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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 | // SPDX-License-Identifier: GPL-2.0-or-later /* * adm9240.c Part of lm_sensors, Linux kernel modules for hardware * monitoring * * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> * Philip Edelbrock <phil@netroedge.com> * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable * guidance from Jean Delvare * * Driver supports Analog Devices ADM9240 * Dallas Semiconductor DS1780 * National Semiconductor LM81 * * ADM9240 is the reference, DS1780 and LM81 are register compatibles * * Voltage Six inputs are scaled by chip, VID also reported * Temperature Chip temperature to 0.5'C, maximum and max_hysteris * Fans 2 fans, low speed alarm, automatic fan clock divider * Alarms 16-bit map of active alarms * Analog Out 0..1250 mV output * * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' * * Test hardware: Intel SE440BX-2 desktop motherboard --Grant * * LM81 extended temp reading not implemented */ #include <linux/bits.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon.h> #include <linux/hwmon-vid.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/regmap.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; enum chips { adm9240, ds1780, lm81 }; /* ADM9240 registers */ #define ADM9240_REG_MAN_ID 0x3e #define ADM9240_REG_DIE_REV 0x3f #define ADM9240_REG_CONFIG 0x40 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) #define ADM9240_REG_INT(nr) (0x41 + (nr)) #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) #define ADM9240_REG_TEMP 0x27 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ #define ADM9240_REG_ANALOG_OUT 0x19 #define ADM9240_REG_CHASSIS_CLEAR 0x46 #define ADM9240_REG_VID_FAN_DIV 0x47 #define ADM9240_REG_I2C_ADDR 0x48 #define ADM9240_REG_VID4 0x49 #define ADM9240_REG_TEMP_CONF 0x4b /* generalised scaling with integer rounding */ static inline int SCALE(long val, int mul, int div) { if (val < 0) return (val * mul - div / 2) / div; else return (val * mul + div / 2) / div; } /* adm9240 internally scales voltage measurements */ static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; static inline unsigned int IN_FROM_REG(u8 reg, int n) { return SCALE(reg, nom_mv[n], 192); } static inline u8 IN_TO_REG(unsigned long val, int n) { val = clamp_val(val, 0, nom_mv[n] * 255 / 192); return SCALE(val, 192, nom_mv[n]); } /* temperature range: -40..125, 127 disables temperature alarm */ static inline s8 TEMP_TO_REG(long val) { val = clamp_val(val, -40000, 127000); return SCALE(val, 1, 1000); } /* two fans, each with low fan speed limit */ static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) { if (!reg) /* error */ return -1; if (reg == 255) return 0; return SCALE(1350000, 1, reg * div); } /* analog out 0..1250mV */ static inline u8 AOUT_TO_REG(unsigned long val) { val = clamp_val(val, 0, 1250); return SCALE(val, 255, 1250); } static inline unsigned int AOUT_FROM_REG(u8 reg) { return SCALE(reg, 1250, 255); } /* per client data */ struct adm9240_data { struct device *dev; struct regmap *regmap; struct mutex update_lock; u8 fan_div[2]; /* rw fan1_div, read-only accessor */ u8 vrm; /* -- vrm set on startup, no accessor */ }; /* write new fan div, callers must hold data->update_lock */ static int adm9240_write_fan_div(struct adm9240_data *data, int channel, u8 fan_div) { unsigned int reg, old, shift = (channel + 2) * 2; int err; err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®); if (err < 0) return err; old = (reg >> shift) & 3; reg &= ~(3 << shift); reg |= (fan_div << shift); err = regmap_write(data->regmap, ADM9240_REG_VID_FAN_DIV, reg); if (err < 0) return err; dev_dbg(data->dev, "fan%d clock divider changed from %lu to %lu\n", channel + 1, BIT(old), BIT(fan_div)); return 0; } /* * set fan speed low limit: * * - value is zero: disable fan speed low limit alarm * * - value is below fan speed measurement range: enable fan speed low * limit alarm to be asserted while fan speed too slow to measure * * - otherwise: select fan clock divider to suit fan speed low limit, * measurement code may adjust registers to ensure fan speed reading */ static int adm9240_fan_min_write(struct adm9240_data *data, int channel, long val) { u8 new_div; u8 fan_min; int err; mutex_lock(&data->update_lock); if (!val) { fan_min = 255; new_div = data->fan_div[channel]; dev_dbg(data->dev, "fan%u low limit set disabled\n", channel + 1); } else if (val < 1350000 / (8 * 254)) { new_div = 3; fan_min = 254; dev_dbg(data->dev, "fan%u low limit set minimum %u\n", channel + 1, FAN_FROM_REG(254, BIT(new_div))); } else { unsigned int new_min = 1350000 / val; new_div = 0; while (new_min > 192 && new_div < 3) { new_div++; new_min /= 2; } if (!new_min) /* keep > 0 */ new_min++; fan_min = new_min; dev_dbg(data->dev, "fan%u low limit set fan speed %u\n", channel + 1, FAN_FROM_REG(new_min, BIT(new_div))); } if (new_div != data->fan_div[channel]) { data->fan_div[channel] = new_div; adm9240_write_fan_div(data, channel, new_div); } err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(channel), fan_min); mutex_unlock(&data->update_lock); return err; } static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adm9240_data *data = dev_get_drvdata(dev); unsigned int regval; int err; u8 vid; err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®val); if (err < 0) return err; vid = regval & 0x0f; err = regmap_read(data->regmap, ADM9240_REG_VID4, ®val); if (err < 0) return err; vid |= (regval & 1) << 4; return sprintf(buf, "%d\n", vid_from_reg(vid, data->vrm)); } static DEVICE_ATTR_RO(cpu0_vid); static ssize_t aout_output_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adm9240_data *data = dev_get_drvdata(dev); unsigned int regval; int err; err = regmap_read(data->regmap, ADM9240_REG_ANALOG_OUT, ®val); if (err) return err; return sprintf(buf, "%d\n", AOUT_FROM_REG(regval)); } static ssize_t aout_output_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct adm9240_data *data = dev_get_drvdata(dev); long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, AOUT_TO_REG(val)); return err < 0 ? err : count; } static DEVICE_ATTR_RW(aout_output); static struct attribute *adm9240_attrs[] = { &dev_attr_aout_output.attr, &dev_attr_cpu0_vid.attr, NULL }; ATTRIBUTE_GROUPS(adm9240); /*** sensor chip detect and driver install ***/ /* Return 0 if detection is successful, -ENODEV otherwise */ static int adm9240_detect(struct i2c_client *new_client, struct i2c_board_info *info) { struct i2c_adapter *adapter = new_client->adapter; const char *name = ""; int address = new_client->addr; u8 man_id, die_rev; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; /* verify chip: reg address should match i2c address */ if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) != address) return -ENODEV; /* check known chip manufacturer */ man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); if (man_id == 0x23) name = "adm9240"; else if (man_id == 0xda) name = "ds1780"; else if (man_id == 0x01) name = "lm81"; else return -ENODEV; /* successful detect, print chip info */ die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); dev_info(&adapter->dev, "found %s revision %u\n", man_id == 0x23 ? "ADM9240" : man_id == 0xda ? "DS1780" : "LM81", die_rev); strscpy(info->type, name, I2C_NAME_SIZE); return 0; } static int adm9240_init_client(struct adm9240_data *data) { unsigned int regval; u8 conf, mode; int err; err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 1); if (err < 0) return err; err = regmap_raw_read(data->regmap, ADM9240_REG_TEMP_CONF, &mode, 1); if (err < 0) return err; mode &= 3; data->vrm = vid_which_vrm(); /* need this to report vid as mV */ dev_info(data->dev, "Using VRM: %d.%d\n", data->vrm / 10, data->vrm % 10); if (conf & 1) { /* measurement cycle running: report state */ dev_info(data->dev, "status: config 0x%02x mode %u\n", conf, mode); } else { /* cold start: open limits before starting chip */ int i; for (i = 0; i < 6; i++) { err = regmap_write(data->regmap, ADM9240_REG_IN_MIN(i), 0); if (err < 0) return err; err = regmap_write(data->regmap, ADM9240_REG_IN_MAX(i), 255); if (err < 0) return err; } for (i = 0; i < 2; i++) { err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(i), 255); if (err < 0) return err; } for (i = 0; i < 2; i++) { err = regmap_write(data->regmap, ADM9240_REG_TEMP_MAX(i), 127); if (err < 0) return err; } /* start measurement cycle */ err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1); if (err < 0) return err; dev_info(data->dev, "cold start: config was 0x%02x mode %u\n", conf, mode); } /* read fan divs */ err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®val); if (err < 0) return err; data->fan_div[0] = (regval >> 4) & 3; data->fan_div[1] = (regval >> 6) & 3; return 0; } static int adm9240_chip_read(struct device *dev, u32 attr, long *val) { struct adm9240_data *data = dev_get_drvdata(dev); u8 regs[2]; int err; switch (attr) { case hwmon_chip_alarms: err = regmap_bulk_read(data->regmap, ADM9240_REG_INT(0), ®s, 2); if (err < 0) return err; *val = regs[0] | regs[1] << 8; break; default: return -EOPNOTSUPP; } return 0; } static int adm9240_intrusion_read(struct device *dev, u32 attr, long *val) { struct adm9240_data *data = dev_get_drvdata(dev); unsigned int regval; int err; switch (attr) { case hwmon_intrusion_alarm: err = regmap_read(data->regmap, ADM9240_REG_INT(1), ®val); if (err < 0) return err; *val = !!