drivers/hwmon/adm1025.c

   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-vid.h>
  55 #include <linux/err.h>
  56 #include <linux/mutex.h>
  57
  58 /*
  59  * Addresses to scan
  60  * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
  61  * NE1619 has two possible addresses: 0x2c and 0x2d.
  62  */
  63
  64 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  65
  66 /*
  67  * Insmod parameters
  68  */
  69
  70 I2C_CLIENT_INSMOD_2(adm1025, ne1619);
  71
  72 /*
  73  * The ADM1025 registers
  74  */
  75
  76 #define ADM1025_REG_MAN_ID              0x3E
  77 #define ADM1025_REG_CHIP_ID             0x3F
  78 #define ADM1025_REG_CONFIG              0x40
  79 #define ADM1025_REG_STATUS1             0x41
  80 #define ADM1025_REG_STATUS2             0x42
  81 #define ADM1025_REG_IN(nr)              (0x20 + (nr))
  82 #define ADM1025_REG_IN_MAX(nr)          (0x2B + (nr) * 2)
  83 #define ADM1025_REG_IN_MIN(nr)          (0x2C + (nr) * 2)
  84 #define ADM1025_REG_TEMP(nr)            (0x26 + (nr))
  85 #define ADM1025_REG_TEMP_HIGH(nr)       (0x37 + (nr) * 2)
  86 #define ADM1025_REG_TEMP_LOW(nr)        (0x38 + (nr) * 2)
  87 #define ADM1025_REG_VID                 0x47
  88 #define ADM1025_REG_VID4                0x49
  89
  90 /*
  91  * Conversions and various macros
  92  * The ADM1025 uses signed 8-bit values for temperatures.
  93  */
  94
  95 static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
  96
  97 #define IN_FROM_REG(reg,scale)  (((reg) * (scale) + 96) / 192)
  98 #define IN_TO_REG(val,scale)    ((val) <= 0 ? 0 : \
  99                                  (val) * 192 >= (scale) * 255 ? 255 : \
 100                                  ((val) * 192 + (scale)/2) / (scale))
 101
 102 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
 103 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
 104                                  (val) >= 126500 ? 127 : \
 105                                  (((val) < 0 ? (val)-500 : (val)+500) / 1000))
 106
 107 /*
 108  * Functions declaration
 109  */
 110
 111 static int adm1025_attach_adapter(struct i2c_adapter *adapter);
 112 static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
 113 static void adm1025_init_client(struct i2c_client *client);
 114 static int adm1025_detach_client(struct i2c_client *client);
 115 static struct adm1025_data *adm1025_update_device(struct device *dev);
 116
 117 /*
 118  * Driver data (common to all clients)
 119  */
 120
 121 static struct i2c_driver adm1025_driver = {
 122         .driver = {
 123                 .name   = "adm1025",
 124         },
 125         .id             = I2C_DRIVERID_ADM1025,
 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 class_device *class_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 #define show_in(offset) \
 157 static ssize_t show_in##offset(struct device *dev, struct device_attribute *attr, char *buf) \
 158 { \
 159         struct adm1025_data *data = adm1025_update_device(dev); \
 160         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
 161                        in_scale[offset])); \
 162 } \
 163 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
 164 { \
 165         struct adm1025_data *data = adm1025_update_device(dev); \
 166         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
 167                        in_scale[offset])); \
 168 } \
 169 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
 170 { \
 171         struct adm1025_data *data = adm1025_update_device(dev); \
 172         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
 173                        in_scale[offset])); \
 174 } \
 175 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);
 176 show_in(0);
 177 show_in(1);
 178 show_in(2);
 179 show_in(3);
 180 show_in(4);
 181 show_in(5);
 182
 183 #define show_temp(offset) \
 184 static ssize_t show_temp##offset(struct device *dev, struct device_attribute *attr, char *buf) \
 185 { \
 186         struct adm1025_data *data = adm1025_update_device(dev); \
 187         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
 188 } \
 189 static ssize_t show_temp##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
 190 { \
 191         struct adm1025_data *data = adm1025_update_device(dev); \
 192         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \
 193 } \
 194 static ssize_t show_temp##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
 195 { \
 196         struct adm1025_data *data = adm1025_update_device(dev); \
 197         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \
 198 }\
 199 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL);
 200 show_temp(1);
 201 show_temp(2);
 202
 203 #define set_in(offset) \
 204 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
 205         size_t count) \
 206 { \
 207         struct i2c_client *client = to_i2c_client(dev); \
 208         struct adm1025_data *data = i2c_get_clientdata(client); \
 209         long val = simple_strtol(buf, NULL, 10); \
 210  \
 211         mutex_lock(&data->update_lock); \
 212         data->in_min[offset] = IN_TO_REG(val, in_scale[offset]); \
 213         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \
 214                                   data->in_min[offset]); \
 215         mutex_unlock(&data->update_lock); \
 216         return count; \
 217 } \
 218 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
 219         size_t count) \
 220 { \
