drivers/hwmon/lm63.c

   1 /*
   2  * lm63.c - driver for the National Semiconductor LM63 temperature sensor
   3  *          with integrated fan control
   4  * Copyright (C) 2004-2008  Jean Delvare <khali@linux-fr.org>
   5  * Based on the lm90 driver.
   6  *
   7  * The LM63 is a sensor chip made by National Semiconductor. It measures
   8  * two temperatures (its own and one external one) and the speed of one
   9  * fan, those speed it can additionally control. Complete datasheet can be
  10  * obtained from National's website at:
  11  *   http://www.national.com/pf/LM/LM63.html
  12  *
  13  * The LM63 is basically an LM86 with fan speed monitoring and control
  14  * capabilities added. It misses some of the LM86 features though:
  15  *  - No low limit for local temperature.
  16  *  - No critical limit for local temperature.
  17  *  - Critical limit for remote temperature can be changed only once. We
  18  *    will consider that the critical limit is read-only.
  19  *
  20  * The datasheet isn't very clear about what the tachometer reading is.
  21  * I had a explanation from National Semiconductor though. The two lower
  22  * bits of the read value have to be masked out. The value is still 16 bit
  23  * in width.
  24  *
  25  * This program is free software; you can redistribute it and/or modify
  26  * it under the terms of the GNU General Public License as published by
  27  * the Free Software Foundation; either version 2 of the License, or
  28  * (at your option) any later version.
  29  *
  30  * This program is distributed in the hope that it will be useful,
  31  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  33  * GNU General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software
  37  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  38  */
  39
  40 #include <linux/module.h>
  41 #include <linux/init.h>
  42 #include <linux/slab.h>
  43 #include <linux/jiffies.h>
  44 #include <linux/i2c.h>
  45 #include <linux/hwmon-sysfs.h>
  46 #include <linux/hwmon.h>
  47 #include <linux/err.h>
  48 #include <linux/mutex.h>
  49 #include <linux/sysfs.h>
  50
  51 /*
  52  * Addresses to scan
  53  * Address is fully defined internally and cannot be changed.
  54  */
  55
  56 static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
  57
  58 /*
  59  * Insmod parameters
  60  */
  61
  62 I2C_CLIENT_INSMOD_1(lm63);
  63
  64 /*
  65  * The LM63 registers
  66  */
  67
  68 #define LM63_REG_CONFIG1                0x03
  69 #define LM63_REG_CONFIG2                0xBF
  70 #define LM63_REG_CONFIG_FAN             0x4A
  71
  72 #define LM63_REG_TACH_COUNT_MSB         0x47
  73 #define LM63_REG_TACH_COUNT_LSB         0x46
  74 #define LM63_REG_TACH_LIMIT_MSB         0x49
  75 #define LM63_REG_TACH_LIMIT_LSB         0x48
  76
  77 #define LM63_REG_PWM_VALUE              0x4C
  78 #define LM63_REG_PWM_FREQ               0x4D
  79
  80 #define LM63_REG_LOCAL_TEMP             0x00
  81 #define LM63_REG_LOCAL_HIGH             0x05
  82
  83 #define LM63_REG_REMOTE_TEMP_MSB        0x01
  84 #define LM63_REG_REMOTE_TEMP_LSB        0x10
  85 #define LM63_REG_REMOTE_OFFSET_MSB      0x11
  86 #define LM63_REG_REMOTE_OFFSET_LSB      0x12
  87 #define LM63_REG_REMOTE_HIGH_MSB        0x07
  88 #define LM63_REG_REMOTE_HIGH_LSB        0x13
  89 #define LM63_REG_REMOTE_LOW_MSB         0x08
  90 #define LM63_REG_REMOTE_LOW_LSB         0x14
  91 #define LM63_REG_REMOTE_TCRIT           0x19
  92 #define LM63_REG_REMOTE_TCRIT_HYST      0x21
  93
  94 #define LM63_REG_ALERT_STATUS           0x02
  95 #define LM63_REG_ALERT_MASK             0x16
  96
  97 #define LM63_REG_MAN_ID                 0xFE
  98 #define LM63_REG_CHIP_ID                0xFF
  99
 100 /*
 101  * Conversions and various macros
 102  * For tachometer counts, the LM63 uses 16-bit values.
