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, adm1281, 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_CONTROL 0xd3 31 #define ADM1275_PMON_CONFIG 0xd4 32 33 #define ADM1275_CONVERT_EN BIT(0) 34 35 #define ADM1275_VIN_VOUT_SELECT BIT(6) 36 #define ADM1275_VRANGE BIT(5) 37 #define ADM1075_IRANGE_50 BIT(4) 38 #define ADM1075_IRANGE_25 BIT(3) 39 #define ADM1075_IRANGE_MASK (BIT(3) | BIT(4)) 40 41 #define ADM1272_IRANGE BIT(0) 42 43 #define ADM1278_TSFILT BIT(15) 44 #define ADM1278_TEMP1_EN BIT(3) 45 #define ADM1278_VIN_EN BIT(2) 46 #define ADM1278_VOUT_EN BIT(1) 47 48 #define ADM1278_PMON_DEFCONFIG (ADM1278_VOUT_EN | ADM1278_TEMP1_EN | ADM1278_TSFILT) 49 50 #define ADM1293_IRANGE_25 0 51 #define ADM1293_IRANGE_50 BIT(6) 52 #define ADM1293_IRANGE_100 BIT(7) 53 #define ADM1293_IRANGE_200 (BIT(6) | BIT(7)) 54 #define ADM1293_IRANGE_MASK (BIT(6) | BIT(7)) 55 56 #define ADM1293_VIN_SEL_012 BIT(2) 57 #define ADM1293_VIN_SEL_074 BIT(3) 58 #define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3)) 59 #define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3)) 60 61 #define ADM1293_VAUX_EN BIT(1) 62 63 #define ADM1278_PEAK_TEMP 0xd7 64 #define ADM1275_IOUT_WARN2_LIMIT 0xd7 65 #define ADM1275_DEVICE_CONFIG 0xd8 66 67 #define ADM1275_IOUT_WARN2_SELECT BIT(4) 68 69 #define ADM1276_PEAK_PIN 0xda 70 #define ADM1075_READ_VAUX 0xdd 71 #define ADM1075_VAUX_OV_WARN_LIMIT 0xde 72 #define ADM1075_VAUX_UV_WARN_LIMIT 0xdf 73 #define ADM1293_IOUT_MIN 0xe3 74 #define ADM1293_PIN_MIN 0xe4 75 #define ADM1075_VAUX_STATUS 0xf6 76 77 #define ADM1075_VAUX_OV_WARN BIT(7) 78 #define ADM1075_VAUX_UV_WARN BIT(6) 79 80 #define ADM1275_VI_AVG_SHIFT 0 81 #define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \ 82 ADM1275_VI_AVG_SHIFT) 83 #define ADM1275_SAMPLES_AVG_MAX 128 84 85 #define ADM1278_PWR_AVG_SHIFT 11 86 #define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \ 87 ADM1278_PWR_AVG_SHIFT) 88 #define ADM1278_VI_AVG_SHIFT 8 89 #define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \ 90 ADM1278_VI_AVG_SHIFT) 91 92 struct adm1275_data { 93 int id; 94 bool have_oc_fault; 95 bool have_uc_fault; 96 bool have_vout; 97 bool have_vaux_status; 98 bool have_mfr_vaux_status; 99 bool have_iout_min; 100 bool have_pin_min; 101 bool have_pin_max; 102 bool have_temp_max; 103 bool have_power_sampling; 104 struct pmbus_driver_info info; 105 }; 106 107 #define to_adm1275_data(x) container_of(x, struct adm1275_data, info) 108 109 struct coefficients { 110 s16 m; 111 s16 b; 112 s16 R; 113 }; 114 115 static const struct coefficients adm1075_coefficients[] = { 116 [0] = { 27169, 0, -1 }, /* voltage */ 117 [1] = { 806, 20475, -1 }, /* current, irange25 */ 118 [2] = { 404, 20475, -1 }, /* current, irange50 */ 119 [3] = { 8549, 0, -1 }, /* power, irange25 */ 120 [4] = { 4279, 0, -1 }, /* power, irange50 */ 121 }; 122 123 static const struct coefficients adm1272_coefficients[] = { 124 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */ 125 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */ 126 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */ 127 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */ 128 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */ 129 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */ 130 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */ 131 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */ 132 [8] = { 42, 31871, -1 }, /* temperature */ 133 134 }; 135 136 static const struct coefficients adm1275_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 }; 141 142 static const struct coefficients adm1276_coefficients[] = { 143 [0] = { 19199, 0, -2 }, /* voltage, vrange set */ 144 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */ 145 [2] = { 807, 20475, -1 }, /* current */ 146 [3] = { 6043, 0, -2 }, /* power, vrange set */ 147 [4] = { 2115, 0, -1 }, /* power, vrange not set */ 148 }; 149 150 static const struct coefficients adm1278_coefficients[] = { 151 [0] = { 19599, 0, -2 }, /* voltage */ 152 [1] = { 800, 20475, -1 }, /* current */ 153 [2] = { 6123, 0, -2 }, /* power */ 154 [3] = { 42, 31880, -1 }, /* temperature */ 155 }; 156 157 static const struct coefficients adm1293_coefficients[] = { 158 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */ 159 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */ 160 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */ 161 [3] = { 8000, -100, -2 }, /* current, irange25 */ 162 [4] = { 4000, -100, -2 }, /* current, irange50 */ 163 [5] = { 20000, -1000, -3 }, /* current, irange100 */ 164 [6] = { 10000, -1000, -3 }, /* current, irange200 */ 165 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */ 166 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */ 167 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */ 168 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */ 169 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */ 170 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */ 171 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */ 172 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */ 173 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */ 174 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */ 175 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */ 176 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */ 177 }; 178 179 static int adm1275_read_samples(const struct adm1275_data *data, 180 struct i2c_client *client, bool is_power) 181 { 182 int shift, ret; 183 u16 mask; 184 185 /* 186 * The PMON configuration register is a 16-bit register only on chips 187 * supporting power average sampling. On other chips it is an 8-bit 188 * register. 189 */ 190 if (data->have_power_sampling) { 191 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); 192 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; 193 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; 194 } else { 195 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 196 mask = ADM1275_VI_AVG_MASK; 197 shift = ADM1275_VI_AVG_SHIFT; 198 } 199 if (ret < 0) 200 return ret; 201 202 return (ret & mask) >> shift; 203 } 204 205 static int adm1275_write_pmon_config(const struct adm1275_data *data, 206 struct i2c_client *client, u16 word) 207 { 208 int ret, ret2; 209 210 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONTROL, 0); 211 if (ret) 212 return ret; 213 214 if (data->have_power_sampling) 215 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, 216 word); 217 else 218 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG, 219 word); 220 221 /* 222 * We still want to re-enable conversions if writing into 223 * ADM1275_PMON_CONFIG failed. 