1 /* 2 * A hwmon driver for the Analog Devices ADT7470 3 * Copyright (C) 2007 IBM 4 * 5 * Author: Darrick J. Wong <darrick.wong@oracle.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 #include <linux/util_macros.h> 36 37 /* Addresses to scan */ 38 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END }; 39 40 /* ADT7470 registers */ 41 #define ADT7470_REG_BASE_ADDR 0x20 42 #define ADT7470_REG_TEMP_BASE_ADDR 0x20 43 #define ADT7470_REG_TEMP_MAX_ADDR 0x29 44 #define ADT7470_REG_FAN_BASE_ADDR 0x2A 45 #define ADT7470_REG_FAN_MAX_ADDR 0x31 46 #define ADT7470_REG_PWM_BASE_ADDR 0x32 47 #define ADT7470_REG_PWM_MAX_ADDR 0x35 48 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38 49 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B 50 #define ADT7470_REG_CFG 0x40 51 #define ADT7470_FSPD_MASK 0x04 52 #define ADT7470_REG_ALARM1 0x41 53 #define ADT7470_R1T_ALARM 0x01 54 #define ADT7470_R2T_ALARM 0x02 55 #define ADT7470_R3T_ALARM 0x04 56 #define ADT7470_R4T_ALARM 0x08 57 #define ADT7470_R5T_ALARM 0x10 58 #define ADT7470_R6T_ALARM 0x20 59 #define ADT7470_R7T_ALARM 0x40 60 #define ADT7470_OOL_ALARM 0x80 61 #define ADT7470_REG_ALARM2 0x42 62 #define ADT7470_R8T_ALARM 0x01 63 #define ADT7470_R9T_ALARM 0x02 64 #define ADT7470_R10T_ALARM 0x04 65 #define ADT7470_FAN1_ALARM 0x10 66 #define ADT7470_FAN2_ALARM 0x20 67 #define ADT7470_FAN3_ALARM 0x40 68 #define ADT7470_FAN4_ALARM 0x80 69 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44 70 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57 71 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58 72 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F 73 #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60 74 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67 75 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68 76 #define ADT7470_REG_PWM12_CFG 0x68 77 #define ADT7470_PWM2_AUTO_MASK 0x40 78 #define ADT7470_PWM1_AUTO_MASK 0x80 79 #define ADT7470_PWM_AUTO_MASK 0xC0 80 #define ADT7470_REG_PWM34_CFG 0x69 81 #define ADT7470_PWM3_AUTO_MASK 0x40 82 #define ADT7470_PWM4_AUTO_MASK 0x80 83 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A 84 #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D 85 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E 86 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71 87 #define ADT7470_REG_CFG_2 0x74 88 #define ADT7470_REG_ACOUSTICS12 0x75 89 #define ADT7470_REG_ACOUSTICS34 0x76 90 #define ADT7470_REG_DEVICE 0x3D 91 #define ADT7470_REG_VENDOR 0x3E 92 #define ADT7470_REG_REVISION 0x3F 93 #define ADT7470_REG_ALARM1_MASK 0x72 94 #define ADT7470_REG_ALARM2_MASK 0x73 95 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C 96 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D 97 #define ADT7470_REG_MAX_ADDR 0x81 98 99 #define ADT7470_TEMP_COUNT 10 100 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x)) 101 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2)) 102 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \ 103 ((x) * 2) + 1) 104 105 #define ADT7470_FAN_COUNT 4 106 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2)) 107 #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2)) 108 #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2)) 109 110 #define ADT7470_PWM_COUNT 4 111 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x)) 112 #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x)) 113 #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x)) 114 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x)) 115 #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2)) 116 #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \ 117 ((x) / 2)) 118 119 #define ALARM2(x) ((x) << 8) 120 121 #define ADT7470_VENDOR 0x41 122 #define ADT7470_DEVICE 0x70 123 /* datasheet only mentions a revision 2 */ 124 #define ADT7470_REVISION 0x02 125 126 /* "all temps" according to hwmon sysfs interface spec */ 127 #define ADT7470_PWM_ALL_TEMPS 0x3FF 128 129 /* How often do we reread sensors values? (In jiffies) */ 130 #define SENSOR_REFRESH_INTERVAL (5 * HZ) 131 132 /* How often do we reread sensor limit values? (In jiffies) */ 133 #define LIMIT_REFRESH_INTERVAL (60 * HZ) 134 135 /* Wait at least 200ms per sensor for 10 sensors */ 136 #define TEMP_COLLECTION_TIME 2000 137 138 /* auto update thing won't fire more than every 2s */ 139 #define AUTO_UPDATE_INTERVAL 2000 140 141 /* datasheet says to divide this number by the fan reading to get fan rpm */ 142 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x)) 143 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM 144 #define FAN_PERIOD_INVALID 65535 145 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID) 146 147 /* Config registers 1 and 2 include fields for selecting the PWM frequency */ 148 #define ADT7470_CFG_LF 0x40 149 #define ADT7470_FREQ_MASK 0x70 150 #define ADT7470_FREQ_SHIFT 4 151 152 struct adt7470_data { 153 struct i2c_client *client; 154 struct mutex lock; 155 char sensors_valid; 156 char limits_valid; 157 unsigned long sensors_last_updated; /* In jiffies */ 158 unsigned long limits_last_updated; /* In jiffies */ 159 160 int num_temp_sensors; /* -1 = probe */ 161 int temperatures_probed; 162 163 s8 temp[ADT7470_TEMP_COUNT]; 164 s8 temp_min[ADT7470_TEMP_COUNT]; 165 s8 temp_max[ADT7470_TEMP_COUNT]; 166 u16 fan[ADT7470_FAN_COUNT]; 167 u16 fan_min[ADT7470_FAN_COUNT]; 168 u16 fan_max[ADT7470_FAN_COUNT]; 169 u16 alarm; 170 u16 alarms_mask; 171 u8 force_pwm_max; 172 u8 pwm[ADT7470_PWM_COUNT]; 173 u8 pwm_max[ADT7470_PWM_COUNT]; 174 u8 pwm_automatic[ADT7470_PWM_COUNT]; 175 u8 pwm_min[ADT7470_PWM_COUNT]; 