1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * adm9240.c Part of lm_sensors, Linux kernel modules for hardware 4 * monitoring 5 * 6 * Copyright (C) 1999 Frodo Looijaard <frodol@dds.nl> 7 * Philip Edelbrock <phil@netroedge.com> 8 * Copyright (C) 2003 Michiel Rook <michiel@grendelproject.nl> 9 * Copyright (C) 2005 Grant Coady <gcoady.lk@gmail.com> with valuable 10 * guidance from Jean Delvare 11 * 12 * Driver supports Analog Devices ADM9240 13 * Dallas Semiconductor DS1780 14 * National Semiconductor LM81 15 * 16 * ADM9240 is the reference, DS1780 and LM81 are register compatibles 17 * 18 * Voltage Six inputs are scaled by chip, VID also reported 19 * Temperature Chip temperature to 0.5'C, maximum and max_hysteris 20 * Fans 2 fans, low speed alarm, automatic fan clock divider 21 * Alarms 16-bit map of active alarms 22 * Analog Out 0..1250 mV output 23 * 24 * Chassis Intrusion: clear CI latch with 'echo 0 > intrusion0_alarm' 25 * 26 * Test hardware: Intel SE440BX-2 desktop motherboard --Grant 27 * 28 * LM81 extended temp reading not implemented 29 */ 30 31 #include <linux/init.h> 32 #include <linux/module.h> 33 #include <linux/slab.h> 34 #include <linux/i2c.h> 35 #include <linux/hwmon-sysfs.h> 36 #include <linux/hwmon.h> 37 #include <linux/hwmon-vid.h> 38 #include <linux/err.h> 39 #include <linux/mutex.h> 40 #include <linux/jiffies.h> 41 #include <linux/regmap.h> 42 43 /* Addresses to scan */ 44 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, 45 I2C_CLIENT_END }; 46 47 enum chips { adm9240, ds1780, lm81 }; 48 49 /* ADM9240 registers */ 50 #define ADM9240_REG_MAN_ID 0x3e 51 #define ADM9240_REG_DIE_REV 0x3f 52 #define ADM9240_REG_CONFIG 0x40 53 54 #define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ 55 #define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) 56 #define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) 57 #define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ 58 #define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) 59 #define ADM9240_REG_INT(nr) (0x41 + (nr)) 60 #define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) 61 #define ADM9240_REG_TEMP 0x27 62 #define ADM9240_REG_TEMP_MAX(nr) (0x39 + (nr)) /* 0, 1 = high, hyst */ 63 #define ADM9240_REG_ANALOG_OUT 0x19 64 #define ADM9240_REG_CHASSIS_CLEAR 0x46 65 #define ADM9240_REG_VID_FAN_DIV 0x47 66 #define ADM9240_REG_I2C_ADDR 0x48 67 #define ADM9240_REG_VID4 0x49 68 #define ADM9240_REG_TEMP_CONF 0x4b 69 70 /* generalised scaling with integer rounding */ 71 static inline int SCALE(long val, int mul, int div) 72 { 73 if (val < 0) 74 return (val * mul - div / 2) / div; 75 else 76 return (val * mul + div / 2) / div; 77 } 78 79 /* adm9240 internally scales voltage measurements */ 80 static const u16 nom_mv[] = { 2500, 2700, 3300, 5000, 12000, 2700 }; 81 82 static inline unsigned int IN_FROM_REG(u8 reg, int n) 83 { 84 return SCALE(reg, nom_mv[n], 192); 85 } 86 87 static inline u8 IN_TO_REG(unsigned long val, int n) 88 { 89 val = clamp_val(val, 0, nom_mv[n] * 255 / 192); 90 return SCALE(val, 192, nom_mv[n]); 91 } 92 93 /* temperature range: -40..125, 127 disables temperature alarm */ 94 static inline s8 TEMP_TO_REG(long val) 95 { 96 val = clamp_val(val, -40000, 127000); 97 return SCALE(val, 1, 1000); 98 } 99 100 /* two fans, each with low fan speed limit */ 101 static inline unsigned int FAN_FROM_REG(u8 reg, u8 div) 102 { 103 if (!reg) /* error */ 104 return -1; 105 106 if (reg == 255) 107 return 0; 108 109 return SCALE(1350000, 1, reg * div); 110 } 111 112 /* analog out 0..1250mV */ 113 static inline u8 AOUT_TO_REG(unsigned long val) 114 { 115 val = clamp_val(val, 0, 1250); 116 return SCALE(val, 255, 1250); 117 } 118 119 static inline unsigned int AOUT_FROM_REG(u8 reg) 120 { 121 return SCALE(reg, 1250, 255); 122 } 123 124 /* per client data */ 125 struct