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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 | // SPDX-License-Identifier: GPL-2.0-only /* * Driver for * Maxim MAX16065/MAX16066 12-Channel/8-Channel, Flash-Configurable * System Managers with Nonvolatile Fault Registers * Maxim MAX16067/MAX16068 6-Channel, Flash-Configurable System Managers * with Nonvolatile Fault Registers * Maxim MAX16070/MAX16071 12-Channel/8-Channel, Flash-Configurable System * Monitors with Nonvolatile Fault Registers * * Copyright (C) 2011 Ericsson AB. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/jiffies.h> enum chips { max16065, max16066, max16067, max16068, max16070, max16071 }; /* * Registers */ #define MAX16065_ADC(x) ((x) * 2) #define MAX16065_CURR_SENSE 0x18 #define MAX16065_CSP_ADC 0x19 #define MAX16065_FAULT(x) (0x1b + (x)) #define MAX16065_SCALE(x) (0x43 + (x)) #define MAX16065_CURR_CONTROL 0x47 #define MAX16065_LIMIT(l, x) (0x48 + (l) + (x) * 3) /* * l: limit * 0: min/max * 1: crit * 2: lcrit * x: ADC index */ #define MAX16065_SW_ENABLE 0x73 #define MAX16065_WARNING_OV (1 << 3) /* Set if secondary threshold is OV warning */ #define MAX16065_CURR_ENABLE (1 << 0) #define MAX16065_NUM_LIMIT 3 #define MAX16065_NUM_ADC 12 /* maximum number of ADC channels */ static const int max16065_num_adc[] = { [max16065] = 12, [max16066] = 8, [max16067] = 6, [max16068] = 6, [max16070] = 12, [max16071] = 8, }; static const bool max16065_have_secondary[] = { [max16065] = true, [max16066] = true, [max16067] = false, [max16068] = false, [max16070] = true, [max16071] = true, }; static const bool max16065_have_current[] = { [max16065] = true, [max16066] = true, [max16067] = false, [max16068] = false, [max16070] = true, [max16071] = true, }; struct max16065_data { enum chips type; struct i2c_client *client; const struct attribute_group *groups[4]; struct mutex update_lock; bool valid; unsigned long last_updated; /* in jiffies */ int num_adc; bool have_current; int curr_gain; /* limits are in mV */ int limit[MAX16065_NUM_LIMIT][MAX16065_NUM_ADC]; int range[MAX16065_NUM_ADC + 1];/* voltage range */ int adc[MAX16065_NUM_ADC + 1]; /* adc values (raw) including csp_adc */ int curr_sense; int fault[2]; }; static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 }; static const int max16065_csp_adc_range[] = { 7000, 14000 }; /* ADC registers have 10 bit resolution. */ static inline int ADC_TO_MV(int adc, int range) { return (adc * range) / 1024; } /* * Limit registers have 8 bit resolution and match upper 8 bits of ADC * registers. */ static inline int LIMIT_TO_MV(int limit, int range) { return limit * range / 256; } static inline int MV_TO_LIMIT(int mv, int range) { return clamp_val(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255); } static inline int ADC_TO_CURR(int adc, int gain) { return adc * 1400000 / (gain * 255); } /* * max16065_read_adc() * * Read 16 bit value from <reg>, <reg+1>. * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>. */ static int max16065_read_adc(struct i2c_client *client, int reg) { int rv; rv = i2c_smbus_read_word_swapped(client, reg); if (unlikely(rv < 0)) return rv; return rv >> 6; } static struct max16065_data *max16065_update_device(struct device *dev) { struct max16065_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { int i; for (i = 0; i < data->num_adc; i++) data->adc[i] = max16065_read_adc(client, MAX16065_ADC(i)); if (data->have_current) { data->adc[MAX16065_NUM_ADC] = max16065_read_adc(client, MAX16065_CSP_ADC); data->curr_sense = i2c_smbus_read_byte_data(client, MAX16065_CURR_SENSE); } for (i = 0; i < DIV_ROUND_UP(data->num_adc, 8); i++) data->fault[i] = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i)); data->last_updated = jiffies; data->valid = true; } mutex_unlock(&data->update_lock); return data; } static ssize_t max16065_alarm_show(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); struct max16065_data *data = max16065_update_device(dev); int val = data->fault[attr2->nr]; if (val < 0) return val; val &= (1 << attr2->index); if (val) i2c_smbus_write_byte_data(data->client, MAX16065_FAULT(attr2->nr), val); return sysfs_emit(buf, "%d\n", !!val); } static ssize_t max16065_input_show(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct max16065_data *data = max16065_update_device(dev); int adc = data->adc[attr->index]; if (unlikely(adc < 0)) return adc; return sysfs_emit(buf, "%d\n", ADC_TO_MV(adc, data->range[attr->index])); } static ssize_t max16065_current_show(struct device *dev, struct device_attribute *da, char *buf) { struct max16065_data *data = max16065_update_device(dev); if (unlikely(data->curr_sense < 0)) return data->curr_sense; return sysfs_emit(buf, "%d\n", ADC_TO_CURR(data->curr_sense, data->curr_gain)); } static ssize_t max16065_limit_store(struct device *dev, struct device_attribute *da, const char *buf, size_t count) { struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); struct max16065_data *data = dev_get_drvdata(dev); unsigned long val; int err; int limit; err = kstrtoul(buf, 10, &val); if (unlikely(err < 0)) return err; limit = MV_TO_LIMIT(val, data->range[attr2->index]); mutex_lock(&data->update_lock); data->limit[attr2->nr][attr2->index] = LIMIT_TO_MV(limit, data->range[attr2->index]); i2c_smbus_write_byte_data(data->client, MAX16065_LIMIT(attr2->nr, attr2->index), limit); mutex_unlock(&data->update_lock); return count; } static ssize_t max16065_limit_show(struct device *dev, struct device_attribute *da, char *buf) { struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); struct max16065_data *data = dev_get_drvdata(dev); return sysfs_emit(buf, "%d\n", data->limit[attr2->nr][attr2->index]); } /* Construct a sensor_device_attribute structure for each register */ /* Input voltages */ static SENSOR_DEVICE_ATTR_RO(in0_input, max16065_input, 0); static SENSOR_DEVICE_ATTR_RO(in1_input, max16065_input, 1); static SENSOR_DEVICE_ATTR_RO(in2_input, max16065_input, 2); static SENSOR_DEVICE_ATTR_RO(in3_input, max16065_input, 3); static SENSOR_DEVICE_ATTR_RO(in4_input, max16065_input, 4); static SENSOR_DEVICE_ATTR_RO(in5_input, max16065_input, 5); static SENSOR_DEVICE_ATTR_RO(in6_input, max16065_input, 6); static SENSOR_DEVICE_ATTR_RO(in7_input, max16065_input, 7); static SENSOR_DEVICE_ATTR_RO(in8_input, max16065_input, 8); static SENSOR_DEVICE_ATTR_RO(in9_input, max16065_input, 9); static SENSOR_DEVICE_ATTR_RO(in10_input, max16065_input, 10); static SENSOR_DEVICE_ATTR_RO(in11_input, max16065_input, 11); static SENSOR_DEVICE_ATTR_RO(in12_input, max16065_input, 12); /* Input voltages lcrit */ static SENSOR_DEVICE_ATTR_2_RW(in0_lcrit, max16065_limit, 2, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_lcrit, max16065_limit, 2, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_lcrit, max16065_limit, 2, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_lcrit, max16065_limit, 2, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_lcrit, max16065_limit, 2, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_lcrit, max16065_limit, 2, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_lcrit, max16065_limit, 2, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_lcrit, max16065_limit, 2, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_lcrit, max16065_limit, 2, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_lcrit, max16065_limit, 2, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_lcrit, max16065_limit, 2, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_lcrit, max16065_limit, 2, 11); /* Input voltages crit */ static SENSOR_DEVICE_ATTR_2_RW(in0_crit, max16065_limit, 1, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_crit, max16065_limit, 1, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_crit, max16065_limit, 1, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_crit, max16065_limit, 1, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_crit, max16065_limit, 1, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_crit, max16065_limit, 1, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_crit, max16065_limit, 1, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_crit, max16065_limit, 1, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_crit, max16065_limit, 1, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_crit, max16065_limit, 1, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_crit, max16065_limit, 1, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_crit, max16065_limit, 1, 11); /* Input voltages min */ static SENSOR_DEVICE_ATTR_2_RW(in0_min, max16065_limit, 0, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_min, max16065_limit, 0, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_min, max16065_limit, 0, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_min, max16065_limit, 0, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_min, max16065_limit, 0, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_min, max16065_limit, 0, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_min, max16065_limit, 0, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_min, max16065_limit, 0, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_min, max16065_limit, 0, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_min, max16065_limit, 0, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_min, max16065_limit, 0, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_min, max16065_limit, 0, 11); /* Input voltages max */ static SENSOR_DEVICE_ATTR_2_RW(in0_max, max16065_limit, 0, 0); static SENSOR_DEVICE_ATTR_2_RW(in1_max, max16065_limit, 0, 1); static SENSOR_DEVICE_ATTR_2_RW(in2_max, max16065_limit, 0, 2); static SENSOR_DEVICE_ATTR_2_RW(in3_max, max16065_limit, 0, 3); static SENSOR_DEVICE_ATTR_2_RW(in4_max, max16065_limit, 0, 4); static SENSOR_DEVICE_ATTR_2_RW(in5_max, max16065_limit, 0, 5); static SENSOR_DEVICE_ATTR_2_RW(in6_max, max16065_limit, 0, 6); static SENSOR_DEVICE_ATTR_2_RW(in7_max, max16065_limit, 0, 7); static SENSOR_DEVICE_ATTR_2_RW(in8_max, max16065_limit, 0, 8); static SENSOR_DEVICE_ATTR_2_RW(in9_max, max16065_limit, 0, 9); static SENSOR_DEVICE_ATTR_2_RW(in10_max, max16065_limit, 0, 10); static SENSOR_DEVICE_ATTR_2_RW(in11_max, max16065_limit, 0, 11); /* alarms */ static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, max16065_alarm, 0, 0); static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, max16065_alarm, 0, 1); static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, max16065_alarm, 0, 2); static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, max16065_alarm, 0, 3); static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, max16065_alarm, 0, 4); static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, max16065_alarm, 0, 5); static SENSOR_DEVICE_ATTR_2_RO(in6_alarm, max16065_alarm, 0, 6); static SENSOR_DEVICE_ATTR_2_RO(in7_alarm, max16065_alarm, 0, 7); static SENSOR_DEVICE_ATTR_2_RO(in8_alarm, max16065_alarm, 1, 0); static SENSOR_DEVICE_ATTR_2_RO(in9_alarm, max16065_alarm, 1, 1); static SENSOR_DEVICE_ATTR_2_RO(in10_alarm, max16065_alarm, 1, 2); static SENSOR_DEVICE_ATTR_2_RO(in11_alarm, max16065_alarm, 1, 3); /* Current and alarm */ static SENSOR_DEVICE_ATTR_RO(curr1_input, max16065_current, 0); static SENSOR_DEVICE_ATTR_2_RO(curr1_alarm, max16065_alarm, 1, 4); /* * Finally, construct an array of pointers to members of the above objects, * as required for sysfs_create_group() */ static struct attribute *max16065_basic_attributes[] = { &sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in0_lcrit.dev_attr.attr, &sensor_dev_attr_in0_crit.dev_attr.attr, &sensor_dev_attr_in0_alarm.