1 /* 2 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller 3 * and Digital Power Monitor 4 * 5 * Copyright (c) 2011 Ericsson AB. 6 * Copyright (c) 2018 Guenter Roeck 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/init.h> 22 #include <linux/err.h> 23 #include <linux/slab.h> 24 #include <linux/i2c.h> 25 #include <linux/bitops.h> 26 #include "pmbus.h" 27 28 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 }; 29 30 #define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0) 31 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5) 32 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6) 33 34 #define ADM1275_PEAK_IOUT 0xd0 35 #define ADM1275_PEAK_VIN 0xd1 36 #define ADM1275_PEAK_VOUT 0xd2 37 #define ADM1275_PMON_CONFIG 0xd4 38 39 #define ADM1275_VIN_VOUT_SELECT BIT(6) 40 #define ADM1275_VRANGE BIT(5) 41 #define ADM1075_IRANGE_50 BIT(4) 42 #define ADM1075_IRANGE_25 BIT(3) 43 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4)) 44 45 #define ADM1272_IRANGE BIT(0) 46 47 #define ADM1278_TEMP1_EN BIT(3) 48 #define ADM1278_VIN_EN BIT(2) 49 #define ADM1278_VOUT_EN BIT(1) 50 51 #define ADM1293_IRANGE_25 0 52 #define ADM1293_IRANGE_50 BIT(6) 53 #define ADM1293_IRANGE_100 BIT(7) 54 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7)) 55 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7)) 56 57 #define ADM1293_VIN_SEL_012 BIT(2) 58 #define ADM1293_VIN_SEL_074 BIT(3) 59 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3)) 60 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3)) 61 62 #define ADM1293_VAUX_EN BIT(1) 63 64 #define ADM1278_PEAK_TEMP 0xd7 65 #define ADM1275_IOUT_WARN2_LIMIT 0xd7 66 #define ADM1275_DEVICE_CONFIG 0xd8 67 68 #define ADM1275_IOUT_WARN2_SELECT BIT(4) 69 70 #define ADM1276_PEAK_PIN 0xda 71 #define ADM1075_READ_VAUX 0xdd 72 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde 73 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf 74 #define ADM1293_IOUT_MIN 0xe3 75 #define ADM1293_PIN_MIN 0xe4 76 #define ADM1075_VAUX_STATUS 0xf6 77 78 #define ADM1075_VAUX_OV_WARN BIT(7) 79 #define ADM1075_VAUX_UV_WARN BIT(6) 80 81 struct adm1275_data { 82 int id; 83 bool have_oc_fault; 84 bool have_uc_fault; 85 bool have_vout; 86 bool have_vaux_status; 87 bool have_mfr_vaux_status; 88 bool have_iout_min; 89 bool have_pin_min; 90 bool have_pin_max; 91 bool have_temp_max; 92 struct pmbus_driver_info info; 93 }; 94 95 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info) 96 97 struct coefficients { 98 s16 m; 99 s16 b; 100 s16 R; 101 }; 102 103 static const struct coefficients adm1075_coefficients[] = { 104 [0] = { 27169, 0, -1 }, /* voltage */ 105 [1] = { 806, 20475, -1 }, /* current, irange25 */ 106 [2] = { 404, 20475, -1 }, /* current, irange50 */ 107 [3] = { 8549, 0, -1 }, /* power, irange25 */ 108 [4] = { 4279, 0, -1 }, /* power, irange50 */ 109 }; 110 111 static const struct coefficients adm1272_coefficients[] = { 112 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */ 113 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */ 114 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */ 115 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */ 116 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */ 117 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */ 118 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */ 119 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */ 120 [8] = { 42, 31871, -1 }, /* temperature */ 121 122 }; 123 124 static const struct coefficients adm1275_coefficients[] = { 125 [0] = { 19199, 0, -2 }, /* voltage, vrange set */ 126 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */ 127 [2] = { 807, 20475, -1 }, /* current */ 128 }; 129 130 static const struct coefficients adm1276_coefficients[] = { 131 [0] = { 19199, 0, -2 }, /* voltage, vrange set */ 132 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */ 133 [2] = { 807, 20475, -1 }, /* current */ 134 [3] = { 6043, 0, -2 }, /* power, vrange set */ 135 [4] = { 2115, 0, -1 }, /* power, vrange not set */ 136 }; 137 138 static const struct coefficients