1 /* 2 * emc6w201.c - Hardware monitoring driver for the SMSC EMC6W201 3 * Copyright (C) 2011 Jean Delvare <khali@linux-fr.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 20 #include <linux/module.h> 21 #include <linux/delay.h> 22 #include <linux/init.h> 23 #include <linux/slab.h> 24 #include <linux/jiffies.h> 25 #include <linux/i2c.h> 26 #include <linux/hwmon.h> 27 #include <linux/hwmon-sysfs.h> 28 #include <linux/err.h> 29 #include <linux/mutex.h> 30 31 /* 32 * Addresses to scan 33 */ 34 35 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 36 37 /* 38 * The EMC6W201 registers 39 */ 40 41 #define EMC6W201_REG_IN(nr) (0x20 + (nr)) 42 #define EMC6W201_REG_TEMP(nr) (0x26 + (nr)) 43 #define EMC6W201_REG_FAN(nr) (0x2C + (nr) * 2) 44 #define EMC6W201_REG_COMPANY 0x3E 45 #define EMC6W201_REG_VERSTEP 0x3F 46 #define EMC6W201_REG_CONFIG 0x40 47 #define EMC6W201_REG_IN_LOW(nr) (0x4A + (nr) * 2) 48 #define EMC6W201_REG_IN_HIGH(nr) (0x4B + (nr) * 2) 49 #define EMC6W201_REG_TEMP_LOW(nr) (0x56 + (nr) * 2) 50 #define EMC6W201_REG_TEMP_HIGH(nr) (0x57 + (nr) * 2) 51 #define EMC6W201_REG_FAN_MIN(nr) (0x62 + (nr) * 2) 52 53 enum { input, min, max } subfeature; 54 55 /* 56 * Per-device data 57 */ 58 59 struct emc6w201_data { 60 struct device *hwmon_dev; 61 struct mutex update_lock; 62 char valid; /* zero until following fields are valid */ 63 unsigned long last_updated; /* in jiffies */ 64 65 /* registers values */ 66 u8 in[3][6]; 67 s8 temp[3][6]; 68 u16 fan[2][5]; 69 }; 70 71 /* 72 * Combine LSB and MSB registers in a single value 73 * Locking: must be called with data->update_lock held 74 */ 75 static u16 emc6w201_read16(struct i2c_client *client, u8 reg) 76 { 77 int lsb, msb; 78 79 lsb = i2c_smbus_read_byte_data(client, reg); 80 msb = i2c_smbus_read_byte_data(client, reg + 1); 81 if (unlikely(lsb < 0 || msb < 0)) { 82 dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n", 83 16, "read", reg); 84 return 0xFFFF; /* Arbitrary value */ 85 } 86 87 return (msb << 8) | lsb; 88 } 89 90 /* 91 * Write 16-bit value to LSB and MSB registers 92 * Locking: must be called with data->update_lock held 93 */ 94 static int emc6w201_write16(struct i2c_client *client, u8 reg, u16 val) 95 { 96 int err; 97 98 err = i2c_smbus_write_byte_data(client, reg, val & 0xff); 99 if (likely(!err)) 100 err = i2c_smbus_write_byte_data(client, reg + 1, val >> 8); 101 if (unlikely(err < 0)) 102 dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n", 103 16, "write", reg); 104 105 return err; 106 } 107 108 /* Read 8-bit value from register */ 109 static u8 emc6w201_read8(struct i2c_client *client, u8 reg) 110 { 111 int val; 112 113 val = i2c_smbus_read_byte_data(client, reg); 114 if (unlikely(val < 0)) { 115 dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n", 116 8, "read", reg); 117 return 0x00; /* Arbitrary value */ 118 } 119 120 return val; 121 } 122 123 /* Write 8-bit value to register */ 124 static int emc6w201_write8(struct i2c_client *client, u8 reg, u8 val) 125 { 126 int err; 127 128 err = i2c_smbus_write_byte_data(client, reg, val); 129 if (unlikely(err < 0)) 130 dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n", 131 8, "write", reg); 132 133 return err; 134 } 135 136 static struct emc6w201_data *emc6w201_update_device(struct device *dev) 137 { 138 struct i2c_client *client = to_i2c_client(dev); 139 struct emc6w201_data *data = i2c_get_clientdata(client); 