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 temp_min_show(struct device *dev, 463 struct device_attribute *devattr, char *buf) 464 { 465 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 466 struct adt7470_data *data = adt7470_update_device(dev); 467 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]); 468 } 469 470 static ssize_t temp_min_store(struct device *dev, 471 struct device_attribute *devattr, 472 const char *buf, size_t count) 473 { 474 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 475 struct adt7470_data *data = dev_get_drvdata(dev); 476 struct i2c_client *client = data->client; 477 long temp; 478 479 if (kstrtol(buf, 10, &temp)) 480 return -EINVAL; 481 482 temp = clamp_val(temp, -128000, 127000); 483 temp = DIV_ROUND_CLOSEST(temp, 1000); 484 485 mutex_lock(&data->lock); 486 data->temp_min[attr->index] = temp; 487 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index), 488 temp); 489 mutex_unlock(&data->lock); 490 491 return count; 492 } 493 494 static ssize_t temp_max_show(struct device *dev, 495 struct device_attribute *devattr, char *buf) 496 { 497 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 498 struct adt7470_data *data = adt7470_update_device(dev); 499 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]); 500 } 501 502 static ssize_t temp_max_store(struct device *dev, 503 struct device_attribute *devattr, 504 const char *buf, size_t count) 505 { 506 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 507 struct adt7470_data *data = dev_get_drvdata(dev); 508 struct i2c_client *client = data->client; 509 long temp; 510 511 if (kstrtol(buf, 10, &temp)) 512 return -EINVAL; 513 514 temp = clamp_val(temp, -128000, 127000); 515 temp = DIV_ROUND_CLOSEST(temp, 1000); 516 517 mutex_lock(&data->lock); 518 data->temp_max[attr->index] = temp; 519 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index), 520 temp); 521 mutex_unlock(&data->lock); 522 523 return count; 524 } 525 526 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr, 527 char *buf) 528 { 529 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 530 struct adt7470_data *data = adt7470_update_device(dev); 531 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]); 532 } 533 534 static ssize_t alarm_mask_show(struct device *dev, 535 struct device_attribute *devattr, 536 char *buf) 537 { 538 struct adt7470_data *data = adt7470_update_device(dev); 539 540 return sprintf(buf, "%x\n", data->alarms_mask); 541 } 542 543 static ssize_t alarm_mask_store(struct device *dev, 544 struct device_attribute *devattr, 545 const char *buf, size_t count) 546 { 547 struct adt7470_data *data = dev_get_drvdata(dev); 548 long mask; 549 550 if (kstrtoul(buf, 0, &mask)) 551 return -EINVAL; 552 553 if (mask & ~0xffff) 554 return -EINVAL; 555 556 mutex_lock(&data->lock); 557 data->alarms_mask = mask; 558 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask); 559 mutex_unlock(&data->lock); 560 561 return count; 562 } 563 564 static ssize_t fan_max_show(struct device *dev, 565 struct device_attribute *devattr, char *buf) 566 { 567 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 568 struct adt7470_data *data = adt7470_update_device(dev); 569 570 if (FAN_DATA_VALID(data->fan_max[attr->index])) 571 return sprintf(buf, "%d\n", 572 FAN_PERIOD_TO_RPM(data->fan_max[attr->index])); 573 else 574 return sprintf(buf, "0\n"); 575 } 576 577 static ssize_t fan_max_store(struct device *dev, 578 struct device_attribute *devattr, 579 const char *buf, size_t count) 580 { 581 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 582 struct adt7470_data *data = dev_get_drvdata(dev); 583 struct i2c_client *client = data->client; 584 long temp; 585 586 if (kstrtol(buf, 10, &temp) || !temp) 587 return -EINVAL; 588 589 temp = FAN_RPM_TO_PERIOD(temp); 590 temp = clamp_val(temp, 1, 65534); 591 592 mutex_lock(&data->lock); 593 data->fan_max[attr->index] = temp; 594 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp); 595 mutex_unlock(&data->lock); 596 597 return count; 598 } 599 600 static ssize_t fan_min_show(struct device *dev, 601 struct device_attribute *devattr, char *buf) 602 { 603 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 604 struct adt7470_data *data = adt7470_update_device(dev); 605 606 if (FAN_DATA_VALID(data->fan_min[attr->index])) 607 return sprintf(buf, "%d\n", 608 FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); 609 else 610 return sprintf(buf, "0\n"); 611 } 612 613 static ssize_t fan_min_store(struct device *dev, 614 struct device_attribute *devattr, 615 const char *buf, size_t count) 616 { 617 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 618 struct adt7470_data *data = dev_get_drvdata(dev); 619 struct i2c_client *client = data->client; 620 long temp; 621 622 if (kstrtol(buf, 10, &temp) || !temp) 623 return -EINVAL; 624 625 temp = FAN_RPM_TO_PERIOD(temp); 626 temp = clamp_val(temp, 1, 65534); 627 628 mutex_lock(&data->lock); 629 data->fan_min[attr->index] = temp; 630 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp); 631 mutex_unlock(&data->lock); 632 633 return count; 634 } 635 636 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, 637 char *buf) 638 { 639 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 640 struct adt7470_data *data = adt7470_update_device(dev); 641 642 if (FAN_DATA_VALID(data->fan[attr->index])) 643 return sprintf(buf, "%d\n", 644 FAN_PERIOD_TO_RPM(data->fan[attr->index])); 645 else 646 return sprintf(buf, "0\n"); 647 } 648 649 static ssize_t force_pwm_max_show(struct device *dev, 650 struct device_attribute *devattr, char *buf) 651 { 652 struct adt7470_data *data = adt7470_update_device(dev); 653 return sprintf(buf, "%d\n", data->force_pwm_max); 654 } 655 656 static ssize_t force_pwm_max_store(struct device *dev, 657 struct device_attribute *devattr, 658 const char *buf, size_t count) 659 { 660 struct adt7470_data *data = dev_get_drvdata(dev); 661 struct i2c_client *client = data->client; 662 long temp; 663 u8 reg; 664 665 if (kstrtol(buf, 10, &temp)) 666 return -EINVAL; 667 668 mutex_lock(&data->lock); 669 data->force_pwm_max = temp; 670 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 671 if (temp) 672 reg |= ADT7470_FSPD_MASK; 673 else 674 reg &= ~ADT7470_FSPD_MASK; 675 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg); 676 mutex_unlock(&data->lock); 677 678 return count; 679 } 680 681 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr, 682 char *buf) 683 { 684 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 685 struct adt7470_data *data = adt7470_update_device(dev); 686 return sprintf(buf, "%d\n", data->pwm[attr->index]); 687 } 688 689 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr, 690 const char *buf, size_t count) 691 { 692 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 693 struct adt7470_data *data = dev_get_drvdata(dev); 694 struct i2c_client *client = data->client; 695 long temp; 696 697 if (kstrtol(buf, 10, &temp)) 698 return -EINVAL; 699 700 temp = clamp_val(temp, 0, 255); 701 702 mutex_lock(&data->lock); 703 data->pwm[attr->index] = temp; 704 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp); 705 mutex_unlock(&data->lock); 706 707 return count; 708 } 709 710 /* These are the valid PWM frequencies to the nearest Hz */ 711 static const int adt7470_freq_map[] = { 712 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500 713 }; 714 715 static ssize_t pwm1_freq_show(struct device *dev, 716 struct device_attribute *devattr, char *buf) 717 { 718 struct adt7470_data *data = adt7470_update_device(dev); 719 unsigned char cfg_reg_1; 720 unsigned char cfg_reg_2; 721 int index; 722 723 mutex_lock(&data->lock); 724 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG); 725 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2); 726 mutex_unlock(&data->lock); 727 728 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT; 729 if (!(cfg_reg_1 & ADT7470_CFG_LF)) 730 index += 8; 731 if (index >= ARRAY_SIZE(adt7470_freq_map)) 732 index = ARRAY_SIZE(adt7470_freq_map) - 1; 733 734 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]); 735 } 736 737 static ssize_t pwm1_freq_store(struct device *dev, 738 struct device_attribute *devattr, 739 const char *buf, size_t count) 740 { 741 struct adt7470_data *data = dev_get_drvdata(dev); 742 struct i2c_client *client = data->client; 743 long freq; 744 int index; 745 int low_freq = ADT7470_CFG_LF; 746 unsigned char val; 747 748 if (kstrtol(buf, 10, &freq)) 749 return -EINVAL; 750 751 /* Round the user value given to the closest available frequency */ 752 index = find_closest(freq, adt7470_freq_map, 753 ARRAY_SIZE(adt7470_freq_map)); 754 755 if (index >= 8) { 756 index -= 8; 757 low_freq = 0; 758 } 759 760 mutex_lock(&data->lock); 761 /* Configuration Register 1 */ 762 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 763 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, 764 (val & ~ADT7470_CFG_LF) | low_freq); 765 /* Configuration Register 2 */ 766 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2); 767 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2, 768 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT)); 769 mutex_unlock(&data->lock); 770 771 return count; 772 } 773 774 static ssize_t pwm_max_show(struct device *dev, 775 struct device_attribute *devattr, char *buf) 776 { 777 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 778 struct adt7470_data *data = adt7470_update_device(dev); 779 return sprintf(buf, "%d\n", data->pwm_max[attr->index]); 780 } 781 782 static ssize_t pwm_max_store(struct device *dev, 783 struct device_attribute *devattr, 784 const char *buf, size_t count) 785 { 