1 /* 2 * adm1025.c 3 * 4 * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> 5 * Copyright (C) 2003-2008 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 /* 68 * Insmod parameters 69 */ 70 71 I2C_CLIENT_INSMOD_2(adm1025, ne1619); 72 73 /* 74 * The ADM1025 registers 75 */ 76 77 #define ADM1025_REG_MAN_ID 0x3E 78 #define ADM1025_REG_CHIP_ID 0x3F 79 #define ADM1025_REG_CONFIG 0x40 80 #define ADM1025_REG_STATUS1 0x41 81 #define ADM1025_REG_STATUS2 0x42 82 #define ADM1025_REG_IN(nr) (0x20 + (nr)) 83 #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) 84 #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) 85 #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) 86 #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) 87 #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) 88 #define ADM1025_REG_VID 0x47 89 #define ADM1025_REG_VID4 0x49 90 91 /* 92 * Conversions and various macros 93 * The ADM1025 uses signed 8-bit values for temperatures. 94 */ 95 96 static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; 97 98 #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) 99 #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ 100 (val) * 192 >= (scale) * 255 ? 255 : \ 101 ((val) * 192 + (scale)/2) / (scale)) 102 103 #define TEMP_FROM_REG(reg) ((reg) * 1000) 104 #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ 105 (val) >= 126500 ? 127 : \ 106 (((val) < 0 ? (val)-500 : (val)+500) / 1000)) 107 108 /* 109 * Functions declaration 110 */ 111 112 static int adm1025_probe(struct i2c_client *client, 113 const struct i2c_device_id *id); 114 static int adm1025_detect(struct i2c_client *client, int kind, 115 struct i2c_board_info *info); 116 static void adm1025_init_client(struct i2c_client *client); 117 static int adm1025_remove(struct i2c_client *client); 118 static struct adm1025_data *adm1025_update_device(struct device *dev); 119 120 /* 121 * Driver data (common to all clients) 122 */ 123 124 static const struct i2c_device_id adm1025_id[] = { 125 { "adm1025", adm1025 }, 126 { "ne1619", ne1619 }, 127 { } 128 }; 129 MODULE_DEVICE_TABLE(i2c, adm1025_id); 130 131 static struct i2c_driver adm1025_driver = { 132 .class = I2C_CLASS_HWMON, 133 .driver = { 134 .name = "adm1025", 135 }, 136 .probe = adm1025_probe, 137 .remove = adm1025_remove, 138 .id_table = adm1025_id, 139 .detect = adm1025_detect, 140 .address_data = &addr_data, 141 }; 142 143 /* 144 * Client data (each client gets its own) 145 */ 146 147 struct adm1025_data { 148 struct device *hwmon_dev; 149 struct mutex update_lock; 150 char valid; /* zero until following fields are valid */ 151 unsigned long last_updated; /* in jiffies */ 152 153 u8 in[6]; /* register value */ 154 u8 in_max[6]; /* register value */ 155 u8 in_min[6]; /* register value */ 156 s8 temp[2]; /* register value */ 157 s8 temp_min[2]; /* register value */ 158 s8 temp_max[2]; /* register value */ 159 u16 alarms; /* register values, combined */ 160 u8 vid; /* register values, combined */ 161 u8 vrm; 162 }; 163 164 /* 165 * Sysfs stuff 166 */ 167 168 static ssize_t 169 show_in(struct device *dev, struct device_attribute *attr, char *buf) 170 { 171 int index = to_sensor_dev_attr(attr)->index; 172 struct adm1025_data *data = adm1025_update_device(dev); 173 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], 174 in_scale[index])); 175 } 176 177 static ssize_t 178 show_in_min(struct device *dev, struct device_attribute *attr, char *buf) 179 { 180 int index = to_sensor_dev_attr(attr)->index; 181 struct adm1025_data *data = adm1025_update_device(dev); 182 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], 183 in_scale[index])); 184 } 