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[] = { 0x18, 0x4c, 0x4e, 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  * For LM64 the actual remote diode temperature is 16 degree Celsius higher
 102  * than the register reading. Remote temperature setpoints have to be
 103  * adapted accordingly.
 104  */
 105
 106 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 107                                  5400000 / (reg))
 108 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 109                                  (5400000 / (val)) & 0xFFFC)
 110 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 111 #define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 112                                  (val) >= 127000 ? 127 : \
 113                                  (val) < 0 ? ((val) - 500) / 1000 : \
 114                                  ((val) + 500) / 1000)
 115 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 116 #define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 117                                  (val) >= 127875 ? 0x7FE0 : \
 118                                  (val) < 0 ? ((val) - 62) / 125 * 32 : \
 119                                  ((val) + 62) / 125 * 32)
 120 #define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 121                                  (val) >= 127000 ? 127 : \
 122                                  ((val) + 500) / 1000)
 123
 124 /*
 125  * Functions declaration
 126  */
 127
 128 static int lm63_probe(struct i2c_client *client,
 129                       const struct i2c_device_id *id);
 130 static int lm63_remove(struct i2c_client *client);
 131
 132 static struct lm63_data *lm63_update_device(struct device *dev);
 133
 134 static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
 135 static void lm63_init_client(struct i2c_client *client);
 136
 137 enum chips { lm63, lm64 };
 138
 139 /*
 140  * Driver data (common to all clients)
 141  */
 142
 143 static const struct i2c_device_id lm63_id[] = {
 144         { "lm63", lm63 },
 145         { "lm64", lm64 },
 146         { }
 147 };
 148 MODULE_DEVICE_TABLE(i2c, lm63_id);
 149
 150 static struct i2c_driver lm63_driver = {
 151         .class          = I2C_CLASS_HWMON,
 152         .driver = {
 153                 .name   = "lm63",
 154         },
 155         .probe          = lm63_probe,
 156         .remove         = lm63_remove,
 157         .id_table       = lm63_id,
 158         .detect         = lm63_detect,
 159         .address_list   = normal_i2c,
 160 };
 161
 162 /*
 163  * Client data (each client gets its own)
 164  */
 165
 166 struct lm63_data {
 167         struct device *hwmon_dev;
 168         struct mutex update_lock;
 169         char valid; /* zero until following fields are valid */
 170         unsigned long last_updated; /* in jiffies */
 171         int kind;
 172         int temp2_offset;
 173
 174         /* registers values */
 175         u8 config, config_fan;
 176         u16 fan[2];     /* 0: input
 177                            1: low limit */
 178         u8 pwm1_freq;
 179         u8 pwm1_value;
 180         s8 temp8[3];    /* 0: local input
 181                            1: local high limit
 182                            2: remote critical limit */
 183         s16 temp11[4];  /* 0: remote input
 184                            1: remote low limit
 185                            2: remote high limit
 186                            3: remote offset */
 187         u8 temp2_crit_hyst;
 188         u8 alarms;
 189 };
 190
 191 /*
 192  * Sysfs callback functions and files
 193  */
 194
 195 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 196                         char *buf)
 197 {
 198         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 199         struct lm63_data *data = lm63_update_device(dev);
 200         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 201 }
 202
 203 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 204                        const char *buf, size_t count)
 205 {
 206         struct i2c_client *client = to_i2c_client(dev);
 207         struct lm63_data *data = i2c_get_clientdata(client);
 208         unsigned long val;
 209         int err;
 210
 211         err = kstrtoul(buf, 10, &val);
 212         if (err)
 213                 return err;
 214
 215         mutex_lock(&data->update_lock);
 216         data->fan[1] = FAN_TO_REG(val);
 217         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 218                                   data->fan[1] & 0xFF);
 219         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 220                                   data->fan[1] >> 8);
 221         mutex_unlock(&data->update_lock);
 222         return count;
 223 }
 224
 225 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 226                          char *buf)
 227 {
 228         struct lm63_data *data = lm63_update_device(dev);