176 s8 pwm_tmin[ADT7470_PWM_COUNT]; 177 u8 pwm_auto_temp[ADT7470_PWM_COUNT]; 178 179 struct task_struct *auto_update; 180 unsigned int auto_update_interval; 181 }; 182 183 /* 184 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says 185 * that the low byte must be read before the high byte. 186 */ 187 static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg) 188 { 189 u16 foo; 190 foo = i2c_smbus_read_byte_data(client, reg); 191 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8); 192 return foo; 193 } 194 195 static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg, 196 u16 value) 197 { 198 return i2c_smbus_write_byte_data(client, reg, value & 0xFF) 199 || i2c_smbus_write_byte_data(client, reg + 1, value >> 8); 200 } 201 202 /* Probe for temperature sensors. Assumes lock is held */ 203 static int adt7470_read_temperatures(struct i2c_client *client, 204 struct adt7470_data *data) 205 { 206 unsigned long res; 207 int i; 208 u8 cfg, pwm[4], pwm_cfg[2]; 209 210 /* save pwm[1-4] config register */ 211 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0)); 212 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2)); 213 214 /* set manual pwm to whatever it is set to now */ 215 for (i = 0; i < ADT7470_FAN_COUNT; i++) 216 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i)); 217 218 /* put pwm in manual mode */ 219 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), 220 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK)); 221 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), 222 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK)); 223 224 /* write pwm control to whatever it was */ 225 for (i = 0; i < ADT7470_FAN_COUNT; i++) 226 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]); 227 228 /* start reading temperature sensors */ 229 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 230 cfg |= 0x80; 231 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); 232 233 /* Delay is 200ms * number of temp sensors. */ 234 res = msleep_interruptible((data->num_temp_sensors >= 0 ? 235 data->num_temp_sensors * 200 : 236 TEMP_COLLECTION_TIME)); 237 238 /* done reading temperature sensors */ 239 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 240 cfg &= ~0x80; 241 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); 242 243 /* restore pwm[1-4] config registers */ 244 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]); 245 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]); 246 247 if (res) { 248 pr_err("ha ha, interrupted\n"); 249 return -EAGAIN; 250 } 251 252 /* Only count fans if we have to */ 253 if (data->num_temp_sensors >= 0) 254 return 0; 255 256 for (i = 0; i < ADT7470_TEMP_COUNT; i++) { 257 data->temp[i] = i2c_smbus_read_byte_data(client, 258 ADT7470_TEMP_REG(i)); 259 if (data->temp[i]) 260 data->num_temp_sensors = i + 1; 261 } 262 data->temperatures_probed = 1; 263 return 0; 264 } 265 266 static int adt7470_update_thread(void *p) 267 { 268 struct i2c_client *client = p; 269 struct adt7470_data *data = i2c_get_clientdata(client); 270 271 while (!kthread_should_stop()) { 272 mutex_lock(&data->lock); 273 adt7470_read_temperatures(client, data); 274 mutex_unlock(&data->lock); 275 276 set_current_state(TASK_INTERRUPTIBLE); 277 if (kthread_should_stop()) 278 break; 279 280 schedule_timeout(msecs_to_jiffies(data->auto_update_interval)); 281 } 282 283 return 0; 284 } 285 286 static struct adt7470_data *adt7470_update_device(struct device *dev) 287 { 288 struct adt7470_data *data = dev_get_drvdata(dev); 289 struct i2c_client *client = data->client; 290 unsigned long local_jiffies = jiffies; 291 u8 cfg; 292 int i; 293 int need_sensors = 1; 294 int need_limits = 1; 295 296 /* 297 * Figure out if we need to update the shadow registers. 298 * Lockless means that we may occasionally report out of 299 * date data. 300 */ 301 if (time_before(local_jiffies, data->sensors_last_updated + 302 SENSOR_REFRESH_INTERVAL) && 303 data->sensors_valid) 304 need_sensors = 0; 305 306 if (time_before(local_jiffies, data->limits_last_updated + 307 LIMIT_REFRESH_INTERVAL) && 308 data->limits_valid) 309 need_limits = 0; 310 311 if (!need_sensors && !need_limits) 312 return data; 313 314 mutex_lock(&data->lock); 315 if (!need_sensors) 316 goto no_sensor_update; 317 318 if (!data->temperatures_probed) 319 adt7470_read_temperatures(client, data); 320 else 321 for (i = 0; i < ADT7470_TEMP_COUNT; i++) 322 data->temp[i] = i2c_smbus_read_byte_data(client, 323 ADT7470_TEMP_REG(i)); 324 325 for (i = 0; i < ADT7470_FAN_COUNT; i++) 326 data->fan[i] = adt7470_read_word_data(client, 327 ADT7470_REG_FAN(i)); 328 329 for (i = 0; i < ADT7470_PWM_COUNT; i++) { 330 int reg; 331 int reg_mask; 332 333 data->pwm[i] = i2c_smbus_read_byte_data(client, 334 ADT7470_REG_PWM(i)); 335 336 if (i % 2) 337 reg_mask = ADT7470_PWM2_AUTO_MASK; 338 else 339 reg_mask = ADT7470_PWM1_AUTO_MASK; 340 341 reg = ADT7470_REG_PWM_CFG(i); 342 if (i2c_smbus_read_byte_data(client, reg) & reg_mask) 343 data->pwm_automatic[i] = 1; 344 else 345 data->pwm_automatic[i] = 0; 346 347 reg = ADT7470_REG_PWM_AUTO_TEMP(i); 348 cfg = i2c_smbus_read_byte_data(client, reg); 349 if (!