1/* tmp401.c 2 * 3 * Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com> 4 * Preliminary tmp411 support by: 5 * Gabriel Konat, Sander Leget, Wouter Willems 6 * Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23/* 24 * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC. 25 * 26 * Note this IC is in some aspect similar to the LM90, but it has quite a 27 * few differences too, for example the local temp has a higher resolution 28 * and thus has 16 bits registers for its value and limit instead of 8 bits. 29 */ 30 31#include <linux/module.h> 32#include <linux/init.h> 33#include <linux/slab.h> 34#include <linux/jiffies.h> 35#include <linux/i2c.h> 36#include <linux/hwmon.h> 37#include <linux/hwmon-sysfs.h> 38#include <linux/err.h> 39#include <linux/mutex.h> 40#include <linux/sysfs.h> 41 42/* Addresses to scan */ 43static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; 44 45enum chips { tmp401, tmp411 }; 46 47/* 48 * The TMP401 registers, note some registers have different addresses for 49 * reading and writing 50 */ 51#define TMP401_STATUS 0x02 52#define TMP401_CONFIG_READ 0x03 53#define TMP401_CONFIG_WRITE 0x09 54#define TMP401_CONVERSION_RATE_READ 0x04 55#define TMP401_CONVERSION_RATE_WRITE 0x0A 56#define TMP401_TEMP_CRIT_HYST 0x21 57#define TMP401_CONSECUTIVE_ALERT 0x22 58#define TMP401_MANUFACTURER_ID_REG 0xFE 59#define TMP401_DEVICE_ID_REG 0xFF 60#define TMP411_N_FACTOR_REG 0x18 61 62static const u8 TMP401_TEMP_MSB[2] = { 0x00, 0x01 }; 63static const u8 TMP401_TEMP_LSB[2] = { 0x15, 0x10 }; 64static const u8 TMP401_TEMP_LOW_LIMIT_MSB_READ[2] = { 0x06, 0x08 }; 65static const u8 TMP401_TEMP_LOW_LIMIT_MSB_WRITE[2] = { 0x0C, 0x0E }; 66static const u8 TMP401_TEMP_LOW_LIMIT_LSB[2] = { 0x17, 0x14 }; 67static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_READ[2] = { 0x05, 0x07 }; 68static const u8 TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[2] = { 0x0B, 0x0D }; 69static const u8 TMP401_TEMP_HIGH_LIMIT_LSB[2] = { 0x16, 0x13 }; 70/* These are called the THERM limit / hysteresis / mask in the datasheet */ 71static const u8 TMP401_TEMP_CRIT_LIMIT[2] = { 0x20, 0x19 }; 72 73static const u8 TMP411_TEMP_LOWEST_MSB[2] = { 0x30, 0x34 }; 74static const u8 TMP411_TEMP_LOWEST_LSB[2] = { 0x31, 0x35 }; 75static const u8 TMP411_TEMP_HIGHEST_MSB[2] = { 0x32, 0x36 }; 76static const u8 TMP411_TEMP_HIGHEST_LSB[2] = { 0x33, 0x37 }; 77 78/* Flags */ 79#define TMP401_CONFIG_RANGE 0x04 80#define TMP401_CONFIG_SHUTDOWN 0x40 81#define TMP401_STATUS_LOCAL_CRIT 0x01 82#define TMP401_STATUS_REMOTE_CRIT 0x02 83#define TMP401_STATUS_REMOTE_OPEN 0x04 84#define TMP401_STATUS_REMOTE_LOW 0x08 85#define TMP401_STATUS_REMOTE_HIGH 0x10 86#define TMP401_STATUS_LOCAL_LOW 0x20 87#define TMP401_STATUS_LOCAL_HIGH 0x40 88 89/* Manufacturer / Device ID's */ 90#define TMP401_MANUFACTURER_ID 0x55 91#define TMP401_DEVICE_ID 0x11 92#define TMP411_DEVICE_ID 0x12 93 94/* 95 * Driver data (common to all clients) 96 */ 97 98static const struct i2c_device_id tmp401_id[] = { 99 { "tmp401", tmp401 }, 100 { "tmp411", tmp411 }, 101 { } 102}; 103MODULE_DEVICE_TABLE(i2c, tmp401_id); 104 105/* 106 * Client data (each client gets its own) 107 */ 108 109struct tmp401_data { 110 struct device *hwmon_dev; 111 struct mutex update_lock; 112 char valid; /* zero