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 auto_update_interval_show(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 auto_update_interval_store(struct device *dev, 415 struct device_attribute *devattr, 416 const char *buf, size_t count) 417 { 418 struct adt7470_data *data = dev_get_drvdata(dev); 419 long temp; 420 421 if (kstrtol(buf, 10, &temp)) 422 return -EINVAL; 423 424 temp = clamp_val(temp, 0, 60000); 425 426 mutex_lock(&data->lock); 427 data->auto_update_interval = temp; 428 mutex_unlock(&data->lock); 429 430 return count; 431 } 432 433 static ssize_t num_temp_sensors_show(struct device *dev, 434 struct device_attribute *devattr, 435 char *buf) 436 { 437 struct adt7470_data *data = adt7470_update_device(dev); 438 return sprintf(buf, "%d\n", data->num_temp_sensors); 439 } 440 441 static ssize_t num_temp_sensors_store(struct device *dev, 442 struct device_attribute *devattr, 443 const char *buf, size_t count) 444 { 445 struct adt7470_data *data = dev_get_drvdata(dev); 446 long temp; 447 448 if (kstrtol(buf, 10, &temp)) 449 return -EINVAL; 450 451 temp = clamp_val(temp, -1, 10); 452 453 mutex_lock(&data->lock); 454 data->num_temp_sensors = temp; 455 if (temp < 0) 456 data->temperatures_probed = 0; 457 mutex_unlock(&data->lock); 458 459 return count; 460 } 461 462 static ssize_t show_temp_min(struct device *dev, 463 struct device_attribute *devattr, 464 char *buf) 465 { 466 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 467 struct adt7470_data *data = adt7470_update_device(dev); 468 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]); 469 } 470 471 static ssize_t set_temp_min(struct device *dev, 472 struct device_attribute *devattr, 473 const char *buf, 474 size_t count) 475 { 476 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 477 struct adt7470_data *data = dev_get_drvdata(dev); 478 struct i2c_client *client = data->client; 479 long temp; 480 481 if (kstrtol(buf, 10, &temp)) 482 return -EINVAL; 483 484 temp = clamp_val(temp, -128000, 127000); 485 temp = DIV_ROUND_CLOSEST(temp, 1000); 486 487 mutex_lock(&data->lock); 488 data->temp_min[attr->index] = temp; 489 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index), 490 temp); 491 mutex_unlock(&data->lock); 492 493 return count; 494 } 495 496 static ssize_t show_temp_max(struct device *dev, 497 struct device_attribute *devattr, 498 char *buf) 499 { 500 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 501 struct adt7470_data *data = adt7470_update_device(dev); 502 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]); 503 } 504 505 static ssize_t set_temp_max(struct device *dev, 506 struct device_attribute *devattr, 507 const char *buf, 508 size_t count) 509 { 510 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 511 struct adt7470_data *data = dev_get_drvdata(dev); 512 struct i2c_client *client = data->client; 513 long temp; 514 515 if (kstrtol(buf, 10, &temp)) 516 return -EINVAL; 517 518 temp = clamp_val(temp, -128000, 127000); 519 temp = DIV_ROUND_CLOSEST(temp, 1000); 520 521 mutex_lock(&data->lock); 522 data->temp_max[attr->index] = temp; 523 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index), 524 temp); 525 mutex_unlock(&data->lock); 526 527 return count; 528 } 529 530 static ssize_t show_temp(struct device *dev, 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[attr->index]); 536 } 537 538 static ssize_t alarm_mask_show(struct device *dev, 539 struct device_attribute *devattr, 540 char *buf) 541 { 542 struct adt7470_data *data = adt7470_update_device(dev); 543 544 return sprintf(buf, "%x\n", data->alarms_mask); 545 } 546 547 static ssize_t alarm_mask_store(struct device *dev, 548 struct device_attribute *devattr, 549 const char *buf, size_t count) 550 { 551 struct adt7470_data *data = dev_get_drvdata(dev); 552 long mask; 553 554 if (kstrtoul(buf, 0, &mask)) 555 return -EINVAL; 556 557 if (mask & ~0xffff) 558 return -EINVAL; 559 560 mutex_lock(&data->lock); 561 data->alarms_mask = mask; 562 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask); 563 mutex_unlock(&data->lock); 564 565 return count; 566 } 567 568 static ssize_t show_fan_max(struct device *dev, 569 struct device_attribute *devattr, 570 char *buf) 571 { 572 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 573 struct adt7470_data *data = adt7470_update_device(dev); 574 575 if (FAN_DATA_VALID(data->fan_max[attr->index])) 576 return sprintf(buf, "%d\n", 577 FAN_PERIOD_TO_RPM(data->fan_max[attr->index])); 578 else 579 return sprintf(buf, "0\n"); 580 } 581 582 static ssize_t set_fan_max(struct