1 /* 2 * adm1025.c 3 * 4 * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> 5 * Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org> 6 * 7 * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 8 * voltages (including its own power source) and up to two temperatures 9 * (its own plus up to one external one). Voltages are scaled internally 10 * (which is not the common way) with ratios such that the nominal value 11 * of each voltage correspond to a register value of 192 (which means a 12 * resolution of about 0.5% of the nominal value). Temperature values are 13 * reported with a 1 deg resolution and a 3 deg accuracy. Complete 14 * datasheet can be obtained from Analog's website at: 15 * http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html 16 * 17 * This driver also supports the ADM1025A, which differs from the ADM1025 18 * only in that it has "open-drain VID inputs while the ADM1025 has 19 * on-chip 100k pull-ups on the VID inputs". It doesn't make any 20 * difference for us. 21 * 22 * This driver also supports the NE1619, a sensor chip made by Philips. 23 * That chip is similar to the ADM1025A, with a few differences. The only 24 * difference that matters to us is that the NE1619 has only two possible 25 * addresses while the ADM1025A has a third one. Complete datasheet can be 26 * obtained from Philips's website at: 27 * http://www.semiconductors.philips.com/pip/NE1619DS.html 28 * 29 * Since the ADM1025 was the first chipset supported by this driver, most 30 * comments will refer to this chipset, but are actually general and 31 * concern all supported chipsets, unless mentioned otherwise. 32 * 33 * This program is free software; you can redistribute it and/or modify 34 * it under the terms of the GNU General Public License as published by 35 * the Free Software Foundation; either version 2 of the License, or 36 * (at your option) any later version. 37 * 38 * This program is distributed in the hope that it will be useful, 39 * but WITHOUT ANY WARRANTY; without even the implied warranty of 40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 41 * GNU General Public License for more details. 42 * 43 * You should have received a copy of the GNU General Public License 44 * along with this program; if not, write to the Free Software 45 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 46 */ 47 48 #include <linux/module.h> 49 #include <linux/init.h> 50 #include <linux/slab.h> 51 #include <linux/jiffies.h> 52 #include <linux/i2c.h> 53 #include <linux/hwmon.h> 54 #include <linux/hwmon-sysfs.h> 55 #include <linux/hwmon-vid.h> 56 #include <linux/err.h> 57 #include <linux/mutex.h> 58 59 /* 60 * Addresses to scan 61 * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. 62 * NE1619 has two possible addresses: 0x2c and 0x2d. 63 */ 64 65 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 66 67 enum chips { adm1025, ne1619 }; 68 69 /* 70 * The ADM1025 registers 71 */ 72 73 #define ADM1025_REG_MAN_ID 0x3E 74 #define ADM1025_REG_CHIP_ID 0x3F 75 #define ADM1025_REG_CONFIG 0x40 76 #define ADM1025_REG_STATUS1 0x41 77 #define ADM1025_REG_STATUS2 0x42 78 #define ADM1025_REG_IN(nr) (0x20 + (nr)) 79 #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) 80 #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) 81 #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) 82 #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) 83 #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) 84 #define ADM1025_REG_VID 0x47 85 #define ADM1025_REG_VID4 0x49 86 87 /* 88 * Conversions and various macros 89 * The ADM1025 uses signed 8-bit values for temperatures. 90 */ 91 92 static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; 93 94 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 95 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 96 (val) * 192 >= (scale) * 255 ? 255 : \ 97 ((val) * 192 + (scale)/2) / (scale)) 98 99 #define TEMP_FROM_REG(reg) ((reg) * 1000) 100 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 101 (val) >= 126500 ? 