drivers/i2c/chips/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
  48 /*
  49  * Addresses to scan
  50  * Address is fully defined internally and cannot be changed.
  51  */
  52
  53 static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
  54 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
  55
  56 /*
  57  * Insmod parameters
  58  */
  59
  60 SENSORS_INSMOD_1(lm63);
  61
  62 /*
  63  * The LM63 registers
  64  */
  65
  66 #define LM63_REG_CONFIG1                0x03
  67 #define LM63_REG_CONFIG2                0xBF
  68 #define LM63_REG_CONFIG_FAN             0x4A
  69
  70 #define LM63_REG_TACH_COUNT_MSB         0x47
  71 #define LM63_REG_TACH_COUNT_LSB         0x46
  72 #define LM63_REG_TACH_LIMIT_MSB         0x49
  73 #define LM63_REG_TACH_LIMIT_LSB         0x48
  74
  75 #define LM63_REG_PWM_VALUE              0x4C
  76 #define LM63_REG_PWM_FREQ               0x4D
  77
  78 #define LM63_REG_LOCAL_TEMP             0x00
  79 #define LM63_REG_LOCAL_HIGH             0x05
  80
  81 #define LM63_REG_REMOTE_TEMP_MSB        0x01
  82 #define LM63_REG_REMOTE_TEMP_LSB        0x10
  83 #define LM63_REG_REMOTE_OFFSET_MSB      0x11
  84 #define LM63_REG_REMOTE_OFFSET_LSB      0x12
  85 #define LM63_REG_REMOTE_HIGH_MSB        0x07
  86 #define LM63_REG_REMOTE_HIGH_LSB        0x13
  87 #define LM63_REG_REMOTE_LOW_MSB         0x08
  88 #define LM63_REG_REMOTE_LOW_LSB         0x14
  89 #define LM63_REG_REMOTE_TCRIT           0x19
  90 #define LM63_REG_REMOTE_TCRIT_HYST      0x21
  91
  92 #define LM63_REG_ALERT_STATUS           0x02
  93 #define LM63_REG_ALERT_MASK             0x16
  94
  95 #define LM63_REG_MAN_ID                 0xFE
  96 #define LM63_REG_CHIP_ID                0xFF
  97
  98 /*
  99  * Conversions and various macros
 100  * For tachometer counts, the LM63 uses 16-bit values.
 101  * For local temperature and high limit, remote critical limit and hysteresis
 102  * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
 103  * For remote temperature, low and high limits, it uses signed 11-bit values
 104  * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
 105  */
 106
 107 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 108                                  5400000 / (reg))
 109 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 110                                  (5400000 / (val)) & 0xFFFC)
 111 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 112 #define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 113                                  (val) >= 127000 ? 127 : \
 114                                  (val) < 0 ? ((val) - 500) / 1000 : \
 115                                  ((val) + 500) / 1000)
 116 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 117 #define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 118                                  (val) >= 127875 ? 0x7FE0 : \
 119                                  (val) < 0 ? ((val) - 62) / 125 * 32 : \
 120                                  ((val) + 62) / 125 * 32)
 121 #define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 122                                  (val) >= 127000 ? 127 : \
 123                                  ((val) + 500) / 1000)
 124
 125 /*
 126  * Functions declaration
 127  */
 128
 129 static int lm63_attach_adapter(struct i2c_adapter *adapter);
 130 static int lm63_detach_client(struct i2c_client *client);
 131
 132 static struct lm63_data *lm63_update_device(struct device *dev);
 133
 134 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
 135 static void lm63_init_client(struct i2c_client *client);
 136
 137 /*
 138  * Driver data (common to all clients)
 139  */
 140
 141 static struct i2c_driver lm63_driver = {
 142         .owner          = THIS_MODULE,
 143         .name           = "lm63",
 144         .flags          = I2C_DF_NOTIFY,
 145         .attach_adapter = lm63_attach_adapter,
 146         .detach_client  = lm63_detach_client,
 147 };
 148
 149 /*
 150  * Client data (each client gets its own)
 151  */
 152
 153 struct lm63_data {
 154         struct i2c_client client;
 155         struct semaphore update_lock;
 156         char valid; /* zero until following fields are valid */
 157         unsigned long last_updated; /* in jiffies */
 158
 159         /* registers values */
 160         u8 config, config_fan;
 161         u16 fan[2];     /* 0: input
 162                            1: low limit */
 163         u8 pwm1_freq;
 164         u8 pwm1_value;
 165         s8 temp8[3];    /* 0: local input
 166                            1: local high limit
 167                            2: remote critical limit */
 168         s16 temp11[3];  /* 0: remote input
 169                            1: remote low limit
 170                            2: remote high limit */
 171         u8 temp2_crit_hyst;
 172         u8 alarms;
 173 };
 174
 175 /*
 176  * Sysfs callback functions and files
 177  */
 178
 179 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 180                         char *buf)
 181 {
 182         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 183         struct lm63_data *data = lm63_update_device(dev);
 184         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 185 }
 186
 187 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 188                        const char *buf, size_t count)
 189 {
 190         struct i2c_client *client = to_i2c_client(dev);
 191         struct lm63_data *data = i2c_get_clientdata(client);
 192         unsigned long val = simple_strtoul(buf, NULL, 10);
 193
 194         down(&data->update_lock);
 195         data->fan[1] = FAN_TO_REG(val);
 196         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 197                                   data->fan[1] & 0xFF);
 198         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 199                                   data->fan[1] >> 8);
 200         up(&data->update_lock);
 201         return count;
 202 }
 203
 204 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 205                          char *buf)
 206 {
 207         struct lm63_data *data = lm63_update_device(dev);