224 */ 225 ret2 = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONTROL, 226 ADM1275_CONVERT_EN); 227 if (!ret) 228 ret = ret2; 229 230 return ret; 231 } 232 233 static int adm1275_write_samples(const struct adm1275_data *data, 234 struct i2c_client *client, 235 bool is_power, u16 word) 236 { 237 int shift, ret; 238 u16 mask; 239 240 if (data->have_power_sampling) { 241 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); 242 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; 243 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; 244 } else { 245 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 246 mask = ADM1275_VI_AVG_MASK; 247 shift = ADM1275_VI_AVG_SHIFT; 248 } 249 if (ret < 0) 250 return ret; 251 252 word = (ret & ~mask) | ((word << shift) & mask); 253 254 return adm1275_write_pmon_config(data, client, word); 255 } 256 257 static int adm1275_read_word_data(struct i2c_client *client, int page, 258 int phase, int reg) 259 { 260 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 261 const struct adm1275_data *data = to_adm1275_data(info); 262 int ret = 0; 263 264 if (page > 0) 265 return -ENXIO; 266 267 switch (reg) { 268 case PMBUS_IOUT_UC_FAULT_LIMIT: 269 if (!data->have_uc_fault) 270 return -ENXIO; 271 ret = pmbus_read_word_data(client, 0, 0xff, 272 ADM1275_IOUT_WARN2_LIMIT); 273 break; 274 case PMBUS_IOUT_OC_FAULT_LIMIT: 275 if (!data->have_oc_fault) 276 return -ENXIO; 277 ret = pmbus_read_word_data(client, 0, 0xff, 278 ADM1275_IOUT_WARN2_LIMIT); 279 break; 280 case PMBUS_VOUT_OV_WARN_LIMIT: 281 if (data->have_vout) 282 return -ENODATA; 283 ret = pmbus_read_word_data(client, 0, 0xff, 284 ADM1075_VAUX_OV_WARN_LIMIT); 285 break; 286 case PMBUS_VOUT_UV_WARN_LIMIT: 287 if (data->have_vout) 288 return -ENODATA; 289 ret = pmbus_read_word_data(client, 0, 0xff, 290 ADM1075_VAUX_UV_WARN_LIMIT); 291 break; 292 case PMBUS_READ_VOUT: 293 if (data->have_vout) 294 return -ENODATA; 295 ret = pmbus_read_word_data(client, 0, 0xff, 296 ADM1075_READ_VAUX); 297 break; 298 case PMBUS_VIRT_READ_IOUT_MIN: 299 if (!data->have_iout_min) 300 return -ENXIO; 301 ret = pmbus_read_word_data(client, 0, 0xff, 302 ADM1293_IOUT_MIN); 303 break; 304 case PMBUS_VIRT_READ_IOUT_MAX: 305 ret = pmbus_read_word_data(client, 0, 0xff, 306 ADM1275_PEAK_IOUT); 307 break; 308 case PMBUS_VIRT_READ_VOUT_MAX: 309 ret = pmbus_read_word_data(client, 0, 0xff, 310 ADM1275_PEAK_VOUT); 311 break; 312 case PMBUS_VIRT_READ_VIN_MAX: 313 ret = pmbus_read_word_data(client, 0, 0xff, 314 ADM1275_PEAK_VIN); 315 break; 316 case PMBUS_VIRT_READ_PIN_MIN: 317 if (!data->have_pin_min) 318 return -ENXIO; 319 ret = pmbus_read_word_data(client, 0, 0xff, 320 ADM1293_PIN_MIN); 321 break; 322 case PMBUS_VIRT_READ_PIN_MAX: 323 if (!data->have_pin_max) 324 return -ENXIO; 325 ret = pmbus_read_word_data(client, 0, 0xff, 326 ADM1276_PEAK_PIN); 327 break; 328 case PMBUS_VIRT_READ_TEMP_MAX: 329 if (!data->have_temp_max) 330 return -ENXIO; 331 ret = pmbus_read_word_data(client, 0, 0xff, 332 ADM1278_PEAK_TEMP); 333 break; 334 case PMBUS_VIRT_RESET_IOUT_HISTORY: 335 case PMBUS_VIRT_RESET_VOUT_HISTORY: 336 case PMBUS_VIRT_RESET_VIN_HISTORY: 337 break; 338 case PMBUS_VIRT_RESET_PIN_HISTORY: 339 if (!data->have_pin_max) 340 return -ENXIO; 341 break; 342 case PMBUS_VIRT_RESET_TEMP_HISTORY: 343 if (!data->have_temp_max) 344 return -ENXIO; 345 break; 346 case PMBUS_VIRT_POWER_SAMPLES: 347 if (!data->have_power_sampling) 348 return -ENXIO; 349 ret = adm1275_read_samples(data, client, true); 350 if (ret < 0) 351 break; 352 ret = BIT(ret); 353 break; 354 case PMBUS_VIRT_IN_SAMPLES: 355 case PMBUS_VIRT_CURR_SAMPLES: 356 ret = adm1275_read_samples(data, client, false); 357 if (ret < 0) 358 break; 359 ret = BIT(ret); 360 break; 361 default: 362 ret = -ENODATA; 363 break; 364 } 365 return ret; 366 } 367 368 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, 369 u16 word) 370 { 371 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 372 const struct adm1275_data *data = to_adm1275_data(info); 373 int ret; 374 375 if (page > 0) 376 return -ENXIO; 377 378 switch (reg) { 379 case PMBUS_IOUT_UC_FAULT_LIMIT: 380 case PMBUS_IOUT_OC_FAULT_LIMIT: 381 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, 382 word); 383 break; 384 case PMBUS_VIRT_RESET_IOUT_HISTORY: 385 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); 386 if (!ret && data->have_iout_min) 387 ret = pmbus_write_word_data(client, 0, 388 ADM1293_IOUT_MIN, 0); 389 break; 390 case PMBUS_VIRT_RESET_VOUT_HISTORY: 391 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0); 392 break; 393 case PMBUS_VIRT_RESET_VIN_HISTORY: 394 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); 395 break; 396 case PMBUS_VIRT_RESET_PIN_HISTORY: 397 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); 398 if (!ret && data->have_pin_min) 399 ret = pmbus_write_word_data(client, 0, 400 ADM1293_PIN_MIN, 0); 401 break; 402 case PMBUS_VIRT_RESET_TEMP_HISTORY: 403 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); 404 break; 405 case PMBUS_VIRT_POWER_SAMPLES: 406 if (!data->have_power_sampling) 407 return -ENXIO; 408 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 409 ret = adm1275_write_samples(data, client, true, ilog2(word)); 410 break; 411 case PMBUS_VIRT_IN_SAMPLES: 412 case PMBUS_VIRT_CURR_SAMPLES: 413 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 414 ret = adm1275_write_samples(data, client, false, ilog2(word)); 415 break; 416 default: 417 ret = -ENODATA; 418 break; 419 } 420 return ret; 421 } 422 423 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) 424 { 425 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 426 const struct adm1275_data *data = to_adm1275_data(info); 427 int mfr_status, ret; 428 429 if (page > 0) 430 return -ENXIO; 431 432 switch (reg) { 433 case PMBUS_STATUS_IOUT: 434 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); 435 if (ret < 0) 436 break; 437 if (!data->have_oc_fault && !data->have_uc_fault) 438 break; 439 mfr_status = pmbus_read_byte_data(client, page, 440 PMBUS_STATUS_MFR_SPECIFIC); 441 if (mfr_status < 0) 442 return mfr_status; 443 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { 444 ret |= data->have_oc_fault ? 445 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; 446 } 447 break; 448 case PMBUS_STATUS_VOUT: 449 if (data->have_vout) 450 return -ENODATA; 451 ret = 0; 452 if (data->have_vaux_status) { 453 mfr_status = pmbus_read_byte_data(client, 0, 454 ADM1075_VAUX_STATUS); 455 if (mfr_status < 0) 456 return mfr_status; 457 if (mfr_status & ADM1075_VAUX_OV_WARN) 458 ret |= PB_VOLTAGE_OV_WARNING; 459 if (mfr_status & ADM1075_VAUX_UV_WARN) 460 ret |= PB_VOLTAGE_UV_WARNING; 461 } else if (data->have_mfr_vaux_status) { 462 mfr_status = pmbus_read_byte_data(client, page, 463 PMBUS_STATUS_MFR_SPECIFIC); 464 if (mfr_status < 0) 465 return mfr_status; 466 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN) 467 ret |= PB_VOLTAGE_OV_WARNING; 468 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN) 469 ret |= PB_VOLTAGE_UV_WARNING; 470 } 471 break; 472 default: 473 ret = -ENODATA; 474 break; 475 } 476 return ret; 477 } 478 479 static const struct i2c_device_id adm1275_id[] = { 480 { "adm1075", adm1075 }, 481 { "adm1272", adm1272 }, 482 { "adm1275", adm1275 }, 483 { "adm1276", adm1276 }, 484 { "adm1278", adm1278 }, 485 { "adm1281", adm1281 }, 486 { "adm1293", adm1293 }, 487 { "adm1294", adm1294 }, 488 { } 489 }; 490 MODULE_DEVICE_TABLE(i2c, adm1275_id); 491 492 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */ 493 