device *dev, 583 struct device_attribute *devattr, 584 const char *buf, size_t count) 585 { 586 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 587 struct adt7470_data *data = dev_get_drvdata(dev); 588 struct i2c_client *client = data->client; 589 long temp; 590 591 if (kstrtol(buf, 10, &temp) || !temp) 592 return -EINVAL; 593 594 temp = FAN_RPM_TO_PERIOD(temp); 595 temp = clamp_val(temp, 1, 65534); 596 597 mutex_lock(&data->lock); 598 data->fan_max[attr->index] = temp; 599 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp); 600 mutex_unlock(&data->lock); 601 602 return count; 603 } 604 605 static ssize_t show_fan_min(struct device *dev, 606 struct device_attribute *devattr, 607 char *buf) 608 { 609 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 610 struct adt7470_data *data = adt7470_update_device(dev); 611 612 if (FAN_DATA_VALID(data->fan_min[attr->index])) 613 return sprintf(buf, "%d\n", 614 FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); 615 else 616 return sprintf(buf, "0\n"); 617 } 618 619 static ssize_t set_fan_min(struct device *dev, 620 struct device_attribute *devattr, 621 const char *buf, size_t count) 622 { 623 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 624 struct adt7470_data *data = dev_get_drvdata(dev); 625 struct i2c_client *client = data->client; 626 long temp; 627 628 if (kstrtol(buf, 10, &temp) || !temp) 629 return -EINVAL; 630 631 temp = FAN_RPM_TO_PERIOD(temp); 632 temp = clamp_val(temp, 1, 65534); 633 634 mutex_lock(&data->lock); 635 data->fan_min[attr->index] = temp; 636 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp); 637 mutex_unlock(&data->lock); 638 639 return count; 640 } 641 642 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 643 char *buf) 644 { 645 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 646 struct adt7470_data *data = adt7470_update_device(dev); 647 648 if (FAN_DATA_VALID(data->fan[attr->index])) 649 return sprintf(buf, "%d\n", 650 FAN_PERIOD_TO_RPM(data->fan[attr->index])); 651 else 652 return sprintf(buf, "0\n"); 653 } 654 655 static ssize_t show_force_pwm_max(struct device *dev, 656 struct device_attribute *devattr, 657 char *buf) 658 { 659 struct adt7470_data *data = adt7470_update_device(dev); 660 return sprintf(buf, "%d\n", data->force_pwm_max); 661 } 662 663 static ssize_t set_force_pwm_max(struct device *dev, 664 struct device_attribute *devattr, 665 const char *buf, 666 size_t count) 667 { 668 struct adt7470_data *data = dev_get_drvdata(dev); 669 struct i2c_client *client = data->client; 670 long temp; 671 u8 reg; 672 673 if (kstrtol(buf, 10, &temp)) 674 return -EINVAL; 675 676 mutex_lock(&data->lock); 677 data->force_pwm_max = temp; 678 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 679 if (temp) 680 reg |= ADT7470_FSPD_MASK; 681 else 682 reg &= ~ADT7470_FSPD_MASK; 683 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg); 684 mutex_unlock(&data->lock); 685 686 return count; 687 } 688 689 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr, 690 char *buf) 691 { 692 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 693 struct adt7470_data *data = adt7470_update_device(dev); 694 return sprintf(buf, "%d\n", data->pwm[attr->index]); 695 } 696 697 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr, 698 const char *buf, size_t count) 699 { 700 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 701 struct adt7470_data *data = dev_get_drvdata(dev); 702 struct i2c_client *client = data->client; 703 long temp; 704 705 if (kstrtol(buf, 10, &temp)) 706 return -EINVAL; 707 708 temp = clamp_val(temp, 0, 255); 709 710 mutex_lock(&data->lock); 711 data->pwm[attr->index] = temp; 712 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp); 713 mutex_unlock(&data->lock); 714 715 return count; 716 } 717 718 /* These are the valid PWM frequencies to the nearest Hz */ 719 static const int adt7470_freq_map[] = { 720 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500 721 }; 722 723 static ssize_t pwm1_freq_show(struct device *dev, 724 struct device_attribute *devattr, char *buf) 725 { 726 struct adt7470_data *data = adt7470_update_device(dev); 727 unsigned char cfg_reg_1; 728 unsigned char cfg_reg_2; 729 int index; 730 731 mutex_lock(&data->lock); 732 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG); 733 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2); 734 mutex_unlock(&data->lock); 735 736 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT; 737 if (!