 229         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 230                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 231                        (2 * data->pwm1_freq));
 232 }
 233
 234 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 235                         const char *buf, size_t count)
 236 {
 237         struct i2c_client *client = to_i2c_client(dev);
 238         struct lm63_data *data = i2c_get_clientdata(client);
 239         unsigned long val;
 240         int err;
 241
 242         if (!(data->config_fan & 0x20)) /* register is read-only */
 243                 return -EPERM;
 244
 245         err = kstrtoul(buf, 10, &val);
 246         if (err)
 247                 return err;
 248
 249         mutex_lock(&data->update_lock);
 250         data->pwm1_value = val <= 0 ? 0 :
 251                            val >= 255 ? 2 * data->pwm1_freq :
 252                            (val * data->pwm1_freq * 2 + 127) / 255;
 253         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 254         mutex_unlock(&data->update_lock);
 255         return count;
 256 }
 257
 258 static ssize_t show_pwm1_enable(struct device *dev,
 259                                 struct device_attribute *dummy, char *buf)
 260 {
 261         struct lm63_data *data = lm63_update_device(dev);
 262         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 263 }
 264
 265 /*
 266  * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
 267  * For remote sensor registers temp2_offset has to be considered,
 268  * for local sensor it must not.
 269  * So we need separate 8bit accessors for local and remote sensor.
 270  */
 271 static ssize_t show_local_temp8(struct device *dev,
 272                                 struct device_attribute *devattr,
 273                                 char *buf)
 274 {
 275         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 276         struct lm63_data *data = lm63_update_device(dev);
 277         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 278 }
 279
 280 static ssize_t show_remote_temp8(struct device *dev,
 281                                  struct device_attribute *devattr,
 282                                  char *buf)
 283 {
 284         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 285         struct lm63_data *data = lm63_update_device(dev);
 286         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])
 287                        + data->temp2_offset);
 288 }
 289
 290 static ssize_t set_local_temp8(struct device *dev,
 291                                struct device_attribute *dummy,
 292                                const char *buf, size_t count)
 293 {
 294         struct i2c_client *client = to_i2c_client(dev);
 295         struct lm63_data *data = i2c_get_clientdata(client);
 296         long val;
 297         int err;
 298
 299         err = kstrtol(buf, 10, &val);
 300         if (err)
 301                 return err;
 302
 303         mutex_lock(&data->update_lock);
 304         data->temp8[1] = TEMP8_TO_REG(val);
 305         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 306         mutex_unlock(&data->update_lock);
 307         return count;
 308 }
 309
 310 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 311                            char *buf)
 312 {
 313         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 314         struct lm63_data *data = lm63_update_device(dev);
 315         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])
 316                        + data->temp2_offset);
 317 }
 318
 319 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 320                           const char *buf, size_t count)
 321 {
 322         static const u8 reg[6] = {
 323                 LM63_REG_REMOTE_LOW_MSB,
 324                 LM63_REG_REMOTE_LOW_LSB,
 325                 LM63_REG_REMOTE_HIGH_MSB,
 326                 LM63_REG_REMOTE_HIGH_LSB,
 327                 LM63_REG_REMOTE_OFFSET_MSB,
 328                 LM63_REG_REMOTE_OFFSET_LSB,
 329         };
 330
 331         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 332         struct i2c_client *client = to_i2c_client(dev);
 333         struct lm63_data *data = i2c_get_clientdata(client);
 334         long val;
 335         int err;
 336         int nr = attr->index;
 337
 338         err = kstrtol(buf, 10, &val);
 339         if (err)
 340                 return err;
 341
 342         mutex_lock(&data->update_lock);
 343         data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
 344         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 345                                   data->temp11[nr] >> 8);
 346         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 347                                   data->temp11[nr] & 0xff);
 348         mutex_unlock(&data->update_lock);
 349         return count;
 350 }
 351
 352 /*
 353  * Hysteresis register holds a relative value, while we want to present
 354  * an absolute to user-space