127 : \ 102 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 103 104 /* 105 * Functions declaration 106 */ 107 108 static int adm1025_probe(struct i2c_client *client, 109 const struct i2c_device_id *id); 110 static int adm1025_detect(struct i2c_client *client, 111 struct i2c_board_info *info); 112 static void adm1025_init_client(struct i2c_client *client); 113 static int adm1025_remove(struct i2c_client *client); 114 static struct adm1025_data *adm1025_update_device(struct device *dev); 115 116 /* 117 * Driver data (common to all clients) 118 */ 119 120 static const struct i2c_device_id adm1025_id[] = { 121 { "adm1025", adm1025 }, 122 { "ne1619", ne1619 }, 123 { } 124 }; 125 MODULE_DEVICE_TABLE(i2c, adm1025_id); 126 127 static struct i2c_driver adm1025_driver = { 128 .class = I2C_CLASS_HWMON, 129 .driver = { 130 .name = "adm1025", 131 }, 132 .probe = adm1025_probe, 133 .remove = adm1025_remove, 134 .id_table = adm1025_id, 135 .detect = adm1025_detect, 136 .address_list = normal_i2c, 137 }; 138 139 /* 140 * Client data (each client gets its own) 141 */ 142 143 struct adm1025_data { 144 struct device *hwmon_dev; 145 struct mutex update_lock; 146 char valid; /* zero until following fields are valid */ 147 unsigned long last_updated; /* in jiffies */ 148 149 u8 in[6]; /* register value */ 150 u8 in_max[6]; /* register value */ 151 u8 in_min[6]; /* register value */ 152 s8 temp[2]; /* register value */ 153 s8 temp_min[2]; /* register value */ 154 s8 temp_max[2]; /* register value */ 155 u16 alarms; /* register values, combined */ 156 u8 vid; /* register values, combined */ 157 u8 vrm; 158 }; 159 160 /* 161 * Sysfs stuff 162 */ 163 164 static ssize_t 165 show_in(struct device *dev, struct device_attribute *attr, char *buf) 166 { 167 int index = to_sensor_dev_attr(attr)->index; 168 struct adm1025_data *data = adm1025_update_device(dev); 169 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], 170 in_scale[index])); 171 } 172 173 static ssize_t 174 show_in_min(struct device *dev, struct device_attribute *attr, char *buf) 175 { 176 int index = to_sensor_dev_attr(attr)->index; 177 struct adm1025_data *data = adm1025_update_device(dev); 178 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], 179 in_scale[index])); 180 } 181 182 static ssize_t 183 show_in_max(struct device *dev, struct device_attribute *attr, char *buf) 184 { 185 int index = to_sensor_dev_attr(attr)->index; 186 struct adm1025_data *data = adm1025_update_device(dev); 187 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], 188 in_scale[index])); 189 } 190 191 static ssize_t 192 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 193 { 194 int index = to_sensor_dev_attr(attr)->index; 195 struct adm1025_data *data = adm1025_update_device(dev); 196 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); 197 } 198 199 static ssize_t 200 show_temp_min(struct device *dev, struct device_attribute *attr, char *buf) 201 { 202 int index = to_sensor_dev_attr(attr)->index; 203 struct adm1025_data *data = adm1025_update_device(dev); 204 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); 205 } 206 207 static ssize_t 208 show_temp_max(struct device *dev, struct device_attribute *attr, char *buf) 209 { 210 int index = to_sensor_dev_attr(attr)->index; 211 struct adm1025_data *data = adm1025_update_device(dev); 212 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); 213 } 214 215 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 216 const char *buf, size_t count) 217 { 218 int index = to_sensor_dev_attr(attr)->index; 219 struct i2c_client *client = to_i2c_client(dev); 220 struct adm1025_data *data = i2c_get_clientdata(client); 221 long val = simple_strtol(buf, NULL, 10); 222 223 mutex_lock(&data->update_lock); 224 data->in_min[index] = IN_TO_REG(val, in_scale[index]); 225 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), 226 data->in_min[index]); 227 