140 int nr; 141 142 mutex_lock(&data->update_lock); 143 144 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 145 for (nr = 0; nr < 6; nr++) { 146 data->in[input][nr] = 147 emc6w201_read8(client, 148 EMC6W201_REG_IN(nr)); 149 data->in[min][nr] = 150 emc6w201_read8(client, 151 EMC6W201_REG_IN_LOW(nr)); 152 data->in[max][nr] = 153 emc6w201_read8(client, 154 EMC6W201_REG_IN_HIGH(nr)); 155 } 156 157 for (nr = 0; nr < 6; nr++) { 158 data->temp[input][nr] = 159 emc6w201_read8(client, 160 EMC6W201_REG_TEMP(nr)); 161 data->temp[min][nr] = 162 emc6w201_read8(client, 163 EMC6W201_REG_TEMP_LOW(nr)); 164 data->temp[max][nr] = 165 emc6w201_read8(client, 166 EMC6W201_REG_TEMP_HIGH(nr)); 167 } 168 169 for (nr = 0; nr < 5; nr++) { 170 data->fan[input][nr] = 171 emc6w201_read16(client, 172 EMC6W201_REG_FAN(nr)); 173 data->fan[min][nr] = 174 emc6w201_read16(client, 175 EMC6W201_REG_FAN_MIN(nr)); 176 } 177 178 data->last_updated = jiffies; 179 data->valid = 1; 180 } 181 182 mutex_unlock(&data->update_lock); 183 184 return data; 185 } 186 187 /* 188 * Sysfs callback functions 189 */ 190 191 static const u16 nominal_mv[6] = { 2500, 1500, 3300, 5000, 1500, 1500 }; 192 193 static ssize_t show_in(struct device *dev, struct device_attribute *devattr, 194 char *buf) 195 { 196 struct emc6w201_data *data = emc6w201_update_device(dev); 197 int sf = to_sensor_dev_attr_2(devattr)->index; 198 int nr = to_sensor_dev_attr_2(devattr)->nr; 199 200 return sprintf(buf, "%u\n", 201 (unsigned)data->in[sf][nr] * nominal_mv[nr] / 0xC0); 202 } 203 204 static ssize_t set_in(struct device *dev, struct device_attribute *devattr, 205 const char *buf, size_t count) 206 { 207 struct i2c_client *client = to_i2c_client(dev); 208 struct emc6w201_data *data = i2c_get_clientdata(client); 209 int sf = to_sensor_dev_attr_2(devattr)->index; 210 int nr = to_sensor_dev_attr_2(devattr)->nr; 211 int err; 212 long val; 213 u8 reg; 214 215 err = kstrtol(buf, 10, &val); 216 if (err < 0) 217 return err; 218 219 val = DIV_ROUND_CLOSEST(val * 0xC0, nominal_mv[nr]); 220 reg = (sf == min) ? EMC6W201_REG_IN_LOW(nr) 221 : EMC6W201_REG_IN_HIGH(nr); 222 223 mutex_lock(&data->update_lock); 224 data->in[sf][nr] = SENSORS_LIMIT(val, 0, 255); 225 err = emc6w201_write8(client, reg, data->in[sf][nr]); 226 mutex_unlock(&data->update_lock); 227 228 return err < 0 ? err : count; 229 } 230 231 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, 232 char *buf) 233 { 234 struct emc6w201_data *data = emc6w201_update_device(dev); 235 int sf = to_sensor_dev_attr_2(devattr)->index; 236 int nr = to_sensor_dev_attr_2(devattr)->nr; 237 238 return sprintf(buf, "%d\n", (int)data->temp[sf][nr] * 1000); 239 } 240 241 static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, 242 const char *buf, size_t count) 243 { 244 struct i2c_client *client = to_i2c_client(dev); 245 struct emc6w201_data *data = i2c_get_clientdata(client); 246 int sf = to_sensor_dev_attr_2(devattr)->index; 247 int nr = to_sensor_dev_attr_2(devattr)->nr; 248 int err; 249 long val; 250 u8 reg; 251 252 err = kstrtol(buf, 10, &val); 253 if (err < 0) 254 return err; 255 256 val /= 1000; 257 reg = (sf == min) ? EMC6W201_REG_TEMP_LOW(nr) 258 : EMC6W201_REG_TEMP_HIGH(nr); 259 260 mutex_lock(&data->update_lock); 261 data->temp[sf][nr] = SENSORS_LIMIT(val, -127, 128); 262 err = emc6w201_write8(client, reg, data->temp[sf][nr]); 263 