static int adm1275_enable_vout_temp(struct adm1275_data *data, 494 struct i2c_client *client, int config) 495 { 496 int ret; 497 498 if ((config & ADM1278_PMON_DEFCONFIG) != ADM1278_PMON_DEFCONFIG) { 499 config |= ADM1278_PMON_DEFCONFIG; 500 ret = adm1275_write_pmon_config(data, client, config); 501 if (ret < 0) { 502 dev_err(&client->dev, "Failed to enable VOUT/TEMP1 monitoring\n"); 503 return ret; 504 } 505 } 506 return 0; 507 } 508 509 static int adm1275_probe(struct i2c_client *client) 510 { 511 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg); 512 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; 513 int config, device_config; 514 int ret; 515 struct pmbus_driver_info *info; 516 struct adm1275_data *data; 517 const struct i2c_device_id *mid; 518 const struct coefficients *coefficients; 519 int vindex = -1, voindex = -1, cindex = -1, pindex = -1; 520 int tindex = -1; 521 u32 shunt; 522 u32 avg; 523 524 if (!i2c_check_functionality(client->adapter, 525 I2C_FUNC_SMBUS_READ_BYTE_DATA 526 | I2C_FUNC_SMBUS_BLOCK_DATA)) 527 return -ENODEV; 528 529 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); 530 if (ret < 0) { 531 dev_err(&client->dev, "Failed to read Manufacturer ID\n"); 532 return ret; 533 } 534 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { 535 dev_err(&client->dev, "Unsupported Manufacturer ID\n"); 536 return -ENODEV; 537 } 538 539 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); 540 if (ret < 0) { 541 dev_err(&client->dev, "Failed to read Manufacturer Model\n"); 542 return ret; 543 } 544 for (mid = adm1275_id; mid->name[0]; mid++) { 545 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) 546 break; 547 } 548 if (!mid->name[0]) { 549 dev_err(&client->dev, "Unsupported device\n"); 550 return -ENODEV; 551 } 552 553 if (strcmp(client->name, mid->name) != 0) 554 dev_notice(&client->dev, 555 "Device mismatch: Configured %s, detected %s\n", 556 client->name, mid->name); 557 558 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 || 559 mid->driver_data == adm1281 || mid->driver_data == adm1293 || 560 mid->driver_data == adm1294) 561 config_read_fn = i2c_smbus_read_word_data; 562 else 563 config_read_fn = i2c_smbus_read_byte_data; 564 config = config_read_fn(client, ADM1275_PMON_CONFIG); 565 if (config < 0) 566 return config; 567 568 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG); 569 if (device_config < 0) 570 return device_config; 571 572 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), 573 GFP_KERNEL); 574 if (!data) 575 return -ENOMEM; 576 577 if (of_property_read_u32(client->dev.of_node, 578 "shunt-resistor-micro-ohms", &shunt)) 579 shunt = 1000; /* 1 mOhm if not set via DT */ 580 581 if (shunt == 0) 582 return -EINVAL; 583 584 data->id = mid->driver_data; 585 586 info = &data->info; 587 588 info->pages = 1; 589 info->format[PSC_VOLTAGE_IN] = direct; 590 info->format[PSC_VOLTAGE_OUT] = direct; 591 info->format[PSC_CURRENT_OUT] = direct; 592 info->format[PSC_POWER] = direct; 593 info->format[PSC_TEMPERATURE] = direct; 594 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | 595 PMBUS_HAVE_SAMPLES; 596 597 info->read_word_data = adm1275_read_word_data; 598 info->read_byte_data = adm1275_read_byte_data; 599 info->write_word_data = adm1275_write_word_data; 600 601 switch (data->id) { 602 case adm1075: 603 if (device_config & ADM1275_IOUT_WARN2_SELECT) 604 data->have_oc_fault = true; 605 else 606 data->have_uc_fault = true; 607 data->have_pin_max = true; 608 data->have_vaux_status = true; 609 610 coefficients = adm1075_coefficients; 