1 /* 2 * adm1025.c 3 * 4 * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> 5 * Copyright (C) 2003-2004 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_attach_adapter(struct i2c_adapter *adapter); 113 static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind); 114 static void adm1025_init_client(struct i2c_client *client); 115 static int adm1025_detach_client(struct i2c_client *client); 116 static struct adm1025_data *adm1025_update_device(struct device *dev); 117 118 /* 119 * Driver data (common to all clients) 120 */ 121 122 static struct i2c_driver adm1025_driver = { 123 .driver = { 124 .name = "adm1025", 125 }, 126 .attach_adapter = adm1025_attach_adapter, 127 .detach_client = adm1025_detach_client, 128 }; 129 130 /* 131 * Client data (each client gets its own) 132 */ 133 134 struct adm1025_data { 135 struct i2c_client client; 136 struct device *hwmon_dev; 137 struct mutex update_lock; 138 char valid; /* zero until following fields are valid */ 139 unsigned long last_updated; /* in jiffies */ 140 141 u8 in[6]; /* register value */ 142 u8 in_max[6]; /* register value */ 143 u8 in_min[6]; /* register value */ 144 s8 temp[2]; /* register value */ 145 s8 temp_min[2]; /* register value */ 146 s8 temp_max[2]; /* register value */ 147 u16 alarms; /* register values, combined */ 148 u8 vid; /* register values, combined */ 149 u8 vrm; 150 }; 151 152 /* 153 * Sysfs stuff 154 */ 155 156 static ssize_t 157 show_in(struct device *dev, struct device_attribute *attr, char *buf) 158 { 159 int index = to_sensor_dev_attr(attr)->index; 160 struct adm1025_data *data = adm1025_update_device(dev); 161 return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], 162 in_scale[index])); 163 } 164 165 static ssize_t 166 show_in_min(struct device *dev, struct device_attribute *attr, char *buf) 167 { 168 int index = to_sensor_dev_attr(attr)->index; 169 struct adm1025_data *data = adm1025_update_device(dev); 170 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], 171 in_scale[index])); 172 } 173 174 static ssize_t 175 show_in_max(struct device *dev, struct device_attribute *attr, char *buf) 176 { 177 int index = to_sensor_dev_attr(attr)->index; 178 struct adm1025_data *data = adm1025_update_device(dev); 179 return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], 180 in_scale[index])); 181 } 182 183 static ssize_t 184 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 185 { 186 int index = to_sensor_dev_attr(attr)->index; 187 struct adm1025_data *data = adm1025_update_device(dev); 188 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); 189 } 190 191 static ssize_t 192 show_temp_min(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_min[index])); 197 } 198 199 static ssize_t 200 show_temp_max(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_max[index])); 205 } 206 207 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, 208 const char *buf, size_t count) 209 { 210 int index = to_sensor_dev_attr(attr)->index; 211 struct i2c_client *client = to_i2c_client(dev); 212 struct adm1025_data *data = i2c_get_clientdata(client); 213 long val = simple_strtol(buf, NULL, 10); 214 215 mutex_lock(&data->update_lock); 216 data->in_min[index] = IN_TO_REG(val, in_scale[index]); 217 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), 218 data->in_min[index]); 219 mutex_unlock(&data->update_lock); 220 return count; 221 } 222 223 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, 224 const char *buf, size_t count) 225 { 226 int index = to_sensor_dev_attr(attr)->index; 227 struct i2c_client *client = to_i2c_client(dev); 228 struct adm1025_data *data = i2c_get_clientdata(client); 229 long val = simple_strtol(buf, NULL, 10); 230 231 mutex_lock(&data->update_lock); 232 data->in_max[index] = IN_TO_REG(val, in_scale[index]); 233 i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), 234 data->in_max[index]); 235 mutex_unlock(&data->update_lock); 236 return count; 237 } 238 239 #define set_in(offset) \ 240 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ 241 show_in, NULL, offset); \ 242 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ 243 show_in_min, set_in_min, offset); \ 244 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ 245 show_in_max, set_in_max, offset) 246 set_in(0); 247 set_in(1); 248 set_in(2); 249 set_in(3); 250 set_in(4); 251 set_in(5); 252 253 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, 254 const char *buf, size_t count) 255 { 256 int index = to_sensor_dev_attr(attr)->index; 257 struct i2c_client *client = to_i2c_client(dev); 258 struct adm1025_data *data = i2c_get_clientdata(client); 259 long val = simple_strtol(buf, NULL, 10); 260 261 mutex_lock(&data->update_lock); 262 data->temp_min[index] = TEMP_TO_REG(val); 263 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), 264 data->temp_min[index]); 265 mutex_unlock(&data->update_lock); 266 return count; 267 } 268 269 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, 270 const char *buf, size_t count) 271 { 272 int index = to_sensor_dev_attr(attr)->index; 273 struct i2c_client *client = to_i2c_client(dev); 274 struct adm1025_data *data = i2c_get_clientdata(client); 275 long val = simple_strtol(buf, NULL, 10); 276 277 mutex_lock(&data->update_lock); 278 data->temp_max[index] = TEMP_TO_REG(val); 279 i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), 280 data->temp_max[index]); 281 mutex_unlock(&data->update_lock); 282 return count; 283 } 284 285 #define set_temp(offset) \ 286 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ 287 show_temp, NULL, offset - 1); \ 288 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ 289 show_temp_min, set_temp_min, offset - 1); \ 290 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ 291 show_temp_max, set_temp_max, offset - 1) 292 set_temp(1); 293 set_temp(2); 294 295 static ssize_t 296 show_alarms(struct device *dev, struct device_attribute *attr, char *buf) 297 { 298 struct adm1025_data *data = adm1025_update_device(dev); 299 return sprintf(buf, "%u\n", data->alarms); 300 } 301 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 302 303 static ssize_t 304 show_alarm(struct device *dev, struct device_attribute *attr, char *buf) 305 { 306 int bitnr = to_sensor_dev_attr(attr)->index; 307 struct adm1025_data *data = adm1025_update_device(dev); 308 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 309 } 310 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); 311 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); 312 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); 313 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); 314 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); 315 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); 316 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); 317 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); 318 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); 319 320 static ssize_t 321 show_vid(struct device *dev, struct device_attribute *attr, char *buf) 322 { 323 struct adm1025_data *data = adm1025_update_device(dev); 324 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); 325 } 326 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); 327 328 static ssize_t 329 show_vrm(struct device *dev, struct device_attribute *attr, char *buf) 330 { 331 struct adm1025_data *data = dev_get_drvdata(dev); 332 return sprintf(buf, "%u\n", data->vrm); 333 } 334 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, 335 const char *buf, size_t count) 336 { 337 struct adm1025_data *data = dev_get_drvdata(dev); 338 data->vrm = simple_strtoul(buf, NULL, 10); 339 return count; 340 } 341 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); 342 343 /* 344 * Real code 345 */ 346 347 static int adm1025_attach_adapter(struct i2c_adapter *adapter) 348 { 349 if (!