1 /* 2 * jc42.c - driver for Jedec JC42.4 compliant temperature sensors 3 * 4 * Copyright (c) 2010 Ericsson AB. 5 * 6 * Derived from lm77.c by Andras BALI <drewie@freemail.hu>. 7 * 8 * JC42.4 compliant temperature sensors are typically used on memory modules. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23 */ 24 25 #include <linux/module.h> 26 #include <linux/init.h> 27 #include <linux/slab.h> 28 #include <linux/jiffies.h> 29 #include <linux/i2c.h> 30 #include <linux/hwmon.h> 31 #include <linux/hwmon-sysfs.h> 32 #include <linux/err.h> 33 #include <linux/mutex.h> 34 35 /* Addresses to scan */ 36 static const unsigned short normal_i2c[] = { 37 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END }; 38 39 /* JC42 registers. All registers are 16 bit. */ 40 #define JC42_REG_CAP 0x00 41 #define JC42_REG_CONFIG 0x01 42 #define JC42_REG_TEMP_UPPER 0x02 43 #define JC42_REG_TEMP_LOWER 0x03 44 #define JC42_REG_TEMP_CRITICAL 0x04 45 #define JC42_REG_TEMP 0x05 46 #define JC42_REG_MANID 0x06 47 #define JC42_REG_DEVICEID 0x07 48 49 /* Status bits in temperature register */ 50 #define JC42_ALARM_CRIT_BIT 15 51 #define JC42_ALARM_MAX_BIT 14 52 #define JC42_ALARM_MIN_BIT 13 53 54 /* Configuration register defines */ 55 #define JC42_CFG_CRIT_ONLY (1 << 2) 56 #define JC42_CFG_TCRIT_LOCK (1 << 6) 57 #define JC42_CFG_EVENT_LOCK (1 << 7) 58 #define JC42_CFG_SHUTDOWN (1 << 8) 59 #define JC42_CFG_HYST_SHIFT 9 60 #define JC42_CFG_HYST_MASK 0x03 61 62 /* Capabilities */ 63 #define JC42_CAP_RANGE (1 << 2) 64 65 /* Manufacturer IDs */ 66 #define ADT_MANID 0x11d4 /* Analog Devices */ 67 #define ATMEL_MANID 0x001f /* Atmel */ 68 #define MAX_MANID 0x004d /* Maxim */ 69 #define IDT_MANID 0x00b3 /* IDT */ 70 #define MCP_MANID 0x0054 /* Microchip */ 71 #define NXP_MANID 0x1131 /* NXP Semiconductors */ 72 #define ONS_MANID 0x1b09 /* ON Semiconductor */ 73 #define STM_MANID 0x104a /* ST Microelectronics */ 74 75 /* Supported chips */ 76 77 /* Analog Devices */ 78 #define ADT7408_DEVID 0x0801 79 #define ADT7408_DEVID_MASK 0xffff 80 81 /* Atmel */ 82 #define AT30TS00_DEVID 0x8201 83 #define AT30TS00_DEVID_MASK 0xffff 84 85 /* IDT */ 86 #define TS3000B3_DEVID 0x2903 /* Also matches TSE2002B3 */ 87 #define TS3000B3_DEVID_MASK 0xffff 88 89 #define TS3000GB2_DEVID 0x2912 /* Also matches TSE2002GB2 */ 90 #define TS3000GB2_DEVID_MASK 0xffff 91 92 /* Maxim */ 93 #define MAX6604_DEVID 0x3e00 94 #define MAX6604_DEVID_MASK 0xffff 95 96 /* Microchip */ 97 #define MCP9804_DEVID 0x0200 98 #define MCP9804_DEVID_MASK 0xfffc 99 100 #define MCP98242_DEVID 0x2000 101 #define MCP98242_DEVID_MASK 0xfffc 102 103 #define MCP98243_DEVID 0x2100 104 #define MCP98243_DEVID_MASK 0xfffc 105 106 #define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */ 107 #define MCP9843_DEVID_MASK 0xfffe 108 109 /* NXP */ 110 #define SE97_DEVID 0xa200 111 #define SE97_DEVID_MASK 0xfffc 112 113 #define SE98_DEVID 0xa100 114 #define SE98_DEVID_MASK 0xfffc 115 116 /* ON Semiconductor */ 117 #define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */ 118 #define CAT6095_DEVID_MASK 0xffe0 119 120 /* ST Microelectronics */ 121 #define STTS424_DEVID 0x0101 122 #define STTS424_DEVID_MASK 0xffff 123 124 #define STTS424E_DEVID 0x0000 125 #define STTS424E_DEVID_MASK 0xfffe 126 127 #define STTS2002_DEVID 0x0300 128 #define STTS2002_DEVID_MASK 0xffff 129 130 #define STTS3000_DEVID 0x0200 131 #define STTS3000_DEVID_MASK 0xffff 132 133 static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 }; 134 135 struct jc42_chips { 136 u16 manid; 137 u16 devid; 138 u16 devid_mask; 139 }; 140 141 static struct jc42_chips