1 /* 2 * A hwmon driver for the Analog Devices ADT7470 3 * Copyright (C) 2007 IBM 4 * 5 * Author: Darrick J. Wong <djwong@us.ibm.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 23 24 #include <linux/module.h> 25 #include <linux/jiffies.h> 26 #include <linux/i2c.h> 27 #include <linux/hwmon.h> 28 #include <linux/hwmon-sysfs.h> 29 #include <linux/err.h> 30 #include <linux/mutex.h> 31 #include <linux/delay.h> 32 #include <linux/log2.h> 33 #include <linux/kthread.h> 34 #include <linux/slab.h> 35 36 /* Addresses to scan */ 37 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END }; 38 39 /* ADT7470 registers */ 40 #define ADT7470_REG_BASE_ADDR 0x20 41 #define ADT7470_REG_TEMP_BASE_ADDR 0x20 42 #define ADT7470_REG_TEMP_MAX_ADDR 0x29 43 #define ADT7470_REG_FAN_BASE_ADDR 0x2A 44 #define ADT7470_REG_FAN_MAX_ADDR 0x31 45 #define ADT7470_REG_PWM_BASE_ADDR 0x32 46 #define ADT7470_REG_PWM_MAX_ADDR 0x35 47 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38 48 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B 49 #define ADT7470_REG_CFG 0x40 50 #define ADT7470_FSPD_MASK 0x04 51 #define ADT7470_REG_ALARM1 0x41 52 #define ADT7470_R1T_ALARM 0x01 53 #define ADT7470_R2T_ALARM 0x02 54 #define ADT7470_R3T_ALARM 0x04 55 #define ADT7470_R4T_ALARM 0x08 56 #define ADT7470_R5T_ALARM 0x10 57 #define ADT7470_R6T_ALARM 0x20 58 #define ADT7470_R7T_ALARM 0x40 59 #define ADT7470_OOL_ALARM 0x80 60 #define ADT7470_REG_ALARM2 0x42 61 #define ADT7470_R8T_ALARM 0x01 62 #define ADT7470_R9T_ALARM 0x02 63 #define ADT7470_R10T_ALARM 0x04 64 #define ADT7470_FAN1_ALARM 0x10 65 #define ADT7470_FAN2_ALARM 0x20 66 #define ADT7470_FAN3_ALARM 0x40 67 #define ADT7470_FAN4_ALARM 0x80 68 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44 69 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57 70 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58 71 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F 72 #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60 73 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67 74 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68 75 #define ADT7470_REG_PWM12_CFG 0x68 76 #define ADT7470_PWM2_AUTO_MASK 0x40 77 #define ADT7470_PWM1_AUTO_MASK 0x80 78 #define ADT7470_PWM_AUTO_MASK 0xC0 79 #define ADT7470_REG_PWM34_CFG 0x69 80 #define ADT7470_PWM3_AUTO_MASK 0x40 81 #define ADT7470_PWM4_AUTO_MASK 0x80 82 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A 83 #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D 84 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E 85 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71 86 #define ADT7470_REG_ACOUSTICS12 0x75 87 #define ADT7470_REG_ACOUSTICS34 0x76 88 #define ADT7470_REG_DEVICE 0x3D 89 #define ADT7470_REG_VENDOR 0x3E 90 #define ADT7470_REG_REVISION 0x3F 91 #define ADT7470_REG_ALARM1_MASK 0x72 92 #define ADT7470_REG_ALARM2_MASK 0x73 93 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C 94 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D 95 #define ADT7470_REG_MAX_ADDR 0x81 96 97 #define ADT7470_TEMP_COUNT 10 98 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x)) 99 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2)) 100 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \ 101 ((x) * 2) + 1) 102 103 #define ADT7470_FAN_COUNT 4 104 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2)) 105 #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2)) 106 #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2)) 107 108 #define ADT7470_PWM_COUNT 4 109 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x)) 110 #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x)) 111 #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x)) 112 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x)) 113 #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2)) 114 #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \ 115 ((x) / 2)) 116 117 #define ALARM2(x) ((x) << 8) 118 119 #define ADT7470_VENDOR 0x41 120 #define ADT7470_DEVICE 0x70 121 /* datasheet only mentions a revision 2 */ 122 #define ADT7470_REVISION 0x02 123 124 /* "all temps" according to hwmon sysfs interface spec */ 125 #define ADT7470_PWM_ALL_TEMPS 0x3FF 126 127 /* How often do we reread sensors values? (In jiffies) */ 128 #define SENSOR_REFRESH_INTERVAL (5 * HZ) 129 130 /* How often do we reread sensor limit values? (In jiffies) */ 131 #define LIMIT_REFRESH_INTERVAL (60 * HZ) 132 133 /* Wait at least 200ms per sensor for 10 sensors */ 134 #define TEMP_COLLECTION_TIME 2000 135 136 /* auto update thing won't fire more than every 2s */ 137 #define AUTO_UPDATE_INTERVAL 2000 138 139 /* datasheet says to divide this number by the fan reading to get fan rpm */ 140 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x)) 141 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM 142 #define FAN_PERIOD_INVALID 65535 143 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID) 144 145 struct adt7470_data { 146 struct device *hwmon_dev; 147 struct attribute_group attrs; 148 struct mutex lock; 149 char sensors_valid; 150 char limits_valid; 151 unsigned long sensors_last_updated; /* In jiffies */ 152 unsigned long limits_last_updated; /* In jiffies */ 153 154 int num_temp_sensors; /* -1 = probe */ 155 int temperatures_probed; 156 157 s8 temp[ADT7470_TEMP_COUNT]; 158 s8 temp_min[ADT7470_TEMP_COUNT]; 159 s8 temp_max[ADT7470_TEMP_COUNT]; 160 u16 