1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller 4 * and Digital Power Monitor 5 * 6 * Copyright (c) 2011 Ericsson AB. 7 * Copyright (c) 2018 Guenter Roeck 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/err.h> 14 #include <linux/slab.h> 15 #include <linux/i2c.h> 16 #include <linux/bitops.h> 17 #include <linux/bitfield.h> 18 #include <linux/log2.h> 19 #include "pmbus.h" 20 21 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 }; 22 23 #define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0) 24 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5) 25 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6) 26 27 #define ADM1275_PEAK_IOUT 0xd0 28 #define ADM1275_PEAK_VIN 0xd1 29 #define ADM1275_PEAK_VOUT 0xd2 30 #define ADM1275_PMON_CONFIG 0xd4 31 32 #define ADM1275_VIN_VOUT_SELECT BIT(6) 33 #define ADM1275_VRANGE BIT(5) 34 #define ADM1075_IRANGE_50 BIT(4) 35 #define ADM1075_IRANGE_25 BIT(3) 36 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4)) 37 38 #define ADM1272_IRANGE BIT(0) 39 40 #define ADM1278_TEMP1_EN BIT(3) 41 #define ADM1278_VIN_EN BIT(2) 42 #define ADM1278_VOUT_EN BIT(1) 43 44 #define ADM1293_IRANGE_25 0 45 #define ADM1293_IRANGE_50 BIT(6) 46 #define ADM1293_IRANGE_100 BIT(7) 47 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7)) 48 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7)) 49 50 #define ADM1293_VIN_SEL_012 BIT(2) 51 #define ADM1293_VIN_SEL_074 BIT(3) 52 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3)) 53 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3)) 54 55 #define ADM1293_VAUX_EN BIT(1) 56 57 #define ADM1278_PEAK_TEMP 0xd7 58 #define ADM1275_IOUT_WARN2_LIMIT 0xd7 59 #define ADM1275_DEVICE_CONFIG 0xd8 60 61 #define ADM1275_IOUT_WARN2_SELECT BIT(4) 62 63 #define ADM1276_PEAK_PIN 0xda 64 #define ADM1075_READ_VAUX 0xdd 65 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde 66 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf 67 #define ADM1293_IOUT_MIN 0xe3 68 #define ADM1293_PIN_MIN 0xe4 69 #define ADM1075_VAUX_STATUS 0xf6 70 71 #define ADM1075_VAUX_OV_WARN BIT(7) 72 #define ADM1075_VAUX_UV_WARN BIT(6) 73 74 #define ADM1275_VI_AVG_SHIFT 0 75 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \ 76 ADM1275_VI_AVG_SHIFT) 77 #define ADM1275_SAMPLES_AVG_MAX 128 78 79 #define ADM1278_PWR_AVG_SHIFT 11 80 #define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \ 81 ADM1278_PWR_AVG_SHIFT) 82 #define ADM1278_VI_AVG_SHIFT 8 83 #define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \ 84 ADM1278_VI_AVG_SHIFT) 85 86 struct adm1275_data { 87 int id; 88 bool have_oc_fault; 89 bool have_uc_fault; 90 bool have_vout; 91 bool have_vaux_status; 92 bool have_mfr_vaux_status; 93 bool have_iout_min; 94 bool have_pin_min; 95 bool have_pin_max; 96 bool have_temp_max; 97 bool have_power_sampling; 98 struct pmbus_driver_info info; 99 }; 100 101 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info) 102 103 struct coefficients { 104 s16 m; 105 s16 b; 106 s16 R; 107 }; 108 109 static const struct coefficients adm1075_coefficients[] = { 110 [0] = { 27169, 0, -1 }, /* voltage */ 111 [1] = { 806, 20475, -1 }, /* current, irange25 */ 112 [2] = { 404, 20475, -1 }, /* current, irange50 */ 113 [3] = { 8549, 0, -1 }, /* power, irange25 */ 114 [4] = { 4279, 0, -1 }, /* power, irange50 */ 115 }; 116 117 static const struct coefficients adm1272_coefficients[] = { 118 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */ 119 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */ 120 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */ 121 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */ 122 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */ 123 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */ 124 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */ 125 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */ 126 [8] = { 42, 31871, -1 }, /* temperature */ 127 128 }; 129 130 static const struct coefficients adm1275_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 }; 135 136 static const struct coefficients adm1276_coefficients[] = { 137 [0] = { 19199, 0, -2 }, /* voltage, vrange set */ 138 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */ 139 [2] = { 807, 20475, -1 }, /* current */ 140 [3] = { 6043, 0, -2 }, /* power, vrange set */ 141 [4] = { 2115, 0, -1 }, /* power, vrange not set */ 142 }; 143 144 static const struct coefficients adm1278_coefficients[] = { 145 [0] = { 19599, 0, -2 }, /* voltage */ 146 [1] = { 800, 20475, -1 }, /* current */ 147 [2] = { 6123, 0, -2 }, /* power */ 148 [3] = { 42, 31880, -1 }, /* temperature */ 149 }; 150 151 static const struct coefficients adm1293_coefficients[] = { 152 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */ 153 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */ 154 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */ 155 [3] = { 8000, -100, -2 }, /* current, irange25 */ 156 [4] = { 4000, -100, -2 }, /* current, irange50 */ 157 [5] = { 20000, -1000, -3 }, /* current, irange100 */ 158 [6] = { 10000, -1000, -3 }, /* current, irange200 */ 159 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */ 160 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */ 161 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */ 162 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */ 163 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */ 164 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */ 165 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */ 166 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */ 167 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */ 168 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */ 169 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */ 170 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */ 171 }; 172 173 static int adm1275_read_pmon_config(const struct adm1275_data *data, 174 struct i2c_client *client, bool is_power) 175 { 176 int shift, ret; 177 u16 mask; 178 179 /* 180 * The PMON configuration register is a 16-bit register only on chips 181 * supporting power average sampling. On other chips it is an 8-bit 182 * register. 183 */ 184 if (data->have_power_sampling) { 185 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); 186 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; 187 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; 188 } else { 189 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 190 mask = ADM1275_VI_AVG_MASK; 191 shift = ADM1275_VI_AVG_SHIFT; 192 } 193 if (ret < 0) 194 return ret; 195 196 return (ret & mask) >> shift; 197 } 198 199 static int adm1275_write_pmon_config(const struct adm1275_data *data, 200 struct i2c_client *client, 201 bool is_power, u16 word) 202 { 203 int shift, ret; 204 u16 mask; 205 206 if (data->have_power_sampling) { 207 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); 208 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; 209 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; 210 } else { 211 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 212 mask = ADM1275_VI_AVG_MASK; 213 shift = ADM1275_VI_AVG_SHIFT; 214 } 215 if (ret < 0) 216 return ret; 217 218 word = (ret & ~mask) | ((word << shift) & mask); 219 if (data->have_power_sampling) 220 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, 221 word); 222 else 223 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG, 224 word); 225 226 return ret; 227 } 228 229 static int adm1275_read_word_data(struct i2c_client *client, int page, int reg) 230 { 231 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 232 const struct adm1275_data *data = to_adm1275_data(info); 233 int ret = 0; 234 235 if (page > 0) 236 return -ENXIO; 237 238 switch (reg) { 239 case PMBUS_IOUT_UC_FAULT_LIMIT: 240 if (!data->have_uc_fault) 241 return -ENXIO; 242 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); 243 break; 244 case PMBUS_IOUT_OC_FAULT_LIMIT: 245 if (!data->have_oc_fault) 246 return -ENXIO; 247 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT); 248 break; 249 case PMBUS_VOUT_OV_WARN_LIMIT: 250 if (data->have_vout) 251 return -ENODATA; 252 ret = pmbus_read_word_data(client, 0, 253 ADM1075_VAUX_OV_WARN_LIMIT); 254 break; 255 case PMBUS_VOUT_UV_WARN_LIMIT: 256 if (data->have_vout) 257 return -ENODATA; 258 ret = pmbus_read_word_data(client, 0, 259 ADM1075_VAUX_UV_WARN_LIMIT); 260 break; 261 case PMBUS_READ_VOUT: 262 if (data->have_vout) 263 return -ENODATA; 264 ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX); 265 break; 266 case PMBUS_VIRT_READ_IOUT_MIN: 267 if (!data->have_iout_min) 268 return -ENXIO; 269 ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN); 270 break; 271 case PMBUS_VIRT_READ_IOUT_MAX: 272 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT); 273 break; 274 case PMBUS_VIRT_READ_VOUT_MAX: 275 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT); 276 break; 277 case PMBUS_VIRT_READ_VIN_MAX: 278 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN); 279 break; 280 case PMBUS_VIRT_READ_PIN_MIN: 281 if (!data->have_pin_min) 282 return -ENXIO; 283 ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN); 284 break; 285 case PMBUS_VIRT_READ_PIN_MAX: 286 if (!data->have_pin_max) 287 return -ENXIO; 288 ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN); 289 break; 290 case PMBUS_VIRT_READ_TEMP_MAX: 291 if (!data->have_temp_max) 292 return -ENXIO; 293 ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP); 294 break; 295 case PMBUS_VIRT_RESET_IOUT_HISTORY: 296 case PMBUS_VIRT_RESET_VOUT_HISTORY: 297 case PMBUS_VIRT_RESET_VIN_HISTORY: 298 break; 299 case PMBUS_VIRT_RESET_PIN_HISTORY: 300 if (!data->have_pin_max) 301 return -ENXIO; 302 break; 303 case PMBUS_VIRT_RESET_TEMP_HISTORY: 304 if (!data->have_temp_max) 305 return -ENXIO; 306 break; 307 case PMBUS_VIRT_POWER_SAMPLES: 308 if (!data->have_power_sampling) 309 return -ENXIO; 310 ret = adm1275_read_pmon_config(data, client, true); 311 if (ret < 0) 312 break; 313 ret = BIT(ret); 314 break; 315 case PMBUS_VIRT_IN_SAMPLES: 316 case PMBUS_VIRT_CURR_SAMPLES: 317 ret = adm1275_read_pmon_config(data, client, false); 318 if (ret < 0) 319 break; 320 ret = BIT(ret); 321 break; 322 default: 323 ret = -ENODATA; 324 break; 325 } 326 return ret; 327 } 328 329 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, 330 u16 word) 331 { 332 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 333 const struct adm1275_data *data = to_adm1275_data(info); 334 int ret; 335 336 if (page > 0) 337 return -ENXIO; 338 339 switch (reg) { 340 case PMBUS_IOUT_UC_FAULT_LIMIT: 341 case PMBUS_IOUT_OC_FAULT_LIMIT: 342 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, 343 word); 344 break; 345 case PMBUS_VIRT_RESET_IOUT_HISTORY: 346 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); 347 if (!ret && data->have_iout_min) 348 ret = pmbus_write_word_data(client, 0, 349 ADM1293_IOUT_MIN, 0); 350 break; 351 case PMBUS_VIRT_RESET_VOUT_HISTORY: 352 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0); 353 break; 354 case PMBUS_VIRT_RESET_VIN_HISTORY: 355 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); 356 break; 357 case PMBUS_VIRT_RESET_PIN_HISTORY: 358 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); 359 if (!ret && data->have_pin_min) 360 ret = pmbus_write_word_data(client, 0, 361 ADM1293_PIN_MIN, 0); 362 break; 363 case PMBUS_VIRT_RESET_TEMP_HISTORY: 364 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); 365 break; 366 case PMBUS_VIRT_POWER_SAMPLES: 367 if (!data->have_power_sampling) 368 return -ENXIO; 369 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 370 ret = adm1275_write_pmon_config(data, client, true, 371 ilog2(word)); 372 