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  * The LM63 registers
  60  */
  61
  62 #define LM63_REG_CONFIG1                0x03
  63 #define LM63_REG_CONFIG2                0xBF
  64 #define LM63_REG_CONFIG_FAN             0x4A
  65
  66 #define LM63_REG_TACH_COUNT_MSB         0x47
  67 #define LM63_REG_TACH_COUNT_LSB         0x46
  68 #define LM63_REG_TACH_LIMIT_MSB         0x49
  69 #define LM63_REG_TACH_LIMIT_LSB         0x48
  70
  71 #define LM63_REG_PWM_VALUE              0x4C
  72 #define LM63_REG_PWM_FREQ               0x4D
  73
  74 #define LM63_REG_LOCAL_TEMP             0x00
  75 #define LM63_REG_LOCAL_HIGH             0x05
  76
  77 #define LM63_REG_REMOTE_TEMP_MSB        0x01
  78 #define LM63_REG_REMOTE_TEMP_LSB        0x10
  79 #define LM63_REG_REMOTE_OFFSET_MSB      0x11
  80 #define LM63_REG_REMOTE_OFFSET_LSB      0x12
  81 #define LM63_REG_REMOTE_HIGH_MSB        0x07
  82 #define LM63_REG_REMOTE_HIGH_LSB        0x13
  83 #define LM63_REG_REMOTE_LOW_MSB         0x08
  84 #define LM63_REG_REMOTE_LOW_LSB         0x14
  85 #define LM63_REG_REMOTE_TCRIT           0x19
  86 #define LM63_REG_REMOTE_TCRIT_HYST      0x21
  87
  88 #define LM63_REG_ALERT_STATUS           0x02
  89 #define LM63_REG_ALERT_MASK             0x16
  90
  91 #define LM63_REG_MAN_ID                 0xFE
  92 #define LM63_REG_CHIP_ID                0xFF
  93
  94 /*
  95  * Conversions and various macros
  96  * For tachometer counts, the LM63 uses 16-bit values.
  97  * For local temperature and high limit, remote critical limit and hysteresis
  98  * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
  99  * For remote temperature, low and high limits, it uses signed 11-bit values
 100  * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 101  */
 102
 103 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 104                                  5400000 / (reg))
 105 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 106                                  (5400000 / (val)) & 0xFFFC)
 107 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 108 #define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 109                                  (val) >= 127000 ? 127 : \
 110                                  (val) < 0 ? ((val) - 500) / 1000 : \
 111                                  ((val) + 500) / 1000)
 112 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 113 #define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 114                                  (val) >= 127875 ? 0x7FE0 : \
 115                                  (val) < 0 ? ((val) - 62) / 125 * 32 : \
 116                                  ((val) + 62) / 125 * 32)
 117 #define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 118                                  (val) >= 127000 ? 127 : \
 119                                  ((val) + 500) / 1000)
 120
 121 /*
 122  * Functions declaration
 123  */
 124
 125 static int lm63_probe(struct i2c_client *client,
 126                       const struct i2c_device_id *id);
 127 static int lm63_remove(struct i2c_client *client);
 128
 129 static struct lm63_data *lm63_update_device(struct device *dev);
 130
 131 static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
 132 static void lm63_init_client(struct i2c_client *client);
 133
 134 /*
 135  * Driver data (common to all clients)
 136  */
 137
 138 static const struct i2c_device_id lm63_id[] = {
 139         { "lm63", 0 },
 140         { }
 141 };
 142 MODULE_DEVICE_TABLE(i2c, lm63_id);
 143
 144 static struct i2c_driver lm63_driver = {
 145         .class          = I2C_CLASS_HWMON,
 146         .driver = {
 147                 .name   = "lm63",
 148         },
 149         .probe          = lm63_probe,
 150         .remove         = lm63_remove,
 151         .id_table       = lm63_id,
 152         .detect         = lm63_detect,
 153         .address_list   = normal_i2c,
 154 };
 155
 156 /*
 157  * Client data (each client gets its own)
 158  */
 159
 160 struct lm63_data {
 161         struct device *hwmon_dev;
 162         struct mutex update_lock;
 163         char valid; /* zero until following fields are valid */
 164         unsigned long last_updated; /* in jiffies */
 165
 166         /* registers values */
 167         u8 config, config_fan;
 168         u16 fan[2];     /* 0: input
 169                            1: low limit */
 170         u8 pwm1_freq;
 171         u8 pwm1_value;
 172         s8 temp8[3];    /* 0: local input
 173                            1: local high limit
 174                            2: remote critical limit */
 175         s16 temp11[3];  /* 0: remote input
 176                            1: remote low limit
 177                            2: remote high limit */
 178         u8 temp2_crit_hyst;
 179         u8 alarms;
 180 };
 181
 182 /*
 183  * Sysfs callback functions and files
 184  */
 185
 186 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 187                         char *buf)
 188 {
 189         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 190         struct lm63_data *data = lm63_update_device(dev);
 191         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 192 }
 193
 194 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 195                        const char *buf, size_t count)
 196 {
 197         struct i2c_client *client = to_i2c_client(dev);
 198         struct lm63_data *data = i2c_get_clientdata(client);
 199         unsigned long val = simple_strtoul(buf, NULL, 10);
 200
 201         mutex_lock(&data->update_lock);
 202         data->fan[1] = FAN_TO_REG(val);
 203         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 204                                   data->fan[1] & 0xFF);
 205         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 206                                   data->fan[1] >> 8);
