drivers/hwmon/lm63.c

   1 /*
   2  * lm63.c - driver for the National Semiconductor LM63 temperature sensor
   3  *          with integrated fan control
   4  * Copyright (C) 2004-2005  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/i2c-sensor.h>
  46 #include <linux/hwmon-sysfs.h>
  47 #include <linux/hwmon.h>
  48 #include <linux/err.h>
  49
  50 /*
  51  * Addresses to scan
  52  * Address is fully defined internally and cannot be changed.
  53  */
  54
  55 static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
  56
  57 /*
  58  * Insmod parameters
  59  */
  60
  61 SENSORS_INSMOD_1(lm63);
  62
  63 /*
  64  * The LM63 registers
  65  */
  66
  67 #define LM63_REG_CONFIG1                0x03
  68 #define LM63_REG_CONFIG2                0xBF
  69 #define LM63_REG_CONFIG_FAN             0x4A
  70
  71 #define LM63_REG_TACH_COUNT_MSB         0x47
  72 #define LM63_REG_TACH_COUNT_LSB         0x46
  73 #define LM63_REG_TACH_LIMIT_MSB         0x49
  74 #define LM63_REG_TACH_LIMIT_LSB         0x48
  75
  76 #define LM63_REG_PWM_VALUE              0x4C
  77 #define LM63_REG_PWM_FREQ               0x4D
  78
  79 #define LM63_REG_LOCAL_TEMP             0x00
  80 #define LM63_REG_LOCAL_HIGH             0x05
  81
  82 #define LM63_REG_REMOTE_TEMP_MSB        0x01
  83 #define LM63_REG_REMOTE_TEMP_LSB        0x10
  84 #define LM63_REG_REMOTE_OFFSET_MSB      0x11
  85 #define LM63_REG_REMOTE_OFFSET_LSB      0x12
  86 #define LM63_REG_REMOTE_HIGH_MSB        0x07
  87 #define LM63_REG_REMOTE_HIGH_LSB        0x13
  88 #define LM63_REG_REMOTE_LOW_MSB         0x08
  89 #define LM63_REG_REMOTE_LOW_LSB         0x14
  90 #define LM63_REG_REMOTE_TCRIT           0x19
  91 #define LM63_REG_REMOTE_TCRIT_HYST      0x21
  92
  93 #define LM63_REG_ALERT_STATUS           0x02
  94 #define LM63_REG_ALERT_MASK             0x16
  95
  96 #define LM63_REG_MAN_ID                 0xFE
  97 #define LM63_REG_CHIP_ID                0xFF
  98
  99 /*
 100  * Conversions and various macros
 101  * For tachometer counts, the LM63 uses 16-bit values.
 102  * For local temperature and high limit, remote critical limit and hysteresis
 103  * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
 104  * For remote temperature, low and high limits, it uses signed 11-bit values
 105  * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 106  */
 107
 108 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 109                                  5400000 / (reg))
 110 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 111                                  (5400000 / (val)) & 0xFFFC)
 112 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 113 #define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 114                                  (val) >= 127000 ? 127 : \
 115                                  (val) < 0 ? ((val) - 500) / 1000 : \
 116                                  ((val) + 500) / 1000)
 117 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 118 #define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 119                                  (val) >= 127875 ? 0x7FE0 : \
 120                                  (val) < 0 ? ((val) - 62) / 125 * 32 : \
 121                                  ((val) + 62) / 125 * 32)
 122 #define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 123                                  (val) >= 127000 ? 127 : \
 124                                  ((val) + 500) / 1000)
 125
 126 /*
 127  * Functions declaration
 128  */
 129
 130 static int lm63_attach_adapter(struct i2c_adapter *adapter);
 131 static int lm63_detach_client(struct i2c_client *client);
 132
 133 static struct lm63_data *lm63_update_device(struct device *dev);
 134
 135 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
 136 static void lm63_init_client(struct i2c_client *client);
 137
 138 /*
 139  * Driver data (common to all clients)
 140  */
 141
 142 static struct i2c_driver lm63_driver = {
 143         .owner          = THIS_MODULE,
 144         .name           = "lm63",
 145         .flags          = I2C_DF_NOTIFY,
 146         .attach_adapter = lm63_attach_adapter,
 147         .detach_client  = lm63_detach_client,
 148 };
 149
 150 /*
 151  * Client data (each client gets its own)
 152  */
 153
 154 struct lm63_data {
 155         struct i2c_client client;
 156         struct class_device *class_dev;
 157         struct semaphore update_lock;
 158         char valid; /* zero until following fields are valid */
 159         unsigned long last_updated; /* in jiffies */
 160
 161         /* registers values */
 162         u8 config, config_fan;
 163         u16 fan[2];     /* 0: input
 164                            1: low limit */
 165         u8 pwm1_freq;
 166         u8 pwm1_value;
 167         s8 temp8[3];    /* 0: local input
 168                            1: local high limit
 169                            2: remote critical limit */
 170         s16 temp11[3];  /* 0: remote input
 171                            1: remote low limit
 172                            2: remote high limit */
 173         u8 temp2_crit_hyst;
 174         u8 alarms;
 175 };
 176
 177 /*
 178  * Sysfs callback functions and files
 179  */
 180
 181 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 182                         char *buf)
 183 {
 184         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 185         struct lm63_data *data = lm63_update_device(dev);
 186         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 187 }
 188
 189 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 190                        const char *buf, size_t count)
 191 {
 192         struct i2c_client *client = to_i2c_client(dev);
 193         struct lm63_data *data = i2c_get_clientdata(client);
 194         unsigned long val = simple_strtoul(buf, NULL, 10);
 195
 196         down(&data->update_lock);
 197         data->fan[1] = FAN_TO_REG(val);
 198         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 199                                   data->fan[1] & 0xFF);
 200         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 201                                   data->fan[1] >> 8);
 202         up(&data->update_lock);
 203         return count;
 204 }
 205
 206 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 207                          char *buf)
 208 {