adm9240_data { 126 struct i2c_client *client; 127 struct regmap *regmap; 128 struct mutex update_lock; 129 char valid; 130 unsigned long last_updated_measure; 131 unsigned long last_updated_config; 132 133 u8 in[6]; /* ro in0_input */ 134 u8 in_max[6]; /* rw in0_max */ 135 u8 in_min[6]; /* rw in0_min */ 136 u8 fan[2]; /* ro fan1_input */ 137 u8 fan_min[2]; /* rw fan1_min */ 138 u8 fan_div[2]; /* rw fan1_div, read-only accessor */ 139 s16 temp; /* ro temp1_input, 9-bit sign-extended */ 140 s8 temp_max[2]; /* rw 0 -> temp_max, 1 -> temp_max_hyst */ 141 u16 alarms; /* ro alarms */ 142 u8 aout; /* rw aout_output */ 143 u8 vid; /* ro vid */ 144 u8 vrm; /* -- vrm set on startup, no accessor */ 145 }; 146 147 /* write new fan div, callers must hold data->update_lock */ 148 static int adm9240_write_fan_div(struct adm9240_data *data, int nr, 149 u8 fan_div) 150 { 151 unsigned int reg, old, shift = (nr + 2) * 2; 152 int err; 153 154 err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, ®); 155 if (err < 0) 156 return err; 157 old = (reg >> shift) & 3; 158 reg &= ~(3 << shift); 159 reg |= (fan_div << shift); 160 err = regmap_write(data->regmap, ADM9240_REG_VID_FAN_DIV, reg); 161 if (err < 0) 162 return err; 163 dev_dbg(&data->client->dev, 164 "fan%d clock divider changed from %u to %u\n", 165 nr + 1, 1 << old, 1 << fan_div); 166 167 return 0; 168 } 169 170 static int adm9240_update_measure(struct adm9240_data *data) 171 { 172 unsigned int val; 173 u8 regs[2]; 174 int err; 175 int i; 176 177 err = regmap_bulk_read(data->regmap, ADM9240_REG_IN(0), &data->in[0], 6); 178 if (err < 0) 179 return err; 180 err = regmap_bulk_read(data->regmap, ADM9240_REG_INT(0), ®s, 2); 181 if (err < 0) 182 return err; 183 184 data->alarms = regs[0] | regs[1] << 8; 185 186 /* 187 * read temperature: assume temperature changes less than 188 * 0.5'C per two measurement cycles thus ignore possible 189 * but unlikely aliasing error on lsb reading. --Grant 190 */ 191 err = regmap_read(data->regmap, ADM9240_REG_TEMP, &val); 192 if (err < 0) 193 return err; 194 data->temp = val << 8; 195 err = regmap_read(data->regmap, ADM9240_REG_TEMP_CONF, &val); 196 if (err < 0) 197 return err; 198 data->temp |= val; 199 200 err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN(0), 201 &data->fan[0], 2); 202 if (err < 0) 203 return err; 204 205 for (i = 0; i < 2; i++) { /* read fans */ 206 /* adjust fan clock divider on overflow */ 207 if (data->valid && data->fan[i] == 255 && 208 data->fan_div[i] < 3) { 209 210 err = adm9240_write_fan_div(data, i, 211 ++data->fan_div[i]); 212 if (err < 0) 213 return err; 214 215 /* adjust fan_min if active, but not to 0 */ 216 if (data->fan_min[i] < 255 && 217 data->fan_min[i] >= 2) 218 data->fan_min[i] /= 2; 219 } 220 } 221 222 return 0; 223 } 224 225 static int adm9240_update_config(struct adm9240_data *data) 226 { 227 unsigned int val; 228 int i; 229 int err; 230 231 for (i = 0; i < 6; i++) { 232 err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MIN(i), 233 &data->in_min[i], 1); 234 if (err < 0) 235 return err; 236 err = regmap_raw_read(data->regmap, ADM9240_REG_IN_MAX(i), 237 &data->in_max[i], 1); 238 if (err < 0) 239 return err; 240 } 241 err = regmap_bulk_read(data->regmap, ADM9240_REG_FAN_MIN(0), 242 &data->fan_min[0], 2); 243 if (err < 0) 244 return err; 245 err = regmap_bulk_read(data->regmap, ADM9240_REG_TEMP_MAX(0), 246 &data->temp_max[0], 2); 247 if (err < 0) 248 return err; 249 250 /* read fan divs and 5-bit VID */ 251 err = regmap_read(data->regmap, ADM9240_REG_VID_FAN_DIV, &val); 252 if (err < 0) 253 return err; 254 data->fan_div[0] = (val >> 4) & 3; 255 data->fan_div[1] = (val >> 6) & 3; 256 data->vid = val & 0x0f; 257 err = regmap_read(data->regmap, ADM9240_REG_VID4, &val); 258 if (err < 0) 259 return err; 260 data->vid |= (val & 1) << 4; 261 /* read analog