1 /* 2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor 3 * with integrated fan control 4 * Copyright (C) 2004-2006 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 unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; 57 58 /* 59 * Insmod parameters 60 */ 61 62 I2C_CLIENT_INSMOD_1(lm63); 63 64 /* 65 * The LM63 registers 66 */ 67 68 #define LM63_REG_CONFIG1 0x03 69 #define LM63_REG_CONFIG2 0xBF 70 #define LM63_REG_CONFIG_FAN 0x4A 71 72 #define LM63_REG_TACH_COUNT_MSB 0x47 73 #define LM63_REG_TACH_COUNT_LSB 0x46 74 #define LM63_REG_TACH_LIMIT_MSB 0x49 75 #define LM63_REG_TACH_LIMIT_LSB 0x48 76 77 #define LM63_REG_PWM_VALUE 0x4C 78 #define LM63_REG_PWM_FREQ 0x4D 79 80 #define LM63_REG_LOCAL_TEMP 0x00 81 #define LM63_REG_LOCAL_HIGH 0x05 82 83 #define LM63_REG_REMOTE_TEMP_MSB 0x01 84 #define LM63_REG_REMOTE_TEMP_LSB 0x10 85 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 86 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 87 #define LM63_REG_REMOTE_HIGH_MSB 0x07 88 #define LM63_REG_REMOTE_HIGH_LSB 0x13 89 #define LM63_REG_REMOTE_LOW_MSB 0x08 90 #define LM63_REG_REMOTE_LOW_LSB 0x14 91 #define LM63_REG_REMOTE_TCRIT 0x19 92 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 93 94 #define LM63_REG_ALERT_STATUS 0x02 95 #define LM63_REG_ALERT_MASK 0x16 96 97 #define LM63_REG_MAN_ID 0xFE 98 #define LM63_REG_CHIP_ID 0xFF 99 100 /* 101 * Conversions and various macros 102 * For tachometer counts, the LM63 uses 16-bit values. 103 * For local temperature and high limit, remote critical limit and hysteresis 104 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 105 * For remote temperature, low and high limits, it uses signed 11-bit values 106 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 107 */ 108 109 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 110 5400000 / (reg)) 111 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 112 (5400000 / (val)) & 0xFFFC) 113 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 114 #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ 115 (val) >= 127000 ? 127 : \ 116 (val) < 0 ? ((val) - 500) / 1000 : \ 117 ((val) + 500) / 1000) 118 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 119 #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ 120 (val) >= 127875 ? 0x7FE0 : \ 121 (val) < 0 ? ((val) - 62) / 125 * 32 : \ 122 ((val) + 62) / 125 * 32) 123 #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ 124 (val) >= 127000 ? 127 : \ 125 ((val) + 500) / 1000) 126 127 /* 128 * Functions declaration 129 */ 130 131 static int lm63_attach_adapter(struct i2c_adapter *adapter); 132 static int lm63_detach_client(struct i2c_client *client); 133 134 static struct lm63_data *lm63_update_device(struct device *dev); 135 136 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind); 137 static void lm63_init_client(struct i2c_client *client); 138 139 /* 140 * Driver data (common to all clients) 141 */ 142 143 static struct i2c_driver lm63_driver = { 144 .driver = { 145 .name = "lm63", 146 }, 147 .attach_adapter = lm63_attach_adapter, 148 .detach_client = lm63_detach_client, 149 }; 150 151 /* 152 * Client data (each client gets its own) 153 */ 154 155 struct lm63_data { 156 struct i2c_client client; 157 struct class_device *class_dev; 158 struct mutex update_lock; 159 char valid; /* zero until following fields are valid */ 160 unsigned long last_updated; /* in jiffies */ 161 162 /* registers values */ 163 u8 config, config_fan; 164 u16 fan[2]; /* 0: input 165 1: low limit */ 166 u8 pwm1_freq; 167 u8 pwm1_value; 168 s8 temp8[3]; /* 0: local input 169 1: local high limit 170 2: remote critical limit */ 171 s16 temp11[3]; /* 0: remote input 172 1: remote low limit 173 2: remote high limit */ 174 u8 temp2_crit_hyst; 175 u8 alarms; 176 }; 177 178 /* 179 * Sysfs callback functions and files 180 */ 181 182 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 183 char *buf) 184 { 185 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 186 struct lm63_data *data = lm63_update_device(dev); 187 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); 188 } 189 190 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 191 const char *buf, size_t count) 192 { 193 struct i2c_client *client = to_i2c_client(dev); 194 struct lm63_data *data = i2c_get_clientdata(client); 195 unsigned long val = simple_strtoul(buf, NULL, 10); 196 197 mutex_lock(&data->update_lock); 198 data->fan[1] = FAN_TO_REG(val); 199 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 200 data->fan[1] & 0xFF); 201 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 202 data->fan[1] >> 8); 203 mutex_unlock(&data->update_lock); 204 return count; 205 } 206 207 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, 208 char *buf) 209 { 210 struct lm63_data *data = lm63_update_device(dev); 211 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? 212 255 : (data->pwm1_value * 255 + data->pwm1_freq) / 213 (2 * data->pwm1_freq)); 214 } 215 216 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, 217 const char *buf, size_t count) 218 { 219 struct i2c_client *client = to_i2c_client(dev); 220 struct lm63_data *data = i2c_get_clientdata(client); 221 unsigned long val; 222 223 if (!(data->config_fan & 0x20)) /* register is read-only */ 224 return -EPERM; 225 226 val = simple_strtoul(buf, NULL, 10); 227 mutex_lock(&data->update_lock); 228 data->pwm1_value = val <= 0 ? 0 : 229 val >= 255 ? 2 * data->pwm1_freq : 230 (val * data->pwm1_freq * 2 + 127) / 255; 231 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); 232 mutex_unlock(&data->update_lock); 233 return count; 234 } 235 236 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, 237 char *buf) 238 { 239 struct lm63_data *data = lm63_update_device(dev); 240 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 241 } 242 243 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, 244 char *buf) 245 { 246 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 247 struct lm63_data *data = lm63_update_device(dev); 248 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 249 } 250 251 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy, 252 const char *buf, size_t count) 253 { 254 struct i2c_client *client = to_i2c_client(dev); 255 struct lm63_data *data = i2c_get_clientdata(client); 256 long val = simple_strtol(buf, NULL, 10); 257 258 mutex_lock(&data->update_lock); 259 data->temp8[1] = TEMP8_TO_REG(val); 260 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); 261 mutex_unlock(&data->update_lock); 262 return count; 263 } 264 265 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 266 char *buf) 267 { 268 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 269 struct lm63_data *data = lm63_update_device(dev); 270 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])); 271 } 272 273 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 274 const char *buf, size_t count) 275 { 276 static const u8 reg[4] = { 277 LM63_REG_REMOTE_LOW_MSB, 278 LM63_REG_REMOTE_LOW_LSB, 279 LM63_REG_REMOTE_HIGH_MSB, 280 LM63_REG_REMOTE_HIGH_LSB, 281 }; 282 283 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 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 int nr = attr->index; 288 289 mutex_lock(&data->update_lock); 290 data->temp11[nr] = TEMP11_TO_REG(val); 291 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 292 data->temp11[nr] >> 8); 293 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 294 data->temp11[nr] & 0xff); 295 mutex_unlock(&data->update_lock); 296 return count; 297 } 298 299 /* Hysteresis register holds a relative value, while