drivers/hwmon/adm1025.c

   1 /*
   2  * adm1025.c
   3  *
   4  * Copyright (C) 2000       Chen-Yuan Wu <gwu@esoft.com>
   5  * Copyright (C) 2003-2009  Jean Delvare <jdelvare@suse.de>
   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.onsemi.com/PowerSolutions/product.do?id=ADM1025
  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 enum chips { adm1025, ne1619 };
  68
  69 /*
  70  * The ADM1025 registers
  71  */
  72
  73 #define ADM1025_REG_MAN_ID              0x3E
  74 #define ADM1025_REG_CHIP_ID             0x3F
  75 #define ADM1025_REG_CONFIG              0x40
  76 #define ADM1025_REG_STATUS1             0x41
  77 #define ADM1025_REG_STATUS2             0x42
  78 #define ADM1025_REG_IN(nr)              (0x20 + (nr))
  79 #define ADM1025_REG_IN_MAX(nr)          (0x2B + (nr) * 2)
  80 #define ADM1025_REG_IN_MIN(nr)          (0x2C + (nr) * 2)
  81 #define ADM1025_REG_TEMP(nr)            (0x26 + (nr))
  82 #define ADM1025_REG_TEMP_HIGH(nr)       (0x37 + (nr) * 2)
  83 #define ADM1025_REG_TEMP_LOW(nr)        (0x38 + (nr) * 2)
  84 #define ADM1025_REG_VID                 0x47
  85 #define ADM1025_REG_VID4                0x49
  86
  87 /*
  88  * Conversions and various macros
  89  * The ADM1025 uses signed 8-bit values for temperatures.
  90  */
  91
  92 static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
  93
  94 #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
  95 #define IN_TO_REG(val, scale)   ((val) <= 0 ? 0 : \
  96                                  (val) * 192 >= (scale) * 255 ? 255 : \
  97                                  ((val) * 192 + (scale) / 2) / (scale))
  98
  99 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
 100 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
 101                                  (val) >= 126500 ? 127 : \
 102                                  (((val) < 0 ? (val) - 500 : \
 103                                    (val) + 500) / 1000))
 104
 105 /*
 106  * Client data (each client gets its own)
 107  */
 108
 109 struct adm1025_data {
 110         struct i2c_client *client;
 111         const struct attribute_group *groups[3];
 112         struct mutex update_lock;
 113         char valid; /* zero until following fields are valid */
 114         unsigned long last_updated; /* in jiffies */
 115
 116         u8 in[6];               /* register value */
 117         u8 in_max[6];           /* register value */
 118         u8 in_min[6];           /* register value */
 119         s8 temp[2];             /* register value */
 120         s8 temp_min[2];         /* register value */
 121         s8 temp_max[2];         /* register value */
 122         u16 alarms;             /* register values, combined */
 123         u8 vid;                 /* register values, combined */
 124         u8 vrm;
 125 };
 126
 127 static struct adm1025_data *adm1025_update_device(struct device *dev)
 128 {
 129         struct adm1025_data *data = dev_get_drvdata(dev);
 130         struct i2c_client *client = data->client;
 131
 132         mutex_lock(&data->update_lock);
 133
 134         if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
 135                 int i;
 136
 137                 dev_dbg(&client->dev, "Updating data.\n");
 138                 for (i = 0; i < 6; i++) {
 139                         data->in[i] = i2c_smbus_read_byte_data(client,
 140                                       ADM1025_REG_IN(i));
 141                         data->in_min[i] = i2c_smbus_read_byte_data(client,
 142                                           ADM1025_REG_IN_MIN(i));
 143                         data->in_max[i] = i2c_smbus_read_byte_data(client,
 144                                           ADM1025_REG_IN_MAX(i));
 145                 }
 146                 for (i = 0; i < 2; i++) {
 147                         data->temp[i] = i2c_smbus_read_byte_data(client,
 148                                         ADM1025_REG_TEMP(i));
 149                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 150                                             ADM1025_REG_TEMP_LOW(i));
 151                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 152                                             ADM1025_REG_TEMP_HIGH(i));
 153                 }
 154                 data->alarms = i2c_smbus_read_byte_data(client,
 155                                ADM1025_REG_STATUS1)
 156                              | (i2c_smbus_read_byte_data(client,
 157                                 ADM1025_REG_STATUS2) << 8);
 158                 data->vid = (i2c_smbus_read_byte_data(client,
 159                              ADM1025_REG_VID) & 0x0f)
 160                           | ((i2c_smbus_read_byte_data(client,
 161                               ADM1025_REG_VID4) & 0x01) << 4);
 162
 163                 data->last_updated = jiffies;
 164                 data->valid = 1;
 165         }
 166
 167         mutex_unlock(&data->update_lock);
 168
 169         return data;
 170 }
 171
 172 /*
 173  * Sysfs stuff
 174  */
 175
 176 static ssize_t
 177 show_in(struct device *dev, struct device_attribute *attr, char *buf)
 178 {
 179         int index = to_sensor_dev_attr(attr)->index;
