1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives 4 * Copyright (C) 2007-2008, Advanced Micro Devices, Inc. 5 * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net> 6 * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com> 7 * Copyright (C) 2009 Jean Delvare <jdelvare@suse.de> 8 * 9 * Derived from the lm83 driver by Jean Delvare 10 */ 11 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/slab.h> 15 #include <linux/i2c.h> 16 #include <linux/hwmon.h> 17 #include <linux/hwmon-sysfs.h> 18 #include <linux/hwmon-vid.h> 19 #include <linux/err.h> 20 #include <linux/jiffies.h> 21 #include <linux/of.h> 22 #include <linux/util_macros.h> 23 24 /* Indexes for the sysfs hooks */ 25 26 #define INPUT 0 27 #define MIN 1 28 #define MAX 2 29 #define CONTROL 3 30 #define OFFSET 3 31 #define AUTOMIN 4 32 #define THERM 5 33 #define HYSTERSIS 6 34 35 /* 36 * These are unique identifiers for the sysfs functions - unlike the 37 * numbers above, these are not also indexes into an array 38 */ 39 40 #define ALARM 9 41 #define FAULT 10 42 43 /* 7475 Common Registers */ 44 45 #define REG_DEVREV2 0x12 /* ADT7490 only */ 46 47 #define REG_VTT 0x1E /* ADT7490 only */ 48 #define REG_EXTEND3 0x1F /* ADT7490 only */ 49 50 #define REG_VOLTAGE_BASE 0x20 51 #define REG_TEMP_BASE 0x25 52 #define REG_TACH_BASE 0x28 53 #define REG_PWM_BASE 0x30 54 #define REG_PWM_MAX_BASE 0x38 55 56 #define REG_DEVID 0x3D 57 #define REG_VENDID 0x3E 58 #define REG_DEVID2 0x3F 59 60 #define REG_CONFIG1 0x40 61 62 #define REG_STATUS1 0x41 63 #define REG_STATUS2 0x42 64 65 #define REG_VID 0x43 /* ADT7476 only */ 66 67 #define REG_VOLTAGE_MIN_BASE 0x44 68 #define REG_VOLTAGE_MAX_BASE 0x45 69 70 #define REG_TEMP_MIN_BASE 0x4E 71 #define REG_TEMP_MAX_BASE 0x4F 72 73 #define REG_TACH_MIN_BASE 0x54 74 75 #define REG_PWM_CONFIG_BASE 0x5C 76 77 #define REG_TEMP_TRANGE_BASE 0x5F 78 79 #define REG_ENHANCE_ACOUSTICS1 0x62 80 #define REG_ENHANCE_ACOUSTICS2 0x63 81 82 #define REG_PWM_MIN_BASE 0x64 83 84 #define REG_TEMP_TMIN_BASE 0x67 85 #define REG_TEMP_THERM_BASE 0x6A 86 87 #define REG_REMOTE1_HYSTERSIS 0x6D 88 #define REG_REMOTE2_HYSTERSIS 0x6E 89 90 #define REG_TEMP_OFFSET_BASE 0x70 91 92 #define REG_CONFIG2 0x73 93 94 #define REG_EXTEND1 0x76 95 #define REG_EXTEND2 0x77 96 97 #define REG_CONFIG3 0x78 98 #define REG_CONFIG5 0x7C 99 #define REG_CONFIG4 0x7D 100 101 #define REG_STATUS4 0x81 /* ADT7490 only */ 102 103 #define REG_VTT_MIN 0x84 /* ADT7490 only */ 104 #define REG_VTT_MAX 0x86 /* ADT7490 only */ 105 106 #define VID_VIDSEL 0x80 /* ADT7476 only */ 107 108 #define CONFIG2_ATTN 0x20 109 110 #define CONFIG3_SMBALERT 0x01 111 #define CONFIG3_THERM 0x02 112 113 #define CONFIG4_PINFUNC 0x03 114 #define CONFIG4_THERM 0x01 115 #define CONFIG4_SMBALERT 0x02 116 #define CONFIG4_MAXDUTY 0x08 117 #define CONFIG4_ATTN_IN10 0x30 118 #define CONFIG4_ATTN_IN43 0xC0 119 120 #define CONFIG5_TWOSCOMP 0x01 121 #define CONFIG5_TEMPOFFSET 0x02 122 #define CONFIG5_VIDGPIO 0x10 /* ADT7476 only */ 123 124 /* ADT7475 Settings */ 125 126 #define ADT7475_VOLTAGE_COUNT 5 /* Not counting Vtt */ 127 #define ADT7475_TEMP_COUNT 3 128 #define ADT7475_TACH_COUNT 4 129 #define ADT7475_PWM_COUNT 3 130 131 /* Macro to read the registers */ 132 133 #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg)) 134 135 /* Macros to easily index the registers */ 136 137 #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2)) 138 #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2)) 139 140 #define PWM_REG(idx) (REG_PWM_BASE + (idx)) 141 #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx)) 142 #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx)) 143 #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx)) 144 145 #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx)) 146 #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2)) 147 #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2)) 148 149 #define TEMP_REG(idx) (REG_TEMP_BASE + (idx)) 150 #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2)) 151 #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2)) 152 #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx)) 153 #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx)) 154 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx)) 155 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx)) 156 157 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; 158 159 enum chips { adt7473, adt7475, adt7476, adt7490 }; 160 161 static const struct i2c_device_id adt7475_id[] = { 162 { "adt7473", adt7473 }, 163 { "adt7475", adt7475 }, 164 { "adt7476", adt7476 }, 165 { "adt7490", adt7490 }, 166 { } 167 }; 168 MODULE_DEVICE_TABLE(i2c, adt7475_id); 169 170 static const struct of_device_id __maybe_unused adt7475_of_match[] = { 171 { 172 .compatible = "adi,adt7473", 173 .data = (void *)adt7473 174 }, 175 { 176 .compatible = "adi,adt7475", 177 .data = (void *)adt7475 178 }, 179 { 180 .compatible = "adi,adt7476", 181 .data = (void *)adt7476 182 }, 183 { 184 .compatible = "adi,adt7490", 185 .data = (void *)adt7490 186 }, 187 { }, 188 }; 189 MODULE_DEVICE_TABLE(of, adt7475_of_match); 190 191 struct adt7475_data { 192 struct i2c_client *client; 193 struct mutex lock; 194 195 unsigned long measure_updated; 196 bool valid; 197 198 u8 config2; 199 u8 config4; 200 u8 config5; 201 u8 has_voltage; 202 u8 bypass_attn; /* Bypass voltage attenuator */ 203 u8 has_pwm2:1; 204 u8 has_fan4:1; 205 u8 has_vid:1; 206 u32 alarms; 207 u16 voltage[3][6]; 208 u16 temp[7][3]; 209 u16 tach[2][4]; 210 u8 pwm[4][3]; 211 u8 range[3]; 212 u8 pwmctl[3]; 213 u8 pwmchan[3]; 214 u8 enh_acoustics[2]; 215 216 u8 vid; 217 u8 vrm; 218 const struct attribute_group *groups[9]; 219 }; 220 221 static struct i2c_driver adt7475_driver; 222 static struct adt7475_data *adt7475_update_device(struct device *dev); 223 static void adt7475_read_hystersis(struct i2c_client *client); 224 static void adt7475_read_pwm(struct i2c_client *client, int index); 225 226 /* Given a temp value, convert it to register value */ 227 228 static inline u16 temp2reg(struct adt7475_data *data, long val) 229 { 230 u16 ret; 231 232 if (!(data->config5 & CONFIG5_TWOSCOMP)) { 233 val = clamp_val(val, -64000, 191000); 234 ret = (val + 64500) / 1000; 235 } else { 236 val = clamp_val(val, -128000, 127000); 237 if (val < -500) 238 ret = (256500 + val) / 1000; 239 else 240 ret = (val + 500) / 1000; 241 } 242 243 return ret << 2; 244 } 245 246 /* Given a register value, convert it to a real temp value */ 247 248 static inline int reg2temp(struct adt7475_data *data, u16 reg) 249 { 250 if (data->config5 & CONFIG5_TWOSCOMP) { 251 if (reg >= 512) 252 return (reg - 1024) * 250; 253 else 254 return reg * 250; 255 } else 256 return (reg - 256) * 250; 257 } 258 259 static inline int tach2rpm(u16 tach) 260 { 261 if (tach == 0 || tach == 0xFFFF) 262 return 0; 263 264 return (90000 * 60) / tach; 265 } 266 267 static inline u16 rpm2tach(unsigned long rpm) 268 { 269 if (rpm == 0) 270 return 0; 271 272 return clamp_val((90000 * 60) / rpm, 1, 0xFFFF); 273 } 274 275 /* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */ 276 static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = { 277 { 45, 94 }, /* +2.5V */ 278 { 175, 525 }, /* Vccp */ 279 { 68, 71 }, /* Vcc */ 280 { 93, 47 }, /* +5V */ 281 { 120, 20 }, /* +12V */ 282 { 45, 45 }, /* Vtt */ 283 }; 284 285 static inline int reg2volt(int channel, u16 reg, u8 bypass_attn) 286 { 287 const int *r = adt7473_in_scaling[channel]; 288 