 221         struct i2c_client *client = to_i2c_client(dev); \
 222         struct adm1025_data *data = i2c_get_clientdata(client); \
 223         long val = simple_strtol(buf, NULL, 10); \
 224  \
 225         mutex_lock(&data->update_lock); \
 226         data->in_max[offset] = IN_TO_REG(val, in_scale[offset]); \
 227         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \
 228                                   data->in_max[offset]); \
 229         mutex_unlock(&data->update_lock); \
 230         return count; \
 231 } \
 232 static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
 233         show_in##offset##_min, set_in##offset##_min); \
 234 static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
 235         show_in##offset##_max, set_in##offset##_max);
 236 set_in(0);
 237 set_in(1);
 238 set_in(2);
 239 set_in(3);
 240 set_in(4);
 241 set_in(5);
 242
 243 #define set_temp(offset) \
 244 static ssize_t set_temp##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
 245         size_t count) \
 246 { \
 247         struct i2c_client *client = to_i2c_client(dev); \
 248         struct adm1025_data *data = i2c_get_clientdata(client); \
 249         long val = simple_strtol(buf, NULL, 10); \
 250  \
 251         mutex_lock(&data->update_lock); \
 252         data->temp_min[offset-1] = TEMP_TO_REG(val); \
 253         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \
 254                                   data->temp_min[offset-1]); \
 255         mutex_unlock(&data->update_lock); \
 256         return count; \
 257 } \
 258 static ssize_t set_temp##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
 259         size_t count) \
 260 { \
 261         struct i2c_client *client = to_i2c_client(dev); \
 262         struct adm1025_data *data = i2c_get_clientdata(client); \
 263         long val = simple_strtol(buf, NULL, 10); \
 264  \
 265         mutex_lock(&data->update_lock); \
 266         data->temp_max[offset-1] = TEMP_TO_REG(val); \
 267         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \
 268                                   data->temp_max[offset-1]); \
 269         mutex_unlock(&data->update_lock); \
 270         return count; \
 271 } \
 272 static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
 273         show_temp##offset##_min, set_temp##offset##_min); \
 274 static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
 275         show_temp##offset##_max, set_temp##offset##_max);
 276 set_temp(1);
 277 set_temp(2);
 278
 279 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 280 {
 281         struct adm1025_data *data = adm1025_update_device(dev);
 282         return sprintf(buf, "%u\n", data->alarms);
 283 }
 284 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 285
 286 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 287 {
 288         struct adm1025_data *data = adm1025_update_device(dev);
 289         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 290 }
 291 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 292
 293 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 294 {
 295         struct adm1025_data *data = adm1025_update_device(dev);
 296         return sprintf(buf, "%u\n", data->vrm);
 297 }
 298 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 299 {
 300         struct i2c_client *client = to_i2c_client(dev);
 301         struct adm1025_data *data = i2c_get_clientdata(client);
 302         data->vrm = simple_strtoul(buf, NULL, 10);
 303         return count;
 304 }
 305 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
 306
 307 /*
 308  * Real code
 309  */
 310
 311 static int adm1025_attach_adapter(struct i2c_adapter *adapter)
 312 {
 313         if (!(adapter->class & I2C_CLASS_HWMON))
 314                 return 0;
 315         return i2c_probe(adapter, &addr_data, adm1025_detect);
 316 }
 317
 318 /*
 319  * The following function does more than just detection. If detection
 320  * succeeds, it also registers the new chip.
 321  */
 322 static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
 323 {
 324         struct i2c_client *new_client;
 325         struct adm1025_data *data;
 326         int err = 0;
 327         const char *name = "";
 328         u8 config;
 329
 330         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 331                 goto exit;
 332
 333         if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
 334                 err = -ENOMEM;
 335                 goto exit;
 336         }
 337
 338         /* The common I2C client data is placed right before the
 339            ADM1025-specific data. */
 340         new_client = &data->client;
 341         i2c_set_clientdata(new_client, data);
 342         new_client->addr = address;
 343         new_client->adapter = adapter;
 344         new_client->driver = &adm1025_driver;
 345         new_client->flags = 0;
 346
 347         /*
 348          * Now we do the remaining detection. A negative kind means that
 349          * the driver was loaded with no force parameter (default), so we
 350          * must both detect and identify the chip. A zero kind means that
 351          * the driver was loaded with the force parameter, the detection
 352          * step shall be skipped. A positive kind means that the driver
 353          * was loaded with the force parameter and a given kind of chip is
 354          * requested, so both the detection and the identification steps
 355          * are skipped.