(i % 2)) 350 data->pwm_auto_temp[i] = cfg >> 4; 351 else 352 data->pwm_auto_temp[i] = cfg & 0xF; 353 } 354 355 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) & 356 ADT7470_FSPD_MASK) 357 data->force_pwm_max = 1; 358 else 359 data->force_pwm_max = 0; 360 361 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1); 362 if (data->alarm & ADT7470_OOL_ALARM) 363 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client, 364 ADT7470_REG_ALARM2)); 365 data->alarms_mask = adt7470_read_word_data(client, 366 ADT7470_REG_ALARM1_MASK); 367 368 data->sensors_last_updated = local_jiffies; 369 data->sensors_valid = 1; 370 371 no_sensor_update: 372 if (!need_limits) 373 goto out; 374 375 for (i = 0; i < ADT7470_TEMP_COUNT; i++) { 376 data->temp_min[i] = i2c_smbus_read_byte_data(client, 377 ADT7470_TEMP_MIN_REG(i)); 378 data->temp_max[i] = i2c_smbus_read_byte_data(client, 379 ADT7470_TEMP_MAX_REG(i)); 380 } 381 382 for (i = 0; i < ADT7470_FAN_COUNT; i++) { 383 data->fan_min[i] = adt7470_read_word_data(client, 384 ADT7470_REG_FAN_MIN(i)); 385 data->fan_max[i] = adt7470_read_word_data(client, 386 ADT7470_REG_FAN_MAX(i)); 387 } 388 389 for (i = 0; i < ADT7470_PWM_COUNT; i++) { 390 data->pwm_max[i] = i2c_smbus_read_byte_data(client, 391 ADT7470_REG_PWM_MAX(i)); 392 data->pwm_min[i] = i2c_smbus_read_byte_data(client, 393 ADT7470_REG_PWM_MIN(i)); 394 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client, 395 ADT7470_REG_PWM_TMIN(i)); 396 } 397 398 data->limits_last_updated = local_jiffies; 399 data->limits_valid = 1; 400 401 out: 402 mutex_unlock(&data->lock); 403 return data; 404 } 405 406 static ssize_t show_auto_update_interval(struct device *dev, 407 struct device_attribute *devattr, 408 char *buf) 409 { 410 struct adt7470_data *data = adt7470_update_device(dev); 411 return sprintf(buf, "%d\n", data->auto_update_interval); 412 } 413 414 static ssize_t set_auto_update_interval(struct device *dev, 415 struct device_attribute *devattr, 416 const char *buf, 417 size_t count) 418 { 419 struct adt7470_data *data = dev_get_drvdata(dev); 420 long temp; 421 422 if (kstrtol(buf, 10, &temp)) 423 return -EINVAL; 424 425 temp = clamp_val(temp, 0, 60000); 426 427 mutex_lock(&data->lock); 428 data->auto_update_interval = temp; 429 mutex_unlock(&data->lock); 430 431 return count; 432 } 433 434 static ssize_t show_num_temp_sensors(struct device *dev, 435 struct device_attribute *devattr, 436 char *buf) 437 { 438 struct adt7470_data *data = adt7470_update_device(dev); 439 return sprintf(buf, "%d\n", data->num_temp_sensors); 440 } 441 442 static ssize_t set_num_temp_sensors(struct device *dev, 443 struct device_attribute *devattr, 444 const char *buf, 445 size_t count) 446 { 447 struct adt7470_data *data = dev_get_drvdata(dev); 448 long temp; 449 450 if (kstrtol(buf, 10, &temp)) 451 return -EINVAL; 452 453 temp = clamp_val(temp, -1, 10); 454 455 mutex_lock(&data->lock); 456 data->num_temp_sensors = temp; 457 if (temp < 0) 458 data->temperatures_probed = 0; 459 mutex_unlock(&data->lock); 460 461 return count; 462 } 463 464 static ssize_t show_temp_min(struct device *dev, 465 struct device_attribute *devattr, 466 char *buf) 467 { 468 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 469 struct adt7470_data *data = adt7470_update_device(dev); 470 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]); 471 } 472 473 static ssize_t set_temp_min(struct device *dev, 474 struct device_attribute *devattr, 475 const char *buf, 476 size_t count) 477 { 478 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 479 struct adt7470_data *data = dev_get_drvdata(dev); 480 struct i2c_client *client = data->client; 481 long temp; 482 483 if (kstrtol(buf, 10, &temp)) 484 return -EINVAL; 485 486 temp = DIV_ROUND_CLOSEST(temp, 1000); 487 temp = clamp_val(temp, -128, 127); 488 489 mutex_lock(&data->lock); 490 data->temp_min[attr->index] = temp; 491 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index), 492 temp); 493 mutex_unlock(&data->lock); 494 495 return count; 496 } 497 498 static ssize_t show_temp_max(struct device *dev, 499 struct device_attribute *devattr, 500 char *buf) 501 { 502 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 503 struct adt7470_data *data = adt7470_update_device(dev); 504 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]); 505 } 506 507 static ssize_t set_temp_max(struct device *dev, 508 struct device_attribute *devattr, 509 const char *buf, 510 size_t count) 511 { 512 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 513 struct adt7470_data *data = dev_get_drvdata(dev); 514 struct i2c_client *client = data->client; 515 long temp; 516 517 if (kstrtol(buf, 10, &temp)) 518 return -EINVAL; 519 520 temp = DIV_ROUND_CLOSEST(temp, 1000); 521 temp = clamp_val(temp, -128, 127); 522 523 mutex_lock(&data->lock); 524 data->temp_max[attr->index] = temp; 525 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index), 526 temp); 527 mutex_unlock(&data->lock); 528 529 return count; 530 } 531 532 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, 533 char *buf) 534 { 535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 536 struct adt7470_data *data = adt7470_update_device(dev); 537 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]); 538 } 539 540 static ssize_t show_alarm_mask(struct device *dev, 541 struct device_attribute *devattr, 542 char *buf) 543 { 544 struct adt7470_data *data = adt7470_update_device(dev); 545 546 return sprintf(buf, "%x\n", data->alarms_mask); 547 } 548 549 static ssize_t set_alarm_mask(struct device *dev, 550 struct device_attribute *devattr, 551 const char *buf, 552 size_t count) 553 { 554 struct adt7470_data *data = dev_get_drvdata(dev); 555 long mask; 556 557 if (kstrtoul(buf, 0, &mask)) 558 return -EINVAL; 559 560 if (mask & ~0xffff) 561 return -EINVAL; 562 563 mutex_lock(&data->lock); 564 data->alarms_mask = mask; 565 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask); 566 mutex_unlock(&data->lock); 567 568 return count; 569 } 570 571 static ssize_t