drivers/hwmon/adm1025.c

   1 /*
   2  * adm1025.c
   3  *
   4  * Copyright (C) 2000       Chen-Yuan Wu <gwu@esoft.com>
   5  * Copyright (C) 2003-2008  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-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 /*
  68  * Insmod parameters
  69  */
  70
  71 I2C_CLIENT_INSMOD_2(adm1025, ne1619);
  72
  73 /*
  74  * The ADM1025 registers
  75  */
  76
  77 #define ADM1025_REG_MAN_ID              0x3E
  78 #define ADM1025_REG_CHIP_ID             0x3F
  79 #define ADM1025_REG_CONFIG              0x40
  80 #define ADM1025_REG_STATUS1             0x41
  81 #define ADM1025_REG_STATUS2             0x42
  82 #define ADM1025_REG_IN(nr)              (0x20 + (nr))
  83 #define ADM1025_REG_IN_MAX(nr)          (0x2B + (nr) * 2)
  84 #define ADM1025_REG_IN_MIN(nr)          (0x2C + (nr) * 2)
  85 #define ADM1025_REG_TEMP(nr)            (0x26 + (nr))
  86 #define ADM1025_REG_TEMP_HIGH(nr)       (0x37 + (nr) * 2)
  87 #define ADM1025_REG_TEMP_LOW(nr)        (0x38 + (nr) * 2)
  88 #define ADM1025_REG_VID                 0x47
  89 #define ADM1025_REG_VID4                0x49
  90
  91 /*
  92  * Conversions and various macros
  93  * The ADM1025 uses signed 8-bit values for temperatures.
  94  */
  95
  96 static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 };
  97
  98 #define IN_FROM_REG(reg,scale)  (((reg) * (scale) + 96) / 192)
  99 #define IN_TO_REG(val,scale)    ((val) <= 0 ? 0 : \
 100                                  (val) * 192 >= (scale) * 255 ? 255 : \
 101                                  ((val) * 192 + (scale)/2) / (scale))
 102
 103 #define TEMP_FROM_REG(reg)      ((reg) * 1000)
 104 #define TEMP_TO_REG(val)        ((val) <= -127500 ? -128 : \
 105                                  (val) >= 126500 ? 127 : \
 106                                  (((val) < 0 ? (val)-500 : (val)+500) / 1000))
 107
 108 /*
 109  * Functions declaration
 110  */
 111
 112 static int adm1025_probe(struct i2c_client *client,
 113                          const struct i2c_device_id *id);
 114 static int adm1025_detect(struct i2c_client *client, int kind,
 115                           struct i2c_board_info *info);
 116 static void adm1025_init_client(struct i2c_client *client);
 117 static int adm1025_remove(struct i2c_client *client);
 118 static struct adm1025_data *adm1025_update_device(struct device *dev);
 119
 120 /*
 121  * Driver data (common to all clients)
 122  */
 123
 124 static const struct i2c_device_id adm1025_id[] = {
 125         { "adm1025", adm1025 },
 126         { "ne1619", ne1619 },
 127         { }
 128 };
 129 MODULE_DEVICE_TABLE(i2c, adm1025_id);
 130
 131 static struct i2c_driver adm1025_driver = {
 132         .class          = I2C_CLASS_HWMON,
 133         .driver = {
 134                 .name   = "adm1025",
 135         },
 136         .probe          = adm1025_probe,
 137         .remove         = adm1025_remove,
 138         .id_table       = adm1025_id,
 139         .detect         = adm1025_detect,
 140         .address_data   = &addr_data,
 141 };
 142
 143 /*
 144  * Client data (each client gets its own)
 145  */
 146
 147 struct adm1025_data {
 148         struct device *hwmon_dev;
 149         struct mutex update_lock;
 150         char valid; /* zero until following fields are valid */
 151         unsigned long last_updated; /* in jiffies */
 152
 153         u8 in[6];               /* register value */
 154         u8 in_max[6];           /* register value */
 155         u8 in_min[6];           /* register value */
 156         s8 temp[2];             /* register value */
 157         s8 temp_min[2];         /* register value */
 158         s8 temp_max[2];         /* register value */
 159         u16 alarms;             /* register values, combined */
 160         u8 vid;                 /* register values, combined */
 161         u8 vrm;
 162 };
 163
 164 /*
 165  * Sysfs stuff
 166  */
 167
 168 static ssize_t
 169 show_in(struct device *dev, struct device_attribute *attr, char *buf)
 170 {
 171         int index = to_sensor_dev_attr(attr)->index;
 172         struct adm1025_data *data = adm1025_update_device(dev);
 173         return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index],
 174                        in_scale[index]));
 175 }
 176
 177 static ssize_t
 178 show_in_min(struct device *dev, struct device_attribute *attr, char *buf)
 179 {
 180         int index = to_sensor_dev_attr(attr)->index;
 181         struct adm1025_data *data = adm1025_update_device(dev);
 182         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index],
 183                        in_scale[index]));
 184 }
 185
 186 static ssize_t
 187 show_in_max(struct device *dev, struct device_attribute *attr, char *buf)
 188 {
 189         int index = to_sensor_dev_attr(attr)->index;
 190         struct adm1025_data *data = adm1025_update_device(dev);
