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  */
 102
 103 #define FAN_FROM_REG(reg)       ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
 104                                  5400000 / (reg))
 105 #define FAN_TO_REG(val)         ((val) <= 82 ? 0xFFFC : \
 106                                  (5400000 / (val)) & 0xFFFC)
 107 #define TEMP8_FROM_REG(reg)     ((reg) * 1000)
 108 #define TEMP8_TO_REG(val)       ((val) <= -128000 ? -128 : \
 109                                  (val) >= 127000 ? 127 : \
 110                                  (val) < 0 ? ((val) - 500) / 1000 : \
 111                                  ((val) + 500) / 1000)
 112 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 113 #define TEMP11_TO_REG(val)      ((val) <= -128000 ? 0x8000 : \
 114                                  (val) >= 127875 ? 0x7FE0 : \
 115                                  (val) < 0 ? ((val) - 62) / 125 * 32 : \
 116                                  ((val) + 62) / 125 * 32)
 117 #define HYST_TO_REG(val)        ((val) <= 0 ? 0 : \
 118                                  (val) >= 127000 ? 127 : \
 119                                  ((val) + 500) / 1000)
 120
 121 /*
 122  * Functions declaration
 123  */
 124
 125 static int lm63_probe(struct i2c_client *client,
 126                       const struct i2c_device_id *id);
 127 static int lm63_remove(struct i2c_client *client);
 128
 129 static struct lm63_data *lm63_update_device(struct device *dev);
 130
 131 static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
 132 static void lm63_init_client(struct i2c_client *client);
 133
 134 enum chips { lm63, lm64 };
 135
 136 /*
 137  * Driver data (common to all clients)
 138  */
 139
 140 static const struct i2c_device_id lm63_id[] = {
 141         { "lm63", lm63 },
 142         { "lm64", lm64 },
 143         { }
 144 };
 145 MODULE_DEVICE_TABLE(i2c, lm63_id);
 146
 147 static struct i2c_driver lm63_driver = {
 148         .class          = I2C_CLASS_HWMON,
 149         .driver = {
 150                 .name   = "lm63",
 151         },
 152         .probe          = lm63_probe,
 153         .remove         = lm63_remove,
 154         .id_table       = lm63_id,
 155         .detect         = lm63_detect,
 156         .address_list   = normal_i2c,
 157 };
 158
 159 /*
 160  * Client data (each client gets its own)
 161  */
 162
 163 struct lm63_data {
 164         struct device *hwmon_dev;
 165         struct mutex update_lock;
 166         char valid; /* zero until following fields are valid */
 167         unsigned long last_updated; /* in jiffies */
 168
 169         /* registers values */
 170         u8 config, config_fan;
 171         u16 fan[2];     /* 0: input
 172                            1: low limit */
 173         u8 pwm1_freq;
 174         u8 pwm1_value;
 175         s8 temp8[3];    /* 0: local input
 176                            1: local high limit
 177                            2: remote critical limit */
 178         s16 temp11[3];  /* 0: remote input
 179                            1: remote low limit
 180                            2: remote high limit */
 181         u8 temp2_crit_hyst;
 182         u8 alarms;
 183 };
 184
 185 /*
 186  * Sysfs callback functions and files
 187  */
 188
 189 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
 190                         char *buf)
 191 {
 192         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 193         struct lm63_data *data = lm63_update_device(dev);
 194         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
 195 }
 196
 197 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
 198                        const char *buf, size_t count)
 199 {
 200         struct i2c_client *client = to_i2c_client(dev);
 201         struct lm63_data *data = i2c_get_clientdata(client);
 202         unsigned long val = simple_strtoul(buf, NULL, 10);
 203
 204         mutex_lock(&data->update_lock);
 205         data->fan[1] = FAN_TO_REG(val);
 206         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
 207                                   data->fan[1] & 0xFF);
 208         i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
 209                                   data->fan[1] >> 8);
 210         mutex_unlock(&data->update_lock);
 211         return count;
 212 }
 213
 214 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
 215                          char *buf)
 216 {
 217         struct lm63_data *data = lm63_update_device(dev);
 218         return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
 219                        255 : (data->pwm1_value * 255 + data->pwm1_freq) /
 220                        (2 * data->pwm1_freq));
 221 }
 222
 223 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
 224                         const char *buf, size_t count)
 225 {
 226         struct i2c_client *client = to_i2c_client(dev);
 227         struct lm63_data *data = i2c_get_clientdata(client);
 228         unsigned long val;
 229
 230         if (!(data->config_fan & 0x20)) /* register is read-only */
 231                 return -EPERM;
 232
 233         val = simple_strtoul(buf, NULL, 10);
 234         mutex_lock(&data->update_lock);
 235         data->pwm1_value = val <= 0 ? 0 :
 236                            val >= 255 ? 2 * data->pwm1_freq :
 237                            (val * data->pwm1_freq * 2 + 127) / 255;
 238         i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
 239         mutex_unlock(&data->update_lock);
