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/hwmon-sysfs.h> 46 #include <linux/hwmon.h> 47 #include <linux/err.h> 48 #include <linux/mutex.h> 49 50 /* 51 * Addresses to scan 52 * Address is fully defined internally and cannot be changed. 53 */ 54 55 static unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; 56 57 /* 58 * Insmod parameters 59 */ 60 61 I2C_CLIENT_INSMOD_1(lm63); 62 63 /* 64 * The LM63 registers 65 */ 66 67 #define LM63_REG_CONFIG1 0x03 68 #define LM63_REG_CONFIG2 0xBF 69 #define LM63_REG_CONFIG_FAN 0x4A 70 71 #define LM63_REG_TACH_COUNT_MSB 0x47 72 #define LM63_REG_TACH_COUNT_LSB 0x46 73 #define LM63_REG_TACH_LIMIT_MSB 0x49 74 #define LM63_REG_TACH_LIMIT_LSB 0x48 75 76 #define LM63_REG_PWM_VALUE 0x4C 77 #define LM63_REG_PWM_FREQ 0x4D 78 79 #define LM63_REG_LOCAL_TEMP 0x00 80 #define LM63_REG_LOCAL_HIGH 0x05 81 82 #define LM63_REG_REMOTE_TEMP_MSB 0x01 83 #define LM63_REG_REMOTE_TEMP_LSB 0x10 84 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 85 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 86 #define LM63_REG_REMOTE_HIGH_MSB 0x07 87 #define LM63_REG_REMOTE_HIGH_LSB 0x13 88 #define LM63_REG_REMOTE_LOW_MSB 0x08 89 #define LM63_REG_REMOTE_LOW_LSB 0x14 90 #define LM63_REG_REMOTE_TCRIT 0x19 91 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 92 93 #define LM63_REG_ALERT_STATUS 0x02 94 #define LM63_REG_ALERT_MASK 0x16 95 96 #define LM63_REG_MAN_ID 0xFE 97 #define LM63_REG_CHIP_ID 0xFF 98 99 /* 100 * Conversions and various macros 101 * For tachometer counts, the LM63 uses 16-bit values. 102 * For local temperature and high limit, remote critical limit and hysteresis 103 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 104 * For remote temperature, low and high limits, it uses signed 11-bit values 105 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 106 */ 107 108 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 109 5400000 / (reg)) 110 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 111 (5400000 / (val)) & 0xFFFC) 112 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 113 #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ 114 (val) >= 127000 ? 127 : \ 115 (val) < 0 ? ((val) - 500) / 1000 : \ 116 ((val) + 500) / 1000) 117 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 118 #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ 119 (val) >= 127875 ? 0x7FE0 : \ 120 (val) < 0 ? ((val) - 62) / 125 * 32 : \ 121 ((val) + 62) / 125 * 32) 122 #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ 123 (val) >= 127000 ? 127 : \ 124 ((val) + 500) / 1000) 125 126 /* 127 * Functions declaration 128 */ 129 130 static int lm63_attach_adapter(struct i2c_adapter *adapter); 131 static int lm63_detach_client(struct i2c_client *client); 132 133 static struct lm63_data *lm63_update_device(struct device *dev); 134 135 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind); 136 static void lm63_init_client(struct i2c_client *client); 137 138 /* 139 * Driver data (common to all clients) 140 */ 141 142 static struct i2c_driver lm63_driver = { 143 .driver = { 144 .name = "lm63", 145 }, 146 .attach_adapter = lm63_attach_adapter, 147 .detach_client = lm63_detach_client, 148 }; 149 150 /* 151 * Client data (each client gets its own) 152 */ 153 154 struct lm63_data { 155 struct i2c_client client; 156 struct class_device *class_dev; 157 struct mutex update_lock; 158 char valid; /* zero until following fields are valid */ 159 unsigned long last_updated; /* in jiffies */ 160 161 /* registers values */ 162 u8 config, config_fan; 163 u16 fan[2]; /* 0: input 164 1: low limit */ 165 u8 pwm1_freq; 166 u8 pwm1_value; 167 s8 temp8[3]; /* 0: local input 168 1: local high limit 169 2: remote critical limit */ 170 s16 temp11[3]; /* 0: remote input 171 1: remote low limit 172 2: remote high limit */ 173 u8 temp2_crit_hyst; 174 u8 alarms; 175 }; 176 177 /* 178 * Sysfs callback functions and files 179 */ 180 181 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 182 char *buf) 183 { 184 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 185 struct lm63_data *data = lm63_update_device(dev); 186 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); 187 } 188 189 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 190 const char *buf, size_t count) 191 { 192 struct i2c_client *client = to_i2c_client(dev); 193 struct lm63_data *data = i2c_get_clientdata(client); 194 unsigned long val = simple_strtoul(buf, NULL, 10); 195 196 mutex_lock(&data->update_lock); 197 data->fan[1] = FAN_TO_REG(val); 198 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 199 data->fan[1] & 0xFF); 200 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 201 data->fan[1] >> 8); 202 mutex_unlock(&data->update_lock); 203 return count; 204 } 205 206 static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, 207 char *buf) 208 { 209 struct lm63_data *data = lm63_update_device(dev); 210 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? 