185 186 static ssize_t 187 show_in_max(struct device *dev, struct device_attribute *attr, char *buf) 188 { 189 int index = to_sensor_dev_attr(attr)->index; 190 struct adm1025_data *data = adm1025_update_device(dev); 191 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], 192 in_scale[index])); 193 } 194 195 static ssize_t 196 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 197 { 198 int index = to_sensor_dev_attr(attr)->index; 199 struct adm1025_data *data = adm1025_update_device(dev); 200 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); 201 } 202 203 static ssize_t 204 show_temp_min(struct device *dev, struct device_attribute *attr, char *buf) 205 { 206 int index = to_sensor_dev_attr(attr)->index; 207 struct adm1025_data *data = adm1025_update_device(dev); 208 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); 209 } 210 211 static ssize_t 212 show_temp_max(struct device *dev, struct device_attribute *attr, char *buf) 213 { 214 int index = to_sensor_dev_attr(attr)->index; 215 struct adm1025_data *data = adm1025_update_device(dev); 216 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); 217 } 218 219 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 220 const char *buf, size_t count) 221 { 222 int index = to_sensor_dev_attr(attr)->index; 223 struct i2c_client *client = to_i2c_client(dev); 224 struct adm1025_data *data = i2c_get_clientdata(client); 225 long val = simple_strtol(buf, NULL, 10); 226 227 mutex_lock(&data->update_lock); 228 data->in_min[index] = IN_TO_REG(val, in_scale[index]); 229 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), 230 data->in_min[index]); 231 mutex_unlock(&data->update_lock); 232 return count; 233 } 234 235 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 236 const char *buf, size_t count) 237 { 238 int index = to_sensor_dev_attr(attr)->index; 239 struct i2c_client *client = to_i2c_client(dev); 240 struct adm1025_data *data = i2c_get_clientdata(client); 241 long val = simple_strtol(buf, NULL, 10); 242 243 mutex_lock(&data->update_lock); 244 data->in_max[index] = IN_TO_REG(val, in_scale[index]); 245 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), 246 data->in_max[index]); 247 mutex_unlock(&data->update_lock); 248 return count; 249 } 250 251 #define set_in(offset) \ 252 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 253 show_in, NULL, offset); \ 254 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ 255 show_in_min, set_in_min, offset); \ 256 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ 257 show_in_max, set_in_max, offset) 258 set_in(0); 259 set_in(1); 260 set_in(2); 261 set_in(3); 262 set_in(4); 263 set_in(5); 264 265 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 266 const char *buf, size_t count) 267 { 268 int index = to_sensor_dev_attr(attr)->index; 269 struct i2c_client *client = to_i2c_client(dev); 270 struct adm1025_data *data = i2c_get_clientdata(client); 271 long val = simple_strtol(buf, NULL, 10); 272 273 mutex_lock(&data->update_lock); 274 data->temp_min[index] = TEMP_TO_REG(val); 275 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), 276 data->temp_min[index]); 277 mutex_unlock(&data->update_lock); 278 return count; 279 } 280 281 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 282 const char *buf, size_t count) 283 { 284 int index = to_sensor_dev_attr(attr)->index; 285 struct i2c_client *client = to_i2c_client(dev); 286 struct adm1025_data *data = i2c_get_clientdata(client); 287 long val = simple_strtol(buf, NULL, 10); 288 289 mutex_lock(&data->update_lock); 290 data->temp_max[index] = TEMP_TO_REG(val); 291 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), 