fan[ADT7470_FAN_COUNT]; 161 u16 fan_min[ADT7470_FAN_COUNT]; 162 u16 fan_max[ADT7470_FAN_COUNT]; 163 u16 alarm; 164 u16 alarms_mask; 165 u8 force_pwm_max; 166 u8 pwm[ADT7470_PWM_COUNT]; 167 u8 pwm_max[ADT7470_PWM_COUNT]; 168 u8 pwm_automatic[ADT7470_PWM_COUNT]; 169 u8 pwm_min[ADT7470_PWM_COUNT]; 170 s8 pwm_tmin[ADT7470_PWM_COUNT]; 171 u8 pwm_auto_temp[ADT7470_PWM_COUNT]; 172 173 struct task_struct *auto_update; 174 struct completion auto_update_stop; 175 unsigned int auto_update_interval; 176 }; 177 178 static int adt7470_probe(struct i2c_client *client, 179 const struct i2c_device_id *id); 180 static int adt7470_detect(struct i2c_client *client, 181 struct i2c_board_info *info); 182 static int adt7470_remove(struct i2c_client *client); 183 184 static const struct i2c_device_id adt7470_id[] = { 185 { "adt7470", 0 }, 186 { } 187 }; 188 MODULE_DEVICE_TABLE(i2c, adt7470_id); 189 190 static struct i2c_driver adt7470_driver = { 191 .class = I2C_CLASS_HWMON, 192 .driver = { 193 .name = "adt7470", 194 }, 195 .probe = adt7470_probe, 196 .remove = adt7470_remove, 197 .id_table = adt7470_id, 198 .detect = adt7470_detect, 199 .address_list = normal_i2c, 200 }; 201 202 /* 203 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says 204 * that the low byte must be read before the high byte. 205 */ 206 static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg) 207 { 208 u16 foo; 209 foo = i2c_smbus_read_byte_data(client, reg); 210 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8); 211 return foo; 212 } 213 214 static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg, 215 u16 value) 216 { 217 return i2c_smbus_write_byte_data(client, reg, value & 0xFF) 218 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8); 219 } 220 221 static void adt7470_init_client(struct i2c_client *client) 222 { 223 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 224 225 if (reg < 0) { 226 dev_err(&client->dev, "cannot read configuration register\n"); 227 } else { 228 /* start monitoring (and do a self-test) */ 229 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3); 230 } 231 } 232 233 /* Probe for temperature sensors. Assumes lock is held */ 234 static int adt7470_read_temperatures(struct i2c_client *client, 235 struct adt7470_data *data) 236 { 237 unsigned long res; 238 int i; 239 u8 cfg, pwm[4], pwm_cfg[2]; 240 241 /* save pwm[1-4] config register */ 242 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0)); 243 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2)); 244 245 /* set manual pwm to whatever it is set to now */ 246 for (i = 0; i < ADT7470_FAN_COUNT; i++) 247 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i)); 248 249 /* put pwm in manual mode */ 250 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), 251 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK)); 252 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), 253 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK)); 254 255 /* write pwm control to whatever it was */ 256 for (i = 0; i < ADT7470_FAN_COUNT; i++) 257 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]); 258 259 /* start reading temperature sensors */ 260 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 261 cfg |= 0x80; 262 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); 263 264 /* Delay is 200ms * number of temp sensors. */ 265 res = msleep_interruptible((data->num_temp_sensors >= 0 ? 266 data->num_temp_sensors * 200 : 267 TEMP_COLLECTION_TIME)); 268 269 /* done reading temperature sensors */ 270 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 271 cfg &= ~0x80; 272 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); 273 274 /* restore pwm[1-4] config registers */ 275 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]); 276 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]); 277 278 if (res) { 279 pr_err("ha ha, interrupted\n"); 280 return -EAGAIN; 281 } 282 283 /* Only count fans if we have to */ 284 if (data->num_temp_sensors >= 0) 285 return 0; 286 287 for (i = 0; i < ADT7470_TEMP_COUNT; i++) { 288 data->temp[i] = i2c_smbus_read_byte_data(client, 289 ADT7470_TEMP_REG(i)); 290 if (data->temp[i]) 291 data->num_temp_sensors = i + 1; 292 } 293 data->temperatures_probed = 1; 294 return 0; 295 } 296 297 static int adt7470_update_thread(void *p) 298 { 299 struct i2c_client *client = p; 300 struct adt7470_data *data = i2c_get_clientdata(client); 301 302 while (!kthread_should_stop()) { 303 mutex_lock(&data->lock); 304 adt7470_read_temperatures(client, data); 305 mutex_unlock(&data->lock); 306 if (kthread_should_stop()) 307 break; 308 msleep_interruptible(data->auto_update_interval); 309 } 310 311 complete_all(&data->auto_update_stop); 312 return 0; 313 } 314 315 static struct adt7470_data *adt7470_update_device(struct device *dev) 316 { 317 struct i2c_client *client = to_i2c_client(dev); 318 struct adt7470_data *data = i2c_get_clientdata(client); 319 unsigned long local_jiffies = jiffies; 320 u8 cfg; 321 int i; 322 int need_sensors = 1; 323 int need_limits = 1; 324 325 /* 326 * Figure out if we need to update the shadow registers. 