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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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * adm1025.c * * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> * Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de> * * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 * voltages (including its own power source) and up to two temperatures * (its own plus up to one external one). Voltages are scaled internally * (which is not the common way) with ratios such that the nominal value * of each voltage correspond to a register value of 192 (which means a * resolution of about 0.5% of the nominal value). Temperature values are * reported with a 1 deg resolution and a 3 deg accuracy. Complete * datasheet can be obtained from Analog's website at: * https://www.onsemi.com/PowerSolutions/product.do?id=ADM1025 * * This driver also supports the ADM1025A, which differs from the ADM1025 * only in that it has "open-drain VID inputs while the ADM1025 has * on-chip 100k pull-ups on the VID inputs". It doesn't make any * difference for us. * * This driver also supports the NE1619, a sensor chip made by Philips. * That chip is similar to the ADM1025A, with a few differences. The only * difference that matters to us is that the NE1619 has only two possible * addresses while the ADM1025A has a third one. Complete datasheet can be * obtained from Philips's website at: * http://www.semiconductors.philips.com/pip/NE1619DS.html * * Since the ADM1025 was the first chipset supported by this driver, most * comments will refer to this chipset, but are actually general and * concern all supported chipsets, unless mentioned otherwise. */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/hwmon-vid.h> #include <linux/err.h> #include <linux/mutex.h> /* * Addresses to scan * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. * NE1619 has two possible addresses: 0x2c and 0x2d. */ static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; enum chips { adm1025, ne1619 }; /* * The ADM1025 registers */ #define ADM1025_REG_MAN_ID 0x3E #define ADM1025_REG_CHIP_ID 0x3F #define ADM1025_REG_CONFIG 0x40 #define ADM1025_REG_STATUS1 0x41 #define ADM1025_REG_STATUS2 0x42 #define ADM1025_REG_IN(nr) (0x20 + (nr)) #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) #define ADM1025_REG_VID 0x47 #define ADM1025_REG_VID4 0x49 /* * Conversions and various macros * The ADM1025 uses signed 8-bit values for temperatures. */ static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ (val) >= (scale) * 255 / 192 ? 255 : \ ((val) * 192 + (scale) / 2) / (scale)) #define TEMP_FROM_REG(reg) ((reg) * 1000) #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ (val) >= 126500 ? 127 : \ (((val) < 0 ? (val) - 500 : \ (val) + 500) / 1000)) /* * Client data (each client gets its own) */ struct adm1025_data { struct i2c_client *client; const struct attribute_group *groups[3]; struct mutex update_lock; bool valid; /* false until following fields are valid */ unsigned long last_updated; /* in jiffies */ u8 in[6]; /* register value */ u8 in_max[6]; /* register value */ u8 in_min[6]; /* register value */ s8 temp[2]; /* register value */ s8 temp_min[2]; /* register value */ s8 temp_max[2]; /* register value */ u16 alarms; /* register values, combined */ u8 vid; /* register values, combined */ u8 vrm; }; static struct adm1025_data *adm1025_update_device(struct device *dev) { struct adm1025_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 * 2) || !data->valid) { int i; dev_dbg(&client->dev, "Updating data.\n"); for (i = 0; i < 6; i++) { data->in[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN(i)); data->in_min[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MIN(i)); data->in_max[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MAX(i)); } for (i = 0; i < 2; i++) { data->temp[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP(i)); data->temp_min[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_LOW(i)); data->temp_max[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_HIGH(i)); } data->alarms = i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) | (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) << 8); data->vid = (i2c_smbus_read_byte_data(client, ADM1025_REG_VID) & 0x0f) | ((i2c_smbus_read_byte_data(client, ADM1025_REG_VID4) & 0x01) << 4); data->last_updated = jiffies; data->valid = true; } mutex_unlock(&data->update_lock); return data; } /* * Sysfs stuff */ static ssize_t in_show(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], in_scale[index])); } static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], in_scale[index])); } static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], in_scale[index])); } static ssize_t temp_show(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); } static ssize_t temp_min_show(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); } static ssize_t temp_max_show(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); } static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->in_min[index] = IN_TO_REG(val, in_scale[index]); i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), data->in_min[index]); mutex_unlock(&data->update_lock); return count; } static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->in_max[index] = IN_TO_REG(val, in_scale[index]); i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), data->in_max[index]); mutex_unlock(&data->update_lock); return count; } static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); static ssize_t