mutex_unlock(&data->update_lock); 264 265 return err < 0 ? err : count; 266 } 267 268 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 269 char *buf) 270 { 271 struct emc6w201_data *data = emc6w201_update_device(dev); 272 int sf = to_sensor_dev_attr_2(devattr)->index; 273 int nr = to_sensor_dev_attr_2(devattr)->nr; 274 unsigned rpm; 275 276 if (data->fan[sf][nr] == 0 || data->fan[sf][nr] == 0xFFFF) 277 rpm = 0; 278 else 279 rpm = 5400000U / data->fan[sf][nr]; 280 281 return sprintf(buf, "%u\n", rpm); 282 } 283 284 static ssize_t set_fan(struct device *dev, struct device_attribute *devattr, 285 const char *buf, size_t count) 286 { 287 struct i2c_client *client = to_i2c_client(dev); 288 struct emc6w201_data *data = i2c_get_clientdata(client); 289 int sf = to_sensor_dev_attr_2(devattr)->index; 290 int nr = to_sensor_dev_attr_2(devattr)->nr; 291 int err; 292 unsigned long val; 293 294 err = kstrtoul(buf, 10, &val); 295 if (err < 0) 296 return err; 297 298 if (val == 0) { 299 val = 0xFFFF; 300 } else { 301 val = DIV_ROUND_CLOSEST(5400000U, val); 302 val = SENSORS_LIMIT(val, 0, 0xFFFE); 303 } 304 305 mutex_lock(&data->update_lock); 306 data->fan[sf][nr] = val; 307 err = emc6w201_write16(client, EMC6W201_REG_FAN_MIN(nr), 308 data->fan[sf][nr]); 309 mutex_unlock(&data->update_lock); 310 311 return err < 0 ? err : count; 312 } 313 314 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, input); 315 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in, 316 0, min); 317 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in, 318 0, max); 319 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, input); 320 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in, 321 1, min); 322 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in, 323 1, max); 324 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, input); 325 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in, 326 2, min); 327 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in, 328 2, max); 329 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, input); 330 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in, 331 3, min); 332 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in, 333 3, max); 334 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, input); 335 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in, 336 4, min); 337 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in, 338 4, max); 339 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, input); 340 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in, 341 5, min); 342 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in, 343 5, max); 344 345 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, input); 346 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp, 347 0, min); 348 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp, 349 0, max); 350 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, input); 351 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp, 352 1, min); 353 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp, 354 1, max); 355 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, input); 356 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp, 357 2, min); 358 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp, 359 2, max); 360 static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 3, input); 361 static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp, set_temp, 