adm1278_coefficients[] = { 139 [0] = { 19599, 0, -2 }, /* voltage */ 140 [1] = { 800, 20475, -1 }, /* current */ 141 [2] = { 6123, 0, -2 }, /* power */ 142 [3] = { 42, 31880, -1 }, /* temperature */ 143 }; 144 145 static const struct coefficients adm1293_coefficients[] = { 146 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */ 147 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */ 148 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */ 149 [3] = { 8000, -100, -2 }, /* current, irange25 */ 150 [4] = { 4000, -100, -2 }, /* current, irange50 */ 151 [5] = { 20000, -1000, -3 }, /* current, irange100 */ 152 [6] = { 10000, -1000, -3 }, /* current, irange200 */ 153 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */ 154 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */ 155 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */ 156 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */ 157 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */ 158 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */ 159 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */ 160 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */ 161 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */ 162 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */ 163 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */ 164 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */ 165 }; 166 167 static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) 168 { 169 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 170 const struct adm1275_data *data = to_adm1275_data(info); 171 int ret = 0; 172 173 if (page > 0) 174 return -ENXIO; 175 176 switch (reg) { 177 case PMBUS_IOUT_UC_FAULT_LIMIT: 178 if (!data->have_uc_fault) 179 return -ENXIO; 180 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); 181 break; 182 case PMBUS_IOUT_OC_FAULT_LIMIT: 183 if (!data->have_oc_fault) 184 return -ENXIO; 185 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); 186 break; 187 case PMBUS_VOUT_OV_WARN_LIMIT: 188 if (data->have_vout) 189 return -ENODATA; 190 ret = pmbus_read_word_data(client, 0, 191 ADM1075_VAUX_OV_WARN_LIMIT); 192 break; 193 case PMBUS_VOUT_UV_WARN_LIMIT: 194 if (data->have_vout) 195 return -ENODATA; 196 ret = pmbus_read_word_data(client, 0, 197 ADM1075_VAUX_UV_WARN_LIMIT); 198 break; 199 case PMBUS_READ_VOUT: 200 if (data->have_vout) 201 return -ENODATA; 202 ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX); 203 break; 204 case PMBUS_VIRT_READ_IOUT_MIN: 205 if (!data->have_iout_min) 206 return -ENXIO; 207 ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN); 208 break; 209 case PMBUS_VIRT_READ_IOUT_MAX: 210 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT); 211 break; 212 case PMBUS_VIRT_READ_VOUT_MAX: 213 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT); 214 break; 215 case PMBUS_VIRT_READ_VIN_MAX: 216 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN); 217 break; 218 case PMBUS_VIRT_READ_PIN_MIN: 219 if (!data->have_pin_min) 220 return -ENXIO; 221 ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN); 222 break; 223 case PMBUS_VIRT_READ_PIN_MAX: 224 if (!data->have_pin_max) 225 return -ENXIO; 226 ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN); 227 break; 228 case PMBUS_VIRT_READ_TEMP_MAX: 229 if (!data->have_temp_max) 230 return -ENXIO; 231 ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP); 232 break; 233 case PMBUS_VIRT_RESET_IOUT_HISTORY: 234 case PMBUS_VIRT_RESET_VOUT_HISTORY: 235 case PMBUS_VIRT_RESET_VIN_HISTORY: 236 break; 237 case PMBUS_VIRT_RESET_PIN_HISTORY: 238 if (!data->have_pin_max) 239 return -ENXIO; 240 break; 241 case PMBUS_VIRT_RESET_TEMP_HISTORY: 242 if (!data->have_temp_max) 243 return -ENXIO; 244 break; 245 default: 246 ret = -ENODATA; 247 break; 248 } 249 return ret; 250 } 251 252 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, 253 u16 word) 254 { 255 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 256 const struct adm1275_data *data = to_adm1275_data(info); 257 int ret; 258 259 if (page > 0) 260 return -ENXIO; 261 262 switch (reg) { 