break; 373 case PMBUS_VIRT_IN_SAMPLES: 374 case PMBUS_VIRT_CURR_SAMPLES: 375 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 376 ret = adm1275_write_pmon_config(data, client, false, 377 ilog2(word)); 378 break; 379 default: 380 ret = -ENODATA; 381 break; 382 } 383 return ret; 384 } 385 386 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) 387 { 388 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 389 const struct adm1275_data *data = to_adm1275_data(info); 390 int mfr_status, ret; 391 392 if (page > 0) 393 return -ENXIO; 394 395 switch (reg) { 396 case PMBUS_STATUS_IOUT: 397 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); 398 if (ret < 0) 399 break; 400 if (!data->have_oc_fault && !data->have_uc_fault) 401 break; 402 mfr_status = pmbus_read_byte_data(client, page, 403 PMBUS_STATUS_MFR_SPECIFIC); 404 if (mfr_status < 0) 405 return mfr_status; 406 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { 407 ret |= data->have_oc_fault ? 408 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; 409 } 410 break; 411 case PMBUS_STATUS_VOUT: 412 if (data->have_vout) 413 return -ENODATA; 414 ret = 0; 415 if (data->have_vaux_status) { 416 mfr_status = pmbus_read_byte_data(client, 0, 417 ADM1075_VAUX_STATUS); 418 if (mfr_status < 0) 419 return mfr_status; 420 if (mfr_status & ADM1075_VAUX_OV_WARN) 421 ret |= PB_VOLTAGE_OV_WARNING; 422 if (mfr_status & ADM1075_VAUX_UV_WARN) 423 ret |= PB_VOLTAGE_UV_WARNING; 424 } else if (data->have_mfr_vaux_status) { 425 mfr_status = pmbus_read_byte_data(client, page, 426 PMBUS_STATUS_MFR_SPECIFIC); 427 if (mfr_status < 0) 428 return mfr_status; 429 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN) 430 ret |= PB_VOLTAGE_OV_WARNING; 431 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN) 432 ret |= PB_VOLTAGE_UV_WARNING; 433 } 434 break; 435 default: 436 ret = -ENODATA; 437 break; 438 } 439 return ret; 440 } 441 442 static const struct i2c_device_id adm1275_id[] = { 443 { "adm1075", adm1075 }, 444 { "adm1272", adm1272 }, 445 { "adm1275", adm1275 }, 446 { "adm1276", adm1276 }, 447 { "adm1278", adm1278 }, 448 { "adm1293", adm1293 }, 449 { "adm1294", adm1294 }, 450 { } 451 }; 452 MODULE_DEVICE_TABLE(i2c, adm1275_id); 453 454 static int adm1275_probe(struct i2c_client *client, 455 const struct i2c_device_id *id) 456 { 457 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; 458 int config, device_config; 459 int ret; 460 struct pmbus_driver_info *info; 461 struct adm1275_data *data; 462 const struct i2c_device_id *mid; 463 const struct coefficients *coefficients; 464 int vindex = -1, voindex = -1, cindex = -1, pindex = -1; 465 int tindex = -1; 466 u32 shunt; 467 468 if (!i2c_check_functionality(client->adapter, 469 I2C_FUNC_SMBUS_READ_BYTE_DATA 470 | I2C_FUNC_SMBUS_BLOCK_DATA)) 471 return -ENODEV; 472 473 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); 474 if (ret < 0) { 475 dev_err(&client->dev, "Failed to read Manufacturer ID\n"); 476 return ret; 477 } 478 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { 479 dev_err(&client->dev, "Unsupported Manufacturer ID\n"); 480 return -ENODEV; 481 } 482 483 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); 484 if (ret < 0) { 485 dev_err(&client->dev, "Failed to read Manufacturer Model\n"); 486 return ret; 487 } 488 for (mid = adm1275_id; mid->name[0]; mid++) { 489 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) 490 break; 491 } 492 if (!mid->name[0]) { 493 dev_err(&client->dev, "Unsupported device\n"); 494 return -ENODEV; 495 } 496 497 if (id->driver_data != mid->driver_data) 498 dev_notice(&client->dev, 499 "Device mismatch: Configured %s, detected %s\n", 500 id->name, mid->name); 501 502 config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 503 if (config < 0) 504 return config; 505 506 device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG); 507 if (device_config < 0) 508 return