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