until following fields are valid */ 113 unsigned long last_updated; /* in jiffies */ 114 enum chips kind; 115 116 /* register values */ 117 u8 status; 118 u8 config; 119 u16 temp[2]; 120 u16 temp_low[2]; 121 u16 temp_high[2]; 122 u8 temp_crit[2]; 123 u8 temp_crit_hyst; 124 u16 temp_lowest[2]; 125 u16 temp_highest[2]; 126}; 127 128/* 129 * Sysfs attr show / store functions 130 */ 131 132static int tmp401_register_to_temp(u16 reg, u8 config) 133{ 134 int temp = reg; 135 136 if (config & TMP401_CONFIG_RANGE) 137 temp -= 64 * 256; 138 139 return (temp * 625 + 80) / 160; 140} 141 142static u16 tmp401_temp_to_register(long temp, u8 config) 143{ 144 if (config & TMP401_CONFIG_RANGE) { 145 temp = SENSORS_LIMIT(temp, -64000, 191000); 146 temp += 64000; 147 } else 148 temp = SENSORS_LIMIT(temp, 0, 127000); 149 150 return (temp * 160 + 312) / 625; 151} 152 153static int tmp401_crit_register_to_temp(u8 reg, u8 config) 154{ 155 int temp = reg; 156 157 if (config & TMP401_CONFIG_RANGE) 158 temp -= 64; 159 160 return temp * 1000; 161} 162 163static u8 tmp401_crit_temp_to_register(long temp, u8 config) 164{ 165 if (config & TMP401_CONFIG_RANGE) { 166 temp = SENSORS_LIMIT(temp, -64000, 191000); 167 temp += 64000; 168 } else 169 temp = SENSORS_LIMIT(temp, 0, 127000); 170 171 return (temp + 500) / 1000; 172} 173 174static struct tmp401_data *tmp401_update_device_reg16( 175 struct i2c_client *client, struct tmp401_data *data) 176{ 177 int i; 178 179 for (i = 0; i < 2; i++) { 180 /* 181 * High byte must be read first immediately followed 182 * by the low byte 183 */ 184 data->temp[i] = i2c_smbus_read_byte_data(client, 185 TMP401_TEMP_MSB[i]) << 8; 186 data->temp[i] |= i2c_smbus_read_byte_data(client, 187 TMP401_TEMP_LSB[i]); 188 data->temp_low[i] = i2c_smbus_read_byte_data(client, 189 TMP401_TEMP_LOW_LIMIT_MSB_READ[i]) << 8; 190 data->temp_low[i] |= i2c_smbus_read_byte_data(client, 191 TMP401_TEMP_LOW_LIMIT_LSB[i]); 192 data->temp_high[i] = i2c_smbus_read_byte_data(client, 193 TMP401_TEMP_HIGH_LIMIT_MSB_READ[i]) << 8; 194 data->temp_high[i] |= i2c_smbus_read_byte_data(client, 195 TMP401_TEMP_HIGH_LIMIT_LSB[i]); 196 data->temp_crit[i] = i2c_smbus_read_byte_data(client, 197 TMP401_TEMP_CRIT_LIMIT[i]); 198 199 if (data->kind == tmp411) { 200 data->temp_lowest[i] = i2c_smbus_read_byte_data(client, 201 TMP411_TEMP_LOWEST_MSB[i]) << 8; 202 data->temp_lowest[i] |= i2c_smbus_read_byte_data( 203 client, TMP411_TEMP_LOWEST_LSB[i]); 204 205 data->temp_highest[i] = i2c_smbus_read_byte_data( 206 client, TMP411_TEMP_HIGHEST_MSB[i]) << 8; 207 data->temp_highest[i] |= i2c_smbus_read_byte_data( 208 client, TMP411_TEMP_HIGHEST_LSB[i]); 209 } 210 } 211 return data; 212} 213 214static struct tmp401_data *tmp401_update_device(struct device *dev) 215{ 216 struct i2c_client *client = to_i2c_client(dev); 217 struct tmp401_data *data = i2c_get_clientdata(client); 218 219 mutex_lock(&data->update_lock); 220 221 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 222 data->status = i2c_smbus_read_byte_data(client, TMP401_STATUS); 223 data->config = i2c_smbus_read_byte_data(client, 224 TMP401_CONFIG_READ); 225 tmp401_update_device_reg16(client, data); 226 227 data->temp_crit_hyst = i2c_smbus_read_byte_data(client, 228 TMP401_TEMP_CRIT_HYST); 229 230 