 533         bma150->input = ipoll_dev->input;
 534
 535         return 0;
 536 }
 537
 538 static int __devinit bma150_probe(struct i2c_client *client,
 539                                   const struct i2c_device_id *id)
 540 {
 541         const struct bma150_platform_data *pdata = client->dev.platform_data;
 542         const struct bma150_cfg *cfg;
 543         struct bma150_data *bma150;
 544         int chip_id;
 545         int error;
 546
 547         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 548                 dev_err(&client->dev, "i2c_check_functionality error\n");
 549                 return -EIO;
 550         }
 551
 552         chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
 553         if (chip_id != BMA150_CHIP_ID) {
 554                 dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
 555                 return -EINVAL;
 556         }
 557
 558         bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
 559         if (!bma150)
 560                 return -ENOMEM;
 561
 562         bma150->client = client;
 563
 564         if (pdata) {
 565                 if (pdata->irq_gpio_cfg) {
 566                         error = pdata->irq_gpio_cfg();
 567                         if (error) {
 568                                 dev_err(&client->dev,
 569                                         "IRQ GPIO conf. error %d, error %d\n",
 570                                         client->irq, error);
 571                                 goto err_free_mem;
 572                         }
 573                 }
 574                 cfg = &pdata->cfg;
 575         } else {
 576                 cfg = &default_cfg;
 577         }
 578
 579         error = bma150_initialize(bma150, cfg);
 580         if (error)
 581                 goto err_free_mem;
 582
 583         if (client->irq > 0) {
 584                 error = bma150_register_input_device(bma150);
 585                 if (error)
 586                         goto err_free_mem;
 587
 588                 error = request_threaded_irq(client->irq,
 589                                         NULL, bma150_irq_thread,
 590                                         IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 591                                         BMA150_DRIVER, bma150);
 592                 if (error) {
 593                         dev_err(&client->dev,
 594                                 "irq request failed %d, error %d\n",
 595                                 client->irq, error);
 596                         input_unregister_device(bma150->input);
 597                         goto err_free_mem;
 598                 }
 599         } else {
 600                 error = bma150_register_polled_device(bma150);
 601                 if (error)
 602                         goto err_free_mem;
 603         }
 604
 605         i2c_set_clientdata(client, bma150);
 606
 607         pm_runtime_enable(&client->dev);
 608
 609         return 0;
 610
 611 err_free_mem:
 612         kfree(bma150);
 613         return error;
 614 }
 615
 616 static int __devexit bma150_remove(struct i2c_client *client)
 617 {
 618         struct bma150_data *bma150 = i2c_get_clientdata(client);
 619
 620         pm_runtime_disable(&client->dev);
 621
 622         if (client->irq > 0) {
 623                 free_irq(client->irq, bma150);
 624                 input_unregister_device(bma150->input);
 625         } else {
 626                 input_unregister_polled_device(bma150->input_polled);
 627                 input_free_polled_device(bma150->input_polled);
 628         }
 629
 630         kfree(bma150);
 631
 632         return 0;
 633 }
 634
 635 #ifdef CONFIG_PM
 636 static int bma150_suspend(struct device *dev)
 637 {
 638         struct i2c_client *client = to_i2c_client(dev);
 639         struct bma150_data *bma150 = i2c_get_clientdata(client);
 640
 641         return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
 642 }
 643
 644 static int bma150_resume(struct device *dev)
 645 {
 646         struct i2c_client *client = to_i2c_client(dev);
 647         struct bma150_data *bma150 = i2c_get_clientdata(client);
 648
 649         return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
 650 }
 651 #endif
 652
 653 static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
 654
 655 static const struct i2c_device_id bma150_id[] = {
 656         { "bma150", 0 },
 657         { "smb380", 0 },
 658         { "bma023", 0 },
 659         { }
 660 };
 661
 662 MODULE_DEVICE_TABLE(i2c, bma150_id);
 663
 664 static struct i2c_driver bma150_driver = {
 665         .driver = {
 666                 .owner  = THIS_MODULE,
 667                 .name   = BMA150_DRIVER,
 668                 .pm     = &bma150_pm,
 669         },
 670         .class          = I2C_CLASS_HWMON,
 671         .id_table       = bma150_id,
 672         .probe          = bma150_probe,
 673         .remove         = __devexit_p(bma150_remove),
 674 };
 675
 676 static int __init BMA150_init(void)
 677 {
 678         return i2c_add_driver(&bma150_driver);
 679 }
 680
 681 static void __exit BMA150_exit(void)
 682 {
 683         i2c_del_driver(&bma150_driver);
 684 }
 685
 686 MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
 687 MODULE_DESCRIPTION("BMA150 driver");
 688 MODULE_LICENSE("GPL");
 689
 690 module_init(BMA150_init);
 691 module_exit(BMA150_exit);