jc42_chips[] = { 142 { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK }, 143 { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK }, 144 { IDT_MANID, TS3000B3_DEVID, TS3000B3_DEVID_MASK }, 145 { IDT_MANID, TS3000GB2_DEVID, TS3000GB2_DEVID_MASK }, 146 { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK }, 147 { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK }, 148 { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK }, 149 { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK }, 150 { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK }, 151 { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK }, 152 { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK }, 153 { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK }, 154 { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK }, 155 { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK }, 156 { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK }, 157 { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK }, 158 }; 159 160 /* Each client has this additional data */ 161 struct jc42_data { 162 struct device *hwmon_dev; 163 struct mutex update_lock; /* protect register access */ 164 bool extended; /* true if extended range supported */ 165 bool valid; 166 unsigned long last_updated; /* In jiffies */ 167 u16 orig_config; /* original configuration */ 168 u16 config; /* current configuration */ 169 u16 temp_input; /* Temperatures */ 170 u16 temp_crit; 171 u16 temp_min; 172 u16 temp_max; 173 }; 174 175 static int jc42_probe(struct i2c_client *client, 176 const struct i2c_device_id *id); 177 static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info); 178 static int jc42_remove(struct i2c_client *client); 179 180 static struct jc42_data *jc42_update_device(struct device *dev); 181 182 static const struct i2c_device_id jc42_id[] = { 183 { "adt7408", 0 }, 184 { "at30ts00", 0 }, 185 { "cat94ts02", 0 }, 186 { "cat6095", 0 }, 187 { "jc42", 0 }, 188 { "max6604", 0 }, 189 { "mcp9804", 0 }, 190 { "mcp9805", 0 }, 191 { "mcp98242", 0 }, 192 { "mcp98243", 0 }, 193 { "mcp9843", 0 }, 194 { "se97", 0 }, 195 { "se97b", 0 }, 196 { "se98", 0 }, 197 { "stts424", 0 }, 198 { "stts2002", 0 }, 199 { "stts3000", 0 }, 200 { "tse2002", 0 }, 201 { "ts3000", 0 }, 202 { } 203 }; 204 MODULE_DEVICE_TABLE(i2c, jc42_id); 205 206 #ifdef CONFIG_PM 207 208 static int jc42_suspend(struct device *dev) 209 { 210 struct i2c_client *client = to_i2c_client(dev); 211 struct jc42_data *data = i2c_get_clientdata(client); 212 213 data->config |= JC42_CFG_SHUTDOWN; 214 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config); 215 return 0; 216 } 217 218 static int jc42_resume(struct device *dev) 219 { 220 struct i2c_client *client = to_i2c_client(dev); 221 struct jc42_data *data = i2c_get_clientdata(client); 222 223 data->config &= ~JC42_CFG_SHUTDOWN; 224 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config); 225 return 0; 226 } 227 228 static const struct dev_pm_ops jc42_dev_pm_ops = { 229 .suspend = jc42_suspend, 230 .resume = jc42_resume, 231 }; 232 233 #define JC42_DEV_PM_OPS (&jc42_dev_pm_ops) 234 #else 235 #define JC42_DEV_PM_OPS NULL 236 #endif /* CONFIG_PM */ 237 238 /* This is the driver that will be inserted */ 239 static struct i2c_driver jc42_driver = { 240 .class = I2C_CLASS_SPD, 241 .driver = { 242 .name = "jc42", 243 .pm = JC42_DEV_PM_OPS, 244 }, 245 .probe = jc42_probe, 246 .remove = jc42_remove, 247 .id_table = jc42_id, 248 .detect = jc42_detect, 249 .address_list = normal_i2c, 250 }; 251 252 #define JC42_TEMP_MIN_EXTENDED (-40000) 253 #define JC42_TEMP_MIN 0 