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
  57 /*
  58  * Addresses to scan
  59  * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e.
  60  * NE1619 has two possible addresses: 0x2c and 0x2d.
  61  */
  62
  63 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  64
  65 /*
  66  * Insmod parameters
  67  */
  68
  69 I2C_CLIENT_INSMOD_2(adm1025, ne1619);
  70
  71 /*
  72  * The ADM1025 registers
  73  */
  74
  75 #define ADM1025_REG_MAN_ID              0x3E
  76 #define ADM1025_REG_CHIP_ID             0x3F
  77 #define ADM1025_REG_CONFIG              0x40
  78 #define ADM1025_REG_STATUS1             0x41
  79 #define ADM1025_REG_STATUS2             0x42
  80 #define ADM1025_REG_IN(nr)              (0x20 + (nr))
  81 #define ADM1025_REG_IN_MAX(nr)          (0x2B + (nr) * 2)
  82 #define ADM1025_REG_IN_MIN(nr)          (0x2C + (nr) * 2)
  83 #define ADM1025_REG_TEMP(nr)            (0x26 + (nr))
  84 #define ADM1025_REG_TEMP_HIGH(nr)       (0x37 + (nr) * 2)
  85 #define ADM1025_REG_TEMP_LOW(nr)        (0x38 + (nr) * 2)
  86 #define ADM1025_REG_VID                 0x47
  87 #define ADM1025_REG_VID4                0x49
  88
  89 /*
  90  * Conversions and various macros
  91  * The ADM1025 uses signed 8-bit values for temperatures.
  92  */
  93
  94 static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
  95
  96 #define IN_FROM_REG(reg,scale)  (((reg) * (scale) + 96) / 192)
  97 #define IN_TO_REG(val,scale)    ((val) <= 0 ? 0 : \
  98                                  (val) * 192 >= (scale) * 255 ? 255 : \
  99                                  ((val) * 192 + (scale)/2) / (scale))
 100
 101 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
 102 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
 103                                  (val) >= 126500 ? 127 : \
 104                                  (((val) < 0 ? (val)-500 : (val)+500) / 1000))
 105
 106 /*
 107  * Functions declaration
 108  */
 109
 110 static int adm1025_attach_adapter(struct i2c_adapter *adapter);
 111 static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind);
 112 static void adm1025_init_client(struct i2c_client *client);
 113 static int adm1025_detach_client(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 struct i2c_driver adm1025_driver = {
 121         .driver = {
 122                 .name   = "adm1025",
 123         },
 124         .id             = I2C_DRIVERID_ADM1025,
 125         .attach_adapter = adm1025_attach_adapter,
 126         .detach_client  = adm1025_detach_client,
 127 };
 128
 129 /*
 130  * Client data (each client gets its own)
 131  */
 132
 133 struct adm1025_data {
 134         struct i2c_client client;
 135         struct class_device *class_dev;
 136         struct semaphore update_lock;
 137         char valid; /* zero until following fields are valid */
 138         unsigned long last_updated; /* in jiffies */
 139
 140         u8 in[6];               /* register value */
 141         u8 in_max[6];           /* register value */
 142         u8 in_min[6];           /* register value */
 143         s8 temp[2];             /* register value */
 144         s8 temp_min[2];         /* register value */
 145         s8 temp_max[2];         /* register value */
 146         u16 alarms;             /* register values, combined */
 147         u8 vid;                 /* register values, combined */
 148         u8 vrm;
 149 };
 150
 151 /*
 152  * Sysfs stuff
 153  */
 154
 155 #define show_in(offset) \
 156 static ssize_t show_in##offset(struct device *dev, struct device_attribute *attr, char *buf) \
 157 { \
 158         struct adm1025_data *data = adm1025_update_device(dev); \
 159         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \
 160                        in_scale[offset])); \
 161 } \
 162 static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
 163 { \
 164         struct adm1025_data *data = adm1025_update_device(dev); \
 165         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \
 166                        in_scale[offset])); \
 167 } \
 168 static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
 169 { \
 170         struct adm1025_data *data = adm1025_update_device(dev); \
 171         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \
 172                        in_scale[offset])); \
 173 } \
 174 static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL);
 175 show_in(0);
 176 show_in(1);
 177 show_in(2);
 178 show_in(3);
 179 show_in(4);
 180 show_in(5);
 181
 182 #define show_temp(offset) \
 183 static ssize_t show_temp##offset(struct device *dev, struct device_attribute *attr, char *buf) \
 184 { \
 185         struct adm1025_data *data = adm1025_update_device(dev); \
 186         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \
 187 } \
 188 static ssize_t show_temp##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
 189 { \
 190         struct adm1025_data *data = adm1025_update_device(dev); \
 191         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \
 192 } \
 193 static ssize_t show_temp##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \
 194 { \
 195         struct adm1025_data *data = adm1025_update_device(dev); \
 196         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \
 197 }\
 198 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL);
 199 show_temp(1);
 200 show_temp(2);
 201
 202 #define set_in(offset) \
 203 static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
 204         size_t count) \
 205 { \
 206         struct i2c_client *client = to_i2c_client(dev); \
 207         struct adm1025_data *data = i2c_get_clientdata(client); \
 208         long val = simple_strtol(buf, NULL, 10); \
 209  \
 210         down(&data->update_lock); \
 211         data->in_min[offset] = IN_TO_REG(val, in_scale[offset]); \