327 * Lockless means that we may occasionally report out of 328 * date data. 329 */ 330 if (time_before(local_jiffies, data->sensors_last_updated + 331 SENSOR_REFRESH_INTERVAL) && 332 data->sensors_valid) 333 need_sensors = 0; 334 335 if (time_before(local_jiffies, data->limits_last_updated + 336 LIMIT_REFRESH_INTERVAL) && 337 data->limits_valid) 338 need_limits = 0; 339 340 if (!need_sensors && !need_limits) 341 return data; 342 343 mutex_lock(&data->lock); 344 if (!need_sensors) 345 goto no_sensor_update; 346 347 if (!data->temperatures_probed) 348 adt7470_read_temperatures(client, data); 349 else 350 for (i = 0; i < ADT7470_TEMP_COUNT; i++) 351 data->temp[i] = i2c_smbus_read_byte_data(client, 352 ADT7470_TEMP_REG(i)); 353 354 for (i = 0; i < ADT7470_FAN_COUNT; i++) 355 data->fan[i] = adt7470_read_word_data(client, 356 ADT7470_REG_FAN(i)); 357 358 for (i = 0; i < ADT7470_PWM_COUNT; i++) { 359 int reg; 360 int reg_mask; 361 362 data->pwm[i] = i2c_smbus_read_byte_data(client, 363 ADT7470_REG_PWM(i)); 364 365 if (i % 2) 366 reg_mask = ADT7470_PWM2_AUTO_MASK; 367 else 368 reg_mask = ADT7470_PWM1_AUTO_MASK; 369 370 reg = ADT7470_REG_PWM_CFG(i); 371 if (i2c_smbus_read_byte_data(client, reg) & reg_mask) 372 data->pwm_automatic[i] = 1; 373 else 374 data->pwm_automatic[i] = 0; 375 376 reg = ADT7470_REG_PWM_AUTO_TEMP(i); 377 cfg = i2c_smbus_read_byte_data(client, reg); 378 if (!(i % 2)) 379 data->pwm_auto_temp[i] = cfg >> 4; 380 else 381 data->pwm_auto_temp[i] = cfg & 0xF; 382 } 383 384 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) & 385 ADT7470_FSPD_MASK) 386 data->force_pwm_max = 1; 387 else 388 data->force_pwm_max = 0; 389 390 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1); 391 if (data->alarm & ADT7470_OOL_ALARM) 392 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client, 393 ADT7470_REG_ALARM2)); 394 data->alarms_mask = adt7470_read_word_data(client, 395 ADT7470_REG_ALARM1_MASK); 396 397 data->sensors_last_updated = local_jiffies; 398 data->sensors_valid = 1; 399 400 no_sensor_update: 401 if (!need_limits) 402 goto out; 403 404 for (i = 0; i < ADT7470_TEMP_COUNT; i++) { 405 data->temp_min[i] = i2c_smbus_read_byte_data(client, 406 ADT7470_TEMP_MIN_REG(i)); 407 data->temp_max[i] = i2c_smbus_read_byte_data(client, 408 ADT7470_TEMP_MAX_REG(i)); 409 } 410 411 for (i = 0; i < ADT7470_FAN_COUNT; i++) { 412 data->fan_min[i] = adt7470_read_word_data(client, 413 ADT7470_REG_FAN_MIN(i)); 414 data->fan_max[i] = adt7470_read_word_data(client, 415 ADT7470_REG_FAN_MAX(i)); 416 } 417 418 for (i = 0; i < ADT7470_PWM_COUNT; i++) { 419 data->pwm_max[i] = i2c_smbus_read_byte_data(client, 420 ADT7470_REG_PWM_MAX(i)); 421 data->pwm_min[i] = i2c_smbus_read_byte_data(client, 422 ADT7470_REG_PWM_MIN(i)); 423 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client, 424 ADT7470_REG_PWM_TMIN(i)); 425 } 426 427 data->limits_last_updated = local_jiffies; 428 data->limits_valid = 1; 429 430 out: 431 mutex_unlock(&data->lock); 432 return data; 433 } 434 435 static ssize_t show_auto_update_interval(struct device *dev, 436 struct device_attribute *devattr, 437 char *buf) 438 { 439 struct adt7470_data *data = adt7470_update_device(dev); 440 return sprintf(buf, "%d\n", data->auto_update_interval); 441 } 442 443 static ssize_t set_auto_update_interval(struct device *dev, 444 struct device_attribute *devattr, 445 const char *buf, 446 size_t count) 447 { 448 struct i2c_client *client = to_i2c_client(dev); 449 struct adt7470_data *data = i2c_get_clientdata(client); 450 long temp; 451 452 if (kstrtol(buf, 10, &temp)) 453 return -EINVAL; 454 455 temp = SENSORS_LIMIT(temp, 0, 60000); 456 457 mutex_lock(&data->lock); 458 data->auto_update_interval = temp; 459 mutex_unlock(&data->lock); 460 461 return count; 462 } 463 464 static ssize_t show_num_temp_sensors(struct device *dev, 465 struct device_attribute *devattr, 466 char *buf) 467 { 468 struct adt7470_data *data = adt7470_update_device(dev); 469 return sprintf(buf, "%d\n", data->num_temp_sensors); 470 } 471 472 static ssize_t set_num_temp_sensors(struct device *dev, 473 struct device_attribute *devattr, 474 const char *buf, 475 size_t count) 476 { 477 struct i2c_client *client = to_i2c_client(dev); 478 struct adt7470_data *data = i2c_get_clientdata(client); 479 long temp; 480 481 if (kstrtol(buf, 10, &temp)) 482 return -EINVAL; 483 484 temp = SENSORS_LIMIT(temp, -1, 10); 485 486 mutex_lock(&data->lock); 487 data->num_temp_sensors = temp; 488 if (temp < 0) 489 data->temperatures_probed = 0; 490 mutex_unlock(&data->lock); 491 492 return count; 493 } 494 495 static ssize_t show_temp_min(struct device *dev, 496 struct device_attribute *devattr, 497 char *buf) 498 { 499 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 500 struct adt7470_data *data = adt7470_update_device(dev); 501 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]); 502 } 503 504 static ssize_t set_temp_min(struct device *dev, 505 struct device_attribute *devattr, 506 const char *buf, 507 size_t count) 508 { 509 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 510 struct i2c_client *client = to_i2c_client(dev); 511 struct adt7470_data *data = i2c_get_clientdata(client); 512 long temp; 513 514 if (kstrtol(buf, 10, &temp)) 515 return -EINVAL; 516 517 temp = DIV_ROUND_CLOSEST(temp, 1000); 518 temp = SENSORS_LIMIT(temp, 0, 255); 519 520 mutex_lock(&data->lock); 521 data->temp_min[attr->index] = temp; 522 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index), 523 temp); 524 mutex_unlock(&data->lock); 525 526 return count; 527 } 528 529 static ssize_t show_temp_max(struct device *dev, 530 struct device_attribute *devattr, 531 char *buf) 532 { 533 