254 #define JC42_TEMP_MAX 125000 255 256 static u16 jc42_temp_to_reg(int temp, bool extended) 257 { 258 int ntemp = SENSORS_LIMIT(temp, 259 extended ? JC42_TEMP_MIN_EXTENDED : 260 JC42_TEMP_MIN, JC42_TEMP_MAX); 261 262 /* convert from 0.001 to 0.0625 resolution */ 263 return (ntemp * 2 / 125) & 0x1fff; 264 } 265 266 static int jc42_temp_from_reg(s16 reg) 267 { 268 reg &= 0x1fff; 269 270 /* sign extend register */ 271 if (reg & 0x1000) 272 reg |= 0xf000; 273 274 /* convert from 0.0625 to 0.001 resolution */ 275 return reg * 125 / 2; 276 } 277 278 /* sysfs stuff */ 279 280 /* read routines for temperature limits */ 281 #define show(value) \ 282 static ssize_t show_##value(struct device *dev, \ 283 struct device_attribute *attr, \ 284 char *buf) \ 285 { \ 286 struct jc42_data *data = jc42_update_device(dev); \ 287 if (IS_ERR(data)) \ 288 return PTR_ERR(data); \ 289 return sprintf(buf, "%d\n", jc42_temp_from_reg(data->value)); \ 290 } 291 292 show(temp_input); 293 show(temp_crit); 294 show(temp_min); 295 show(temp_max); 296 297 /* read routines for hysteresis values */ 298 static ssize_t show_temp_crit_hyst(struct device *dev, 299 struct device_attribute *attr, char *buf) 300 { 301 struct jc42_data *data = jc42_update_device(dev); 302 int temp, hyst; 303 304 if (IS_ERR(data)) 305 return PTR_ERR(data); 306 307 temp = jc42_temp_from_reg(data->temp_crit); 308 hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) 309 & JC42_CFG_HYST_MASK]; 310 return sprintf(buf, "%d\n", temp - hyst); 311 } 312 313 static ssize_t show_temp_max_hyst(struct device *dev, 314 struct device_attribute *attr, char *buf) 315 { 316 struct jc42_data *data = jc42_update_device(dev); 317 int temp, hyst; 318 319 if (IS_ERR(data)) 320 return PTR_ERR(data); 321 322 temp = jc42_temp_from_reg(data->temp_max); 323 hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) 324 & JC42_CFG_HYST_MASK]; 325 return sprintf(buf, "%d\n", temp - hyst); 326 } 327 328 /* write routines */ 329 #define set(value, reg) \ 330 static ssize_t set_##value(struct device *dev, \ 331 struct device_attribute *attr, \ 332 const char *buf, size_t count) \ 333 { \ 334 struct i2c_client *client = to_i2c_client(dev); \ 335 struct jc42_data *data = i2c_get_clientdata(client); \ 336 int err, ret = count; \ 337 long val; \ 338 if (kstrtol(buf, 10, &val) < 0) \ 339 return -EINVAL; \ 340 mutex_lock(&data->update_lock); \ 341 data->value = jc42_temp_to_reg(val, data->extended); \ 342 err = i2c_smbus_write_word_swapped(client, reg, data->value); \ 343 if (err < 0) \ 344 ret = err; \ 345 mutex_unlock(&data->update_lock); \ 346 return ret; \ 347 } 348 349 set(temp_min, JC42_REG_TEMP_LOWER); 350 set(temp_max, JC42_REG_TEMP_UPPER); 351 set(temp_crit, JC42_REG_TEMP_CRITICAL); 352 353 /* JC42.4 compliant chips only support four hysteresis values. 354 * Pick best choice and go from there. */ 355 static ssize_t set_temp_crit_hyst(struct device *dev, 356 struct device_attribute *attr, 357 const char *buf, size_t count) 358 { 359 struct i2c_client *client = to_i2c_client(dev); 360 struct jc42_data *data = i2c_get_clientdata(client); 361 unsigned long val; 362 int diff, hyst; 363 int err; 364 int ret = count; 365 366 if (kstrtoul(buf, 10, &val) < 0) 367 return -EINVAL; 368 369 diff = jc42_temp_from_reg(data->temp_crit) - val; 370 hyst = 0; 371 if (diff > 0) { 372 if (diff < 2250) 373 hyst = 1; /* 1.5 degrees C */ 374 else if (diff < 4500) 375 hyst = 2; /* 3.0 degrees C */ 376 else 377 hyst = 3; /* 6.0 degrees C */ 378 } 379 380 mutex_lock(&data->update_lock); 381 data->config = (data->config 382 & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT)) 383 | (hyst << JC42_CFG_HYST_SHIFT); 384 err = i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, 385 data->config); 386 if (err < 0) 387 ret = err; 388 mutex_unlock(&data->update_lock); 389 return ret; 390 } 391 392 static ssize_t show_alarm(struct device *dev, 393 struct device_attribute *attr, char *buf) 394 { 395 u16 bit = to_sensor_dev_attr(attr)->index; 396 struct jc42_data *data = jc42_update_device(dev); 397 u16 val; 398 399 if (IS_ERR(data)) 400 return PTR_ERR(data); 401 402 val = data->temp_input; 403 if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY)) 404 val = 0; 405 return sprintf(buf, "%u\n", (val >> bit) & 1); 406 } 407 408 static DEVICE_ATTR(temp1_input, S_IRUGO, 409 show_temp_input, NULL); 410 static DEVICE_ATTR(temp1_crit, S_IRUGO, 411 show_temp_crit, set_temp_crit); 412 static DEVICE_ATTR(temp1_min, S_IRUGO, 413 show_temp_min, set_temp_min); 414 static DEVICE_ATTR(temp1_max, S_IRUGO, 415 show_temp_max, set_temp_max); 416 417 static DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, 418 show_temp_crit_hyst, set_temp_crit_hyst); 419 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO, 420 show_temp_max_hyst, NULL); 421 422 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 423 JC42_ALARM_CRIT_BIT); 424 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 425 JC42_ALARM_MIN_BIT); 426 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 427 JC42_ALARM_MAX_BIT); 428 429 static struct attribute *jc42_attributes[] = { 430 &dev_attr_temp1_input.attr, 431 &dev_attr_temp1_crit.attr, 432 &dev_attr_temp1_min.attr, 433 &dev_attr_temp1_max.attr, 434 &dev_attr_temp1_crit_hyst.attr, 435 &dev_attr_temp1_max_hyst.attr, 436 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 437 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, 438 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 439 NULL 440 }; 441 442 static umode_t jc42_attribute_mode(struct kobject *kobj, 443 struct attribute *attr, int index) 444 { 445 struct device *dev = container_of(kobj, struct device, kobj); 446 struct i2c_client *client = to_i2c_client(dev); 447 struct jc42_data *data = i2c_get_clientdata(client); 448 unsigned int config = data->config; 449 bool readonly; 450 451 if (attr == &dev_attr_temp1_crit.attr) 452 readonly = config & JC42_CFG_TCRIT_LOCK; 453 else if (attr == &dev_attr_temp1_min.attr || 454 attr == &dev_attr_temp1_max.attr) 455 readonly = config & JC42_CFG_EVENT_LOCK; 456 else if (attr == &dev_attr_temp1_crit_hyst.attr) 457 readonly = config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK); 458 else 459 readonly = true; 460 461 return S_IRUGO | (readonly ? 0 : S_IWUSR); 462 } 463 464 static const struct attribute_group jc42_group = { 465 .attrs = jc42_attributes, 466 .is_visible = jc42_attribute_mode, 467 }; 468 469 /* Return 0 if detection is successful, -ENODEV otherwise */ 470 static int jc42_detect(struct i2c_client *new_client, 471 struct i2c_board_info *info) 472 { 473 struct i2c_adapter *adapter = new_client->adapter; 474 int i, config, cap, manid, devid; 475 476 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 477 I2C_FUNC_SMBUS_WORD_DATA)) 478 return -ENODEV; 479 480 cap = i2c_smbus_read_word_swapped(new_client, JC42_REG_CAP); 481 config = i2c_smbus_read_word_swapped(new_client, JC42_REG_CONFIG); 482 manid = i2c_smbus_read_word_swapped(new_client, JC42_REG_MANID); 483 devid = i2c_smbus_read_word_swapped(new_client, JC42_REG_DEVICEID); 484 485 if (cap < 0 || config < 0 || manid < 0 || devid < 0) 486 return -ENODEV; 487 488 if ((cap & 0xff00) || (config & 0xf800)) 