we want to present 300 an absolute to user-space */ 301 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, 302 char *buf) 303 { 304 struct lm63_data *data = lm63_update_device(dev); 305 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) 306 - TEMP8_FROM_REG(data->temp2_crit_hyst)); 307 } 308 309 /* And now the other way around, user-space provides an absolute 310 hysteresis value and we have to store a relative one */ 311 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, 312 const char *buf, size_t count) 313 { 314 struct i2c_client *client = to_i2c_client(dev); 315 struct lm63_data *data = i2c_get_clientdata(client); 316 long val = simple_strtol(buf, NULL, 10); 317 long hyst; 318 319 mutex_lock(&data->update_lock); 320 hyst = TEMP8_FROM_REG(data->temp8[2]) - val; 321 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 322 HYST_TO_REG(hyst)); 323 mutex_unlock(&data->update_lock); 324 return count; 325 } 326 327 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, 328 char *buf) 329 { 330 struct lm63_data *data = lm63_update_device(dev); 331 return sprintf(buf, "%u\n", data->alarms); 332 } 333 334 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 335 char *buf) 336 { 337 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 338 struct lm63_data *data = lm63_update_device(dev); 339 int bitnr = attr->index; 340 341 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 342 } 343 344 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 345 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 346 set_fan, 1); 347 348 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); 349 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); 350 351 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0); 352 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, 353 set_temp8, 1); 354 355 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 356 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 357 set_temp11, 1); 358 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 359 set_temp11, 2); 360 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2); 361 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, 362 set_temp2_crit_hyst); 363 364 /* Individual alarm files */ 365 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 366 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 367 static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 2); 368 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 369 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 370 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 371 /* Raw alarm file for compatibility */ 372 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 373 374 static struct attribute *lm63_attributes[] = { 375 &dev_attr_pwm1.attr, 376 &dev_attr_pwm1_enable.attr, 377 &sensor_dev_attr_temp1_input.dev_attr.attr, 378 &sensor_dev_attr_temp2_input.dev_attr.attr, 379 &sensor_dev_attr_temp2_min.dev_attr.attr, 380 &sensor_dev_attr_temp1_max.dev_attr.attr, 381 &sensor_dev_attr_temp2_max.dev_attr.attr, 382 &sensor_dev_attr_temp2_crit.dev_attr.attr, 383 &dev_attr_temp2_crit_hyst.attr, 384 385 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 386 &sensor_dev_attr_temp2_input_fault.dev_attr.attr, 387 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 388 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 389 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 390 &dev_attr_alarms.attr, 391 NULL 392 }; 393 394 static const struct attribute_group lm63_group = { 395 .attrs = lm63_attributes, 396 }; 397 398 static struct attribute *lm63_attributes_fan1[] = { 399 &sensor_dev_attr_fan1_input.dev_attr.attr, 400 &sensor_dev_attr_fan1_min.dev_attr.attr, 401 402 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 403 NULL 404 }; 405 406 static const struct attribute_group lm63_group_fan1 = { 407 .attrs = lm63_attributes_fan1, 408 }; 409 410 /* 411 * Real code 412 */ 413 414 static int lm63_attach_adapter(struct i2c_adapter *adapter) 415 { 416 if (!