 207         mutex_unlock(&data->update_lock);
 208         return count;
 209 }
 210
 211 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 212                          char *buf)
 213 {
 214         struct lm63_data *data = lm63_update_device(dev);
 215         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 216                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 217                        (2 * data->pwm1_freq));
 218 }
 219
 220 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 221                         const char *buf, size_t count)
 222 {
 223         struct i2c_client *client = to_i2c_client(dev);
 224         struct lm63_data *data = i2c_get_clientdata(client);
 225         unsigned long val;
 226
 227         if (!(data->config_fan & 0x20)) /* register is read-only */
 228                 return -EPERM;
 229
 230         val = simple_strtoul(buf, NULL, 10);
 231         mutex_lock(&data->update_lock);
 232         data->pwm1_value = val <= 0 ? 0 :
 233                            val >= 255 ? 2 * data->pwm1_freq :
 234                            (val * data->pwm1_freq * 2 + 127) / 255;
 235         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 236         mutex_unlock(&data->update_lock);
 237         return count;
 238 }
 239
 240 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
 241                                 char *buf)
 242 {
 243         struct lm63_data *data = lm63_update_device(dev);
 244         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 245 }
 246
 247 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
 248                           char *buf)
 249 {
 250         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 251         struct lm63_data *data = lm63_update_device(dev);
 252         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 253 }
 254
 255 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
 256                          const char *buf, size_t count)
 257 {
 258         struct i2c_client *client = to_i2c_client(dev);
 259         struct lm63_data *data = i2c_get_clientdata(client);
 260         long val = simple_strtol(buf, NULL, 10);
 261
 262         mutex_lock(&data->update_lock);
 263         data->temp8[1] = TEMP8_TO_REG(val);
 264         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 265         mutex_unlock(&data->update_lock);
 266         return count;
 267 }
 268
 269 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 270                            char *buf)
 271 {
 272         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 273         struct lm63_data *data = lm63_update_device(dev);
 274         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
 275 }
 276
 277 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 278                           const char *buf, size_t count)
 279 {
 280         static const u8 reg[4] = {
 281                 LM63_REG_REMOTE_LOW_MSB,
 282                 LM63_REG_REMOTE_LOW_LSB,
 283                 LM63_REG_REMOTE_HIGH_MSB,
 284                 LM63_REG_REMOTE_HIGH_LSB,
 285         };
 286
 287         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 288         struct i2c_client *client = to_i2c_client(dev);
 289         struct lm63_data *data = i2c_get_clientdata(client);
 290         long val = simple_strtol(buf, NULL, 10);
 291         int nr = attr->index;
 292
 293         mutex_lock(&data->update_lock);
 294         data->temp11[nr] = TEMP11_TO_REG(val);
 295         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 296                                   data->temp11[nr] >> 8);
 297         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 298                                   data->temp11[nr] & 0xff);
 299         mutex_unlock(&data->update_lock);
 300         return count;
 301 }
 302
 303 /* Hysteresis register holds a relative value, while we want to present
 304    an absolute to user-space */
 305 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 306                                     char *buf)
 307 {
 308         struct lm63_data *data = lm63_update_device(dev);
 309         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 310                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 311 }
 312
 313 /* And now the other way around, user-space provides an absolute
 314    hysteresis value and we have to store a relative one */
 315 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 316                                    const char *buf, size_t count)
 317 {
 318         struct i2c_client *client = to_i2c_client(dev);
 319         struct lm63_data *data = i2c_get_clientdata(client);
 320         long val = simple_strtol(buf, NULL, 10);
 321         long hyst;
 322
 323         mutex_lock(&data->update_lock);
 324         hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
 325         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 326                                   HYST_TO_REG(hyst));
 327         mutex_unlock(&data->update_lock);
 328         return count;
 329 }
 330
 331 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 332                            char *buf)
 333 {
 334         struct lm63_data *data = lm63_update_device(dev);
 335         return sprintf(buf, "%u\n", data->alarms);
 336 }
 337
 338 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 339                           char *buf)
 340 {
 341         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 342         struct lm63_data *data = lm63_update_device(dev);
 343         int bitnr = attr->index;
 344
 345         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 346 }
 347
 348 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 349 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 350         set_fan, 1);