 209         struct lm63_data *data = lm63_update_device(dev);
 210         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 211                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 212                        (2 * data->pwm1_freq));
 213 }
 214
 215 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 216                         const char *buf, size_t count)
 217 {
 218         struct i2c_client *client = to_i2c_client(dev);
 219         struct lm63_data *data = i2c_get_clientdata(client);
 220         unsigned long val;
 221
 222         if (!(data->config_fan & 0x20)) /* register is read-only */
 223                 return -EPERM;
 224
 225         val = simple_strtoul(buf, NULL, 10);
 226         down(&data->update_lock);
 227         data->pwm1_value = val <= 0 ? 0 :
 228                            val >= 255 ? 2 * data->pwm1_freq :
 229                            (val * data->pwm1_freq * 2 + 127) / 255;
 230         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 231         up(&data->update_lock);
 232         return count;
 233 }
 234
 235 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
 236                                 char *buf)
 237 {
 238         struct lm63_data *data = lm63_update_device(dev);
 239         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 240 }
 241
 242 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
 243                           char *buf)
 244 {
 245         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 246         struct lm63_data *data = lm63_update_device(dev);
 247         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 248 }
 249
 250 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
 251                          const char *buf, size_t count)
 252 {
 253         struct i2c_client *client = to_i2c_client(dev);
 254         struct lm63_data *data = i2c_get_clientdata(client);
 255         long val = simple_strtol(buf, NULL, 10);
 256
 257         down(&data->update_lock);
 258         data->temp8[1] = TEMP8_TO_REG(val);
 259         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 260         up(&data->update_lock);
 261         return count;
 262 }
 263
 264 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
 265                            char *buf)
 266 {
 267         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 268         struct lm63_data *data = lm63_update_device(dev);
 269         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
 270 }
 271
 272 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 273                           const char *buf, size_t count)
 274 {
 275         static const u8 reg[4] = {
 276                 LM63_REG_REMOTE_LOW_MSB,
 277                 LM63_REG_REMOTE_LOW_LSB,
 278                 LM63_REG_REMOTE_HIGH_MSB,
 279                 LM63_REG_REMOTE_HIGH_LSB,
 280         };
 281
 282         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 283         struct i2c_client *client = to_i2c_client(dev);
 284         struct lm63_data *data = i2c_get_clientdata(client);
 285         long val = simple_strtol(buf, NULL, 10);
 286         int nr = attr->index;
 287
 288         down(&data->update_lock);
 289         data->temp11[nr] = TEMP11_TO_REG(val);
 290         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 291                                   data->temp11[nr] >> 8);
 292         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 293                                   data->temp11[nr] & 0xff);
 294         up(&data->update_lock);
 295         return count;
 296 }
 297
 298 /* Hysteresis register holds a relative value, while we want to present
 299    an absolute to user-space */
 300 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 301                                     char *buf)
 302 {
 303         struct lm63_data *data = lm63_update_device(dev);
 304         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 305                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 306 }
 307
 308 /* And now the other way around, user-space provides an absolute
 309    hysteresis value and we have to store a relative one */
 310 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 311                                    const char *buf, size_t count)
 312 {
 313         struct i2c_client *client = to_i2c_client(dev);
 314         struct lm63_data *data = i2c_get_clientdata(client);
 315         long val = simple_strtol(buf, NULL, 10);
 316         long hyst;
 317
 318         down(&data->update_lock);
 319         hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
 320         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 321                                   HYST_TO_REG(hyst));
 322         up(&data->update_lock);
 323         return count;
 324 }
 325
 326 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 327                            char *buf)
 328 {
 329         struct lm63_data *data = lm63_update_device(dev);
 330         return sprintf(buf, "%u\n", data->alarms);
 331 }
 332
 333 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 334 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 335         set_fan, 1);
 336
 337 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 338 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 339
 340 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
 341 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
 342         set_temp8, 1);
 343
 344 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 345 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 346         set_temp11, 1);
 347 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 348         set_temp11, 2);
 349 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
 350 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 351         set_temp2_crit_hyst);
 352
 353 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 354
 355 /*
 356  * Real code
 357  */
 358
 359 static int lm63_attach_adapter(struct i2c_adapter *adapter)
 360 {
 361         if (!(adapter->class & I2C_CLASS_HWMON))
 362                 return 0;
 363         return i2c_detect(adapter, &addr_data, lm63_detect);
 364 }
 365
 366 /*
 367  * The following function does more than just detection. If detection
 368  * succeeds, it also registers the new chip.