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 534 struct adt7470_data *data = adt7470_update_device(dev); 535 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]); 536 } 537 538 static ssize_t set_temp_max(struct device *dev, 539 struct device_attribute *devattr, 540 const char *buf, 541 size_t count) 542 { 543 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 544 struct i2c_client *client = to_i2c_client(dev); 545 struct adt7470_data *data = i2c_get_clientdata(client); 546 long temp; 547 548 if (kstrtol(buf, 10, &temp)) 549 return -EINVAL; 550 551 temp = DIV_ROUND_CLOSEST(temp, 1000); 552 temp = SENSORS_LIMIT(temp, 0, 255); 553 554 mutex_lock(&data->lock); 555 data->temp_max[attr->index] = temp; 556 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index), 557 temp); 558 mutex_unlock(&data->lock); 559 560 return count; 561 } 562 563 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, 564 char *buf) 565 { 566 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 567 struct adt7470_data *data = adt7470_update_device(dev); 568 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]); 569 } 570 571 static ssize_t show_alarm_mask(struct device *dev, 572 struct device_attribute *devattr, 573 char *buf) 574 { 575 struct adt7470_data *data = adt7470_update_device(dev); 576 577 return sprintf(buf, "%x\n", data->alarms_mask); 578 } 579 580 static ssize_t show_fan_max(struct device *dev, 581 struct device_attribute *devattr, 582 char *buf) 583 { 584 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 585 struct adt7470_data *data = adt7470_update_device(dev); 586 587 if (FAN_DATA_VALID(data->fan_max[attr->index])) 588 return sprintf(buf, "%d\n", 589 FAN_PERIOD_TO_RPM(data->fan_max[attr->index])); 590 else 591 return sprintf(buf, "0\n"); 592 } 593 594 static ssize_t set_fan_max(struct device *dev, 595 struct device_attribute *devattr, 596 const char *buf, size_t count) 597 { 598 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 599 struct i2c_client *client = to_i2c_client(dev); 600 struct adt7470_data *data = i2c_get_clientdata(client); 601 long temp; 602 603 if (kstrtol(buf, 10, &temp) || !temp) 604 return -EINVAL; 605 606 temp = FAN_RPM_TO_PERIOD(temp); 607 temp = SENSORS_LIMIT(temp, 1, 65534); 608 609 mutex_lock(&data->lock); 610 data->fan_max[attr->index] = temp; 611 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp); 612 mutex_unlock(&data->lock); 613 614 return count; 615 } 616 617 static ssize_t show_fan_min(struct device *dev, 618 struct device_attribute *devattr, 619 char *buf) 620 { 621 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 622 struct adt7470_data *data = adt7470_update_device(dev); 623 624 if (FAN_DATA_VALID(data->fan_min[attr->index])) 625 return sprintf(buf, "%d\n", 626 FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); 627 else 628 return sprintf(buf, "0\n"); 629 } 630 631 static ssize_t set_fan_min(struct device *dev, 632 struct device_attribute *devattr, 633 const char *buf, size_t count) 634 { 635 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 636 struct i2c_client *client = to_i2c_client(dev); 637 struct adt7470_data *data = i2c_get_clientdata(client); 638 long temp; 639 640 if (kstrtol(buf, 10, &temp) || !temp) 641 return -EINVAL; 642 643 temp = FAN_RPM_TO_PERIOD(temp); 644 temp = SENSORS_LIMIT(temp, 1, 65534); 645 646 mutex_lock(&data->lock); 647 data->fan_min[attr->index] = temp; 648 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp); 649 mutex_unlock(&data->lock); 650 651 return count; 652 } 653 654 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 655 char *buf) 656 { 657 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 658 struct adt7470_data *data = adt7470_update_device(dev); 659 660 if (FAN_DATA_VALID(data->fan[attr->index])) 661 return sprintf(buf, "%d\n", 662 FAN_PERIOD_TO_RPM(data->fan[attr->index])); 663 else 664 return sprintf(buf, "0\n"); 665 } 666 667 static ssize_t show_force_pwm_max(struct device *dev, 668 struct device_attribute *devattr, 669 char *buf) 670 { 671 struct adt7470_data *data = adt7470_update_device(dev); 672 return sprintf(buf, "%d\n", data->force_pwm_max); 673 } 674 675 static ssize_t set_force_pwm_max(struct device *dev, 676 struct device_attribute *devattr, 677 const char *buf, 678 size_t count) 679 { 680 struct i2c_client *client = to_i2c_client(dev); 681 struct adt7470_data *data = i2c_get_clientdata(client); 682 long temp; 683 u8 reg; 684 685 if (kstrtol(buf, 10, &temp)) 686 return -EINVAL; 687 688 mutex_lock(&data->lock); 689 data->force_pwm_max = temp; 690 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 691 if (temp) 692 reg |= ADT7470_FSPD_MASK; 693 else 694 reg &= ~ADT7470_FSPD_MASK; 695 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg); 696 mutex_unlock(&data->lock); 697 698 return count; 699 } 700 701 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr, 702 char *buf) 703 { 704 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 705 struct adt7470_data *data = adt7470_update_device(dev); 706 return sprintf(buf, "%d\n", data->pwm[attr->index]); 707 } 708 709 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr, 710 const char *buf, size_t count) 711 { 712 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 713 struct i2c_client *client = to_i2c_client(dev); 714 struct adt7470_data *data = i2c_get_clientdata(client); 715 long temp; 716 717 if (kstrtol(buf, 10, &temp)) 