 351
 352 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 353 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 354
 355 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
 356 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
 357         set_temp8, 1);
 358
 359 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 360 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 361         set_temp11, 1);
 362 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 363         set_temp11, 2);
 364 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
 365 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 366         set_temp2_crit_hyst);
 367
 368 /* Individual alarm files */
 369 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 370 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 371 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 372 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 373 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 374 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 375 /* Raw alarm file for compatibility */
 376 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 377
 378 static struct attribute *lm63_attributes[] = {
 379         &dev_attr_pwm1.attr,
 380         &dev_attr_pwm1_enable.attr,
 381         &sensor_dev_attr_temp1_input.dev_attr.attr,
 382         &sensor_dev_attr_temp2_input.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_temp2_crit.dev_attr.attr,
 387         &dev_attr_temp2_crit_hyst.attr,
 388
 389         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 390         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 391         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 392         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 393         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 394         &dev_attr_alarms.attr,
 395         NULL
 396 };
 397
 398 static const struct attribute_group lm63_group = {
 399         .attrs = lm63_attributes,
 400 };
 401
 402 static struct attribute *lm63_attributes_fan1[] = {
 403         &sensor_dev_attr_fan1_input.dev_attr.attr,
 404         &sensor_dev_attr_fan1_min.dev_attr.attr,
 405
 406         &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 407         NULL
 408 };
 409
 410 static const struct attribute_group lm63_group_fan1 = {
 411         .attrs = lm63_attributes_fan1,
 412 };
 413
 414 /*
 415  * Real code
 416  */
 417
 418 /* Return 0 if detection is successful, -ENODEV otherwise */
 419 static int lm63_detect(struct i2c_client *new_client,
 420                        struct i2c_board_info *info)
 421 {
 422         struct i2c_adapter *adapter = new_client->adapter;
 423         u8 man_id, chip_id, reg_config1, reg_config2;
 424         u8 reg_alert_status, reg_alert_mask;
 425
 426         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 427                 return -ENODEV;
 428
 429         man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
 430         chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
 431
 432         reg_config1 = i2c_smbus_read_byte_data(new_client,
 433                       LM63_REG_CONFIG1);
 434         reg_config2 = i2c_smbus_read_byte_data(new_client,
 435                       LM63_REG_CONFIG2);
 436         reg_alert_status = i2c_smbus_read_byte_data(new_client,
 437                            LM63_REG_ALERT_STATUS);
 438         reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 439                          LM63_REG_ALERT_MASK);
 440
 441         if (man_id != 0x01 /* National Semiconductor */
 442          || chip_id != 0x41 /* LM63 */
 443          || (reg_config1 & 0x18) != 0x00
 444          || (reg_config2 & 0xF8) != 0x00
 445          || (reg_alert_status & 0x20) != 0x00
 446          || (reg_alert_mask & 0xA4) != 0xA4) {
 447                 dev_dbg(&adapter->dev,
 448                         "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
 449                         man_id, chip_id);
 450                 return -ENODEV;
 451         }
 452
 453         strlcpy(info->type, "lm63", I2C_NAME_SIZE);
 454
 455         return 0;
 456 }
 457
 458 static int lm63_probe(struct i2c_client *new_client,
 459                       const struct i2c_device_id *id)
 460 {
 461         struct lm63_data *data;
 462         int err;
 463
 464         data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
 465         if (!data) {
 466                 err = -ENOMEM;
 467                 goto exit;
 468         }
 469
 470         i2c_set_clientdata(new_client, data);
 471         data->valid = 0;
 472         mutex_init(&data->update_lock);
 473
 474         /* Initialize the LM63 chip */
 475         lm63_init_client(new_client);
 476
 477         /* Register sysfs hooks */
 478         if ((err = sysfs_create_group(&new_client->dev.kobj,
 479                                       &lm63_group)))
 480                 goto exit_free;
 481         if (data->config & 0x04) { /* tachometer enabled */
 482                 if ((err = sysfs_create_group(&new_client->dev.kobj,
 483                                               &lm63_group_fan1)))
 484                         goto exit_remove_files;
 485         }
 486
 487         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 488         if (IS_ERR(data->hwmon_dev)) {
 489                 err = PTR_ERR(data->hwmon_dev);
 490                 goto exit_remove_files;
 491         }
 492
 493         return 0;
 494
 495 exit_remove_files:
 496         sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
 497         sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
 498 exit_free:
 499         kfree(data);
 500 exit:
 501         return err;
 502 }
 503