 103  * For local temperature and high limit, remote critical limit and hysteresis
 104  * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
 105  * For remote temperature, low and high limits, it uses signed 11-bit values
 106  * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 107  */
 108
 109 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 110                                  5400000 / (reg))
 111 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 112                                  (5400000 / (val)) & 0xFFFC)
 113 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 114 #define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 115                                  (val) >= 127000 ? 127 : \
 116                                  (val) < 0 ? ((val) - 500) / 1000 : \
 117                                  ((val) + 500) / 1000)
 118 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 119 #define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 120                                  (val) >= 127875 ? 0x7FE0 : \
 121                                  (val) < 0 ? ((val) - 62) / 125 * 32 : \
 122                                  ((val) + 62) / 125 * 32)
 123 #define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 124                                  (val) >= 127000 ? 127 : \
 125                                  ((val) + 500) / 1000)
 126
 127 /*
 128  * Functions declaration
 129  */
 130
 131 static int lm63_probe(struct i2c_client *client,
 132                       const struct i2c_device_id *id);
 133 static int lm63_remove(struct i2c_client *client);
 134
 135 static struct lm63_data *lm63_update_device(struct device *dev);
 136
 137 static int lm63_detect(struct i2c_client *client, int kind,
 138                        struct i2c_board_info *info);
 139 static void lm63_init_client(struct i2c_client *client);
 140
 141 /*
 142  * Driver data (common to all clients)
 143  */
 144
 145 static const struct i2c_device_id lm63_id[] = {
 146         { "lm63", lm63 },
 147         { }
 148 };
 149 MODULE_DEVICE_TABLE(i2c, lm63_id);
 150
 151 static struct i2c_driver lm63_driver = {
 152         .class          = I2C_CLASS_HWMON,
 153         .driver = {
 154                 .name   = "lm63",
 155         },
 156         .probe          = lm63_probe,
 157         .remove         = lm63_remove,
 158         .id_table       = lm63_id,
 159         .detect         = lm63_detect,
 160         .address_data   = &addr_data,
 161 };
 162
 163 /*
 164  * Client data (each client gets its own)
 165  */
 166
 167 struct lm63_data {
 168         struct device *hwmon_dev;
 169         struct mutex update_lock;
 170         char valid; /* zero until following fields are valid */
 171         unsigned long last_updated; /* in jiffies */
 172
 173         /* registers values */
 174         u8 config, config_fan;
 175         u16 fan[2];     /* 0: input
 176                            1: low limit */
 177         u8 pwm1_freq;
 178         u8 pwm1_value;
 179         s8 temp8[3];    /* 0: local input
 180                            1: local high limit
 181                            2: remote critical limit */
 182         s16 temp11[3];  /* 0: remote input
 183                            1: remote low limit
 184                            2: remote high limit */
 185         u8 temp2_crit_hyst;
 186         u8 alarms;
 187 };
 188
 189 /*
 190  * Sysfs callback functions and files
 191  */
 192
 193 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 194                         char *buf)
 195 {
 196         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 197         struct lm63_data *data = lm63_update_device(dev);
 198         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 199 }
 200
 201 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 202                        const char *buf, size_t count)
 203 {
 204         struct i2c_client *client = to_i2c_client(dev);
 205         struct lm63_data *data = i2c_get_clientdata(client);
 206         unsigned long val = simple_strtoul(buf, NULL, 10);
 207
 208         mutex_lock(&data->update_lock);
 209         data->fan[1] = FAN_TO_REG(val);
 210         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 211                                   data->fan[1] & 0xFF);
 212         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 213                                   data->fan[1] >> 8);
 214         mutex_unlock(&data->update_lock);
 215         return count;
 216 }
 217
 218 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 219                          char *buf)
 220 {
 221         struct lm63_data *data = lm63_update_device(dev);
 222         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 223                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 224                        (2 * data->pwm1_freq));
 225 }
 226
 227 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 228                         const char *buf, size_t count)
 229 {
 230         struct i2c_client *client = to_i2c_client(dev);
 231         struct lm63_data *data = i2c_get_clientdata(client);
 232         unsigned long val;
 233
 234         if (!(data->config_fan & 0x20)) /* register is read-only */
 235                 return -EPERM;
 236
 237         val = simple_strtoul(buf, NULL, 10);
 238         mutex_lock(&data->update_lock);
 239         data->pwm1_value = val <= 0 ? 0 :
 240                            val >= 255 ? 2 * data->pwm1_freq :
