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