289 if (bypass_attn & (1 << channel)) 290 return DIV_ROUND_CLOSEST(reg * 2250, 1024); 291 return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024); 292 } 293 294 static inline u16 volt2reg(int channel, long volt, u8 bypass_attn) 295 { 296 const int *r = adt7473_in_scaling[channel]; 297 long reg; 298 299 if (bypass_attn & (1 << channel)) 300 reg = DIV_ROUND_CLOSEST(volt * 1024, 2250); 301 else 302 reg = DIV_ROUND_CLOSEST(volt * r[1] * 1024, 303 (r[0] + r[1]) * 2250); 304 return clamp_val(reg, 0, 1023) & (0xff << 2); 305 } 306 307 static int adt7475_read_word(struct i2c_client *client, int reg) 308 { 309 int val1, val2; 310 311 val1 = i2c_smbus_read_byte_data(client, reg); 312 if (val1 < 0) 313 return val1; 314 val2 = i2c_smbus_read_byte_data(client, reg + 1); 315 if (val2 < 0) 316 return val2; 317 318 return val1 | (val2 << 8); 319 } 320 321 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val) 322 { 323 i2c_smbus_write_byte_data(client, reg + 1, val >> 8); 324 i2c_smbus_write_byte_data(client, reg, val & 0xFF); 325 } 326 327 static ssize_t voltage_show(struct device *dev, struct device_attribute *attr, 328 char *buf) 329 { 330 struct adt7475_data *data = adt7475_update_device(dev); 331 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 332 unsigned short val; 333 334 if (IS_ERR(data)) 335 return PTR_ERR(data); 336 337 switch (sattr->nr) { 338 case ALARM: 339 return sprintf(buf, "%d\n", 340 (data->alarms >> sattr->index) & 1); 341 default: 342 val = data->voltage[sattr->nr][sattr->index]; 343 return sprintf(buf, "%d\n", 344 reg2volt(sattr->index, val, data->bypass_attn)); 345 } 346 } 347 348 static ssize_t voltage_store(struct device *dev, 349 struct device_attribute *attr, const char *buf, 350 size_t count) 351 { 352 353 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 354 struct adt7475_data *data = dev_get_drvdata(dev); 355 struct i2c_client *client = data->client; 356 unsigned char reg; 357 long val; 358 359 if (kstrtol(buf, 10, &val)) 360 return -EINVAL; 361 362 mutex_lock(&data->lock); 363 364 data->voltage[sattr->nr][sattr->index] = 365 volt2reg(sattr->index, val, data->bypass_attn); 366 367 if (sattr->index < ADT7475_VOLTAGE_COUNT) { 368 if (sattr->nr == MIN) 369 reg = VOLTAGE_MIN_REG(sattr->index); 370 else 371 reg = VOLTAGE_MAX_REG(sattr->index); 372 } else { 373 if (sattr->nr == MIN) 374 reg = REG_VTT_MIN; 375 else 376 reg = REG_VTT_MAX; 377 } 378 379 i2c_smbus_write_byte_data(client, reg, 380 data->voltage[sattr->nr][sattr->index] >> 2); 381 mutex_unlock(&data->lock); 382 383 return count; 384 } 385 386 static ssize_t temp_show(struct device *dev, struct device_attribute *attr, 387 char *buf) 388 { 389 struct adt7475_data *data = adt7475_update_device(dev); 390 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 391 int out; 392 393 if (IS_ERR(data)) 394 return PTR_ERR(data); 395 396 switch (sattr->nr) { 397 case HYSTERSIS: 398 mutex_lock(&data->lock); 399 out = data->temp[sattr->nr][sattr->index]; 400 if (sattr->index != 1) 401 out = (out >> 4) & 0xF; 402 else 403 out = (out & 0xF); 404 /* 405 * Show the value as an absolute number tied to 406 * THERM 407 */ 408 out = reg2temp(data, data->temp[THERM][sattr->index]) - 409 out * 1000; 410 mutex_unlock(&data->lock); 411 break; 412 413 case OFFSET: 414 /* 415 * Offset is always 2's complement, regardless of the 416 * setting in CONFIG5 417 */ 418 mutex_lock(&data->lock); 419 out = (s8)data->temp[sattr->nr][sattr->index]; 420 if (data->config5 & CONFIG5_TEMPOFFSET) 421 out *= 1000; 422 else 423 out *= 500; 424 mutex_unlock(&data->lock); 425 break; 426 427 case ALARM: 428 out = (data->alarms >> (sattr->index + 4)) & 1; 429 break; 430 431 case FAULT: 432 /* Note - only for remote1 and remote2 */ 433 out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000)); 434 break; 435 436 default: 437 /* All other temp values are in the configured format */ 438 out = reg2temp(data, data->temp[sattr->nr][sattr->index]); 439 } 440 441 return sprintf(buf, "%d\n", out); 442 } 443 444 static ssize_t temp_store(struct device *dev, struct device_attribute *attr, 445 const char *buf, size_t count) 446 { 447 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 448 struct adt7475_data *data = dev_get_drvdata(dev); 449 struct i2c_client *client = data->client; 450 unsigned char reg = 0; 451 u8 out; 452 int temp; 453 long val; 454 455 if (kstrtol(buf, 10, &val)) 456 return -EINVAL; 457 458 mutex_lock(&data->lock); 459 460 /* We need the config register in all cases for temp <-> reg conv. */ 461 data->config5 = adt7475_read(REG_CONFIG5); 462 463 switch (sattr->nr) { 464 case OFFSET: 465 if (data->config5 & CONFIG5_TEMPOFFSET) { 466 val = clamp_val(val, -63000, 127000); 467 out = data->temp[OFFSET][sattr->index] = val / 1000; 468 } else { 469 val = clamp_val(val, -63000, 64000); 470 out = data->temp[OFFSET][sattr->index] = val / 500; 471 } 472 break; 473 474 case HYSTERSIS: 475 /* 476 * The value will be given as an absolute value, turn it 477 * into an offset based on THERM 478 */ 479 480 /* Read fresh THERM and HYSTERSIS values from the chip */ 481 data->temp[THERM][sattr->index] = 482 adt7475_read(TEMP_THERM_REG(sattr->index)) << 2; 483 adt7475_read_hystersis(client); 484 485 temp = reg2temp(data, data->temp[THERM][sattr->index]); 486 val = clamp_val(val, temp - 15000, temp); 487 val = (temp - val) / 1000; 488 489 if (sattr->index != 1) { 490 data->temp[HYSTERSIS][sattr->index] &= 0x0F; 491 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4; 492 } else { 493 data->temp[HYSTERSIS][sattr->index] &= 0xF0; 494 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF); 495 } 496 497 out = data->temp[HYSTERSIS][sattr->index]; 498 break; 499 500 default: 501 data->temp[sattr->nr][sattr->index] = temp2reg(data, val); 502 503 /* 504 * We maintain an extra 2 digits of precision for simplicity 505 * - shift those back off before writing the value 506 */ 507 out = (u8) (data->temp[sattr->nr][sattr->index] >> 2); 508 } 509 510 switch (sattr->nr) { 511 case MIN: 512 reg = TEMP_MIN_REG(sattr->index); 513 break; 514 case MAX: 515 reg = TEMP_MAX_REG(sattr->index); 516 break; 517 case OFFSET: 518 reg = TEMP_OFFSET_REG(sattr->index); 519 break; 520 case AUTOMIN: 521 reg = TEMP_TMIN_REG(sattr->index); 522 break; 523 case THERM: 524 reg = TEMP_THERM_REG(sattr->index); 525 break; 526 case HYSTERSIS: 527 if (sattr->index != 2) 528 reg = REG_REMOTE1_HYSTERSIS; 529 else 530 reg = REG_REMOTE2_HYSTERSIS; 531 532 break; 533 } 534 535 i2c_smbus_write_byte_data(client, reg, out); 536 537 mutex_unlock(&data->lock); 538 return count; 539 } 540 541 /* Assuming CONFIG6[SLOW] is 0 */ 542 static const int ad7475_st_map[] = { 543 37500, 18800, 12500, 7500, 4700, 3100, 1600, 800, 544 }; 545 546 static ssize_t temp_st_show(struct device *dev, struct device_attribute *attr, 547 char *buf) 548 { 549 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 550 struct adt7475_data *data = dev_get_drvdata(dev); 551 long val; 552 553 switch (sattr->index) { 554 case 0: 555 val = data->enh_acoustics[0] & 0xf; 556 break; 557 case 1: 558 val = data->enh_acoustics[1] & 0xf; 559 break; 560 case 2: 561 default: 562 val = (data->enh_acoustics[1] >> 4) & 0xf; 563 break; 564 } 565 566 if (val & 0x8) 567 return sprintf(buf, "%d\n", ad7475_st_map[val & 0x7]); 568 else 569 return sprintf(buf, "0\n"); 570 } 571 572 static ssize_t temp_st_store(struct device *dev, 573 struct device_attribute *attr, const char *buf, 574 