1 /* 2 * nct7802 - Driver for Nuvoton NCT7802Y 3 * 4 * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/err.h> 20 #include <linux/i2c.h> 21 #include <linux/init.h> 22 #include <linux/hwmon.h> 23 #include <linux/hwmon-sysfs.h> 24 #include <linux/jiffies.h> 25 #include <linux/module.h> 26 #include <linux/mutex.h> 27 #include <linux/regmap.h> 28 #include <linux/slab.h> 29 30 #define DRVNAME "nct7802" 31 32 static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e }; 33 34 static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = { 35 { 0x40, 0x00, 0x42, 0x44, 0x46 }, 36 { 0x3f, 0x00, 0x41, 0x43, 0x45 }, 37 }; 38 39 static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 }; 40 41 static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { 42 { 0, 0, 4, 0, 4 }, 43 { 2, 0, 6, 2, 6 }, 44 }; 45 46 #define REG_BANK 0x00 47 #define REG_TEMP_LSB 0x05 48 #define REG_TEMP_PECI_LSB 0x08 49 #define REG_VOLTAGE_LOW 0x0f 50 #define REG_FANCOUNT_LOW 0x13 51 #define REG_START 0x21 52 #define REG_MODE 0x22 /* 7.2.32 Mode Selection Register */ 53 #define REG_PECI_ENABLE 0x23 54 #define REG_FAN_ENABLE 0x24 55 #define REG_VMON_ENABLE 0x25 56 #define REG_PWM(x) (0x60 + (x)) 57 #define REG_SMARTFAN_EN(x) (0x64 + (x) / 2) 58 #define SMARTFAN_EN_SHIFT(x) ((x) % 2 * 4) 59 #define REG_VENDOR_ID 0xfd 60 #define REG_CHIP_ID 0xfe 61 #define REG_VERSION_ID 0xff 62 63 /* 64 * Data structures and manipulation thereof 65 */ 66 67 struct nct7802_data { 68 struct regmap *regmap; 69 struct mutex access_lock; /* for multi-byte read and write operations */ 70 }; 71 72 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr, 73 char *buf) 74 { 75 struct nct7802_data *data = dev_get_drvdata(dev); 76 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 77 unsigned int mode; 78 int ret; 79 80 ret = regmap_read(data->regmap, REG_MODE, &mode); 81 if (ret < 0) 82 return ret; 83 84 return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2); 85 } 86 87 static ssize_t store_temp_type(struct device *dev, 88 struct device_attribute *attr, 89 const char *buf, size_t count) 90 { 91 struct nct7802_data *data = dev_get_drvdata(dev); 92 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 93 unsigned int type; 94 int err; 95 96 err = kstrtouint(buf, 0, &type); 97 if (err < 0) 98 return err; 99 if (sattr->index == 2 && type != 4) /* RD3 */ 100 return -EINVAL; 101 if (type < 3 || type > 4) 102 return -EINVAL; 103 err = regmap_update_bits(data->regmap, REG_MODE, 104 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index); 105 return err ? : count; 106 } 107 108 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr, 109 char *buf) 110 { 111 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 112 struct nct7802_data *data = dev_get_drvdata(dev); 113 unsigned int regval; 114 int ret; 115 116 if (sattr->index > 1) 117 return sprintf(buf, "1\n"); 118 119 ret = regmap_read(data->regmap, 0x5E, ®val); 120 if (ret < 0) 121 return ret; 122 123 return sprintf(buf, "%u\n", !(regval & (1 << sattr->index))); 124 } 125 126 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr, 127 char *buf) 128 { 129 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 130 struct nct7802_data *data = dev_get_drvdata(dev); 131 unsigned int val; 132 int ret; 133 134 if (!attr->index) 135 return sprintf(buf, "255\n"); 136 137 ret = regmap_read(data->regmap, attr->index, &val); 138 if (ret < 0) 139 return ret; 140 141 return sprintf(buf, "%d\n", val); 142 } 143 144 static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr, 145 const char *buf, size_t count) 146 { 147 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 148 struct nct7802_data *data = dev_get_drvdata(dev); 149 int err; 150 u8 val; 151 152 err = kstrtou8(buf, 0, &val); 153 if (err < 0) 154 return err; 155 156 err = regmap_write(data->regmap, attr->index, val); 157 return err ? : count; 158 } 159 160 static ssize_t show_pwm_enable(struct device *dev, 161 struct device_attribute *attr, char *buf) 162 { 163 struct nct7802_data *data = dev_get_drvdata(dev); 164 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 165 unsigned int reg, enabled; 166 int ret; 167 168 ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), ®); 169 if (ret < 0) 170 return ret; 171 enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1; 172 return sprintf(buf, "%u\n", enabled + 1); 173 } 174 175 static ssize_t store_pwm_enable(struct device *dev, 176 struct device_attribute *attr, 177 const char *buf, size_t count) 178 { 179 struct nct7802_data *data = dev_get_drvdata(dev); 180 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 181 u8 val; 182 int ret; 183 184 ret = kstrtou8(buf, 0, &val); 185 if (ret < 0) 186 return ret; 187 if (val < 1 || val > 2) 188 return -EINVAL; 189 ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index), 190 1 << SMARTFAN_EN_SHIFT(sattr->index), 191 (val - 1) << SMARTFAN_EN_SHIFT(sattr->index)); 192 return ret ? : count; 193 } 194 195 static int nct7802_read_temp(struct nct7802_data *data, 196 u8 reg_temp, u8 reg_temp_low, int *temp) 197 { 198 unsigned int t1, t2 = 0; 199 int err; 200 201 *temp = 0; 202 203 mutex_lock(&data->access_lock); 204 err = regmap_read(data->regmap, reg_temp, &t1); 205 if (err < 0) 206 goto abort; 207 t1 <<= 8; 208 if (reg_temp_low) { /* 11 bit data */ 209 err = regmap_read(data->regmap, reg_temp_low, &t2); 210 if (err < 0) 211 goto abort; 212 } 213 t1 |= t2 & 0xe0; 214 *temp = (s16)t1 / 32 * 125; 215 abort: 216 mutex_unlock(&data->access_lock); 217 return err; 218 } 219 220 static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan) 221 { 222 unsigned int f1, f2; 223 int ret; 224 225 mutex_lock(&data->access_lock); 226 ret = regmap_read(data->regmap, reg_fan, &f1); 227 if (ret < 0) 228 goto abort; 229 ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2); 230 if (ret < 0) 231 goto abort; 232 ret = (f1 << 5) | (f2 >> 3); 233 /* convert fan count to rpm */ 234 if (ret == 0x1fff) /* maximum value, assume fan is stopped */ 235 ret = 0; 236 else if (ret) 237 ret = DIV_ROUND_CLOSEST(1350000U, ret); 238 abort: 239 mutex_unlock(&data->access_lock); 240 return ret; 241 } 242 243 static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low, 244 u8 reg_fan_high) 245 { 246 unsigned int f1, f2; 247 int ret; 248 249 mutex_lock(&data->access_lock); 250 ret = regmap_read(data->regmap, reg_fan_low, &f1); 251 if (ret < 0) 252 goto abort; 253 ret = regmap_read(data->regmap, reg_fan_high, &f2); 254 if (ret < 0) 255 goto abort; 256 ret = f1 | ((f2 & 0xf8) << 5); 257 /* convert fan count to rpm */ 258 if (ret == 0x1fff) /* maximum value, assume no limit */ 259 ret = 0; 260 else if (ret) 261 ret = DIV_ROUND_CLOSEST(1350000U, ret); 262 else 263 ret = 1350000U; 264 abort: 265 mutex_unlock(&data->access_lock); 266 return ret; 267 } 268 269 static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low, 270 u8 reg_fan_high, unsigned long limit) 271 { 272 int err; 273 274 if (limit) 275 limit = DIV_ROUND_CLOSEST(1350000U, limit); 276 else 277 limit = 0x1fff; 278 limit = clamp_val(limit, 0, 0x1fff); 279 280 mutex_lock(&data->access_lock); 281 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff); 282 if (err < 0) 283 goto abort; 284 285 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5); 286 abort: 287 mutex_unlock(&data->access_lock); 288 return err; 289 } 290 291 static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 }; 292 293 static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index) 294 { 295 unsigned int v1, v2; 296 int ret; 297 298 mutex_lock(&data->access_lock); 299 if (index == 0) { /* voltage */ 300 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1); 301 if (ret < 0) 302 goto abort; 303 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2); 304 if (ret < 0) 305 goto abort; 306 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr]; 307 } else { /* limit */ 308 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; 309 310 ret = regmap_read(data->regmap, 311 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1); 312 if (ret < 0) 313 goto abort; 314 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], 315 &v2); 316 if (ret < 0) 317 goto abort; 318 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr]; 319 } 320 abort: 321 mutex_unlock(&data->access_lock); 322 return ret; 323 } 324 325 static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index, 326 unsigned long voltage) 327 { 328 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; 329 int err; 330 331 voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]); 332 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]); 333 334 mutex_lock(&data->access_lock); 335 err = regmap_write(data->regmap, 336 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], 337 voltage & 0xff); 338 if (err < 0) 339 goto abort; 340 341 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], 342 0x0300 >> shift, (voltage & 0x0300) >> shift); 343 abort: 344 mutex_unlock(&data->access_lock); 345 return err; 346 } 347 348 static ssize_t show_in(struct device *dev, struct device_attribute *attr, 349 char *buf) 350 { 351 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 352 struct nct7802_data *data = dev_get_drvdata(dev); 353 int voltage; 354 355 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index); 356 if (voltage < 0) 357 return voltage; 358 359 