(adapter->class & I2C_CLASS_HWMON)) 417 return 0; 418 return i2c_probe(adapter, &addr_data, lm63_detect); 419 } 420 421 /* 422 * The following function does more than just detection. If detection 423 * succeeds, it also registers the new chip. 424 */ 425 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind) 426 { 427 struct i2c_client *new_client; 428 struct lm63_data *data; 429 int err = 0; 430 431 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 432 goto exit; 433 434 if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) { 435 err = -ENOMEM; 436 goto exit; 437 } 438 439 /* The common I2C client data is placed right before the 440 LM63-specific data. */ 441 new_client = &data->client; 442 i2c_set_clientdata(new_client, data); 443 new_client->addr = address; 444 new_client->adapter = adapter; 445 new_client->driver = &lm63_driver; 446 new_client->flags = 0; 447 448 /* Default to an LM63 if forced */ 449 if (kind == 0) 450 kind = lm63; 451 452 if (kind < 0) { /* must identify */ 453 u8 man_id, chip_id, reg_config1, reg_config2; 454 u8 reg_alert_status, reg_alert_mask; 455 456 man_id = i2c_smbus_read_byte_data(new_client, 457 LM63_REG_MAN_ID); 458 chip_id = i2c_smbus_read_byte_data(new_client, 459 LM63_REG_CHIP_ID); 460 reg_config1 = i2c_smbus_read_byte_data(new_client, 461 LM63_REG_CONFIG1); 462 reg_config2 = i2c_smbus_read_byte_data(new_client, 463 LM63_REG_CONFIG2); 464 reg_alert_status = i2c_smbus_read_byte_data(new_client, 465 LM63_REG_ALERT_STATUS); 466 reg_alert_mask = i2c_smbus_read_byte_data(new_client, 467 LM63_REG_ALERT_MASK); 468 469 if (man_id == 0x01 /* National Semiconductor */ 470 && chip_id == 0x41 /* LM63 */ 471 && (reg_config1 & 0x18) == 0x00 472 && (reg_config2 & 0xF8) == 0x00 473 && (reg_alert_status & 0x20) == 0x00 474 && (reg_alert_mask & 0xA4) == 0xA4) { 475 kind = lm63; 476 } else { /* failed */ 477 dev_dbg(&adapter->dev, "Unsupported chip " 478 "(man_id=0x%02X, chip_id=0x%02X).\n", 479 man_id, chip_id); 480 goto exit_free; 481 } 482 } 483 484 strlcpy(new_client->name, "lm63", I2C_NAME_SIZE); 485 data->valid = 0; 486 mutex_init(&data->update_lock); 487 488 /* Tell the I2C layer a new client has arrived */ 489 if ((err = i2c_attach_client(new_client))) 490 goto exit_free; 491 492 /* Initialize the LM63 chip */ 493 lm63_init_client(new_client); 494 495 /* Register sysfs hooks */ 496 if ((err = sysfs_create_group(&new_client->dev.kobj, 497 &lm63_group))) 498 goto exit_detach; 499 if (data->config & 0x04) { /* tachometer enabled */ 500 if ((err = sysfs_create_group(&new_client->dev.kobj, 501 &lm63_group_fan1))) 502 goto exit_remove_files; 503 } 504 505 data->class_dev = hwmon_device_register(&new_client->dev); 506 if (IS_ERR(data->class_dev)) { 507 err = PTR_ERR(data->class_dev); 508 goto exit_remove_files; 509 } 510 511 return 0; 512 513 exit_remove_files: 514 sysfs_remove_group(&new_client->dev.kobj, &lm63_group); 515 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1); 516 exit_detach: 517 i2c_detach_client(new_client); 518 exit_free: 519 kfree(data); 520 exit: 521 return err; 522 } 523 524 /* Idealy we shouldn't have to initialize anything, since the BIOS 525 should have taken care of everything */ 526 static void lm63_init_client(struct i2c_client *client) 527 { 528 struct lm63_data *data = i2c_get_clientdata(client); 529 530 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 531 data->config_fan = i2c_smbus_read_byte_data(client, 532 LM63_REG_CONFIG_FAN); 533 534 /* Start converting if needed */ 535 if (data->config & 0x40) { /* standby */ 536 