 191         return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index],
 192                        in_scale[index]));
 193 }
 194
 195 static ssize_t
 196 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
 197 {
 198         int index = to_sensor_dev_attr(attr)->index;
 199         struct adm1025_data *data = adm1025_update_device(dev);
 200         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index]));
 201 }
 202
 203 static ssize_t
 204 show_temp_min(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_min[index]));
 209 }
 210
 211 static ssize_t
 212 show_temp_max(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_max[index]));
 217 }
 218
 219 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 220                           const char *buf, size_t count)
 221 {
 222         int index = to_sensor_dev_attr(attr)->index;
 223         struct i2c_client *client = to_i2c_client(dev);
 224         struct adm1025_data *data = i2c_get_clientdata(client);
 225         long val = simple_strtol(buf, NULL, 10);
 226
 227         mutex_lock(&data->update_lock);
 228         data->in_min[index] = IN_TO_REG(val, in_scale[index]);
 229         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index),
 230                                   data->in_min[index]);
 231         mutex_unlock(&data->update_lock);
 232         return count;
 233 }
 234
 235 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 236                           const char *buf, size_t count)
 237 {
 238         int index = to_sensor_dev_attr(attr)->index;
 239         struct i2c_client *client = to_i2c_client(dev);
 240         struct adm1025_data *data = i2c_get_clientdata(client);
 241         long val = simple_strtol(buf, NULL, 10);
 242
 243         mutex_lock(&data->update_lock);
 244         data->in_max[index] = IN_TO_REG(val, in_scale[index]);
 245         i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index),
 246                                   data->in_max[index]);
 247         mutex_unlock(&data->update_lock);
 248         return count;
 249 }
 250
 251 #define set_in(offset) \
 252 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
 253         show_in, NULL, offset); \
 254 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \
 255         show_in_min, set_in_min, offset); \
 256 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \
 257         show_in_max, set_in_max, offset)
 258 set_in(0);
 259 set_in(1);
 260 set_in(2);
 261 set_in(3);
 262 set_in(4);
 263 set_in(5);
 264
 265 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 266                             const char *buf, size_t count)
 267 {
 268         int index = to_sensor_dev_attr(attr)->index;
 269         struct i2c_client *client = to_i2c_client(dev);
 270         struct adm1025_data *data = i2c_get_clientdata(client);
 271         long val = simple_strtol(buf, NULL, 10);
 272
 273         mutex_lock(&data->update_lock);
 274         data->temp_min[index] = TEMP_TO_REG(val);
 275         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index),
 276                                   data->temp_min[index]);
 277         mutex_unlock(&data->update_lock);
 278         return count;
 279 }
 280
 281 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 282         const char *buf, size_t count)
 283 {
 284         int index = to_sensor_dev_attr(attr)->index;
 285         struct i2c_client *client = to_i2c_client(dev);
 286         struct adm1025_data *data = i2c_get_clientdata(client);
 287         long val = simple_strtol(buf, NULL, 10);
 288
 289         mutex_lock(&data->update_lock);
 290         data->temp_max[index] = TEMP_TO_REG(val);
 291         i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index),
 292                                   data->temp_max[index]);
 293         mutex_unlock(&data->update_lock);
 294         return count;
 295 }
 296
 297 #define set_temp(offset) \
 298 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
 299         show_temp, NULL, offset - 1); \
 300 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \
 301         show_temp_min, set_temp_min, offset - 1); \
 302 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \
 303         show_temp_max, set_temp_max, offset - 1)
 304 set_temp(1);
 305 set_temp(2);
 306
 307 static ssize_t
 308 show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 309 {
 310         struct adm1025_data *data = adm1025_update_device(dev);
 311         return sprintf(buf, "%u\n", data->alarms);
 312 }
 313 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 314
 315 static ssize_t
 316 show_alarm(struct device *dev, struct device_attribute *attr, char *buf)
 317 {
 318         int bitnr = to_sensor_dev_attr(attr)->index;
 319         struct adm1025_data *data = adm1025_update_device(dev);