(cfg_reg_1 & ADT7470_CFG_LF)) 738 index += 8; 739 if (index >= ARRAY_SIZE(adt7470_freq_map)) 740 index = ARRAY_SIZE(adt7470_freq_map) - 1; 741 742 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]); 743 } 744 745 static ssize_t pwm1_freq_store(struct device *dev, 746 struct device_attribute *devattr, 747 const char *buf, size_t count) 748 { 749 struct adt7470_data *data = dev_get_drvdata(dev); 750 struct i2c_client *client = data->client; 751 long freq; 752 int index; 753 int low_freq = ADT7470_CFG_LF; 754 unsigned char val; 755 756 if (kstrtol(buf, 10, &freq)) 757 return -EINVAL; 758 759 /* Round the user value given to the closest available frequency */ 760 index = find_closest(freq, adt7470_freq_map, 761 ARRAY_SIZE(adt7470_freq_map)); 762 763 if (index >= 8) { 764 index -= 8; 765 low_freq = 0; 766 } 767 768 mutex_lock(&data->lock); 769 /* Configuration Register 1 */ 770 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 771 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, 772 (val & ~ADT7470_CFG_LF) | low_freq); 773 /* Configuration Register 2 */ 774 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2); 775 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2, 776 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT)); 777 mutex_unlock(&data->lock); 778 779 return count; 780 } 781 782 static ssize_t show_pwm_max(struct device *dev, 783 struct device_attribute *devattr, 784 char *buf) 785 { 786 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 787 struct adt7470_data *data = adt7470_update_device(dev); 788 return sprintf(buf, "%d\n", data->pwm_max[attr->index]); 789 } 790 791 static ssize_t set_pwm_max(struct device *dev, 792 struct device_attribute *devattr, 793 const char *buf, 794 size_t count) 795 { 796 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 797 struct adt7470_data *data = dev_get_drvdata(dev); 798 struct i2c_client *client = data->client; 799 long temp; 800 801 if (kstrtol(buf, 10, &temp)) 802 return -EINVAL; 803 804 temp = clamp_val(temp, 0, 255); 805 806 mutex_lock(&data->lock); 807 data->pwm_max[attr->index] = temp; 808 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index), 809 temp); 810 mutex_unlock(&data->lock); 811 812 return count; 813 } 814 815 static ssize_t show_pwm_min(struct device *dev, 816 struct device_attribute *devattr, 817 char *buf) 818 { 819 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 820 struct adt7470_data *data = adt7470_update_device(dev); 821 return sprintf(buf, "%d\n", data->pwm_min[attr->index]); 822 } 823 824 static ssize_t set_pwm_min(struct device *dev, 825 struct device_attribute *devattr, 826 const char *buf, 827 size_t count) 828 { 829 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 830 struct adt7470_data *data = dev_get_drvdata(dev); 831 struct i2c_client *client = data->client; 832 long temp; 833 834 if (kstrtol(buf, 10, &temp)) 835 return -EINVAL; 836 837 temp = clamp_val(temp, 0, 255); 838 839 mutex_lock(&data->lock); 840 data->pwm_min[attr->index] = temp; 841 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index), 842 temp); 843 mutex_unlock(&data->lock); 844 845 return count; 846 } 847 848 static ssize_t show_pwm_tmax(struct device *dev, 849 struct device_attribute *devattr, 850 char *buf) 851 { 852 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 853 struct adt7470_data *data = adt7470_update_device(dev); 854 /* the datasheet says that tmax = tmin + 20C */ 855 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index])); 856 } 857 858 static ssize_t show_pwm_tmin(struct device *dev, 859 struct device_attribute *devattr, 860 char *buf) 861 { 862 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 863 struct adt7470_data *data = adt7470_update_device(dev); 864 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]); 865 } 866 867 static ssize_t set_pwm_tmin(struct device *dev, 868 struct device_attribute *devattr, 869 const char *buf, 870 size_t count) 871 { 872 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 873 struct adt7470_data *data = dev_get_drvdata(dev); 874 struct i2c_client *client = data->client; 875 long temp; 876 877 if (kstrtol(buf, 10, &temp)) 878 return -EINVAL; 879 880 temp = clamp_val(temp, -128000, 127000); 881 temp = DIV_ROUND_CLOSEST(temp, 1000); 882 883 mutex_lock(&data->lock); 884 data->pwm_tmin[attr->index] = temp; 885 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index), 886 temp); 887 mutex_unlock(&data->lock); 888 889 return count; 890 } 891 892 static ssize_t show_pwm_auto(struct device *dev, 893 struct device_attribute *devattr, 894 char *buf) 895 { 896 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 