out */ 262 err = regmap_raw_read(data->regmap, ADM9240_REG_ANALOG_OUT, 263 &data->aout, 1); 264 265 return err; 266 } 267 268 static struct adm9240_data *adm9240_update_device(struct device *dev) 269 { 270 struct adm9240_data *data = dev_get_drvdata(dev); 271 int err; 272 273 mutex_lock(&data->update_lock); 274 275 /* minimum measurement cycle: 1.75 seconds */ 276 if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) 277 || !data->valid) { 278 err = adm9240_update_measure(data); 279 if (err < 0) { 280 data->valid = 0; 281 mutex_unlock(&data->update_lock); 282 return ERR_PTR(err); 283 } 284 data->last_updated_measure = jiffies; 285 } 286 287 /* minimum config reading cycle: 300 seconds */ 288 if (time_after(jiffies, data->last_updated_config + (HZ * 300)) 289 || !data->valid) { 290 err = adm9240_update_config(data); 291 if (err < 0) { 292 data->valid = 0; 293 mutex_unlock(&data->update_lock); 294 return ERR_PTR(err); 295 } 296 data->last_updated_config = jiffies; 297 data->valid = 1; 298 } 299 mutex_unlock(&data->update_lock); 300 return data; 301 } 302 303 /*** sysfs accessors ***/ 304 305 /* temperature */ 306 static ssize_t temp1_input_show(struct device *dev, 307 struct device_attribute *dummy, char *buf) 308 { 309 struct adm9240_data *data = adm9240_update_device(dev); 310 311 if (IS_ERR(data)) 312 return PTR_ERR(data); 313 314 return sprintf(buf, "%d\n", data->temp / 128 * 500); /* 9-bit value */ 315 } 316 317 static ssize_t max_show(struct device *dev, struct device_attribute *devattr, 318 char *buf) 319 { 320 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 321 struct adm9240_data *data = adm9240_update_device(dev); 322 323 if (IS_ERR(data)) 324 return PTR_ERR(data); 325 326 return sprintf(buf, "%d\n", data->temp_max[attr->index] * 1000); 327 } 328 329 static ssize_t max_store(struct device *dev, struct device_attribute *devattr, 330 const char *buf, size_t count) 331 { 332 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 333 struct adm9240_data *data = dev_get_drvdata(dev); 334 long val; 335 int err; 336 337 err = kstrtol(buf, 10, &val); 338 if (err) 339 return err; 340 341 mutex_lock(&data->update_lock); 342 data->temp_max[attr->index] = TEMP_TO_REG(val); 343 err = regmap_write(data->regmap, ADM9240_REG_TEMP_MAX(attr->index), 344 data->temp_max[attr->index]); 345 mutex_unlock(&data->update_lock); 346 return err < 0 ? err : count; 347 } 348 349 static DEVICE_ATTR_RO(temp1_input); 350 static SENSOR_DEVICE_ATTR_RW(temp1_max, max, 0); 351 static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, max, 1); 352 353 /* voltage */ 354 static ssize_t in_show(struct device *dev, struct device_attribute *devattr, 355 char *buf) 356 { 357 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 358 struct adm9240_data *data = adm9240_update_device(dev); 359 360 if (IS_ERR(data)) 361 return PTR_ERR(data); 362 363 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[attr->index], 364 attr->index)); 365 } 366 367 static ssize_t in_min_show(struct device *dev, 368 struct device_attribute *devattr, char *buf) 369 { 370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 371 struct adm9240_data *data = adm9240_update_device(dev); 372 373 if (IS_ERR(data)) 374 return PTR_ERR(data); 375 376 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[attr->index], 377 attr->index)); 378 } 379 380 static ssize_t in_max_show(struct device *dev, 381 struct device_attribute *devattr, char *buf) 382 { 383 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 384 struct adm9240_data *data = adm9240_update_device(dev); 385 386 if (IS_ERR(data)) 387 return PTR_ERR(data); 388 389 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[attr->index], 390 attr->index)); 391 } 392 393 static ssize_t in_min_store(struct device *dev, 394 struct device_attribute *devattr, const char *buf, 395 size_t count) 396 { 397 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 398 struct adm9240_data *data = dev_get_drvdata(dev); 399 unsigned long val; 400 int err; 401 402 err = kstrtoul(buf, 10, &val); 403 if (err) 404 return err; 405 406 mutex_lock(&data->update_lock); 407 data->in_min[attr->index] = IN_TO_REG(val, attr->index); 408 err = regmap_write(data->regmap, ADM9240_REG_IN_MIN(attr->index), 409 data->in_min[attr->index]); 410 mutex_unlock(&data->update_lock); 411 return err < 0 ? err : count; 412 } 413 414 static ssize_t in_max_store(struct device *dev, 415 struct device_attribute *devattr, const char *buf, 416 size_t count) 417 { 418 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 419 struct adm9240_data *data = dev_get_drvdata(dev); 420 unsigned long val; 421 int err; 422 423 err = kstrtoul(buf, 10, &val); 424 if (err) 425 return err; 426 427 mutex_lock(&data->update_lock); 428 data->in_max[attr->index] = IN_TO_REG(val, attr->index); 429 err = regmap_write(data->regmap, ADM9240_REG_IN_MAX(attr->index), 430 data->in_max[attr->index]); 431 mutex_unlock(&data->update_lock); 432 return err < 0 ? err : count; 433 } 434 435 static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); 436 static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); 437 static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); 438 static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); 439 static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); 440 static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); 441 static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); 442 static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); 443 static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); 444 static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); 445 static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); 446 static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); 447 static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); 448 static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); 449 static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); 450 static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); 451 static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); 452 static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); 453 454 /* fans */ 455 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr, 456 char *buf) 457 { 458 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 459 struct adm9240_data *data = adm9240_update_device(dev); 460 461 if (IS_ERR(data)) 462 return PTR_ERR(data); 463 464 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index], 465 1 << data->fan_div[attr->index])); 466 } 467 468 static ssize_t fan_min_show(struct device *dev, 469 struct device_attribute *devattr, char *buf) 470 { 471 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 472 struct adm9240_data *data = adm9240_update_device(dev); 473 474 if (IS_ERR(data)) 475 return PTR_ERR(data); 476 477 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[attr->index], 478 1 << data->fan_div[attr->index])); 479 } 480 481 static ssize_t fan_div_show(struct device *dev, 482 struct device_attribute *devattr, char *buf) 483 { 484 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 485 struct adm9240_data *data = adm9240_update_device(dev); 486 487 if (IS_ERR(data)) 488 return PTR_ERR(data); 489 490 return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); 491 } 492 493 /* 494 * set fan speed low limit: 495 * 496 * - value is zero: disable fan speed low limit alarm 497 * 498 * - value is below fan speed measurement range: enable fan speed low 499 * limit alarm to be asserted while fan speed too slow to measure 500 * 501 * - otherwise: select fan clock divider to suit fan speed low limit, 502 * measurement code may adjust registers to ensure fan speed reading 503 */ 504 static ssize_t fan_min_store(struct device *dev, 505 struct device_attribute *devattr, 506 const char *buf, size_t count) 507 { 508 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 509 struct adm9240_data *data = dev_get_drvdata(dev); 510 struct i2c_client *client = data->client; 511 int nr = attr->index; 512 u8 new_div; 513 unsigned long val; 514 int err; 515 516 err = kstrtoul(buf, 10, &val); 517 if (err) 518 return err; 519 520 mutex_lock(&data->update_lock); 521 522 if (!val) { 523 data->fan_min[nr] = 255; 524 new_div = data->fan_div[nr]; 525 526 dev_dbg(&client->dev, "fan%u low limit set disabled\n", 527 nr + 1); 528 529 } else if (val < 1350000 / (8 * 254)) { 530 new_div = 3; 531 data->fan_min[nr] = 254; 532 533 dev_dbg(&client->dev, "fan%u low limit set minimum %u\n", 534 nr + 1, FAN_FROM_REG(254, 1 << new_div)); 535 536 } else { 537 unsigned int new_min = 1350000 / val; 538 539 new_div = 0; 540 while (new_min > 192 && new_div < 3) { 541 new_div++; 542 new_min /= 2; 543 } 544 if (!new_min) /* keep > 0 */ 545 new_min++; 546 547 data->fan_min[nr] = new_min; 548 549 dev_dbg(&client->dev, "fan%u low limit set fan speed %u\n", 550 nr + 1, FAN_FROM_REG(new_min, 1 << new_div)); 551 } 552 553 if (new_div != data->fan_div[nr]) { 554 data->fan_div[nr] = new_div; 555 adm9240_write_fan_div(data, nr, new_div); 556 } 557 err = regmap_write(data->regmap, ADM9240_REG_FAN_MIN(nr), 558 data->fan_min[nr]); 559 560 mutex_unlock(&data->update_lock); 561 return err < 0 ? err : count; 562 } 563 564 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); 565 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); 566 static SENSOR_DEVICE_ATTR_RO(fan1_div, fan_div, 0); 567 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); 568 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); 569 static SENSOR_DEVICE_ATTR_RO(fan2_div, fan_div, 1); 570 571 /* alarms */ 572 static ssize_t alarms_show(struct device *dev, 573 struct device_attribute *attr, char *buf) 574 { 575 struct adm9240_data *data = adm9240_update_device(dev); 576 577 if (IS_ERR(data)) 578 return PTR_ERR(data); 579 580 return sprintf(buf, "%u\n", data->alarms); 581 } 582 static DEVICE_ATTR_RO(alarms); 583 584 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, 585 char *buf) 586 { 587 int bitnr = to_sensor_dev_attr(attr)->index; 588 struct adm9240_data *data = adm9240_update_device(dev); 589 590 if (IS_ERR(data)) 591 return PTR_ERR(data); 592 593 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 594 } 595 static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); 596 static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); 597 static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); 598 static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); 599 static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); 600 static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9); 601 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4); 602 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6); 603 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7); 604 605 /* vid */ 606 static ssize_t cpu0_vid_show(struct device *dev, 607 struct device_attribute *attr, char *buf) 608 { 609 struct adm9240_data *data = adm9240_update_device(dev); 610 611 if (IS_ERR(data)) 612 return PTR_ERR(data); 613 614 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); 615 } 616 static DEVICE_ATTR_RO(cpu0_vid); 617 618 /* analog output */ 619 static ssize_t aout_output_show(struct device *dev, 620 struct device_attribute *attr, char *buf) 621 { 622 struct adm9240_data *data = adm9240_update_device(dev); 623 624 if (IS_ERR(data)) 625 return PTR_ERR(data); 626 627 return sprintf(buf, "%d\n", AOUT_FROM_REG(data->aout)); 628 } 629 630 static