 240         return count;
 241 }
 242
 243 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
 244                                 char *buf)
 245 {
 246         struct lm63_data *data = lm63_update_device(dev);
 247         return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
 248 }
 249
 250 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
 251                           char *buf)
 252 {
 253         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 254         struct lm63_data *data = lm63_update_device(dev);
 255         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
 256 }
 257
 258 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
 259                          const char *buf, size_t count)
 260 {
 261         struct i2c_client *client = to_i2c_client(dev);
 262         struct lm63_data *data = i2c_get_clientdata(client);
 263         long val = simple_strtol(buf, NULL, 10);
 264
 265         mutex_lock(&data->update_lock);
 266         data->temp8[1] = TEMP8_TO_REG(val);
 267         i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
 268         mutex_unlock(&data->update_lock);
 269         return count;
 270 }
 271
 272 static ssize_t show_temp11(struct device *dev, 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", TEMP11_FROM_REG(data->temp11[attr->index]));
 278 }
 279
 280 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
 281                           const char *buf, size_t count)
 282 {
 283         static const u8 reg[4] = {
 284                 LM63_REG_REMOTE_LOW_MSB,
 285                 LM63_REG_REMOTE_LOW_LSB,
 286                 LM63_REG_REMOTE_HIGH_MSB,
 287                 LM63_REG_REMOTE_HIGH_LSB,
 288         };
 289
 290         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 291         struct i2c_client *client = to_i2c_client(dev);
 292         struct lm63_data *data = i2c_get_clientdata(client);
 293         long val = simple_strtol(buf, NULL, 10);
 294         int nr = attr->index;
 295
 296         mutex_lock(&data->update_lock);
 297         data->temp11[nr] = TEMP11_TO_REG(val);
 298         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
 299                                   data->temp11[nr] >> 8);
 300         i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
 301                                   data->temp11[nr] & 0xff);
 302         mutex_unlock(&data->update_lock);
 303         return count;
 304 }
 305
 306 /* Hysteresis register holds a relative value, while we want to present
 307    an absolute to user-space */
 308 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 309                                     char *buf)
 310 {
 311         struct lm63_data *data = lm63_update_device(dev);
 312         return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
 313                        - TEMP8_FROM_REG(data->temp2_crit_hyst));
 314 }
 315
 316 /* And now the other way around, user-space provides an absolute
 317    hysteresis value and we have to store a relative one */
 318 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
 319                                    const char *buf, size_t count)
 320 {
 321         struct i2c_client *client = to_i2c_client(dev);
 322         struct lm63_data *data = i2c_get_clientdata(client);
 323         long val = simple_strtol(buf, NULL, 10);
 324         long hyst;
 325
 326         mutex_lock(&data->update_lock);
 327         hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
 328         i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
 329                                   HYST_TO_REG(hyst));
 330         mutex_unlock(&data->update_lock);
 331         return count;
 332 }
 333
 334 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
 335                            char *buf)
 336 {
 337         struct lm63_data *data = lm63_update_device(dev);
 338         return sprintf(buf, "%u\n", data->alarms);
 339 }
 340
 341 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
 342                           char *buf)
 343 {
 344         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 345         struct lm63_data *data = lm63_update_device(dev);
 346         int bitnr = attr->index;
 347
 348         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
 349 }
 350
 351 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 352 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
 353         set_fan, 1);
 354
 355 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
 356 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
 357
 358 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
 359 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
 360         set_temp8, 1);
 361
 362 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
 363 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
 364         set_temp11, 1);
 365 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
 366         set_temp11, 2);
 367 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
 368 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
 369         set_temp2_crit_hyst);
 370
 371 /* Individual alarm files */
 372 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
 373 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
 374 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
 375 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
 376 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
 377 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