data->last_updated = jiffies; 231 data->valid = 1; 232 } 233 234 mutex_unlock(&data->update_lock); 235 236 return data; 237} 238 239static ssize_t show_temp_value(struct device *dev, 240 struct device_attribute *devattr, char *buf) 241{ 242 int index = to_sensor_dev_attr(devattr)->index; 243 struct tmp401_data *data = tmp401_update_device(dev); 244 245 return sprintf(buf, "%d\n", 246 tmp401_register_to_temp(data->temp[index], data->config)); 247} 248 249static ssize_t show_temp_min(struct device *dev, 250 struct device_attribute *devattr, char *buf) 251{ 252 int index = to_sensor_dev_attr(devattr)->index; 253 struct tmp401_data *data = tmp401_update_device(dev); 254 255 return sprintf(buf, "%d\n", 256 tmp401_register_to_temp(data->temp_low[index], data->config)); 257} 258 259static ssize_t show_temp_max(struct device *dev, 260 struct device_attribute *devattr, char *buf) 261{ 262 int index = to_sensor_dev_attr(devattr)->index; 263 struct tmp401_data *data = tmp401_update_device(dev); 264 265 return sprintf(buf, "%d\n", 266 tmp401_register_to_temp(data->temp_high[index], data->config)); 267} 268 269static ssize_t show_temp_crit(struct device *dev, 270 struct device_attribute *devattr, char *buf) 271{ 272 int index = to_sensor_dev_attr(devattr)->index; 273 struct tmp401_data *data = tmp401_update_device(dev); 274 275 return sprintf(buf, "%d\n", 276 tmp401_crit_register_to_temp(data->temp_crit[index], 277 data->config)); 278} 279 280static ssize_t show_temp_crit_hyst(struct device *dev, 281 struct device_attribute *devattr, char *buf) 282{ 283 int temp, index = to_sensor_dev_attr(devattr)->index; 284 struct tmp401_data *data = tmp401_update_device(dev); 285 286 mutex_lock(&data->update_lock); 287 temp = tmp401_crit_register_to_temp(data->temp_crit[index], 288 data->config); 289 temp -= data->temp_crit_hyst * 1000; 290 mutex_unlock(&data->update_lock); 291 292 return sprintf(buf, "%d\n", temp); 293} 294 295static ssize_t show_temp_lowest(struct device *dev, 296 struct device_attribute *devattr, char *buf) 297{ 298 int index = to_sensor_dev_attr(devattr)->index; 299 struct tmp401_data *data = tmp401_update_device(dev); 300 301 return sprintf(buf, "%d\n", 302 tmp401_register_to_temp(data->temp_lowest[index], 303 data->config)); 304} 305 306static ssize_t show_temp_highest(struct device *dev, 307 struct device_attribute *devattr, char *buf) 308{ 309 int index = to_sensor_dev_attr(devattr)->index; 310 struct tmp401_data *data = tmp401_update_device(dev); 311 312 return sprintf(buf, "%d\n", 313 tmp401_register_to_temp(data->temp_highest[index], 314 data->config)); 315} 316 317static ssize_t show_status(struct device *dev, 318 struct device_attribute *devattr, char *buf) 319{ 320 int mask = to_sensor_dev_attr(devattr)->index; 321 struct tmp401_data *data = tmp401_update_device(dev); 322 323 if (data->status & mask) 324 return sprintf(buf, "1\n"); 325 else 326 return sprintf(buf, "0\n"); 327} 328 329static ssize_t store_temp_min(struct device *dev, struct device_attribute 330 *devattr, const char *buf, size_t count) 331{ 332 int index = to_sensor_dev_attr(devattr)->index; 333 struct tmp401_data *data = tmp401_update_device(dev); 334 long val; 335 u16 reg; 336 337 if (strict_strtol(buf, 10, &val)) 338 return -EINVAL; 339 340 reg = tmp401_temp_to_register(val, data->config); 341 342 mutex_lock(&data->update_lock); 343 344 i2c_smbus_write_byte_data(to_i2c_client(dev), 345 TMP401_TEMP_LOW_LIMIT_MSB_WRITE[index], reg >> 8); 346 i2c_smbus_write_byte_data(to_i2c_client(dev), 347 TMP401_TEMP_LOW_LIMIT_LSB[index], reg & 0xFF); 348 349 data->temp_low[index] = reg; 350 351 mutex_unlock(&data->update_lock); 352 353 return count; 354} 355 356static ssize_t store_temp_max(struct device *dev, struct device_attribute 357 *devattr, const char *buf, size_t count) 358{ 359 int index = to_sensor_dev_attr(devattr)->index; 360 struct tmp401_data *data = tmp401_update_device(dev); 361 long val; 362 u16 reg; 363 364 if (strict_strtol(buf, 10, &val)) 365 return -EINVAL; 366 367 reg = tmp401_temp_to_register(val, data->config); 368 369 mutex_lock(&data->update_lock); 370 371 i2c_smbus_write_byte_data(to_i2c_client(dev), 372 TMP401_TEMP_HIGH_LIMIT_MSB_WRITE[index], reg >> 8); 373 i2c_smbus_write_byte_data(to_i2c_client(dev), 374 TMP401_TEMP_HIGH_LIMIT_LSB[index], reg & 0xFF); 375 376 data->temp_high[index] = reg; 377 378 mutex_unlock(&data->update_lock); 379 380 return count; 381} 382 383static ssize_t store_temp_crit(struct device *dev, struct device_attribute 384 *devattr, const char *buf, size_t count) 385{ 386 int index = to_sensor_dev_attr(devattr)->index; 387 struct tmp401_data *data = tmp401_update_device(dev); 388 long val; 389 u8 reg; 390 391 if (strict_strtol(buf, 10, &val)) 392 return -EINVAL; 393 394 reg = tmp401_crit_temp_to_register(val, data->config); 395 396 mutex_lock(&data->update_lock); 397 398 i2c_smbus_write_byte_data(to_i2c_client(dev), 399 TMP401_TEMP_CRIT_LIMIT[index], reg); 400 401 data->temp_crit[index] = reg; 402 403 mutex_unlock(&data->update_lock); 404 405 return count; 406} 407 408static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute 409 *devattr, const char *buf, size_t count) 410{ 411 int temp, index = to_sensor_dev_attr(devattr)->index; 412 struct tmp401_data *data = tmp401_update_device(dev); 413 long val; 414 u8 reg; 415 416 if (strict_strtol(buf, 10, &val)) 417 return -EINVAL; 418 419 if (data->config & TMP401_CONFIG_RANGE) 420 val = SENSORS_LIMIT(val, -64000, 191000); 421 else 422 val = SENSORS_LIMIT(val, 0, 127000); 423 424 mutex_lock(&data->update_lock); 425 temp = tmp401_crit_register_to_temp(data->temp_crit[index], 426 data->config); 427 val = SENSORS_LIMIT(val, temp - 255000, temp); 428 reg = ((temp - val) + 500) / 1000; 429 430 i2c_smbus_write_byte_data(to_i2c_client(dev), 431 TMP401_TEMP_CRIT_HYST, reg); 432 433 data->temp_crit_hyst = reg; 434 435 mutex_unlock(&data->update_lock); 436 437 return count; 438} 439 440/* 441 * Resets the historical measurements of minimum and maximum temperatures. 442 * This is done by writing any value to any of the minimum/maximum registers 443 * (0x30-0x37). 444 */ 445static ssize_t reset_temp_history(struct device *dev, 446 struct device_attribute *devattr, const char *buf, size_t count) 447{ 448 long val; 449 450 if (strict_strtol(buf, 10, &val)) 451 return -EINVAL; 452 453 if (val != 1) { 454 dev_err(dev, "temp_reset_history value %ld not" 455 " supported. Use 1 to reset the history!