return sprintf(buf, "%d\n", voltage); 360 } 361 362 static ssize_t store_in(struct device *dev, struct device_attribute *attr, 363 const char *buf, size_t count) 364 { 365 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 366 struct nct7802_data *data = dev_get_drvdata(dev); 367 int index = sattr->index; 368 int nr = sattr->nr; 369 unsigned long val; 370 int err; 371 372 err = kstrtoul(buf, 10, &val); 373 if (err < 0) 374 return err; 375 376 err = nct7802_write_voltage(data, nr, index, val); 377 return err ? : count; 378 } 379 380 static ssize_t show_temp(struct device *dev, struct device_attribute *attr, 381 char *buf) 382 { 383 struct nct7802_data *data = dev_get_drvdata(dev); 384 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 385 int err, temp; 386 387 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp); 388 if (err < 0) 389 return err; 390 391 return sprintf(buf, "%d\n", temp); 392 } 393 394 static ssize_t store_temp(struct device *dev, struct device_attribute *attr, 395 const char *buf, size_t count) 396 { 397 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 398 struct nct7802_data *data = dev_get_drvdata(dev); 399 int nr = sattr->nr; 400 long val; 401 int err; 402 403 err = kstrtol(buf, 10, &val); 404 if (err < 0) 405 return err; 406 407 val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000); 408 409 err = regmap_write(data->regmap, nr, val & 0xff); 410 return err ? : count; 411 } 412 413 static ssize_t show_fan(struct device *dev, struct device_attribute *attr, 414 char *buf) 415 { 416 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); 417 struct nct7802_data *data = dev_get_drvdata(dev); 418 int speed; 419 420 speed = nct7802_read_fan(data, sattr->index); 421 if (speed < 0) 422 return speed; 423 424 return sprintf(buf, "%d\n", speed); 425 } 426 427 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr, 428 char *buf) 429 { 430 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 431 struct nct7802_data *data = dev_get_drvdata(dev); 432 int speed; 433 434 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index); 435 if (speed < 0) 436 return speed; 437 438 return sprintf(buf, "%d\n", speed); 439 } 440 441 static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, 442 const char *buf, size_t count) 443 { 444 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 445 struct nct7802_data *data = dev_get_drvdata(dev); 446 unsigned long val; 447 int err; 448 449 err = kstrtoul(buf, 10, &val); 450 if (err < 0) 451 return err; 452 453 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val); 454 return err ? : count; 455 } 456 457 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, 458 char *buf) 459 { 460 struct nct7802_data *data = dev_get_drvdata(dev); 461 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 462 int bit = sattr->index; 463 unsigned int val; 464 int ret; 465 466 ret = regmap_read(data->regmap, sattr->nr, &val); 467 if (ret < 0) 468 return ret; 469 470 return sprintf(buf, "%u\n", !!(val & (1 << bit))); 471 } 472 473 static ssize_t 474 show_beep(struct device *dev, struct device_attribute *attr, char *buf) 475 { 476 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 477 struct nct7802_data *data = dev_get_drvdata(dev); 478 unsigned int regval; 479 int err; 480 481 err = regmap_read(data->regmap, sattr->nr, ®val); 482 if (err) 483 return err; 484 485 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index))); 486 } 487 488 static ssize_t 489 store_beep(struct device *dev, struct device_attribute *attr, const char *buf, 490 size_t count) 491 { 492 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 493 struct nct7802_data *data = dev_get_drvdata(dev); 494 unsigned long val; 495 int err; 496 497 err = kstrtoul(buf, 10, &val); 498 if (err < 0) 499 return err; 500 if (val > 1) 501 return -EINVAL; 502 503 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index, 504 val ? 1 << sattr->index : 0); 505 return err ? : count; 506 } 507 508 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, 509 show_temp_type, store_temp_type, 0); 510 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01, 511 REG_TEMP_LSB); 512 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, 513 store_temp, 0x31, 0); 514 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, 515 store_temp, 0x30, 0); 516 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, 517 store_temp, 0x3a, 0); 518 519 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, 520 show_temp_type, store_temp_type, 1); 521 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02, 522 REG_TEMP_LSB); 523 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, 524 store_temp, 0x33, 