drivers/hwmon/lm63.c

   1 /*
   2  * lm63.c - driver for the National Semiconductor LM63 temperature sensor
   3  *          with integrated fan control
   4  * Copyright (C) 2004-2006  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 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_attach_adapter(struct i2c_adapter *adapter);
 132 static int lm63_detach_client(struct i2c_client *client);
 133
 134 static struct lm63_data *lm63_update_device(struct device *dev);
 135
 136 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
 137 static void lm63_init_client(struct i2c_client *client);
 138
 139 /*
 140  * Driver data (common to all clients)
 141  */
 142
 143 static struct i2c_driver lm63_driver = {
 144         .driver = {
 145                 .name   = "lm63",
 146         },
 147         .attach_adapter = lm63_attach_adapter,
 148         .detach_client  = lm63_detach_client,
 149 };
 150
 151 /*
 152  * Client data (each client gets its own)
 153  */
 154
 155 struct lm63_data {
 156         struct i2c_client client;
 157         struct device *hwmon_dev;
 158         struct mutex update_lock;
 159         char valid; /* zero until following fields are valid */
 160         unsigned long last_updated; /* in jiffies */
 161
 162         /* registers values */
 163         u8 config, config_fan;
 164         u16 fan[2];     /* 0: input
 165                            1: low limit */
 166         u8 pwm1_freq;
 167         u8 pwm1_value;
 168         s8 temp8[3];    /* 0: local input
 169                            1: local high limit
 170                            2: remote critical limit */
 171         s16 temp11[3];  /* 0: remote input
 172                            1: remote low limit
 173                            2: remote high limit */
 174         u8 temp2_crit_hyst;
 175         u8 alarms;
 176 };
 177
 178 /*
 179  * Sysfs callback functions and files
 180  */
 181
 182 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 183                         char *buf)
 184 {
 185         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 186         struct lm63_data *data = lm63_update_device(dev);
 187         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 188 }
 189
 190 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 191                        const char *buf, size_t count)
 192 {
 193         struct i2c_client *client = to_i2c_client(dev);
 194         struct lm63_data *data = i2c_get_clientdata(client);
 195         unsigned long val = simple_strtoul(buf, NULL, 10);
 196
 197         mutex_lock(&data->update_lock);
 198         data->fan[1] = FAN_TO_REG(val);
 199         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 200                                   data->fan[1] & 0xFF);
 201         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 202                                   data->fan[1] >> 8);
 203         mutex_unlock(&data->update_lock);
 204         return count;
 205 }
 206
 207 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 208                          char *buf)
 209 {
 210         struct lm63_data *data = lm63_update_device(dev);
 211         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 212                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 213                        (2 * data->pwm1_freq));
 214 }
 215
 216 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 217                         const char *buf, size_t count)
 218 {
 219         struct i2c_client *client = to_i2c_client(dev);
 220         struct lm63_data *data = i2c_get_clientdata(client);
 221         unsigned long val;
 222
 223         if (!(data->config_fan & 0x20)) /* register is read-only */
 224                 return -EPERM;
 225
 226         val = simple_strtoul(buf, NULL, 10);
 227         mutex_lock(&data->update_lock);
 228         data->pwm1_value = val <= 0 ? 0 :
 229                            val >= 255 ? 2 * data->pwm1_freq :
 230                            (val * data->pwm1_freq * 2 + 127) / 255;
 231         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 232         mutex_unlock(&data->update_lock);
 233         return count;
 234 }
 235
 236 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
 237                                 char *buf)
 238 {
 239         struct lm63_data *data = lm63_update_device(dev);
 240         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 241 }
 242
 243 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
 244                           char *buf)
 245 {
 246         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 247         struct lm63_data *data = lm63_update_device(dev);
 248         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 249 }
 250
 251 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
 252                          const char *buf, size_t count)
 253 {
 254         struct i2c_client *client = to_i2c_client(dev);
 255         struct lm63_data *data = i2c_get_clientdata(client);
 256         long val = simple_strtol(buf, NULL, 10);
 257
 258         mutex_lock(&data->update_lock);
 259         data->temp8[1] = TEMP8_TO_REG(val);
 260         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 261         mutex_unlock(&data->update_lock);
 262         return count;
 263 }
 264
 265 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 266                            char *buf)
 267 {
 268         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 269         struct lm63_data *data = lm63_update_device(dev);
 270         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
 271 }
 272
 273 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 274                           const char *buf, size_t count)
 275 {
 276         static const u8 reg[4] = {
 277                 LM63_REG_REMOTE_LOW_MSB,