show_fan_max(struct device *dev, 572 struct device_attribute *devattr, 573 char *buf) 574 { 575 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 576 struct adt7470_data *data = adt7470_update_device(dev); 577 578 if (FAN_DATA_VALID(data->fan_max[attr->index])) 579 return sprintf(buf, "%d\n", 580 FAN_PERIOD_TO_RPM(data->fan_max[attr->index])); 581 else 582 return sprintf(buf, "0\n"); 583 } 584 585 static ssize_t set_fan_max(struct device *dev, 586 struct device_attribute *devattr, 587 const char *buf, size_t count) 588 { 589 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 590 struct adt7470_data *data = dev_get_drvdata(dev); 591 struct i2c_client *client = data->client; 592 long temp; 593 594 if (kstrtol(buf, 10, &temp) || !temp) 595 return -EINVAL; 596 597 temp = FAN_RPM_TO_PERIOD(temp); 598 temp = clamp_val(temp, 1, 65534); 599 600 mutex_lock(&data->lock); 601 data->fan_max[attr->index] = temp; 602 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp); 603 mutex_unlock(&data->lock); 604 605 return count; 606 } 607 608 static ssize_t show_fan_min(struct device *dev, 609 struct device_attribute *devattr, 610 char *buf) 611 { 612 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 613 struct adt7470_data *data = adt7470_update_device(dev); 614 615 if (FAN_DATA_VALID(data->fan_min[attr->index])) 616 return sprintf(buf, "%d\n", 617 FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); 618 else 619 return sprintf(buf, "0\n"); 620 } 621 622 static ssize_t set_fan_min(struct device *dev, 623 struct device_attribute *devattr, 624 const char *buf, size_t count) 625 { 626 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 627 struct adt7470_data *data = dev_get_drvdata(dev); 628 struct i2c_client *client = data->client; 629 long temp; 630 631 if (kstrtol(buf, 10, &temp) || !temp) 632 return -EINVAL; 633 634 temp = FAN_RPM_TO_PERIOD(temp); 635 temp = clamp_val(temp, 1, 65534); 636 637 mutex_lock(&data->lock); 638 data->fan_min[attr->index] = temp; 639 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp); 640 mutex_unlock(&data->lock); 641 642 return count; 643 } 644 645 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 646 char *buf) 647 { 648 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 649 struct adt7470_data *data = adt7470_update_device(dev); 650 651 if (FAN_DATA_VALID(data->fan[attr->index])) 652 return sprintf(buf, "%d\n", 653 FAN_PERIOD_TO_RPM(data->fan[attr->index])); 654 else 655 return sprintf(buf, "0\n"); 656 } 657 658 static ssize_t show_force_pwm_max(struct device *dev, 659 struct device_attribute *devattr, 660 char *buf) 661 { 662 struct adt7470_data *data = adt7470_update_device(dev); 663 return sprintf(buf, "%d\n", data->force_pwm_max); 664 } 665 666 static ssize_t set_force_pwm_max(struct device *dev, 667 struct device_attribute *devattr, 668 const char *buf, 669 size_t count) 670 { 671 struct adt7470_data *data = dev_get_drvdata(dev); 672 struct i2c_client *client = data->client; 673 long temp; 674 u8 reg; 675 676 if (kstrtol(buf, 10, &temp)) 677 return -EINVAL; 678 679 mutex_lock(&data->lock); 680 data->force_pwm_max = temp; 681 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 682 if (temp) 683 reg |= ADT7470_FSPD_MASK; 684 else 685 reg &= ~ADT7470_FSPD_MASK; 686 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg); 687 mutex_unlock(&data->lock); 688 689 return count; 690 } 691 692 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr, 693 char *buf) 694 { 695 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 696 struct adt7470_data *data = adt7470_update_device(dev); 697 return sprintf(buf, "%d\n", data->pwm[attr->index]); 698 } 699 700 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr, 701 const char *buf, size_t count) 702 { 703 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 704 struct adt7470_data *data = dev_get_drvdata(dev); 705 struct i2c_client *client = data->client; 706 long temp; 707 708 if (kstrtol(buf, 10, &temp)) 709 return -EINVAL; 710 711 temp = clamp_val(temp, 0, 255); 712 713 mutex_lock(&data->lock); 714 data->pwm[attr->index] = temp; 715 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp); 716 mutex_unlock(&data->lock); 717 718 return count; 719 } 720 721 /* These are the valid PWM frequencies to the nearest Hz */ 722 static const int adt7470_freq_map[] = { 723 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500 724 }; 725 726 static ssize_t show_pwm_freq(struct device *dev, 727 struct device_attribute *devattr, char *buf) 728 { 729 struct adt7470_data *data = adt7470_update_device(dev); 730 unsigned char cfg_reg_1; 731 unsigned char cfg_reg_2; 732 int index; 733 734 mutex_lock(&data->lock); 735 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG); 736 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2); 737 mutex_unlock(&data->lock); 738 739 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT; 740 if (!