0); 525 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, 526 store_temp, 0x32, 0); 527 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, 528 store_temp, 0x3b, 0); 529 530 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, 531 show_temp_type, store_temp_type, 2); 532 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03, 533 REG_TEMP_LSB); 534 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, 535 store_temp, 0x35, 0); 536 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, 537 store_temp, 0x34, 0); 538 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, 539 store_temp, 0x3c, 0); 540 541 static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0); 542 static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp, 543 store_temp, 0x37, 0); 544 static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, 545 store_temp, 0x36, 0); 546 static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, 547 store_temp, 0x3d, 0); 548 549 static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06, 550 REG_TEMP_PECI_LSB); 551 static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp, 552 store_temp, 0x39, 0); 553 static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, 554 store_temp, 0x38, 0); 555 static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, 556 store_temp, 0x3e, 0); 557 558 static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07, 559 REG_TEMP_PECI_LSB); 560 561 static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 562 0x18, 0); 563 static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 564 0x18, 1); 565 static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 566 0x18, 2); 567 static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL, 568 0x18, 3); 569 static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL, 570 0x18, 4); 571 572 static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 573 0x19, 0); 574 static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 575 0x19, 1); 576 static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 577 0x19, 2); 578 static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 579 0x19, 3); 580 static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 581 0x19, 4); 582 583 static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 584 0x1b, 0); 585 static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 586 0x1b, 1); 587 static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 588 0x1b, 2); 589 static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 590 0x1b, 3); 591 static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 592 0x1b, 4); 593 594 static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0); 595 static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1); 596 static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2); 597 598 static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep, 599 store_beep, 0x5c, 0); 600 static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep, 601 store_beep, 0x5c, 1); 602 static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep, 603 store_beep, 0x5c, 2); 604 static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep, 605 store_beep, 0x5c, 3); 606 static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep, 607 store_beep, 0x5c, 4); 608 static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep, 609 store_beep, 0x5c, 5); 610 611 static struct attribute *nct7802_temp_attrs[] = { 612 &sensor_dev_attr_temp1_type.dev_attr.attr, 613 &sensor_dev_attr_temp1_input.dev_attr.attr, 614 &sensor_dev_attr_temp1_min.dev_attr.attr, 615 &sensor_dev_attr_temp1_max.dev_attr.attr, 616 &sensor_dev_attr_temp1_crit.dev_attr.attr, 617 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, 618 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 619 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 620 &sensor_dev_attr_temp1_fault.dev_attr.attr, 621 &sensor_dev_attr_temp1_beep.dev_attr.attr, 622 623 &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */ 624 &sensor_dev_attr_temp2_input.dev_attr.attr, 625 &sensor_dev_attr_temp2_min.dev_attr.attr, 626 &sensor_dev_attr_temp2_max.dev_attr.attr, 627 &sensor_dev_attr_temp2_crit.dev_attr.attr, 628 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 629 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 630 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 631 &sensor_dev_attr_temp2_fault.dev_attr.attr, 632 &sensor_dev_attr_temp2_beep.dev_attr.attr, 633 634 &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */ 635 &sensor_dev_attr_temp3_input.dev_attr.attr, 636 &sensor_dev_attr_temp3_min.dev_attr.attr, 637 &sensor_dev_attr_temp3_max.dev_attr.attr, 