size_t count) 575 { 576 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 577 struct adt7475_data *data = dev_get_drvdata(dev); 578 struct i2c_client *client = data->client; 579 unsigned char reg; 580 int shift, idx; 581 ulong val; 582 583 if (kstrtoul(buf, 10, &val)) 584 return -EINVAL; 585 586 switch (sattr->index) { 587 case 0: 588 reg = REG_ENHANCE_ACOUSTICS1; 589 shift = 0; 590 idx = 0; 591 break; 592 case 1: 593 reg = REG_ENHANCE_ACOUSTICS2; 594 shift = 0; 595 idx = 1; 596 break; 597 case 2: 598 default: 599 reg = REG_ENHANCE_ACOUSTICS2; 600 shift = 4; 601 idx = 1; 602 break; 603 } 604 605 if (val > 0) { 606 val = find_closest_descending(val, ad7475_st_map, 607 ARRAY_SIZE(ad7475_st_map)); 608 val |= 0x8; 609 } 610 611 mutex_lock(&data->lock); 612 613 data->enh_acoustics[idx] &= ~(0xf << shift); 614 data->enh_acoustics[idx] |= (val << shift); 615 616 i2c_smbus_write_byte_data(client, reg, data->enh_acoustics[idx]); 617 618 mutex_unlock(&data->lock); 619 620 return count; 621 } 622 623 /* 624 * Table of autorange values - the user will write the value in millidegrees, 625 * and we'll convert it 626 */ 627 static const int autorange_table[] = { 628 2000, 2500, 3330, 4000, 5000, 6670, 8000, 629 10000, 13330, 16000, 20000, 26670, 32000, 40000, 630 53330, 80000 631 }; 632 633 static ssize_t point2_show(struct device *dev, struct device_attribute *attr, 634 char *buf) 635 { 636 struct adt7475_data *data = adt7475_update_device(dev); 637 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 638 int out, val; 639 640 if (IS_ERR(data)) 641 return PTR_ERR(data); 642 643 mutex_lock(&data->lock); 644 out = (data->range[sattr->index] >> 4) & 0x0F; 645 val = reg2temp(data, data->temp[AUTOMIN][sattr->index]); 646 mutex_unlock(&data->lock); 647 648 return sprintf(buf, "%d\n", val + autorange_table[out]); 649 } 650 651 static ssize_t point2_store(struct device *dev, struct device_attribute *attr, 652 const char *buf, size_t count) 653 { 654 struct adt7475_data *data = dev_get_drvdata(dev); 655 struct i2c_client *client = data->client; 656 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 657 int temp; 658 long val; 659 660 if (kstrtol(buf, 10, &val)) 661 return -EINVAL; 662 663 mutex_lock(&data->lock); 664 665 /* Get a fresh copy of the needed registers */ 666 data->config5 = adt7475_read(REG_CONFIG5); 667 data->temp[AUTOMIN][sattr->index] = 668 adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2; 669 data->range[sattr->index] = 670 adt7475_read(TEMP_TRANGE_REG(sattr->index)); 671 672 /* 673 * The user will write an absolute value, so subtract the start point 674 * to figure the range 675 */ 676 temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]); 677 val = clamp_val(val, temp + autorange_table[0], 678 temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]); 679 val -= temp; 680 681 /* Find the nearest table entry to what the user wrote */ 682 val = find_closest(val, autorange_table, ARRAY_SIZE(autorange_table)); 683 684 data->range[sattr->index] &= ~0xF0; 685 data->range[sattr->index] |= val << 4; 686 687 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index), 688 data->range[sattr->index]); 689 690 mutex_unlock(&data->lock); 691 return count; 692 } 693 694 static ssize_t tach_show(struct device *dev, struct device_attribute *attr, 695 char *buf) 696 { 697 struct adt7475_data *data = adt7475_update_device(dev); 698 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 699 int out; 700 701 if (IS_ERR(data)) 702 return PTR_ERR(data); 703 704 if (sattr->nr == ALARM) 705 out = (data->alarms >> (sattr->index + 10)) & 1; 706 else 707 out = tach2rpm(data->tach[sattr->nr][sattr->index]); 708 709 return sprintf(buf, "%d\n", out); 710 } 711 712 static ssize_t tach_store(struct device *dev, struct device_attribute *attr, 713 const char *buf, size_t count) 714 { 715 716 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 717 struct adt7475_data *data = dev_get_drvdata(dev); 718 struct i2c_client *client = data->client; 719 unsigned long val; 720 721 if (kstrtoul(buf, 10, &val)) 722 return -EINVAL; 723 724 mutex_lock(&data->lock); 725 726 data->tach[MIN][sattr->index] = rpm2tach(val); 727 728 adt7475_write_word(client, TACH_MIN_REG(sattr->index), 729 data->tach[MIN][sattr->index]); 730 731 mutex_unlock(&data->lock); 732 return count; 733 } 734 735 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr, 736 char *buf) 737 { 738 struct adt7475_data *data = adt7475_update_device(dev); 739 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 740 741 if (IS_ERR(data)) 742 return PTR_ERR(data); 743 744 return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]); 745 } 746 747 static ssize_t pwmchan_show(struct device *dev, struct device_attribute *attr, 748 char *buf) 749 { 750 struct adt7475_data *data = adt7475_update_device(dev); 751 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 752 753 if (IS_ERR(data)) 754 return PTR_ERR(data); 755 756 return sprintf(buf, "%d\n", data->pwmchan[sattr->index]); 757 } 758 759 static ssize_t pwmctrl_show(struct device *dev, struct device_attribute *attr, 760 char *buf) 761 { 762 struct adt7475_data *data = adt7475_update_device(dev); 763 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 764 765 if (IS_ERR(data)) 766 return PTR_ERR(data); 767 768 return sprintf(buf, "%d\n", data->pwmctl[sattr->index]); 769 } 770 771 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr, 772 const char *buf, size_t count) 773 { 774 775 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 776 struct adt7475_data *data = dev_get_drvdata(dev); 777 struct i2c_client *client = data->client; 778 unsigned char reg = 0; 779 long val; 780 781 if (kstrtol(buf, 10, &val)) 782 return -EINVAL; 783 784 mutex_lock(&data->lock); 785 786 switch (sattr->nr) { 787 case INPUT: 788 /* Get a fresh value for CONTROL */ 789 data->pwm[CONTROL][sattr->index] = 790 adt7475_read(PWM_CONFIG_REG(sattr->index)); 791 792 /* 793 * If we are not in manual mode, then we shouldn't allow 794 * the user to set the pwm speed 795 */ 796 if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) { 797 mutex_unlock(&data->lock); 798 return count; 799 } 800 801 reg = PWM_REG(sattr->index); 802 break; 803 804 case MIN: 805 reg = PWM_MIN_REG(sattr->index); 806 break; 807 808 case MAX: 809 reg = PWM_MAX_REG(sattr->index); 810 break; 811 } 812 813 data->pwm[sattr->nr][sattr->index] = clamp_val(val, 0, 0xFF); 814 i2c_smbus_write_byte_data(client, reg, 815 data->pwm[sattr->nr][sattr->index]); 816 mutex_unlock(&data->lock); 817 818 return count; 819 } 820 821 static ssize_t stall_disable_show(struct device *dev, 822 struct device_attribute *attr, char *buf) 823 { 824 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 825 struct adt7475_data *data = dev_get_drvdata(dev); 826 827 u8 mask = BIT(5 + sattr->index); 828 829 return sprintf(buf, "%d\n", !!