 208         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 209                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 210                        (2 * data->pwm1_freq));
 211 }
 212
 213 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 214                         const char *buf, size_t count)
 215 {
 216         struct i2c_client *client = to_i2c_client(dev);
 217         struct lm63_data *data = i2c_get_clientdata(client);
 218         unsigned long val;
 219
 220         if (!(data->config_fan & 0x20)) /* register is read-only */
 221                 return -EPERM;
 222
 223         val = simple_strtoul(buf, NULL, 10);
 224         down(&data->update_lock);
 225         data->pwm1_value = val <= 0 ? 0 :
 226                            val >= 255 ? 2 * data->pwm1_freq :
 227                            (val * data->pwm1_freq * 2 + 127) / 255;
 228         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 229         up(&data->update_lock);
 230         return count;
 231 }
 232
 233 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
 234                                 char *buf)
 235 {
 236         struct lm63_data *data = lm63_update_device(dev);
 237         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 238 }
 239
 240 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
 241                           char *buf)
 242 {
 243         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 244         struct lm63_data *data = lm63_update_device(dev);
 245         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 246 }
 247
 248 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
 249                          const char *buf, size_t count)
 250 {
 251         struct i2c_client *client = to_i2c_client(dev);
 252         struct lm63_data *data = i2c_get_clientdata(client);
 253         long val = simple_strtol(buf, NULL, 10);
 254
 255         down(&data->update_lock);
 256         data->temp8[1] = TEMP8_TO_REG(val);
 257         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 258         up(&data->update_lock);
 259         return count;
 260 }
 261
 262 static ssize_t show_temp11(struct device *dev, 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", TEMP11_FROM_REG(data->temp11[attr->index]));
 268 }
 269
 270 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 271                           const char *buf, size_t count)
 272 {
 273         static const u8 reg[4] = {
 274                 LM63_REG_REMOTE_LOW_MSB,
 275                 LM63_REG_REMOTE_LOW_LSB,
 276                 LM63_REG_REMOTE_HIGH_MSB,
 277                 LM63_REG_REMOTE_HIGH_LSB,
 278         };
 279
 280         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 281         struct i2c_client *client = to_i2c_client(dev);
 282         struct lm63_data *data = i2c_get_clientdata(client);
 283         long val = simple_strtol(buf, NULL, 10);
 284         int nr = attr->index;
 285
 286         down(&data->update_lock);
 287         data->temp11[nr] = TEMP11_TO_REG(val);
 288         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 289                                   data->temp11[nr] >> 8);
 290         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 291                                   data->temp11[nr] & 0xff);
 292         up(&data->update_lock);
 293         return count;
 294 }
 295
 296 /* Hysteresis register holds a relative value, while we want to present
 297    an absolute to user-space */
 298 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 299                                     char *buf)
 300 {
 301         struct lm63_data *data = lm63_update_device(dev);
 302         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 303                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 304 }
 305
 306 /* And now the other way around, user-space provides an absolute
 307    hysteresis value and we have to store a relative one */
 308 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 309                                    const char *buf, size_t count)
 310 {
 311         struct i2c_client *client = to_i2c_client(dev);
 312         struct lm63_data *data = i2c_get_clientdata(client);
 313         long val = simple_strtol(buf, NULL, 10);
 314         long hyst;
 315
 316         down(&data->update_lock);
 317         hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
 318         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 319                                   HYST_TO_REG(hyst));
 320         up(&data->update_lock);
 321         return count;
 322 }
 323
 324 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 325                            char *buf)
 326 {
 327         struct lm63_data *data = lm63_update_device(dev);
 328         return sprintf(buf, "%u\n", data->alarms);
 329 }
 330
 331 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 332 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 333         set_fan, 1);
 334
 335 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 336 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 337
 338 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
 339 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
 340         set_temp8, 1);
 341
 342 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 343 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 344         set_temp11, 1);
 345 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 346         set_temp11, 2);
 347 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
 348 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 349         set_temp2_crit_hyst);
 350
 351 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 352
 353 /*
 354  * Real code
 355  */
 356
 357 static int lm63_attach_adapter(struct i2c_adapter *adapter)
 358 {
 359         if (!(adapter->class & I2C_CLASS_HWMON))
 360                 return 0;
 361         return i2c_detect(adapter, &addr_data, lm63_detect);
 362 }
 363
 364 /*
 365  * The following function does more than just detection. If detection
 366  * succeeds, it also registers the new chip.