 241                            (val * data->pwm1_freq * 2 + 127) / 255;
 242         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 243         mutex_unlock(&data->update_lock);
 244         return count;
 245 }
 246
 247 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
 248                                 char *buf)
 249 {
 250         struct lm63_data *data = lm63_update_device(dev);
 251         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 252 }
 253
 254 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
 255                           char *buf)
 256 {
 257         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 258         struct lm63_data *data = lm63_update_device(dev);
 259         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 260 }
 261
 262 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
 263                          const char *buf, size_t count)
 264 {
 265         struct i2c_client *client = to_i2c_client(dev);
 266         struct lm63_data *data = i2c_get_clientdata(client);
 267         long val = simple_strtol(buf, NULL, 10);
 268
 269         mutex_lock(&data->update_lock);
 270         data->temp8[1] = TEMP8_TO_REG(val);
 271         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 272         mutex_unlock(&data->update_lock);
 273         return count;
 274 }
 275
 276 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 277                            char *buf)
 278 {
 279         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 280         struct lm63_data *data = lm63_update_device(dev);
 281         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
 282 }
 283
 284 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 285                           const char *buf, size_t count)
 286 {
 287         static const u8 reg[4] = {
 288                 LM63_REG_REMOTE_LOW_MSB,
 289                 LM63_REG_REMOTE_LOW_LSB,
 290                 LM63_REG_REMOTE_HIGH_MSB,
 291                 LM63_REG_REMOTE_HIGH_LSB,
 292         };
 293
 294         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 295         struct i2c_client *client = to_i2c_client(dev);
 296         struct lm63_data *data = i2c_get_clientdata(client);
 297         long val = simple_strtol(buf, NULL, 10);
 298         int nr = attr->index;
 299
 300         mutex_lock(&data->update_lock);
 301         data->temp11[nr] = TEMP11_TO_REG(val);
 302         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 303                                   data->temp11[nr] >> 8);
 304         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 305                                   data->temp11[nr] & 0xff);
 306         mutex_unlock(&data->update_lock);
 307         return count;
 308 }
 309
 310 /* Hysteresis register holds a relative value, while we want to present
 311    an absolute to user-space */
 312 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 313                                     char *buf)
 314 {
 315         struct lm63_data *data = lm63_update_device(dev);
 316         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 317                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 318 }
 319
 320 /* And now the other way around, user-space provides an absolute
 321    hysteresis value and we have to store a relative one */
 322 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 323                                    const char *buf, size_t count)
 324 {
 325         struct i2c_client *client = to_i2c_client(dev);
 326         struct lm63_data *data = i2c_get_clientdata(client);
 327         long val = simple_strtol(buf, NULL, 10);
 328         long hyst;
 329
 330         mutex_lock(&data->update_lock);
 331         hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
 332         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 333                                   HYST_TO_REG(hyst));
 334         mutex_unlock(&data->update_lock);
 335         return count;
 336 }
 337
 338 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 339                            char *buf)
 340 {
 341         struct lm63_data *data = lm63_update_device(dev);
 342         return sprintf(buf, "%u\n", data->alarms);
 343 }
 344
 345 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 346                           char *buf)
 347 {
 348         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 349         struct lm63_data *data = lm63_update_device(dev);
 350         int bitnr = attr->index;
 351
 352         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 353 }
 354
 355 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 356 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 357         set_fan, 1);
 358
 359 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 360 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 361
 362 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
 363 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
 364         set_temp8, 1);
 365
 366 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 367 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 368         set_temp11, 1);
 369 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 370         set_temp11, 2);
 371 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
 372 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 373         set_temp2_crit_hyst);
 374
 375 /* Individual alarm files */