 212         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \
 213                                   data->in_min[offset]); \
 214         up(&data->update_lock); \
 215         return count; \
 216 } \
 217 static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
 218         size_t count) \
 219 { \
 220         struct i2c_client *client = to_i2c_client(dev); \
 221         struct adm1025_data *data = i2c_get_clientdata(client); \
 222         long val = simple_strtol(buf, NULL, 10); \
 223  \
 224         down(&data->update_lock); \
 225         data->in_max[offset] = IN_TO_REG(val, in_scale[offset]); \
 226         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \
 227                                   data->in_max[offset]); \
 228         up(&data->update_lock); \
 229         return count; \
 230 } \
 231 static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
 232         show_in##offset##_min, set_in##offset##_min); \
 233 static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
 234         show_in##offset##_max, set_in##offset##_max);
 235 set_in(0);
 236 set_in(1);
 237 set_in(2);
 238 set_in(3);
 239 set_in(4);
 240 set_in(5);
 241
 242 #define set_temp(offset) \
 243 static ssize_t set_temp##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
 244         size_t count) \
 245 { \
 246         struct i2c_client *client = to_i2c_client(dev); \
 247         struct adm1025_data *data = i2c_get_clientdata(client); \
 248         long val = simple_strtol(buf, NULL, 10); \
 249  \
 250         down(&data->update_lock); \
 251         data->temp_min[offset-1] = TEMP_TO_REG(val); \
 252         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \
 253                                   data->temp_min[offset-1]); \
 254         up(&data->update_lock); \
 255         return count; \
 256 } \
 257 static ssize_t set_temp##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \
 258         size_t count) \
 259 { \
 260         struct i2c_client *client = to_i2c_client(dev); \
 261         struct adm1025_data *data = i2c_get_clientdata(client); \
 262         long val = simple_strtol(buf, NULL, 10); \
 263  \
 264         down(&data->update_lock); \
 265         data->temp_max[offset-1] = TEMP_TO_REG(val); \
 266         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \
 267                                   data->temp_max[offset-1]); \
 268         up(&data->update_lock); \
 269         return count; \
 270 } \
 271 static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
 272         show_temp##offset##_min, set_temp##offset##_min); \
 273 static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
 274         show_temp##offset##_max, set_temp##offset##_max);
 275 set_temp(1);
 276 set_temp(2);
 277
 278 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 279 {
 280         struct adm1025_data *data = adm1025_update_device(dev);
 281         return sprintf(buf, "%u\n", data->alarms);
 282 }
 283 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 284
 285 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 286 {
 287         struct adm1025_data *data = adm1025_update_device(dev);
 288         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 289 }
 290 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 291
 292 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 293 {
 294         struct adm1025_data *data = adm1025_update_device(dev);
 295         return sprintf(buf, "%u\n", data->vrm);
 296 }
 297 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 298 {
 299         struct i2c_client *client = to_i2c_client(dev);
 300         struct adm1025_data *data = i2c_get_clientdata(client);
 301         data->vrm = simple_strtoul(buf, NULL, 10);
 302         return count;
 303 }
 304 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
 305
 306 /*
 307  * Real code
 308  */
 309
 310 static int adm1025_attach_adapter(struct i2c_adapter *adapter)
 311 {
 312         if (!(adapter->class & I2C_CLASS_HWMON))
 313                 return 0;
 314         return i2c_probe(adapter, &addr_data, adm1025_detect);
 315 }
 316
 317 /*
 318  * The following function does more than just detection. If detection
 319  * succeeds, it also registers the new chip.
 320  */
 321 static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind)
 322 {
 323         struct i2c_client *new_client;
 324         struct adm1025_data *data;
 325         int err = 0;
 326         const char *name = "";
 327         u8 config;
 328
 329         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 330                 goto exit;
 331
 332         if (!(data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL))) {
 333                 err = -ENOMEM;
 334                 goto exit;
 335         }
 336
 337         /* The common I2C client data is placed right before the
 338            ADM1025-specific data. */
 339         new_client = &data->client;
 340         i2c_set_clientdata(new_client, data);
 341         new_client->addr = address;
 342         new_client->adapter = adapter;
 343         new_client->driver = &adm1025_driver;
 344         new_client->flags = 0;
 345
 346         /*
 347          * Now we do the remaining detection. A negative kind means that
 348          * the driver was loaded with no force parameter (default), so we
 349          * must both detect and identify the chip. A zero kind means that
 350          * the driver was loaded with the force parameter, the detection
 351          * step shall be skipped. A positive kind means that the driver
 352          * was loaded with the force parameter and a given kind of chip is
 353          * requested, so both the detection and the identification steps
 354          * are skipped.