(cfg_reg_1 & ADT7470_CFG_LF)) 741 index += 8; 742 if (index >= ARRAY_SIZE(adt7470_freq_map)) 743 index = ARRAY_SIZE(adt7470_freq_map) - 1; 744 745 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]); 746 } 747 748 static ssize_t set_pwm_freq(struct device *dev, 749 struct device_attribute *devattr, 750 const char *buf, size_t count) 751 { 752 struct adt7470_data *data = dev_get_drvdata(dev); 753 struct i2c_client *client = data->client; 754 long freq; 755 int index; 756 int low_freq = ADT7470_CFG_LF; 757 unsigned char val; 758 759 if (kstrtol(buf, 10, &freq)) 760 return -EINVAL; 761 762 /* Round the user value given to the closest available frequency */ 763 index = find_closest(freq, adt7470_freq_map, 764 ARRAY_SIZE(adt7470_freq_map)); 765 766 if (index >= 8) { 767 index -= 8; 768 low_freq = 0; 769 } 770 771 mutex_lock(&data->lock); 772 /* Configuration Register 1 */ 773 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 774 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, 775 (val & ~ADT7470_CFG_LF) | low_freq); 776 /* Configuration Register 2 */ 777 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2); 778 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2, 779 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT)); 780 mutex_unlock(&data->lock); 781 782 return count; 783 } 784 785 static ssize_t show_pwm_max(struct device *dev, 786 struct device_attribute *devattr, 787 char *buf) 788 { 789 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 790 struct adt7470_data *data = adt7470_update_device(dev); 791 return sprintf(buf, "%d\n", data->pwm_max[attr->index]); 792 } 793 794 static ssize_t set_pwm_max(struct device *dev, 795 struct device_attribute *devattr, 796 const char *buf, 797 size_t count) 798 { 799 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 800 struct adt7470_data *data = dev_get_drvdata(dev); 801 struct i2c_client *client = data->client; 802 long temp; 803 804 if (kstrtol(buf, 10, &temp)) 805 return -EINVAL; 806 807 temp = clamp_val(temp, 0, 255); 808 809 mutex_lock(&data->lock); 810 data->pwm_max[attr->index] = temp; 811 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index), 812 temp); 813 mutex_unlock(&data->lock); 814 815 return count; 816 } 817 818 static ssize_t show_pwm_min(struct device *dev, 819 struct device_attribute *devattr, 820 char *buf) 821 { 822 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 823 struct adt7470_data *data = adt7470_update_device(dev); 824 return sprintf(buf, "%d\n", data->pwm_min[attr->index]); 825 } 826 827 static ssize_t set_pwm_min(struct device *dev, 828 struct device_attribute *devattr, 829 const char *buf, 830 size_t count) 831 { 832 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 833 struct adt7470_data *data = dev_get_drvdata(dev); 834 struct i2c_client *client = data->client; 835 long temp; 836 837 if (kstrtol(buf, 10, &temp)) 838 return -EINVAL; 839 840 temp = clamp_val(temp, 0, 255); 841 842 mutex_lock(&data->lock); 843 data->pwm_min[attr->index] = temp; 844 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index), 845 temp); 846 mutex_unlock(&data->lock); 847 848 return count; 849 } 850 851 static ssize_t show_pwm_tmax(struct device *dev, 852 struct device_attribute *devattr, 853 char *buf) 854 { 855 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 856 struct adt7470_data *data = adt7470_update_device(dev); 857 /* the datasheet says that tmax = tmin + 20C */ 858 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index])); 859 } 860 861 static ssize_t show_pwm_tmin(struct device *dev, 862 struct device_attribute *devattr, 863 char *buf) 864 { 865 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 866 struct adt7470_data *data = adt7470_update_device(dev); 867 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]); 868 } 869 870 static ssize_t set_pwm_tmin(struct device *dev, 871 struct device_attribute *devattr, 872 const char *buf, 873 size_t count) 874 { 875 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 876 struct adt7470_data *data = dev_get_drvdata(dev); 877 struct i2c_client *client = data->client; 878 long temp; 879 880 if (kstrtol(buf, 10, &temp)) 881 return -EINVAL; 882 883 temp = DIV_ROUND_CLOSEST(temp, 1000); 884 temp = clamp_val(temp, -128, 127); 885 886 mutex_lock(&data->lock); 887 data->pwm_tmin[attr->index] = temp; 888 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index), 889 temp); 890 mutex_unlock(&data->lock); 891 892 return count; 893 } 894 895 static ssize_t show_pwm_auto(struct device *dev, 896 struct device_attribute *devattr, 897 char *buf) 898 { 899 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 900 struct adt7470_data *data = adt7470_update_device(dev); 901 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]); 902 } 903 904 static ssize_t set_pwm_auto(struct device *dev, 905 struct device_attribute *devattr, 906 const char *buf, 907 size_t count) 908 { 909 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 910 struct adt7470_data *data = dev_get_drvdata(dev); 911 struct i2c_client *client = data->client; 912 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index); 913 int pwm_auto_reg_mask; 914 long temp; 915 u8 reg; 916 917 if (kstrtol(buf, 10, &temp)) 918 return -EINVAL; 919 920 if (attr->index % 2) 921 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK; 922 else 923 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK; 924 925 if (temp != 2 && temp != 1) 926 return -EINVAL; 927 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 if (temp) 933 reg |= pwm_auto_reg_mask; 934 else 935 reg &= ~pwm_auto_reg_mask; 936 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 937 mutex_unlock(&data->lock); 938 939 return count; 940 } 941 942 static ssize_t show_pwm_auto_temp(struct device *dev, 943 struct device_attribute *devattr, 944 char *buf) 945 { 946 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 947 struct adt7470_data *data = adt7470_update_device(dev); 948 u8 ctrl = data->pwm_auto_temp[attr->index]; 949 950 if (ctrl) 951 return sprintf(buf, "%d\n", 1 << (ctrl - 1)); 952 else 953 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS); 954 } 955 956 static int cvt_auto_temp(int input) 957 { 958 if (input == ADT7470_PWM_ALL_TEMPS) 959 return 0; 960 if (input < 1 || !is_power_of_2(input)) 961 return -EINVAL; 962 return ilog2(input) + 1; 963 } 964 965 static ssize_t set_pwm_auto_temp(struct device *dev, 966 struct device_attribute *devattr, 967 const char *buf, 968 size_t count) 969 { 970 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 971 struct adt7470_data *data = dev_get_drvdata(dev); 972 struct i2c_client *client = data->client; 973 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); 974 long temp; 975 u8 reg; 976 977 if (kstrtol(buf, 10, &temp)) 978 return -EINVAL; 979 980 temp = cvt_auto_temp(temp); 981 if (temp < 0) 982 return temp; 983 984 mutex_lock(&data->lock); 985 data->pwm_automatic[attr->index] = temp; 986 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 987 988 if (!