ssize_t aout_output_store(struct device *dev, 631 struct device_attribute *attr, 632 const char *buf, size_t count) 633 { 634 struct adm9240_data *data = dev_get_drvdata(dev); 635 long val; 636 int err; 637 638 err = kstrtol(buf, 10, &val); 639 if (err) 640 return err; 641 642 mutex_lock(&data->update_lock); 643 data->aout = AOUT_TO_REG(val); 644 err = regmap_write(data->regmap, ADM9240_REG_ANALOG_OUT, data->aout); 645 mutex_unlock(&data->update_lock); 646 return err < 0 ? err : count; 647 } 648 static DEVICE_ATTR_RW(aout_output); 649 650 static ssize_t alarm_store(struct device *dev, struct device_attribute *attr, 651 const char *buf, size_t count) 652 { 653 struct adm9240_data *data = dev_get_drvdata(dev); 654 unsigned long val; 655 int err; 656 657 if (kstrtoul(buf, 10, &val) || val != 0) 658 return -EINVAL; 659 660 mutex_lock(&data->update_lock); 661 err = regmap_write(data->regmap, ADM9240_REG_CHASSIS_CLEAR, 0x80); 662 data->valid = 0; /* Force cache refresh */ 663 mutex_unlock(&data->update_lock); 664 if (err < 0) 665 return err; 666 dev_dbg(&data->client->dev, "chassis intrusion latch cleared\n"); 667 668 return count; 669 } 670 static SENSOR_DEVICE_ATTR_RW(intrusion0_alarm, alarm, 12); 671 672 static struct attribute *adm9240_attrs[] = { 673 &sensor_dev_attr_in0_input.dev_attr.attr, 674 &sensor_dev_attr_in0_min.dev_attr.attr, 675 &sensor_dev_attr_in0_max.dev_attr.attr, 676 &sensor_dev_attr_in0_alarm.dev_attr.attr, 677 &sensor_dev_attr_in1_input.dev_attr.attr, 678 &sensor_dev_attr_in1_min.dev_attr.attr, 679 &sensor_dev_attr_in1_max.dev_attr.attr, 680 &sensor_dev_attr_in1_alarm.dev_attr.attr, 681 &sensor_dev_attr_in2_input.dev_attr.attr, 682 &sensor_dev_attr_in2_min.dev_attr.attr, 683 &sensor_dev_attr_in2_max.dev_attr.attr, 684 &sensor_dev_attr_in2_alarm.dev_attr.attr, 685 &sensor_dev_attr_in3_input.dev_attr.attr, 686 &sensor_dev_attr_in3_min.dev_attr.attr, 687 &sensor_dev_attr_in3_max.dev_attr.attr, 688 &sensor_dev_attr_in3_alarm.dev_attr.attr, 689 &sensor_dev_attr_in4_input.dev_attr.attr, 690 &sensor_dev_attr_in4_min.dev_attr.attr, 691 &sensor_dev_attr_in4_max.dev_attr.attr, 692 &sensor_dev_attr_in4_alarm.dev_attr.attr, 693 &sensor_dev_attr_in5_input.dev_attr.attr, 694 &sensor_dev_attr_in5_min.dev_attr.attr, 695 &sensor_dev_attr_in5_max.dev_attr.attr, 696 &sensor_dev_attr_in5_alarm.dev_attr.attr, 697 &dev_attr_temp1_input.attr, 698 &sensor_dev_attr_temp1_max.dev_attr.attr, 699 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr, 700 &sensor_dev_attr_temp1_alarm.dev_attr.attr, 701 &sensor_dev_attr_fan1_input.dev_attr.attr, 702 &sensor_dev_attr_fan1_div.dev_attr.attr, 703 &sensor_dev_attr_fan1_min.dev_attr.attr, 704 &sensor_dev_attr_fan1_alarm.dev_attr.attr, 705 &sensor_dev_attr_fan2_input.dev_attr.attr, 706 &sensor_dev_attr_fan2_div.dev_attr.attr, 707 &sensor_dev_attr_fan2_min.dev_attr.attr, 708 &sensor_dev_attr_fan2_alarm.dev_attr.attr, 709 &dev_attr_alarms.attr, 710 &dev_attr_aout_output.attr, 711 &sensor_dev_attr_intrusion0_alarm.dev_attr.attr, 712 &dev_attr_cpu0_vid.attr, 713 NULL 714 }; 715 716 ATTRIBUTE_GROUPS(adm9240); 717 718 /*** sensor chip detect and driver install ***/ 719 720 /* Return 0 if detection is successful, -ENODEV otherwise */ 721 static int adm9240_detect(struct i2c_client *new_client, 722 struct i2c_board_info *info) 723 { 724 struct i2c_adapter *adapter = new_client->adapter; 725 const char *name = ""; 726 int address = new_client->addr; 727 u8 man_id, die_rev; 728 729 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 730 return -ENODEV; 731 732 /* verify chip: reg address should match i2c address */ 733 if (i2c_smbus_read_byte_data(new_client, ADM9240_REG_I2C_ADDR) 734 != address) { 735 dev_err(&adapter->dev, "detect fail: address match, 0x%02x\n", 736 address); 737 return -ENODEV; 738 } 739 740 /* check known chip manufacturer */ 741 man_id = i2c_smbus_read_byte_data(new_client, ADM9240_REG_MAN_ID); 742 if (man_id == 0x23) { 743 name = "adm9240"; 744 } else if (man_id == 0xda) { 745 name = "ds1780"; 746 } else if (man_id == 0x01) { 747 name = "lm81"; 748 } else { 749 dev_err(&adapter->dev, "detect fail: unknown manuf, 0x%02x\n", 750 man_id); 751 return -ENODEV; 752 } 753 754 /* successful detect, print chip info */ 755 die_rev = i2c_smbus_read_byte_data(new_client, ADM9240_REG_DIE_REV); 756 dev_info(&adapter->dev, "found %s revision %u\n", 757 man_id == 0x23 ? "ADM9240" : 758 man_id == 0xda ? "DS1780" : "LM81", die_rev); 759 760 strlcpy(info->type, name, I2C_NAME_SIZE); 761 762 return 0; 763 } 764 765 static int adm9240_init_client(struct i2c_client *client, struct adm9240_data *data) 766 { 767 u8 conf, mode; 768 int err; 769 770 err = regmap_raw_read(data->regmap, ADM9240_REG_CONFIG, &conf, 1); 771 if (err < 0) 772 return err; 773 err = regmap_raw_read(data->regmap, ADM9240_REG_TEMP_CONF, &mode, 1); 774 if (err < 0) 775 return err; 776 mode &= 3; 777 778 data->vrm = vid_which_vrm(); /* need this to report vid as mV */ 779 780 dev_info(&client->dev, "Using VRM: %d.%d\n", data->vrm / 10, 781 data->vrm % 10); 782 783 if (conf & 1) { /* measurement cycle running: report state */ 784 785 dev_info(&client->dev, "status: config 0x%02x mode %u\n", 786 conf, mode); 787 788 } else { /* cold start: open limits before starting chip */ 789 int i; 790 791 for (i = 0; i < 6; i++) { 792 err = regmap_write(data->regmap, 793 ADM9240_REG_IN_MIN(i), 0); 794 if (err < 0) 795 return err; 796 err = regmap_write(data->regmap, 797 ADM9240_REG_IN_MAX(i), 255); 798 if (err < 0) 799 return err; 800 } 801 for (i = 0; i < 2; i++) { 802 err = regmap_write(data->regmap, 803 ADM9240_REG_FAN_MIN(i), 255); 804 if (err < 0) 805 return err; 806 } 807 for (i = 0; i < 2; i++) { 808 err = regmap_write(data->regmap, 809 ADM9240_REG_TEMP_MAX(i), 127); 810 if (err < 0) 811 return err; 812 } 813 814 /* start measurement cycle */ 815 err = regmap_write(data->regmap, ADM9240_REG_CONFIG, 1); 816 if (err < 0) 817 return err; 818 819 dev_info(&client->dev, 820 "cold start: config was 0x%02x mode %u\n", conf, mode); 821 } 822 823 return 0; 824 } 825 826 static const struct regmap_config adm9240_regmap_config = { 827 .reg_bits = 8, 828 .val_bits = 8, 829 .use_single_read = true, 830 .use_single_write = true, 831 }; 832 833 static int adm9240_probe(struct i2c_client *new_client) 834 { 835 struct device *dev = &new_client->dev; 836 struct device *hwmon_dev; 837 struct adm9240_data *data; 838 int err; 839 840 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); 841 if (!data) 842 return -ENOMEM; 843 844 data->client = new_client; 845 mutex_init(&data->update_lock); 846 data->regmap = devm_regmap_init_i2c(new_client, &adm9240_regmap_config); 847 if (IS_ERR(data->regmap)) 848 return PTR_ERR(data->regmap); 849 850 err = adm9240_init_client(new_client, data); 851 if (err < 0) 852 return err; 853 854 hwmon_dev = devm_hwmon_device_register_with_groups(dev, 855 new_client->name, 856 data, 857 adm9240_groups); 858 return PTR_ERR_OR_ZERO(hwmon_dev); 859 } 860 861 static const struct i2c_device_id adm9240_id[] = { 862 { "adm9240", adm9240 }, 863 { "ds1780", ds1780 }, 864 { "lm81", lm81 }, 865 { } 866 }; 867 MODULE_DEVICE_TABLE(i2c, adm9240_id); 868 869 static struct i2c_driver adm9240_driver = { 870 .class = I2C_CLASS_HWMON, 871 .driver = { 872 .name = "adm9240", 873 }, 874 .probe_new = adm9240_probe, 875 .id_table = adm9240_id, 876 .detect = adm9240_detect, 877 .address_list = normal_i2c, 878 }; 879 880 module_i2c_driver(adm9240_driver); 881 882 MODULE_AUTHOR("Michiel Rook <michiel@grendelproject.nl>, " 883 "Grant Coady <gcoady.lk@gmail.com> and others"); 884 MODULE_DESCRIPTION("ADM9240/DS1780/LM81 driver"); 885 MODULE_LICENSE("GPL"); 886