 278                 LM63_REG_REMOTE_LOW_LSB,
 279                 LM63_REG_REMOTE_HIGH_MSB,
 280                 LM63_REG_REMOTE_HIGH_LSB,
 281         };
 282
 283         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 284         struct i2c_client *client = to_i2c_client(dev);
 285         struct lm63_data *data = i2c_get_clientdata(client);
 286         long val = simple_strtol(buf, NULL, 10);
 287         int nr = attr->index;
 288
 289         mutex_lock(&data->update_lock);
 290         data->temp11[nr] = TEMP11_TO_REG(val);
 291         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 292                                   data->temp11[nr] >> 8);
 293         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 294                                   data->temp11[nr] & 0xff);
 295         mutex_unlock(&data->update_lock);
 296         return count;
 297 }
 298
 299 /* Hysteresis register holds a relative value, while we want to present
 300    an absolute to user-space */
 301 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 302                                     char *buf)
 303 {
 304         struct lm63_data *data = lm63_update_device(dev);
 305         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 306                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 307 }
 308
 309 /* And now the other way around, user-space provides an absolute
 310    hysteresis value and we have to store a relative one */
 311 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 312                                    const char *buf, size_t count)
 313 {
 314         struct i2c_client *client = to_i2c_client(dev);
 315         struct lm63_data *data = i2c_get_clientdata(client);
 316         long val = simple_strtol(buf, NULL, 10);
 317         long hyst;
 318
 319         mutex_lock(&data->update_lock);
 320         hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
 321         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 322                                   HYST_TO_REG(hyst));
 323         mutex_unlock(&data->update_lock);
 324         return count;
 325 }
 326
 327 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 328                            char *buf)
 329 {
 330         struct lm63_data *data = lm63_update_device(dev);
 331         return sprintf(buf, "%u\n", data->alarms);
 332 }
 333
 334 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 335                           char *buf)
 336 {
 337         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 338         struct lm63_data *data = lm63_update_device(dev);
 339         int bitnr = attr->index;
 340
 341         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 342 }
 343
 344 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 345 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 346         set_fan, 1);
 347
 348 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 349 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 350
 351 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
 352 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
 353         set_temp8, 1);
 354
 355 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 356 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 357         set_temp11, 1);
 358 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 359         set_temp11, 2);
 360 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
 361 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 362         set_temp2_crit_hyst);
 363
 364 /* Individual alarm files */
 365 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 366 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 367 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 368 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 369 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 370 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 371 /* Raw alarm file for compatibility */
 372 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 373
 374 static struct attribute *lm63_attributes[] = {
 375         &dev_attr_pwm1.attr,
 376         &dev_attr_pwm1_enable.attr,
 377         &sensor_dev_attr_temp1_input.dev_attr.attr,
 378         &sensor_dev_attr_temp2_input.dev_attr.attr,
 379         &sensor_dev_attr_temp2_min.dev_attr.attr,
 380         &sensor_dev_attr_temp1_max.dev_attr.attr,
 381         &sensor_dev_attr_temp2_max.dev_attr.attr,
 382         &sensor_dev_attr_temp2_crit.dev_attr.attr,
 383         &dev_attr_temp2_crit_hyst.attr,
 384
 385         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 386         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 387         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 388         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 389         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 390         &dev_attr_alarms.attr,
 391         NULL
 392 };
 393
 394 static const struct attribute_group lm63_group = {
 395         .attrs = lm63_attributes,
 396 };
 397
 398 static struct attribute *lm63_attributes_fan1[] = {
 399         &sensor_dev_attr_fan1_input.dev_attr.attr,
 400         &sensor_dev_attr_fan1_min.dev_attr.attr,
 401
 402         &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 403         NULL
 404 };
 405
 406 static const struct attribute_group lm63_group_fan1 = {
 407         .attrs = lm63_attributes_fan1,
 408 };
 409
 410 /*
 411  * Real code
 412  */
 413
 414 static int lm63_attach_adapter(struct i2c_adapter *adapter)
 415 {
 416         if (!(adapter->class & I2C_CLASS_HWMON))
 417                 return 0;
 418         return i2c_probe(adapter, &addr_data, lm63_detect);
 419 }
 420
 421 /*
 422  * The following function does more than just detection. If detection
 423  * succeeds, it also registers the new chip.