device_config; 509 510 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), 511 GFP_KERNEL); 512 if (!data) 513 return -ENOMEM; 514 515 if (of_property_read_u32(client->dev.of_node, 516 "shunt-resistor-micro-ohms", &shunt)) 517 shunt = 1000; /* 1 mOhm if not set via DT */ 518 519 if (shunt == 0) 520 return -EINVAL; 521 522 data->id = mid->driver_data; 523 524 info = &data->info; 525 526 info->pages = 1; 527 info->format[PSC_VOLTAGE_IN] = direct; 528 info->format[PSC_VOLTAGE_OUT] = direct; 529 info->format[PSC_CURRENT_OUT] = direct; 530 info->format[PSC_POWER] = direct; 531 info->format[PSC_TEMPERATURE] = direct; 532 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | 533 PMBUS_HAVE_SAMPLES; 534 535 info->read_word_data = adm1275_read_word_data; 536 info->read_byte_data = adm1275_read_byte_data; 537 info->write_word_data = adm1275_write_word_data; 538 539 switch (data->id) { 540 case adm1075: 541 if (device_config & ADM1275_IOUT_WARN2_SELECT) 542 data->have_oc_fault = true; 543 else 544 data->have_uc_fault = true; 545 data->have_pin_max = true; 546 data->have_vaux_status = true; 547 548 coefficients = adm1075_coefficients; 549 vindex = 0; 550 switch (config & ADM1075_IRANGE_MASK) { 551 case ADM1075_IRANGE_25: 552 cindex = 1; 553 pindex = 3; 554 break; 555 case ADM1075_IRANGE_50: 556 cindex = 2; 557 pindex = 4; 558 break; 559 default: 560 dev_err(&client->dev, "Invalid input current range"); 561 break; 562 } 563 564 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 565 | PMBUS_HAVE_STATUS_INPUT; 566 if (config & ADM1275_VIN_VOUT_SELECT) 567 info->func[0] |= 568 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 569 break; 570 case adm1272: 571 data->have_vout = true; 572 data->have_pin_max = true; 573 data->have_temp_max = true; 574 data->have_power_sampling = true; 575 576 coefficients = adm1272_coefficients; 577 vindex = (config & ADM1275_VRANGE) ? 1 : 0; 578 cindex = (config & ADM1272_IRANGE) ? 3 : 2; 579 /* pindex depends on the combination of the above */ 580 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) { 581 case 0: 582 default: 583 pindex = 4; 584 break; 585 case ADM1275_VRANGE: 586 pindex = 5; 587 break; 588 case ADM1272_IRANGE: 589 pindex = 6; 590 break; 591 case ADM1275_VRANGE | ADM1272_IRANGE: 592 pindex = 7; 593 break; 594 } 595 tindex = 8; 596 597 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 598 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 599 600 /* Enable VOUT if not enabled (it is disabled by default) */ 601 if (!(config & ADM1278_VOUT_EN)) { 602 config |= ADM1278_VOUT_EN; 603 ret = i2c_smbus_write_byte_data(client, 604 ADM1275_PMON_CONFIG, 605 config); 606 if (ret < 0) { 607 dev_err(&client->dev, 608 "Failed to enable VOUT monitoring\n"); 609 return -ENODEV; 610 } 611 } 612 613 if (config & ADM1278_TEMP1_EN) 614 info->func[0] |= 615 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 616 if (config & ADM1278_VIN_EN) 617 info->func[0] |= PMBUS_HAVE_VIN; 618 break; 619 case adm1275: 620 if (device_config & ADM1275_IOUT_WARN2_SELECT) 621 data->have_oc_fault = true; 622 else 623 data->have_uc_fault = true; 624 data->have_vout = true; 625 626 coefficients = adm1275_coefficients; 627 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 628 cindex = 2; 629 630 if (config & ADM1275_VIN_VOUT_SELECT) 631 info->func[0] |= 632 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 633 else 634 info->func[0] |= 635 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 636 break; 637 case adm1276: 638 if (device_config & ADM1275_IOUT_WARN2_SELECT) 639 data->have_oc_fault = true; 640 else 641 data->have_uc_fault = true; 642 data->have_vout = true; 643 data->have_pin_max = true; 644 645 coefficients = adm1276_coefficients; 646 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 647 cindex = 2; 648 pindex = (config & ADM1275_VRANGE) ? 