 376 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 377 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 378 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 379 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 380 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 381 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 382 /* Raw alarm file for compatibility */
 383 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 384
 385 static struct attribute *lm63_attributes[] = {
 386         &dev_attr_pwm1.attr,
 387         &dev_attr_pwm1_enable.attr,
 388         &sensor_dev_attr_temp1_input.dev_attr.attr,
 389         &sensor_dev_attr_temp2_input.dev_attr.attr,
 390         &sensor_dev_attr_temp2_min.dev_attr.attr,
 391         &sensor_dev_attr_temp1_max.dev_attr.attr,
 392         &sensor_dev_attr_temp2_max.dev_attr.attr,
 393         &sensor_dev_attr_temp2_crit.dev_attr.attr,
 394         &dev_attr_temp2_crit_hyst.attr,
 395
 396         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 397         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 398         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 399         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 400         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 401         &dev_attr_alarms.attr,
 402         NULL
 403 };
 404
 405 static const struct attribute_group lm63_group = {
 406         .attrs = lm63_attributes,
 407 };
 408
 409 static struct attribute *lm63_attributes_fan1[] = {
 410         &sensor_dev_attr_fan1_input.dev_attr.attr,
 411         &sensor_dev_attr_fan1_min.dev_attr.attr,
 412
 413         &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 414         NULL
 415 };
 416
 417 static const struct attribute_group lm63_group_fan1 = {
 418         .attrs = lm63_attributes_fan1,
 419 };
 420
 421 /*
 422  * Real code
 423  */
 424
 425 /* Return 0 if detection is successful, -ENODEV otherwise */
 426 static int lm63_detect(struct i2c_client *new_client, int kind,
 427                        struct i2c_board_info *info)
 428 {
 429         struct i2c_adapter *adapter = new_client->adapter;
 430         u8 man_id, chip_id, reg_config1, reg_config2;
 431         u8 reg_alert_status, reg_alert_mask;
 432
 433         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 434                 return -ENODEV;
 435
 436         man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
 437         chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
 438
 439         reg_config1 = i2c_smbus_read_byte_data(new_client,
 440                       LM63_REG_CONFIG1);
 441         reg_config2 = i2c_smbus_read_byte_data(new_client,
 442                       LM63_REG_CONFIG2);
 443         reg_alert_status = i2c_smbus_read_byte_data(new_client,
 444                            LM63_REG_ALERT_STATUS);
 445         reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 446                          LM63_REG_ALERT_MASK);
 447
 448         if (man_id != 0x01 /* National Semiconductor */
 449          || chip_id != 0x41 /* LM63 */
 450          || (reg_config1 & 0x18) != 0x00
 451          || (reg_config2 & 0xF8) != 0x00
 452          || (reg_alert_status & 0x20) != 0x00
 453          || (reg_alert_mask & 0xA4) != 0xA4) {
 454                 dev_dbg(&adapter->dev,
 455                         "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
 456                         man_id, chip_id);
 457                 return -ENODEV;
 458         }
 459
 460         strlcpy(info->type, "lm63", I2C_NAME_SIZE);
 461
 462         return 0;
 463 }
 464
 465 static int lm63_probe(struct i2c_client *new_client,
 466                       const struct i2c_device_id *id)
 467 {
 468         struct lm63_data *data;
 469         int err;
 470
 471         data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
 472         if (!data) {
 473                 err = -ENOMEM;
 474                 goto exit;
 475         }
 476
 477         i2c_set_clientdata(new_client, data);
 478         data->valid = 0;
 479         mutex_init(&data->update_lock);
 480
 481         /* Initialize the LM63 chip */
 482         lm63_init_client(new_client);
 483
 484         /* Register sysfs hooks */
 485         if ((err = sysfs_create_group(&new_client->dev.kobj,
 486                                       &lm63_group)))
 487                 goto exit_free;
 488         if (data->config & 0x04) { /* tachometer enabled */
 489                 if ((err = sysfs_create_group(&new_client->dev.kobj,
 490                                               &lm63_group_fan1)))
 491                         goto exit_remove_files;
 492         }
 493
 494         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 495         if (IS_ERR(data->hwmon_dev)) {
 496                 err = PTR_ERR(data->hwmon_dev);
 497                 goto exit_remove_files;
 498         }
 499
 500         return 0;
 501
 502 exit_remove_files:
 503         sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
 504         sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
 505 exit_free:
 506         kfree(data);
 507 exit:
 508         return err;
 509 }
 510
 511 /* Idealy we shouldn't have to initialize anything, since the BIOS
 512    should have taken care of everything */
 513 static void lm63_init_client(struct i2c_client *client)
 514 {
 515         struct lm63_data *data = i2c_get_clientdata(client);
 516