718 return -EINVAL; 719 720 temp = SENSORS_LIMIT(temp, 0, 255); 721 722 mutex_lock(&data->lock); 723 data->pwm[attr->index] = temp; 724 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp); 725 mutex_unlock(&data->lock); 726 727 return count; 728 } 729 730 static ssize_t show_pwm_max(struct device *dev, 731 struct device_attribute *devattr, 732 char *buf) 733 { 734 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 735 struct adt7470_data *data = adt7470_update_device(dev); 736 return sprintf(buf, "%d\n", data->pwm_max[attr->index]); 737 } 738 739 static ssize_t set_pwm_max(struct device *dev, 740 struct device_attribute *devattr, 741 const char *buf, 742 size_t count) 743 { 744 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 745 struct i2c_client *client = to_i2c_client(dev); 746 struct adt7470_data *data = i2c_get_clientdata(client); 747 long temp; 748 749 if (kstrtol(buf, 10, &temp)) 750 return -EINVAL; 751 752 temp = SENSORS_LIMIT(temp, 0, 255); 753 754 mutex_lock(&data->lock); 755 data->pwm_max[attr->index] = temp; 756 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index), 757 temp); 758 mutex_unlock(&data->lock); 759 760 return count; 761 } 762 763 static ssize_t show_pwm_min(struct device *dev, 764 struct device_attribute *devattr, 765 char *buf) 766 { 767 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 768 struct adt7470_data *data = adt7470_update_device(dev); 769 return sprintf(buf, "%d\n", data->pwm_min[attr->index]); 770 } 771 772 static ssize_t set_pwm_min(struct device *dev, 773 struct device_attribute *devattr, 774 const char *buf, 775 size_t count) 776 { 777 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 778 struct i2c_client *client = to_i2c_client(dev); 779 struct adt7470_data *data = i2c_get_clientdata(client); 780 long temp; 781 782 if (kstrtol(buf, 10, &temp)) 783 return -EINVAL; 784 785 temp = SENSORS_LIMIT(temp, 0, 255); 786 787 mutex_lock(&data->lock); 788 data->pwm_min[attr->index] = temp; 789 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index), 790 temp); 791 mutex_unlock(&data->lock); 792 793 return count; 794 } 795 796 static ssize_t show_pwm_tmax(struct device *dev, 797 struct device_attribute *devattr, 798 char *buf) 799 { 800 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 801 struct adt7470_data *data = adt7470_update_device(dev); 802 /* the datasheet says that tmax = tmin + 20C */ 803 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index])); 804 } 805 806 static ssize_t show_pwm_tmin(struct device *dev, 807 struct device_attribute *devattr, 808 char *buf) 809 { 810 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 811 struct adt7470_data *data = adt7470_update_device(dev); 812 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]); 813 } 814 815 static ssize_t set_pwm_tmin(struct device *dev, 816 struct device_attribute *devattr, 817 const char *buf, 818 size_t count) 819 { 820 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 821 struct i2c_client *client = to_i2c_client(dev); 822 struct adt7470_data *data = i2c_get_clientdata(client); 823 long temp; 824 825 if (kstrtol(buf, 10, &temp)) 826 return -EINVAL; 827 828 temp = DIV_ROUND_CLOSEST(temp, 1000); 829 temp = SENSORS_LIMIT(temp, 0, 255); 830 831 mutex_lock(&data->lock); 832 data->pwm_tmin[attr->index] = temp; 833 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index), 834 temp); 835 mutex_unlock(&data->lock); 836 837 return count; 838 } 839 840 static ssize_t show_pwm_auto(struct device *dev, 841 struct device_attribute *devattr, 842 char *buf) 843 { 844 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 845 struct adt7470_data *data = adt7470_update_device(dev); 846 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]); 847 } 848 849 static ssize_t set_pwm_auto(struct device *dev, 850 struct device_attribute *devattr, 851 const char *buf, 852 size_t count) 853 { 854 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 855 struct i2c_client *client = to_i2c_client(dev); 856 struct adt7470_data *data = i2c_get_clientdata(client); 857 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index); 858 int pwm_auto_reg_mask; 859 long temp; 860 u8 reg; 861 862 if (kstrtol(buf, 10, &temp)) 863 return -EINVAL; 864 865 if (attr->index % 2) 866 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK; 867 else 868 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK; 869 870 if (temp != 2 && temp != 1) 871 return -EINVAL; 872 temp--; 873 874 mutex_lock(&data->lock); 875 data->pwm_automatic[attr->index] = temp; 876 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 877 if (temp) 878 reg |= pwm_auto_reg_mask; 879 else 880 reg &= ~pwm_auto_reg_mask; 881 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 882 mutex_unlock(&data->lock); 883 884 return count; 885 } 886 887 static ssize_t show_pwm_auto_temp(struct device *dev, 888 struct device_attribute *devattr, 889 char *buf) 890 { 891 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 892 struct adt7470_data *data = adt7470_update_device(dev); 893 u8 ctrl = data->pwm_auto_temp[attr->index]; 894 895 if (ctrl) 896 return sprintf(buf, "%d\n", 1 << (ctrl - 1)); 897 else 898 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS); 899 } 900 901 static int cvt_auto_temp(int input) 902 { 903 if (input == ADT7470_PWM_ALL_TEMPS) 904 return 0; 905 if (input < 1 || !is_power_of_2(input)) 906 return -EINVAL; 907 return ilog2(input) + 1; 908 } 909 910 static ssize_t set_pwm_auto_temp(struct device *dev, 911 struct device_attribute *devattr, 912 const char *buf, 913 size_t count) 914 { 915 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 916 struct i2c_client *client = to_i2c_client(dev); 917 struct adt7470_data *data = i2c_get_clientdata(client); 918 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); 919 long temp; 920 u8 reg; 921 922 if (kstrtol(buf, 10, &temp)) 923 return -EINVAL; 924 925 temp = cvt_auto_temp(temp); 926 if (temp < 0) 927 return temp; 928 929 mutex_lock(&data->lock); 930 data->pwm_automatic[attr->index] = temp; 931 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 932 933 if (!