 355  */
 356 static ssize_t show_temp2_crit_hyst(struct device *dev,
 357                                     struct device_attribute *dummy, char *buf)
 358 {
 359         struct lm63_data *data = lm63_update_device(dev);
 360         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 361                        + data->temp2_offset
 362                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 363 }
 364
 365 /*
 366  * And now the other way around, user-space provides an absolute
 367  * hysteresis value and we have to store a relative one
 368  */
 369 static ssize_t set_temp2_crit_hyst(struct device *dev,
 370                                    struct device_attribute *dummy,
 371                                    const char *buf, size_t count)
 372 {
 373         struct i2c_client *client = to_i2c_client(dev);
 374         struct lm63_data *data = i2c_get_clientdata(client);
 375         long val;
 376         int err;
 377         long hyst;
 378
 379         err = kstrtol(buf, 10, &val);
 380         if (err)
 381                 return err;
 382
 383         mutex_lock(&data->update_lock);
 384         hyst = TEMP8_FROM_REG(data->temp8[2]) + data->temp2_offset - val;
 385         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 386                                   HYST_TO_REG(hyst));
 387         mutex_unlock(&data->update_lock);
 388         return count;
 389 }
 390
 391 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 392                            char *buf)
 393 {
 394         struct lm63_data *data = lm63_update_device(dev);
 395         return sprintf(buf, "%u\n", data->alarms);
 396 }
 397
 398 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 399                           char *buf)
 400 {
 401         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 402         struct lm63_data *data = lm63_update_device(dev);
 403         int bitnr = attr->index;
 404
 405         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 406 }
 407
 408 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 409 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 410         set_fan, 1);
 411
 412 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 413 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 414
 415 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
 416 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
 417         set_local_temp8, 1);
 418
 419 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 420 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 421         set_temp11, 1);
 422 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 423         set_temp11, 2);
 424 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
 425         set_temp11, 3);
 426 /*
 427  * On LM63, temp2_crit can be set only once, which should be job
 428  * of the bootloader.
 429  */
 430 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
 431         NULL, 2);
 432 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 433         set_temp2_crit_hyst);
 434
 435 /* Individual alarm files */
 436 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 437 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 438 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 439 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 440 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 441 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 442 /* Raw alarm file for compatibility */
 443 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 444
 445 static struct attribute *lm63_attributes[] = {
 446         &dev_attr_pwm1.attr,
 447         &dev_attr_pwm1_enable.attr,
 448         &sensor_dev_attr_temp1_input.dev_attr.attr,
 449         &sensor_dev_attr_temp2_input.dev_attr.attr,
 450         &sensor_dev_attr_temp2_min.dev_attr.attr,
 451         &sensor_dev_attr_temp1_max.dev_attr.attr,
 452         &sensor_dev_attr_temp2_max.dev_attr.attr,
 453         &sensor_dev_attr_temp2_offset.dev_attr.attr,
 454         &sensor_dev_attr_temp2_crit.dev_attr.attr,
 455         &dev_attr_temp2_crit_hyst.attr,
 456
 457         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 458         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 459         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 460         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 461         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 462         &dev_attr_alarms.attr,
 463         NULL
 464 };
 465
 466 static const struct attribute_group lm63_group = {
 467         .attrs = lm63_attributes,
 468 };
 469
 470 static struct attribute *lm63_attributes_fan1[] = {
 471         &sensor_dev_attr_fan1_input.dev_attr.attr,
 472         &sensor_dev_attr_fan1_min.dev_attr.attr,
 473
 474         &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 475         NULL
 476 };
 477
 478 static const struct attribute_group lm63_group_fan1 = {