 320         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 321 }
 322 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 323 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 324 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 325 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 326 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
 327 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
 328 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5);
 329 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4);
 330 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
 331
 332 static ssize_t
 333 show_vid(struct device *dev, struct device_attribute *attr, char *buf)
 334 {
 335         struct adm1025_data *data = adm1025_update_device(dev);
 336         return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
 337 }
 338 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
 339
 340 static ssize_t
 341 show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
 342 {
 343         struct adm1025_data *data = dev_get_drvdata(dev);
 344         return sprintf(buf, "%u\n", data->vrm);
 345 }
 346 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
 347                        const char *buf, size_t count)
 348 {
 349         struct adm1025_data *data = dev_get_drvdata(dev);
 350         data->vrm = simple_strtoul(buf, NULL, 10);
 351         return count;
 352 }
 353 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
 354
 355 /*
 356  * Real code
 357  */
 358
 359 static struct attribute *adm1025_attributes[] = {
 360         &sensor_dev_attr_in0_input.dev_attr.attr,
 361         &sensor_dev_attr_in1_input.dev_attr.attr,
 362         &sensor_dev_attr_in2_input.dev_attr.attr,
 363         &sensor_dev_attr_in3_input.dev_attr.attr,
 364         &sensor_dev_attr_in5_input.dev_attr.attr,
 365         &sensor_dev_attr_in0_min.dev_attr.attr,
 366         &sensor_dev_attr_in1_min.dev_attr.attr,
 367         &sensor_dev_attr_in2_min.dev_attr.attr,
 368         &sensor_dev_attr_in3_min.dev_attr.attr,
 369         &sensor_dev_attr_in5_min.dev_attr.attr,
 370         &sensor_dev_attr_in0_max.dev_attr.attr,
 371         &sensor_dev_attr_in1_max.dev_attr.attr,
 372         &sensor_dev_attr_in2_max.dev_attr.attr,
 373         &sensor_dev_attr_in3_max.dev_attr.attr,
 374         &sensor_dev_attr_in5_max.dev_attr.attr,
 375         &sensor_dev_attr_in0_alarm.dev_attr.attr,
 376         &sensor_dev_attr_in1_alarm.dev_attr.attr,
 377         &sensor_dev_attr_in2_alarm.dev_attr.attr,
 378         &sensor_dev_attr_in3_alarm.dev_attr.attr,
 379         &sensor_dev_attr_in5_alarm.dev_attr.attr,
 380         &sensor_dev_attr_temp1_input.dev_attr.attr,
 381         &sensor_dev_attr_temp2_input.dev_attr.attr,
 382         &sensor_dev_attr_temp1_min.dev_attr.attr,
 383         &sensor_dev_attr_temp2_min.dev_attr.attr,
 384         &sensor_dev_attr_temp1_max.dev_attr.attr,
 385         &sensor_dev_attr_temp2_max.dev_attr.attr,
 386         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 387         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 388         &sensor_dev_attr_temp1_fault.dev_attr.attr,
 389         &dev_attr_alarms.attr,
 390         &dev_attr_cpu0_vid.attr,
 391         &dev_attr_vrm.attr,
 392         NULL
 393 };
 394
 395 static const struct attribute_group adm1025_group = {
 396         .attrs = adm1025_attributes,
 397 };
 398
 399 static struct attribute *adm1025_attributes_in4[] = {
 400         &sensor_dev_attr_in4_input.dev_attr.attr,
 401         &sensor_dev_attr_in4_min.dev_attr.attr,
 402         &sensor_dev_attr_in4_max.dev_attr.attr,
 403         &sensor_dev_attr_in4_alarm.dev_attr.attr,
 404         NULL
 405 };
 406
 407 static const struct attribute_group adm1025_group_in4 = {
 408         .attrs = adm1025_attributes_in4,
 409 };
 410
 411 /* Return 0 if detection is successful, -ENODEV otherwise */
 412 static int adm1025_detect(struct i2c_client *client, int kind,
 413                           struct i2c_board_info *info)
 414 {
 415         struct i2c_adapter *adapter = client->adapter;
 416         const char *name = "";
 417         u8 config;
 418
 419         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 420                 return -ENODEV;
 421
 422         /*
 423          * Now we do the remaining detection. A negative kind means that
 424          * the driver was loaded with no force parameter (default), so we
 425          * must both detect and identify the chip. A zero kind means that
 426          * the driver was loaded with the force parameter, the detection
 427          * step shall be skipped. A positive kind means that the driver
 428          * was loaded with the force parameter and a given kind of chip is
 429          * requested, so both the detection and the identification steps
 430          * are skipped.