362 3, min); 363 static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp, 364 3, max); 365 static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 4, input); 366 static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp, set_temp, 367 4, min); 368 static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp, 369 4, max); 370 static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 5, input); 371 static SENSOR_DEVICE_ATTR_2(temp6_min, S_IRUGO | S_IWUSR, show_temp, set_temp, 372 5, min); 373 static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp, 374 5, max); 375 376 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, input); 377 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan, 378 0, min); 379 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, input); 380 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan, 381 1, min); 382 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, input); 383 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan, 384 2, min); 385 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, input); 386 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan, 387 3, min); 388 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, input); 389 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan, 390 4, min); 391 392 static struct attribute *emc6w201_attributes[] = { 393 &sensor_dev_attr_in0_input.dev_attr.attr, 394 &sensor_dev_attr_in0_min.dev_attr.attr, 395 &sensor_dev_attr_in0_max.dev_attr.attr, 396 &sensor_dev_attr_in1_input.dev_attr.attr, 397 &sensor_dev_attr_in1_min.dev_attr.attr, 398 &sensor_dev_attr_in1_max.dev_attr.attr, 399 &sensor_dev_attr_in2_input.dev_attr.attr, 400 &sensor_dev_attr_in2_min.dev_attr.attr, 401 &sensor_dev_attr_in2_max.dev_attr.attr, 402 &sensor_dev_attr_in3_input.dev_attr.attr, 403 &sensor_dev_attr_in3_min.dev_attr.attr, 404 &sensor_dev_attr_in3_max.dev_attr.attr, 405 &sensor_dev_attr_in4_input.dev_attr.attr, 406 &sensor_dev_attr_in4_min.dev_attr.attr, 407 &sensor_dev_attr_in4_max.dev_attr.attr, 408 &sensor_dev_attr_in5_input.dev_attr.attr, 409 &sensor_dev_attr_in5_min.dev_attr.attr, 410 &sensor_dev_attr_in5_max.dev_attr.attr, 411 412 &sensor_dev_attr_temp1_input.dev_attr.attr, 413 &sensor_dev_attr_temp1_min.dev_attr.attr, 414 &sensor_dev_attr_temp1_max.dev_attr.attr, 415 &sensor_dev_attr_temp2_input.dev_attr.attr, 416 &sensor_dev_attr_temp2_min.dev_attr.attr, 417 &sensor_dev_attr_temp2_max.dev_attr.attr, 418 &sensor_dev_attr_temp3_input.dev_attr.attr, 419 &sensor_dev_attr_temp3_min.dev_attr.attr, 420 &sensor_dev_attr_temp3_max.dev_attr.attr, 421 &sensor_dev_attr_temp4_input.dev_attr.attr, 422 &sensor_dev_attr_temp4_min.dev_attr.attr, 423 &sensor_dev_attr_temp4_max.dev_attr.attr, 424 &sensor_dev_attr_temp5_input.dev_attr.attr, 425 &sensor_dev_attr_temp5_min.dev_attr.attr, 426 &sensor_dev_attr_temp5_max.dev_attr.attr, 427 &sensor_dev_attr_temp6_input.dev_attr.attr, 428 &sensor_dev_attr_temp6_min.dev_attr.attr, 429 &sensor_dev_attr_temp6_max.dev_attr.attr, 430 431 &sensor_dev_attr_fan1_input.dev_attr.attr, 432 &sensor_dev_attr_fan1_min.dev_attr.attr, 433 &sensor_dev_attr_fan2_input.dev_attr.attr, 434 &sensor_dev_attr_fan2_min.dev_attr.attr, 435 &sensor_dev_attr_fan3_input.dev_attr.attr, 436 &sensor_dev_attr_fan3_min.dev_attr.attr, 437 &sensor_dev_attr_fan4_input.dev_attr.attr, 438 &sensor_dev_attr_fan4_min.dev_attr.attr, 