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, 230 int phase, int reg) 231 { 232 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 233 const struct adm1275_data *data = to_adm1275_data(info); 234 int ret = 0; 235 236 if (page > 0) 237 return -ENXIO; 238 239 switch (reg) { 240 case PMBUS_IOUT_UC_FAULT_LIMIT: 241 if (!data->have_uc_fault) 242 return -ENXIO; 243 ret = pmbus_read_word_data(client, 0, 0xff, 244 ADM1275_IOUT_WARN2_LIMIT); 245 break; 246 case PMBUS_IOUT_OC_FAULT_LIMIT: 247 if (!data->have_oc_fault) 248 return -ENXIO; 249 ret = pmbus_read_word_data(client, 0, 0xff, 250 ADM1275_IOUT_WARN2_LIMIT); 251 break; 252 case PMBUS_VOUT_OV_WARN_LIMIT: 253 if (data->have_vout) 254 return -ENODATA; 255 ret = pmbus_read_word_data(client, 0, 0xff, 256 ADM1075_VAUX_OV_WARN_LIMIT); 257 break; 258 case PMBUS_VOUT_UV_WARN_LIMIT: 259 if (data->have_vout) 260 return -ENODATA; 261 ret = pmbus_read_word_data(client, 0, 0xff, 262 ADM1075_VAUX_UV_WARN_LIMIT); 263 break; 264 case PMBUS_READ_VOUT: 265 if (data->have_vout) 266 return -ENODATA; 267 ret = pmbus_read_word_data(client, 0, 0xff, 268 ADM1075_READ_VAUX); 269 break; 270 case PMBUS_VIRT_READ_IOUT_MIN: 271 if (!data->have_iout_min) 272 return -ENXIO; 273 ret = pmbus_read_word_data(client, 0, 0xff, 274 ADM1293_IOUT_MIN); 275 break; 276 case PMBUS_VIRT_READ_IOUT_MAX: 277 ret = pmbus_read_word_data(client, 0, 0xff, 278 ADM1275_PEAK_IOUT); 279 break; 280 case PMBUS_VIRT_READ_VOUT_MAX: 281 ret = pmbus_read_word_data(client, 0, 0xff, 282 ADM1275_PEAK_VOUT); 283 break; 284 case PMBUS_VIRT_READ_VIN_MAX: 285 ret = pmbus_read_word_data(client, 0, 0xff, 286 ADM1275_PEAK_VIN); 287 break; 288 case PMBUS_VIRT_READ_PIN_MIN: 289 if (!data->have_pin_min) 290 return -ENXIO; 291 ret = pmbus_read_word_data(client, 0, 0xff, 292 ADM1293_PIN_MIN); 293 break; 294 case PMBUS_VIRT_READ_PIN_MAX: 295 if (!data->have_pin_max) 296 return -ENXIO; 297 ret = pmbus_read_word_data(client, 0, 0xff, 298 ADM1276_PEAK_PIN); 299 break; 300 case PMBUS_VIRT_READ_TEMP_MAX: 301 if (!data->have_temp_max) 302 return -ENXIO; 303 ret = pmbus_read_word_data(client, 0, 0xff, 304 ADM1278_PEAK_TEMP); 305 break; 306 case PMBUS_VIRT_RESET_IOUT_HISTORY: 307 case PMBUS_VIRT_RESET_VOUT_HISTORY: 308 case PMBUS_VIRT_RESET_VIN_HISTORY: 309 break; 310 case PMBUS_VIRT_RESET_PIN_HISTORY: 311 if (!data->have_pin_max) 312 return -ENXIO; 313 break; 314 case PMBUS_VIRT_RESET_TEMP_HISTORY: 315 if (!data->have_temp_max) 316 return -ENXIO; 317 break; 318 case PMBUS_VIRT_POWER_SAMPLES: 319 if (!data->have_power_sampling) 320 return -ENXIO; 321 ret = adm1275_read_pmon_config(data, client, true); 322 if (ret < 0) 323 break; 324 ret = BIT(ret); 325 break; 326 case PMBUS_VIRT_IN_SAMPLES: 327 case PMBUS_VIRT_CURR_SAMPLES: 328 ret = adm1275_read_pmon_config(data, client, false); 329 if (ret < 0) 330 break; 331 ret = BIT(ret); 332 break; 333 default: 334 ret = -ENODATA; 335 break; 336 } 337 return ret; 338 } 339 340 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, 341 u16 word) 342 { 343 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 344 const struct adm1275_data *data = to_adm1275_data(info); 345 int ret; 346 347 if (page > 0) 348 return -ENXIO; 349 350 switch (reg) { 351 case PMBUS_IOUT_UC_FAULT_LIMIT: 352 case PMBUS_IOUT_OC_FAULT_LIMIT: 353 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, 354 word); 355 break; 356 case PMBUS_VIRT_RESET_IOUT_HISTORY: 357 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); 358 if (!ret && data->have_iout_min) 359 ret = pmbus_write_word_data(client, 0, 360 ADM1293_IOUT_MIN, 0); 361 break; 362 case PMBUS_VIRT_RESET_VOUT_HISTORY: 363 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0); 364 break; 365 case PMBUS_VIRT_RESET_VIN_HISTORY: 366 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); 367 break; 368 case PMBUS_VIRT_RESET_PIN_HISTORY: 369 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); 370 if (!ret && data->have_pin_min) 371 ret = pmbus_write_word_data(client, 0, 372 ADM1293_PIN_MIN, 0); 373 break; 374 case PMBUS_VIRT_RESET_TEMP_HISTORY: 375 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); 376 break; 377 case PMBUS_VIRT_POWER_SAMPLES: 378 if (!data->have_power_sampling) 379 return -ENXIO; 380 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 381 ret = adm1275_write_pmon_config(data, client, true, 382 ilog2(word)); 383 break; 384 case PMBUS_VIRT_IN_SAMPLES: 385 case PMBUS_VIRT_CURR_SAMPLES: 386 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 387 ret = adm1275_write_pmon_config(data, client, false, 388 ilog2(word)); 389 break; 390 default: 391 ret = -ENODATA; 392 break; 393 } 394 return ret; 395 } 396 397 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) 398 { 399 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 400 const struct adm1275_data *data = to_adm1275_data(info); 401 int mfr_status, ret; 402 403 if (page > 0) 404 return -ENXIO; 405 406 switch (reg) { 407 case PMBUS_STATUS_IOUT: 408 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); 409 if (ret < 0) 410 break; 411 if (!data->have_oc_fault && !data->have_uc_fault) 412 break; 413 mfr_status = pmbus_read_byte_data(client, page, 414 PMBUS_STATUS_MFR_SPECIFIC); 415 if (mfr_status < 0) 416 return mfr_status; 417 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { 418 ret |= data->have_oc_fault ? 419 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; 420 } 421 break; 422 case PMBUS_STATUS_VOUT: 423 if (data->have_vout) 424 return -ENODATA; 425 ret = 0; 426 if (data->have_vaux_status) { 427 mfr_status = pmbus_read_byte_data(client, 0, 428 ADM1075_VAUX_STATUS); 429 if (mfr_status < 0) 430 return mfr_status; 431 if (mfr_status & ADM1075_VAUX_OV_WARN) 432 ret |= PB_VOLTAGE_OV_WARNING; 433 if (mfr_status & ADM1075_VAUX_UV_WARN) 434 ret |= PB_VOLTAGE_UV_WARNING; 435 } else if (data->have_mfr_vaux_status) { 436 mfr_status = pmbus_read_byte_data(client, page, 437 PMBUS_STATUS_MFR_SPECIFIC); 438 if (mfr_status < 0) 439 return mfr_status; 440 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN) 441 ret |= PB_VOLTAGE_OV_WARNING; 442 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN) 443 ret |= PB_VOLTAGE_UV_WARNING; 444 } 445 break; 446 default: 447 ret = -ENODATA; 448 break; 449 } 450 return ret; 451 } 452 453 static const struct i2c_device_id adm1275_id[] = { 454 { "adm1075", adm1075 }, 455 { "adm1272", adm1272 }, 456 { "adm1275", adm1275 }, 457 { "adm1276", adm1276 }, 458 { "adm1278", adm1278 }, 459 { "adm1293", adm1293 }, 460 { "adm1294", adm1294 }, 461 { } 462 }; 463 MODULE_DEVICE_TABLE(i2c, adm1275_id); 464 465 static int adm1275_probe(struct i2c_client *client) 466 { 467 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg); 468 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; 469 int config, device_config; 470 int ret; 471 struct pmbus_driver_info *info; 472 struct adm1275_data *data; 473 const struct i2c_device_id *mid; 474 const struct coefficients *coefficients; 475 int vindex = -1, voindex = -1, cindex = -1, pindex = -1; 476 int tindex = -1; 477 u32 shunt; 478 u32 avg; 479 480 if (!i2c_check_functionality(client->adapter, 481 I2C_FUNC_SMBUS_READ_BYTE_DATA 482 | I2C_FUNC_SMBUS_BLOCK_DATA)) 483 return -ENODEV; 484 485 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); 486 if (ret < 0) { 487 dev_err(&client->dev, "Failed to read Manufacturer ID\n"); 488 return ret; 489 } 490 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { 491 dev_err(&client->dev, "Unsupported Manufacturer ID\n"); 492 return -ENODEV; 493 } 494 495 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); 496 if (ret < 0) { 497 dev_err(&client->dev, "Failed to read Manufacturer Model\n"); 498 return ret; 499 } 500 for (mid = adm1275_id; mid->name[0]; mid++) { 501 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) 502 break; 503 } 504 if (!mid->name[0]) { 505 dev_err(&client->dev, "Unsupported device\n"); 506 return -ENODEV; 507 } 508 509 if (strcmp(client->name, mid->name) != 0) 510 dev_notice(&client->dev, 511 "Device mismatch: Configured %s, detected %s\n", 512 client->name, mid->name); 513 514 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 || 515 mid->driver_data == adm1293 || mid->driver_data == adm1294) 516 config_read_fn = i2c_smbus_read_word_data; 517 else 518 config_read_fn = i2c_smbus_read_byte_data; 519 config = config_read_fn(client, ADM1275_PMON_CONFIG); 520 if (config < 0) 521 return config; 522 523 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG); 524 if (device_config < 0) 525 return device_config; 526 527 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), 528 GFP_KERNEL); 529 if (!data) 530 return -ENOMEM; 531 532 if (of_property_read_u32(client->dev.of_node, 533 "shunt-resistor-micro-ohms", &shunt)) 534 shunt = 1000; /* 1 mOhm if not set via DT */ 535 536 if (shunt == 0) 537 return -EINVAL; 538 539 data->id = mid->driver_data; 540 541 info = &data->info; 542 543 info->pages = 1; 544 info->format[PSC_VOLTAGE_IN] = direct; 545 info->format[PSC_VOLTAGE_OUT] = direct; 546 info->format[PSC_CURRENT_OUT] = direct; 547 info->format[PSC_POWER] = direct; 548 info->format[PSC_TEMPERATURE] = direct; 549 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | 550 PMBUS_HAVE_SAMPLES; 551 552 info->read_word_data = adm1275_read_word_data; 553 info->read_byte_data = adm1275_read_byte_data; 554 info->write_word_data = adm1275_write_word_data; 555 556 switch (data->id) { 557 case adm1075: 558 if (device_config & ADM1275_IOUT_WARN2_SELECT) 559 data->have_oc_fault = true; 560 else 561 data->have_uc_fault = true; 562 data->have_pin_max = true; 563 data->have_vaux_status = true; 564 565 coefficients = adm1075_coefficients; 566 vindex = 0; 567 switch (config & ADM1075_IRANGE_MASK) { 568 case ADM1075_IRANGE_25: 569 cindex = 1; 570 pindex = 3; 571 break; 572 case ADM1075_IRANGE_50: 573 cindex = 2; 574 pindex = 4; 575 break; 576 default: 577 dev_err(&client->dev, "Invalid input current range"); 578 break; 579 } 580 581 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 582 | PMBUS_HAVE_STATUS_INPUT; 583 if (config & ADM1275_VIN_VOUT_SELECT) 584 info->func[0] |= 585 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 586 break; 587 case adm1272: 588 data->have_vout = true; 589 data->have_pin_max = true; 590 data->have_temp_max = true; 591 data->have_power_sampling = true; 592 593 coefficients = adm1272_coefficients; 594 vindex = (config & ADM1275_VRANGE) ? 1 : 0; 595 cindex = (config & ADM1272_IRANGE) ? 