(data->enh_acoustics[0] & mask)); 830 } 831 832 static ssize_t stall_disable_store(struct device *dev, 833 struct device_attribute *attr, 834 const char *buf, size_t count) 835 { 836 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 837 struct adt7475_data *data = dev_get_drvdata(dev); 838 struct i2c_client *client = data->client; 839 long val; 840 u8 mask = BIT(5 + sattr->index); 841 842 if (kstrtol(buf, 10, &val)) 843 return -EINVAL; 844 845 mutex_lock(&data->lock); 846 847 data->enh_acoustics[0] &= ~mask; 848 if (val) 849 data->enh_acoustics[0] |= mask; 850 851 i2c_smbus_write_byte_data(client, REG_ENHANCE_ACOUSTICS1, 852 data->enh_acoustics[0]); 853 854 mutex_unlock(&data->lock); 855 856 return count; 857 } 858 859 /* Called by set_pwmctrl and set_pwmchan */ 860 861 static int hw_set_pwm(struct i2c_client *client, int index, 862 unsigned int pwmctl, unsigned int pwmchan) 863 { 864 struct adt7475_data *data = i2c_get_clientdata(client); 865 long val = 0; 866 867 switch (pwmctl) { 868 case 0: 869 val = 0x03; /* Run at full speed */ 870 break; 871 case 1: 872 val = 0x07; /* Manual mode */ 873 break; 874 case 2: 875 switch (pwmchan) { 876 case 1: 877 /* Remote1 controls PWM */ 878 val = 0x00; 879 break; 880 case 2: 881 /* local controls PWM */ 882 val = 0x01; 883 break; 884 case 4: 885 /* remote2 controls PWM */ 886 val = 0x02; 887 break; 888 case 6: 889 /* local/remote2 control PWM */ 890 val = 0x05; 891 break; 892 case 7: 893 /* All three control PWM */ 894 val = 0x06; 895 break; 896 default: 897 return -EINVAL; 898 } 899 break; 900 default: 901 return -EINVAL; 902 } 903 904 data->pwmctl[index] = pwmctl; 905 data->pwmchan[index] = pwmchan; 906 907 data->pwm[CONTROL][index] &= ~0xE0; 908 data->pwm[CONTROL][index] |= (val & 7) << 5; 909 910 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index), 911 data->pwm[CONTROL][index]); 912 913 return 0; 914 } 915 916 static ssize_t pwmchan_store(struct device *dev, 917 struct device_attribute *attr, const char *buf, 918 size_t count) 919 { 920 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 921 struct adt7475_data *data = dev_get_drvdata(dev); 922 struct i2c_client *client = data->client; 923 int r; 924 long val; 925 926 if (kstrtol(buf, 10, &val)) 927 return -EINVAL; 928 929 mutex_lock(&data->lock); 930 /* Read Modify Write PWM values */ 931 adt7475_read_pwm(client, sattr->index); 932 r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val); 933 if (r) 934 count = r; 935 mutex_unlock(&data->lock); 936 937 return count; 938 } 939 940 static ssize_t pwmctrl_store(struct device *dev, 941 struct device_attribute *attr, const char *buf, 942 size_t count) 943 { 944 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 945 struct adt7475_data *data = dev_get_drvdata(dev); 946 struct i2c_client *client = data->client; 947 int r; 948 long val; 949 950 if (kstrtol(buf, 10, &val)) 951 return -EINVAL; 952 953 mutex_lock(&data->lock); 954 /* Read Modify Write PWM values */ 955 adt7475_read_pwm(client, sattr->index); 956 r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]); 957 if (r) 958 count = r; 959 mutex_unlock(&data->lock); 960 961 return count; 962 } 963 964 /* List of frequencies for the PWM */ 965 static const int pwmfreq_table[] = { 966 11, 14, 22, 29, 35, 44, 58, 88, 22500 967 }; 968 969 static ssize_t pwmfreq_show(struct device *dev, struct device_attribute *attr, 970 char *buf) 971 { 972 struct adt7475_data *data = adt7475_update_device(dev); 973 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 974 int idx; 975 976 if (IS_ERR(data)) 977 return PTR_ERR(data); 978 idx = clamp_val(data->range[sattr->index] & 0xf, 0, 979 ARRAY_SIZE(pwmfreq_table) - 1); 980 981 return sprintf(buf, "%d\n", pwmfreq_table[idx]); 982 } 983 984 static ssize_t pwmfreq_store(struct device *dev, 985 struct device_attribute *attr, const char *buf, 986 size_t count) 987 { 988 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); 989 struct adt7475_data *data = dev_get_drvdata(dev); 990 struct i2c_client *client = data->client; 991 int out; 992 long val; 993 994 if (kstrtol(buf, 10, &val)) 995 return -EINVAL; 996 997 out = find_closest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table)); 998 999 mutex_lock(&data->lock); 1000 1001 data->range[sattr->index] = 1002 adt7475_read(TEMP_TRANGE_REG(sattr->index)); 1003 data->range[sattr->index] &= ~0xf; 1004 data->range[sattr->index] |= out; 1005 1006 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index), 1007 data->range[sattr->index]); 1008 1009 mutex_unlock(&data->lock); 1010 return count; 1011 } 1012 1013 static ssize_t pwm_use_point2_pwm_at_crit_show(struct device *dev, 1014 struct device_attribute *devattr, 1015 char *buf) 1016 { 1017 struct adt7475_data *data = adt7475_update_device(dev); 1018 1019 if (IS_ERR(data)) 1020 return PTR_ERR(data); 1021 1022 return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY)); 1023 } 1024 1025 static ssize_t pwm_use_point2_pwm_at_crit_store(struct device *dev, 1026 struct device_attribute *devattr, 1027 const char *buf, size_t count) 1028 { 1029 struct adt7475_data *data = dev_get_drvdata(dev); 1030 struct i2c_client *client = data->client; 1031 long val; 1032 1033 if (kstrtol(buf, 10, &val)) 1034 return -EINVAL; 1035 if (val != 0 && val != 1) 1036 return -EINVAL; 1037 1038 mutex_lock(&data->lock); 1039 data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4); 1040 if (val) 1041 data->config4 |= CONFIG4_MAXDUTY; 1042 else 1043 data->config4 &= ~CONFIG4_MAXDUTY; 1044 i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4); 1045 mutex_unlock(&data->lock); 1046 1047 return count; 1048 } 1049 1050 static ssize_t vrm_show(struct device *dev, struct device_attribute *devattr, 1051 char *buf) 1052 { 1053 struct adt7475_data *data = dev_get_drvdata(dev); 1054 return sprintf(buf, "%d\n", (int)data->vrm); 1055 } 1056 1057 static ssize_t vrm_store(struct device *dev, struct device_attribute *devattr, 1058 const char *buf, size_t count) 1059 { 1060 struct adt7475_data *data = dev_get_drvdata(dev); 1061 long val; 1062 1063 if (kstrtol(buf, 10, &val)) 1064 return -EINVAL; 1065 if (val < 0 || val > 255) 1066 return -EINVAL; 1067 data->vrm = val; 1068 1069 return count; 1070 } 1071 1072 static ssize_t cpu0_vid_show(struct device *dev, 1073 struct device_attribute *devattr, char *buf) 1074 { 1075 struct adt7475_data *data = adt7475_update_device(dev); 1076 1077 if (IS_ERR(data)) 1078 return PTR_ERR(data); 1079 1080 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 1081 } 1082 1083 static SENSOR_DEVICE_ATTR_2_RO(in0_input, voltage, INPUT, 0); 1084 static SENSOR_DEVICE_ATTR_2_RW(in0_max, voltage, MAX, 0); 1085 static SENSOR_DEVICE_ATTR_2_RW(in0_min, voltage, MIN, 0); 1086 static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, voltage, ALARM, 0); 1087 static SENSOR_DEVICE_ATTR_2_RO(in1_input, voltage, INPUT, 1); 1088 static SENSOR_DEVICE_ATTR_2_RW(in1_max, voltage, MAX, 1); 1089 static SENSOR_DEVICE_ATTR_2_RW(in1_min, voltage, MIN, 1); 1090 static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, voltage, ALARM, 1); 1091 static SENSOR_DEVICE_ATTR_2_RO(in2_input, voltage, INPUT, 2); 1092 static SENSOR_DEVICE_ATTR_2_RW(in2_max, voltage, MAX, 2); 1093 static SENSOR_DEVICE_ATTR_2_RW(in2_min, voltage, MIN, 2); 1094 static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, voltage, ALARM, 2); 1095 static SENSOR_DEVICE_ATTR_2_RO(in3_input, voltage, INPUT, 3); 1096 static SENSOR_DEVICE_ATTR_2_RW(in3_max, voltage, MAX, 3); 1097 static SENSOR_DEVICE_ATTR_2_RW(in3_min, voltage, MIN, 3); 1098 static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, voltage, ALARM, 3); 1099 static SENSOR_DEVICE_ATTR_2_RO(in4_input, voltage, INPUT, 4); 1100 static SENSOR_DEVICE_ATTR_2_RW(in4_max, voltage, MAX, 4); 1101 static SENSOR_DEVICE_ATTR_2_RW(in4_min, voltage, MIN, 4); 1102 static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, voltage, ALARM, 8); 1103 static SENSOR_DEVICE_ATTR_2_RO(in5_input, voltage, INPUT, 5); 1104 static SENSOR_DEVICE_ATTR_2_RW(in5_max, voltage, MAX, 5); 