786 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 787 struct adt7470_data *data = dev_get_drvdata(dev); 788 struct i2c_client *client = data->client; 789 long temp; 790 791 if (kstrtol(buf, 10, &temp)) 792 return -EINVAL; 793 794 temp = clamp_val(temp, 0, 255); 795 796 mutex_lock(&data->lock); 797 data->pwm_max[attr->index] = temp; 798 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index), 799 temp); 800 mutex_unlock(&data->lock); 801 802 return count; 803 } 804 805 static ssize_t pwm_min_show(struct device *dev, 806 struct device_attribute *devattr, char *buf) 807 { 808 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 809 struct adt7470_data *data = adt7470_update_device(dev); 810 return sprintf(buf, "%d\n", data->pwm_min[attr->index]); 811 } 812 813 static ssize_t pwm_min_store(struct device *dev, 814 struct device_attribute *devattr, 815 const char *buf, size_t count) 816 { 817 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 818 struct adt7470_data *data = dev_get_drvdata(dev); 819 struct i2c_client *client = data->client; 820 long temp; 821 822 if (kstrtol(buf, 10, &temp)) 823 return -EINVAL; 824 825 temp = clamp_val(temp, 0, 255); 826 827 mutex_lock(&data->lock); 828 data->pwm_min[attr->index] = temp; 829 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index), 830 temp); 831 mutex_unlock(&data->lock); 832 833 return count; 834 } 835 836 static ssize_t pwm_tmax_show(struct device *dev, 837 struct device_attribute *devattr, char *buf) 838 { 839 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 840 struct adt7470_data *data = adt7470_update_device(dev); 841 /* the datasheet says that tmax = tmin + 20C */ 842 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index])); 843 } 844 845 static ssize_t pwm_tmin_show(struct device *dev, 846 struct device_attribute *devattr, char *buf) 847 { 848 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 849 struct adt7470_data *data = adt7470_update_device(dev); 850 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]); 851 } 852 853 static ssize_t pwm_tmin_store(struct device *dev, 854 struct device_attribute *devattr, 855 const char *buf, size_t count) 856 { 857 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 858 struct adt7470_data *data = dev_get_drvdata(dev); 859 struct i2c_client *client = data->client; 860 long temp; 861 862 if (kstrtol(buf, 10, &temp)) 863 return -EINVAL; 864 865 temp = clamp_val(temp, -128000, 127000); 866 temp = DIV_ROUND_CLOSEST(temp, 1000); 867 868 mutex_lock(&data->lock); 869 data->pwm_tmin[attr->index] = temp; 870 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index), 871 temp); 872 mutex_unlock(&data->lock); 873 874 return count; 875 } 876 877 static ssize_t pwm_auto_show(struct device *dev, 878 struct device_attribute *devattr, char *buf) 879 { 880 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 881 struct adt7470_data *data = adt7470_update_device(dev); 882 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]); 883 } 884 885 static ssize_t pwm_auto_store(struct device *dev, 886 struct device_attribute *devattr, 887 const char *buf, size_t count) 888 { 889 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 890 struct adt7470_data *data = dev_get_drvdata(dev); 891 struct i2c_client *client = data->client; 892 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index); 893 int pwm_auto_reg_mask; 894 long temp; 895 u8 reg; 896 897 if (kstrtol(buf, 10, &temp)) 898 return -EINVAL; 899 900 if (attr->index % 2) 901 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK; 902 else 903 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK; 904 905 if (temp != 2 && temp != 1) 906 return -EINVAL; 907 temp--; 908 909 mutex_lock(&data->lock); 910 data->pwm_automatic[attr->index] = temp; 911 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 912 if (temp) 913 reg |= pwm_auto_reg_mask; 914 else 915 reg &= ~pwm_auto_reg_mask; 916 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 917 mutex_unlock(&data->lock); 918 919 return count; 920 } 921 922 static ssize_t pwm_auto_temp_show(struct device *dev, 923 struct device_attribute *devattr, char *buf) 924 { 925 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 926 struct adt7470_data *data = adt7470_update_device(dev); 927 u8 ctrl = data->pwm_auto_temp[attr->index]; 928 929 if (ctrl) 930 return sprintf(buf, "%d\n", 1 << (ctrl - 1)); 931 else 932 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS); 933 } 934 935 static int cvt_auto_temp(int input) 936 { 937 if (input == ADT7470_PWM_ALL_TEMPS) 938 return 0; 939 if (input < 1 || !is_power_of_2(input)) 940 return -EINVAL; 941 return ilog2(input) + 1; 942 } 943 944 static ssize_t pwm_auto_temp_store(struct device *dev, 945 struct device_attribute *devattr, 946 const char *buf, size_t count) 947 { 948 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 949 struct adt7470_data *data = dev_get_drvdata(dev); 950 struct i2c_client *client = data->client; 951 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); 952 long temp; 953 u8 reg; 954 955 if (kstrtol(buf, 10, &temp)) 956 return -EINVAL; 957 958 temp = cvt_auto_temp(temp); 959 if (temp < 0) 960 return temp; 961 962 mutex_lock(&data->lock); 963 data->pwm_automatic[attr->index] = temp; 964 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); 965 966 if (!