temp_min_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->temp_min[index] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), data->temp_min[index]); mutex_unlock(&data->update_lock); return count; } static ssize_t temp_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long val; int err; err = kstrtol(buf, 10, &val); if (err) return err; mutex_lock(&data->update_lock); data->temp_max[index] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), data->temp_max[index]); mutex_unlock(&data->update_lock); return count; } static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); static ssize_t alarms_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u\n", data->alarms); } static DEVICE_ATTR_RO(alarms); static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, char *buf) { int bitnr = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); } static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9); static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 5); static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 4); static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14); static ssize_t cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); } static DEVICE_ATTR_RO(cpu0_vid); static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, char *buf) { struct adm1025_data *data = dev_get_drvdata(dev); return sprintf(buf, "%u\n", data->vrm); } static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct adm1025_data *data = dev_get_drvdata(dev); unsigned long val; int err; err = kstrtoul(buf, 10, &val); if (err) return err; if (val > 255) return -EINVAL; data->vrm = val; return count; } static DEVICE_ATTR_RW(vrm); /* * Real code */ static struct attribute *adm1025_attributes[] = { &sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in5_input.dev_attr.attr, &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_in5_min.dev_attr.attr, &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_in5_max.dev_attr.attr, &sensor_dev_attr_in0_alarm.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in5_alarm.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp1_fault.dev_attr.attr, &dev_attr_alarms.attr, &dev_attr_cpu0_vid.attr, &dev_attr_vrm.attr, NULL }; static const struct attribute_group adm1025_group = { .attrs = adm1025_attributes, }; static struct attribute *adm1025_attributes_in4[] = { &sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, &sensor_dev_attr_in4_alarm.dev_attr.attr, NULL }; static const struct attribute_group adm1025_group_in4 = { .attrs = adm1025_attributes_in4, }; /* Return 0 if detection is successful, -ENODEV otherwise */ static int adm1025_detect(struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; const char *name; u8 man_id, chip_id; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; /* Check for unused bits */ if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80) || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0) || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) { dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n", client->addr); return -ENODEV; } /* Identification */ chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); if ((chip_id & 0xF0) != 0x20) return -ENODEV; man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); if (man_id == 0x41) name = "adm1025"; else if (man_id == 0xA1 && client->addr != 0x2E) name = "ne1619"; else return -ENODEV; strscpy(info->type, name, I2C_NAME_SIZE); return 0; } static void adm1025_init_client(struct i2c_client *client) { u8 reg; struct adm1025_data *data = i2c_get_clientdata(client); int i; data->vrm = vid_which_vrm(); /* * Set high limits * Usually we avoid setting limits on driver init, but it happens * that the ADM1025 comes with stupid default limits (all registers * set to 0). In case the chip has not gone through any limit * setting yet, we better set the high limits to the max so that * no alarm triggers. */ for (i = 0; i < 6; i++) { reg = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MAX(i)); if (reg == 0) i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(i), 0xFF); } for (i = 0; i < 2; i++) { reg = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_HIGH(i)); if (reg == 0) i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(i), 0x7F); } /* * Start the conversions */ reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); if (!(reg & 0x01)) i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, (reg&0x7E)|0x01); } static int adm1025_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct device *hwmon_dev; struct adm1025_data *data; u8 config; data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL); if (!data) return -ENOMEM; i2c_set_clientdata(client, data); data->client = client; mutex_init(&data->update_lock); /* Initialize the ADM1025 chip */ adm1025_init_client(client); /* sysfs hooks */ data->groups[0] = &adm1025_group; /* Pin 11 is either in4 (+12V) or VID4 */ config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); if (!(config & 0x20)) data->groups[1] = &adm1025_group_in4; 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 adm1025_id[] = { { "adm1025", adm1025 }, { "ne1619", ne1619 }, { } }; MODULE_DEVICE_TABLE(i2c, adm1025_id); static struct i2c_driver adm1025_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "adm1025", }, .probe_new = adm1025_probe, .id_table = adm1025_id, .detect = adm1025_detect, .address_list = normal_i2c, }; module_i2c_driver(adm1025_driver); MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); MODULE_DESCRIPTION("ADM1025 driver"); MODULE_LICENSE("GPL"); |