mutex_unlock(&data->update_lock); 228 return count; 229 } 230 231 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 232 const char *buf, size_t count) 233 { 234 int index = to_sensor_dev_attr(attr)->index; 235 struct i2c_client *client = to_i2c_client(dev); 236 struct adm1025_data *data = i2c_get_clientdata(client); 237 long val = simple_strtol(buf, NULL, 10); 238 239 mutex_lock(&data->update_lock); 240 data->in_max[index] = IN_TO_REG(val, in_scale[index]); 241 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), 242 data->in_max[index]); 243 mutex_unlock(&data->update_lock); 244 return count; 245 } 246 247 #define set_in(offset) \ 248 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 249 show_in, NULL, offset); \ 250 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ 251 show_in_min, set_in_min, offset); \ 252 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ 253 show_in_max, set_in_max, offset) 254 set_in(0); 255 set_in(1); 256 set_in(2); 257 set_in(3); 258 set_in(4); 259 set_in(5); 260 261 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 262 const char *buf, size_t count) 263 { 264 int index = to_sensor_dev_attr(attr)->index; 265 struct i2c_client *client = to_i2c_client(dev); 266 struct adm1025_data *data = i2c_get_clientdata(client); 267 long val = simple_strtol(buf, NULL, 10); 268 269 mutex_lock(&data->update_lock); 270 data->temp_min[index] = TEMP_TO_REG(val); 271 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), 272 data->temp_min[index]); 273 mutex_unlock(&data->update_lock); 274 return count; 275 } 276 277 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 278 const char *buf, size_t count) 279 { 280 int index = to_sensor_dev_attr(attr)->index; 281 struct i2c_client *client = to_i2c_client(dev); 282 struct adm1025_data *data = i2c_get_clientdata(client); 283 long val = simple_strtol(buf, NULL, 10); 284 285 mutex_lock(&data->update_lock); 286 data->temp_max[index] = TEMP_TO_REG(val); 287 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), 288 data->temp_max[index]); 289 mutex_unlock(&data->update_lock); 290 return count; 291 } 292 293 #define set_temp(offset) \ 294 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 295 show_temp, NULL, offset - 1); \ 296 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ 297 show_temp_min, set_temp_min, offset - 1); \ 298 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ 299 show_temp_max, set_temp_max, offset - 1) 300 set_temp(1); 301 set_temp(2); 302 303 static ssize_t 304 show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 305 { 306 struct adm1025_data *data = adm1025_update_device(dev); 307 return sprintf(buf, "%u\n", data->alarms); 308 } 309 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 310 311 static ssize_t 312 show_alarm(struct device *dev, struct device_attribute *attr, char *buf) 313 { 314 int bitnr = to_sensor_dev_attr(attr)->index; 315 struct adm1025_data *data = adm1025_update_device(dev); 316 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 317 } 318 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 319 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 320 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 321 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 322 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 323 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 324 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); 325 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); 326 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); 327 328 static ssize_t 329 show_vid(struct device *dev, struct device_attribute *attr, char *buf) 330 { 331 struct adm1025_data *data = adm1025_update_device(dev); 332 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 333 } 334 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 335 336 static ssize_t 337 show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 338 { 339 struct adm1025_data *data = dev_get_drvdata(dev); 340 return sprintf(buf, "%u\n", data->vrm); 341 } 342 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 343 const char *buf, size_t count) 344 { 345 struct adm1025_data *data = dev_get_drvdata(dev); 346 data->vrm = simple_strtoul(buf, NULL, 10); 347 return count; 348 } 349 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 350 351 /* 352 * Real code 353 */ 354 355 static struct attribute *adm1025_attributes[] = { 356 &sensor_dev_attr_in0_input.dev_attr.attr, 357 &sensor_dev_attr_in1_input.dev_attr.attr, 358 &sensor_dev_attr_in2_input.dev_attr.attr, 359 &sensor_dev_attr_in3_input.dev_attr.attr, 360 &sensor_dev_attr_in5_input.dev_attr.attr, 361 &sensor_dev_attr_in0_min.dev_attr.attr, 362 &sensor_dev_attr_in1_min.dev_attr.attr, 363 &sensor_dev_attr_in2_min.dev_attr.attr, 364 &sensor_dev_attr_in3_min.dev_attr.attr, 365 &sensor_dev_attr_in5_min.dev_attr.attr, 366 &sensor_dev_attr_in0_max.dev_attr.attr, 367 &sensor_dev_attr_in1_max.dev_attr.attr, 368 &sensor_dev_attr_in2_max.dev_attr.attr, 369 &sensor_dev_attr_in3_max.dev_attr.attr, 370 &sensor_dev_attr_in5_max.dev_attr.attr, 371 &sensor_dev_attr_in0_alarm.dev_attr.attr, 372 &sensor_dev_attr_in1_alarm.dev_attr.attr, 373 &sensor_dev_attr_in2_alarm.dev_attr.attr, 374 &sensor_dev_attr_in3_alarm.dev_attr.attr, 375 &sensor_dev_attr_in5_alarm.dev_attr.attr, 376 &sensor_dev_attr_temp1_input.dev_attr.attr, 377 &sensor_dev_attr_temp2_input.dev_attr.attr, 378 &sensor_dev_attr_temp1_min.dev_attr.attr, 379 &sensor_dev_attr_temp2_min.dev_attr.attr, 380 &sensor_dev_attr_temp1_max.dev_attr.attr, 381 &sensor_dev_attr_temp2_max.dev_attr.attr, 382 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 383 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 384 &sensor_dev_attr_temp1_fault.dev_attr.attr, 385 &dev_attr_alarms.attr, 386 &dev_attr_cpu0_vid.attr, 387 &dev_attr_vrm.attr, 388 NULL 389 }; 390 391 static const struct attribute_group adm1025_group = { 392 .attrs = adm1025_attributes, 393 }; 394 395 static struct attribute *adm1025_attributes_in4[] = { 396 &sensor_dev_attr_in4_input.dev_attr.attr, 397 &sensor_dev_attr_in4_min.dev_attr.attr, 398 &sensor_dev_attr_in4_max.dev_attr.attr, 399 &sensor_dev_attr_in4_alarm.dev_attr.attr, 400 NULL 401 }; 402 403 static const struct attribute_group adm1025_group_in4 = { 404 .attrs = adm1025_attributes_in4, 405 }; 406 407 /* Return 0 if detection is successful, -ENODEV otherwise */ 408 static int adm1025_detect(struct i2c_client *client, 409 struct i2c_board_info *info) 410 { 411 struct i2c_adapter *adapter = client->adapter; 412 const char *name; 413 u8 man_id, chip_id; 414 415 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 416 return -ENODEV; 417 418 /* Check for unused bits */ 419 if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80) 420 || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0) 421 || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) { 422 dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n", 423 client->addr); 424 return -ENODEV; 425 } 426 427 /* Identification */ 428 chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); 429 if ((chip_id & 0xF0) != 0x20) 430 return -ENODEV; 431 432 man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); 433 if (man_id == 0x41) 434 name = "adm1025"; 435 else if (man_id == 0xA1 && client->addr != 0x2E) 436 name = "ne1619"; 437 else 438 return -ENODEV; 439 440 strlcpy(info->type, name, I2C_NAME_SIZE); 441 442 return 0; 443 } 444 445 static int adm1025_probe(struct i2c_client *client, 446 const struct i2c_device_id *id) 447 { 448 struct adm1025_data *data; 449 int err; 450 u8 config; 451 452 data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL); 453 if (!data) { 454 err = -ENOMEM; 455 goto exit; 456 } 457 458 i2c_set_clientdata(client, data); 459 mutex_init(&data->update_lock); 460 461 /* Initialize the ADM1025 chip */ 462 adm1025_init_client(client); 463 464 /* Register sysfs hooks */ 465 if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group))) 466 goto exit_free; 467 468 /* Pin 11 is either in4 (+12V) or VID4 */ 469 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 470 if (!