 378 /* Raw alarm file for compatibility */
 379 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
 380
 381 static struct attribute *lm63_attributes[] = {
 382         &dev_attr_pwm1.attr,
 383         &dev_attr_pwm1_enable.attr,
 384         &sensor_dev_attr_temp1_input.dev_attr.attr,
 385         &sensor_dev_attr_temp2_input.dev_attr.attr,
 386         &sensor_dev_attr_temp2_min.dev_attr.attr,
 387         &sensor_dev_attr_temp1_max.dev_attr.attr,
 388         &sensor_dev_attr_temp2_max.dev_attr.attr,
 389         &sensor_dev_attr_temp2_crit.dev_attr.attr,
 390         &dev_attr_temp2_crit_hyst.attr,
 391
 392         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
 393         &sensor_dev_attr_temp2_fault.dev_attr.attr,
 394         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
 395         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
 396         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 397         &dev_attr_alarms.attr,
 398         NULL
 399 };
 400
 401 static const struct attribute_group lm63_group = {
 402         .attrs = lm63_attributes,
 403 };
 404
 405 static struct attribute *lm63_attributes_fan1[] = {
 406         &sensor_dev_attr_fan1_input.dev_attr.attr,
 407         &sensor_dev_attr_fan1_min.dev_attr.attr,
 408
 409         &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
 410         NULL
 411 };
 412
 413 static const struct attribute_group lm63_group_fan1 = {
 414         .attrs = lm63_attributes_fan1,
 415 };
 416
 417 /*
 418  * Real code
 419  */
 420
 421 /* Return 0 if detection is successful, -ENODEV otherwise */
 422 static int lm63_detect(struct i2c_client *new_client,
 423                        struct i2c_board_info *info)
 424 {
 425         struct i2c_adapter *adapter = new_client->adapter;
 426         u8 man_id, chip_id, reg_config1, reg_config2;
 427         u8 reg_alert_status, reg_alert_mask;
 428         int address = new_client->addr;
 429
 430         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 431                 return -ENODEV;
 432
 433         man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
 434         chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
 435
 436         reg_config1 = i2c_smbus_read_byte_data(new_client,
 437                       LM63_REG_CONFIG1);
 438         reg_config2 = i2c_smbus_read_byte_data(new_client,
 439                       LM63_REG_CONFIG2);
 440         reg_alert_status = i2c_smbus_read_byte_data(new_client,
 441                            LM63_REG_ALERT_STATUS);
 442         reg_alert_mask = i2c_smbus_read_byte_data(new_client,
 443                          LM63_REG_ALERT_MASK);
 444
 445         if (man_id != 0x01 /* National Semiconductor */
 446          || (reg_config1 & 0x18) != 0x00
 447          || (reg_config2 & 0xF8) != 0x00
 448          || (reg_alert_status & 0x20) != 0x00
 449          || (reg_alert_mask & 0xA4) != 0xA4) {
 450                 dev_dbg(&adapter->dev,
 451                         "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
 452                         man_id, chip_id);
 453                 return -ENODEV;
 454         }
 455
 456         if (chip_id == 0x41 && address == 0x4c)
 457                 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
 458         else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
 459                 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
 460         else
 461                 return -ENODEV;
 462
 463         return 0;
 464 }
 465
 466 static int lm63_probe(struct i2c_client *new_client,
 467                       const struct i2c_device_id *id)
 468 {
 469         struct lm63_data *data;
 470         int err;
 471
 472         data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
 473         if (!data) {
 474                 err = -ENOMEM;
 475                 goto exit;
 476         }
 477
 478         i2c_set_clientdata(new_client, data);
 479         data->valid = 0;
 480         mutex_init(&data->update_lock);
 481
 482         /* Initialize the LM63 chip */
 483         lm63_init_client(new_client);
 484
 485         /* Register sysfs hooks */
 486         if ((err = sysfs_create_group(&new_client->dev.kobj,
 487                                       &lm63_group)))
 488                 goto exit_free;
 489         if (data->config & 0x04) { /* tachometer enabled */
 490                 if ((err = sysfs_create_group(&new_client->dev.kobj,
 491                                               &lm63_group_fan1)))
 492                         goto exit_remove_files;
 493         }
 494
 495         data->hwmon_dev = hwmon_device_register(&new_client->dev);
 496         if (IS_ERR(data->hwmon_dev)) {
 497                 err = PTR_ERR(data->hwmon_dev);
 498                 goto exit_remove_files;
 499         }
 500
 501         return 0;
 502
 503 exit_remove_files:
 504         sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
 505         sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
 506 exit_free:
 507         kfree(data);
 508 exit:
 509         return err;
 510 }
 511
 512 /* Idealy we shouldn't have to initialize anything, since the BIOS
 513    should have taken care of everything */
 514 static void lm63_init_client(struct i2c_client *client)
 515 {
 516         struct lm63_data *data = i2c_get_clientdata(client);
 517
 518         data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
