1 /* 2 * mlx90614.c - Support for Melexis MLX90614 contactless IR temperature sensor 3 * 4 * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net> 5 * Copyright (c) 2015 Essensium NV 6 * Copyright (c) 2015 Melexis 7 * 8 * This file is subject to the terms and conditions of version 2 of 9 * the GNU General Public License. See the file COPYING in the main 10 * directory of this archive for more details. 11 * 12 * Driver for the Melexis MLX90614 I2C 16-bit IR thermopile sensor 13 * 14 * (7-bit I2C slave address 0x5a, 100KHz bus speed only!) 15 * 16 * To wake up from sleep mode, the SDA line must be held low while SCL is high 17 * for at least 33ms. This is achieved with an extra GPIO that can be connected 18 * directly to the SDA line. In normal operation, the GPIO is set as input and 19 * will not interfere in I2C communication. While the GPIO is driven low, the 20 * i2c adapter is locked since it cannot be used by other clients. The SCL line 21 * always has a pull-up so we do not need an extra GPIO to drive it high. If 22 * the "wakeup" GPIO is not given, power management will be disabled. 23 * 24 */ 25 26 #include <linux/err.h> 27 #include <linux/i2c.h> 28 #include <linux/module.h> 29 #include <linux/delay.h> 30 #include <linux/jiffies.h> 31 #include <linux/gpio/consumer.h> 32 #include <linux/pm_runtime.h> 33 34 #include <linux/iio/iio.h> 35 #include <linux/iio/sysfs.h> 36 37 #define MLX90614_OP_RAM 0x00 38 #define MLX90614_OP_EEPROM 0x20 39 #define MLX90614_OP_SLEEP 0xff 40 41 /* RAM offsets with 16-bit data, MSB first */ 42 #define MLX90614_RAW1 (MLX90614_OP_RAM | 0x04) /* raw data IR channel 1 */ 43 #define MLX90614_RAW2 (MLX90614_OP_RAM | 0x05) /* raw data IR channel 2 */ 44 #define MLX90614_TA (MLX90614_OP_RAM | 0x06) /* ambient temperature */ 45 #define MLX90614_TOBJ1 (MLX90614_OP_RAM | 0x07) /* object 1 temperature */ 46 #define MLX90614_TOBJ2 (MLX90614_OP_RAM | 0x08) /* object 2 temperature */ 47 48 /* EEPROM offsets with 16-bit data, MSB first */ 49 #define MLX90614_EMISSIVITY (MLX90614_OP_EEPROM | 0x04) /* emissivity correction coefficient */ 50 #define MLX90614_CONFIG (MLX90614_OP_EEPROM | 0x05) /* configuration register */ 51 52 /* Control bits in configuration register */ 53 #define MLX90614_CONFIG_IIR_SHIFT 0 /* IIR coefficient */ 54 #define MLX90614_CONFIG_IIR_MASK (0x7 << MLX90614_CONFIG_IIR_SHIFT) 55 #define MLX90614_CONFIG_DUAL_SHIFT 6 /* single (0) or dual (1) IR sensor */ 56 #define MLX90614_CONFIG_DUAL_MASK (1 << MLX90614_CONFIG_DUAL_SHIFT) 57 #define MLX90614_CONFIG_FIR_SHIFT 8 /* FIR coefficient */ 58 #define MLX90614_CONFIG_FIR_MASK (0x7 << MLX90614_CONFIG_FIR_SHIFT) 59 #define MLX90614_CONFIG_GAIN_SHIFT 11 /* gain */ 60 #define MLX90614_CONFIG_GAIN_MASK (0x7 << MLX90614_CONFIG_GAIN_SHIFT) 61 62 /* Timings (in ms) */ 63 #define MLX90614_TIMING_EEPROM 20 /* time for EEPROM write/erase to complete */ 64 #define MLX90614_TIMING_WAKEUP 34 /* time to hold SDA low for wake-up */ 65 #define MLX90614_TIMING_STARTUP 250 /* time before first data after wake-up */ 66 67 #define MLX90614_AUTOSLEEP_DELAY 5000 /* default autosleep delay */ 68 69 /* Magic constants */ 70 #define MLX90614_CONST_OFFSET_DEC -13657 /* decimal part of the Kelvin offset */ 71 #define MLX90614_CONST_OFFSET_REM 500000 /* remainder of