 517         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 518         data->config_fan = i2c_smbus_read_byte_data(client,
 519                                                     LM63_REG_CONFIG_FAN);
 520
 521         /* Start converting if needed */
 522         if (data->config & 0x40) { /* standby */
 523                 dev_dbg(&client->dev, "Switching to operational mode\n");
 524                 data->config &= 0xA7;
 525                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 526                                           data->config);
 527         }
 528
 529         /* We may need pwm1_freq before ever updating the client data */
 530         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 531         if (data->pwm1_freq == 0)
 532                 data->pwm1_freq = 1;
 533
 534         /* Show some debug info about the LM63 configuration */
 535         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 536                 (data->config & 0x04) ? "tachometer input" :
 537                 "alert output");
 538         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 539                 (data->config_fan & 0x08) ? "1.4" : "360",
 540                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 541         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 542                 (data->config_fan & 0x10) ? "low" : "high",
 543                 (data->config_fan & 0x20) ? "manual" : "auto");
 544 }
 545
 546 static int lm63_remove(struct i2c_client *client)
 547 {
 548         struct lm63_data *data = i2c_get_clientdata(client);
 549
 550         hwmon_device_unregister(data->hwmon_dev);
 551         sysfs_remove_group(&client->dev.kobj, &lm63_group);
 552         sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
 553
 554         kfree(data);
 555         return 0;
 556 }
 557
 558 static struct lm63_data *lm63_update_device(struct device *dev)
 559 {
 560         struct i2c_client *client = to_i2c_client(dev);
 561         struct lm63_data *data = i2c_get_clientdata(client);
 562
 563         mutex_lock(&data->update_lock);
 564
 565         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 566                 if (data->config & 0x04) { /* tachometer enabled  */
 567                         /* order matters for fan1_input */
 568                         data->fan[0] = i2c_smbus_read_byte_data(client,
 569                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 570                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 571                                         LM63_REG_TACH_COUNT_MSB) << 8;
 572                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 573                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 574                                      | (i2c_smbus_read_byte_data(client,
 575                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 576                 }
 577
 578                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 579                                   LM63_REG_PWM_FREQ);
 580                 if (data->pwm1_freq == 0)
 581                         data->pwm1_freq = 1;
 582                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 583                                    LM63_REG_PWM_VALUE);
 584
 585                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 586                                  LM63_REG_LOCAL_TEMP);
 587                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 588                                  LM63_REG_LOCAL_HIGH);
 589
 590                 /* order matters for temp2_input */
 591                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 592                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 593                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 594                                    LM63_REG_REMOTE_TEMP_LSB);
 595                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 596                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 597                                 | i2c_smbus_read_byte_data(client,
 598                                   LM63_REG_REMOTE_LOW_LSB);
 599                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 600                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 601                                 | i2c_smbus_read_byte_data(client,
 602                                   LM63_REG_REMOTE_HIGH_LSB);
 603                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 604                                  LM63_REG_REMOTE_TCRIT);
 605                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 606                                         LM63_REG_REMOTE_TCRIT_HYST);
 607
 608                 data->alarms = i2c_smbus_read_byte_data(client,
 609                                LM63_REG_ALERT_STATUS) & 0x7F;
 610
 611                 data->last_updated = jiffies;
 612                 data->valid = 1;
 613         }
 614
 615         mutex_unlock(&data->update_lock);
 616
 617         return data;
 618 }
 619
 620 static int __init sensors_lm63_init(void)
 621 {
 622         return i2c_add_driver(&lm63_driver);
 623 }
 624
 625 static void __exit sensors_lm63_exit(void)
 626 {
 627         i2c_del_driver(&lm63_driver);
 628 }
 629
 630 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 631 MODULE_DESCRIPTION("LM63 driver");
 632 MODULE_LICENSE("GPL");
 633
 634 module_init(sensors_lm63_init);
 635 module_exit(sensors_lm63_exit);