 424  */
 425 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
 426 {
 427         struct i2c_client *new_client;
 428         struct lm63_data *data;
 429         int err = 0;
 430
 431         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 432                 goto exit;
 433
 434         if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
 435                 err = -ENOMEM;
 436                 goto exit;
 437         }
 438
 439         /* The common I2C client data is placed right before the
 440            LM63-specific data. */
 441         new_client = &data->client;
 442         i2c_set_clientdata(new_client, data);
 443         new_client->addr = address;
 444         new_client->adapter = adapter;
 445         new_client->driver = &lm63_driver;
 446         new_client->flags = 0;
 447
 448         /* Default to an LM63 if forced */
 449         if (kind == 0)
 450                 kind = lm63;
 451
 452         if (kind < 0) { /* must identify */
 453                 u8 man_id, chip_id, reg_config1, reg_config2;
 454                 u8 reg_alert_status, reg_alert_mask;
 455
 456                 man_id = i2c_smbus_read_byte_data(new_client,
 457                          LM63_REG_MAN_ID);
 458                 chip_id = i2c_smbus_read_byte_data(new_client,
 459                           LM63_REG_CHIP_ID);
 460                 reg_config1 = i2c_smbus_read_byte_data(new_client,
 461                               LM63_REG_CONFIG1);
 462                 reg_config2 = i2c_smbus_read_byte_data(new_client,
 463                               LM63_REG_CONFIG2);
 464                 reg_alert_status = i2c_smbus_read_byte_data(new_client,
 465                                    LM63_REG_ALERT_STATUS);
 466                 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 467                                  LM63_REG_ALERT_MASK);
 468
 469                 if (man_id == 0x01 /* National Semiconductor */
 470                  && chip_id == 0x41 /* LM63 */
 471                  && (reg_config1 & 0x18) == 0x00
 472                  && (reg_config2 & 0xF8) == 0x00
 473                  && (reg_alert_status & 0x20) == 0x00
 474                  && (reg_alert_mask & 0xA4) == 0xA4) {
 475                         kind = lm63;
 476                 } else { /* failed */
 477                         dev_dbg(&adapter->dev, "Unsupported chip "
 478                                 "(man_id=0x%02X, chip_id=0x%02X).\n",
 479                                 man_id, chip_id);
 480                         goto exit_free;
 481                 }
 482         }
 483
 484         strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
 485         data->valid = 0;
 486         mutex_init(&data->update_lock);
 487
 488         /* Tell the I2C layer a new client has arrived */
 489         if ((err = i2c_attach_client(new_client)))
 490                 goto exit_free;
 491
 492         /* Initialize the LM63 chip */
 493         lm63_init_client(new_client);
 494
 495         /* Register sysfs hooks */
 496         if ((err = sysfs_create_group(&new_client->dev.kobj,
 497                                       &lm63_group)))
 498                 goto exit_detach;
 499         if (data->config & 0x04) { /* tachometer enabled */
 500                 if ((err = sysfs_create_group(&new_client->dev.kobj,
 501                                               &lm63_group_fan1)))
 502                         goto exit_remove_files;
 503         }
 504
 505         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 506         if (IS_ERR(data->hwmon_dev)) {
 507                 err = PTR_ERR(data->hwmon_dev);
 508                 goto exit_remove_files;
 509         }
 510
 511         return 0;
 512
 513 exit_remove_files:
 514         sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
 515         sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
 516 exit_detach:
 517         i2c_detach_client(new_client);
 518 exit_free:
 519         kfree(data);
 520 exit:
 521         return err;
 522 }
 523
 524 /* Idealy we shouldn't have to initialize anything, since the BIOS
 525    should have taken care of everything */
 526 static void lm63_init_client(struct i2c_client *client)
 527 {
 528         struct lm63_data *data = i2c_get_clientdata(client);
 529
 530         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 531         data->config_fan = i2c_smbus_read_byte_data(client,
 532                                                     LM63_REG_CONFIG_FAN);
 533
 534         /* Start converting if needed */
 535         if (data->config & 0x40) { /* standby */
 536                 dev_dbg(&client->dev, "Switching to operational mode\n");
 537                 data->config &= 0xA7;
 538                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 539                                           data->config);
 540         }
 541
 542         /* We may need pwm1_freq before ever updating the client data */