(attr->index % 2)) { 967 reg &= 0xF; 968 reg |= (temp << 4) & 0xF0; 969 } else { 970 reg &= 0xF0; 971 reg |= temp & 0xF; 972 } 973 974 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); 975 mutex_unlock(&data->lock); 976 977 return count; 978 } 979 980 static ssize_t alarm_show(struct device *dev, 981 struct device_attribute *devattr, char *buf) 982 { 983 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 984 struct adt7470_data *data = adt7470_update_device(dev); 985 986 if (data->alarm & attr->index) 987 return sprintf(buf, "1\n"); 988 else 989 return sprintf(buf, "0\n"); 990 } 991 992 static DEVICE_ATTR_RW(alarm_mask); 993 static DEVICE_ATTR_RW(num_temp_sensors); 994 static DEVICE_ATTR_RW(auto_update_interval); 995 996 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); 997 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); 998 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); 999 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); 1000 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); 1001 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); 1002 static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6); 1003 static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7); 1004 static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8); 1005 static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9); 1006 1007 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); 1008 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); 1009 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); 1010 static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3); 1011 static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4); 1012 static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5); 1013 static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6); 1014 static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7); 1015 static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8); 1016 static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9); 1017 1018 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); 1019 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); 1020 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); 1021 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); 1022 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); 1023 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); 1024 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6); 1025 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7); 1026 static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8); 1027 static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9); 1028 1029 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM); 1030 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM); 1031 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM); 1032 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM); 1033 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM); 1034 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM); 1035 static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM); 1036 static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM)); 1037 static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM)); 1038 static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM)); 1039 1040 static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0); 1041 static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1); 1042 static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2); 1043 static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3); 1044 1045 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 1046 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 1047 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2); 1048 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3); 1049 1050 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 1051 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 1052 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); 1053 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3); 1054 1055 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM)); 1056 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM)); 1057 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM)); 1058 