 180         struct adm1025_data *data = adm1025_update_device(dev);
 181         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
 182                        in_scale[index]));
 183 }
 184
 185 static ssize_t
 186 show_in_min(struct device *dev, struct device_attribute *attr, char *buf)
 187 {
 188         int index = to_sensor_dev_attr(attr)->index;
 189         struct adm1025_data *data = adm1025_update_device(dev);
 190         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
 191                        in_scale[index]));
 192 }
 193
 194 static ssize_t
 195 show_in_max(struct device *dev, struct device_attribute *attr, char *buf)
 196 {
 197         int index = to_sensor_dev_attr(attr)->index;
 198         struct adm1025_data *data = adm1025_update_device(dev);
 199         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
 200                        in_scale[index]));
 201 }
 202
 203 static ssize_t
 204 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 205 {
 206         int index = to_sensor_dev_attr(attr)->index;
 207         struct adm1025_data *data = adm1025_update_device(dev);
 208         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
 209 }
 210
 211 static ssize_t
 212 show_temp_min(struct device *dev, struct device_attribute *attr, char *buf)
 213 {
 214         int index = to_sensor_dev_attr(attr)->index;
 215         struct adm1025_data *data = adm1025_update_device(dev);
 216         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index]));
 217 }
 218
 219 static ssize_t
 220 show_temp_max(struct device *dev, struct device_attribute *attr, char *buf)
 221 {
 222         int index = to_sensor_dev_attr(attr)->index;
 223         struct adm1025_data *data = adm1025_update_device(dev);
 224         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
 225 }
 226
 227 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 228                           const char *buf, size_t count)
 229 {
 230         int index = to_sensor_dev_attr(attr)->index;
 231         struct adm1025_data *data = dev_get_drvdata(dev);
 232         struct i2c_client *client = data->client;
 233         long val;
 234         int err;
 235
 236         err = kstrtol(buf, 10, &val);
 237         if (err)
 238                 return err;
 239
 240         mutex_lock(&data->update_lock);
 241         data->in_min[index] = IN_TO_REG(val, in_scale[index]);
 242         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
 243                                   data->in_min[index]);
 244         mutex_unlock(&data->update_lock);
 245         return count;
 246 }
 247
 248 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 249                           const char *buf, size_t count)
 250 {
 251         int index = to_sensor_dev_attr(attr)->index;
 252         struct adm1025_data *data = dev_get_drvdata(dev);
 253         struct i2c_client *client = data->client;
 254         long val;
 255         int err;
 256
 257         err = kstrtol(buf, 10, &val);
 258         if (err)
 259                 return err;
 260
 261         mutex_lock(&data->update_lock);
 262         data->in_max[index] = IN_TO_REG(val, in_scale[index]);
 263         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
 264                                   data->in_max[index]);
 265         mutex_unlock(&data->update_lock);
 266         return count;
 267 }
 268
 269 #define set_in(offset) \
 270 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
 271         show_in, NULL, offset); \
 272 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
 273         show_in_min, set_in_min, offset); \
 274 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
 275         show_in_max, set_in_max, offset)
 276 set_in(0);
 277 set_in(1);
 278 set_in(2);
 279 set_in(3);
 280 set_in(4);
 281 set_in(5);
 282
 283 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 284                             const char *buf, size_t count)
 285 {
 286         int index = to_sensor_dev_attr(attr)->index;
 287         struct adm1025_data *data = dev_get_drvdata(dev);
 288         struct i2c_client *client = data->client;
 289         long val;
 290         int err;
 291
 292         err = kstrtol(buf, 10, &val);
 293         if (err)
 294                 return err;
 295
 296         mutex_lock(&data->update_lock);
 297         data->temp_min[index] = TEMP_TO_REG(val);
 298         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
 299                                   data->temp_min[index]);
 300         mutex_unlock(&data->update_lock);
 301         return count;
 302 }
 303
 304 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 305         const char *buf, size_t count)
 306 {
 307         int index = to_sensor_dev_attr(attr)->index;
 308         struct adm1025_data *data = dev_get_drvdata(dev);
 309         struct i2c_client *client = data->client;
 310         long val;
 311         int err;
 312
 313         err = kstrtol(buf, 10, &val);
 314         if (err)
 315                 return err;
 316
 317         mutex_lock(&data->update_lock);
 318         data->temp_max[index] = TEMP_TO_REG(val);