 356          */
 357         config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG);
 358         if (kind < 0) { /* detection */
 359                 if ((config & 0x80) != 0x00
 360                  || (i2c_smbus_read_byte_data(new_client,
 361                      ADM1025_REG_STATUS1) & 0xC0) != 0x00
 362                  || (i2c_smbus_read_byte_data(new_client,
 363                      ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
 364                         dev_dbg(&adapter->dev,
 365                                 "ADM1025 detection failed at 0x%02x.\n",
 366                                 address);
 367                         goto exit_free;
 368                 }
 369         }
 370
 371         if (kind <= 0) { /* identification */
 372                 u8 man_id, chip_id;
 373
 374                 man_id = i2c_smbus_read_byte_data(new_client,
 375                          ADM1025_REG_MAN_ID);
 376                 chip_id = i2c_smbus_read_byte_data(new_client,
 377                           ADM1025_REG_CHIP_ID);
 378
 379                 if (man_id == 0x41) { /* Analog Devices */
 380                         if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
 381                                 kind = adm1025;
 382                         }
 383                 } else
 384                 if (man_id == 0xA1) { /* Philips */
 385                         if (address != 0x2E
 386                          && (chip_id & 0xF0) == 0x20) { /* NE1619 */
 387                                 kind = ne1619;
 388                         }
 389                 }
 390
 391                 if (kind <= 0) { /* identification failed */
 392                         dev_info(&adapter->dev,
 393                             "Unsupported chip (man_id=0x%02X, "
 394                             "chip_id=0x%02X).\n", man_id, chip_id);
 395                         goto exit_free;
 396                 }
 397         }
 398
 399         if (kind == adm1025) {
 400                 name = "adm1025";
 401         } else if (kind == ne1619) {
 402                 name = "ne1619";
 403         }
 404
 405         /* We can fill in the remaining client fields */
 406         strlcpy(new_client->name, name, I2C_NAME_SIZE);
 407         data->valid = 0;
 408         mutex_init(&data->update_lock);
 409
 410         /* Tell the I2C layer a new client has arrived */
 411         if ((err = i2c_attach_client(new_client)))
 412                 goto exit_free;
 413
 414         /* Initialize the ADM1025 chip */
 415         adm1025_init_client(new_client);
 416
 417         /* Register sysfs hooks */
 418         data->class_dev = hwmon_device_register(&new_client->dev);
 419         if (IS_ERR(data->class_dev)) {
 420                 err = PTR_ERR(data->class_dev);
 421                 goto exit_detach;
 422         }
 423
 424         device_create_file(&new_client->dev, &dev_attr_in0_input);
 425         device_create_file(&new_client->dev, &dev_attr_in1_input);
 426         device_create_file(&new_client->dev, &dev_attr_in2_input);
 427         device_create_file(&new_client->dev, &dev_attr_in3_input);
 428         device_create_file(&new_client->dev, &dev_attr_in5_input);
 429         device_create_file(&new_client->dev, &dev_attr_in0_min);
 430         device_create_file(&new_client->dev, &dev_attr_in1_min);
 431         device_create_file(&new_client->dev, &dev_attr_in2_min);
 432         device_create_file(&new_client->dev, &dev_attr_in3_min);
 433         device_create_file(&new_client->dev, &dev_attr_in5_min);
 434         device_create_file(&new_client->dev, &dev_attr_in0_max);
 435         device_create_file(&new_client->dev, &dev_attr_in1_max);
 436         device_create_file(&new_client->dev, &dev_attr_in2_max);
 437         device_create_file(&new_client->dev, &dev_attr_in3_max);
 438         device_create_file(&new_client->dev, &dev_attr_in5_max);
 439         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 440         device_create_file(&new_client->dev, &dev_attr_temp2_input);
 441         device_create_file(&new_client->dev, &dev_attr_temp1_min);
 442         device_create_file(&new_client->dev, &dev_attr_temp2_min);
 443         device_create_file(&new_client->dev, &dev_attr_temp1_max);
 444         device_create_file(&new_client->dev, &dev_attr_temp2_max);
 445         device_create_file(&new_client->dev, &dev_attr_alarms);
 446         device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
 447         device_create_file(&new_client->dev, &dev_attr_vrm);
 448
 449         /* Pin 11 is either in4 (+12V) or VID4 */
 450         if (!(config & 0x20)) {
 451                 device_create_file(&new_client->dev, &dev_attr_in4_input);
 452                 device_create_file(&new_client->dev, &dev_attr_in4_min);
 453                 device_create_file(&new_client->dev, &dev_attr_in4_max);
 454         }
 455
 456         return 0;
 457
 458 exit_detach:
 459         i2c_detach_client(new_client);
 460 exit_free:
 461         kfree(data);
 462 exit:
 463         return err;
 464 }
 465
 466 static void adm1025_init_client(struct i2c_client *client)
 467 {
 468         u8 reg;
 469         struct adm1025_data *data = i2c_get_clientdata(client);
 470         int i;
 471
 472         data->vrm = vid_which_vrm();
 473
 474         /*
 475          * Set high limits
 476          * Usually we avoid setting limits on driver init, but it happens
 477          * that the ADM1025 comes with stupid default limits (all registers
 478          * set to 0). In case the chip has not gone through any limit
 479          * setting yet, we better set the high limits to the max so that
 480          * no alarm triggers.