(regval & BIT(4)); break; default: return -EOPNOTSUPP; } return 0; } static int adm9240_intrusion_write(struct device *dev, u32 attr, long val) { struct adm9240_data *data = dev_get_drvdata(dev); int err; switch (attr) { case hwmon_intrusion_alarm: if (val) return -EINVAL; err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80); if (err < 0) return err; dev_dbg(data->dev, "chassis intrusion latch cleared\n"); break; default: return -EOPNOTSUPP; } return 0; } static int adm9240_in_read(struct device *dev, u32 attr, int channel, long *val) { struct adm9240_data *data = dev_get_drvdata(dev); unsigned int regval; int reg; int err; switch (attr) { case hwmon_in_input: reg = ADM9240_REG_IN(channel); break; case hwmon_in_min: reg = ADM9240_REG_IN_MIN(channel); break; case hwmon_in_max: reg = ADM9240_REG_IN_MAX(channel); break; case hwmon_in_alarm: if (channel < 4) { reg = ADM9240_REG_INT(0); } else { reg = ADM9240_REG_INT(1); channel -= 4; } err = regmap_read(data->regmap, reg, ®val); if (err < 0) return err; *val = !!(regval & BIT(channel)); return 0; default: return -EOPNOTSUPP; } err = regmap_read(data->regmap, reg, ®val); if (err < 0) return err; *val = IN_FROM_REG(regval, channel); return 0; } static int adm9240_in_write(struct device *dev, u32 attr, int channel, long val) { struct adm9240_data *data = dev_get_drvdata(dev); int reg; switch (attr) { case hwmon_in_min: reg = ADM9240_REG_IN_MIN(channel); break; case hwmon_in_max: reg = ADM9240_REG_IN_MAX(channel); break; default: return -EOPNOTSUPP; } return regmap_write(data->regmap, reg, IN_TO_REG(val, channel)); } static int adm9240_fan_read(struct device *dev, u32 attr, int channel, long *val) { struct adm9240_data *data = dev_get_drvdata(dev); unsigned int regval; int err; switch (attr) { case hwmon_fan_input: mutex_lock(&data->update_lock); err = regmap_read(data->regmap, ADM9240_REG_FAN(channel), ®val); if (err < 0) { mutex_unlock(&data->update_lock); return err; } if (regval == 255 && data->fan_div[channel] < 3) { /* adjust fan clock divider on overflow */ err = adm9240_write_fan_div(data, channel, ++data->fan_div[channel]); if (err) { mutex_unlock(&data->update_lock); return err; } } *val = FAN_FROM_REG(regval, BIT(data->fan_div[channel])); mutex_unlock(&data->update_lock); break; case hwmon_fan_div: *val = BIT(data->fan_div[channel]); break; case hwmon_fan_min: err = regmap_read(data->regmap, ADM9240_REG_FAN_MIN(channel), ®val); if (err < 0) return err; *val = FAN_FROM_REG(regval, BIT(data->fan_div[channel])); break; case hwmon_fan_alarm: err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val); if (err < 0) return err; *val = !!(regval & BIT(channel + 6)); break; default: return -EOPNOTSUPP; } return 0; } static int adm9240_fan_write(struct device *dev, u32 attr, int channel, long val) { struct adm9240_data *data = dev_get_drvdata(dev); int err; switch (attr) { case hwmon_fan_min: err = adm9240_fan_min_write(data, channel, val); if (err < 0) return err; break; default: return -EOPNOTSUPP; } return 0; } static int adm9240_temp_read(struct device *dev, u32 attr, int channel, long *val) { struct adm9240_data *data = dev_get_drvdata(dev); unsigned int regval; int err, temp; switch (attr) { case hwmon_temp_input: err = regmap_read(data->regmap, ADM9240_REG_TEMP, ®val); if (err < 0) return err; temp = regval << 1; err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, ®val); if (err < 0) return err; temp |= regval >> 7; *val = sign_extend32(temp, 8) * 500; break; case hwmon_temp_max: err = regmap_read(data->regmap, ADM9240_REG_TEMP_MAX(0), ®val); if (err < 0) return err; *val = (s8)regval * 1000; break; case hwmon_temp_max_hyst: err = regmap_read(data->regmap, ADM9240_REG_TEMP_MAX(1), ®val); if (err < 0) return err; *val = (s8)regval * 1000; break; case hwmon_temp_alarm: err = regmap_read(data->regmap, ADM9240_REG_INT(0), ®val); if (err < 0) return err; *val = !!