489 return -ENODEV; 490 491 for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) { 492 struct jc42_chips *chip = &jc42_chips[i]; 493 if (manid == chip->manid && 494 (devid & chip->devid_mask) == chip->devid) { 495 strlcpy(info->type, "jc42", I2C_NAME_SIZE); 496 return 0; 497 } 498 } 499 return -ENODEV; 500 } 501 502 static int jc42_probe(struct i2c_client *new_client, 503 const struct i2c_device_id *id) 504 { 505 struct jc42_data *data; 506 int config, cap, err; 507 508 data = kzalloc(sizeof(struct jc42_data), GFP_KERNEL); 509 if (!data) { 510 err = -ENOMEM; 511 goto exit; 512 } 513 514 i2c_set_clientdata(new_client, data); 515 mutex_init(&data->update_lock); 516 517 cap = i2c_smbus_read_word_swapped(new_client, JC42_REG_CAP); 518 if (cap < 0) { 519 err = -EINVAL; 520 goto exit_free; 521 } 522 data->extended = !!(cap & JC42_CAP_RANGE); 523 524 config = i2c_smbus_read_word_swapped(new_client, JC42_REG_CONFIG); 525 if (config < 0) { 526 err = -EINVAL; 527 goto exit_free; 528 } 529 data->orig_config = config; 530 if (config & JC42_CFG_SHUTDOWN) { 531 config &= ~JC42_CFG_SHUTDOWN; 532 i2c_smbus_write_word_swapped(new_client, JC42_REG_CONFIG, 533 config); 534 } 535 data->config = config; 536 537 /* Register sysfs hooks */ 538 err = sysfs_create_group(&new_client->dev.kobj, &jc42_group); 539 if (err) 540 goto exit_free; 541 542 data->hwmon_dev = hwmon_device_register(&new_client->dev); 543 if (IS_ERR(data->hwmon_dev)) { 544 err = PTR_ERR(data->hwmon_dev); 545 goto exit_remove; 546 } 547 548 return 0; 549 550 exit_remove: 551 sysfs_remove_group(&new_client->dev.kobj, &jc42_group); 552 exit_free: 553 kfree(data); 554 exit: 555 return err; 556 } 557 558 static int jc42_remove(struct i2c_client *client) 559 { 560 struct jc42_data *data = i2c_get_clientdata(client); 561 hwmon_device_unregister(data->hwmon_dev); 562 sysfs_remove_group(&client->dev.kobj, &jc42_group); 563 if (data->config != data->orig_config) 564 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, 565 data->orig_config); 566 kfree(data); 567 return 0; 568 } 569 570 static struct jc42_data *jc42_update_device(struct device *dev) 571 { 572 struct i2c_client *client = to_i2c_client(dev); 573 struct jc42_data *data = i2c_get_clientdata(client); 574 struct jc42_data *ret = data; 575 int val; 576 577 mutex_lock(&data->update_lock); 578 579 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 580 val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP); 581 if (val < 0) { 582 ret = ERR_PTR(val); 583 goto abort; 584 } 585 data->temp_input = val; 586 587 val = i2c_smbus_read_word_swapped(client, 588 JC42_REG_TEMP_CRITICAL); 589 if (val < 0) { 590 ret = ERR_PTR(val); 591 goto abort; 592 } 593 data->temp_crit = val; 594 595 val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_LOWER); 596 if (val < 0) { 597 ret = ERR_PTR(val); 598 goto abort; 599 } 600 data->temp_min = val; 601 602 val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_UPPER); 603 if (val < 0) { 604 ret = ERR_PTR(val); 605 goto abort; 606 } 607 data->temp_max = val; 608 609 data->last_updated = jiffies; 610 data->valid = true; 611 } 612 abort: 613 mutex_unlock(&data->update_lock); 614 return ret; 615 } 616 617 static int __init sensors_jc42_init(void) 618 { 619 return i2c_add_driver(&jc42_driver); 620 } 621 622 static void __exit sensors_jc42_exit(void) 623 { 624 i2c_del_driver(&jc42_driver); 625 } 626 627 MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>"); 628 MODULE_DESCRIPTION("JC42 driver"); 629 MODULE_LICENSE("GPL"); 630 631 module_init(sensors_jc42_init); 632 module_exit(sensors_jc42_exit); 633