 479         .attrs = lm63_attributes_fan1,
 480 };
 481
 482 /*
 483  * Real code
 484  */
 485
 486 /* Return 0 if detection is successful, -ENODEV otherwise */
 487 static int lm63_detect(struct i2c_client *new_client,
 488                        struct i2c_board_info *info)
 489 {
 490         struct i2c_adapter *adapter = new_client->adapter;
 491         u8 man_id, chip_id, reg_config1, reg_config2;
 492         u8 reg_alert_status, reg_alert_mask;
 493         int address = new_client->addr;
 494
 495         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 496                 return -ENODEV;
 497
 498         man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
 499         chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
 500
 501         reg_config1 = i2c_smbus_read_byte_data(new_client,
 502                       LM63_REG_CONFIG1);
 503         reg_config2 = i2c_smbus_read_byte_data(new_client,
 504                       LM63_REG_CONFIG2);
 505         reg_alert_status = i2c_smbus_read_byte_data(new_client,
 506                            LM63_REG_ALERT_STATUS);
 507         reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 508                          LM63_REG_ALERT_MASK);
 509
 510         if (man_id != 0x01 /* National Semiconductor */
 511          || (reg_config1 & 0x18) != 0x00
 512          || (reg_config2 & 0xF8) != 0x00
 513          || (reg_alert_status & 0x20) != 0x00
 514          || (reg_alert_mask & 0xA4) != 0xA4) {
 515                 dev_dbg(&adapter->dev,
 516                         "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
 517                         man_id, chip_id);
 518                 return -ENODEV;
 519         }
 520
 521         if (chip_id == 0x41 && address == 0x4c)
 522                 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
 523         else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
 524                 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
 525         else
 526                 return -ENODEV;
 527
 528         return 0;
 529 }
 530
 531 static int lm63_probe(struct i2c_client *new_client,
 532                       const struct i2c_device_id *id)
 533 {
 534         struct lm63_data *data;
 535         int err;
 536
 537         data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
 538         if (!data) {
 539                 err = -ENOMEM;
 540                 goto exit;
 541         }
 542
 543         i2c_set_clientdata(new_client, data);
 544         data->valid = 0;
 545         mutex_init(&data->update_lock);
 546
 547         /* Set the device type */
 548         data->kind = id->driver_data;
 549         if (data->kind == lm64)
 550                 data->temp2_offset = 16000;
 551
 552         /* Initialize chip */
 553         lm63_init_client(new_client);
 554
 555         /* Register sysfs hooks */
 556         err = sysfs_create_group(&new_client->dev.kobj, &lm63_group);
 557         if (err)
 558                 goto exit_free;
 559         if (data->config & 0x04) { /* tachometer enabled */
 560                 err = sysfs_create_group(&new_client->dev.kobj,
 561                                          &lm63_group_fan1);
 562                 if (err)
 563                         goto exit_remove_files;
 564         }
 565
 566         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 567         if (IS_ERR(data->hwmon_dev)) {
 568                 err = PTR_ERR(data->hwmon_dev);
 569                 goto exit_remove_files;
 570         }
 571
 572         return 0;
 573
 574 exit_remove_files:
 575         sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
 576         sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
 577 exit_free:
 578         kfree(data);
 579 exit:
 580         return err;
 581 }
 582
 583 /*
 584  * Ideally we shouldn't have to initialize anything, since the BIOS
 585  * should have taken care of everything
 586  */
 587 static void lm63_init_client(struct i2c_client *client)
 588 {
 589         struct lm63_data *data = i2c_get_clientdata(client);
 590
 591         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 592         data->config_fan = i2c_smbus_read_byte_data(client,
 593                                                     LM63_REG_CONFIG_FAN);
 594
 595         /* Start converting if needed */
 596         if (data->config & 0x40) { /* standby */
 597                 dev_dbg(&client->dev, "Switching to operational mode\n");
 598                 data->config &= 0xA7;
 599                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 600                                           data->config);
 601         }
 602
 603         /* We may need pwm1_freq before ever updating the client data */
 604         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 605         if (data->pwm1_freq == 0)
 606                 data->pwm1_freq = 1;
 607
 608         /* Show some debug info about the LM63 configuration */