611 vindex = 0; 612 switch (config & ADM1075_IRANGE_MASK) { 613 case ADM1075_IRANGE_25: 614 cindex = 1; 615 pindex = 3; 616 break; 617 case ADM1075_IRANGE_50: 618 cindex = 2; 619 pindex = 4; 620 break; 621 default: 622 dev_err(&client->dev, "Invalid input current range"); 623 break; 624 } 625 626 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 627 | PMBUS_HAVE_STATUS_INPUT; 628 if (config & ADM1275_VIN_VOUT_SELECT) 629 info->func[0] |= 630 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 631 break; 632 case adm1272: 633 data->have_vout = true; 634 data->have_pin_max = true; 635 data->have_temp_max = true; 636 data->have_power_sampling = true; 637 638 coefficients = adm1272_coefficients; 639 vindex = (config & ADM1275_VRANGE) ? 1 : 0; 640 cindex = (config & ADM1272_IRANGE) ? 3 : 2; 641 /* pindex depends on the combination of the above */ 642 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) { 643 case 0: 644 default: 645 pindex = 4; 646 break; 647 case ADM1275_VRANGE: 648 pindex = 5; 649 break; 650 case ADM1272_IRANGE: 651 pindex = 6; 652 break; 653 case ADM1275_VRANGE | ADM1272_IRANGE: 654 pindex = 7; 655 break; 656 } 657 tindex = 8; 658 659 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 660 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 661 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 662 663 ret = adm1275_enable_vout_temp(data, client, config); 664 if (ret) 665 return ret; 666 667 if (config & ADM1278_VIN_EN) 668 info->func[0] |= PMBUS_HAVE_VIN; 669 break; 670 case adm1275: 671 if (device_config & ADM1275_IOUT_WARN2_SELECT) 672 data->have_oc_fault = true; 673 else 674 data->have_uc_fault = true; 675 data->have_vout = true; 676 677 coefficients = adm1275_coefficients; 678 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 679 cindex = 2; 680 681 if (config & ADM1275_VIN_VOUT_SELECT) 682 info->func[0] |= 683 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 684 else 685 info->func[0] |= 686 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 687 break; 688 case adm1276: 689 if (device_config & ADM1275_IOUT_WARN2_SELECT) 690 data->have_oc_fault = true; 691 else 692 data->have_uc_fault = true; 693 data->have_vout = true; 694 data->have_pin_max = true; 695 696 coefficients = adm1276_coefficients; 697 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 698 cindex = 2; 699 pindex = (config & ADM1275_VRANGE) ? 3 : 4; 700 701 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 702 | PMBUS_HAVE_STATUS_INPUT; 703 if (config & ADM1275_VIN_VOUT_SELECT) 704 info->func[0] |= 705 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 706 break; 707 case adm1278: 708 case adm1281: 709 data->have_vout = true; 710 data->have_pin_max = true; 711 data->have_temp_max = true; 712 data->have_power_sampling = true; 713 714 coefficients = adm1278_coefficients; 715 vindex = 0; 716 cindex = 1; 717 pindex = 2; 718 tindex = 3; 719 720 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 721 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 722 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 723 724 ret = adm1275_enable_vout_temp(data, client, config); 725 if (ret) 726 return ret; 727 728 if (config & ADM1278_VIN_EN) 729 info->func[0] |= PMBUS_HAVE_VIN; 730 break; 731 case adm1293: 732 case adm1294: 733 data->have_iout_min = true; 734 data->have_pin_min = true; 735 data->have_pin_max = true; 736 data->have_mfr_vaux_status = true; 737 data->have_power_sampling = true; 738 739 coefficients = adm1293_coefficients; 740 741 voindex = 0; 742 