638 &sensor_dev_attr_temp3_crit.dev_attr.attr, 639 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, 640 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, 641 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, 642 &sensor_dev_attr_temp3_fault.dev_attr.attr, 643 &sensor_dev_attr_temp3_beep.dev_attr.attr, 644 645 &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */ 646 &sensor_dev_attr_temp4_min.dev_attr.attr, 647 &sensor_dev_attr_temp4_max.dev_attr.attr, 648 &sensor_dev_attr_temp4_crit.dev_attr.attr, 649 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, 650 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, 651 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, 652 &sensor_dev_attr_temp4_beep.dev_attr.attr, 653 654 &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */ 655 &sensor_dev_attr_temp5_min.dev_attr.attr, 656 &sensor_dev_attr_temp5_max.dev_attr.attr, 657 &sensor_dev_attr_temp5_crit.dev_attr.attr, 658 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr, 659 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, 660 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, 661 &sensor_dev_attr_temp5_beep.dev_attr.attr, 662 663 &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */ 664 &sensor_dev_attr_temp6_beep.dev_attr.attr, 665 666 NULL 667 }; 668 669 static umode_t nct7802_temp_is_visible(struct kobject *kobj, 670 struct attribute *attr, int index) 671 { 672 struct device *dev = container_of(kobj, struct device, kobj); 673 struct nct7802_data *data = dev_get_drvdata(dev); 674 unsigned int reg; 675 int err; 676 677 err = regmap_read(data->regmap, REG_MODE, ®); 678 if (err < 0) 679 return 0; 680 681 if (index < 10 && 682 (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */ 683 return 0; 684 685 if (index >= 10 && index < 20 && 686 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */ 687 return 0; 688 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */ 689 return 0; 690 691 if (index >= 30 && index < 38) /* local */ 692 return attr->mode; 693 694 err = regmap_read(data->regmap, REG_PECI_ENABLE, ®); 695 if (err < 0) 696 return 0; 697 698 if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */ 699 return 0; 700 701 if (index >= 0x46 && (!(reg & 0x02))) /* PECI 1 */ 702 return 0; 703 704 return attr->mode; 705 } 706 707 static struct attribute_group nct7802_temp_group = { 708 .attrs = nct7802_temp_attrs, 709 .is_visible = nct7802_temp_is_visible, 710 }; 711 712 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0); 713 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in, 714 0, 1); 715 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in, 716 0, 2); 717 static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3); 718 static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 719 0x5a, 3); 720 721 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0); 722 723 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0); 724 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in, 725 2, 1); 726 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in, 727 2, 2); 728 static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0); 729 static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 730 0x5a, 0); 731 732 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0); 733 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in, 734 3, 1); 735 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in, 736 3, 2); 737 static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1); 738 static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 739 0x5a, 1); 740 741 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0); 742 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in, 743 4, 1); 744 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in, 745 4, 2); 746 static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2); 747 static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 748 0x5a, 2); 749 750 static struct attribute *nct7802_in_attrs[] = { 751 &sensor_dev_attr_in0_input.dev_attr.attr, 752 &sensor_dev_attr_in0_min.dev_attr.attr, 753 &sensor_dev_attr_in0_max.dev_attr.attr, 754 &sensor_dev_attr_in0_alarm.dev_attr.attr, 755 &sensor_dev_attr_in0_beep.dev_attr.attr, 756 757 &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */ 758 759 &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */ 760 &sensor_dev_attr_in2_min.dev_attr.attr, 761 &sensor_dev_attr_in2_max.dev_attr.attr, 762 &sensor_dev_attr_in2_alarm.dev_attr.attr, 763 &sensor_dev_attr_in2_beep.dev_attr.attr, 764 765 &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */ 766 &sensor_dev_attr_in3_min.dev_attr.attr, 767 &sensor_dev_attr_in3_max.dev_attr.attr, 