263 case PMBUS_IOUT_UC_FAULT_LIMIT: 264 case PMBUS_IOUT_OC_FAULT_LIMIT: 265 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, 266 word); 267 break; 268 case PMBUS_VIRT_RESET_IOUT_HISTORY: 269 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); 270 if (!ret && data->have_iout_min) 271 ret = pmbus_write_word_data(client, 0, 272 ADM1293_IOUT_MIN, 0); 273 break; 274 case PMBUS_VIRT_RESET_VOUT_HISTORY: 275 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0); 276 break; 277 case PMBUS_VIRT_RESET_VIN_HISTORY: 278 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); 279 break; 280 case PMBUS_VIRT_RESET_PIN_HISTORY: 281 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); 282 if (!ret && data->have_pin_min) 283 ret = pmbus_write_word_data(client, 0, 284 ADM1293_PIN_MIN, 0); 285 break; 286 case PMBUS_VIRT_RESET_TEMP_HISTORY: 287 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); 288 break; 289 default: 290 ret = -ENODATA; 291 break; 292 } 293 return ret; 294 } 295 296 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) 297 { 298 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 299 const struct adm1275_data *data = to_adm1275_data(info); 300 int mfr_status, ret; 301 302 if (page > 0) 303 return -ENXIO; 304 305 switch (reg) { 306 case PMBUS_STATUS_IOUT: 307 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); 308 if (ret < 0) 309 break; 310 if (!data->have_oc_fault && !data->have_uc_fault) 311 break; 312 mfr_status = pmbus_read_byte_data(client, page, 313 PMBUS_STATUS_MFR_SPECIFIC); 314 if (mfr_status < 0) 315 return mfr_status; 316 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { 317 ret |= data->have_oc_fault ? 318 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; 319 } 320 break; 321 case PMBUS_STATUS_VOUT: 322 if (data->have_vout) 323 return -ENODATA; 324 ret = 0; 325 if (data->have_vaux_status) { 326 mfr_status = pmbus_read_byte_data(client, 0, 327 ADM1075_VAUX_STATUS); 328 if (mfr_status < 0) 329 return mfr_status; 330 if (mfr_status & ADM1075_VAUX_OV_WARN) 331 ret |= PB_VOLTAGE_OV_WARNING; 332 if (mfr_status & ADM1075_VAUX_UV_WARN) 333 ret |= PB_VOLTAGE_UV_WARNING; 334 } else if (data->have_mfr_vaux_status) { 335 mfr_status = pmbus_read_byte_data(client, page, 336 PMBUS_STATUS_MFR_SPECIFIC); 337 if (mfr_status < 0) 338 return mfr_status; 339 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN) 340 ret |= PB_VOLTAGE_OV_WARNING; 341 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN) 342 ret |= PB_VOLTAGE_UV_WARNING; 343 } 344 break; 345 default: 346 ret = -ENODATA; 347 break; 348 } 349 return ret; 350 } 351 352 static const struct i2c_device_id adm1275_id[] = { 353 { "adm1075", adm1075 }, 354 { "adm1272", adm1272 }, 355 { "adm1275", adm1275 }, 356 { "adm1276", adm1276 }, 357 { "adm1278", adm1278 }, 358 { "adm1293", adm1293 }, 359 { "adm1294", adm1294 }, 360 { } 361 }; 362 MODULE_DEVICE_TABLE(i2c, adm1275_id); 363 364 static int adm1275_probe(struct i2c_client *client, 365 const struct i2c_device_id *id) 366 { 367 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; 368 int config, device_config; 369 int ret; 370 struct pmbus_driver_info *info; 371 struct adm1275_data *data; 372 const struct i2c_device_id *mid; 373 const struct coefficients *coefficients; 374 int vindex = -1, voindex = -1, cindex = -1, pindex = -1; 375 int tindex = -1; 376 u32 shunt; 377 378 if (!i2c_check_functionality(client->adapter, 379 I2C_FUNC_SMBUS_READ_BYTE_DATA 380 | I2C_FUNC_SMBUS_BLOCK_DATA)) 381 return -ENODEV; 382 383 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); 384 if (ret < 0) { 385 dev_err(&client->dev, "Failed to read Manufacturer ID\n"); 386 return ret; 387 } 388 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { 389 dev_err(&client->dev, "Unsupported Manufacturer ID\n"); 390 return -ENODEV; 391 } 392 393 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); 394 if (ret < 0) { 395 dev_err(&client->dev, "Failed to read Manufacturer Model\n"); 396 return ret; 397 } 398 for (mid = adm1275_id; mid->name[0]; mid++) { 399 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) 