3 : 4; 649 650 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 651 | PMBUS_HAVE_STATUS_INPUT; 652 if (config & ADM1275_VIN_VOUT_SELECT) 653 info->func[0] |= 654 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 655 break; 656 case adm1278: 657 data->have_vout = true; 658 data->have_pin_max = true; 659 data->have_temp_max = true; 660 data->have_power_sampling = true; 661 662 coefficients = adm1278_coefficients; 663 vindex = 0; 664 cindex = 1; 665 pindex = 2; 666 tindex = 3; 667 668 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 669 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 670 671 /* Enable VOUT if not enabled (it is disabled by default) */ 672 if (!(config & ADM1278_VOUT_EN)) { 673 config |= ADM1278_VOUT_EN; 674 ret = i2c_smbus_write_byte_data(client, 675 ADM1275_PMON_CONFIG, 676 config); 677 if (ret < 0) { 678 dev_err(&client->dev, 679 "Failed to enable VOUT monitoring\n"); 680 return -ENODEV; 681 } 682 } 683 684 if (config & ADM1278_TEMP1_EN) 685 info->func[0] |= 686 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 687 if (config & ADM1278_VIN_EN) 688 info->func[0] |= PMBUS_HAVE_VIN; 689 break; 690 case adm1293: 691 case adm1294: 692 data->have_iout_min = true; 693 data->have_pin_min = true; 694 data->have_pin_max = true; 695 data->have_mfr_vaux_status = true; 696 data->have_power_sampling = true; 697 698 coefficients = adm1293_coefficients; 699 700 voindex = 0; 701 switch (config & ADM1293_VIN_SEL_MASK) { 702 case ADM1293_VIN_SEL_012: /* 1.2V */ 703 vindex = 0; 704 break; 705 case ADM1293_VIN_SEL_074: /* 7.4V */ 706 vindex = 1; 707 break; 708 case ADM1293_VIN_SEL_210: /* 21V */ 709 vindex = 2; 710 break; 711 default: /* disabled */ 712 break; 713 } 714 715 switch (config & ADM1293_IRANGE_MASK) { 716 case ADM1293_IRANGE_25: 717 cindex = 3; 718 break; 719 case ADM1293_IRANGE_50: 720 cindex = 4; 721 break; 722 case ADM1293_IRANGE_100: 723 cindex = 5; 724 break; 725 case ADM1293_IRANGE_200: 726 cindex = 6; 727 break; 728 } 729 730 if (vindex >= 0) 731 pindex = 7 + vindex * 4 + (cindex - 3); 732 733 if (config & ADM1293_VAUX_EN) 734 info->func[0] |= 735 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 736 737 info->func[0] |= PMBUS_HAVE_PIN | 738 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 739 740 break; 741 default: 742 dev_err(&client->dev, "Unsupported device\n"); 743 return -ENODEV; 744 } 745 746 if (voindex < 0) 747 voindex = vindex; 748 if (vindex >= 0) { 749 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m; 750 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b; 751 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R; 752 } 753 if (voindex >= 0) { 754 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m; 755 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b; 756 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R; 757 } 758 if (cindex >= 0) { 759 /* Scale current with sense resistor value */ 760 info->m[PSC_CURRENT_OUT] = 761 coefficients[cindex].m * shunt / 1000; 762 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b; 763 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R; 764 } 765 if (pindex >= 0) { 766 info->m[PSC_POWER] = 767 coefficients[pindex].m * shunt / 1000; 768 info->b[PSC_POWER] = coefficients[pindex].b; 769 info->R[PSC_POWER] = coefficients[pindex].R; 770 } 771 if (tindex >= 0) { 772 info->m[PSC_TEMPERATURE] = coefficients[tindex].m; 773 info->b[PSC_TEMPERATURE] = coefficients[tindex].b; 774 info->R[PSC_TEMPERATURE] = coefficients[tindex].R; 775 } 776 777 return pmbus_do_probe(client, id, info); 778 } 779 780 static struct i2c_driver adm1275_driver = { 781 .driver = { 782 .name = "adm1275", 783 }, 784 .probe = adm1275_probe, 785 .remove = pmbus_do_remove, 786 .id_table = adm1275_id, 787 }; 788 789 module_i2c_driver(adm1275_driver); 790 791 MODULE_AUTHOR("Guenter Roeck"); 792 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); 793 MODULE_LICENSE("GPL"); 794