(attr->index % 2)) { 934 reg &= 0xF; 935 reg |= (temp << 4) & 0xF0; 936 } else { 937 reg &= 0xF0; 938 reg |= temp & 0xF; 939 } 940 941 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 942 mutex_unlock(&data->lock); 943 944 return count; 945 } 946 947 static ssize_t show_alarm(struct device *dev, 948 struct device_attribute *devattr, 949 char *buf) 950 { 951 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 952 struct adt7470_data *data = adt7470_update_device(dev); 953 954 if (data->alarm & attr->index) 955 return sprintf(buf, "1\n"); 956 else 957 return sprintf(buf, "0\n"); 958 } 959 960 static DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarm_mask, NULL); 961 static DEVICE_ATTR(num_temp_sensors, S_IWUSR | S_IRUGO, show_num_temp_sensors, 962 set_num_temp_sensors); 963 static DEVICE_ATTR(auto_update_interval, S_IWUSR | S_IRUGO, 964 show_auto_update_interval, set_auto_update_interval); 965 966 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, 967 set_temp_max, 0); 968 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, 969 set_temp_max, 1); 970 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max, 971 set_temp_max, 2); 972 static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max, 973 set_temp_max, 3); 974 static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max, 975 set_temp_max, 4); 976 static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max, 977 set_temp_max, 5); 978 static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max, 979 set_temp_max, 6); 980 static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max, 981 set_temp_max, 7); 982 static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max, 983 set_temp_max, 8); 984 static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max, 985 set_temp_max, 9); 986 987 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, 988 set_temp_min, 0); 989 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, 990 set_temp_min, 1); 991 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min, 992 set_temp_min, 2); 993 static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min, 994 set_temp_min, 3); 995 static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min, 996 set_temp_min, 4); 997 static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min, 998 set_temp_min, 5); 999 static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min, 1000 set_temp_min, 6); 1001 static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min, 1002 set_temp_min, 7); 1003 static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min, 1004 set_temp_min, 8); 1005 static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min, 1006 set_temp_min, 9); 1007 1008 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); 1009 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); 1010 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); 1011 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); 1012 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); 1013 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); 1014 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); 1015 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); 1016 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8); 1017 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9); 1018 1019 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 1020 ADT7470_R1T_ALARM); 1021 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 1022 ADT7470_R2T_ALARM); 1023 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1024 ADT7470_R3T_ALARM); 1025 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1026 ADT7470_R4T_ALARM); 1027 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 1028 ADT7470_R5T_ALARM); 1029 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 1030 ADT7470_R6T_ALARM); 1031 static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL, 1032 ADT7470_R7T_ALARM); 1033 static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL, 1034 ALARM2(ADT7470_R8T_ALARM)); 1035 static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL, 1036 ALARM2(ADT7470_R9T_ALARM)); 1037 static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL, 1038 ALARM2(ADT7470_R10T_ALARM)); 1039 1040 static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max, 1041 set_fan_max, 0); 1042 static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max, 1043 set_fan_max, 1); 1044 static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max, 1045 set_fan_max, 2); 1046 static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max, 1047 set_fan_max, 3); 1048 1049 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 1050 set_fan_min, 0); 1051 