 355          */
 356         config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG);
 357         if (kind < 0) { /* detection */
 358                 if ((config & 0x80) != 0x00
 359                  || (i2c_smbus_read_byte_data(new_client,
 360                      ADM1025_REG_STATUS1) & 0xC0) != 0x00
 361                  || (i2c_smbus_read_byte_data(new_client,
 362                      ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
 363                         dev_dbg(&adapter->dev,
 364                                 "ADM1025 detection failed at 0x%02x.\n",
 365                                 address);
 366                         goto exit_free;
 367                 }
 368         }
 369
 370         if (kind <= 0) { /* identification */
 371                 u8 man_id, chip_id;
 372
 373                 man_id = i2c_smbus_read_byte_data(new_client,
 374                          ADM1025_REG_MAN_ID);
 375                 chip_id = i2c_smbus_read_byte_data(new_client,
 376                           ADM1025_REG_CHIP_ID);
 377
 378                 if (man_id == 0x41) { /* Analog Devices */
 379                         if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
 380                                 kind = adm1025;
 381                         }
 382                 } else
 383                 if (man_id == 0xA1) { /* Philips */
 384                         if (address != 0x2E
 385                          && (chip_id & 0xF0) == 0x20) { /* NE1619 */
 386                                 kind = ne1619;
 387                         }
 388                 }
 389
 390                 if (kind <= 0) { /* identification failed */
 391                         dev_info(&adapter->dev,
 392                             "Unsupported chip (man_id=0x%02X, "
 393                             "chip_id=0x%02X).\n", man_id, chip_id);
 394                         goto exit_free;
 395                 }
 396         }
 397
 398         if (kind == adm1025) {
 399                 name = "adm1025";
 400         } else if (kind == ne1619) {
 401                 name = "ne1619";
 402         }
 403
 404         /* We can fill in the remaining client fields */
 405         strlcpy(new_client->name, name, I2C_NAME_SIZE);
 406         data->valid = 0;
 407         init_MUTEX(&data->update_lock);
 408
 409         /* Tell the I2C layer a new client has arrived */
 410         if ((err = i2c_attach_client(new_client)))
 411                 goto exit_free;
 412
 413         /* Initialize the ADM1025 chip */
 414         adm1025_init_client(new_client);
 415
 416         /* Register sysfs hooks */
 417         data->class_dev = hwmon_device_register(&new_client->dev);
 418         if (IS_ERR(data->class_dev)) {
 419                 err = PTR_ERR(data->class_dev);
 420                 goto exit_detach;
 421         }
 422
 423         device_create_file(&new_client->dev, &dev_attr_in0_input);
 424         device_create_file(&new_client->dev, &dev_attr_in1_input);
 425         device_create_file(&new_client->dev, &dev_attr_in2_input);
 426         device_create_file(&new_client->dev, &dev_attr_in3_input);
 427         device_create_file(&new_client->dev, &dev_attr_in5_input);
 428         device_create_file(&new_client->dev, &dev_attr_in0_min);
 429         device_create_file(&new_client->dev, &dev_attr_in1_min);
 430         device_create_file(&new_client->dev, &dev_attr_in2_min);
 431         device_create_file(&new_client->dev, &dev_attr_in3_min);
 432         device_create_file(&new_client->dev, &dev_attr_in5_min);
 433         device_create_file(&new_client->dev, &dev_attr_in0_max);
 434         device_create_file(&new_client->dev, &dev_attr_in1_max);
 435         device_create_file(&new_client->dev, &dev_attr_in2_max);
 436         device_create_file(&new_client->dev, &dev_attr_in3_max);
 437         device_create_file(&new_client->dev, &dev_attr_in5_max);
 438         device_create_file(&new_client->dev, &dev_attr_temp1_input);
 439         device_create_file(&new_client->dev, &dev_attr_temp2_input);
 440         device_create_file(&new_client->dev, &dev_attr_temp1_min);
 441         device_create_file(&new_client->dev, &dev_attr_temp2_min);
 442         device_create_file(&new_client->dev, &dev_attr_temp1_max);
 443         device_create_file(&new_client->dev, &dev_attr_temp2_max);
 444         device_create_file(&new_client->dev, &dev_attr_alarms);
 445         device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
 446         device_create_file(&new_client->dev, &dev_attr_vrm);
 447
 448         /* Pin 11 is either in4 (+12V) or VID4 */
 449         if (!(config & 0x20)) {
 450                 device_create_file(&new_client->dev, &dev_attr_in4_input);
 451                 device_create_file(&new_client->dev, &dev_attr_in4_min);
 452                 device_create_file(&new_client->dev, &dev_attr_in4_max);
 453         }
 454
 455         return 0;
 456
 457 exit_detach:
 458         i2c_detach_client(new_client);
 459 exit_free:
 460         kfree(data);
 461 exit:
 462         return err;
 463 }
 464
 465 static void adm1025_init_client(struct i2c_client *client)
 466 {
 467         u8 reg;
 468         struct adm1025_data *data = i2c_get_clientdata(client);
 469         int i;
 470
 471         data->vrm = vid_which_vrm();
 472
 473         /*
 474          * Set high limits
 475          * Usually we avoid setting limits on driver init, but it happens
 476          * that the ADM1025 comes with stupid default limits (all registers
 477          * set to 0). In case the chip has not gone through any limit
 478          * setting yet, we better set the high limits to the max so that
 479          * no alarm triggers.