(regval & BIT(4)); break; default: return -EOPNOTSUPP; } return 0; } static int adm9240_temp_write(struct device *dev, u32 attr, int channel, long val) { struct adm9240_data *data = dev_get_drvdata(dev); int reg; switch (attr) { case hwmon_temp_max: reg = ADM9240_REG_TEMP_MAX(0); break; case hwmon_temp_max_hyst: reg = ADM9240_REG_TEMP_MAX(1); break; default: return -EOPNOTSUPP; } return regmap_write(data->regmap, reg, TEMP_TO_REG(val)); } static int adm9240_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { switch (type) { case hwmon_chip: return adm9240_chip_read(dev, attr, val); case hwmon_intrusion: return adm9240_intrusion_read(dev, attr, val); case hwmon_in: return adm9240_in_read(dev, attr, channel, val); case hwmon_fan: return adm9240_fan_read(dev, attr, channel, val); case hwmon_temp: return adm9240_temp_read(dev, attr, channel, val); default: return -EOPNOTSUPP; } } static int adm9240_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { switch (type) { case hwmon_intrusion: return adm9240_intrusion_write(dev, attr, val); case hwmon_in: return adm9240_in_write(dev, attr, channel, val); case hwmon_fan: return adm9240_fan_write(dev, attr, channel, val); case hwmon_temp: return adm9240_temp_write(dev, attr, channel, val); default: return -EOPNOTSUPP; } } static umode_t adm9240_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, int channel) { umode_t mode = 0; switch (type) { case hwmon_chip: switch (attr) { case hwmon_chip_alarms: mode = 0444; break; default: break; } break; case hwmon_intrusion: switch (attr) { case hwmon_intrusion_alarm: mode = 0644; break; default: break; } break; case hwmon_temp: switch (attr) { case hwmon_temp: case hwmon_temp_alarm: mode = 0444; break; case hwmon_temp_max: case hwmon_temp_max_hyst: mode = 0644; break; default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_input: case hwmon_fan_div: case hwmon_fan_alarm: mode = 0444; break; case hwmon_fan_min: mode = 0644; break; default: break; } break; case hwmon_in: switch (attr) { case hwmon_in_input: case hwmon_in_alarm: mode = 0444; break; case hwmon_in_min: case hwmon_in_max: mode = 0644; break; default: break; } break; default: break; } return mode; } static const struct hwmon_ops adm9240_hwmon_ops = { .is_visible = adm9240_is_visible, .read = adm9240_read, .write = adm9240_write, }; static const struct hwmon_channel_info * const adm9240_info[] = { HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS), HWMON_CHANNEL_INFO(intrusion, HWMON_INTRUSION_ALARM), HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | HWMON_T_ALARM), HWMON_CHANNEL_INFO(in, HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_DIV | HWMON_F_ALARM, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_DIV | HWMON_F_ALARM), NULL }; static const struct hwmon_chip_info adm9240_chip_info = { .ops = &adm9240_hwmon_ops, .info = adm9240_info, }; static bool adm9240_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case ADM9240_REG_IN(0) ... ADM9240_REG_IN(5): case ADM9240_REG_FAN(0) ... ADM9240_REG_FAN(1): case ADM9240_REG_INT(0) ... ADM9240_REG_INT(1): case ADM9240_REG_TEMP: case ADM9240_REG_TEMP_CONF: case ADM9240_REG_VID_FAN_DIV: case ADM9240_REG_VID4: case ADM9240_REG_ANALOG_OUT: return true; default: return false; } } static const struct regmap_config adm9240_regmap_config = { .reg_bits = 8, .val_bits = 8, .use_single_read = true, .use_single_write = true, .volatile_reg = adm9240_volatile_reg, }; static int adm9240_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct device *hwmon_dev; struct adm9240_data *data; int err; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->dev = dev; mutex_init(&data->update_lock); data->regmap = devm_regmap_init_i2c(client, &adm9240_regmap_config); if (IS_ERR(data->regmap)) return PTR_ERR(data->regmap); err = adm9240_init_client(data); if (err < 0) return err; hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data, &adm9240_chip_info, adm9240_groups); return PTR_ERR_OR_ZERO(hwmon_dev); } static const struct i2c_device_id adm9240_id[] = { { "adm9240", adm9240 }, { "ds1780", ds1780 }, { "lm81", lm81 }, { } }; MODULE_DEVICE_TABLE(i2c, adm9240_id); static struct i2c_driver adm9240_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "adm9240", }, .probe = adm9240_probe, .id_table = adm9240_id, .detect = adm9240_detect, .address_list = normal_i2c, }; module_i2c_driver(adm9240_driver); MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " "Grant Coady <gcoady.lk@gmail.com> and others"); MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); MODULE_LICENSE("GPL"); |