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM)); 1059 1060 static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0); 1061 1062 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); 1063 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); 1064 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2); 1065 static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3); 1066 1067 static DEVICE_ATTR_RW(pwm1_freq); 1068 1069 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0); 1070 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1); 1071 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2); 1072 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3); 1073 1074 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0); 1075 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1); 1076 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2); 1077 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3); 1078 1079 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0); 1080 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1); 1081 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2); 1082 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3); 1083 1084 static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0); 1085 static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1); 1086 static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2); 1087 static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3); 1088 1089 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0); 1090 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1); 1091 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2); 1092 static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3); 1093 1094 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0); 1095 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1); 1096 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2); 1097 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3); 1098 1099 static struct attribute *adt7470_attrs[] = { 1100 &dev_attr_alarm_mask.attr, 1101 &dev_attr_num_temp_sensors.attr, 1102 &dev_attr_auto_update_interval.attr, 1103 &sensor_dev_attr_temp1_max.dev_attr.attr, 1104 &sensor_dev_attr_temp2_max.dev_attr.attr, 1105 &sensor_dev_attr_temp3_max.dev_attr.attr, 1106 &sensor_dev_attr_temp4_max.dev_attr.attr, 1107 &sensor_dev_attr_temp5_max.dev_attr.attr, 1108 &sensor_dev_attr_temp6_max.dev_attr.attr, 1109 &sensor_dev_attr_temp7_max.dev_attr.attr, 1110 &sensor_dev_attr_temp8_max.dev_attr.attr, 1111 &sensor_dev_attr_temp9_max.dev_attr.attr, 1112 &sensor_dev_attr_temp10_max.dev_attr.attr, 1113 &sensor_dev_attr_temp1_min.dev_attr.attr, 1114 &sensor_dev_attr_temp2_min.dev_attr.attr, 1115 &sensor_dev_attr_temp3_min.dev_attr.attr, 1116 &sensor_dev_attr_temp4_min.dev_attr.attr, 1117 &sensor_dev_attr_temp5_min.dev_attr.attr, 1118 &sensor_dev_attr_temp6_min.dev_attr.attr, 1119 &sensor_dev_attr_temp7_min.dev_attr.attr, 1120 &sensor_dev_attr_temp8_min.dev_attr.attr, 1121 &sensor_dev_attr_temp9_min.dev_attr.attr, 1122 &sensor_dev_attr_temp10_min.dev_attr.attr, 1123 &sensor_dev_attr_temp1_input.dev_attr.attr, 1124 &sensor_dev_attr_temp2_input.dev_attr.attr, 1125 &sensor_dev_attr_temp3_input.dev_attr.attr, 1126 &sensor_dev_attr_temp4_input.dev_attr.attr, 1127 &sensor_dev_attr_temp5_input.dev_attr.attr, 1128 &sensor_dev_attr_temp6_input.dev_attr.attr, 1129 &sensor_dev_attr_temp7_input.dev_attr.attr, 1130 &sensor_dev_attr_temp8_input.dev_attr.attr, 1131 &sensor_dev_attr_temp9_input.dev_attr.attr, 1132 &sensor_dev_attr_temp10_input.dev_attr.attr, 1133 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1134 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1135 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1136 &sensor_dev_attr_temp4_alarm.dev_attr.attr, 1137 &sensor_dev_attr_temp5_alarm.dev_attr.attr, 1138 &sensor_dev_attr_temp6_alarm.dev_attr.attr, 1139 &sensor_dev_attr_temp7_alarm.dev_attr.attr, 1140 &sensor_dev_attr_temp8_alarm.dev_attr.attr, 1141 &sensor_dev_attr_temp9_alarm.dev_attr.attr, 1142 &sensor_dev_attr_temp10_alarm.dev_attr.attr, 1143 &sensor_dev_attr_fan1_max.dev_attr.attr, 1144 &sensor_dev_attr_fan2_max.dev_attr.attr, 1145 &sensor_dev_attr_fan3_max.dev_attr.attr, 1146 &sensor_dev_attr_fan4_max.dev_attr.attr, 1147 &sensor_dev_attr_fan1_min.dev_attr.attr, 1148 &sensor_dev_attr_fan2_min.dev_attr.attr, 1149 &sensor_dev_attr_fan3_min.dev_attr.attr, 1150 &sensor_dev_attr_fan4_min.dev_attr.attr, 1151 &sensor_dev_attr_fan1_input.dev_attr.attr, 1152 &sensor_dev_attr_fan2_input.dev_attr.attr, 1153 &sensor_dev_attr_fan3_input.dev_attr.attr, 1154 &sensor_dev_attr_fan4_input.dev_attr.attr, 1155 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1156 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1157 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1158 