292 data->temp_max[index]); 293 mutex_unlock(&data->update_lock); 294 return count; 295 } 296 297 #define set_temp(offset) \ 298 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 299 show_temp, NULL, offset - 1); \ 300 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ 301 show_temp_min, set_temp_min, offset - 1); \ 302 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ 303 show_temp_max, set_temp_max, offset - 1) 304 set_temp(1); 305 set_temp(2); 306 307 static ssize_t 308 show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 309 { 310 struct adm1025_data *data = adm1025_update_device(dev); 311 return sprintf(buf, "%u\n", data->alarms); 312 } 313 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 314 315 static ssize_t 316 show_alarm(struct device *dev, struct device_attribute *attr, char *buf) 317 { 318 int bitnr = to_sensor_dev_attr(attr)->index; 319 struct adm1025_data *data = adm1025_update_device(dev); 320 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 321 } 322 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 323 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 324 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 325 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 326 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 327 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 328 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); 329 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); 330 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); 331 332 static ssize_t 333 show_vid(struct device *dev, struct device_attribute *attr, char *buf) 334 { 335 struct adm1025_data *data = adm1025_update_device(dev); 336 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 337 } 338 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 339 340 static ssize_t 341 show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 342 { 343 struct adm1025_data *data = dev_get_drvdata(dev); 344 return sprintf(buf, "%u\n", data->vrm); 345 } 346 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 347 const char *buf, size_t count) 348 { 349 struct adm1025_data *data = dev_get_drvdata(dev); 350 data->vrm = simple_strtoul(buf, NULL, 10); 351 return count; 352 } 353 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 354 355 /* 356 * Real code 357 */ 358 359 static struct attribute *adm1025_attributes[] = { 360 &sensor_dev_attr_in0_input.dev_attr.attr, 361 &sensor_dev_attr_in1_input.dev_attr.attr, 362 &sensor_dev_attr_in2_input.dev_attr.attr, 363 &sensor_dev_attr_in3_input.dev_attr.attr, 364 &sensor_dev_attr_in5_input.dev_attr.attr, 365 &sensor_dev_attr_in0_min.dev_attr.attr, 366 &sensor_dev_attr_in1_min.dev_attr.attr, 367 &sensor_dev_attr_in2_min.dev_attr.attr, 368 &sensor_dev_attr_in3_min.dev_attr.attr, 369 &sensor_dev_attr_in5_min.dev_attr.attr, 370 &sensor_dev_attr_in0_max.dev_attr.attr, 371 &sensor_dev_attr_in1_max.dev_attr.attr, 372 &sensor_dev_attr_in2_max.dev_attr.attr, 373 &sensor_dev_attr_in3_max.dev_attr.attr, 374 &sensor_dev_attr_in5_max.dev_attr.attr, 375 &sensor_dev_attr_in0_alarm.dev_attr.attr, 376 &sensor_dev_attr_in1_alarm.dev_attr.attr, 377 &sensor_dev_attr_in2_alarm.dev_attr.attr, 378 &sensor_dev_attr_in3_alarm.dev_attr.attr, 379 &sensor_dev_attr_in5_alarm.dev_attr.attr, 380 &sensor_dev_attr_temp1_input.dev_attr.attr, 381 &sensor_dev_attr_temp2_input.dev_attr.attr, 382 &sensor_dev_attr_temp1_min.dev_attr.attr, 383 &sensor_dev_attr_temp2_min.dev_attr.attr, 384 &sensor_dev_attr_temp1_max.dev_attr.attr, 385 &sensor_dev_attr_temp2_max.dev_attr.attr, 386 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 387 