dev_dbg(&client->dev, "Switching to operational mode"); 537 data->config &= 0xA7; 538 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 539 data->config); 540 } 541 542 /* We may need pwm1_freq before ever updating the client data */ 543 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 544 if (data->pwm1_freq == 0) 545 data->pwm1_freq = 1; 546 547 /* Show some debug info about the LM63 configuration */ 548 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", 549 (data->config & 0x04) ? "tachometer input" : 550 "alert output"); 551 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", 552 (data->config_fan & 0x08) ? "1.4" : "360", 553 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 554 dev_dbg(&client->dev, "PWM output active %s, %s mode\n", 555 (data->config_fan & 0x10) ? "low" : "high", 556 (data->config_fan & 0x20) ? "manual" : "auto"); 557 } 558 559 static int lm63_detach_client(struct i2c_client *client) 560 { 561 struct lm63_data *data = i2c_get_clientdata(client); 562 int err; 563 564 hwmon_device_unregister(data->class_dev); 565 sysfs_remove_group(&client->dev.kobj, &lm63_group); 566 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); 567 568 if ((err = i2c_detach_client(client))) 569 return err; 570 571 kfree(data); 572 return 0; 573 } 574 575 static struct lm63_data *lm63_update_device(struct device *dev) 576 { 577 struct i2c_client *client = to_i2c_client(dev); 578 struct lm63_data *data = i2c_get_clientdata(client); 579 580 mutex_lock(&data->update_lock); 581 582 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 583 if (data->config & 0x04) { /* tachometer enabled */ 584 /* order matters for fan1_input */ 585 data->fan[0] = i2c_smbus_read_byte_data(client, 586 LM63_REG_TACH_COUNT_LSB) & 0xFC; 587 data->fan[0] |= i2c_smbus_read_byte_data(client, 588 LM63_REG_TACH_COUNT_MSB) << 8; 589 data->fan[1] = (i2c_smbus_read_byte_data(client, 590 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 591 | (i2c_smbus_read_byte_data(client, 592 LM63_REG_TACH_LIMIT_MSB) << 8); 593 } 594 595 data->pwm1_freq = i2c_smbus_read_byte_data(client, 596 LM63_REG_PWM_FREQ); 597 if (data->pwm1_freq == 0) 598 data->pwm1_freq = 1; 599 data->pwm1_value = i2c_smbus_read_byte_data(client, 600 LM63_REG_PWM_VALUE); 601 602 data->temp8[0] = i2c_smbus_read_byte_data(client, 603 LM63_REG_LOCAL_TEMP); 604 data->temp8[1] = i2c_smbus_read_byte_data(client, 605 LM63_REG_LOCAL_HIGH); 606 607 /* order matters for temp2_input */ 608 data->temp11[0] = i2c_smbus_read_byte_data(client, 609 LM63_REG_REMOTE_TEMP_MSB) << 8; 610 data->temp11[0] |= i2c_smbus_read_byte_data(client, 611 LM63_REG_REMOTE_TEMP_LSB); 612 data->temp11[1] = (i2c_smbus_read_byte_data(client, 613 LM63_REG_REMOTE_LOW_MSB) << 8) 614 | i2c_smbus_read_byte_data(client, 615 LM63_REG_REMOTE_LOW_LSB); 616 data->temp11[2] = (i2c_smbus_read_byte_data(client, 617 LM63_REG_REMOTE_HIGH_MSB) << 8) 618 | i2c_smbus_read_byte_data(client, 619 LM63_REG_REMOTE_HIGH_LSB); 620 data->temp8[2] = i2c_smbus_read_byte_data(client, 621 LM63_REG_REMOTE_TCRIT); 622 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 623 LM63_REG_REMOTE_TCRIT_HYST); 624 625 data->alarms = i2c_smbus_read_byte_data(client, 626 LM63_REG_ALERT_STATUS) & 0x7F; 627 628 data->last_updated = jiffies; 629 data->valid = 1; 630 } 631 632 mutex_unlock(&data->update_lock); 633 634 return data; 635 } 636 637 static int __init sensors_lm63_init(void) 638 { 639 return i2c_add_driver(&lm63_driver); 640 } 641 642 static void __exit sensors_lm63_exit(void) 643 { 644 i2c_del_driver(&lm63_driver); 645 } 646 647 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 648 MODULE_DESCRIPTION("LM63 driver"); 649 MODULE_LICENSE("GPL"); 650 651 module_init(sensors_lm63_init); 652 module_exit(sensors_lm63_exit); 653