(config & 0x20)) { 471 if ((err = sysfs_create_group(&client->dev.kobj, 472 &adm1025_group_in4))) 473 goto exit_remove; 474 } 475 476 data->hwmon_dev = hwmon_device_register(&client->dev); 477 if (IS_ERR(data->hwmon_dev)) { 478 err = PTR_ERR(data->hwmon_dev); 479 goto exit_remove; 480 } 481 482 return 0; 483 484 exit_remove: 485 sysfs_remove_group(&client->dev.kobj, &adm1025_group); 486 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); 487 exit_free: 488 kfree(data); 489 exit: 490 return err; 491 } 492 493 static void adm1025_init_client(struct i2c_client *client) 494 { 495 u8 reg; 496 struct adm1025_data *data = i2c_get_clientdata(client); 497 int i; 498 499 data->vrm = vid_which_vrm(); 500 501 /* 502 * Set high limits 503 * Usually we avoid setting limits on driver init, but it happens 504 * that the ADM1025 comes with stupid default limits (all registers 505 * set to 0). In case the chip has not gone through any limit 506 * setting yet, we better set the high limits to the max so that 507 * no alarm triggers. 508 */ 509 for (i=0; i<6; i++) { 510 reg = i2c_smbus_read_byte_data(client, 511 ADM1025_REG_IN_MAX(i)); 512 if (reg == 0) 513 i2c_smbus_write_byte_data(client, 514 ADM1025_REG_IN_MAX(i), 515 0xFF); 516 } 517 for (i=0; i<2; i++) { 518 reg = i2c_smbus_read_byte_data(client, 519 ADM1025_REG_TEMP_HIGH(i)); 520 if (reg == 0) 521 i2c_smbus_write_byte_data(client, 522 ADM1025_REG_TEMP_HIGH(i), 523 0x7F); 524 } 525 526 /* 527 * Start the conversions 528 */ 529 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 530 if (!(reg & 0x01)) 531 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, 532 (reg&0x7E)|0x01); 533 } 534 535 static int adm1025_remove(struct i2c_client *client) 536 { 537 struct adm1025_data *data = i2c_get_clientdata(client); 538 539 hwmon_device_unregister(data->hwmon_dev); 540 sysfs_remove_group(&client->dev.kobj, &adm1025_group); 541 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); 542 543 kfree(data); 544 return 0; 545 } 546 547 static struct adm1025_data *adm1025_update_device(struct device *dev) 548 { 549 struct i2c_client *client = to_i2c_client(dev); 550 struct adm1025_data *data = i2c_get_clientdata(client); 551 552 mutex_lock(&data->update_lock); 553 554 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { 555 int i; 556 557 dev_dbg(&client->dev, "Updating data.\n"); 558 for (i=0; i<6; i++) { 559 data->in[i] = i2c_smbus_read_byte_data(client, 560 ADM1025_REG_IN(i)); 561 data->in_min[i] = i2c_smbus_read_byte_data(client, 562 ADM1025_REG_IN_MIN(i)); 563 data->in_max[i] = i2c_smbus_read_byte_data(client, 564 ADM1025_REG_IN_MAX(i)); 565 } 566 for (i=0; i<2; i++) { 567 data->temp[i] = i2c_smbus_read_byte_data(client, 568 ADM1025_REG_TEMP(i)); 569 data->temp_min[i] = i2c_smbus_read_byte_data(client, 570 ADM1025_REG_TEMP_LOW(i)); 571 data->temp_max[i] = i2c_smbus_read_byte_data(client, 572 ADM1025_REG_TEMP_HIGH(i)); 573 } 574 data->alarms = i2c_smbus_read_byte_data(client, 575 ADM1025_REG_STATUS1) 576 | (i2c_smbus_read_byte_data(client, 577 ADM1025_REG_STATUS2) << 8); 578 data->vid = (i2c_smbus_read_byte_data(client, 579 ADM1025_REG_VID) & 0x0f) 580 | ((i2c_smbus_read_byte_data(client, 581 ADM1025_REG_VID4) & 0x01) << 4); 582 583 data->last_updated = jiffies; 584 data->valid = 1; 585 } 586 587 mutex_unlock(&data->update_lock); 588 589 return data; 590 } 591 592 static int __init sensors_adm1025_init(void) 593 { 594 return i2c_add_driver(&adm1025_driver); 595 } 596 597 static void __exit sensors_adm1025_exit(void) 598 { 599 i2c_del_driver(&adm1025_driver); 600 } 601 602 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 603 MODULE_DESCRIPTION("ADM1025 driver"); 604 MODULE_LICENSE("GPL"); 605 606 module_init(sensors_adm1025_init); 607 module_exit(sensors_adm1025_exit); 608