400 break; 401 } 402 if (!mid->name[0]) { 403 dev_err(&client->dev, "Unsupported device\n"); 404 return -ENODEV; 405 } 406 407 if (id->driver_data != mid->driver_data) 408 dev_notice(&client->dev, 409 "Device mismatch: Configured %s, detected %s\n", 410 id->name, mid->name); 411 412 config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 413 if (config < 0) 414 return config; 415 416 device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG); 417 if (device_config < 0) 418 return device_config; 419 420 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), 421 GFP_KERNEL); 422 if (!data) 423 return -ENOMEM; 424 425 if (of_property_read_u32(client->dev.of_node, 426 "shunt-resistor-micro-ohms", &shunt)) 427 shunt = 1000; /* 1 mOhm if not set via DT */ 428 429 if (shunt == 0) 430 return -EINVAL; 431 432 data->id = mid->driver_data; 433 434 info = &data->info; 435 436 info->pages = 1; 437 info->format[PSC_VOLTAGE_IN] = direct; 438 info->format[PSC_VOLTAGE_OUT] = direct; 439 info->format[PSC_CURRENT_OUT] = direct; 440 info->format[PSC_POWER] = direct; 441 info->format[PSC_TEMPERATURE] = direct; 442 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT; 443 444 info->read_word_data = adm1275_read_word_data; 445 info->read_byte_data = adm1275_read_byte_data; 446 info->write_word_data = adm1275_write_word_data; 447 448 switch (data->id) { 449 case adm1075: 450 if (device_config & ADM1275_IOUT_WARN2_SELECT) 451 data->have_oc_fault = true; 452 else 453 data->have_uc_fault = true; 454 data->have_pin_max = true; 455 data->have_vaux_status = true; 456 457 coefficients = adm1075_coefficients; 458 vindex = 0; 459 switch (config & ADM1075_IRANGE_MASK) { 460 case ADM1075_IRANGE_25: 461 cindex = 1; 462 pindex = 3; 463 break; 464 case ADM1075_IRANGE_50: 465 cindex = 2; 466 pindex = 4; 467 break; 468 default: 469 dev_err(&client->dev, "Invalid input current range"); 470 break; 471 } 472 473 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 474 | PMBUS_HAVE_STATUS_INPUT; 475 if (config & ADM1275_VIN_VOUT_SELECT) 476 info->func[0] |= 477 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 478 break; 479 case adm1272: 480 data->have_vout = true; 481 data->have_pin_max = true; 482 data->have_temp_max = true; 483 484 coefficients = adm1272_coefficients; 485 vindex = (config & ADM1275_VRANGE) ? 1 : 0; 486 cindex = (config & ADM1272_IRANGE) ? 3 : 2; 487 /* pindex depends on the combination of the above */ 488 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) { 489 case 0: 490 default: 491 pindex = 4; 492 break; 493 case ADM1275_VRANGE: 494 pindex = 5; 495 break; 496 case ADM1272_IRANGE: 497 pindex = 6; 498 break; 499 case ADM1275_VRANGE | ADM1272_IRANGE: 500 pindex = 7; 501 break; 502 } 503 tindex = 8; 504 505 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 506 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 507 508 /* Enable VOUT if not enabled (it is disabled by default) */ 509 if (!(config & ADM1278_VOUT_EN)) { 510 config |= ADM1278_VOUT_EN; 511 ret = i2c_smbus_write_byte_data(client, 512 ADM1275_PMON_CONFIG, 513 config); 514 if (ret < 0) { 515 dev_err(&client->dev, 516 "Failed to enable VOUT monitoring\n"); 517 return -ENODEV; 518 } 519 } 520 521 if (config & ADM1278_TEMP1_EN) 522 info->func[0] |= 523 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 524 if (config & ADM1278_VIN_EN) 525 info->func[0] |= PMBUS_HAVE_VIN; 526 break; 527 case adm1275: 528 if (device_config & ADM1275_IOUT_WARN2_SELECT) 529 data->have_oc_fault = true; 530 else 531 data->have_uc_fault = true; 532 data->have_vout = true; 533 534 coefficients = adm1275_coefficients; 535 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 536 cindex = 2; 537 538 if (config & ADM1275_VIN_VOUT_SELECT) 539 info->func[0] |= 540 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 541 else 542 info->func[0] |= 543 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 544 break; 545 case adm1276: 546 if (device_config & ADM1275_IOUT_WARN2_SELECT) 547 data->have_oc_fault = true; 548 else 549 data->have_uc_fault = true; 550 data->have_vout = true; 551 data->have_pin_max = true; 552 553 coefficients = adm1276_coefficients; 554 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 555 cindex = 2; 556 pindex = (config & ADM1275_VRANGE) ? 