 319         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
 320                                   data->temp_max[index]);
 321         mutex_unlock(&data->update_lock);
 322         return count;
 323 }
 324
 325 #define set_temp(offset) \
 326 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 327         show_temp, NULL, offset - 1); \
 328 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
 329         show_temp_min, set_temp_min, offset - 1); \
 330 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
 331         show_temp_max, set_temp_max, offset - 1)
 332 set_temp(1);
 333 set_temp(2);
 334
 335 static ssize_t
 336 show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 337 {
 338         struct adm1025_data *data = adm1025_update_device(dev);
 339         return sprintf(buf, "%u\n", data->alarms);
 340 }
 341 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 342
 343 static ssize_t
 344 show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
 345 {
 346         int bitnr = to_sensor_dev_attr(attr)->index;
 347         struct adm1025_data *data = adm1025_update_device(dev);
 348         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 349 }
 350 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 351 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 352 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 353 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 354 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
 355 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
 356 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5);
 357 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4);
 358 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
 359
 360 static ssize_t
 361 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 362 {
 363         struct adm1025_data *data = adm1025_update_device(dev);
 364         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 365 }
 366 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 367
 368 static ssize_t
 369 show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 370 {
 371         struct adm1025_data *data = dev_get_drvdata(dev);
 372         return sprintf(buf, "%u\n", data->vrm);
 373 }
 374 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 375                        const char *buf, size_t count)
 376 {
 377         struct adm1025_data *data = dev_get_drvdata(dev);
 378         unsigned long val;
 379         int err;
 380
 381         err = kstrtoul(buf, 10, &val);
 382         if (err)
 383                 return err;
 384
 385         if (val > 255)
 386                 return -EINVAL;
 387
 388         data->vrm = val;
 389         return count;
 390 }
 391 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
 392
 393 /*
 394  * Real code
 395  */
 396
 397 static struct attribute *adm1025_attributes[] = {
 398         &sensor_dev_attr_in0_input.dev_attr.attr,
 399         &sensor_dev_attr_in1_input.dev_attr.attr,
 400         &sensor_dev_attr_in2_input.dev_attr.attr,
 401         &sensor_dev_attr_in3_input.dev_attr.attr,
 402         &sensor_dev_attr_in5_input.dev_attr.attr,
 403         &sensor_dev_attr_in0_min.dev_attr.attr,
 404         &sensor_dev_attr_in1_min.dev_attr.attr,
 405         &sensor_dev_attr_in2_min.dev_attr.attr,
 406         &sensor_dev_attr_in3_min.dev_attr.attr,
 407         &sensor_dev_attr_in5_min.dev_attr.attr,
 408         &sensor_dev_attr_in0_max.dev_attr.attr,
 409         &sensor_dev_attr_in1_max.dev_attr.attr,
 410         &sensor_dev_attr_in2_max.dev_attr.attr,
 411         &sensor_dev_attr_in3_max.dev_attr.attr,
 412         &sensor_dev_attr_in5_max.dev_attr.attr,
 413         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 414         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 415         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 416         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 417         &sensor_dev_attr_in5_alarm.dev_attr.attr,
 418         &sensor_dev_attr_temp1_input.dev_attr.attr,
 419         &sensor_dev_attr_temp2_input.dev_attr.attr,
 420         &sensor_dev_attr_temp1_min.dev_attr.attr,
 421         &sensor_dev_attr_temp2_min.dev_attr.attr,
 422         &sensor_dev_attr_temp1_max.dev_attr.attr,
 423         &sensor_dev_attr_temp2_max.dev_attr.attr,
 424         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 425         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 426         &sensor_dev_attr_temp1_fault.dev_attr.attr,
 427         &dev_attr_alarms.attr,
 428         &dev_attr_cpu0_vid.attr,
 429         &dev_attr_vrm.attr,
 430         NULL
 431 };
 432
 433 static const struct attribute_group adm1025_group = {
 434         .attrs = adm1025_attributes,
 435 };
 436
 437 static struct attribute *adm1025_attributes_in4[] = {
 438         &sensor_dev_attr_in4_input.dev_attr.attr,
 439         &sensor_dev_attr_in4_min.dev_attr.attr,
 440         &sensor_dev_attr_in4_max.dev_attr.attr,
 441         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 442         NULL
 443 };
 444
 445 static const struct attribute_group adm1025_group_in4 = {
 446         .attrs = adm1025_attributes_in4,
 447 };