 369  */
 370 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
 371 {
 372         struct i2c_client *new_client;
 373         struct lm63_data *data;
 374         int err = 0;
 375
 376         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 377                 goto exit;
 378
 379         if (!(data = kmalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
 380                 err = -ENOMEM;
 381                 goto exit;
 382         }
 383         memset(data, 0, sizeof(struct lm63_data));
 384
 385         /* The common I2C client data is placed right before the
 386            LM63-specific data. */
 387         new_client = &data->client;
 388         i2c_set_clientdata(new_client, data);
 389         new_client->addr = address;
 390         new_client->adapter = adapter;
 391         new_client->driver = &lm63_driver;
 392         new_client->flags = 0;
 393
 394         /* Default to an LM63 if forced */
 395         if (kind == 0)
 396                 kind = lm63;
 397
 398         if (kind < 0) { /* must identify */
 399                 u8 man_id, chip_id, reg_config1, reg_config2;
 400                 u8 reg_alert_status, reg_alert_mask;
 401
 402                 man_id = i2c_smbus_read_byte_data(new_client,
 403                          LM63_REG_MAN_ID);
 404                 chip_id = i2c_smbus_read_byte_data(new_client,
 405                           LM63_REG_CHIP_ID);
 406                 reg_config1 = i2c_smbus_read_byte_data(new_client,
 407                               LM63_REG_CONFIG1);
 408                 reg_config2 = i2c_smbus_read_byte_data(new_client,
 409                               LM63_REG_CONFIG2);
 410                 reg_alert_status = i2c_smbus_read_byte_data(new_client,
 411                                    LM63_REG_ALERT_STATUS);
 412                 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 413                                  LM63_REG_ALERT_MASK);
 414
 415                 if (man_id == 0x01 /* National Semiconductor */
 416                  && chip_id == 0x41 /* LM63 */
 417                  && (reg_config1 & 0x18) == 0x00
 418                  && (reg_config2 & 0xF8) == 0x00
 419                  && (reg_alert_status & 0x20) == 0x00
 420                  && (reg_alert_mask & 0xA4) == 0xA4) {
 421                         kind = lm63;
 422                 } else { /* failed */
 423                         dev_dbg(&adapter->dev, "Unsupported chip "
 424                                 "(man_id=0x%02X, chip_id=0x%02X).\n",
 425                                 man_id, chip_id);
 426                         goto exit_free;
 427                 }
 428         }
 429
 430         strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
 431         data->valid = 0;
 432         init_MUTEX(&data->update_lock);
 433
 434         /* Tell the I2C layer a new client has arrived */
 435         if ((err = i2c_attach_client(new_client)))
 436                 goto exit_free;
 437
 438         /* Initialize the LM63 chip */
 439         lm63_init_client(new_client);
 440
 441         /* Register sysfs hooks */
 442         data->class_dev = hwmon_device_register(&new_client->dev);
 443         if (IS_ERR(data->class_dev)) {
 444                 err = PTR_ERR(data->class_dev);
 445                 goto exit_detach;
 446         }
 447
 448         if (data->config & 0x04) { /* tachometer enabled */
 449                 device_create_file(&new_client->dev,
 450                                    &sensor_dev_attr_fan1_input.dev_attr);
 451                 device_create_file(&new_client->dev,
 452                                    &sensor_dev_attr_fan1_min.dev_attr);
 453         }
 454         device_create_file(&new_client->dev, &dev_attr_pwm1);
 455         device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
 456         device_create_file(&new_client->dev,
 457                            &sensor_dev_attr_temp1_input.dev_attr);
 458         device_create_file(&new_client->dev,
 459                            &sensor_dev_attr_temp2_input.dev_attr);
 460         device_create_file(&new_client->dev,
 461                            &sensor_dev_attr_temp2_min.dev_attr);
 462         device_create_file(&new_client->dev,
 463                            &sensor_dev_attr_temp1_max.dev_attr);
 464         device_create_file(&new_client->dev,
 465                            &sensor_dev_attr_temp2_max.dev_attr);
 466         device_create_file(&new_client->dev,
 467                            &sensor_dev_attr_temp2_crit.dev_attr);
 468         device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst);
 469         device_create_file(&new_client->dev, &dev_attr_alarms);
 470
 471         return 0;
 472
 473 exit_detach:
 474         i2c_detach_client(new_client);
 475 exit_free:
 476         kfree(data);
 477 exit:
 478         return err;
 479 }
 480
 481 /* Idealy we shouldn't have to initialize anything, since the BIOS
 482    should have taken care of everything */
 483 static void lm63_init_client(struct i2c_client *client)
 484 {
 485         struct lm63_data *data = i2c_get_clientdata(client);
 486
 487         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 488         data->config_fan = i2c_smbus_read_byte_data(client,
 489                                                     LM63_REG_CONFIG_FAN);