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in1_lcrit.dev_attr.attr, &sensor_dev_attr_in1_crit.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in2_lcrit.dev_attr.attr, &sensor_dev_attr_in2_crit.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in3_lcrit.dev_attr.attr, &sensor_dev_attr_in3_crit.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in4_lcrit.dev_attr.attr, &sensor_dev_attr_in4_crit.dev_attr.attr, &sensor_dev_attr_in4_alarm.dev_attr.attr, &sensor_dev_attr_in5_input.dev_attr.attr, &sensor_dev_attr_in5_lcrit.dev_attr.attr, &sensor_dev_attr_in5_crit.dev_attr.attr, &sensor_dev_attr_in5_alarm.dev_attr.attr, &sensor_dev_attr_in6_input.dev_attr.attr, &sensor_dev_attr_in6_lcrit.dev_attr.attr, &sensor_dev_attr_in6_crit.dev_attr.attr, &sensor_dev_attr_in6_alarm.dev_attr.attr, &sensor_dev_attr_in7_input.dev_attr.attr, &sensor_dev_attr_in7_lcrit.dev_attr.attr, &sensor_dev_attr_in7_crit.dev_attr.attr, &sensor_dev_attr_in7_alarm.dev_attr.attr, &sensor_dev_attr_in8_input.dev_attr.attr, &sensor_dev_attr_in8_lcrit.dev_attr.attr, &sensor_dev_attr_in8_crit.dev_attr.attr, &sensor_dev_attr_in8_alarm.dev_attr.attr, &sensor_dev_attr_in9_input.dev_attr.attr, &sensor_dev_attr_in9_lcrit.dev_attr.attr, &sensor_dev_attr_in9_crit.dev_attr.attr, &sensor_dev_attr_in9_alarm.dev_attr.attr, &sensor_dev_attr_in10_input.dev_attr.attr, &sensor_dev_attr_in10_lcrit.dev_attr.attr, &sensor_dev_attr_in10_crit.dev_attr.attr, &sensor_dev_attr_in10_alarm.dev_attr.attr, &sensor_dev_attr_in11_input.dev_attr.attr, &sensor_dev_attr_in11_lcrit.dev_attr.attr, &sensor_dev_attr_in11_crit.dev_attr.attr, &sensor_dev_attr_in11_alarm.dev_attr.attr, NULL }; static struct attribute *max16065_current_attributes[] = { &sensor_dev_attr_in12_input.dev_attr.attr, &sensor_dev_attr_curr1_input.dev_attr.attr, &sensor_dev_attr_curr1_alarm.dev_attr.attr, NULL }; static struct attribute *max16065_min_attributes[] = { &sensor_dev_attr_in0_min.dev_attr.attr, &sensor_dev_attr_in1_min.dev_attr.attr, &sensor_dev_attr_in2_min.dev_attr.attr, &sensor_dev_attr_in3_min.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in5_min.dev_attr.attr, &sensor_dev_attr_in6_min.dev_attr.attr, &sensor_dev_attr_in7_min.dev_attr.attr, &sensor_dev_attr_in8_min.dev_attr.attr, &sensor_dev_attr_in9_min.dev_attr.attr, &sensor_dev_attr_in10_min.dev_attr.attr, &sensor_dev_attr_in11_min.dev_attr.attr, NULL }; static struct attribute *max16065_max_attributes[] = { &sensor_dev_attr_in0_max.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, &sensor_dev_attr_in2_max.dev_attr.attr, &sensor_dev_attr_in3_max.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, &sensor_dev_attr_in5_max.dev_attr.attr, &sensor_dev_attr_in6_max.dev_attr.attr, &sensor_dev_attr_in7_max.dev_attr.attr, &sensor_dev_attr_in8_max.dev_attr.attr, &sensor_dev_attr_in9_max.dev_attr.attr, &sensor_dev_attr_in10_max.dev_attr.attr, &sensor_dev_attr_in11_max.dev_attr.attr, NULL }; static umode_t max16065_basic_is_visible(struct kobject *kobj, struct attribute *a, int n) { struct device *dev = kobj_to_dev(kobj); struct max16065_data *data = dev_get_drvdata(dev); int index = n / 4; if (index >= data->num_adc || !data->range[index]) return 0; return a->mode; } static umode_t max16065_secondary_is_visible(struct