(attr->index % 2)) { 989 reg &= 0xF; 990 reg |= (temp << 4) & 0xF0; 991 } else { 992 reg &= 0xF0; 993 reg |= temp & 0xF; 994 } 995 996 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 997 mutex_unlock(&data->lock); 998 999 return count; 1000 } 1001 1002 static ssize_t show_alarm(struct device *dev, 1003 struct device_attribute *devattr, 1004 char *buf) 1005 { 1006 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 1007 struct adt7470_data *data = adt7470_update_device(dev); 1008 1009 if (data->alarm & attr->index) 1010 return sprintf(buf, "1\n"); 1011 else 1012 return sprintf(buf, "0\n"); 1013 } 1014 1015 static DEVICE_ATTR(alarm_mask, S_IWUSR | S_IRUGO, show_alarm_mask, 1016 set_alarm_mask); 1017 static DEVICE_ATTR(num_temp_sensors, S_IWUSR | S_IRUGO, show_num_temp_sensors, 1018 set_num_temp_sensors); 1019 static DEVICE_ATTR(auto_update_interval, S_IWUSR | S_IRUGO, 1020 show_auto_update_interval, set_auto_update_interval); 1021 1022 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, 1023 set_temp_max, 0); 1024 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, 1025 set_temp_max, 1); 1026 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max, 1027 set_temp_max, 2); 1028 static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max, 1029 set_temp_max, 3); 1030 static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max, 1031 set_temp_max, 4); 1032 static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max, 1033 set_temp_max, 5); 1034 static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max, 1035 set_temp_max, 6); 1036 static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max, 1037 set_temp_max, 7); 1038 static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max, 1039 set_temp_max, 8); 1040 static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max, 1041 set_temp_max, 9); 1042 1043 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, 1044 set_temp_min, 0); 1045 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, 1046 set_temp_min, 1); 1047 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min, 1048 set_temp_min, 2); 1049 static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min, 1050 set_temp_min, 3); 1051 static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min, 1052 set_temp_min, 4); 1053 static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min, 1054 set_temp_min, 5); 1055 static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min, 1056 set_temp_min, 6); 1057 static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min, 1058 set_temp_min, 7); 1059 static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min, 1060 set_temp_min, 8); 1061 static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min, 1062 set_temp_min, 9); 1063 1064 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); 1065 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); 1066 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); 1067 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); 1068 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); 1069 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); 1070 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); 1071 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); 1072 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8); 1073 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9); 1074 1075 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 1076 ADT7470_R1T_ALARM); 1077 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 1078 ADT7470_R2T_ALARM); 1079 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1080 ADT7470_R3T_ALARM); 1081 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1082 ADT7470_R4T_ALARM); 1083 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 1084 ADT7470_R5T_ALARM); 1085 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 1086 ADT7470_R6T_ALARM); 1087 static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL, 1088 ADT7470_R7T_ALARM); 1089 static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL, 1090 ALARM2(ADT7470_R8T_ALARM)); 1091 static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL, 1092 ALARM2(ADT7470_R9T_ALARM)); 1093 static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL, 1094 ALARM2(ADT7470_R10T_ALARM)); 1095 1096 static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max, 1097 set_fan_max, 0); 1098 static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max, 1099 set_fan_max, 1); 1100 static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max, 1101 set_fan_max, 2); 1102 static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max, 1103 set_fan_max, 3); 1104 1105 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 1106 set_fan_min, 0); 1107 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 1108 set_fan_min, 1); 1109 