 490
 491         /* Start converting if needed */
 492         if (data->config & 0x40) { /* standby */
 493                 dev_dbg(&client->dev, "Switching to operational mode");
 494                 data->config &= 0xA7;
 495                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 496                                           data->config);
 497         }
 498
 499         /* We may need pwm1_freq before ever updating the client data */
 500         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 501         if (data->pwm1_freq == 0)
 502                 data->pwm1_freq = 1;
 503
 504         /* Show some debug info about the LM63 configuration */
 505         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 506                 (data->config & 0x04) ? "tachometer input" :
 507                 "alert output");
 508         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 509                 (data->config_fan & 0x08) ? "1.4" : "360",
 510                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 511         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 512                 (data->config_fan & 0x10) ? "low" : "high",
 513                 (data->config_fan & 0x20) ? "manual" : "auto");
 514 }
 515
 516 static int lm63_detach_client(struct i2c_client *client)
 517 {
 518         struct lm63_data *data = i2c_get_clientdata(client);
 519         int err;
 520
 521         hwmon_device_unregister(data->class_dev);
 522
 523         if ((err = i2c_detach_client(client)))
 524                 return err;
 525
 526         kfree(data);
 527         return 0;
 528 }
 529
 530 static struct lm63_data *lm63_update_device(struct device *dev)
 531 {
 532         struct i2c_client *client = to_i2c_client(dev);
 533         struct lm63_data *data = i2c_get_clientdata(client);
 534
 535         down(&data->update_lock);
 536
 537         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 538                 if (data->config & 0x04) { /* tachometer enabled  */
 539                         /* order matters for fan1_input */
 540                         data->fan[0] = i2c_smbus_read_byte_data(client,
 541                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 542                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 543                                         LM63_REG_TACH_COUNT_MSB) << 8;
 544                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 545                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 546                                      | (i2c_smbus_read_byte_data(client,
 547                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 548                 }
 549
 550                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 551                                   LM63_REG_PWM_FREQ);
 552                 if (data->pwm1_freq == 0)
 553                         data->pwm1_freq = 1;
 554                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 555                                    LM63_REG_PWM_VALUE);
 556
 557                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 558                                  LM63_REG_LOCAL_TEMP);
 559                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 560                                  LM63_REG_LOCAL_HIGH);
 561
 562                 /* order matters for temp2_input */
 563                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 564                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 565                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 566                                    LM63_REG_REMOTE_TEMP_LSB);
 567                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 568                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 569                                 | i2c_smbus_read_byte_data(client,
 570                                   LM63_REG_REMOTE_LOW_LSB);
 571                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 572                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 573                                 | i2c_smbus_read_byte_data(client,
 574                                   LM63_REG_REMOTE_HIGH_LSB);
 575                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 576                                  LM63_REG_REMOTE_TCRIT);
 577                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 578                                         LM63_REG_REMOTE_TCRIT_HYST);
 579
 580                 data->alarms = i2c_smbus_read_byte_data(client,
 581                                LM63_REG_ALERT_STATUS) & 0x7F;
 582
 583                 data->last_updated = jiffies;
 584                 data->valid = 1;
 585         }
 586
 587         up(&data->update_lock);
 588
 589         return data;
 590 }
 591
 592 static int __init sensors_lm63_init(void)
 593 {
 594         return i2c_add_driver(&lm63_driver);
 595 }
 596
 597 static void __exit sensors_lm63_exit(void)
 598 {
 599         i2c_del_driver(&lm63_driver);
 600 }
 601
 602 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 603 MODULE_DESCRIPTION("LM63 driver");
 604 MODULE_LICENSE("GPL");
 605
 606 module_init(sensors_lm63_init);
 607 module_exit(sensors_lm63_exit);