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