switch (config & ADM1293_VIN_SEL_MASK) { 743 case ADM1293_VIN_SEL_012: /* 1.2V */ 744 vindex = 0; 745 break; 746 case ADM1293_VIN_SEL_074: /* 7.4V */ 747 vindex = 1; 748 break; 749 case ADM1293_VIN_SEL_210: /* 21V */ 750 vindex = 2; 751 break; 752 default: /* disabled */ 753 break; 754 } 755 756 switch (config & ADM1293_IRANGE_MASK) { 757 case ADM1293_IRANGE_25: 758 cindex = 3; 759 break; 760 case ADM1293_IRANGE_50: 761 cindex = 4; 762 break; 763 case ADM1293_IRANGE_100: 764 cindex = 5; 765 break; 766 case ADM1293_IRANGE_200: 767 cindex = 6; 768 break; 769 } 770 771 if (vindex >= 0) 772 pindex = 7 + vindex * 4 + (cindex - 3); 773 774 if (config & ADM1293_VAUX_EN) 775 info->func[0] |= 776 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 777 778 info->func[0] |= PMBUS_HAVE_PIN | 779 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 780 781 break; 782 default: 783 dev_err(&client->dev, "Unsupported device\n"); 784 return -ENODEV; 785 } 786 787 if (data->have_power_sampling && 788 of_property_read_u32(client->dev.of_node, 789 "adi,power-sample-average", &avg) == 0) { 790 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX || 791 BIT(__fls(avg)) != avg) { 792 dev_err(&client->dev, 793 "Invalid number of power samples"); 794 return -EINVAL; 795 } 796 ret = adm1275_write_samples(data, client, true, ilog2(avg)); 797 if (ret < 0) { 798 dev_err(&client->dev, 799 "Setting power sample averaging failed with error %d", 800 ret); 801 return ret; 802 } 803 } 804 805 if (of_property_read_u32(client->dev.of_node, 806 "adi,volt-curr-sample-average", &avg) == 0) { 807 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX || 808 BIT(__fls(avg)) != avg) { 809 dev_err(&client->dev, 810 "Invalid number of voltage/current samples"); 811 return -EINVAL; 812 } 813 ret = adm1275_write_samples(data, client, false, ilog2(avg)); 814 if (ret < 0) { 815 dev_err(&client->dev, 816 "Setting voltage and current sample averaging failed with error %d", 817 ret); 818 return ret; 819 } 820 } 821 822 if (voindex < 0) 823 voindex = vindex; 824 if (vindex >= 0) { 825 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m; 826 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b; 827 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R; 828 } 829 if (voindex >= 0) { 830 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m; 831 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b; 832 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R; 833 } 834 if (cindex >= 0) { 835 /* Scale current with sense resistor value */ 836 info->m[PSC_CURRENT_OUT] = 837 coefficients[cindex].m * shunt / 1000; 838 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b; 839 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R; 840 } 841 if (pindex >= 0) { 842 info->m[PSC_POWER] = 843 coefficients[pindex].m * shunt / 1000; 844 info->b[PSC_POWER] = coefficients[pindex].b; 845 info->R[PSC_POWER] = coefficients[pindex].R; 846 } 847 if (tindex >= 0) { 848 info->m[PSC_TEMPERATURE] = coefficients[tindex].m; 849 info->b[PSC_TEMPERATURE] = coefficients[tindex].b; 850 info->R[PSC_TEMPERATURE] = coefficients[tindex].R; 851 } 852 853 return pmbus_do_probe(client, info); 854 } 855 856 static struct i2c_driver adm1275_driver = { 857 .driver = { 858 .name = "adm1275", 859 }, 860 .probe = adm1275_probe, 861 .id_table = adm1275_id, 862 }; 863 864 module_i2c_driver(adm1275_driver); 865 866 MODULE_AUTHOR("Guenter Roeck"); 867 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); 868 MODULE_LICENSE("GPL"); 869 MODULE_IMPORT_NS(PMBUS); 870