 367  */
 368 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
 369 {
 370         struct i2c_client *new_client;
 371         struct lm63_data *data;
 372         int err = 0;
 373
 374         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 375                 goto exit;
 376
 377         if (!(data = kmalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
 378                 err = -ENOMEM;
 379                 goto exit;
 380         }
 381         memset(data, 0, sizeof(struct lm63_data));
 382
 383         /* The common I2C client data is placed right before the
 384            LM63-specific data. */
 385         new_client = &data->client;
 386         i2c_set_clientdata(new_client, data);
 387         new_client->addr = address;
 388         new_client->adapter = adapter;
 389         new_client->driver = &lm63_driver;
 390         new_client->flags = 0;
 391
 392         /* Default to an LM63 if forced */
 393         if (kind == 0)
 394                 kind = lm63;
 395
 396         if (kind < 0) { /* must identify */
 397                 u8 man_id, chip_id, reg_config1, reg_config2;
 398                 u8 reg_alert_status, reg_alert_mask;
 399
 400                 man_id = i2c_smbus_read_byte_data(new_client,
 401                          LM63_REG_MAN_ID);
 402                 chip_id = i2c_smbus_read_byte_data(new_client,
 403                           LM63_REG_CHIP_ID);
 404                 reg_config1 = i2c_smbus_read_byte_data(new_client,
 405                               LM63_REG_CONFIG1);
 406                 reg_config2 = i2c_smbus_read_byte_data(new_client,
 407                               LM63_REG_CONFIG2);
 408                 reg_alert_status = i2c_smbus_read_byte_data(new_client,
 409                                    LM63_REG_ALERT_STATUS);
 410                 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 411                                  LM63_REG_ALERT_MASK);
 412
 413                 if (man_id == 0x01 /* National Semiconductor */
 414                  && chip_id == 0x41 /* LM63 */
 415                  && (reg_config1 & 0x18) == 0x00
 416                  && (reg_config2 & 0xF8) == 0x00
 417                  && (reg_alert_status & 0x20) == 0x00
 418                  && (reg_alert_mask & 0xA4) == 0xA4) {
 419                         kind = lm63;
 420                 } else { /* failed */
 421                         dev_dbg(&adapter->dev, "Unsupported chip "
 422                                 "(man_id=0x%02X, chip_id=0x%02X).\n",
 423                                 man_id, chip_id);
 424                         goto exit_free;
 425                 }
 426         }
 427
 428         strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
 429         data->valid = 0;
 430         init_MUTEX(&data->update_lock);
 431
 432         /* Tell the I2C layer a new client has arrived */
 433         if ((err = i2c_attach_client(new_client)))
 434                 goto exit_free;
 435
 436         /* Initialize the LM63 chip */
 437         lm63_init_client(new_client);
 438
 439         /* Register sysfs hooks */
 440         if (data->config & 0x04) { /* tachometer enabled */
 441                 device_create_file(&new_client->dev,
 442                                    &sensor_dev_attr_fan1_input.dev_attr);
 443                 device_create_file(&new_client->dev,
 444                                    &sensor_dev_attr_fan1_min.dev_attr);
 445         }
 446         device_create_file(&new_client->dev, &dev_attr_pwm1);
 447         device_create_file(&new_client->dev, &dev_attr_pwm1_enable);
 448         device_create_file(&new_client->dev,
 449                            &sensor_dev_attr_temp1_input.dev_attr);
 450         device_create_file(&new_client->dev,
 451                            &sensor_dev_attr_temp2_input.dev_attr);
 452         device_create_file(&new_client->dev,
 453                            &sensor_dev_attr_temp2_min.dev_attr);
 454         device_create_file(&new_client->dev,
 455                            &sensor_dev_attr_temp1_max.dev_attr);
 456         device_create_file(&new_client->dev,
 457                            &sensor_dev_attr_temp2_max.dev_attr);
 458         device_create_file(&new_client->dev,
 459                            &sensor_dev_attr_temp2_crit.dev_attr);
 460         device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst);
 461         device_create_file(&new_client->dev, &dev_attr_alarms);
 462
 463         return 0;
 464
 465 exit_free:
 466         kfree(data);
 467 exit:
 468         return err;
 469 }
 470
 471 /* Idealy we shouldn't have to initialize anything, since the BIOS
 472    should have taken care of everything */
 473 static void lm63_init_client(struct i2c_client *client)
 474 {
 475         struct lm63_data *data = i2c_get_clientdata(client);
 476
 477         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 478         data->config_fan = i2c_smbus_read_byte_data(client,
 479                                                     LM63_REG_CONFIG_FAN);
 480
 481         /* Start converting if needed */
 482         if (data->config & 0x40) { /* standby */