 448
 449 /* Return 0 if detection is successful, -ENODEV otherwise */
 450 static int adm1025_detect(struct i2c_client *client,
 451                           struct i2c_board_info *info)
 452 {
 453         struct i2c_adapter *adapter = client->adapter;
 454         const char *name;
 455         u8 man_id, chip_id;
 456
 457         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 458                 return -ENODEV;
 459
 460         /* Check for unused bits */
 461         if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
 462          || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
 463          || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
 464                 dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
 465                         client->addr);
 466                 return -ENODEV;
 467         }
 468
 469         /* Identification */
 470         chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
 471         if ((chip_id & 0xF0) != 0x20)
 472                 return -ENODEV;
 473
 474         man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
 475         if (man_id == 0x41)
 476                 name = "adm1025";
 477         else if (man_id == 0xA1 && client->addr != 0x2E)
 478                 name = "ne1619";
 479         else
 480                 return -ENODEV;
 481
 482         strlcpy(info->type, name, I2C_NAME_SIZE);
 483
 484         return 0;
 485 }
 486
 487 static void adm1025_init_client(struct i2c_client *client)
 488 {
 489         u8 reg;
 490         struct adm1025_data *data = i2c_get_clientdata(client);
 491         int i;
 492
 493         data->vrm = vid_which_vrm();
 494
 495         /*
 496          * Set high limits
 497          * Usually we avoid setting limits on driver init, but it happens
 498          * that the ADM1025 comes with stupid default limits (all registers
 499          * set to 0). In case the chip has not gone through any limit
 500          * setting yet, we better set the high limits to the max so that
 501          * no alarm triggers.
 502          */
 503         for (i = 0; i < 6; i++) {
 504                 reg = i2c_smbus_read_byte_data(client,
 505                                                ADM1025_REG_IN_MAX(i));
 506                 if (reg == 0)
 507                         i2c_smbus_write_byte_data(client,
 508                                                   ADM1025_REG_IN_MAX(i),
 509                                                   0xFF);
 510         }
 511         for (i = 0; i < 2; i++) {
 512                 reg = i2c_smbus_read_byte_data(client,
 513                                                ADM1025_REG_TEMP_HIGH(i));
 514                 if (reg == 0)
 515                         i2c_smbus_write_byte_data(client,
 516                                                   ADM1025_REG_TEMP_HIGH(i),
 517                                                   0x7F);
 518         }
 519
 520         /*
 521          * Start the conversions
 522          */
 523         reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 524         if (!(reg & 0x01))
 525                 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
 526                                           (reg&0x7E)|0x01);
 527 }
 528
 529 static int adm1025_probe(struct i2c_client *client,
 530                          const struct i2c_device_id *id)
 531 {
 532         struct device *dev = &client->dev;
 533         struct device *hwmon_dev;
 534         struct adm1025_data *data;
 535         u8 config;
 536
 537         data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL);
 538         if (!data)
 539                 return -ENOMEM;
 540
 541         i2c_set_clientdata(client, data);
 542         data->client = client;
 543         mutex_init(&data->update_lock);
 544
 545         /* Initialize the ADM1025 chip */
 546         adm1025_init_client(client);
 547
 548         /* sysfs hooks */
 549         data->groups[0] = &adm1025_group;
 550         /* Pin 11 is either in4 (+12V) or VID4 */
 551         config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 552         if (!(config & 0x20))
 553                 data->groups[1] = &adm1025_group_in4;
 554
 555         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 556                                                            data, data->groups);
 557         return PTR_ERR_OR_ZERO(hwmon_dev);
 558 }
 559
 560 static const struct i2c_device_id adm1025_id[] = {
 561         { "adm1025", adm1025 },
 562         { "ne1619", ne1619 },
 563         { }
 564 };
 565 MODULE_DEVICE_TABLE(i2c, adm1025_id);
 566
 567 static struct i2c_driver adm1025_driver = {
 568         .class          = I2C_CLASS_HWMON,
 569         .driver = {
 570                 .name   = "adm1025",
 571         },
 572         .probe          = adm1025_probe,
 573         .id_table       = adm1025_id,
 574         .detect         = adm1025_detect,
 575         .address_list   = normal_i2c,
 576 };
 577
 578 module_i2c_driver(adm1025_driver);
 579
 580 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
 581 MODULE_DESCRIPTION("ADM1025 driver");
 582 MODULE_LICENSE("GPL");