 480          */
 481         for (i=0; i<6; i++) {
 482                 reg = i2c_smbus_read_byte_data(client,
 483                                                ADM1025_REG_IN_MAX(i));
 484                 if (reg == 0)
 485                         i2c_smbus_write_byte_data(client,
 486                                                   ADM1025_REG_IN_MAX(i),
 487                                                   0xFF);
 488         }
 489         for (i=0; i<2; i++) {
 490                 reg = i2c_smbus_read_byte_data(client,
 491                                                ADM1025_REG_TEMP_HIGH(i));
 492                 if (reg == 0)
 493                         i2c_smbus_write_byte_data(client,
 494                                                   ADM1025_REG_TEMP_HIGH(i),
 495                                                   0x7F);
 496         }
 497
 498         /*
 499          * Start the conversions
 500          */
 501         reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 502         if (!(reg & 0x01))
 503                 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
 504                                           (reg&0x7E)|0x01);
 505 }
 506
 507 static int adm1025_detach_client(struct i2c_client *client)
 508 {
 509         struct adm1025_data *data = i2c_get_clientdata(client);
 510         int err;
 511
 512         hwmon_device_unregister(data->class_dev);
 513
 514         if ((err = i2c_detach_client(client)))
 515                 return err;
 516
 517         kfree(data);
 518         return 0;
 519 }
 520
 521 static struct adm1025_data *adm1025_update_device(struct device *dev)
 522 {
 523         struct i2c_client *client = to_i2c_client(dev);
 524         struct adm1025_data *data = i2c_get_clientdata(client);
 525
 526         down(&data->update_lock);
 527
 528         if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
 529                 int i;
 530
 531                 dev_dbg(&client->dev, "Updating data.\n");
 532                 for (i=0; i<6; i++) {
 533                         data->in[i] = i2c_smbus_read_byte_data(client,
 534                                       ADM1025_REG_IN(i));
 535                         data->in_min[i] = i2c_smbus_read_byte_data(client,
 536                                           ADM1025_REG_IN_MIN(i));
 537                         data->in_max[i] = i2c_smbus_read_byte_data(client,
 538                                           ADM1025_REG_IN_MAX(i));
 539                 }
 540                 for (i=0; i<2; i++) {
 541                         data->temp[i] = i2c_smbus_read_byte_data(client,
 542                                         ADM1025_REG_TEMP(i));
 543                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 544                                             ADM1025_REG_TEMP_LOW(i));
 545                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 546                                             ADM1025_REG_TEMP_HIGH(i));
 547                 }
 548                 data->alarms = i2c_smbus_read_byte_data(client,
 549                                ADM1025_REG_STATUS1)
 550                              | (i2c_smbus_read_byte_data(client,
 551                                 ADM1025_REG_STATUS2) << 8);
 552                 data->vid = (i2c_smbus_read_byte_data(client,
 553                              ADM1025_REG_VID) & 0x0f)
 554                           | ((i2c_smbus_read_byte_data(client,
 555                               ADM1025_REG_VID4) & 0x01) << 4);
 556
 557                 data->last_updated = jiffies;
 558                 data->valid = 1;
 559         }
 560
 561         up(&data->update_lock);
 562
 563         return data;
 564 }
 565
 566 static int __init sensors_adm1025_init(void)
 567 {
 568         return i2c_add_driver(&adm1025_driver);
 569 }
 570
 571 static void __exit sensors_adm1025_exit(void)
 572 {
 573         i2c_del_driver(&adm1025_driver);
 574 }
 575
 576 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 577 MODULE_DESCRIPTION("ADM1025 driver");
 578 MODULE_LICENSE("GPL");
 579
 580 module_init(sensors_adm1025_init);
 581 module_exit(sensors_adm1025_exit);