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 1052 set_fan_min, 1); 1053 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, 1054 set_fan_min, 2); 1055 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min, 1056 set_fan_min, 3); 1057 1058 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 1059 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 1060 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 1061 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 1062 1063 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 1064 ALARM2(ADT7470_FAN1_ALARM)); 1065 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1066 ALARM2(ADT7470_FAN2_ALARM)); 1067 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 1068 ALARM2(ADT7470_FAN3_ALARM)); 1069 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 1070 ALARM2(ADT7470_FAN4_ALARM)); 1071 1072 static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO, 1073 show_force_pwm_max, set_force_pwm_max, 0); 1074 1075 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0); 1076 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1); 1077 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2); 1078 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3); 1079 1080 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 1081 show_pwm_min, set_pwm_min, 0); 1082 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO, 1083 show_pwm_min, set_pwm_min, 1); 1084 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO, 1085 show_pwm_min, set_pwm_min, 2); 1086 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO, 1087 show_pwm_min, set_pwm_min, 3); 1088 1089 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 1090 show_pwm_max, set_pwm_max, 0); 1091 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO, 1092 show_pwm_max, set_pwm_max, 1); 1093 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO, 1094 show_pwm_max, set_pwm_max, 2); 1095 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO, 1096 show_pwm_max, set_pwm_max, 3); 1097 1098 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 1099 show_pwm_tmin, set_pwm_tmin, 0); 1100 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO, 1101 show_pwm_tmin, set_pwm_tmin, 1); 1102 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO, 1103 show_pwm_tmin, set_pwm_tmin, 2); 1104 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO, 1105 show_pwm_tmin, set_pwm_tmin, 3); 1106 1107 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1108 NULL, 0); 1109 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1110 NULL, 1); 1111 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1112 NULL, 2); 1113 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1114 NULL, 3); 1115 1116 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1117 set_pwm_auto, 0); 1118 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1119 set_pwm_auto, 1); 1120 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1121 set_pwm_auto, 2); 1122 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1123 set_pwm_auto, 3); 1124 1125 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO, 1126 show_pwm_auto_temp, set_pwm_auto_temp, 0); 1127 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO, 1128 show_pwm_auto_temp, set_pwm_auto_temp, 1); 1129 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO, 1130 show_pwm_auto_temp, set_pwm_auto_temp, 2); 1131 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO, 1132 show_pwm_auto_temp, set_pwm_auto_temp, 3); 1133 1134 static struct attribute *adt7470_attr[] = { 1135 &dev_attr_alarm_mask.attr, 1136 &dev_attr_num_temp_sensors.attr, 1137 &dev_attr_auto_update_interval.attr, 1138 &sensor_dev_attr_temp1_max.dev_attr.attr, 1139 &sensor_dev_attr_temp2_max.dev_attr.attr, 1140 &sensor_dev_attr_temp3_max.dev_attr.attr, 1141 &sensor_dev_attr_temp4_max.dev_attr.attr, 1142 &sensor_dev_attr_temp5_max.dev_attr.attr, 1143 &sensor_dev_attr_temp6_max.dev_attr.attr, 1144 &sensor_dev_attr_temp7_max.dev_attr.attr, 1145 &sensor_dev_attr_temp8_max.dev_attr.attr, 1146 &sensor_dev_attr_temp9_max.dev_attr.attr, 1147 &sensor_dev_attr_temp10_max.dev_attr.attr, 1148 &sensor_dev_attr_temp1_min.dev_attr.attr, 1149 &sensor_dev_attr_temp2_min.dev_attr.attr, 1150 &sensor_dev_attr_temp3_min.dev_attr.attr, 1151 &sensor_dev_attr_temp4_min.dev_attr.attr, 1152 &sensor_dev_attr_temp5_min.dev_attr.attr, 1153 &sensor_dev_attr_temp6_min.dev_attr.attr, 1154 &sensor_dev_attr_temp7_min.dev_attr.attr, 1155 &sensor_dev_attr_temp8_min.dev_attr.attr, 1156 &sensor_dev_attr_temp9_min.dev_attr.attr, 1157 &sensor_dev_attr_temp10_min.dev_attr.attr, 1158 &sensor_dev_attr_temp1_input.dev_attr.attr, 1159 &sensor_dev_attr_temp2_input.dev_attr.attr, 1160 &sensor_dev_attr_temp3_input.dev_attr.attr, 1161 &sensor_dev_attr_temp4_input.dev_attr.attr, 1162 &sensor_dev_attr_temp5_input.dev_attr.attr, 1163 &sensor_dev_attr_temp6_input.dev_attr.attr, 1164 &sensor_dev_attr_temp7_input.dev_attr.attr, 1165 &sensor_dev_attr_temp8_input.dev_attr.attr, 1166 &sensor_dev_attr_temp9_input.dev_attr.attr, 1167 &sensor_dev_attr_temp10_input.dev_attr.attr, 1168 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1169 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1170 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1171 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 1172 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 1173 