897 struct adt7470_data *data = adt7470_update_device(dev); 898 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]); 899 } 900 901 static ssize_t set_pwm_auto(struct device *dev, 902 struct device_attribute *devattr, 903 const char *buf, 904 size_t count) 905 { 906 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 907 struct adt7470_data *data = dev_get_drvdata(dev); 908 struct i2c_client *client = data->client; 909 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index); 910 int pwm_auto_reg_mask; 911 long temp; 912 u8 reg; 913 914 if (kstrtol(buf, 10, &temp)) 915 return -EINVAL; 916 917 if (attr->index % 2) 918 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK; 919 else 920 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK; 921 922 if (temp != 2 && temp != 1) 923 return -EINVAL; 924 temp--; 925 926 mutex_lock(&data->lock); 927 data->pwm_automatic[attr->index] = temp; 928 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 929 if (temp) 930 reg |= pwm_auto_reg_mask; 931 else 932 reg &= ~pwm_auto_reg_mask; 933 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 934 mutex_unlock(&data->lock); 935 936 return count; 937 } 938 939 static ssize_t show_pwm_auto_temp(struct device *dev, 940 struct device_attribute *devattr, 941 char *buf) 942 { 943 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 944 struct adt7470_data *data = adt7470_update_device(dev); 945 u8 ctrl = data->pwm_auto_temp[attr->index]; 946 947 if (ctrl) 948 return sprintf(buf, "%d\n", 1 << (ctrl - 1)); 949 else 950 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS); 951 } 952 953 static int cvt_auto_temp(int input) 954 { 955 if (input == ADT7470_PWM_ALL_TEMPS) 956 return 0; 957 if (input < 1 || !is_power_of_2(input)) 958 return -EINVAL; 959 return ilog2(input) + 1; 960 } 961 962 static ssize_t set_pwm_auto_temp(struct device *dev, 963 struct device_attribute *devattr, 964 const char *buf, 965 size_t count) 966 { 967 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 968 struct adt7470_data *data = dev_get_drvdata(dev); 969 struct i2c_client *client = data->client; 970 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); 971 long temp; 972 u8 reg; 973 974 if (kstrtol(buf, 10, &temp)) 975 return -EINVAL; 976 977 temp = cvt_auto_temp(temp); 978 if (temp < 0) 979 return temp; 980 981 mutex_lock(&data->lock); 982 data->pwm_automatic[attr->index] = temp; 983 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 984 985 if (!(attr->index % 2)) { 986 reg &= 0xF; 987 reg |= (temp << 4) & 0xF0; 988 } else { 989 reg &= 0xF0; 990 reg |= temp & 0xF; 991 } 992 993 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 994 mutex_unlock(&data->lock); 995 996 return count; 997 } 998 999 static ssize_t show_alarm(struct device *dev, 1000 struct device_attribute *devattr, 1001 char *buf) 1002 { 1003 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 1004 struct adt7470_data *data = adt7470_update_device(dev); 1005 1006 if (data->alarm & attr->index) 1007 return sprintf(buf, "1\n"); 1008 else 1009 return sprintf(buf, "0\n"); 1010 } 1011 1012 static DEVICE_ATTR_RW(alarm_mask); 1013 static DEVICE_ATTR_RW(num_temp_sensors); 1014 static DEVICE_ATTR_RW(auto_update_interval); 1015 1016 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, 1017 set_temp_max, 0); 1018 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, 1019 set_temp_max, 1); 1020 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max, 1021 set_temp_max, 2); 1022 static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max, 1023 set_temp_max, 3); 1024 static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max, 1025 set_temp_max, 4); 1026 static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max, 1027 set_temp_max, 5); 1028 static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max, 1029 set_temp_max, 6); 1030 static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max, 1031 set_temp_max, 7); 1032 static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max, 1033 set_temp_max, 8); 1034 static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max, 1035 set_temp_max, 9); 1036 1037 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, 1038 set_temp_min, 0); 1039 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, 1040 set_temp_min, 1); 1041 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min, 1042 set_temp_min, 2); 1043 static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min, 1044 set_temp_min, 3); 1045 static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min, 1046 set_temp_min, 4); 1047 