211 255 : (data->pwm1_value * 255 + data->pwm1_freq) / 212 (2 * data->pwm1_freq)); 213 } 214 215 static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, 216 const char *buf, size_t count) 217 { 218 struct i2c_client *client = to_i2c_client(dev); 219 struct lm63_data *data = i2c_get_clientdata(client); 220 unsigned long val; 221 222 if (!(data->config_fan & 0x20)) /* register is read-only */ 223 return -EPERM; 224 225 val = simple_strtoul(buf, NULL, 10); 226 mutex_lock(&data->update_lock); 227 data->pwm1_value = val <= 0 ? 0 : 228 val >= 255 ? 2 * data->pwm1_freq : 229 (val * data->pwm1_freq * 2 + 127) / 255; 230 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); 231 mutex_unlock(&data->update_lock); 232 return count; 233 } 234 235 static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, 236 char *buf) 237 { 238 struct lm63_data *data = lm63_update_device(dev); 239 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 240 } 241 242 static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, 243 char *buf) 244 { 245 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 246 struct lm63_data *data = lm63_update_device(dev); 247 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 248 } 249 250 static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy, 251 const char *buf, size_t count) 252 { 253 struct i2c_client *client = to_i2c_client(dev); 254 struct lm63_data *data = i2c_get_clientdata(client); 255 long val = simple_strtol(buf, NULL, 10); 256 257 mutex_lock(&data->update_lock); 258 data->temp8[1] = TEMP8_TO_REG(val); 259 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); 260 mutex_unlock(&data->update_lock); 261 return count; 262 } 263 264 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 265 char *buf) 266 { 267 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 268 struct lm63_data *data = lm63_update_device(dev); 269 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])); 270 } 271 272 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 273 const char *buf, size_t count) 274 { 275 static const u8 reg[4] = { 276 LM63_REG_REMOTE_LOW_MSB, 277 LM63_REG_REMOTE_LOW_LSB, 278 LM63_REG_REMOTE_HIGH_MSB, 279 LM63_REG_REMOTE_HIGH_LSB, 280 }; 281 282 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 283 struct i2c_client *client = to_i2c_client(dev); 284 struct lm63_data *data = i2c_get_clientdata(client); 285 long val = simple_strtol(buf, NULL, 10); 286 int nr = attr->index; 287 288 mutex_lock(&data->update_lock); 289 data->temp11[nr] = TEMP11_TO_REG(val); 290 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 291 data->temp11[nr] >> 8); 292 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 293 data->temp11[nr] & 0xff); 294 mutex_unlock(&data->update_lock); 295 return count; 296 } 297 298 /* Hysteresis register holds a relative value, while we want to present 299 an absolute to user-space */ 300 static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, 301 char *buf) 302 { 303 struct lm63_data *data = lm63_update_device(dev); 304 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) 305 - TEMP8_FROM_REG(data->temp2_crit_hyst)); 306 } 307 308 /* And now the other way around, user-space provides an absolute 309 hysteresis value and we have to store a relative one */ 310 static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, 311 const char *buf, size_t count) 312 { 313 struct i2c_client *client = to_i2c_client(dev); 314 struct lm63_data *data = i2c_get_clientdata(client); 315 long val = simple_strtol(buf, NULL, 10); 316 long hyst; 317 318 mutex_lock(&data->update_lock); 319 hyst = TEMP8_FROM_REG(data->temp8[2]) - val; 320 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 321 HYST_TO_REG(hyst)); 322 mutex_unlock(&data->update_lock); 323 return count; 324 } 325 326 static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, 327 char *buf) 328 { 329 struct lm63_data *data = lm63_update_device(dev); 330 return sprintf(buf, "%u\n", data->alarms); 331 } 332 333 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 334 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 335 set_fan, 1); 336 337 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); 338 static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); 339 340 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0); 341 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, 342 set_temp8, 1); 343 344 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 345 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 346 set_temp11, 1); 347 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 348 set_temp11, 2); 349 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2); 350 static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, 351 set_temp2_crit_hyst); 352 353 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); 354 355 /* 356 * Real code 357 */ 358 359 static int lm63_attach_adapter(struct i2c_adapter *adapter) 360 { 361 if (!(adapter->class & I2C_CLASS_HWMON)) 362 return 0; 363 return i2c_probe(adapter, &addr_data, lm63_detect); 364 } 365 366 /* 367 * The following function does more than just detection. If detection 368 * succeeds, it also registers the new chip. 369 */ 370 static int lm63_detect(struct i2c_adapter *adapter, int address, int kind) 371 { 372 struct i2c_client *new_client; 373 struct lm63_data *data; 374 int err = 0; 375 376 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 377 goto exit; 378 379 if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) { 380 err = -ENOMEM; 381 goto exit; 382 } 383 384 /* The common I2C client data is placed right before the 385 LM63-specific data. */ 386 new_client = &data->client; 387 i2c_set_clientdata(new_client, data); 388 new_client->addr = address; 389 new_client->adapter = adapter; 390 new_client->driver = &lm63_driver; 391 new_client->flags = 0; 392 393 /* Default to an LM63 if forced */ 394 if (kind == 0) 395 kind = lm63; 396 397 if (kind < 0) { /* must identify */ 398 u8 man_id, chip_id, reg_config1, reg_config2; 399 u8 reg_alert_status, reg_alert_mask; 400 401 man_id = i2c_smbus_read_byte_data(new_client, 402 LM63_REG_MAN_ID); 403 chip_id = i2c_smbus_read_byte_data(new_client, 404 LM63_REG_CHIP_ID); 405 reg_config1 = i2c_smbus_read_byte_data(new_client, 406 LM63_REG_CONFIG1); 407 reg_config2 = i2c_smbus_read_byte_data(new_client, 408 LM63_REG_CONFIG2); 409 reg_alert_status = i2c_smbus_read_byte_data(new_client, 410 LM63_REG_ALERT_STATUS); 411 reg_alert_mask = i2c_smbus_read_byte_data(new_client, 412 LM63_REG_ALERT_MASK); 413 414 if (man_id == 0x01 /* National Semiconductor */ 415 && chip_id == 0x41 /* LM63 */ 416 && (reg_config1 & 0x18) == 0x00 417 && (reg_config2 & 0xF8) == 0x00 418 && (reg_alert_status & 0x20) == 0x00 419 && (reg_alert_mask & 0xA4) == 0xA4) { 420 kind = lm63; 421 } else { /* failed */ 422 dev_dbg(&adapter->dev, "Unsupported chip " 423 "(man_id=0x%02X, chip_id=0x%02X).\n", 424 man_id, chip_id); 425 goto exit_free; 426 } 427 } 428 429 strlcpy(new_client->name, "lm63", I2C_NAME_SIZE); 430 data->valid = 0; 431 mutex_init(&data->update_lock); 432 433 /* Tell the I2C layer a new client has arrived */ 434 if ((err = i2c_attach_client(new_client))) 435 goto exit_free; 436 437 /* Initialize the LM63 chip */ 438 lm63_init_client(new_client); 439 440 /* Register sysfs hooks */ 441 data->class_dev = hwmon_device_register(&new_client->dev); 442 if (IS_ERR(data->class_dev)) { 443 err = PTR_ERR(data->class_dev); 444 goto exit_detach; 445 } 446 447 if (data->config & 0x04) { /* tachometer enabled */ 448 device_create_file(&new_client->dev, 449 &sensor_dev_attr_fan1_input.dev_attr); 450 device_create_file(&new_client->dev, 451 &sensor_dev_attr_fan1_min.dev_attr); 452 } 453 device_create_file(&new_client->dev, &dev_attr_pwm1); 454 device_create_file(&new_client->dev, &dev_attr_pwm1_enable); 455 device_create_file(&new_client->dev, 456 &sensor_dev_attr_temp1_input.dev_attr); 457 device_create_file(&new_client->dev, 458 &sensor_dev_attr_temp2_input.dev_attr); 459 device_create_file(&new_client->dev, 460 &sensor_dev_attr_temp2_min.dev_attr); 461 device_create_file(&new_client->dev, 462 &sensor_dev_attr_temp1_max.dev_attr); 463 device_create_file(&new_client->dev, 464 &sensor_dev_attr_temp2_max.dev_attr); 465 device_create_file(&new_client->dev, 466 &sensor_dev_attr_temp2_crit.dev_attr); 