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 388 &sensor_dev_attr_temp1_fault.dev_attr.attr, 389 &dev_attr_alarms.attr, 390 &dev_attr_cpu0_vid.attr, 391 &dev_attr_vrm.attr, 392 NULL 393 }; 394 395 static const struct attribute_group adm1025_group = { 396 .attrs = adm1025_attributes, 397 }; 398 399 static struct attribute *adm1025_attributes_in4[] = { 400 &sensor_dev_attr_in4_input.dev_attr.attr, 401 &sensor_dev_attr_in4_min.dev_attr.attr, 402 &sensor_dev_attr_in4_max.dev_attr.attr, 403 &sensor_dev_attr_in4_alarm.dev_attr.attr, 404 NULL 405 }; 406 407 static const struct attribute_group adm1025_group_in4 = { 408 .attrs = adm1025_attributes_in4, 409 }; 410 411 /* Return 0 if detection is successful, -ENODEV otherwise */ 412 static int adm1025_detect(struct i2c_client *client, int kind, 413 struct i2c_board_info *info) 414 { 415 struct i2c_adapter *adapter = client->adapter; 416 const char *name = ""; 417 u8 config; 418 419 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 420 return -ENODEV; 421 422 /* 423 * Now we do the remaining detection. A negative kind means that 424 * the driver was loaded with no force parameter (default), so we 425 * must both detect and identify the chip. A zero kind means that 426 * the driver was loaded with the force parameter, the detection 427 * step shall be skipped. A positive kind means that the driver 428 * was loaded with the force parameter and a given kind of chip is 429 * requested, so both the detection and the identification steps 430 * are skipped. 431 */ 432 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 433 if (kind < 0) { /* detection */ 434 if ((config & 0x80) != 0x00 435 || (i2c_smbus_read_byte_data(client, 436 ADM1025_REG_STATUS1) & 0xC0) != 0x00 437 || (i2c_smbus_read_byte_data(client, 438 ADM1025_REG_STATUS2) & 0xBC) != 0x00) { 439 dev_dbg(&adapter->dev, 440 "ADM1025 detection failed at 0x%02x.\n", 441 client->addr); 442 return -ENODEV; 443 } 444 } 445 446 if (kind <= 0) { /* identification */ 447 u8 man_id, chip_id; 448 449 man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); 450 chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); 451 452 if (man_id == 0x41) { /* Analog Devices */ 453 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */ 454 kind = adm1025; 455 } 456 } else 457 if (man_id == 0xA1) { /* Philips */ 458 if (client->addr != 0x2E 459 && (chip_id & 0xF0) == 0x20) { /* NE1619 */ 460 kind = ne1619; 461 } 462 } 463 464 if (kind <= 0) { /* identification failed */ 465 dev_info(&adapter->dev, 466 "Unsupported chip (man_id=0x%02X, " 467 "chip_id=0x%02X).\n", man_id, chip_id); 468 return -ENODEV; 469 } 470 } 471 472 if (kind == adm1025) { 473 name = "adm1025"; 474 } else if (kind == ne1619) { 475 name = "ne1619"; 476 } 477 strlcpy(info->type, name, I2C_NAME_SIZE); 478 479 return 0; 480 } 481 482 static int adm1025_probe(struct i2c_client *client, 483 const struct i2c_device_id *id) 484 { 485 struct adm1025_data *data; 486 int err; 487 u8 config; 488 489 data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL); 490 if (!data) { 491 err = -ENOMEM; 492 goto exit; 493 } 494 495 i2c_set_clientdata(client, data); 496 mutex_init(&data->update_lock); 497 498 /* Initialize the ADM1025 chip */ 499 adm1025_init_client(client); 500 501 /* Register sysfs hooks */ 502 if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group))) 503 goto exit_free; 504 505 /* Pin 11 is either in4 (+12V) or VID4 */ 506 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 507 if (!