 543         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 544         if (data->pwm1_freq == 0)
 545                 data->pwm1_freq = 1;
 546
 547         /* Show some debug info about the LM63 configuration */
 548         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 549                 (data->config & 0x04) ? "tachometer input" :
 550                 "alert output");
 551         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 552                 (data->config_fan & 0x08) ? "1.4" : "360",
 553                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 554         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 555                 (data->config_fan & 0x10) ? "low" : "high",
 556                 (data->config_fan & 0x20) ? "manual" : "auto");
 557 }
 558
 559 static int lm63_detach_client(struct i2c_client *client)
 560 {
 561         struct lm63_data *data = i2c_get_clientdata(client);
 562         int err;
 563
 564         hwmon_device_unregister(data->hwmon_dev);
 565         sysfs_remove_group(&client->dev.kobj, &lm63_group);
 566         sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
 567
 568         if ((err = i2c_detach_client(client)))
 569                 return err;
 570
 571         kfree(data);
 572         return 0;
 573 }
 574
 575 static struct lm63_data *lm63_update_device(struct device *dev)
 576 {
 577         struct i2c_client *client = to_i2c_client(dev);
 578         struct lm63_data *data = i2c_get_clientdata(client);
 579
 580         mutex_lock(&data->update_lock);
 581
 582         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 583                 if (data->config & 0x04) { /* tachometer enabled  */
 584                         /* order matters for fan1_input */
 585                         data->fan[0] = i2c_smbus_read_byte_data(client,
 586                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 587                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 588                                         LM63_REG_TACH_COUNT_MSB) << 8;
 589                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 590                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 591                                      | (i2c_smbus_read_byte_data(client,
 592                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 593                 }
 594
 595                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 596                                   LM63_REG_PWM_FREQ);
 597                 if (data->pwm1_freq == 0)
 598                         data->pwm1_freq = 1;
 599                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 600                                    LM63_REG_PWM_VALUE);
 601
 602                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 603                                  LM63_REG_LOCAL_TEMP);
 604                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 605                                  LM63_REG_LOCAL_HIGH);
 606
 607                 /* order matters for temp2_input */
 608                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 609                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 610                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 611                                    LM63_REG_REMOTE_TEMP_LSB);
 612                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 613                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 614                                 | i2c_smbus_read_byte_data(client,
 615                                   LM63_REG_REMOTE_LOW_LSB);
 616                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 617                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 618                                 | i2c_smbus_read_byte_data(client,
 619                                   LM63_REG_REMOTE_HIGH_LSB);
 620                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 621                                  LM63_REG_REMOTE_TCRIT);
 622                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 623                                         LM63_REG_REMOTE_TCRIT_HYST);
 624
 625                 data->alarms = i2c_smbus_read_byte_data(client,
 626                                LM63_REG_ALERT_STATUS) & 0x7F;
 627
 628                 data->last_updated = jiffies;
 629                 data->valid = 1;
 630         }
 631
 632         mutex_unlock(&data->update_lock);
 633
 634         return data;
 635 }
 636
 637 static int __init sensors_lm63_init(void)
 638 {
 639         return i2c_add_driver(&lm63_driver);
 640 }
 641
 642 static void __exit sensors_lm63_exit(void)
 643 {
 644         i2c_del_driver(&lm63_driver);
 645 }
 646
 647 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 648 MODULE_DESCRIPTION("LM63 driver");
 649 MODULE_LICENSE("GPL");
 650
 651 module_init(sensors_lm63_init);
 652 module_exit(sensors_lm63_exit);