 431          */
 432         config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 433         if (kind < 0) { /* detection */
 434                 if ((config & 0x80) != 0x00
 435                  || (i2c_smbus_read_byte_data(client,
 436                      ADM1025_REG_STATUS1) & 0xC0) != 0x00
 437                  || (i2c_smbus_read_byte_data(client,
 438                      ADM1025_REG_STATUS2) & 0xBC) != 0x00) {
 439                         dev_dbg(&adapter->dev,
 440                                 "ADM1025 detection failed at 0x%02x.\n",
 441                                 client->addr);
 442                         return -ENODEV;
 443                 }
 444         }
 445
 446         if (kind <= 0) { /* identification */
 447                 u8 man_id, chip_id;
 448
 449                 man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID);
 450                 chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID);
 451
 452                 if (man_id == 0x41) { /* Analog Devices */
 453                         if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */
 454                                 kind = adm1025;
 455                         }
 456                 } else
 457                 if (man_id == 0xA1) { /* Philips */
 458                         if (client->addr != 0x2E
 459                          && (chip_id & 0xF0) == 0x20) { /* NE1619 */
 460                                 kind = ne1619;
 461                         }
 462                 }
 463
 464                 if (kind <= 0) { /* identification failed */
 465                         dev_info(&adapter->dev,
 466                             "Unsupported chip (man_id=0x%02X, "
 467                             "chip_id=0x%02X).\n", man_id, chip_id);
 468                         return -ENODEV;
 469                 }
 470         }
 471
 472         if (kind == adm1025) {
 473                 name = "adm1025";
 474         } else if (kind == ne1619) {
 475                 name = "ne1619";
 476         }
 477         strlcpy(info->type, name, I2C_NAME_SIZE);
 478
 479         return 0;
 480 }
 481
 482 static int adm1025_probe(struct i2c_client *client,
 483                          const struct i2c_device_id *id)
 484 {
 485         struct adm1025_data *data;
 486         int err;
 487         u8 config;
 488
 489         data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL);
 490         if (!data) {
 491                 err = -ENOMEM;
 492                 goto exit;
 493         }
 494
 495         i2c_set_clientdata(client, data);
 496         mutex_init(&data->update_lock);
 497
 498         /* Initialize the ADM1025 chip */
 499         adm1025_init_client(client);
 500
 501         /* Register sysfs hooks */
 502         if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group)))
 503                 goto exit_free;
 504
 505         /* Pin 11 is either in4 (+12V) or VID4 */
 506         config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 507         if (!(config & 0x20)) {
 508                 if ((err = sysfs_create_group(&client->dev.kobj,
 509                                               &adm1025_group_in4)))
 510                         goto exit_remove;
 511         }
 512
 513         data->hwmon_dev = hwmon_device_register(&client->dev);
 514         if (IS_ERR(data->hwmon_dev)) {
 515                 err = PTR_ERR(data->hwmon_dev);
 516                 goto exit_remove;
 517         }
 518
 519         return 0;
 520
 521 exit_remove:
 522         sysfs_remove_group(&client->dev.kobj, &adm1025_group);
 523         sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
 524 exit_free:
 525         kfree(data);
 526 exit:
 527         return err;
 528 }
 529
 530 static void adm1025_init_client(struct i2c_client *client)
 531 {
 532         u8 reg;
 533         struct adm1025_data *data = i2c_get_clientdata(client);
 534         int i;
 535
 536         data->vrm = vid_which_vrm();
 537
 538         /*
 539          * Set high limits
 540          * Usually we avoid setting limits on driver init, but it happens
 541          * that the ADM1025 comes with stupid default limits (all registers
 542          * set to 0). In case the chip has not gone through any limit
 543          * setting yet, we better set the high limits to the max so that
 544          * no alarm triggers.