3 : 4; 557 558 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 559 | PMBUS_HAVE_STATUS_INPUT; 560 if (config & ADM1275_VIN_VOUT_SELECT) 561 info->func[0] |= 562 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 563 break; 564 case adm1278: 565 data->have_vout = true; 566 data->have_pin_max = true; 567 data->have_temp_max = true; 568 569 coefficients = adm1278_coefficients; 570 vindex = 0; 571 cindex = 1; 572 pindex = 2; 573 tindex = 3; 574 575 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 576 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 577 578 /* Enable VOUT if not enabled (it is disabled by default) */ 579 if (!(config & ADM1278_VOUT_EN)) { 580 config |= ADM1278_VOUT_EN; 581 ret = i2c_smbus_write_byte_data(client, 582 ADM1275_PMON_CONFIG, 583 config); 584 if (ret < 0) { 585 dev_err(&client->dev, 586 "Failed to enable VOUT monitoring\n"); 587 return -ENODEV; 588 } 589 } 590 591 if (config & ADM1278_TEMP1_EN) 592 info->func[0] |= 593 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 594 if (config & ADM1278_VIN_EN) 595 info->func[0] |= PMBUS_HAVE_VIN; 596 break; 597 case adm1293: 598 case adm1294: 599 data->have_iout_min = true; 600 data->have_pin_min = true; 601 data->have_pin_max = true; 602 data->have_mfr_vaux_status = true; 603 604 coefficients = adm1293_coefficients; 605 606 voindex = 0; 607 switch (config & ADM1293_VIN_SEL_MASK) { 608 case ADM1293_VIN_SEL_012: /* 1.2V */ 609 vindex = 0; 610 break; 611 case ADM1293_VIN_SEL_074: /* 7.4V */ 612 vindex = 1; 613 break; 614 case ADM1293_VIN_SEL_210: /* 21V */ 615 vindex = 2; 616 break; 617 default: /* disabled */ 618 break; 619 } 620 621 switch (config & ADM1293_IRANGE_MASK) { 622 case ADM1293_IRANGE_25: 623 cindex = 3; 624 break; 625 case ADM1293_IRANGE_50: 626 cindex = 4; 627 break; 628 case ADM1293_IRANGE_100: 629 cindex = 5; 630 break; 631 case ADM1293_IRANGE_200: 632 cindex = 6; 633 break; 634 } 635 636 if (vindex >= 0) 637 pindex = 7 + vindex * 4 + (cindex - 3); 638 639 if (config & ADM1293_VAUX_EN) 640 info->func[0] |= 641 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 642 643 info->func[0] |= PMBUS_HAVE_PIN | 644 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 645 646 break; 647 default: 648 dev_err(&client->dev, "Unsupported device\n"); 649 return -ENODEV; 650 } 651 652 if (voindex < 0) 653 voindex = vindex; 654 if (vindex >= 0) { 655 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m; 656 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b; 657 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R; 658 } 659 if (voindex >= 0) { 660 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m; 661 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b; 662 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R; 663 } 664 if (cindex >= 0) { 665 /* Scale current with sense resistor value */ 666 info->m[PSC_CURRENT_OUT] = 667 coefficients[cindex].m * shunt / 1000; 668 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b; 669 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R; 670 } 671 if (pindex >= 0) { 672 info->m[PSC_POWER] = 673 coefficients[pindex].m * shunt / 1000; 674 info->b[PSC_POWER] = coefficients[pindex].b; 675 info->R[PSC_POWER] = coefficients[pindex].R; 676 } 677 if (tindex >= 0) { 678 info->m[PSC_TEMPERATURE] = coefficients[tindex].m; 679 info->b[PSC_TEMPERATURE] = coefficients[tindex].b; 680 info->R[PSC_TEMPERATURE] = coefficients[tindex].R; 681 } 682 683 return pmbus_do_probe(client, id, info); 684 } 685 686 static struct i2c_driver adm1275_driver = { 687 .driver = { 688 .name = "adm1275", 689 }, 690 .probe = adm1275_probe, 691 .remove = pmbus_do_remove, 692 .id_table = adm1275_id, 693 }; 694 695 module_i2c_driver(adm1275_driver); 696 697 MODULE_AUTHOR("Guenter Roeck"); 698 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); 699 MODULE_LICENSE("GPL"); 700