 609         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 610                 (data->config & 0x04) ? "tachometer input" :
 611                 "alert output");
 612         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 613                 (data->config_fan & 0x08) ? "1.4" : "360",
 614                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 615         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 616                 (data->config_fan & 0x10) ? "low" : "high",
 617                 (data->config_fan & 0x20) ? "manual" : "auto");
 618 }
 619
 620 static int lm63_remove(struct i2c_client *client)
 621 {
 622         struct lm63_data *data = i2c_get_clientdata(client);
 623
 624         hwmon_device_unregister(data->hwmon_dev);
 625         sysfs_remove_group(&client->dev.kobj, &lm63_group);
 626         sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
 627
 628         kfree(data);
 629         return 0;
 630 }
 631
 632 static struct lm63_data *lm63_update_device(struct device *dev)
 633 {
 634         struct i2c_client *client = to_i2c_client(dev);
 635         struct lm63_data *data = i2c_get_clientdata(client);
 636
 637         mutex_lock(&data->update_lock);
 638
 639         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 640                 if (data->config & 0x04) { /* tachometer enabled  */
 641                         /* order matters for fan1_input */
 642                         data->fan[0] = i2c_smbus_read_byte_data(client,
 643                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 644                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 645                                         LM63_REG_TACH_COUNT_MSB) << 8;
 646                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 647                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 648                                      | (i2c_smbus_read_byte_data(client,
 649                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 650                 }
 651
 652                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 653                                   LM63_REG_PWM_FREQ);
 654                 if (data->pwm1_freq == 0)
 655                         data->pwm1_freq = 1;
 656                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 657                                    LM63_REG_PWM_VALUE);
 658
 659                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 660                                  LM63_REG_LOCAL_TEMP);
 661                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 662                                  LM63_REG_LOCAL_HIGH);
 663
 664                 /* order matters for temp2_input */
 665                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 666                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 667                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 668                                    LM63_REG_REMOTE_TEMP_LSB);
 669                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 670                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 671                                 | i2c_smbus_read_byte_data(client,
 672                                   LM63_REG_REMOTE_LOW_LSB);
 673                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 674                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 675                                 | i2c_smbus_read_byte_data(client,
 676                                   LM63_REG_REMOTE_HIGH_LSB);
 677                 data->temp11[3] = (i2c_smbus_read_byte_data(client,
 678                                   LM63_REG_REMOTE_OFFSET_MSB) << 8)
 679                                 | i2c_smbus_read_byte_data(client,
 680                                   LM63_REG_REMOTE_OFFSET_LSB);
 681                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 682                                  LM63_REG_REMOTE_TCRIT);
 683                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 684                                         LM63_REG_REMOTE_TCRIT_HYST);
 685
 686                 data->alarms = i2c_smbus_read_byte_data(client,
 687                                LM63_REG_ALERT_STATUS) & 0x7F;
 688
 689                 data->last_updated = jiffies;
 690                 data->valid = 1;
 691         }
 692
 693         mutex_unlock(&data->update_lock);
 694
 695         return data;
 696 }
 697
 698 static int __init sensors_lm63_init(void)
 699 {
 700         return i2c_add_driver(&lm63_driver);
 701 }
 702
 703 static void __exit sensors_lm63_exit(void)
 704 {
 705         i2c_del_driver(&lm63_driver);
 706 }
 707
 708 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 709 MODULE_DESCRIPTION("LM63 driver");
 710 MODULE_LICENSE("GPL");
 711
 712 module_init(sensors_lm63_init);
 713 module_exit(sensors_lm63_exit);