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