 545          */
 546         for (i=0; i<6; i++) {
 547                 reg = i2c_smbus_read_byte_data(client,
 548                                                ADM1025_REG_IN_MAX(i));
 549                 if (reg == 0)
 550                         i2c_smbus_write_byte_data(client,
 551                                                   ADM1025_REG_IN_MAX(i),
 552                                                   0xFF);
 553         }
 554         for (i=0; i<2; i++) {
 555                 reg = i2c_smbus_read_byte_data(client,
 556                                                ADM1025_REG_TEMP_HIGH(i));
 557                 if (reg == 0)
 558                         i2c_smbus_write_byte_data(client,
 559                                                   ADM1025_REG_TEMP_HIGH(i),
 560                                                   0x7F);
 561         }
 562
 563         /*
 564          * Start the conversions
 565          */
 566         reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
 567         if (!(reg & 0x01))
 568                 i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG,
 569                                           (reg&0x7E)|0x01);
 570 }
 571
 572 static int adm1025_remove(struct i2c_client *client)
 573 {
 574         struct adm1025_data *data = i2c_get_clientdata(client);
 575
 576         hwmon_device_unregister(data->hwmon_dev);
 577         sysfs_remove_group(&client->dev.kobj, &adm1025_group);
 578         sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4);
 579
 580         kfree(data);
 581         return 0;
 582 }
 583
 584 static struct adm1025_data *adm1025_update_device(struct device *dev)
 585 {
 586         struct i2c_client *client = to_i2c_client(dev);
 587         struct adm1025_data *data = i2c_get_clientdata(client);
 588
 589         mutex_lock(&data->update_lock);
 590
 591         if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
 592                 int i;
 593
 594                 dev_dbg(&client->dev, "Updating data.\n");
 595                 for (i=0; i<6; i++) {
 596                         data->in[i] = i2c_smbus_read_byte_data(client,
 597                                       ADM1025_REG_IN(i));
 598                         data->in_min[i] = i2c_smbus_read_byte_data(client,
 599                                           ADM1025_REG_IN_MIN(i));
 600                         data->in_max[i] = i2c_smbus_read_byte_data(client,
 601                                           ADM1025_REG_IN_MAX(i));
 602                 }
 603                 for (i=0; i<2; i++) {
 604                         data->temp[i] = i2c_smbus_read_byte_data(client,
 605                                         ADM1025_REG_TEMP(i));
 606                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
 607                                             ADM1025_REG_TEMP_LOW(i));
 608                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
 609                                             ADM1025_REG_TEMP_HIGH(i));
 610                 }
 611                 data->alarms = i2c_smbus_read_byte_data(client,
 612                                ADM1025_REG_STATUS1)
 613                              | (i2c_smbus_read_byte_data(client,
 614                                 ADM1025_REG_STATUS2) << 8);
 615                 data->vid = (i2c_smbus_read_byte_data(client,
 616                              ADM1025_REG_VID) & 0x0f)
 617                           | ((i2c_smbus_read_byte_data(client,
 618                               ADM1025_REG_VID4) & 0x01) << 4);
 619
 620                 data->last_updated = jiffies;
 621                 data->valid = 1;
 622         }
 623
 624         mutex_unlock(&data->update_lock);
 625
 626         return data;
 627 }
 628
 629 static int __init sensors_adm1025_init(void)
 630 {
 631         return i2c_add_driver(&adm1025_driver);
 632 }
 633
 634 static void __exit sensors_adm1025_exit(void)
 635 {
 636         i2c_del_driver(&adm1025_driver);
 637 }
 638
 639 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 640 MODULE_DESCRIPTION("ADM1025 driver");
 641 MODULE_LICENSE("GPL");
 642
 643 module_init(sensors_adm1025_init);
 644 module_exit(sensors_adm1025_exit);