(adapter->class & I2C_CLASS_HWMON)) 350 return 0; 351 return i2c_probe(adapter, &addr_data, adm1025_detect); 352 } 353 354 static struct attribute *adm1025_attributes[] = { 355 &sensor_dev_attr_in0_input.dev_attr.attr, 356 &sensor_dev_attr_in1_input.dev_attr.attr, 357 &sensor_dev_attr_in2_input.dev_attr.attr, 358 &sensor_dev_attr_in3_input.dev_attr.attr, 359 &sensor_dev_attr_in5_input.dev_attr.attr, 360 &sensor_dev_attr_in0_min.dev_attr.attr, 361 &sensor_dev_attr_in1_min.dev_attr.attr, 362 &sensor_dev_attr_in2_min.dev_attr.attr, 363 &sensor_dev_attr_in3_min.dev_attr.attr, 364 &sensor_dev_attr_in5_min.dev_attr.attr, 365 &sensor_dev_attr_in0_max.dev_attr.attr, 366 &sensor_dev_attr_in1_max.dev_attr.attr, 367 &sensor_dev_attr_in2_max.dev_attr.attr, 368 &sensor_dev_attr_in3_max.dev_attr.attr, 369 &sensor_dev_attr_in5_max.dev_attr.attr, 370 &sensor_dev_attr_in0_alarm.dev_attr.attr, 371 &sensor_dev_attr_in1_alarm.dev_attr.attr, 372 &sensor_dev_attr_in2_alarm.dev_attr.attr, 373 &sensor_dev_attr_in3_alarm.dev_attr.attr, 374 &sensor_dev_attr_in5_alarm.dev_attr.attr, 375 &sensor_dev_attr_temp1_input.dev_attr.attr, 376 &sensor_dev_attr_temp2_input.dev_attr.attr, 377 &sensor_dev_attr_temp1_min.dev_attr.attr, 378 &sensor_dev_attr_temp2_min.dev_attr.attr, 379 &sensor_dev_attr_temp1_max.dev_attr.attr, 380 &sensor_dev_attr_temp2_max.dev_attr.attr, 381 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 382 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 383 &sensor_dev_attr_temp1_fault.dev_attr.attr, 384 &dev_attr_alarms.attr, 385 &dev_attr_cpu0_vid.attr, 386 &dev_attr_vrm.attr, 387 NULL 388 }; 389 390 static const struct attribute_group adm1025_group = { 391 .attrs = adm1025_attributes, 392 }; 393 394 static struct attribute *adm1025_attributes_in4[] = { 395 &sensor_dev_attr_in4_input.dev_attr.attr, 396 &sensor_dev_attr_in4_min.dev_attr.attr, 397 &sensor_dev_attr_in4_max.dev_attr.attr, 398 &sensor_dev_attr_in4_alarm.dev_attr.attr, 399 NULL 400 }; 401 402 static const struct attribute_group adm1025_group_in4 = { 403 .attrs = adm1025_attributes_in4, 404 }; 405 406 /* 407 * The following function does more than just detection. If detection 408 * succeeds, it also registers the new chip. 409 */ 410 static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) 411 { 412 struct i2c_client *client; 413 struct adm1025_data *data; 414 int err = 0; 415 const char *name = ""; 416 u8 config; 417 418 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 419 goto exit; 420 421 if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) { 422 err = -ENOMEM; 423 goto exit; 424 } 425 426 client = &data->client; 427 i2c_set_clientdata(client, data); 428 client->addr = address; 429 client->adapter = adapter; 430 client->driver = &adm1025_driver; 431 432 /* 433 * Now we do the remaining detection. A negative kind means that 434 * the driver was loaded with no force parameter (default), so we 435 * must both detect and identify the chip. A zero kind means that 436 * the driver was loaded with the force parameter, the detection 437 * step shall be skipped. A positive kind means that the driver 438 * was loaded with the force parameter and a given kind of chip is 439 * requested, so both the detection and the identification steps 440 * are skipped. 441 */ 442 config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 443 if (kind < 0) { /* detection */ 444 if ((config & 0x80) != 0x00 445 || (i2c_smbus_read_byte_data(client, 446 ADM1025_REG_STATUS1) & 0xC0) != 0x00 447 || (i2c_smbus_read_byte_data(client, 448 ADM1025_REG_STATUS2) & 0xBC) != 0x00) { 449 dev_dbg(&adapter->dev, 450 "ADM1025 detection failed at 0x%02x.\n", 451 address); 452 goto exit_free; 453 } 454 } 455 456 if (kind <= 0) { /* identification */ 457 u8 man_id, chip_id; 458 459 man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); 460 chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); 461 462 if (man_id == 0x41) { /* Analog Devices */ 463 if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */ 464 kind = adm1025; 465 } 466 } else 467 if (man_id == 0xA1) { /* Philips */ 468 if (address != 0x2E 469 && (chip_id & 0xF0) == 0x20) { /* NE1619 */ 470 kind = ne1619; 471 } 472 } 473 474 if (kind <= 0) { /* identification failed */ 475 dev_info(&adapter->dev, 476 "Unsupported chip (man_id=0x%02X, " 477 "chip_id=0x%02X).