439 &sensor_dev_attr_fan5_input.dev_attr.attr, 440 &sensor_dev_attr_fan5_min.dev_attr.attr, 441 NULL 442 }; 443 444 static const struct attribute_group emc6w201_group = { 445 .attrs = emc6w201_attributes, 446 }; 447 448 /* 449 * Driver interface 450 */ 451 452 /* Return 0 if detection is successful, -ENODEV otherwise */ 453 static int emc6w201_detect(struct i2c_client *client, 454 struct i2c_board_info *info) 455 { 456 struct i2c_adapter *adapter = client->adapter; 457 int company, verstep, config; 458 459 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 460 return -ENODEV; 461 462 /* Identification */ 463 company = i2c_smbus_read_byte_data(client, EMC6W201_REG_COMPANY); 464 if (company != 0x5C) 465 return -ENODEV; 466 verstep = i2c_smbus_read_byte_data(client, EMC6W201_REG_VERSTEP); 467 if (verstep < 0 || (verstep & 0xF0) != 0xB0) 468 return -ENODEV; 469 if ((verstep & 0x0F) > 2) { 470 dev_dbg(&client->dev, "Unknwown EMC6W201 stepping %d\n", 471 verstep & 0x0F); 472 return -ENODEV; 473 } 474 475 /* Check configuration */ 476 config = i2c_smbus_read_byte_data(client, EMC6W201_REG_CONFIG); 477 if (config < 0 || (config & 0xF4) != 0x04) 478 return -ENODEV; 479 if (!(config & 0x01)) { 480 dev_err(&client->dev, "Monitoring not enabled\n"); 481 return -ENODEV; 482 } 483 484 strlcpy(info->type, "emc6w201", I2C_NAME_SIZE); 485 486 return 0; 487 } 488 489 static int emc6w201_probe(struct i2c_client *client, 490 const struct i2c_device_id *id) 491 { 492 struct emc6w201_data *data; 493 int err; 494 495 data = kzalloc(sizeof(struct emc6w201_data), GFP_KERNEL); 496 if (!data) { 497 err = -ENOMEM; 498 goto exit; 499 } 500 501 i2c_set_clientdata(client, data); 502 mutex_init(&data->update_lock); 503 504 /* Create sysfs attribute */ 505 err = sysfs_create_group(&client->dev.kobj, &emc6w201_group); 506 if (err) 507 goto exit_free; 508 509 /* Expose as a hwmon device */ 510 data->hwmon_dev = hwmon_device_register(&client->dev); 511 if (IS_ERR(data->hwmon_dev)) { 512 err = PTR_ERR(data->hwmon_dev); 513 goto exit_remove; 514 } 515 516 return 0; 517 518 exit_remove: 519 sysfs_remove_group(&client->dev.kobj, &emc6w201_group); 520 exit_free: 521 kfree(data); 522 exit: 523 return err; 524 } 525 526 static int emc6w201_remove(struct i2c_client *client) 527 { 528 struct emc6w201_data *data = i2c_get_clientdata(client); 529 530 hwmon_device_unregister(data->hwmon_dev); 531 sysfs_remove_group(&client->dev.kobj, &emc6w201_group); 532 kfree(data); 533 534 return 0; 535 } 536 537 static const struct i2c_device_id emc6w201_id[] = { 538 { "emc6w201", 0 }, 539 { } 540 }; 541 MODULE_DEVICE_TABLE(i2c, emc6w201_id); 542 543 static struct i2c_driver emc6w201_driver = { 544 .class = I2C_CLASS_HWMON, 545 .driver = { 546 .name = "emc6w201", 547 }, 548 .probe = emc6w201_probe, 549 .remove = emc6w201_remove, 550 .id_table = emc6w201_id, 551 .detect = emc6w201_detect, 552 .address_list = normal_i2c, 553 }; 554 555 static int __init sensors_emc6w201_init(void) 556 { 557 return i2c_add_driver(&emc6w201_driver); 558 } 559 module_init(sensors_emc6w201_init); 560 561 static void __exit sensors_emc6w201_exit(void) 562 { 563 i2c_del_driver(&emc6w201_driver); 564 } 565 module_exit(sensors_emc6w201_exit); 566 567 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 568 MODULE_DESCRIPTION("SMSC EMC6W201 hardware monitoring driver"); 569 MODULE_LICENSE("GPL"); 570