static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min, 1048 set_temp_min, 5); 1049 static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min, 1050 set_temp_min, 6); 1051 static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min, 1052 set_temp_min, 7); 1053 static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min, 1054 set_temp_min, 8); 1055 static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min, 1056 set_temp_min, 9); 1057 1058 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); 1059 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); 1060 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); 1061 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); 1062 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4); 1063 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5); 1064 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6); 1065 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7); 1066 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8); 1067 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9); 1068 1069 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 1070 ADT7470_R1T_ALARM); 1071 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 1072 ADT7470_R2T_ALARM); 1073 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1074 ADT7470_R3T_ALARM); 1075 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL, 1076 ADT7470_R4T_ALARM); 1077 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL, 1078 ADT7470_R5T_ALARM); 1079 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL, 1080 ADT7470_R6T_ALARM); 1081 static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL, 1082 ADT7470_R7T_ALARM); 1083 static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL, 1084 ALARM2(ADT7470_R8T_ALARM)); 1085 static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL, 1086 ALARM2(ADT7470_R9T_ALARM)); 1087 static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL, 1088 ALARM2(ADT7470_R10T_ALARM)); 1089 1090 static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max, 1091 set_fan_max, 0); 1092 static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max, 1093 set_fan_max, 1); 1094 static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max, 1095 set_fan_max, 2); 1096 static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max, 1097 set_fan_max, 3); 1098 1099 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 1100 set_fan_min, 0); 1101 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 1102 set_fan_min, 1); 1103 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, 1104 set_fan_min, 2); 1105 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min, 1106 set_fan_min, 3); 1107 1108 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 1109 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); 1110 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); 1111 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); 1112 1113 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 1114 ALARM2(ADT7470_FAN1_ALARM)); 1115 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1116 ALARM2(ADT7470_FAN2_ALARM)); 1117 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 1118 ALARM2(ADT7470_FAN3_ALARM)); 1119 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 1120 ALARM2(ADT7470_FAN4_ALARM)); 1121 1122 static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO, 1123 show_force_pwm_max, set_force_pwm_max, 0); 1124 1125 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0); 1126 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1); 1127 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2); 1128 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3); 1129 1130 static DEVICE_ATTR_RW(pwm1_freq); 1131 1132 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 1133 show_pwm_min, set_pwm_min, 0); 1134 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO, 1135 show_pwm_min, set_pwm_min, 1); 1136 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO, 1137 show_pwm_min, set_pwm_min, 2); 1138 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO, 1139 show_pwm_min, set_pwm_min, 3); 1140 1141 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 1142 show_pwm_max, set_pwm_max, 0); 1143 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO, 1144 show_pwm_max, set_pwm_max, 1); 1145 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO, 1146 show_pwm_max, set_pwm_max, 2); 1147 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO, 1148 show_pwm_max, set_pwm_max, 3); 1149 1150 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 