768 &sensor_dev_attr_in3_alarm.dev_attr.attr, 769 &sensor_dev_attr_in3_beep.dev_attr.attr, 770 771 &sensor_dev_attr_in4_input.dev_attr.attr, /* 17 */ 772 &sensor_dev_attr_in4_min.dev_attr.attr, 773 &sensor_dev_attr_in4_max.dev_attr.attr, 774 &sensor_dev_attr_in4_alarm.dev_attr.attr, 775 &sensor_dev_attr_in4_beep.dev_attr.attr, 776 777 NULL, 778 }; 779 780 static umode_t nct7802_in_is_visible(struct kobject *kobj, 781 struct attribute *attr, int index) 782 { 783 struct device *dev = container_of(kobj, struct device, kobj); 784 struct nct7802_data *data = dev_get_drvdata(dev); 785 unsigned int reg; 786 int err; 787 788 if (index < 6) /* VCC, VCORE */ 789 return attr->mode; 790 791 err = regmap_read(data->regmap, REG_MODE, ®); 792 if (err < 0) 793 return 0; 794 795 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */ 796 return 0; 797 if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c) /* VSEN2 */ 798 return 0; 799 if (index >= 17 && (reg & 0x30) != 0x30) /* VSEN3 */ 800 return 0; 801 802 return attr->mode; 803 } 804 805 static struct attribute_group nct7802_in_group = { 806 .attrs = nct7802_in_attrs, 807 .is_visible = nct7802_in_is_visible, 808 }; 809 810 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10); 811 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min, 812 store_fan_min, 0x49, 0x4c); 813 static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0); 814 static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 815 0x5b, 0); 816 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11); 817 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min, 818 store_fan_min, 0x4a, 0x4d); 819 static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1); 820 static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 821 0x5b, 1); 822 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12); 823 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min, 824 store_fan_min, 0x4b, 0x4e); 825 static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2); 826 static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 827 0x5b, 2); 828 829 /* 7.2.89 Fan Control Output Type */ 830 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0); 831 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1); 832 static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2); 833 834 /* 7.2.91... Fan Control Output Value */ 835 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 836 REG_PWM(0)); 837 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 838 REG_PWM(1)); 839 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 840 REG_PWM(2)); 841 842 /* 7.2.95... Temperature to Fan mapping Relationships Register */ 843 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable, 844 store_pwm_enable, 0); 845 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable, 846 store_pwm_enable, 1); 847 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable, 848 store_pwm_enable, 2); 849 850 static struct attribute *nct7802_fan_attrs[] = { 851 &sensor_dev_attr_fan1_input.dev_attr.attr, 852 &sensor_dev_attr_fan1_min.dev_attr.attr, 853 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 854 &sensor_dev_attr_fan1_beep.dev_attr.attr, 855 &sensor_dev_attr_fan2_input.dev_attr.attr, 856 &sensor_dev_attr_fan2_min.dev_attr.attr, 857 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 858 &sensor_dev_attr_fan2_beep.dev_attr.attr, 859 &sensor_dev_attr_fan3_input.dev_attr.attr, 860 &sensor_dev_attr_fan3_min.dev_attr.attr, 861 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 862 &sensor_dev_attr_fan3_beep.dev_attr.attr, 863 864 NULL 865 }; 866 867 static umode_t nct7802_fan_is_visible(struct kobject *kobj, 868 struct attribute *attr, int index) 869 { 870 struct device *dev = container_of(kobj, struct device, kobj); 871 struct nct7802_data *data = dev_get_drvdata(dev); 872 int fan = index / 4; /* 4 attributes per fan */ 873 unsigned int reg; 874 int err; 875 876 err = regmap_read(data->regmap, REG_FAN_ENABLE, ®); 877 if (err < 0 || !