 483                 dev_dbg(&client->dev, "Switching to operational mode");
 484                 data->config &= 0xA7;
 485                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 486                                           data->config);
 487         }
 488
 489         /* We may need pwm1_freq before ever updating the client data */
 490         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 491         if (data->pwm1_freq == 0)
 492                 data->pwm1_freq = 1;
 493
 494         /* Show some debug info about the LM63 configuration */
 495         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 496                 (data->config & 0x04) ? "tachometer input" :
 497                 "alert output");
 498         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 499                 (data->config_fan & 0x08) ? "1.4" : "360",
 500                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 501         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 502                 (data->config_fan & 0x10) ? "low" : "high",
 503                 (data->config_fan & 0x20) ? "manual" : "auto");
 504 }
 505
 506 static int lm63_detach_client(struct i2c_client *client)
 507 {
 508         int err;
 509
 510         if ((err = i2c_detach_client(client))) {
 511                 dev_err(&client->dev, "Client deregistration failed, "
 512                         "client not detached\n");
 513                 return err;
 514         }
 515
 516         kfree(i2c_get_clientdata(client));
 517         return 0;
 518 }
 519
 520 static struct lm63_data *lm63_update_device(struct device *dev)
 521 {
 522         struct i2c_client *client = to_i2c_client(dev);
 523         struct lm63_data *data = i2c_get_clientdata(client);
 524
 525         down(&data->update_lock);
 526
 527         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 528                 if (data->config & 0x04) { /* tachometer enabled  */
 529                         /* order matters for fan1_input */
 530                         data->fan[0] = i2c_smbus_read_byte_data(client,
 531                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 532                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 533                                         LM63_REG_TACH_COUNT_MSB) << 8;
 534                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 535                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 536                                      | (i2c_smbus_read_byte_data(client,
 537                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 538                 }
 539
 540                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 541                                   LM63_REG_PWM_FREQ);
 542                 if (data->pwm1_freq == 0)
 543                         data->pwm1_freq = 1;
 544                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 545                                    LM63_REG_PWM_VALUE);
 546
 547                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 548                                  LM63_REG_LOCAL_TEMP);
 549                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 550                                  LM63_REG_LOCAL_HIGH);
 551
 552                 /* order matters for temp2_input */
 553                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 554                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 555                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 556                                    LM63_REG_REMOTE_TEMP_LSB);
 557                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 558                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 559                                 | i2c_smbus_read_byte_data(client,
 560                                   LM63_REG_REMOTE_LOW_LSB);
 561                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 562                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 563                                 | i2c_smbus_read_byte_data(client,
 564                                   LM63_REG_REMOTE_HIGH_LSB);
 565                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 566                                  LM63_REG_REMOTE_TCRIT);
 567                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 568                                         LM63_REG_REMOTE_TCRIT_HYST);
 569
 570                 data->alarms = i2c_smbus_read_byte_data(client,
 571                                LM63_REG_ALERT_STATUS) & 0x7F;
 572
 573                 data->last_updated = jiffies;
 574                 data->valid = 1;
 575         }
 576
 577         up(&data->update_lock);
 578
 579         return data;
 580 }
 581
 582 static int __init sensors_lm63_init(void)
 583 {
 584         return i2c_add_driver(&lm63_driver);
 585 }
 586
 587 static void __exit sensors_lm63_exit(void)
 588 {
 589         i2c_del_driver(&lm63_driver);
 590 }
 591
 592 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 593 MODULE_DESCRIPTION("LM63 driver");
 594 MODULE_LICENSE("GPL");
 595
 596 module_init(sensors_lm63_init);
 597 module_exit(sensors_lm63_exit);