1151 show_pwm_tmin, set_pwm_tmin, 0); 1152 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO, 1153 show_pwm_tmin, set_pwm_tmin, 1); 1154 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO, 1155 show_pwm_tmin, set_pwm_tmin, 2); 1156 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO, 1157 show_pwm_tmin, set_pwm_tmin, 3); 1158 1159 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1160 NULL, 0); 1161 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1162 NULL, 1); 1163 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1164 NULL, 2); 1165 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax, 1166 NULL, 3); 1167 1168 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1169 set_pwm_auto, 0); 1170 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1171 set_pwm_auto, 1); 1172 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1173 set_pwm_auto, 2); 1174 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto, 1175 set_pwm_auto, 3); 1176 1177 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO, 1178 show_pwm_auto_temp, set_pwm_auto_temp, 0); 1179 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO, 1180 show_pwm_auto_temp, set_pwm_auto_temp, 1); 1181 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO, 1182 show_pwm_auto_temp, set_pwm_auto_temp, 2); 1183 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO, 1184 show_pwm_auto_temp, set_pwm_auto_temp, 3); 1185 1186 static struct attribute *adt7470_attrs[] = { 1187 &dev_attr_alarm_mask.attr, 1188 &dev_attr_num_temp_sensors.attr, 1189 &dev_attr_auto_update_interval.attr, 1190 &sensor_dev_attr_temp1_max.dev_attr.attr, 1191 &sensor_dev_attr_temp2_max.dev_attr.attr, 1192 &sensor_dev_attr_temp3_max.dev_attr.attr, 1193 &sensor_dev_attr_temp4_max.dev_attr.attr, 1194 &sensor_dev_attr_temp5_max.dev_attr.attr, 1195 &sensor_dev_attr_temp6_max.dev_attr.attr, 1196 &sensor_dev_attr_temp7_max.dev_attr.attr, 1197 &sensor_dev_attr_temp8_max.dev_attr.attr, 1198 &sensor_dev_attr_temp9_max.dev_attr.attr, 1199 &sensor_dev_attr_temp10_max.dev_attr.attr, 1200 &sensor_dev_attr_temp1_min.dev_attr.attr, 1201 &sensor_dev_attr_temp2_min.dev_attr.attr, 1202 &sensor_dev_attr_temp3_min.dev_attr.attr, 1203 &sensor_dev_attr_temp4_min.dev_attr.attr, 1204 &sensor_dev_attr_temp5_min.dev_attr.attr, 1205 &sensor_dev_attr_temp6_min.dev_attr.attr, 1206 &sensor_dev_attr_temp7_min.dev_attr.attr, 1207 &sensor_dev_attr_temp8_min.dev_attr.attr, 1208 &sensor_dev_attr_temp9_min.dev_attr.attr, 1209 &sensor_dev_attr_temp10_min.dev_attr.attr, 1210 &sensor_dev_attr_temp1_input.dev_attr.attr, 1211 &sensor_dev_attr_temp2_input.dev_attr.attr, 1212 &sensor_dev_attr_temp3_input.dev_attr.attr, 1213 &sensor_dev_attr_temp4_input.dev_attr.attr, 1214 &sensor_dev_attr_temp5_input.dev_attr.attr, 1215 &sensor_dev_attr_temp6_input.dev_attr.attr, 1216 &sensor_dev_attr_temp7_input.dev_attr.attr, 1217 &sensor_dev_attr_temp8_input.dev_attr.attr, 1218 &sensor_dev_attr_temp9_input.dev_attr.attr, 1219 &sensor_dev_attr_temp10_input.dev_attr.attr, 1220 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1221 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1222 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1223 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 1224 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 1225 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 1226 &sensor_dev_attr_temp7_alarm.dev_attr.attr, 1227 &sensor_dev_attr_temp8_alarm.dev_attr.attr, 1228 &sensor_dev_attr_temp9_alarm.dev_attr.attr, 1229 &sensor_dev_attr_temp10_alarm.dev_attr.attr, 1230 &sensor_dev_attr_fan1_max.dev_attr.attr, 1231 &sensor_dev_attr_fan2_max.dev_attr.attr, 1232 &sensor_dev_attr_fan3_max.dev_attr.attr, 1233 &sensor_dev_attr_fan4_max.dev_attr.attr, 1234 &sensor_dev_attr_fan1_min.dev_attr.attr, 1235 &sensor_dev_attr_fan2_min.dev_attr.attr, 1236 &sensor_dev_attr_fan3_min.dev_attr.attr, 1237 &sensor_dev_attr_fan4_min.dev_attr.attr, 1238 &sensor_dev_attr_fan1_input.dev_attr.attr, 1239 &sensor_dev_attr_fan2_input.dev_attr.attr, 1240 &sensor_dev_attr_fan3_input.dev_attr.attr, 1241 &sensor_dev_attr_fan4_input.dev_attr.attr, 1242 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1243 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1244 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1245 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1246 &sensor_dev_attr_force_pwm_max.dev_attr.attr, 1247 &sensor_dev_attr_pwm1.dev_attr.attr, 1248 &dev_attr_pwm1_freq.attr, 1249 &sensor_dev_attr_pwm2.dev_attr.attr, 1250 &sensor_dev_attr_pwm3.dev_attr.attr, 