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 1174 &sensor_dev_attr_temp7_alarm.dev_attr.attr, 1175 &sensor_dev_attr_temp8_alarm.dev_attr.attr, 1176 &sensor_dev_attr_temp9_alarm.dev_attr.attr, 1177 &sensor_dev_attr_temp10_alarm.dev_attr.attr, 1178 &sensor_dev_attr_fan1_max.dev_attr.attr, 1179 &sensor_dev_attr_fan2_max.dev_attr.attr, 1180 &sensor_dev_attr_fan3_max.dev_attr.attr, 1181 &sensor_dev_attr_fan4_max.dev_attr.attr, 1182 &sensor_dev_attr_fan1_min.dev_attr.attr, 1183 &sensor_dev_attr_fan2_min.dev_attr.attr, 1184 &sensor_dev_attr_fan3_min.dev_attr.attr, 1185 &sensor_dev_attr_fan4_min.dev_attr.attr, 1186 &sensor_dev_attr_fan1_input.dev_attr.attr, 1187 &sensor_dev_attr_fan2_input.dev_attr.attr, 1188 &sensor_dev_attr_fan3_input.dev_attr.attr, 1189 &sensor_dev_attr_fan4_input.dev_attr.attr, 1190 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1191 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1192 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1193 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1194 &sensor_dev_attr_force_pwm_max.dev_attr.attr, 1195 &sensor_dev_attr_pwm1.dev_attr.attr, 1196 &sensor_dev_attr_pwm2.dev_attr.attr, 1197 &sensor_dev_attr_pwm3.dev_attr.attr, 1198 &sensor_dev_attr_pwm4.dev_attr.attr, 1199 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1200 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1201 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1202 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr, 1203 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1204 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1205 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1206 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr, 1207 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1208 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1209 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1210 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr, 1211 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1212 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1213 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1214 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr, 1215 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1216 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1217 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1218 &sensor_dev_attr_pwm4_enable.dev_attr.attr, 1219 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1220 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1221 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1222 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr, 1223 NULL 1224 }; 1225 1226 /* Return 0 if detection is successful, -ENODEV otherwise */ 1227 static int adt7470_detect(struct i2c_client *client, 1228 struct i2c_board_info *info) 1229 { 1230 struct i2c_adapter *adapter = client->adapter; 1231 int vendor, device, revision; 1232 1233 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1234 return -ENODEV; 1235 1236 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR); 1237 if (vendor != ADT7470_VENDOR) 1238 return -ENODEV; 1239 1240 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE); 1241 if (device != ADT7470_DEVICE) 1242 return -ENODEV; 1243 1244 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION); 1245 if (revision != ADT7470_REVISION) 1246 return -ENODEV; 1247 1248 strlcpy(info->type, "adt7470", I2C_NAME_SIZE); 1249 1250 return 0; 1251 } 1252 1253 static int adt7470_probe(struct i2c_client *client, 1254 const struct i2c_device_id *id) 1255 { 1256 struct adt7470_data *data; 1257 int err; 1258 1259 data = devm_kzalloc(&client->dev, sizeof(struct adt7470_data), 1260 GFP_KERNEL); 1261 if (!data) 1262 return -ENOMEM; 1263 1264 data->num_temp_sensors = -1; 1265 data->auto_update_interval = AUTO_UPDATE_INTERVAL; 1266 1267 i2c_set_clientdata(client, data); 1268 mutex_init(&data->lock); 1269 1270 dev_info(&client->dev, "%s chip found\n", client->name); 1271 1272 /* Initialize the ADT7470 chip */ 1273 adt7470_init_client(client); 1274 1275 /* Register sysfs hooks */ 1276 data->attrs.attrs = adt7470_attr; 1277 err = sysfs_create_group(&client->dev.kobj, &data->attrs); 1278 if (err) 1279 return err; 1280 1281 data->hwmon_dev = hwmon_device_register(&client->dev); 1282 if (IS_ERR(data->hwmon_dev)) { 1283 err = PTR_ERR(data->hwmon_dev); 1284 goto exit_remove; 1285 } 1286 1287 init_completion(&data->auto_update_stop); 1288 data->auto_update = kthread_run(adt7470_update_thread, client, 1289 dev_name(data->hwmon_dev)); 1290 if (IS_ERR(data->auto_update)) { 1291 err = PTR_ERR(data->auto_update); 1292 goto exit_unregister; 1293 } 1294 1295 return 0; 1296 1297 exit_unregister: 1298 hwmon_device_unregister(data->hwmon_dev); 1299 exit_remove: 1300 sysfs_remove_group(&client->dev.kobj, &data->attrs); 1301 return err; 1302 } 1303 1304 static int adt7470_remove(struct i2c_client *client) 1305 { 1306 struct adt7470_data *data = i2c_get_clientdata(client); 1307 1308 kthread_stop(data->auto_update); 1309 wait_for_completion(&data->auto_update_stop); 1310 hwmon_device_unregister(data->hwmon_dev); 1311 sysfs_remove_group(&client->dev.kobj, &data->attrs); 1312 return 0; 1313 } 1314 1315 module_i2c_driver(adt7470_driver); 1316 1317 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); 1318 MODULE_DESCRIPTION("ADT7470 driver"); 1319 MODULE_LICENSE("GPL"); 1320