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) >= (scale) * 255 / 192 ? 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 in_show(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 in_min_show(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 in_max_show(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 temp_show(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 temp_min_show(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 temp_max_show(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 in_min_store(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 in_max_store(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 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
 270 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
 271 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
 272 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
 273 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
 274 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
 275 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
 276 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
 277 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
 278 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
 279 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
 280 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
 281 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
 282 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
 283 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
 284 static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
 285 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
 286 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
 287
 288 static ssize_t temp_min_store(struct device *dev,
 289                               struct device_attribute *attr, const char *buf,
 290                               size_t count)
 291 {
 292         int index = to_sensor_dev_attr(attr)->index;
 293         struct adm1025_data *data = dev_get_drvdata(dev);
 294         struct i2c_client *client = data->client;
 295         long val;
 296         int err;
 297
 298         err = kstrtol(buf, 10, &val);
 299         if (err)
 300                 return err;
 301
 302         mutex_lock(&data->update_lock);
 303         data->temp_min[index] = TEMP_TO_REG(val);
 304         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
 305                                   data->temp_min[index]);
 306         mutex_unlock(&data->update_lock);
 307         return count;
 308 }
 309
 310 static ssize_t temp_max_store(struct device *dev,
 311                               struct device_attribute *attr, const char *buf,
 312                               size_t count)
 313 {
 314         int index = to_sensor_dev_attr(attr)->index;
 315         struct adm1025_data *data = dev_get_drvdata(dev);
 316         struct i2c_client *client = data->client;
 317         long val;
 318         int err;
 319
 320         err = kstrtol(buf, 10, &val);
 321         if (err)
 322                 return err;
 323
 324         mutex_lock(&data->update_lock);
 325         data->temp_max[index] = TEMP_TO_REG(val);
 326         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
 327                                   data->temp_max[index]);
 328         mutex_unlock(&data->update_lock);
 329         return count;
 330 }
 331
 332 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
 333 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
 334 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
 335 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
 336 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
 337 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
 338
 339 static ssize_t
 340 alarms_show(struct device *dev, struct device_attribute *attr, char *buf)
 341 {
 342         struct adm1025_data *data = adm1025_update_device(dev);
 343         return sprintf(buf, "%u\n", data->alarms);
 344 }
 345 static DEVICE_ATTR_RO(alarms);
 346
 347 static ssize_t
 348 alarm_show(struct device *dev, struct device_attribute *attr, char *buf)
 349 {
 350         int bitnr = to_sensor_dev_attr(attr)->index;
 351         struct adm1025_data *data = adm1025_update_device(dev);
 352         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 353 }
 354 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
 355 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
 356 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
 357 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
 358 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
 359 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9);
 360 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 5);
 361 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 4);
 362 static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14);
 363
 364 static ssize_t
 365 cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf)
 366 {
 367         struct adm1025_data *data = adm1025_update_device(dev);
 368         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 369 }
 370 static DEVICE_ATTR_RO(cpu0_vid);
 371
 372 static ssize_t
 373 vrm_show(struct device *dev, struct device_attribute *attr, char *buf)
 374 {
 375         struct adm1025_data *data = dev_get_drvdata(dev);
 376         return sprintf(buf, "%u\n", data->vrm);
 377 }
 378 static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
 379                          const char *buf, size_t count)
 380 {
 381         struct adm1025_data *data = dev_get_drvdata(dev);
 382         unsigned long val;
 383         int err;
 384
 385         err = kstrtoul(buf, 10, &val);
 386         if (err)
 387                 return err;
 388
 389         if (val > 255)
 390                 return -EINVAL;
 391
 392         data->vrm = val;
 393         return count;
 394 }
 395 static DEVICE_ATTR_RW(vrm);
 396
 397 /*
 398  * Real code
 399  */
 400
 401 static struct attribute *adm1025_attributes[] = {
 402         &sensor_dev_attr_in0_input.dev_attr.attr,
 403         &sensor_dev_attr_in1_input.dev_attr.attr,
 404         &sensor_dev_attr_in2_input.dev_attr.attr,
 405         &sensor_dev_attr_in3_input.dev_attr.attr,
 406         &sensor_dev_attr_in5_input.dev_attr.attr,
 407         &sensor_dev_attr_in0_min.dev_attr.attr,
 408         &sensor_dev_attr_in1_min.dev_attr.attr,
 409         &sensor_dev_attr_in2_min.dev_attr.attr,
 410         &sensor_dev_attr_in3_min.dev_attr.attr,
 411         &sensor_dev_attr_in5_min.dev_attr.attr,
 412         &sensor_dev_attr_in0_max.dev_attr.attr,
 413         &sensor_dev_attr_in1_max.dev_attr.attr,
 414         &sensor_dev_attr_in2_max.dev_attr.attr,
 415         &sensor_dev_attr_in3_max.dev_attr.attr,