1105 static SENSOR_DEVICE_ATTR_2_RW(in5_min, voltage, MIN, 5); 1106 static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, voltage, ALARM, 31); 1107 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, INPUT, 0); 1108 static SENSOR_DEVICE_ATTR_2_RO(temp1_alarm, temp, ALARM, 0); 1109 static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, temp, FAULT, 0); 1110 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, MAX, 0); 1111 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, MIN, 0); 1112 static SENSOR_DEVICE_ATTR_2_RW(temp1_offset, temp, OFFSET, 0); 1113 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point1_temp, temp, AUTOMIN, 0); 1114 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, point2, 0, 0); 1115 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, THERM, 0); 1116 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit_hyst, temp, HYSTERSIS, 0); 1117 static SENSOR_DEVICE_ATTR_2_RW(temp1_smoothing, temp_st, 0, 0); 1118 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, INPUT, 1); 1119 static SENSOR_DEVICE_ATTR_2_RO(temp2_alarm, temp, ALARM, 1); 1120 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, MAX, 1); 1121 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, MIN, 1); 1122 static SENSOR_DEVICE_ATTR_2_RW(temp2_offset, temp, OFFSET, 1); 1123 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp, AUTOMIN, 1); 1124 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, point2, 0, 1); 1125 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, THERM, 1); 1126 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit_hyst, temp, HYSTERSIS, 1); 1127 static SENSOR_DEVICE_ATTR_2_RW(temp2_smoothing, temp_st, 0, 1); 1128 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, INPUT, 2); 1129 static SENSOR_DEVICE_ATTR_2_RO(temp3_alarm, temp, ALARM, 2); 1130 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, temp, FAULT, 2); 1131 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, MAX, 2); 1132 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, MIN, 2); 1133 static SENSOR_DEVICE_ATTR_2_RW(temp3_offset, temp, OFFSET, 2); 1134 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point1_temp, temp, AUTOMIN, 2); 1135 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point2_temp, point2, 0, 2); 1136 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, THERM, 2); 1137 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit_hyst, temp, HYSTERSIS, 2); 1138 static SENSOR_DEVICE_ATTR_2_RW(temp3_smoothing, temp_st, 0, 2); 1139 static SENSOR_DEVICE_ATTR_2_RO(fan1_input, tach, INPUT, 0); 1140 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, tach, MIN, 0); 1141 static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, tach, ALARM, 0); 1142 static SENSOR_DEVICE_ATTR_2_RO(fan2_input, tach, INPUT, 1); 1143 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, tach, MIN, 1); 1144 static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, tach, ALARM, 1); 1145 static SENSOR_DEVICE_ATTR_2_RO(fan3_input, tach, INPUT, 2); 1146 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, tach, MIN, 2); 1147 static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, tach, ALARM, 2); 1148 static SENSOR_DEVICE_ATTR_2_RO(fan4_input, tach, INPUT, 3); 1149 static SENSOR_DEVICE_ATTR_2_RW(fan4_min, tach, MIN, 3); 1150 static SENSOR_DEVICE_ATTR_2_RO(fan4_alarm, tach, ALARM, 3); 1151 static SENSOR_DEVICE_ATTR_2_RW(pwm1, pwm, INPUT, 0); 1152 static SENSOR_DEVICE_ATTR_2_RW(pwm1_freq, pwmfreq, INPUT, 0); 1153 static SENSOR_DEVICE_ATTR_2_RW(pwm1_enable, pwmctrl, INPUT, 0); 1154 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_channels_temp, pwmchan, INPUT, 0); 1155 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_pwm, pwm, MIN, 0); 1156 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_pwm, pwm, MAX, 0); 1157 static SENSOR_DEVICE_ATTR_2_RW(pwm1_stall_disable, stall_disable, 0, 0); 1158 static SENSOR_DEVICE_ATTR_2_RW(pwm2, pwm, INPUT, 1); 1159 static SENSOR_DEVICE_ATTR_2_RW(pwm2_freq, pwmfreq, INPUT, 1); 1160 static SENSOR_DEVICE_ATTR_2_RW(pwm2_enable, pwmctrl, INPUT, 1); 1161 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_channels_temp, pwmchan, INPUT, 1); 1162 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_pwm, pwm, MIN, 1); 1163 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_pwm, pwm, MAX, 1); 1164 static SENSOR_DEVICE_ATTR_2_RW(pwm2_stall_disable, stall_disable, 0, 1); 1165 static SENSOR_DEVICE_ATTR_2_RW(pwm3, pwm, INPUT, 2); 1166 static SENSOR_DEVICE_ATTR_2_RW(pwm3_freq, pwmfreq, INPUT, 2); 1167 static SENSOR_DEVICE_ATTR_2_RW(pwm3_enable, pwmctrl, INPUT, 2); 1168 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_channels_temp, pwmchan, INPUT, 2); 1169 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_pwm, pwm, MIN, 2); 1170 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_pwm, pwm, MAX, 2); 1171 static SENSOR_DEVICE_ATTR_2_RW(pwm3_stall_disable, stall_disable, 0, 2); 1172 1173 /* Non-standard name, might need revisiting */ 1174 static DEVICE_ATTR_RW(pwm_use_point2_pwm_at_crit); 1175 1176 static DEVICE_ATTR_RW(vrm); 1177 static DEVICE_ATTR_RO(cpu0_vid); 1178 1179 static struct attribute *adt7475_attrs[] = { 1180 &sensor_dev_attr_in1_input.dev_attr.attr, 1181 &sensor_dev_attr_in1_max.dev_attr.attr, 1182 &sensor_dev_attr_in1_min.dev_attr.attr, 1183 &sensor_dev_attr_in1_alarm.dev_attr.attr, 1184 &sensor_dev_attr_in2_input.dev_attr.attr, 1185 &sensor_dev_attr_in2_max.dev_attr.attr, 1186 &sensor_dev_attr_in2_min.dev_attr.attr, 1187 &sensor_dev_attr_in2_alarm.dev_attr.attr, 1188 &sensor_dev_attr_temp1_input.dev_attr.attr, 1189 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 1190 &sensor_dev_attr_temp1_fault.dev_attr.attr, 1191 &sensor_dev_attr_temp1_max.dev_attr.attr, 1192 &sensor_dev_attr_temp1_min.dev_attr.attr, 1193 &sensor_dev_attr_temp1_offset.dev_attr.attr, 1194 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, 1195 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, 1196 &sensor_dev_attr_temp1_crit.dev_attr.attr, 1197 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, 1198 &sensor_dev_attr_temp1_smoothing.dev_attr.attr, 1199 &sensor_dev_attr_temp2_input.dev_attr.attr, 1200 &sensor_dev_attr_temp2_alarm.dev_attr.attr, 1201 &sensor_dev_attr_temp2_max.dev_attr.attr, 1202 &sensor_dev_attr_temp2_min.dev_attr.attr, 1203 &sensor_dev_attr_temp2_offset.dev_attr.attr, 1204 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr, 1205 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, 1206 &sensor_dev_attr_temp2_crit.dev_attr.attr, 1207 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, 1208 &sensor_dev_attr_temp2_smoothing.dev_attr.attr, 1209 &sensor_dev_attr_temp3_input.dev_attr.attr, 1210 &sensor_dev_attr_temp3_fault.dev_attr.attr, 1211 &sensor_dev_attr_temp3_alarm.dev_attr.attr, 1212 &sensor_dev_attr_temp3_max.dev_attr.attr, 1213 &sensor_dev_attr_temp3_min.dev_attr.attr, 1214 &sensor_dev_attr_temp3_offset.dev_attr.attr, 1215 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr, 1216 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr, 1217 &sensor_dev_attr_temp3_crit.dev_attr.attr, 1218 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, 1219 &sensor_dev_attr_temp3_smoothing.dev_attr.attr, 1220 &sensor_dev_attr_fan1_input.dev_attr.attr, 1221 &sensor_dev_attr_fan1_min.dev_attr.attr, 1222 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 1223 &sensor_dev_attr_fan2_input.dev_attr.attr, 1224 &sensor_dev_attr_fan2_min.dev_attr.attr, 1225 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 1226 &sensor_dev_attr_fan3_input.dev_attr.attr, 1227 &sensor_dev_attr_fan3_min.dev_attr.attr, 1228 &sensor_dev_attr_fan3_alarm.dev_attr.attr, 1229 &sensor_dev_attr_pwm1.dev_attr.attr, 1230 &sensor_dev_attr_pwm1_freq.dev_attr.attr, 1231 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1232 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, 1233 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1234 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1235 &sensor_dev_attr_pwm1_stall_disable.dev_attr.attr, 1236 &sensor_dev_attr_pwm3.dev_attr.attr, 1237 &sensor_dev_attr_pwm3_freq.dev_attr.attr, 1238 &sensor_dev_attr_pwm3_enable.dev_attr.attr, 1239 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, 1240 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, 1241 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, 1242 &sensor_dev_attr_pwm3_stall_disable.dev_attr.attr, 1243 &dev_attr_pwm_use_point2_pwm_at_crit.attr, 1244 NULL, 1245 }; 1246 1247 static struct attribute *fan4_attrs[] = { 1248 &sensor_dev_attr_fan4_input.dev_attr.attr, 1249 &sensor_dev_attr_fan4_min.dev_attr.attr, 1250 &sensor_dev_attr_fan4_alarm.dev_attr.attr, 1251 NULL 1252 }; 1253 1254 static struct attribute *pwm2_attrs[] = { 1255 &sensor_dev_attr_pwm2.dev_attr.attr, 1256 &sensor_dev_attr_pwm2_freq.dev_attr.attr, 1257 &sensor_dev_attr_pwm2_enable.dev_attr.attr, 1258 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, 1259 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, 1260 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, 1261 &sensor_dev_attr_pwm2_stall_disable.dev_attr.attr, 1262 NULL 1263 }; 1264 1265 static struct attribute *in0_attrs[] = { 1266 &sensor_dev_attr_in0_input.dev_attr.attr, 1267 &sensor_dev_attr_in0_max.dev_attr.attr, 1268 &sensor_dev_attr_in0_min.dev_attr.attr, 1269 &sensor_dev_attr_in0_alarm.dev_attr.attr, 1270 NULL 1271 }; 1272 1273 static struct attribute *in3_attrs[] = { 1274 &sensor_dev_attr_in3_input.dev_attr.attr, 1275 &sensor_dev_attr_in3_max.dev_attr.attr, 1276 &sensor_dev_attr_in3_min.dev_attr.attr, 1277 &sensor_dev_attr_in3_alarm.dev_attr.attr, 1278 NULL 1279 }; 1280 1281 static struct attribute *in4_attrs[] = { 1282 &sensor_dev_attr_in4_input.dev_attr.attr, 1283 &sensor_dev_attr_in4_max.dev_attr.attr, 1284 &sensor_dev_attr_in4_min.dev_attr.attr, 1285 &sensor_dev_attr_in4_alarm.dev_attr.attr, 1286 NULL 1287 }; 1288 1289 static struct attribute *in5_attrs[] = { 1290 &sensor_dev_attr_in5_input.dev_attr.attr, 1291 &sensor_dev_attr_in5_max.dev_attr.attr, 1292 &sensor_dev_attr_in5_min.dev_attr.attr, 1293 &sensor_dev_attr_in5_alarm.dev_attr.attr, 1294 NULL 1295 }; 1296 1297 static struct attribute *vid_attrs[] = { 1298 &dev_attr_cpu0_vid.attr, 1299 &dev_attr_vrm.attr, 1300 NULL 1301 }; 1302 1303 static const struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs }; 1304 static const struct attribute_group fan4_attr_group = { .attrs = fan4_attrs }; 1305 static const struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs }; 1306 static const struct attribute_group in0_attr_group = { .attrs = in0_attrs }; 1307 static const struct attribute_group in3_attr_group = { .attrs = in3_attrs }; 1308 static const struct attribute_group in4_attr_group = { .attrs = in4_attrs }; 1309 static const struct attribute_group in5_attr_group = { .attrs = in5_attrs }; 1310 static const struct attribute_group vid_attr_group = { .attrs = vid_attrs }; 1311 1312 static int adt7475_detect(struct i2c_client *client, 1313 struct i2c_board_info *info) 1314 { 1315 struct i2c_adapter *adapter = client->adapter; 1316 int vendid, devid, devid2; 1317 const char *name; 1318 1319 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1320 return -ENODEV; 1321 1322 vendid = adt7475_read(REG_VENDID); 1323 devid2 = adt7475_read(REG_DEVID2); 1324 if (vendid != 0x41 || /* Analog Devices */ 1325 (devid2 & 0xf8) != 0x68) 1326 return -ENODEV; 1327 1328 devid = adt7475_read(REG_DEVID); 1329 if (devid == 0x73) 1330 name = "adt7473"; 1331 else if (devid == 0x75 && client->addr == 0x2e) 1332 name = "adt7475"; 1333 else if (devid == 0x76) 1334 name = "adt7476"; 1335 else if ((devid2 & 0xfc) == 0x6c) 1336 name = "adt7490"; 1337 else { 1338 dev_dbg(&adapter->dev, 1339 "Couldn't detect an ADT7473/75/76/90 part at " 1340 "0x%02x\n", (unsigned int)client->addr); 1341 return -ENODEV; 1342 } 1343 1344 strscpy(info->type, name, I2C_NAME_SIZE); 1345 1346 return 0; 1347 } 1348 1349 static int adt7475_update_limits(struct i2c_client *client) 1350 { 1351 struct adt7475_data *data = i2c_get_clientdata(client); 1352 int i; 1353 int ret; 1354 1355 ret = adt7475_read(REG_CONFIG4); 1356 if (ret < 0) 1357 return ret; 1358 data->config4 = ret; 1359 1360 ret = adt7475_read(REG_CONFIG5); 1361 if (ret < 0) 1362 return ret; 1363 data->config5 = ret; 1364 1365 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) { 1366 if (!(data->has_voltage & (1 << i))) 1367 continue; 1368 /* Adjust values so they match the input precision */ 1369 ret = adt7475_read(VOLTAGE_MIN_REG(i)); 1370 if (ret < 0) 1371 return ret; 1372 data->voltage[MIN][i] = ret << 2; 1373 1374 ret = adt7475_read(VOLTAGE_MAX_REG(i)); 1375 if (ret < 0) 1376 return ret; 1377 data->voltage[MAX][i] = ret << 2; 1378 } 1379 1380 if (data->has_voltage & (1 << 5)) { 1381 ret = adt7475_read(REG_VTT_MIN); 1382 if (ret < 0) 1383 return ret; 1384 data->voltage[MIN][5] = ret << 2; 1385 1386 ret = adt7475_read(REG_VTT_MAX); 1387 if (ret < 0) 1388 return ret; 1389 data->voltage[MAX][5] = ret << 2; 1390 } 1391 1392 for (i = 0; i < ADT7475_TEMP_COUNT; i++) { 1393 /* Adjust values so they match the input precision */ 1394 ret = adt7475_read(TEMP_MIN_REG(i)); 1395 if (ret < 0) 1396 return ret; 1397 data->temp[MIN][i] = ret << 2; 1398 1399 ret = adt7475_read(TEMP_MAX_REG(i)); 1400 if (ret < 0) 1401 return ret; 1402 data->temp[MAX][i] = ret << 2; 1403 1404 ret = adt7475_read(TEMP_TMIN_REG(i)); 1405 if (ret < 0) 1406 return ret; 1407 data->temp[AUTOMIN][i] = ret << 2; 1408 1409 ret = adt7475_read(TEMP_THERM_REG(i)); 1410 if (ret < 0) 1411 return ret; 1412 data->temp[THERM][i] = ret << 2; 1413 1414 ret = adt7475_read(TEMP_OFFSET_REG(i)); 1415 if (ret < 0) 1416 return ret; 1417 data->temp[OFFSET][i] = ret; 1418 } 1419 adt7475_read_hystersis(client); 1420 1421 for (i = 0; i < ADT7475_TACH_COUNT; i++) { 1422 if (i == 3 && !data->has_fan4) 1423 continue; 1424 ret = adt7475_read_word(client, TACH_MIN_REG(i)); 1425 if (ret < 0) 1426 return ret; 1427 data->tach[MIN][i] = ret; 1428 } 1429 1430 for (i = 0; i < ADT7475_PWM_COUNT; i++) { 1431 if (i == 1 && !data->has_pwm2) 1432 continue; 1433 ret = adt7475_read(PWM_MAX_REG(i)); 1434 if (ret < 0) 1435 return ret; 1436 data->pwm[MAX][i] = ret; 1437 1438 ret = adt7475_read(PWM_MIN_REG(i)); 1439 if (ret < 0) 1440 return ret; 1441 data->pwm[MIN][i] = ret; 1442 /* Set the channel and control information */ 1443 adt7475_read_pwm(client, i); 1444 } 1445 1446 ret = adt7475_read(TEMP_TRANGE_REG(0)); 1447 if (ret < 0) 1448 return ret; 1449 data->range[0] = ret; 1450 1451 ret = adt7475_read(TEMP_TRANGE_REG(1)); 1452 if (ret < 0) 1453 return ret; 1454 data->range[1] = ret; 1455 1456 ret = adt7475_read(TEMP_TRANGE_REG(2)); 1457 if (ret < 0) 1458 return ret; 1459 data->range[2] = ret; 1460 1461 return 0; 1462 } 1463 1464 static int load_config3(const struct i2c_client *client, const char *propname) 1465 { 1466 const char *function; 1467 u8 config3; 1468 int ret; 1469 1470 ret = device_property_read_string(&client->dev, propname, &function); 1471 if (!ret) { 1472 ret = adt7475_read(REG_CONFIG3); 1473 if (ret < 0) 1474 return ret; 1475 1476 config3 = ret & ~CONFIG3_SMBALERT; 1477 if (!strcmp("pwm2", function)) 1478 ; 1479 else if (!strcmp("smbalert#", function)) 1480 config3 |= CONFIG3_SMBALERT; 1481 else 1482 return -EINVAL; 1483 1484 return i2c_smbus_write_byte_data(client, REG_CONFIG3, config3); 1485 } 1486 1487 return 0; 1488 } 1489 1490 static int load_config4(const struct i2c_client *client, const char *propname) 1491 { 1492 const char *function; 1493 u8 config4; 1494 int ret; 1495 1496 ret = device_property_read_string(&client->dev, propname, &function); 1497 if (!ret) { 1498 ret = adt7475_read(REG_CONFIG4); 1499 if (ret < 0) 1500 return ret; 1501 1502 config4 = ret & ~CONFIG4_PINFUNC; 1503 1504 if (!strcmp("tach4", function)) 1505 ; 1506 else if (!strcmp("therm#", function)) 1507 config4 |= CONFIG4_THERM; 1508 else if (!strcmp("smbalert#", function)) 1509 config4 |= CONFIG4_SMBALERT; 1510 else if (!strcmp("gpio", function)) 1511 config4 |= CONFIG4_PINFUNC; 1512 else 1513 return -EINVAL; 1514 1515 return i2c_smbus_write_byte_data(client, REG_CONFIG4, config4); 1516 } 1517 1518 return 0; 1519 } 1520 1521 static int load_config(const struct i2c_client *client, enum chips chip) 1522 { 1523 int err; 1524 const char *prop1, *prop2; 1525 1526 switch (chip) { 1527 case adt7473: 1528 case adt7475: 1529 prop1 = "adi,pin5-function"; 1530 prop2 = "adi,pin9-function"; 1531 break; 1532 case adt7476: 1533 case adt7490: 1534 prop1 = "adi,pin10-function"; 1535 prop2 = "adi,pin14-function"; 1536 break; 1537 } 1538 1539 err = load_config3(client, prop1); 1540 if (err) { 1541 dev_err(&client->dev, "failed to configure %s\n", prop1); 1542 return err; 1543 } 1544 1545 err = load_config4(client, prop2); 1546 if (err) { 1547 dev_err(&client->dev, "failed to configure %s\n", prop2); 1548 return err; 1549 } 1550 1551 return 0; 1552 } 1553 1554 static int set_property_bit(const struct i2c_client *client, char *property, 1555 u8 *config, u8 bit_index) 1556 { 1557 u32 prop_value = 0; 1558 int ret = device_property_read_u32(&client->dev, property, 1559 &prop_value); 1560 1561 if (!ret) { 1562 if (prop_value) 1563 *config |= (1 << bit_index); 1564 else 1565 *config &= ~(1 << bit_index); 1566 } 1567 1568 return ret; 1569 } 1570 1571 static int load_attenuators(const struct i2c_client *client, enum chips chip, 1572 struct adt7475_data *data) 1573 { 1574 switch (chip) { 1575 case adt7476: 1576 case adt7490: 1577 set_property_bit(client, "adi,bypass-attenuator-in0", 1578 &data->config4, 4); 1579 set_property_bit(client, "adi,bypass-attenuator-in1", 1580 &data->config4, 5); 1581 set_property_bit(client, "adi,bypass-attenuator-in3", 1582 &data->config4, 6); 1583 set_property_bit(client, "adi,bypass-attenuator-in4", 1584 &data->config4, 7); 1585 1586 return i2c_smbus_write_byte_data(client, REG_CONFIG4, 1587 data->config4); 1588 case adt7473: 1589 case adt7475: 1590 set_property_bit(client, "adi,bypass-attenuator-in1", 1591 &data->config2, 5); 1592 1593 return i2c_smbus_write_byte_data(client, REG_CONFIG2, 1594 data->config2); 1595 } 1596 1597 return 0; 1598 } 1599 1600 static int adt7475_set_pwm_polarity(struct i2c_client *client) 1601 { 1602 u32 states[ADT7475_PWM_COUNT]; 1603 int ret, i; 1604 u8 val; 1605 1606 ret = device_property_read_u32_array(&client->dev, 1607 "adi,pwm-active-state", states, 1608 ARRAY_SIZE(states)); 1609 if (ret) 1610 return ret; 1611 1612 for (i = 0; i < ADT7475_PWM_COUNT; i++) { 1613 ret = adt7475_read(PWM_CONFIG_REG(i)); 1614 if (ret < 0) 1615 return ret; 1616 val = ret; 1617 if (states[i]) 1618 val &= ~BIT(4); 1619 else 1620 val |= BIT(4); 1621 1622 ret = i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(i), val); 1623 if (ret) 1624 return ret; 1625 } 1626 1627 return 0; 1628 } 1629 1630 static int adt7475_probe(struct i2c_client *client) 1631 { 1632 enum chips chip; 1633 static const char * const names[] = { 1634 [adt7473] = "ADT7473", 1635 [adt7475] = "ADT7475", 1636 [adt7476] = "ADT7476", 1637 [adt7490] = "ADT7490", 1638 }; 1639 1640 struct adt7475_data *data; 1641 struct device *hwmon_dev; 1642 int i, ret = 0, revision, group_num = 0; 1643 u8 config3; 1644 const struct i2c_device_id *id = i2c_match_id(adt7475_id, client); 1645 1646 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); 1647 if (data == NULL) 1648 return -ENOMEM; 1649 1650 mutex_init(&data->lock); 1651 data->client = client; 1652 i2c_set_clientdata(client, data); 1653 1654 if (client->dev.of_node) 1655 chip = (uintptr_t)of_device_get_match_data(&client->dev); 1656 else 1657 chip = id->driver_data; 1658 1659 /* Initialize device-specific values */ 1660 switch (chip) { 1661 case adt7476: 1662 data->has_voltage = 0x0e; /* in1 to in3 */ 1663 revision = adt7475_read(REG_DEVID2) & 0x07; 1664 break; 1665 case adt7490: 1666 data->has_voltage = 0x3e; /* in1 to in5 */ 1667 revision = adt7475_read(REG_DEVID2) & 0x03; 1668 if (revision == 0x03) 1669 revision += adt7475_read(REG_DEVREV2); 1670 break; 1671 default: 1672 data->has_voltage = 0x06; /* in1, in2 */ 1673 revision = adt7475_read(REG_DEVID2) & 0x07; 1674 } 1675 1676 ret = load_config(client, chip); 1677 if (ret) 1678 return ret; 1679 1680 config3 = adt7475_read(REG_CONFIG3); 1681 /* Pin PWM2 may alternatively be used for ALERT output */ 1682 if (!(config3 & CONFIG3_SMBALERT)) 1683 data->has_pwm2 = 1; 1684 /* Meaning of this bit is inverted for the ADT7473-1 */ 1685 if (id->driver_data == adt7473 && revision >= 1) 1686 data->has_pwm2 = !data->has_pwm2; 1687 1688 data->config4 = adt7475_read(REG_CONFIG4); 1689 /* Pin TACH4 may alternatively be used for THERM */ 1690 if ((data->config4 & CONFIG4_PINFUNC) == 0x0) 1691 data->has_fan4 = 1; 1692 1693 /* 1694 * THERM configuration is more complex on the ADT7476 and ADT7490, 1695 * because 2 different pins (TACH4 and +2.5 Vin) can be used for 1696 * this function 1697 */ 1698 if (id->driver_data == adt7490) { 1699 if ((data->config4 & CONFIG4_PINFUNC) == 0x1 && 1700 !(config3 & CONFIG3_THERM)) 1701 data->has_fan4 = 1; 1702 } 1703 if (id->driver_data == adt7476 || id->driver_data == adt7490) { 1704 if (!(config3 & CONFIG3_THERM) || 1705 (data->config4 & CONFIG4_PINFUNC) == 0x1) 1706 data->has_voltage |= (1 << 0); /* in0 */ 1707 } 1708 1709 /* 1710 * On the ADT7476, the +12V input pin may instead be used as VID5, 1711 * and VID pins may alternatively be used as GPIO 1712 */ 1713 if (id->driver_data == adt7476) { 1714 u8 vid = adt7475_read(REG_VID); 1715 if (!