\n", man_id, chip_id); 478 goto exit_free; 479 } 480 } 481 482 if (kind == adm1025) { 483 name = "adm1025"; 484 } else if (kind == ne1619) { 485 name = "ne1619"; 486 } 487 488 /* We can fill in the remaining client fields */ 489 strlcpy(client->name, name, I2C_NAME_SIZE); 490 mutex_init(&data->update_lock); 491 492 /* Tell the I2C layer a new client has arrived */ 493 if ((err = i2c_attach_client(client))) 494 goto exit_free; 495 496 /* Initialize the ADM1025 chip */ 497 adm1025_init_client(client); 498 499 /* Register sysfs hooks */ 500 if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group))) 501 goto exit_detach; 502 503 /* Pin 11 is either in4 (+12V) or VID4 */ 504 if (!(config & 0x20)) { 505 if ((err = sysfs_create_group(&client->dev.kobj, 506 &adm1025_group_in4))) 507 goto exit_remove; 508 } 509 510 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, &adm1025_group); 520 sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); 521 exit_detach: 522 i2c_detach_client(client); 523 exit_free: 524 kfree(data); 525 exit: 526 return err; 527 } 528 529 static void adm1025_init_client(struct i2c_client *client) 530 { 531 u8 reg; 532 struct adm1025_data *data = i2c_get_clientdata(client); 533 int i; 534 535 data->vrm = vid_which_vrm(); 536 537 /* 538 * Set high limits 539 * Usually we avoid setting limits on driver init, but it happens 540 * that the ADM1025 comes with stupid default limits (all registers 541 * set to 0). In case the chip has not gone through any limit 542 * setting yet, we better set the high limits to the max so that 543 * no alarm triggers. 544 */ 545 for (i=0; i<6; i++) { 546 reg = i2c_smbus_read_byte_data(client, 547 ADM1025_REG_IN_MAX(i)); 548 if (reg == 0) 549 i2c_smbus_write_byte_data(client, 550 ADM1025_REG_IN_MAX(i), 551 0xFF); 552 } 553 for (i=0; i<2; i++) { 554 reg = i2c_smbus_read_byte_data(client, 555 ADM1025_REG_TEMP_HIGH(i)); 556 if (reg == 0) 557 i2c_smbus_write_byte_data(client, 558 ADM1025_REG_TEMP_HIGH(i), 559 0x7F); 560 } 561 562 /* 563 * Start the conversions 564 */ 565 reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); 566 if (!(reg & 0x01)) 567 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, 568 (reg&0x7E)|0x01); 569 } 570 571 static int adm1025_detach_client(struct i2c_client *client) 572 { 573 struct adm1025_data *data = i2c_get_clientdata(client); 574 int err; 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 if ((err = i2c_detach_client(client))) 581 return err; 582 583 kfree(data); 584 return 0; 585 } 586 587 static struct adm1025_data *adm1025_update_device(struct device *dev) 588 { 589 struct i2c_client *client = to_i2c_client(dev); 590 struct adm1025_data *data = i2c_get_clientdata(client); 591 592 mutex_lock(&data->update_lock); 593 594 if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { 595 int i; 596 597 dev_dbg(&client->dev, "Updating data.\n"); 598 for (i=0; i<6; i++) { 599 data->in[i] = i2c_smbus_read_byte_data(client, 600 ADM1025_REG_IN(i)); 601 data->in_min[i] = i2c_smbus_read_byte_data(client, 602 ADM1025_REG_IN_MIN(i)); 603 data->in_max[i] = i2c_smbus_read_byte_data(client, 604 ADM1025_REG_IN_MAX(i)); 605 } 606 for (i=0; i<2; i++) { 607 data->temp[i] = i2c_smbus_read_byte_data(client, 608 ADM1025_REG_TEMP(i)); 609 data->temp_min[i] = i2c_smbus_read_byte_data(client, 610 ADM1025_REG_TEMP_LOW(i)); 611 data->temp_max[i] = i2c_smbus_read_byte_data(client, 612 ADM1025_REG_TEMP_HIGH(i)); 613 } 614 data->alarms = i2c_smbus_read_byte_data(client, 615 ADM1025_REG_STATUS1) 616 | (i2c_smbus_read_byte_data(client, 617 ADM1025_REG_STATUS2) << 8); 618 data->vid = (i2c_smbus_read_byte_data(client, 619 ADM1025_REG_VID) & 0x0f) 620 | ((i2c_smbus_read_byte_data(client, 621 ADM1025_REG_VID4) & 0x01) << 4); 622 623 data->last_updated = jiffies; 624 data->valid = 1; 625 } 626 627 mutex_unlock(&data->update_lock); 628 629 return data; 630 } 631 632 static int __init sensors_adm1025_init(void) 633 { 634 return i2c_add_driver(&adm1025_driver); 635 } 636 637 static void __exit sensors_adm1025_exit(void) 638 { 639 i2c_del_driver(&adm1025_driver); 640 } 641 642 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 643 MODULE_DESCRIPTION("ADM1025 driver"); 644 MODULE_LICENSE("GPL"); 645 646 module_init(sensors_adm1025_init); 647 module_exit(sensors_adm1025_exit); 648