(reg & (1 << fan))) 878 return 0; 879 880 return attr->mode; 881 } 882 883 static struct attribute_group nct7802_fan_group = { 884 .attrs = nct7802_fan_attrs, 885 .is_visible = nct7802_fan_is_visible, 886 }; 887 888 static struct attribute *nct7802_pwm_attrs[] = { 889 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 890 &sensor_dev_attr_pwm1_mode.dev_attr.attr, 891 &sensor_dev_attr_pwm1.dev_attr.attr, 892 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 893 &sensor_dev_attr_pwm2_mode.dev_attr.attr, 894 &sensor_dev_attr_pwm2.dev_attr.attr, 895 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 896 &sensor_dev_attr_pwm3_mode.dev_attr.attr, 897 &sensor_dev_attr_pwm3.dev_attr.attr, 898 NULL 899 }; 900 901 static struct attribute_group nct7802_pwm_group = { 902 .attrs = nct7802_pwm_attrs, 903 }; 904 905 /* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */ 906 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR, 907 show_temp, store_temp, 0x80, 0); 908 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR, 909 show_temp, store_temp, 0x81, 0); 910 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR, 911 show_temp, store_temp, 0x82, 0); 912 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR, 913 show_temp, store_temp, 0x83, 0); 914 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point5_temp, S_IRUGO | S_IWUSR, 915 show_temp, store_temp, 0x84, 0); 916 917 /* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */ 918 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, 919 show_pwm, store_pwm, 0x85); 920 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, 921 show_pwm, store_pwm, 0x86); 922 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR, 923 show_pwm, store_pwm, 0x87); 924 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IRUGO | S_IWUSR, 925 show_pwm, store_pwm, 0x88); 926 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0); 927 928 /* 7.2.124 Table 2 X-axis Transition Point 1 Register */ 929 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR, 930 show_temp, store_temp, 0x90, 0); 931 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR, 932 show_temp, store_temp, 0x91, 0); 933 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR, 934 show_temp, store_temp, 0x92, 0); 935 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR, 936 show_temp, store_temp, 0x93, 0); 937 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point5_temp, S_IRUGO | S_IWUSR, 938 show_temp, store_temp, 0x94, 0); 939 940 /* 7.2.129 Table 2 Y-axis Transition Point 1 Register */ 941 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, 942 show_pwm, store_pwm, 0x95); 943 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, 944 show_pwm, store_pwm, 0x96); 945 static SENSOR_DEVICE_ATTR(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR, 946 show_pwm, store_pwm, 0x97); 947 static SENSOR_DEVICE_ATTR(pwm2_auto_point4_pwm, S_IRUGO | S_IWUSR, 948 show_pwm, store_pwm, 0x98); 949 static SENSOR_DEVICE_ATTR(pwm2_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0); 950 951 /* 7.2.133 Table 3 X-axis Transition Point 1 Register */ 952 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR, 953 show_temp, store_temp, 0xA0, 0); 954 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR, 955 show_temp, store_temp, 0xA1, 0); 956 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR, 957 show_temp, store_temp, 0xA2, 0); 958 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR, 959 show_temp, store_temp, 0xA3, 0); 960 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point5_temp, S_IRUGO | S_IWUSR, 961 show_temp, store_temp, 0xA4, 0); 962 963 /* 7.2.138 Table 3 Y-axis Transition Point 1 Register */ 964 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, 965 show_pwm, store_pwm, 0xA5); 966 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, 967 show_pwm, store_pwm, 0xA6); 968 static SENSOR_DEVICE_ATTR(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR, 969 show_pwm, store_pwm, 0xA7); 970 static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR, 971 show_pwm, store_pwm, 0xA8); 972 static SENSOR_DEVICE_ATTR(pwm3_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0); 973 974 static struct attribute *nct7802_auto_point_attrs[] = { 975 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 976 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 977 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 978 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 979 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 980 981 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 982 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 983 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 984 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 985 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 986 987 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, 988 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, 989 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, 990 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, 991 &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr, 992 993 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 994 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 995 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, 996 