3 : 2; 596 /* pindex depends on the combination of the above */ 597 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) { 598 case 0: 599 default: 600 pindex = 4; 601 break; 602 case ADM1275_VRANGE: 603 pindex = 5; 604 break; 605 case ADM1272_IRANGE: 606 pindex = 6; 607 break; 608 case ADM1275_VRANGE | ADM1272_IRANGE: 609 pindex = 7; 610 break; 611 } 612 tindex = 8; 613 614 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 615 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 616 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 617 618 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */ 619 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) != 620 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) { 621 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN; 622 ret = i2c_smbus_write_byte_data(client, 623 ADM1275_PMON_CONFIG, 624 config); 625 if (ret < 0) { 626 dev_err(&client->dev, 627 "Failed to enable VOUT monitoring\n"); 628 return -ENODEV; 629 } 630 } 631 if (config & ADM1278_VIN_EN) 632 info->func[0] |= PMBUS_HAVE_VIN; 633 break; 634 case adm1275: 635 if (device_config & ADM1275_IOUT_WARN2_SELECT) 636 data->have_oc_fault = true; 637 else 638 data->have_uc_fault = true; 639 data->have_vout = true; 640 641 coefficients = adm1275_coefficients; 642 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 643 cindex = 2; 644 645 if (config & ADM1275_VIN_VOUT_SELECT) 646 info->func[0] |= 647 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 648 else 649 info->func[0] |= 650 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 651 break; 652 case adm1276: 653 if (device_config & ADM1275_IOUT_WARN2_SELECT) 654 data->have_oc_fault = true; 655 else 656 data->have_uc_fault = true; 657 data->have_vout = true; 658 data->have_pin_max = true; 659 660 coefficients = adm1276_coefficients; 661 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 662 cindex = 2; 663 pindex = (config & ADM1275_VRANGE) ? 3 : 4; 664 665 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 666 | PMBUS_HAVE_STATUS_INPUT; 667 if (config & ADM1275_VIN_VOUT_SELECT) 668 info->func[0] |= 669 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 670 break; 671 case adm1278: 672 data->have_vout = true; 673 data->have_pin_max = true; 674 data->have_temp_max = true; 675 data->have_power_sampling = true; 676 677 coefficients = adm1278_coefficients; 678 vindex = 0; 679 cindex = 1; 680 pindex = 2; 681 tindex = 3; 682 683 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 684 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 685 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 686 687 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */ 688 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) != 689 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) { 690 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN; 691 ret = i2c_smbus_write_word_data(client, 692 ADM1275_PMON_CONFIG, 693 config); 694 if (ret < 0) { 695 dev_err(&client->dev, 696 "Failed to enable VOUT monitoring\n"); 697 return -ENODEV; 698 } 699 } 700 701 if (config & ADM1278_VIN_EN) 702 info->func[0] |= PMBUS_HAVE_VIN; 703 break; 704 case adm1293: 705 case adm1294: 706 data->have_iout_min = true; 707 data->have_pin_min = true; 708 data->have_pin_max = true; 709 data->have_mfr_vaux_status = true; 710 data->have_power_sampling = true; 711 712 coefficients = adm1293_coefficients; 713 714 voindex = 0; 715 switch (config & ADM1293_VIN_SEL_MASK) { 716 case ADM1293_VIN_SEL_012: /* 