\n", val); 456 return -EINVAL; 457 } 458 i2c_smbus_write_byte_data(to_i2c_client(dev), 459 TMP411_TEMP_LOWEST_MSB[0], val); 460 461 return count; 462} 463 464static struct sensor_device_attribute tmp401_attr[] = { 465 SENSOR_ATTR(temp1_input, S_IRUGO, show_temp_value, NULL, 0), 466 SENSOR_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, 467 store_temp_min, 0), 468 SENSOR_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, 469 store_temp_max, 0), 470 SENSOR_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_crit, 471 store_temp_crit, 0), 472 SENSOR_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_crit_hyst, 473 store_temp_crit_hyst, 0), 474 SENSOR_ATTR(temp1_min_alarm, S_IRUGO, show_status, NULL, 475 TMP401_STATUS_LOCAL_LOW), 476 SENSOR_ATTR(temp1_max_alarm, S_IRUGO, show_status, NULL, 477 TMP401_STATUS_LOCAL_HIGH), 478 SENSOR_ATTR(temp1_crit_alarm, S_IRUGO, show_status, NULL, 479 TMP401_STATUS_LOCAL_CRIT), 480 SENSOR_ATTR(temp2_input, S_IRUGO, show_temp_value, NULL, 1), 481 SENSOR_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, 482 store_temp_min, 1), 483 SENSOR_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, 484 store_temp_max, 1), 485 SENSOR_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit, 486 store_temp_crit, 1), 487 SENSOR_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL, 1), 488 SENSOR_ATTR(temp2_fault, S_IRUGO, show_status, NULL, 489 TMP401_STATUS_REMOTE_OPEN), 490 SENSOR_ATTR(temp2_min_alarm, S_IRUGO, show_status, NULL, 491 TMP401_STATUS_REMOTE_LOW), 492 SENSOR_ATTR(temp2_max_alarm, S_IRUGO, show_status, NULL, 493 TMP401_STATUS_REMOTE_HIGH), 494 SENSOR_ATTR(temp2_crit_alarm, S_IRUGO, show_status, NULL, 495 TMP401_STATUS_REMOTE_CRIT), 496}; 497 498/* 499 * Additional features of the TMP411 chip. 500 * The TMP411 stores the minimum and maximum 501 * temperature measured since power-on, chip-reset, or 502 * minimum and maximum register reset for both the local 503 * and remote channels. 504 */ 505static struct sensor_device_attribute tmp411_attr[] = { 506 SENSOR_ATTR(temp1_highest, S_IRUGO, show_temp_highest, NULL, 0), 507 SENSOR_ATTR(temp1_lowest, S_IRUGO, show_temp_lowest, NULL, 0), 508 SENSOR_ATTR(temp2_highest, S_IRUGO, show_temp_highest, NULL, 1), 509 SENSOR_ATTR(temp2_lowest, S_IRUGO, show_temp_lowest, NULL, 1), 510 SENSOR_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history, 0), 511}; 512 513/* 514 * Begin non sysfs callback code (aka Real code) 515 */ 516 517static void tmp401_init_client(struct i2c_client *client) 518{ 519 int config, config_orig; 520 521 /* Set the conversion rate to 2 Hz */ 522 i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5); 523 524 /* Start conversions (disable shutdown if necessary) */ 525 config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); 526 if (config < 0) { 527 dev_warn(&client->dev, "Initialization failed!\n"); 528 return; 529 } 530 531 config_orig = config; 532 config &= ~TMP401_CONFIG_SHUTDOWN; 533 534 if (config != config_orig) 535 i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config); 536} 537 538static int tmp401_detect(struct i2c_client *client, 539 struct i2c_board_info *info) 540{ 541 enum chips kind; 542 struct i2c_adapter *adapter = client->adapter; 543 u8 reg; 544 545 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 546 return -ENODEV; 547 548 /* Detect and identify the chip */ 549 reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG); 550 if (reg != TMP401_MANUFACTURER_ID) 551 return -ENODEV; 552 553 reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG); 554 555 switch (reg) { 556 case TMP401_DEVICE_ID: 557 kind = tmp401; 558 break; 559 case TMP411_DEVICE_ID: 560 kind = tmp411; 561 break; 562 default: 563 return -ENODEV; 564 } 565 566 reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ); 567 if (reg & 0x1b) 568 return -ENODEV; 569 570 reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ); 571 /* Datasheet says: 0x1-0x6 */ 572 if (reg > 15) 573 return -ENODEV; 574 575 strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE); 576 577 return 0; 578} 579 580static int tmp401_remove(struct i2c_client *client) 581{ 582 struct tmp401_data *data = i2c_get_clientdata(client); 583 int i; 584 585 if (data->hwmon_dev) 586 hwmon_device_unregister(data->hwmon_dev); 587 588 for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) 589 device_remove_file(&client->dev, &tmp401_attr[i].dev_attr); 590 591 if (data->kind == tmp411) { 592 for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) 593 device_remove_file(&client->dev, 594 &tmp411_attr[i].dev_attr); 595 } 596 597 kfree(data); 598 return 0; 599} 600 601static int tmp401_probe(struct i2c_client *client, 602 const struct i2c_device_id *id) 603{ 604 int i, err = 0; 605 struct tmp401_data *data; 606 const char *names[] = { "TMP401", "TMP411" }; 607 608 data = kzalloc(sizeof(struct tmp401_data), GFP_KERNEL); 609 if (!data) 610 return -ENOMEM; 611 612 i2c_set_clientdata(client, data); 613 mutex_init(&data->update_lock); 614 data->kind = id->driver_data; 615 616 /* Initialize the TMP401 chip */ 617 tmp401_init_client(client); 618 619 /* Register sysfs hooks */ 620 for (i = 0; i < ARRAY_SIZE(tmp401_attr); i++) { 621 err = device_create_file(&client->dev, 622 &tmp401_attr[i].dev_attr); 623 if (err) 624 goto exit_remove; 625 } 626 627 /* Register aditional tmp411 sysfs hooks */ 628 if (data->kind == tmp411) { 629 for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) { 630 err = device_create_file(&client->dev, 631 &tmp411_attr[i].dev_attr); 632 if (err) 633 goto exit_remove; 634 } 635 } 636 637 data->hwmon_dev = hwmon_device_register(&client->dev); 638 if (IS_ERR(data->hwmon_dev)) { 639 err = PTR_ERR(data->hwmon_dev); 640 data->hwmon_dev = NULL; 641 goto exit_remove; 642 } 643 644 dev_info(&client->dev, "Detected TI %s chip\n", names[data->kind]); 645 646 return 0; 647 648exit_remove: 649 tmp401_remove(client); /* will also free data for us */ 650 return err; 651} 652 653static struct i2c_driver tmp401_driver = { 654 .class = I2C_CLASS_HWMON, 655 .driver = { 656 .name = "tmp401", 657 }, 658 .probe = tmp401_probe, 659 .remove = tmp401_remove, 660 .id_table = tmp401_id, 661 .detect = tmp401_detect, 662 .address_list = normal_i2c, 663}; 664 665static int __init tmp401_init(void) 666{ 667 return i2c_add_driver(&tmp401_driver); 668} 669 670static void __exit tmp401_exit(void) 671{ 672 i2c_del_driver(&tmp401_driver); 673} 674 675MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 676MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver"); 677MODULE_LICENSE("GPL"); 678 679module_init(tmp401_init); 680module_exit(tmp401_exit); 681