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, 997 &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr, 998 999 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, 1000 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, 1001 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, 1002 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, 1003 &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr, 1004 1005 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1006 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1007 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, 1008 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, 1009 &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr, 1010 1011 NULL 1012 }; 1013 1014 static struct attribute_group nct7802_auto_point_group = { 1015 .attrs = nct7802_auto_point_attrs, 1016 }; 1017 1018 static const struct attribute_group *nct7802_groups[] = { 1019 &nct7802_temp_group, 1020 &nct7802_in_group, 1021 &nct7802_fan_group, 1022 &nct7802_pwm_group, 1023 &nct7802_auto_point_group, 1024 NULL 1025 }; 1026 1027 static int nct7802_detect(struct i2c_client *client, 1028 struct i2c_board_info *info) 1029 { 1030 int reg; 1031 1032 /* 1033 * Chip identification registers are only available in bank 0, 1034 * so only attempt chip detection if bank 0 is selected 1035 */ 1036 reg = i2c_smbus_read_byte_data(client, REG_BANK); 1037 if (reg != 0x00) 1038 return -ENODEV; 1039 1040 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID); 1041 if (reg != 0x50) 1042 return -ENODEV; 1043 1044 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID); 1045 if (reg != 0xc3) 1046 return -ENODEV; 1047 1048 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID); 1049 if (reg < 0 || (reg & 0xf0) != 0x20) 1050 return -ENODEV; 1051 1052 /* Also validate lower bits of voltage and temperature registers */ 1053 reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB); 1054 if (reg < 0 || (reg & 0x1f)) 1055 return -ENODEV; 1056 1057 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB); 1058 if (reg < 0 || (reg & 0x3f)) 1059 return -ENODEV; 1060 1061 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW); 1062 if (reg < 0 || (reg & 0x3f)) 1063 return -ENODEV; 1064 1065 strlcpy(info->type, "nct7802", I2C_NAME_SIZE); 1066 return 0; 1067 } 1068 1069 static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg) 1070 { 1071 return (reg != REG_BANK && reg <= 0x20) || 1072 (reg >= REG_PWM(0) && reg <= REG_PWM(2)); 1073 } 1074 1075 static const struct regmap_config nct7802_regmap_config = { 1076 .reg_bits = 8, 1077 .val_bits = 8, 1078 .cache_type = REGCACHE_RBTREE, 1079 .volatile_reg = nct7802_regmap_is_volatile, 1080 }; 1081 1082 static int nct7802_init_chip(struct nct7802_data *data) 1083 { 1084 int err; 1085 1086 /* Enable ADC */ 1087 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01); 1088 if (err) 1089 return err; 1090 1091 /* Enable local temperature sensor */ 1092 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40); 1093 if (err) 1094 return err; 1095 1096 /* Enable Vcore and VCC voltage monitoring */ 1097 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03); 1098 } 1099 1100 static int nct7802_probe(struct i2c_client *client, 1101 const struct i2c_device_id *id) 1102 { 1103 struct device *dev = &client->dev; 1104 struct nct7802_data *data; 1105 struct device *hwmon_dev; 1106 int ret; 1107 1108 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 1109 if (data == NULL) 1110 return -ENOMEM; 1111 1112 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config); 1113 if (IS_ERR(data->regmap)) 1114 return PTR_ERR(data->regmap); 1115 1116 mutex_init(&data->access_lock); 1117 1118 ret = nct7802_init_chip(data); 1119 if (ret < 0) 1120 return ret; 1121 1122 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1123 data, 1124 nct7802_groups); 1125 return PTR_ERR_OR_ZERO(hwmon_dev); 1126 } 1127 1128 static const unsigned short nct7802_address_list[] = { 1129 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END 1130 }; 1131 1132 static const struct i2c_device_id nct7802_idtable[] = { 1133 { "nct7802", 0 }, 1134 { } 1135 }; 1136 MODULE_DEVICE_TABLE(i2c, nct7802_idtable); 1137 1138 static struct i2c_driver nct7802_driver = { 1139 .class = I2C_CLASS_HWMON, 1140 .driver = { 1141 .name = DRVNAME, 1142 }, 1143 .detect = nct7802_detect, 1144 .probe = nct7802_probe, 1145 .id_table = nct7802_idtable, 1146 .address_list = nct7802_address_list, 1147 }; 1148 1149 module_i2c_driver(nct7802_driver); 1150 1151 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 1152 MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver"); 1153 MODULE_LICENSE("GPL v2"); 1154