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