 416         &sensor_dev_attr_in5_max.dev_attr.attr,
 417         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 418         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 419         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 420         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 421         &sensor_dev_attr_in5_alarm.dev_attr.attr,
 422         &sensor_dev_attr_temp1_input.dev_attr.attr,
 423         &sensor_dev_attr_temp2_input.dev_attr.attr,
 424         &sensor_dev_attr_temp1_min.dev_attr.attr,
 425         &sensor_dev_attr_temp2_min.dev_attr.attr,
 426         &sensor_dev_attr_temp1_max.dev_attr.attr,
 427         &sensor_dev_attr_temp2_max.dev_attr.attr,
 428         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 429         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 430         &sensor_dev_attr_temp1_fault.dev_attr.attr,
 431         &dev_attr_alarms.attr,
 432         &dev_attr_cpu0_vid.attr,
 433         &dev_attr_vrm.attr,
 434         NULL
 435 };
 436
 437 static const struct attribute_group adm1025_group = {
 438         .attrs = adm1025_attributes,
 439 };
 440
 441 static struct attribute *adm1025_attributes_in4[] = {
 442         &sensor_dev_attr_in4_input.dev_attr.attr,
 443         &sensor_dev_attr_in4_min.dev_attr.attr,
 444         &sensor_dev_attr_in4_max.dev_attr.attr,
 445         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 446         NULL
 447 };
 448
 449 static const struct attribute_group adm1025_group_in4 = {
 450         .attrs = adm1025_attributes_in4,
 451 };
 452
 453 /* Return 0 if detection is successful, -ENODEV otherwise */
 454 static int adm1025_detect(struct i2c_client *client,
 455                           struct i2c_board_info *info)
 456 {
 457         struct i2c_adapter *adapter = client->adapter;
 458         const char *name;
 459         u8 man_id, chip_id;
 460
 461         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 462                 return -ENODEV;
 463
 464         /* Check for unused bits */
 465         if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80)
 466          || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0)
 467          || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) {
 468                 dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n",
 469                         client->addr);
 470                 return -ENODEV;
 471         }
 472
 473         /* Identification */
 474         chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
 475         if ((chip_id & 0xF0) != 0x20)
 476                 return -ENODEV;
 477
 478         man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
 479         if (man_id == 0x41)
 480                 name = "adm1025";
 481         else if (man_id == 0xA1 && client->addr != 0x2E)
 482                 name = "ne1619";
 483         else
 484                 return -ENODEV;
 485
 486         strlcpy(info->type, name, I2C_NAME_SIZE);
 487
 488         return 0;
 489 }
 490
 491 static void adm1025_init_client(struct i2c_client *client)
 492 {
 493         u8 reg;
 494         struct adm1025_data *data = i2c_get_clientdata(client);
 495         int i;
 496
 497         data->vrm = vid_which_vrm();
 498
 499         /*
 500          * Set high limits
 501          * Usually we avoid setting limits on driver init, but it happens
 502          * that the ADM1025 comes with stupid default limits (all registers
 503          * set to 0). In case the chip has not gone through any limit
 504          * setting yet, we better set the high limits to the max so that
 505          * no alarm triggers.
 506          */
 507         for (i = 0; i < 6; i++) {
 508                 reg = i2c_smbus_read_byte_data(client,
 509                                                ADM1025_REG_IN_MAX(i));
 510                 if (reg == 0)
 511                         i2c_smbus_write_byte_data(client,
 512                                                   ADM1025_REG_IN_MAX(i),
 513                                                   0xFF);
 514         }
 515         for (i = 0; i < 2; i++) {
 516                 reg = i2c_smbus_read_byte_data(client,
 517                                                ADM1025_REG_TEMP_HIGH(i));
 518                 if (reg == 0)
 519                         i2c_smbus_write_byte_data(client,
 520                                                   ADM1025_REG_TEMP_HIGH(i),
 521                                                   0x7F);
 522         }
 523
 524         /*
 525          * Start the conversions
 526          */
 527         reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 528         if (!(reg & 0x01))
 529                 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
 530                                           (reg&0x7E)|0x01);
 531 }
 532
 533 static int adm1025_probe(struct i2c_client *client,
 534                          const struct i2c_device_id *id)
 535 {
 536         struct device *dev = &client->dev;
 537         struct device *hwmon_dev;
 538         struct adm1025_data *data;
 539         u8 config;
 540
 541         data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL);
 542         if (!data)
 543                 return -ENOMEM;
 544
 545         i2c_set_clientdata(client, data);
 546         data->client = client;
 547         mutex_init(&data->update_lock);
 548
 549         /* Initialize the ADM1025 chip */
 550         adm1025_init_client(client);
 551
 552         /* sysfs hooks */
 553         data->groups[0] = &adm1025_group;
 554         /* Pin 11 is either in4 (+12V) or VID4 */
 555         config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 556         if (!(config & 0x20))
 557                 data->groups[1] = &adm1025_group_in4;
 558
 559         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 560                                                            data, data->groups);
 561         return PTR_ERR_OR_ZERO(hwmon_dev);
 562 }
 563
 564 static const struct i2c_device_id adm1025_id[] = {
 565         { "adm1025", adm1025 },
 566         { "ne1619", ne1619 },
 567         { }
 568 };
 569 MODULE_DEVICE_TABLE(i2c, adm1025_id);
 570
 571 static struct i2c_driver adm1025_driver = {
 572         .class          = I2C_CLASS_HWMON,
 573         .driver = {
 574                 .name   = "adm1025",
 575         },
 576         .probe          = adm1025_probe,
 577         .id_table       = adm1025_id,
 578         .detect         = adm1025_detect,
 579         .address_list   = normal_i2c,
 580 };
 581
 582 module_i2c_driver(adm1025_driver);
 583
 584 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
 585 MODULE_DESCRIPTION("ADM1025 driver");
 586 MODULE_LICENSE("GPL");