(config & 0x20)) { 508 if ((err = sysfs_create_group(&client->dev.kobj, 509 &adm1025_group_in4))) 510 goto exit_remove; 511 } 512 513 data->hwmon_dev = hwmon_device_register(&client->dev); 514 if (IS_ERR(data->hwmon_dev)) { 515 err = PTR_ERR(data->hwmon_dev); 516 goto exit_remove; 517 } 518 519 return 0; 520 521 exit_remove: 522 sysfs_remove_group(&client->dev.kobj, &adm1025_group); 523 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); 524 exit_free: 525 kfree(data); 526 exit: 527 return err; 528 } 529 530 static void adm1025_init_client(struct i2c_client *client) 531 { 532 u8 reg; 533 struct adm1025_data *data = i2c_get_clientdata(client); 534 int i; 535 536 data->vrm = vid_which_vrm(); 537 538 /* 539 * Set high limits 540 * Usually we avoid setting limits on driver init, but it happens 541 * that the ADM1025 comes with stupid default limits (all registers 542 * set to 0). In case the chip has not gone through any limit 543 * setting yet, we better set the high limits to the max so that 544 * no alarm triggers. 545 */ 546 for (i=0; i<6; i++) { 547 reg = i2c_smbus_read_byte_data(client, 548 ADM1025_REG_IN_MAX(i)); 549 if (reg == 0) 550 i2c_smbus_write_byte_data(client, 551 ADM1025_REG_IN_MAX(i), 552 0xFF); 553 } 554 for (i=0; i<2; i++) { 555 reg = i2c_smbus_read_byte_data(client, 556 ADM1025_REG_TEMP_HIGH(i)); 557 if (reg == 0) 558 i2c_smbus_write_byte_data(client, 559 ADM1025_REG_TEMP_HIGH(i), 560 0x7F); 561 } 562 563 /* 564 * Start the conversions 565 */ 566 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 567 if (!(reg & 0x01)) 568 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, 569 (reg&0x7E)|0x01); 570 } 571 572 static int adm1025_remove(struct i2c_client *client) 573 { 574 struct adm1025_data *data = i2c_get_clientdata(client); 575 576 hwmon_device_unregister(data->hwmon_dev); 577 sysfs_remove_group(&client->dev.kobj, &adm1025_group); 578 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); 579 580 kfree(data); 581 return 0; 582 } 583 584 static struct adm1025_data *adm1025_update_device(struct device *dev) 585 { 586 struct i2c_client *client = to_i2c_client(dev); 587 struct adm1025_data *data = i2c_get_clientdata(client); 588 589 mutex_lock(&data->update_lock); 590 591 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { 592 int i; 593 594 dev_dbg(&client->dev, "Updating data.\n"); 595 for (i=0; i<6; i++) { 596 data->in[i] = i2c_smbus_read_byte_data(client, 597 ADM1025_REG_IN(i)); 598 data->in_min[i] = i2c_smbus_read_byte_data(client, 599 ADM1025_REG_IN_MIN(i)); 600 data->in_max[i] = i2c_smbus_read_byte_data(client, 601 ADM1025_REG_IN_MAX(i)); 602 } 603 for (i=0; i<2; i++) { 604 data->temp[i] = i2c_smbus_read_byte_data(client, 605 ADM1025_REG_TEMP(i)); 606 data->temp_min[i] = i2c_smbus_read_byte_data(client, 607 ADM1025_REG_TEMP_LOW(i)); 608 data->temp_max[i] = i2c_smbus_read_byte_data(client, 609 ADM1025_REG_TEMP_HIGH(i)); 610 } 611 data->alarms = i2c_smbus_read_byte_data(client, 612 ADM1025_REG_STATUS1) 613 | (i2c_smbus_read_byte_data(client, 614 ADM1025_REG_STATUS2) << 8); 615 data->vid = (i2c_smbus_read_byte_data(client, 616 ADM1025_REG_VID) & 0x0f) 617 | ((i2c_smbus_read_byte_data(client, 618 ADM1025_REG_VID4) & 0x01) << 4); 619 620 data->last_updated = jiffies; 621 data->valid = 1; 622 } 623 624 mutex_unlock(&data->update_lock); 625 626 return data; 627 } 628 629 static int __init sensors_adm1025_init(void) 630 { 631 return i2c_add_driver(&adm1025_driver); 632 } 633 634 static void __exit sensors_adm1025_exit(void) 635 { 636 i2c_del_driver(&adm1025_driver); 637 } 638 639 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 640 MODULE_DESCRIPTION("ADM1025 driver"); 641 MODULE_LICENSE("GPL"); 642 643 module_init(sensors_adm1025_init); 644 module_exit(sensors_adm1025_exit); 645