(vid & VID_VIDSEL)) 1716 data->has_voltage |= (1 << 4); /* in4 */ 1717 1718 data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO); 1719 } 1720 1721 /* Voltage attenuators can be bypassed, globally or individually */ 1722 data->config2 = adt7475_read(REG_CONFIG2); 1723 ret = load_attenuators(client, chip, data); 1724 if (ret) 1725 dev_warn(&client->dev, "Error configuring attenuator bypass\n"); 1726 1727 if (data->config2 & CONFIG2_ATTN) { 1728 data->bypass_attn = (0x3 << 3) | 0x3; 1729 } else { 1730 data->bypass_attn = ((data->config4 & CONFIG4_ATTN_IN10) >> 4) | 1731 ((data->config4 & CONFIG4_ATTN_IN43) >> 3); 1732 } 1733 data->bypass_attn &= data->has_voltage; 1734 1735 /* 1736 * Call adt7475_read_pwm for all pwm's as this will reprogram any 1737 * pwm's which are disabled to manual mode with 0% duty cycle 1738 */ 1739 for (i = 0; i < ADT7475_PWM_COUNT; i++) 1740 adt7475_read_pwm(client, i); 1741 1742 ret = adt7475_set_pwm_polarity(client); 1743 if (ret && ret != -EINVAL) 1744 dev_warn(&client->dev, "Error configuring pwm polarity\n"); 1745 1746 /* Start monitoring */ 1747 switch (chip) { 1748 case adt7475: 1749 case adt7476: 1750 i2c_smbus_write_byte_data(client, REG_CONFIG1, 1751 adt7475_read(REG_CONFIG1) | 0x01); 1752 break; 1753 default: 1754 break; 1755 } 1756 1757 data->groups[group_num++] = &adt7475_attr_group; 1758 1759 /* Features that can be disabled individually */ 1760 if (data->has_fan4) { 1761 data->groups[group_num++] = &fan4_attr_group; 1762 } 1763 if (data->has_pwm2) { 1764 data->groups[group_num++] = &pwm2_attr_group; 1765 } 1766 if (data->has_voltage & (1 << 0)) { 1767 data->groups[group_num++] = &in0_attr_group; 1768 } 1769 if (data->has_voltage & (1 << 3)) { 1770 data->groups[group_num++] = &in3_attr_group; 1771 } 1772 if (data->has_voltage & (1 << 4)) { 1773 data->groups[group_num++] = &in4_attr_group; 1774 } 1775 if (data->has_voltage & (1 << 5)) { 1776 data->groups[group_num++] = &in5_attr_group; 1777 } 1778 if (data->has_vid) { 1779 data->vrm = vid_which_vrm(); 1780 data->groups[group_num] = &vid_attr_group; 1781 } 1782 1783 /* register device with all the acquired attributes */ 1784 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev, 1785 client->name, data, 1786 data->groups); 1787 1788 if (IS_ERR(hwmon_dev)) { 1789 ret = PTR_ERR(hwmon_dev); 1790 return ret; 1791 } 1792 1793 dev_info(&client->dev, "%s device, revision %d\n", 1794 names[id->driver_data], revision); 1795 if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2) 1796 dev_info(&client->dev, "Optional features:%s%s%s%s%s\n", 1797 (data->has_voltage & (1 << 0)) ? " in0" : "", 1798 (data->has_voltage & (1 << 4)) ? " in4" : "", 1799 data->has_fan4 ? " fan4" : "", 1800 data->has_pwm2 ? " pwm2" : "", 1801 data->has_vid ? " vid" : ""); 1802 if (data->bypass_attn) 1803 dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n", 1804 (data->bypass_attn & (1 << 0)) ? " in0" : "", 1805 (data->bypass_attn & (1 << 1)) ? " in1" : "", 1806 (data->bypass_attn & (1 << 3)) ? " in3" : "", 1807 (data->bypass_attn & (1 << 4)) ? " in4" : ""); 1808 1809 /* Limits and settings, should never change update more than once */ 1810 ret = adt7475_update_limits(client); 1811 if (ret) 1812 return ret; 1813 1814 return 0; 1815 } 1816 1817 static struct i2c_driver adt7475_driver = { 1818 .class = I2C_CLASS_HWMON, 1819 .driver = { 1820 .name = "adt7475", 1821 .of_match_table = of_match_ptr(adt7475_of_match), 1822 }, 1823 .probe = adt7475_probe, 1824 .id_table = adt7475_id, 1825 .detect = adt7475_detect, 1826 .address_list = normal_i2c, 1827 }; 1828 1829 static void adt7475_read_hystersis(struct i2c_client *client) 1830 { 1831 struct adt7475_data *data = i2c_get_clientdata(client); 1832 1833 data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS); 1834 data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0]; 1835 data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS); 1836 } 1837 1838 static void adt7475_read_pwm(struct i2c_client *client, int index) 1839 { 1840 struct adt7475_data *data = i2c_get_clientdata(client); 1841 unsigned int v; 1842 1843 data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index)); 1844 1845 /* 1846 * Figure out the internal value for pwmctrl and pwmchan 1847 * based on the current settings 1848 */ 1849 v = (data->pwm[CONTROL][index] >> 5) & 7; 1850 1851 if (v == 3) 1852 data->pwmctl[index] = 0; 1853 else if (v == 7) 1854 data->pwmctl[index] = 1; 1855 else if (v == 4) { 1856 /* 1857 * The fan is disabled - we don't want to 1858 * support that, so change to manual mode and 1859 * set the duty cycle to 0 instead 1860 */ 1861 data->pwm[INPUT][index] = 0; 1862 data->pwm[CONTROL][index] &= ~0xE0; 1863 data->pwm[CONTROL][index] |= (7 << 5); 1864 1865 i2c_smbus_write_byte_data(client, PWM_REG(index), 1866 data->pwm[INPUT][index]); 1867 1868 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index), 1869 data->pwm[CONTROL][index]); 1870 1871 data->pwmctl[index] = 1; 1872 } else { 1873 data->pwmctl[index] = 2; 1874 1875 switch (v) { 1876 case 0: 1877 data->pwmchan[index] = 1; 1878 break; 1879 case 1: 1880 data->pwmchan[index] = 2; 1881 break; 1882 case 2: 1883 data->pwmchan[index] = 4; 1884 break; 1885 case 5: 1886 data->pwmchan[index] = 6; 1887 break; 1888 case 6: 1889 data->pwmchan[index] = 7; 1890 break; 1891 } 1892 } 1893 } 1894 1895 static int adt7475_update_measure(struct device *dev) 1896 { 1897 struct adt7475_data *data = dev_get_drvdata(dev); 1898 struct i2c_client *client = data->client; 1899 u16 ext; 1900 int i; 1901 int ret; 1902 1903 ret = adt7475_read(REG_STATUS2); 1904 if (ret < 0) 1905 return ret; 1906 data->alarms = ret << 8; 1907 1908 ret = adt7475_read(REG_STATUS1); 1909 if (ret < 0) 1910 return ret; 1911 data->alarms |= ret; 1912 1913 ret = adt7475_read(REG_EXTEND2); 1914 if (ret < 0) 1915 return ret; 1916 1917 ext = (ret << 8); 1918 1919 ret = adt7475_read(REG_EXTEND1); 1920 if (ret < 0) 1921 return ret; 1922 1923 ext |= ret; 1924 1925 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) { 1926 if (!(data->has_voltage & (1 << i))) 1927 continue; 1928 ret = adt7475_read(VOLTAGE_REG(i)); 1929 if (ret < 0) 1930 return ret; 1931 data->voltage[INPUT][i] = 1932 (ret << 2) | 1933 ((ext >> (i * 2)) & 3); 1934 } 1935 1936 for (i = 0; i < ADT7475_TEMP_COUNT; i++) { 1937 ret = adt7475_read(TEMP_REG(i)); 1938 if (ret < 0) 1939 return ret; 1940 data->temp[INPUT][i] = 1941 (ret << 2) | 1942 ((ext >> ((i + 5) * 2)) & 3); 1943 } 1944 1945 if (data->has_voltage & (1 << 5)) { 1946 ret = adt7475_read(REG_STATUS4); 1947 if (ret < 0) 1948 return ret; 1949 data->alarms |= ret << 24; 1950 1951 ret = adt7475_read(REG_EXTEND3); 1952 if (ret < 0) 1953 return ret; 1954 ext = ret; 1955 1956 ret = adt7475_read(REG_VTT); 1957 if (ret < 0) 1958 return ret; 1959 data->voltage[INPUT][5] = ret << 2 | 1960 ((ext >> 4) & 3); 1961 } 1962 1963 for (i = 0; i < ADT7475_TACH_COUNT; i++) { 1964 if (i == 3 && !data->has_fan4) 1965 continue; 1966 ret = adt7475_read_word(client, TACH_REG(i)); 1967 if (ret < 0) 1968 return ret; 1969 data->tach[INPUT][i] = ret; 1970 } 1971 1972 /* Updated by hw when in auto mode */ 1973 for (i = 0; i < ADT7475_PWM_COUNT; i++) { 1974 if (i == 1 && !data->has_pwm2) 1975 continue; 1976 ret = adt7475_read(PWM_REG(i)); 1977 if (ret < 0) 1978 return ret; 1979 data->pwm[INPUT][i] = ret; 1980 } 1981 1982 if (data->has_vid) { 1983 ret = adt7475_read(REG_VID); 1984 if (ret < 0) 1985 return ret; 1986 data->vid = ret & 0x3f; 1987 } 1988 1989 return 0; 1990 } 1991 1992 static struct adt7475_data *adt7475_update_device(struct device *dev) 1993 { 1994 struct adt7475_data *data = dev_get_drvdata(dev); 1995 int ret; 1996 1997 mutex_lock(&data->lock); 1998 1999 /* Measurement values update every 2 seconds */ 2000 if (time_after(jiffies, data->measure_updated + HZ * 2) || 2001 !data->valid) { 2002 ret = adt7475_update_measure(dev); 2003 if (ret) { 2004 data->valid = false; 2005 mutex_unlock(&data->lock); 2006 return ERR_PTR(ret); 2007 } 2008 data->measure_updated = jiffies; 2009 data->valid = true; 2010 } 2011 2012 mutex_unlock(&data->lock); 2013 2014 return data; 2015 } 2016 2017 module_i2c_driver(adt7475_driver); 2018 2019 MODULE_AUTHOR("Advanced Micro Devices, Inc"); 2020 MODULE_DESCRIPTION("adt7475 driver"); 2021 MODULE_LICENSE("GPL"); 2022