offset (273.15*50) */ 72 #define MLX90614_CONST_SCALE 20 /* Scale in milliKelvin (0.02 * 1000) */ 73 #define MLX90614_CONST_RAW_EMISSIVITY_MAX 65535 /* max value for emissivity */ 74 #define MLX90614_CONST_EMISSIVITY_RESOLUTION 15259 /* 1/65535 ~ 0.000015259 */ 75 #define MLX90614_CONST_FIR 0x7 /* Fixed value for FIR part of low pass filter */ 76 77 struct mlx90614_data { 78 struct i2c_client *client; 79 struct mutex lock; /* for EEPROM access only */ 80 struct gpio_desc *wakeup_gpio; /* NULL to disable sleep/wake-up */ 81 unsigned long ready_timestamp; /* in jiffies */ 82 }; 83 84 /* Bandwidth values for IIR filtering */ 85 static const int mlx90614_iir_values[] = {77, 31, 20, 15, 723, 153, 110, 86}; 86 static IIO_CONST_ATTR(in_temp_object_filter_low_pass_3db_frequency_available, 87 "0.15 0.20 0.31 0.77 0.86 1.10 1.53 7.23"); 88 89 static struct attribute *mlx90614_attributes[] = { 90 &iio_const_attr_in_temp_object_filter_low_pass_3db_frequency_available.dev_attr.attr, 91 NULL, 92 }; 93 94 static const struct attribute_group mlx90614_attr_group = { 95 .attrs = mlx90614_attributes, 96 }; 97 98 /* 99 * Erase an address and write word. 100 * The mutex must be locked before calling. 101 */ 102 static s32 mlx90614_write_word(const struct i2c_client *client, u8 command, 103 u16 value) 104 { 105 /* 106 * Note: The mlx90614 requires a PEC on writing but does not send us a 107 * valid PEC on reading. Hence, we cannot set I2C_CLIENT_PEC in 108 * i2c_client.flags. As a workaround, we use i2c_smbus_xfer here. 109 */ 110 union i2c_smbus_data data; 111 s32 ret; 112 113 dev_dbg(&client->dev, "Writing 0x%x to address 0x%x", value, command); 114 115 data.word = 0x0000; /* erase command */ 116 ret = i2c_smbus_xfer(client->adapter, client->addr, 117 client->flags | I2C_CLIENT_PEC, 118 I2C_SMBUS_WRITE, command, 119 I2C_SMBUS_WORD_DATA, &data); 120 if (ret < 0) 121 return ret; 122 123 msleep(MLX90614_TIMING_EEPROM); 124 125 data.word = value; /* actual write */ 126 ret = i2c_smbus_xfer(client->adapter, client->addr, 127 client->flags | I2C_CLIENT_PEC, 128 I2C_SMBUS_WRITE, command, 129 I2C_SMBUS_WORD_DATA, &data); 130 131 msleep(MLX90614_TIMING_EEPROM); 132 133 return ret; 134 } 135 136 /* 137 * Find the IIR value inside mlx90614_iir_values array and return its position 138 * which is equivalent to the bit value in sensor register 139 */ 140 static inline s32 mlx90614_iir_search(const struct i2c_client *client, 141 int value) 142 { 143 int i; 144 s32 ret; 145 146 for (i = 0; i < ARRAY_SIZE(mlx90614_iir_values); ++i) { 147 if (value == mlx90614_iir_values[i]) 148 break; 149 } 150 151 if (i == ARRAY_SIZE(mlx90614_iir_values)) 152 return -EINVAL; 153 154 /* 155 * CONFIG register values must not be changed so 156 * we must read them before we actually write 157 * changes 158 */ 159 ret = i2c_smbus_read_word_data(client, MLX90614_CONFIG); 160 if (ret < 0) 161 return ret; 162 163 ret &= ~MLX90614_CONFIG_FIR_MASK; 164 ret |= MLX90614_CONST_FIR << MLX90614_CONFIG_FIR_SHIFT; 165 ret &= ~MLX90614_CONFIG_IIR_MASK; 166 ret |= i << MLX90614_CONFIG_IIR_SHIFT; 167 168 /* Write changed values */ 169 ret = mlx90614_write_word(client, MLX90614_CONFIG, ret); 170 return ret; 171 } 172 173 #ifdef CONFIG_PM 174 /* 175 * If @startup is true, make sure MLX90614_TIMING_STARTUP ms have elapsed since 176 * the last wake-up. This is normally only needed to get a valid temperature 177 * reading. EEPROM access does not need such delay. 