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1159 &sensor_dev_attr_force_pwm_max.dev_attr.attr, 1160 &sensor_dev_attr_pwm1.dev_attr.attr, 1161 &dev_attr_pwm1_freq.attr, 1162 &sensor_dev_attr_pwm2.dev_attr.attr, 1163 &sensor_dev_attr_pwm3.dev_attr.attr, 1164 &sensor_dev_attr_pwm4.dev_attr.attr, 1165 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1166 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1167 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1168 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr, 1169 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1170 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1171 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1172 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr, 1173 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1174 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 1175 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1176 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr, 1177 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1178 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 1179 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1180 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr, 1181 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1182 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1183 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1184 &sensor_dev_attr_pwm4_enable.dev_attr.attr, 1185 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1186 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1187 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1188 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr, 1189 NULL 1190 }; 1191 1192 ATTRIBUTE_GROUPS(adt7470); 1193 1194 /* Return 0 if detection is successful, -ENODEV otherwise */ 1195 static int adt7470_detect(struct i2c_client *client, 1196 struct i2c_board_info *info) 1197 { 1198 struct i2c_adapter *adapter = client->adapter; 1199 int vendor, device, revision; 1200 1201 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1202 return -ENODEV; 1203 1204 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR); 1205 if (vendor != ADT7470_VENDOR) 1206 return -ENODEV; 1207 1208 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE); 1209 if (device != ADT7470_DEVICE) 1210 return -ENODEV; 1211 1212 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION); 1213 if (revision != ADT7470_REVISION) 1214 return -ENODEV; 1215 1216 strlcpy(info->type, "adt7470", I2C_NAME_SIZE); 1217 1218 return 0; 1219 } 1220 1221 static void adt7470_init_client(struct i2c_client *client) 1222 { 1223 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); 1224 1225 if (reg < 0) { 1226 dev_err(&client->dev, "cannot read configuration register\n"); 1227 } else { 1228 /* start monitoring (and do a self-test) */ 1229 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3); 1230 } 1231 } 1232 1233 static int adt7470_probe(struct i2c_client *client, 1234 const struct i2c_device_id *id) 1235 { 1236 struct device *dev = &client->dev; 1237 struct adt7470_data *data; 1238 struct device *hwmon_dev; 1239 1240 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL); 1241 if (!data) 1242 return -ENOMEM; 1243 1244 data->num_temp_sensors = -1; 1245 data->auto_update_interval = AUTO_UPDATE_INTERVAL; 1246 1247 i2c_set_clientdata(client, data); 1248 data->client = client; 1249 mutex_init(&data->lock); 1250 1251 dev_info(&client->dev, "%s chip found\n", client->name); 1252 1253 /* Initialize the ADT7470 chip */ 1254 adt7470_init_client(client); 1255 1256 /* Register sysfs hooks */ 1257 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1258 data, 1259 adt7470_groups); 1260 1261 if (IS_ERR(hwmon_dev)) 1262 return PTR_ERR(hwmon_dev); 1263 1264 data->auto_update = kthread_run(adt7470_update_thread, client, "%s", 1265 dev_name(hwmon_dev)); 1266 if (IS_ERR(data->auto_update)) { 1267 return PTR_ERR(data->auto_update); 1268 } 1269 1270 return 0; 1271 } 1272 1273 static int adt7470_remove(struct i2c_client *client) 1274 { 1275 struct adt7470_data *data = i2c_get_clientdata(client); 1276 1277 kthread_stop(data->auto_update); 1278 return 0; 1279 } 1280 1281 static const struct i2c_device_id adt7470_id[] = { 1282 { "adt7470", 0 }, 1283 { } 1284 }; 1285 MODULE_DEVICE_TABLE(i2c, adt7470_id); 1286 1287 static struct i2c_driver adt7470_driver = { 1288 .class = I2C_CLASS_HWMON, 1289 .driver = { 1290 .name = "adt7470", 1291 }, 1292 .probe = adt7470_probe, 1293 .remove = adt7470_remove, 1294 .id_table = adt7470_id, 1295 .detect = adt7470_detect, 1296 .address_list = normal_i2c, 1297 }; 1298 1299 module_i2c_driver(adt7470_driver); 1300 1301 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); 1302 MODULE_DESCRIPTION("ADT7470 driver"); 1303 MODULE_LICENSE("GPL"); 1304