1.2V */ 717 vindex = 0; 718 break; 719 case ADM1293_VIN_SEL_074: /* 7.4V */ 720 vindex = 1; 721 break; 722 case ADM1293_VIN_SEL_210: /* 21V */ 723 vindex = 2; 724 break; 725 default: /* disabled */ 726 break; 727 } 728 729 switch (config & ADM1293_IRANGE_MASK) { 730 case ADM1293_IRANGE_25: 731 cindex = 3; 732 break; 733 case ADM1293_IRANGE_50: 734 cindex = 4; 735 break; 736 case ADM1293_IRANGE_100: 737 cindex = 5; 738 break; 739 case ADM1293_IRANGE_200: 740 cindex = 6; 741 break; 742 } 743 744 if (vindex >= 0) 745 pindex = 7 + vindex * 4 + (cindex - 3); 746 747 if (config & ADM1293_VAUX_EN) 748 info->func[0] |= 749 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 750 751 info->func[0] |= PMBUS_HAVE_PIN | 752 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 753 754 break; 755 default: 756 dev_err(&client->dev, "Unsupported device\n"); 757 return -ENODEV; 758 } 759 760 if (data->have_power_sampling && 761 of_property_read_u32(client->dev.of_node, 762 "adi,power-sample-average", &avg) == 0) { 763 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX || 764 BIT(__fls(avg)) != avg) { 765 dev_err(&client->dev, 766 "Invalid number of power samples"); 767 return -EINVAL; 768 } 769 ret = adm1275_write_pmon_config(data, client, true, 770 ilog2(avg)); 771 if (ret < 0) { 772 dev_err(&client->dev, 773 "Setting power sample averaging failed with error %d", 774 ret); 775 return ret; 776 } 777 } 778 779 if (of_property_read_u32(client->dev.of_node, 780 "adi,volt-curr-sample-average", &avg) == 0) { 781 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX || 782 BIT(__fls(avg)) != avg) { 783 dev_err(&client->dev, 784 "Invalid number of voltage/current samples"); 785 return -EINVAL; 786 } 787 ret = adm1275_write_pmon_config(data, client, false, 788 ilog2(avg)); 789 if (ret < 0) { 790 dev_err(&client->dev, 791 "Setting voltage and current sample averaging failed with error %d", 792 ret); 793 return ret; 794 } 795 } 796 797 if (voindex < 0) 798 voindex = vindex; 799 if (vindex >= 0) { 800 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m; 801 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b; 802 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R; 803 } 804 if (voindex >= 0) { 805 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m; 806 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b; 807 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R; 808 } 809 if (cindex >= 0) { 810 /* Scale current with sense resistor value */ 811 info->m[PSC_CURRENT_OUT] = 812 coefficients[cindex].m * shunt / 1000; 813 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b; 814 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R; 815 } 816 if (pindex >= 0) { 817 info->m[PSC_POWER] = 818 coefficients[pindex].m * shunt / 1000; 819 info->b[PSC_POWER] = coefficients[pindex].b; 820 info->R[PSC_POWER] = coefficients[pindex].R; 821 } 822 if (tindex >= 0) { 823 info->m[PSC_TEMPERATURE] = coefficients[tindex].m; 824 info->b[PSC_TEMPERATURE] = coefficients[tindex].b; 825 info->R[PSC_TEMPERATURE] = coefficients[tindex].R; 826 } 827 828 return pmbus_do_probe(client, info); 829 } 830 831 static struct i2c_driver adm1275_driver = { 832 .driver = { 833 .name = "adm1275", 834 }, 835 .probe_new = adm1275_probe, 836 .id_table = adm1275_id, 837 }; 838 839 module_i2c_driver(adm1275_driver); 840 841 MODULE_AUTHOR("Guenter Roeck"); 842 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); 843 MODULE_LICENSE("GPL"); 844 MODULE_IMPORT_NS(PMBUS); 845