178 * Return 0 on success, <0 on error. 179 */ 180 static int mlx90614_power_get(struct mlx90614_data *data, bool startup) 181 { 182 unsigned long now; 183 184 if (!data->wakeup_gpio) 185 return 0; 186 187 pm_runtime_get_sync(&data->client->dev); 188 189 if (startup) { 190 now = jiffies; 191 if (time_before(now, data->ready_timestamp) && 192 msleep_interruptible(jiffies_to_msecs( 193 data->ready_timestamp - now)) != 0) { 194 pm_runtime_put_autosuspend(&data->client->dev); 195 return -EINTR; 196 } 197 } 198 199 return 0; 200 } 201 202 static void mlx90614_power_put(struct mlx90614_data *data) 203 { 204 if (!data->wakeup_gpio) 205 return; 206 207 pm_runtime_mark_last_busy(&data->client->dev); 208 pm_runtime_put_autosuspend(&data->client->dev); 209 } 210 #else 211 static inline int mlx90614_power_get(struct mlx90614_data *data, bool startup) 212 { 213 return 0; 214 } 215 216 static inline void mlx90614_power_put(struct mlx90614_data *data) 217 { 218 } 219 #endif 220 221 static int mlx90614_read_raw(struct iio_dev *indio_dev, 222 struct iio_chan_spec const *channel, int *val, 223 int *val2, long mask) 224 { 225 struct mlx90614_data *data = iio_priv(indio_dev); 226 u8 cmd; 227 s32 ret; 228 229 switch (mask) { 230 case IIO_CHAN_INFO_RAW: /* 0.02K / LSB */ 231 switch (channel->channel2) { 232 case IIO_MOD_TEMP_AMBIENT: 233 cmd = MLX90614_TA; 234 break; 235 case IIO_MOD_TEMP_OBJECT: 236 switch (channel->channel) { 237 case 0: 238 cmd = MLX90614_TOBJ1; 239 break; 240 case 1: 241 cmd = MLX90614_TOBJ2; 242 break; 243 default: 244 return -EINVAL; 245 } 246 break; 247 default: 248 return -EINVAL; 249 } 250 251 ret = mlx90614_power_get(data, true); 252 if (ret < 0) 253 return ret; 254 ret = i2c_smbus_read_word_data(data->client, cmd); 255 mlx90614_power_put(data); 256 257 if (ret < 0) 258 return ret; 259 260 /* MSB is an error flag */ 261 if (ret & 0x8000) 262 return -EIO; 263 264 *val = ret; 265 return IIO_VAL_INT; 266 case IIO_CHAN_INFO_OFFSET: 267 *val = MLX90614_CONST_OFFSET_DEC; 268 *val2 = MLX90614_CONST_OFFSET_REM; 269 return IIO_VAL_INT_PLUS_MICRO; 270 case IIO_CHAN_INFO_SCALE: 271 *val = MLX90614_CONST_SCALE; 272 return IIO_VAL_INT; 273 case IIO_CHAN_INFO_CALIBEMISSIVITY: /* 1/65535 / LSB */ 274 mlx90614_power_get(data, false); 275 mutex_lock(&data->lock); 276 ret = i2c_smbus_read_word_data(data->client, 277 MLX90614_EMISSIVITY); 278 mutex_unlock(&data->lock); 279 mlx90614_power_put(data); 280 281 if (ret < 0) 282 return ret; 283 284 if (ret == MLX90614_CONST_RAW_EMISSIVITY_MAX) { 285 *val = 1; 286 *val2 = 0; 287 } else { 288 *val = 0; 289 *val2 = ret * MLX90614_CONST_EMISSIVITY_RESOLUTION; 290 } 291 return IIO_VAL_INT_PLUS_NANO; 292 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: /* IIR setting with 293 FIR = 1024 */ 294 mlx90614_power_get(data, false); 295 mutex_lock(&data->lock); 296 ret = i2c_smbus_read_word_data(data->client, MLX90614_CONFIG); 297 mutex_unlock(&data->lock); 298 mlx90614_power_put(data); 299 300 if (ret < 0) 301 return ret; 302 303 *val = mlx90614_iir_values[ret & MLX90614_CONFIG_IIR_MASK] / 100; 304 *val2 = (mlx90614_iir_values[ret & MLX90614_CONFIG_IIR_MASK] % 100) * 305 10000; 306 return IIO_VAL_INT_PLUS_MICRO; 307 default: 308 return -EINVAL; 309 } 310 } 311 312 static int mlx90614_write_raw(struct iio_dev *indio_dev, 313 struct iio_chan_spec const *channel, int val, 314 int val2, long mask) 315 { 316 struct mlx90614_data *data = iio_priv(indio_dev); 317 s32 ret; 318 319 switch (mask) { 320 case IIO_CHAN_INFO_CALIBEMISSIVITY: /* 1/65535 / LSB */ 321 if (val < 0 || val2 < 0 || val > 1 || (val == 1 && val2 != 0)) 322 return -EINVAL; 323 val = val * MLX90614_CONST_RAW_EMISSIVITY_MAX + 324 val2 / MLX90614_CONST_EMISSIVITY_RESOLUTION; 325 326 mlx90614_power_get(data, false); 327 mutex_lock(&data->lock); 328 ret = mlx90614_write_word(data->client, MLX90614_EMISSIVITY, 329 val); 330 mutex_unlock(&data->lock); 331 mlx90614_power_put(data); 332 333 return ret; 334 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: /* IIR Filter setting */ 335 if (val < 0 || val2 < 0) 336 return -EINVAL; 337 338 mlx90614_power_get(data, false); 339 mutex_lock(&data->lock); 340 ret = mlx90614_iir_search(data->client, 341 val * 100 + val2 / 10000); 342 mutex_unlock(&data->lock); 343 mlx90614_power_put(data); 344 345 return ret; 346 default: 347 return -EINVAL; 348 } 349 } 350 351 static int mlx90614_write_raw_get_fmt(struct iio_dev *indio_dev, 352 struct iio_chan_spec const *channel, 353 long mask) 354 { 355 switch (mask) { 356 case IIO_CHAN_INFO_CALIBEMISSIVITY: 357 return IIO_VAL_INT_PLUS_NANO; 358 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: 359 return IIO_VAL_INT_PLUS_MICRO; 360 default: 361 return -EINVAL; 362 } 363 } 364 365 static const struct iio_chan_spec mlx90614_channels[] = { 366 { 367 .type = IIO_TEMP, 368 .modified = 1, 369 .channel2 = IIO_MOD_TEMP_AMBIENT, 370 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 371 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | 372 BIT(IIO_CHAN_INFO_SCALE), 373 }, 374 { 375 .type = IIO_TEMP, 376 .modified = 1, 377 .channel2 = IIO_MOD_TEMP_OBJECT, 378 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 379 BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | 380 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), 381 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | 382 BIT(IIO_CHAN_INFO_SCALE), 383 }, 384 { 385 .type = IIO_TEMP, 386 .indexed = 1, 387 .modified = 1, 388 .channel = 1, 389 .channel2 = IIO_MOD_TEMP_OBJECT, 390 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 391 BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | 392 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), 393 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) | 394 BIT(IIO_CHAN_INFO_SCALE), 395 }, 396 }; 397 398 static const struct iio_info mlx90614_info = { 399 .read_raw = mlx90614_read_raw, 400 .write_raw = mlx90614_write_raw, 401 .write_raw_get_fmt = mlx90614_write_raw_get_fmt, 402 .attrs = &mlx90614_attr_group, 403 .driver_module = THIS_MODULE, 404 }; 405 406 #ifdef CONFIG_PM 407 static int mlx90614_sleep(struct mlx90614_data *data) 408 { 409 s32 ret; 410 411 if (!data->wakeup_gpio) { 412 dev_dbg(&data->client->dev, "Sleep disabled"); 413 return -ENOSYS; 414 } 415 416 dev_dbg(&data->client->dev, "Requesting sleep"); 417 418 mutex_lock(&data->lock); 419 ret = i2c_smbus_xfer(data->client->adapter, data->client->addr, 