kobject *kobj, struct attribute *a, int index) { struct device *dev = kobj_to_dev(kobj); struct max16065_data *data = dev_get_drvdata(dev); if (index >= data->num_adc) return 0; return a->mode; } static const struct attribute_group max16065_basic_group = { .attrs = max16065_basic_attributes, .is_visible = max16065_basic_is_visible, }; static const struct attribute_group max16065_current_group = { .attrs = max16065_current_attributes, }; static const struct attribute_group max16065_min_group = { .attrs = max16065_min_attributes, .is_visible = max16065_secondary_is_visible, }; static const struct attribute_group max16065_max_group = { .attrs = max16065_max_attributes, .is_visible = max16065_secondary_is_visible, }; static const struct i2c_device_id max16065_id[]; static int max16065_probe(struct i2c_client *client) { struct i2c_adapter *adapter = client->adapter; struct max16065_data *data; struct device *dev = &client->dev; struct device *hwmon_dev; int i, j, val; bool have_secondary; /* true if chip has secondary limits */ bool secondary_is_max = false; /* secondary limits reflect max */ int groups = 0; const struct i2c_device_id *id = i2c_match_id(max16065_id, client); if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_READ_WORD_DATA)) return -ENODEV; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (unlikely(!data)) return -ENOMEM; data->client = client; mutex_init(&data->update_lock); data->num_adc = max16065_num_adc[id->driver_data]; data->have_current = max16065_have_current[id->driver_data]; have_secondary = max16065_have_secondary[id->driver_data]; if (have_secondary) { val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); if (unlikely(val < 0)) return val; secondary_is_max = val & MAX16065_WARNING_OV; } /* Read scale registers, convert to range */ for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) { val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i)); if (unlikely(val < 0)) return val; for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) { data->range[i * 4 + j] = max16065_adc_range[(val >> (j * 2)) & 0x3]; } } /* Read limits */ for (i = 0; i < MAX16065_NUM_LIMIT; i++) { if (i == 0 && !have_secondary) continue; for (j = 0; j < data->num_adc; j++) { val = i2c_smbus_read_byte_data(client, MAX16065_LIMIT(i, j)); if (unlikely(val < 0)) return val; data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); } } /* sysfs hooks */ data->groups[groups++] = &max16065_basic_group; if (have_secondary) data->groups[groups++] = secondary_is_max ? &max16065_max_group : &max16065_min_group; if (data->have_current) { val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); if (unlikely(val < 0)) return val; if (val & MAX16065_CURR_ENABLE) { /* * Current gain is 6, 12, 24, 48 based on values in * bit 2,3. */ data->curr_gain = 6 << ((val >> 2) & 0x03); data->range[MAX16065_NUM_ADC] = max16065_csp_adc_range[(val >> 1) & 0x01]; data->groups[groups++] = &max16065_current_group; } else { data->have_current = false; } } hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, data, data->groups); return PTR_ERR_OR_ZERO(hwmon_dev); } static const struct i2c_device_id max16065_id[] = { { "max16065", max16065 }, { "max16066", max16066 }, { "max16067", max16067 }, { "max16068", max16068 }, { "max16070", max16070 }, { "max16071", max16071 }, { } }; MODULE_DEVICE_TABLE(i2c, max16065_id); /* This is the driver that will be inserted */ static struct i2c_driver max16065_driver = { .driver = { .name = "max16065", }, .probe = max16065_probe, .id_table = max16065_id, }; module_i2c_driver(max16065_driver); MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); MODULE_DESCRIPTION("MAX16065 driver"); MODULE_LICENSE("GPL"); |