 504 /* Idealy we shouldn't have to initialize anything, since the BIOS
 505    should have taken care of everything */
 506 static void lm63_init_client(struct i2c_client *client)
 507 {
 508         struct lm63_data *data = i2c_get_clientdata(client);
 509
 510         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 511         data->config_fan = i2c_smbus_read_byte_data(client,
 512                                                     LM63_REG_CONFIG_FAN);
 513
 514         /* Start converting if needed */
 515         if (data->config & 0x40) { /* standby */
 516                 dev_dbg(&client->dev, "Switching to operational mode\n");
 517                 data->config &= 0xA7;
 518                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 519                                           data->config);
 520         }
 521
 522         /* We may need pwm1_freq before ever updating the client data */
 523         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 524         if (data->pwm1_freq == 0)
 525                 data->pwm1_freq = 1;
 526
 527         /* Show some debug info about the LM63 configuration */
 528         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 529                 (data->config & 0x04) ? "tachometer input" :
 530                 "alert output");
 531         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 532                 (data->config_fan & 0x08) ? "1.4" : "360",
 533                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 534         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 535                 (data->config_fan & 0x10) ? "low" : "high",
 536                 (data->config_fan & 0x20) ? "manual" : "auto");
 537 }
 538
 539 static int lm63_remove(struct i2c_client *client)
 540 {
 541         struct lm63_data *data = i2c_get_clientdata(client);
 542
 543         hwmon_device_unregister(data->hwmon_dev);
 544         sysfs_remove_group(&client->dev.kobj, &lm63_group);
 545         sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
 546
 547         kfree(data);
 548         return 0;
 549 }
 550
 551 static struct lm63_data *lm63_update_device(struct device *dev)
 552 {
 553         struct i2c_client *client = to_i2c_client(dev);
 554         struct lm63_data *data = i2c_get_clientdata(client);
 555
 556         mutex_lock(&data->update_lock);
 557
 558         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 559                 if (data->config & 0x04) { /* tachometer enabled  */
 560                         /* order matters for fan1_input */
 561                         data->fan[0] = i2c_smbus_read_byte_data(client,
 562                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 563                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 564                                         LM63_REG_TACH_COUNT_MSB) << 8;
 565                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 566                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 567                                      | (i2c_smbus_read_byte_data(client,
 568                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 569                 }
 570
 571                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 572                                   LM63_REG_PWM_FREQ);
 573                 if (data->pwm1_freq == 0)
 574                         data->pwm1_freq = 1;
 575                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 576                                    LM63_REG_PWM_VALUE);
 577
 578                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 579                                  LM63_REG_LOCAL_TEMP);
 580                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 581                                  LM63_REG_LOCAL_HIGH);
 582
 583                 /* order matters for temp2_input */
 584                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 585                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 586                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 587                                    LM63_REG_REMOTE_TEMP_LSB);
 588                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 589                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 590                                 | i2c_smbus_read_byte_data(client,
 591                                   LM63_REG_REMOTE_LOW_LSB);
 592                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 593                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 594                                 | i2c_smbus_read_byte_data(client,
 595                                   LM63_REG_REMOTE_HIGH_LSB);
 596                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 597                                  LM63_REG_REMOTE_TCRIT);
 598                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 599                                         LM63_REG_REMOTE_TCRIT_HYST);
 600
 601                 data->alarms = i2c_smbus_read_byte_data(client,
 602                                LM63_REG_ALERT_STATUS) & 0x7F;
 603
 604                 data->last_updated = jiffies;
 605                 data->valid = 1;
 606         }
 607
 608         mutex_unlock(&data->update_lock);
 609
 610         return data;
 611 }
 612
 613 static int __init sensors_lm63_init(void)
 614 {
 615         return i2c_add_driver(&lm63_driver);
 616 }
 617
 618 static void __exit sensors_lm63_exit(void)
 619 {
 620         i2c_del_driver(&lm63_driver);
 621 }
 622
 623 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 624 MODULE_DESCRIPTION("LM63 driver");
 625 MODULE_LICENSE("GPL");
 626
 627 module_init(sensors_lm63_init);
 628 module_exit(sensors_lm63_exit);