420 data->client->flags | I2C_CLIENT_PEC, 421 I2C_SMBUS_WRITE, MLX90614_OP_SLEEP, 422 I2C_SMBUS_BYTE, NULL); 423 mutex_unlock(&data->lock); 424 425 return ret; 426 } 427 428 static int mlx90614_wakeup(struct mlx90614_data *data) 429 { 430 if (!data->wakeup_gpio) { 431 dev_dbg(&data->client->dev, "Wake-up disabled"); 432 return -ENOSYS; 433 } 434 435 dev_dbg(&data->client->dev, "Requesting wake-up"); 436 437 i2c_lock_adapter(data->client->adapter); 438 gpiod_direction_output(data->wakeup_gpio, 0); 439 msleep(MLX90614_TIMING_WAKEUP); 440 gpiod_direction_input(data->wakeup_gpio); 441 i2c_unlock_adapter(data->client->adapter); 442 443 data->ready_timestamp = jiffies + 444 msecs_to_jiffies(MLX90614_TIMING_STARTUP); 445 446 /* 447 * Quirk: the i2c controller may get confused right after the 448 * wake-up signal has been sent. As a workaround, do a dummy read. 449 * If the read fails, the controller will probably be reset so that 450 * further reads will work. 451 */ 452 i2c_smbus_read_word_data(data->client, MLX90614_CONFIG); 453 454 return 0; 455 } 456 457 /* Return wake-up GPIO or NULL if sleep functionality should be disabled. */ 458 static struct gpio_desc *mlx90614_probe_wakeup(struct i2c_client *client) 459 { 460 struct gpio_desc *gpio; 461 462 if (!i2c_check_functionality(client->adapter, 463 I2C_FUNC_SMBUS_WRITE_BYTE)) { 464 dev_info(&client->dev, 465 "i2c adapter does not support SMBUS_WRITE_BYTE, sleep disabled"); 466 return NULL; 467 } 468 469 gpio = devm_gpiod_get_optional(&client->dev, "wakeup", GPIOD_IN); 470 471 if (IS_ERR(gpio)) { 472 dev_warn(&client->dev, 473 "gpio acquisition failed with error %ld, sleep disabled", 474 PTR_ERR(gpio)); 475 return NULL; 476 } else if (!gpio) { 477 dev_info(&client->dev, 478 "wakeup-gpio not found, sleep disabled"); 479 } 480 481 return gpio; 482 } 483 #else 484 static inline int mlx90614_sleep(struct mlx90614_data *data) 485 { 486 return -ENOSYS; 487 } 488 static inline int mlx90614_wakeup(struct mlx90614_data *data) 489 { 490 return -ENOSYS; 491 } 492 static inline struct gpio_desc *mlx90614_probe_wakeup(struct i2c_client *client) 493 { 494 return NULL; 495 } 496 #endif 497 498 /* Return 0 for single sensor, 1 for dual sensor, <0 on error. */ 499 static int mlx90614_probe_num_ir_sensors(struct i2c_client *client) 500 { 501 s32 ret; 502 503 ret = i2c_smbus_read_word_data(client, MLX90614_CONFIG); 504 505 if (ret < 0) 506 return ret; 507 508 return (ret & MLX90614_CONFIG_DUAL_MASK) ? 1 : 0; 509 } 510 511 static int mlx90614_probe(struct i2c_client *client, 512 const struct i2c_device_id *id) 513 { 514 struct iio_dev *indio_dev; 515 struct mlx90614_data *data; 516 int ret; 517 518 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) 519 return -EOPNOTSUPP; 520 521 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 522 if (!indio_dev) 523 return -ENOMEM; 524 525 data = iio_priv(indio_dev); 526 i2c_set_clientdata(client, indio_dev); 527 data->client = client; 528 mutex_init(&data->lock); 529 data->wakeup_gpio = mlx90614_probe_wakeup(client); 530 531 mlx90614_wakeup(data); 532 533 indio_dev->dev.parent = &client->dev; 534 indio_dev->name = id->name; 535 indio_dev->modes = INDIO_DIRECT_MODE; 536 indio_dev->info = &mlx90614_info; 537 538 ret = mlx90614_probe_num_ir_sensors(client); 