467 device_create_file(&new_client->dev, &dev_attr_temp2_crit_hyst); 468 device_create_file(&new_client->dev, &dev_attr_alarms); 469 470 return 0; 471 472 exit_detach: 473 i2c_detach_client(new_client); 474 exit_free: 475 kfree(data); 476 exit: 477 return err; 478 } 479 480 /* Idealy we shouldn't have to initialize anything, since the BIOS 481 should have taken care of everything */ 482 static void lm63_init_client(struct i2c_client *client) 483 { 484 struct lm63_data *data = i2c_get_clientdata(client); 485 486 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 487 data->config_fan = i2c_smbus_read_byte_data(client, 488 LM63_REG_CONFIG_FAN); 489 490 /* Start converting if needed */ 491 if (data->config & 0x40) { /* standby */ 492 dev_dbg(&client->dev, "Switching to operational mode"); 493 data->config &= 0xA7; 494 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 495 data->config); 496 } 497 498 /* We may need pwm1_freq before ever updating the client data */ 499 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 500 if (data->pwm1_freq == 0) 501 data->pwm1_freq = 1; 502 503 /* Show some debug info about the LM63 configuration */ 504 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", 505 (data->config & 0x04) ? "tachometer input" : 506 "alert output"); 507 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", 508 (data->config_fan & 0x08) ? "1.4" : "360", 509 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 510 dev_dbg(&client->dev, "PWM output active %s, %s mode\n", 511 (data->config_fan & 0x10) ? "low" : "high", 512 (data->config_fan & 0x20) ? "manual" : "auto"); 513 } 514 515 static int lm63_detach_client(struct i2c_client *client) 516 { 517 struct lm63_data *data = i2c_get_clientdata(client); 518 int err; 519 520 hwmon_device_unregister(data->class_dev); 521 522 if ((err = i2c_detach_client(client))) 523 return err; 524 525 kfree(data); 526 return 0; 527 } 528 529 static struct lm63_data *lm63_update_device(struct device *dev) 530 { 531 struct i2c_client *client = to_i2c_client(dev); 532 struct lm63_data *data = i2c_get_clientdata(client); 533 534 mutex_lock(&data->update_lock); 535 536 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 537 if (data->config & 0x04) { /* tachometer enabled */ 538 /* order matters for fan1_input */ 539 data->fan[0] = i2c_smbus_read_byte_data(client, 540 LM63_REG_TACH_COUNT_LSB) & 0xFC; 541 data->fan[0] |= i2c_smbus_read_byte_data(client, 542 LM63_REG_TACH_COUNT_MSB) << 8; 543 data->fan[1] = (i2c_smbus_read_byte_data(client, 544 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 545 | (i2c_smbus_read_byte_data(client, 546 LM63_REG_TACH_LIMIT_MSB) << 8); 547 } 548 549 data->pwm1_freq = i2c_smbus_read_byte_data(client, 550 LM63_REG_PWM_FREQ); 551 if (data->pwm1_freq == 0) 552 data->pwm1_freq = 1; 553 data->pwm1_value = i2c_smbus_read_byte_data(client, 554 LM63_REG_PWM_VALUE); 555 556 data->temp8[0] = i2c_smbus_read_byte_data(client, 557 LM63_REG_LOCAL_TEMP); 558 data->temp8[1] = i2c_smbus_read_byte_data(client, 559 LM63_REG_LOCAL_HIGH); 560 561 /* order matters for temp2_input */ 562 data->temp11[0] = i2c_smbus_read_byte_data(client, 563 LM63_REG_REMOTE_TEMP_MSB) << 8; 564 data->temp11[0] |= i2c_smbus_read_byte_data(client, 565 LM63_REG_REMOTE_TEMP_LSB); 566 data->temp11[1] = (i2c_smbus_read_byte_data(client, 567 LM63_REG_REMOTE_LOW_MSB) << 8) 568 | i2c_smbus_read_byte_data(client, 569 LM63_REG_REMOTE_LOW_LSB); 570 data->temp11[2] = (i2c_smbus_read_byte_data(client, 571 LM63_REG_REMOTE_HIGH_MSB) << 8) 572 | i2c_smbus_read_byte_data(client, 573 LM63_REG_REMOTE_HIGH_LSB); 574 data->temp8[2] = i2c_smbus_read_byte_data(client, 575 LM63_REG_REMOTE_TCRIT); 576 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 577 LM63_REG_REMOTE_TCRIT_HYST); 578 579 data->alarms = i2c_smbus_read_byte_data(client, 580 LM63_REG_ALERT_STATUS) & 0x7F; 581 582 data->last_updated = jiffies; 583 data->valid = 1; 584 } 585 586 mutex_unlock(&data->update_lock); 587 588 return data; 589 } 590 591 static int __init sensors_lm63_init(void) 592 { 593 return i2c_add_driver(&lm63_driver); 594 } 595 596 static void __exit sensors_lm63_exit(void) 597 { 598 i2c_del_driver(&lm63_driver); 599 } 600 601 MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); 602 MODULE_DESCRIPTION("LM63 driver"); 603 MODULE_LICENSE("GPL"); 604 605 module_init(sensors_lm63_init); 606 module_exit(sensors_lm63_exit); 607