 519         data->config_fan = i2c_smbus_read_byte_data(client,
 520                                                     LM63_REG_CONFIG_FAN);
 521
 522         /* Start converting if needed */
 523         if (data->config & 0x40) { /* standby */
 524                 dev_dbg(&client->dev, "Switching to operational mode\n");
 525                 data->config &= 0xA7;
 526                 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
 527                                           data->config);
 528         }
 529
 530         /* We may need pwm1_freq before ever updating the client data */
 531         data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
 532         if (data->pwm1_freq == 0)
 533                 data->pwm1_freq = 1;
 534
 535         /* Show some debug info about the LM63 configuration */
 536         dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
 537                 (data->config & 0x04) ? "tachometer input" :
 538                 "alert output");
 539         dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
 540                 (data->config_fan & 0x08) ? "1.4" : "360",
 541                 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
 542         dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
 543                 (data->config_fan & 0x10) ? "low" : "high",
 544                 (data->config_fan & 0x20) ? "manual" : "auto");
 545 }
 546
 547 static int lm63_remove(struct i2c_client *client)
 548 {
 549         struct lm63_data *data = i2c_get_clientdata(client);
 550
 551         hwmon_device_unregister(data->hwmon_dev);
 552         sysfs_remove_group(&client->dev.kobj, &lm63_group);
 553         sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
 554
 555         kfree(data);
 556         return 0;
 557 }
 558
 559 static struct lm63_data *lm63_update_device(struct device *dev)
 560 {
 561         struct i2c_client *client = to_i2c_client(dev);
 562         struct lm63_data *data = i2c_get_clientdata(client);
 563
 564         mutex_lock(&data->update_lock);
 565
 566         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 567                 if (data->config & 0x04) { /* tachometer enabled  */
 568                         /* order matters for fan1_input */
 569                         data->fan[0] = i2c_smbus_read_byte_data(client,
 570                                        LM63_REG_TACH_COUNT_LSB) & 0xFC;
 571                         data->fan[0] |= i2c_smbus_read_byte_data(client,
 572                                         LM63_REG_TACH_COUNT_MSB) << 8;
 573                         data->fan[1] = (i2c_smbus_read_byte_data(client,
 574                                         LM63_REG_TACH_LIMIT_LSB) & 0xFC)
 575                                      | (i2c_smbus_read_byte_data(client,
 576                                         LM63_REG_TACH_LIMIT_MSB) << 8);
 577                 }
 578
 579                 data->pwm1_freq = i2c_smbus_read_byte_data(client,
 580                                   LM63_REG_PWM_FREQ);
 581                 if (data->pwm1_freq == 0)
 582                         data->pwm1_freq = 1;
 583                 data->pwm1_value = i2c_smbus_read_byte_data(client,
 584                                    LM63_REG_PWM_VALUE);
 585
 586                 data->temp8[0] = i2c_smbus_read_byte_data(client,
 587                                  LM63_REG_LOCAL_TEMP);
 588                 data->temp8[1] = i2c_smbus_read_byte_data(client,
 589                                  LM63_REG_LOCAL_HIGH);
 590
 591                 /* order matters for temp2_input */
 592                 data->temp11[0] = i2c_smbus_read_byte_data(client,
 593                                   LM63_REG_REMOTE_TEMP_MSB) << 8;
 594                 data->temp11[0] |= i2c_smbus_read_byte_data(client,
 595                                    LM63_REG_REMOTE_TEMP_LSB);
 596                 data->temp11[1] = (i2c_smbus_read_byte_data(client,
 597                                   LM63_REG_REMOTE_LOW_MSB) << 8)
 598                                 | i2c_smbus_read_byte_data(client,
 599                                   LM63_REG_REMOTE_LOW_LSB);
 600                 data->temp11[2] = (i2c_smbus_read_byte_data(client,
 601                                   LM63_REG_REMOTE_HIGH_MSB) << 8)
 602                                 | i2c_smbus_read_byte_data(client,
 603                                   LM63_REG_REMOTE_HIGH_LSB);
 604                 data->temp8[2] = i2c_smbus_read_byte_data(client,
 605                                  LM63_REG_REMOTE_TCRIT);
 606                 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
 607                                         LM63_REG_REMOTE_TCRIT_HYST);
 608
 609                 data->alarms = i2c_smbus_read_byte_data(client,
 610                                LM63_REG_ALERT_STATUS) & 0x7F;
 611
 612                 data->last_updated = jiffies;
 613                 data->valid = 1;
 614         }
 615
 616         mutex_unlock(&data->update_lock);
 617
 618         return data;
 619 }
 620
 621 static int __init sensors_lm63_init(void)
 622 {
 623         return i2c_add_driver(&lm63_driver);
 624 }
 625
 626 static void __exit sensors_lm63_exit(void)
 627 {
 628         i2c_del_driver(&lm63_driver);
 629 }
 630
 631 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
 632 MODULE_DESCRIPTION("LM63 driver");
 633 MODULE_LICENSE("GPL");
 634
 635 module_init(sensors_lm63_init);
 636 module_exit(sensors_lm63_exit);