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, 1110 set_fan_min, 2); 1111 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min, 1112 set_fan_min, 3); 1113 1114 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 1115 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 1116 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 1117 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 1118 1119 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 1120 ALARM2(ADT7470_FAN1_ALARM)); 1121 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1122 ALARM2(ADT7470_FAN2_ALARM)); 1123 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 1124 ALARM2(ADT7470_FAN3_ALARM)); 1125 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 1126 ALARM2(ADT7470_FAN4_ALARM)); 1127 1128 static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO, 1129 show_force_pwm_max, set_force_pwm_max, 0); 1130 1131 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0); 1132 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1); 1133 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2); 1134 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3); 1135 1136 static DEVICE_ATTR(pwm1_freq, S_IWUSR | S_IRUGO, show_pwm_freq, set_pwm_freq); 1137 1138 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 1139 show_pwm_min, set_pwm_min, 0); 1140 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO, 1141 show_pwm_min, set_pwm_min, 1); 1142 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO, 1143 show_pwm_min, set_pwm_min, 2); 1144 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO, 1145 show_pwm_min, set_pwm_min, 3); 1146 1147 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 1148 show_pwm_max, set_pwm_max, 0); 1149 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO, 1150 show_pwm_max, set_pwm_max, 1); 1151 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO, 1152 show_pwm_max, set_pwm_max, 2); 1153 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO, 1154 show_pwm_max, set_pwm_max, 3); 1155 1156 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 1157 show_pwm_tmin, set_pwm_tmin, 0); 1158 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO, 1159 show_pwm_tmin, set_pwm_tmin, 1); 1160 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO, 1161 show_pwm_tmin, set_pwm_tmin, 2); 1162 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO, 1163 show_pwm_tmin, set_pwm_tmin, 3); 1164 1165 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1166 NULL, 0); 1167 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1168 NULL, 1); 1169 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1170 NULL, 2); 1171 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1172 NULL, 3); 1173 1174 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1175 set_pwm_auto, 0); 1176 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1177 set_pwm_auto, 1); 1178 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1179 set_pwm_auto, 2); 1180 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1181 set_pwm_auto, 3); 1182 1183 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO, 1184 show_pwm_auto_temp, set_pwm_auto_temp, 0); 1185 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO, 1186 show_pwm_auto_temp, set_pwm_auto_temp, 1); 1187 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO, 1188 show_pwm_auto_temp, set_pwm_auto_temp, 2); 1189 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO, 1190 show_pwm_auto_temp, set_pwm_auto_temp, 3); 1191 1192 static struct attribute *adt7470_attrs[] = { 1193 &dev_attr_alarm_mask.attr, 1194 &dev_attr_num_temp_sensors.attr, 1195 &dev_attr_auto_update_interval.attr, 1196 &sensor_dev_attr_temp1_max.dev_attr.attr, 1197 &sensor_dev_attr_temp2_max.dev_attr.attr, 1198 &sensor_dev_attr_temp3_max.dev_attr.attr, 1199 &sensor_dev_attr_temp4_max.dev_attr.attr, 1200 &sensor_dev_attr_temp5_max.dev_attr.attr, 1201 &sensor_dev_attr_temp6_max.dev_attr.attr, 1202 &sensor_dev_attr_temp7_max.dev_attr.attr, 1203 &sensor_dev_attr_temp8_max.dev_attr.attr, 1204 &sensor_dev_attr_temp9_max.dev_attr.attr, 1205 &sensor_dev_attr_temp10_max.dev_attr.attr, 1206 &sensor_dev_attr_temp1_min.dev_attr.attr, 1207 &sensor_dev_attr_temp2_min.dev_attr.attr, 1208 &sensor_dev_attr_temp3_min.dev_attr.attr, 1209 &sensor_dev_attr_temp4_min.dev_attr.attr, 1210 &sensor_dev_attr_temp5_min.dev_attr.attr, 1211 &sensor_dev_attr_temp6_min.dev_attr.attr, 1212 &sensor_dev_attr_temp7_min.dev_attr.attr, 1213 &sensor_dev_attr_temp8_min.dev_attr.attr, 1214 &sensor_dev_attr_temp9_min.dev_attr.attr, 1215 &sensor_dev_attr_temp10_min.dev_attr.attr, 1216 &sensor_dev_attr_temp1_input.dev_attr.attr, 1217 &sensor_dev_attr_temp2_input.dev_attr.attr, 1218 &sensor_dev_attr_temp3_input.dev_attr.attr, 1219 &sensor_dev_attr_temp4_input.dev_attr.attr, 1220 &sensor_dev_attr_temp5_input.dev_attr.attr, 1221 &sensor_dev_attr_temp6_input.dev_attr.attr, 1222 &sensor_dev_attr_temp7_input.dev_attr.attr, 1223 &sensor_dev_attr_temp8_input.dev_attr.attr, 1224 &sensor_dev_attr_temp9_input.dev_attr.attr, 1225 &sensor_dev_attr_temp10_input.dev_attr.attr, 1226 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1227 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1228 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1229 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 1230 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 1231 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 1232 &sensor_dev_attr_temp7_alarm.dev_attr.attr, 1233 &sensor_dev_attr_temp8_alarm.dev_attr.attr, 1234 &sensor_dev_attr_temp9_alarm.dev_attr.attr, 1235 &sensor_dev_attr_temp10_alarm.dev_attr.attr, 1236 &sensor_dev_attr_fan1_max.dev_attr.attr, 1237 &sensor_dev_attr_fan2_max.dev_attr.attr, 1238 &sensor_dev_attr_fan3_max.dev_attr.attr, 1239 &sensor_dev_attr_fan4_max.dev_attr.attr, 1240 &sensor_dev_attr_fan1_min.dev_attr.attr, 1241 &sensor_dev_attr_fan2_min.dev_attr.attr, 1242 &sensor_dev_attr_fan3_min.dev_attr.attr, 1243 &sensor_dev_attr_fan4_min.dev_attr.attr, 1244 &sensor_dev_attr_fan1_input.dev_attr.attr, 1245 &sensor_dev_attr_fan2_input.dev_attr.attr, 1246 &sensor_dev_attr_fan3_input.dev_attr.attr, 1247 &sensor_dev_attr_fan4_input.dev_attr.attr, 1248 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1249 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1250 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1251 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1252 &sensor_dev_attr_force_pwm_max.dev_attr.attr, 1253 &sensor_dev_attr_pwm1.dev_attr.attr, 1254 &dev_attr_pwm1_freq.attr, 1255 &sensor_dev_attr_pwm2.dev_attr.attr, 1256 &sensor_dev_attr_pwm3.dev_attr.attr, 1257 &sensor_dev_attr_pwm4.dev_attr.attr, 1258 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1259 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1260 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1261 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr, 1262 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1263 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1264 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1265 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr, 1266 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1267 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1268 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1269 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr, 1270 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1271 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1272 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1273 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr, 1274 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1275 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1276 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1277 &sensor_dev_attr_pwm4_enable.dev_attr.attr, 1278 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1279 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1280 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1281 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr, 1282 NULL 1283 }; 1284 1285 ATTRIBUTE_GROUPS(adt7470); 1286 1287 /* Return 0 if detection is successful, -ENODEV otherwise */ 1288 static int adt7470_detect(struct i2c_client *client, 1289 struct i2c_board_info *info) 1290 { 1291 struct i2c_adapter *adapter = client->adapter; 1292 int vendor, device, revision; 1293 1294 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1295 return -ENODEV; 1296 1297 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR); 1298 if (vendor != ADT7470_VENDOR) 1299 return -ENODEV; 1300 1301 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE); 1302 if (device != ADT7470_DEVICE) 1303 return -ENODEV; 1304 1305 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION); 1306 if (revision != ADT7470_REVISION) 1307 return -ENODEV; 1308 1309 strlcpy(info->type, "adt7470", I2C_NAME_SIZE); 1310 1311 return 0; 1312 } 1313 1314 static void adt7470_init_client(struct i2c_client *client) 1315 { 1316 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 1317 1318 if (reg < 0) { 1319 dev_err(&client->dev, "cannot read configuration register\n"); 1320 } else { 1321 /* start monitoring (and do a self-test) */ 1322 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3); 1323 } 1324 } 1325 1326 static int adt7470_probe(struct i2c_client *client, 1327 const struct i2c_device_id *id) 1328 { 1329 struct device *dev = &client->dev; 1330 struct adt7470_data *data; 1331 struct device *hwmon_dev; 1332 1333 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL); 1334 if (!data) 1335 return -ENOMEM; 1336 1337 data->num_temp_sensors = -1; 1338 data->auto_update_interval = AUTO_UPDATE_INTERVAL; 1339 1340 i2c_set_clientdata(client, data); 1341 data->client = client; 1342 mutex_init(&data->lock); 1343 1344 dev_info(&client->dev, "%s chip found\n", client->name); 1345 1346 /* Initialize the ADT7470 chip */ 1347 adt7470_init_client(client); 1348 1349 /* Register sysfs hooks */ 1350 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1351 data, 1352 adt7470_groups); 1353 1354 if (IS_ERR(hwmon_dev)) 1355 return PTR_ERR(hwmon_dev); 1356 1357 data->auto_update = kthread_run(adt7470_update_thread, client, "%s", 1358 dev_name(hwmon_dev)); 1359 if (IS_ERR(data->auto_update)) { 1360 return PTR_ERR(data->auto_update); 1361 } 1362 1363 return 0; 1364 } 1365 1366 static int adt7470_remove(struct i2c_client *client) 1367 { 1368 struct adt7470_data *data = i2c_get_clientdata(client); 1369 1370 kthread_stop(data->auto_update); 1371 return 0; 1372 } 1373 1374 static const struct i2c_device_id adt7470_id[] = { 1375 { "adt7470", 0 }, 1376 { } 1377 }; 1378 MODULE_DEVICE_TABLE(i2c, adt7470_id); 1379 1380 static struct i2c_driver adt7470_driver = { 1381 .class = I2C_CLASS_HWMON, 1382 .driver = { 1383 .name = "adt7470", 1384 }, 1385 .probe = adt7470_probe, 1386 .remove = adt7470_remove, 1387 .id_table = adt7470_id, 1388 .detect = adt7470_detect, 1389 .address_list = normal_i2c, 1390 }; 1391 1392 module_i2c_driver(adt7470_driver); 1393 1394 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); 1395 MODULE_DESCRIPTION("ADT7470 driver"); 1396 MODULE_LICENSE("GPL"); 1397