 481          */
 482         for (i=0; i<6; i++) {
 483                 reg = i2c_smbus_read_byte_data(client,
 484                                                ADM1025_REG_IN_MAX(i));
 485                 if (reg == 0)
 486                         i2c_smbus_write_byte_data(client,
 487                                                   ADM1025_REG_IN_MAX(i),
 488                                                   0xFF);
 489         }
 490         for (i=0; i<2; i++) {
 491                 reg = i2c_smbus_read_byte_data(client,
 492                                                ADM1025_REG_TEMP_HIGH(i));
 493                 if (reg == 0)
 494                         i2c_smbus_write_byte_data(client,
 495                                                   ADM1025_REG_TEMP_HIGH(i),
 496                                                   0x7F);
 497         }
 498
 499         /*
 500          * Start the conversions
 501          */
 502         reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 503         if (!(reg & 0x01))
 504                 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
 505                                           (reg&0x7E)|0x01);
 506 }
 507
 508 static int adm1025_detach_client(struct i2c_client *client)
 509 {
 510         struct adm1025_data *data = i2c_get_clientdata(client);
 511         int err;
 512
 513         hwmon_device_unregister(data->class_dev);
 514
 515         if ((err = i2c_detach_client(client)))
 516                 return err;
 517
 518         kfree(data);
 519         return 0;
 520 }
 521
 522 static struct adm1025_data *adm1025_update_device(struct device *dev)
 523 {
 524         struct i2c_client *client = to_i2c_client(dev);
 525         struct adm1025_data *data = i2c_get_clientdata(client);
 526
 527         mutex_lock(&data->update_lock);
 528
 529         if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
 530                 int i;
 531
 532                 dev_dbg(&client->dev, "Updating data.\n");
 533                 for (i=0; i<6; i++) {
 534                         data->in[i] = i2c_smbus_read_byte_data(client,
 535                                       ADM1025_REG_IN(i));
 536                         data->in_min[i] = i2c_smbus_read_byte_data(client,
 537                                           ADM1025_REG_IN_MIN(i));
 538                         data->in_max[i] = i2c_smbus_read_byte_data(client,
 539                                           ADM1025_REG_IN_MAX(i));
 540                 }
 541                 for (i=0; i<2; i++) {
 542                         data->temp[i] = i2c_smbus_read_byte_data(client,
 543                                         ADM1025_REG_TEMP(i));
 544                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 545                                             ADM1025_REG_TEMP_LOW(i));
 546                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 547                                             ADM1025_REG_TEMP_HIGH(i));
 548                 }
 549                 data->alarms = i2c_smbus_read_byte_data(client,
 550                                ADM1025_REG_STATUS1)
 551                              | (i2c_smbus_read_byte_data(client,
 552                                 ADM1025_REG_STATUS2) << 8);
 553                 data->vid = (i2c_smbus_read_byte_data(client,
 554                              ADM1025_REG_VID) & 0x0f)
 555                           | ((i2c_smbus_read_byte_data(client,
 556                               ADM1025_REG_VID4) & 0x01) << 4);
 557
 558                 data->last_updated = jiffies;
 559                 data->valid = 1;
 560         }
 561
 562         mutex_unlock(&data->update_lock);
 563
 564         return data;
 565 }
 566
 567 static int __init sensors_adm1025_init(void)
 568 {
 569         return i2c_add_driver(&adm1025_driver);
 570 }
 571
 572 static void __exit sensors_adm1025_exit(void)
 573 {
 574         i2c_del_driver(&adm1025_driver);
 575 }
 576
 577 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 578 MODULE_DESCRIPTION("ADM1025 driver");
 579 MODULE_LICENSE("GPL");
 580
 581 module_init(sensors_adm1025_init);
 582 module_exit(sensors_adm1025_exit);