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 56static 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 128static int lm63_probe(struct i2c_client *client, 129 const struct i2c_device_id *id); 130static int lm63_remove(struct i2c_client *client); 131 132static struct lm63_data *lm63_update_device(struct device *dev); 133 134static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info); 135static void lm63_init_client(struct i2c_client *client); 136 137enum chips { lm63, lm64 }; 138 139/* 140 * Driver data (common to all clients) 141 */ 142 143static const struct i2c_device_id lm63_id[] = { 144 { "lm63", lm63 }, 145 { "lm64", lm64 }, 146 { } 147}; 148MODULE_DEVICE_TABLE(i2c, lm63_id); 149 150static 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 166struct 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 194static 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 202static 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 219static 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 228static 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 248static 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 */ 261static 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 270static 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 280static 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 295static 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 304static 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 */ 332static 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 */ 343static 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 359static 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 366static 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 376static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 377static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 378 set_fan, 1); 379 380static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); 381static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); 382 383static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 384static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 385 set_local_temp8, 1); 386 387static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 388static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 389 set_temp11, 1); 390static 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 */ 396static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 397 NULL, 2); 398static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, 399 set_temp2_crit_hyst); 400 401/* Individual alarm files */ 402static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 403static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 404static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 405static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 406static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 407static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 408/* Raw alarm file for compatibility */ 409static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 410 411static 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 431static const struct attribute_group lm63_group = { 432 .attrs = lm63_attributes, 433}; 434 435static 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 443static 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 */ 452static 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 496static 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 538exit_remove_files: 539 sysfs_remove_group(&new_client->dev.kobj, &lm63_group); 540 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1); 541exit_free: 542 kfree(data); 543exit: 544 return err; 545} 546 547/* Idealy we shouldn't have to initialize anything, since the BIOS 548 should have taken care of everything */ 549static 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 582static 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 594static 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 656static int __init sensors_lm63_init(void) 657{ 658 return i2c_add_driver(&lm63_driver); 659} 660 661static void __exit sensors_lm63_exit(void) 662{ 663 i2c_del_driver(&lm63_driver); 664} 665 666MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 667MODULE_DESCRIPTION("LM63 driver"); 668MODULE_LICENSE("GPL"); 669 670module_init(sensors_lm63_init); 671module_exit(sensors_lm63_exit); 672