539 switch (ret) { 540 case 0: 541 dev_dbg(&client->dev, "Found single sensor"); 542 indio_dev->channels = mlx90614_channels; 543 indio_dev->num_channels = 2; 544 break; 545 case 1: 546 dev_dbg(&client->dev, "Found dual sensor"); 547 indio_dev->channels = mlx90614_channels; 548 indio_dev->num_channels = 3; 549 break; 550 default: 551 return ret; 552 } 553 554 if (data->wakeup_gpio) { 555 pm_runtime_set_autosuspend_delay(&client->dev, 556 MLX90614_AUTOSLEEP_DELAY); 557 pm_runtime_use_autosuspend(&client->dev); 558 pm_runtime_set_active(&client->dev); 559 pm_runtime_enable(&client->dev); 560 } 561 562 return iio_device_register(indio_dev); 563 } 564 565 static int mlx90614_remove(struct i2c_client *client) 566 { 567 struct iio_dev *indio_dev = i2c_get_clientdata(client); 568 struct mlx90614_data *data = iio_priv(indio_dev); 569 570 iio_device_unregister(indio_dev); 571 572 if (data->wakeup_gpio) { 573 pm_runtime_disable(&client->dev); 574 if (!pm_runtime_status_suspended(&client->dev)) 575 mlx90614_sleep(data); 576 pm_runtime_set_suspended(&client->dev); 577 } 578 579 return 0; 580 } 581 582 static const struct i2c_device_id mlx90614_id[] = { 583 { "mlx90614", 0 }, 584 { } 585 }; 586 MODULE_DEVICE_TABLE(i2c, mlx90614_id); 587 588 #ifdef CONFIG_PM_SLEEP 589 static int mlx90614_pm_suspend(struct device *dev) 590 { 591 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 592 struct mlx90614_data *data = iio_priv(indio_dev); 593 594 if (data->wakeup_gpio && pm_runtime_active(dev)) 595 return mlx90614_sleep(data); 596 597 return 0; 598 } 599 600 static int mlx90614_pm_resume(struct device *dev) 601 { 602 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 603 struct mlx90614_data *data = iio_priv(indio_dev); 604 int err; 605 606 if (data->wakeup_gpio) { 607 err = mlx90614_wakeup(data); 608 if (err < 0) 609 return err; 610 611 pm_runtime_disable(dev); 612 pm_runtime_set_active(dev); 613 pm_runtime_enable(dev); 614 } 615 616 return 0; 617 } 618 #endif 619 620 #ifdef CONFIG_PM 621 static int mlx90614_pm_runtime_suspend(struct device *dev) 622 { 623 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 624 struct mlx90614_data *data = iio_priv(indio_dev); 625 626 return mlx90614_sleep(data); 627 } 628 629 static int mlx90614_pm_runtime_resume(struct device *dev) 630 { 631 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 632 struct mlx90614_data *data = iio_priv(indio_dev); 633 634 return mlx90614_wakeup(data); 635 } 636 #endif 637 638 static const struct dev_pm_ops mlx90614_pm_ops = { 639 SET_SYSTEM_SLEEP_PM_OPS(mlx90614_pm_suspend, mlx90614_pm_resume) 640 SET_RUNTIME_PM_OPS(mlx90614_pm_runtime_suspend, 641 mlx90614_pm_runtime_resume, NULL) 642 }; 643 644 static struct i2c_driver mlx90614_driver = { 645 .driver = { 646 .name = "mlx90614", 647 .pm = &mlx90614_pm_ops, 648 }, 649 .probe = mlx90614_probe, 650 .remove = mlx90614_remove, 651 .id_table = mlx90614_id, 652 }; 653 module_i2c_driver(mlx90614_driver); 654 655 MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>"); 656 MODULE_AUTHOR("Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>"); 657 MODULE_AUTHOR("Crt Mori <cmo@melexis.com>"); 658 MODULE_DESCRIPTION("Melexis MLX90614 contactless IR temperature sensor driver"); 659 MODULE_LICENSE("GPL"); 660