1251 &sensor_dev_attr_pwm4.dev_attr.attr, 1252 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1253 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1254 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1255 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr, 1256 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1257 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1258 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1259 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr, 1260 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1261 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1262 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1263 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr, 1264 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1265 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1266 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1267 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr, 1268 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1269 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1270 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1271 &sensor_dev_attr_pwm4_enable.dev_attr.attr, 1272 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1273 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1274 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1275 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr, 1276 NULL 1277 }; 1278 1279 ATTRIBUTE_GROUPS(adt7470); 1280 1281 /* Return 0 if detection is successful, -ENODEV otherwise */ 1282 static int adt7470_detect(struct i2c_client *client, 1283 struct i2c_board_info *info) 1284 { 1285 struct i2c_adapter *adapter = client->adapter; 1286 int vendor, device, revision; 1287 1288 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1289 return -ENODEV; 1290 1291 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR); 1292 if (vendor != ADT7470_VENDOR) 1293 return -ENODEV; 1294 1295 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE); 1296 if (device != ADT7470_DEVICE) 1297 return -ENODEV; 1298 1299 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION); 1300 if (revision != ADT7470_REVISION) 1301 return -ENODEV; 1302 1303 strlcpy(info->type, "adt7470", I2C_NAME_SIZE); 1304 1305 return 0; 1306 } 1307 1308 static void adt7470_init_client(struct i2c_client *client) 1309 { 1310 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 1311 1312 if (reg < 0) { 1313 dev_err(&client->dev, "cannot read configuration register\n"); 1314 } else { 1315 /* start monitoring (and do a self-test) */ 1316 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3); 1317 } 1318 } 1319 1320 static int adt7470_probe(struct i2c_client *client, 1321 const struct i2c_device_id *id) 1322 { 1323 struct device *dev = &client->dev; 1324 struct adt7470_data *data; 1325 struct device *hwmon_dev; 1326 1327 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL); 1328 if (!data) 1329 return -ENOMEM; 1330 1331 data->num_temp_sensors = -1; 1332 data->auto_update_interval = AUTO_UPDATE_INTERVAL; 1333 1334 i2c_set_clientdata(client, data); 1335 data->client = client; 1336 mutex_init(&data->lock); 1337 1338 dev_info(&client->dev, "%s chip found\n", client->name); 1339 1340 /* Initialize the ADT7470 chip */ 1341 adt7470_init_client(client); 1342 1343 /* Register sysfs hooks */ 1344 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1345 data, 1346 adt7470_groups); 1347 1348 if (IS_ERR(hwmon_dev)) 1349 return PTR_ERR(hwmon_dev); 1350 1351 data->auto_update = kthread_run(adt7470_update_thread, client, "%s", 1352 dev_name(hwmon_dev)); 1353 if (IS_ERR(data->auto_update)) { 1354 return PTR_ERR(data->auto_update); 1355 } 1356 1357 return 0; 1358 } 1359 1360 static int adt7470_remove(struct i2c_client *client) 1361 { 1362 struct adt7470_data *data = i2c_get_clientdata(client); 1363 1364 kthread_stop(data->auto_update); 1365 return 0; 1366 } 1367 1368 static const struct i2c_device_id adt7470_id[] = { 1369 { "adt7470", 0 }, 1370 { } 1371 }; 1372 MODULE_DEVICE_TABLE(i2c, adt7470_id); 1373 1374 static struct i2c_driver adt7470_driver = { 1375 .class = I2C_CLASS_HWMON, 1376 .driver = { 1377 .name = "adt7470", 1378 }, 1379 .probe = adt7470_probe, 1380 .remove = adt7470_remove, 1381 .id_table = adt7470_id, 1382 .detect = adt7470_detect, 1383 .address_list = normal_i2c, 1384 }; 1385 1386 module_i2c_driver(adt7470_driver); 1387 1388 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); 1389 MODULE_DESCRIPTION("ADT7470 driver"); 1390 MODULE_LICENSE("GPL"); 1391