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 21enum 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_TSFILT BIT(15) 41#define ADM1278_TEMP1_EN BIT(3) 42#define ADM1278_VIN_EN BIT(2) 43#define ADM1278_VOUT_EN BIT(1) 44 45#define ADM1278_PMON_DEFCONFIG (ADM1278_VOUT_EN | ADM1278_TEMP1_EN | ADM1278_TSFILT) 46 47#define ADM1293_IRANGE_25 0 48#define ADM1293_IRANGE_50 BIT(6) 49#define ADM1293_IRANGE_100 BIT(7) 50#define ADM1293_IRANGE_200 (BIT(6) | BIT(7)) 51#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7)) 52 53#define ADM1293_VIN_SEL_012 BIT(2) 54#define ADM1293_VIN_SEL_074 BIT(3) 55#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3)) 56#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3)) 57 58#define ADM1293_VAUX_EN BIT(1) 59 60#define ADM1278_PEAK_TEMP 0xd7 61#define ADM1275_IOUT_WARN2_LIMIT 0xd7 62#define ADM1275_DEVICE_CONFIG 0xd8 63 64#define ADM1275_IOUT_WARN2_SELECT BIT(4) 65 66#define ADM1276_PEAK_PIN 0xda 67#define ADM1075_READ_VAUX 0xdd 68#define ADM1075_VAUX_OV_WARN_LIMIT 0xde 69#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf 70#define ADM1293_IOUT_MIN 0xe3 71#define ADM1293_PIN_MIN 0xe4 72#define ADM1075_VAUX_STATUS 0xf6 73 74#define ADM1075_VAUX_OV_WARN BIT(7) 75#define ADM1075_VAUX_UV_WARN BIT(6) 76 77#define ADM1275_VI_AVG_SHIFT 0 78#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \ 79 ADM1275_VI_AVG_SHIFT) 80#define ADM1275_SAMPLES_AVG_MAX 128 81 82#define ADM1278_PWR_AVG_SHIFT 11 83#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \ 84 ADM1278_PWR_AVG_SHIFT) 85#define ADM1278_VI_AVG_SHIFT 8 86#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \ 87 ADM1278_VI_AVG_SHIFT) 88 89struct adm1275_data { 90 int id; 91 bool have_oc_fault; 92 bool have_uc_fault; 93 bool have_vout; 94 bool have_vaux_status; 95 bool have_mfr_vaux_status; 96 bool have_iout_min; 97 bool have_pin_min; 98 bool have_pin_max; 99 bool have_temp_max; 100 bool have_power_sampling; 101 struct pmbus_driver_info info; 102}; 103 104#define to_adm1275_data(x) container_of(x, struct adm1275_data, info) 105 106struct coefficients { 107 s16 m; 108 s16 b; 109 s16 R; 110}; 111 112static const struct coefficients adm1075_coefficients[] = { 113 [0] = { 27169, 0, -1 }, /* voltage */ 114 [1] = { 806, 20475, -1 }, /* current, irange25 */ 115 [2] = { 404, 20475, -1 }, /* current, irange50 */ 116 [3] = { 8549, 0, -1 }, /* power, irange25 */ 117 [4] = { 4279, 0, -1 }, /* power, irange50 */ 118}; 119 120static const struct coefficients adm1272_coefficients[] = { 121 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */ 122 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */ 123 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */ 124 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */ 125 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */ 126 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */ 127 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */ 128 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */ 129 [8] = { 42, 31871, -1 }, /* temperature */ 130 131}; 132 133static const struct coefficients adm1275_coefficients[] = { 134 [0] = { 19199, 0, -2 }, /* voltage, vrange set */ 135 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */ 136 [2] = { 807, 20475, -1 }, /* current */ 137}; 138 139static const struct coefficients adm1276_coefficients[] = { 140 [0] = { 19199, 0, -2 }, /* voltage, vrange set */ 141 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */ 142 [2] = { 807, 20475, -1 }, /* current */ 143 [3] = { 6043, 0, -2 }, /* power, vrange set */ 144 [4] = { 2115, 0, -1 }, /* power, vrange not set */ 145}; 146 147static const struct coefficients adm1278_coefficients[] = { 148 [0] = { 19599, 0, -2 }, /* voltage */ 149 [1] = { 800, 20475, -1 }, /* current */ 150 [2] = { 6123, 0, -2 }, /* power */ 151 [3] = { 42, 31880, -1 }, /* temperature */ 152}; 153 154static const struct coefficients adm1293_coefficients[] = { 155 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */ 156 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */ 157 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */ 158 [3] = { 8000, -100, -2 }, /* current, irange25 */ 159 [4] = { 4000, -100, -2 }, /* current, irange50 */ 160 [5] = { 20000, -1000, -3 }, /* current, irange100 */ 161 [6] = { 10000, -1000, -3 }, /* current, irange200 */ 162 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */ 163 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */ 164 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */ 165 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */ 166 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */ 167 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */ 168 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */ 169 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */ 170 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */ 171 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */ 172 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */ 173 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */ 174}; 175 176static int adm1275_read_pmon_config(const struct adm1275_data *data, 177 struct i2c_client *client, bool is_power) 178{ 179 int shift, ret; 180 u16 mask; 181 182 /* 183 * The PMON configuration register is a 16-bit register only on chips 184 * supporting power average sampling. On other chips it is an 8-bit 185 * register. 186 */ 187 if (data->have_power_sampling) { 188 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); 189 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; 190 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; 191 } else { 192 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 193 mask = ADM1275_VI_AVG_MASK; 194 shift = ADM1275_VI_AVG_SHIFT; 195 } 196 if (ret < 0) 197 return ret; 198 199 return (ret & mask) >> shift; 200} 201 202static int adm1275_write_pmon_config(const struct adm1275_data *data, 203 struct i2c_client *client, 204 bool is_power, u16 word) 205{ 206 int shift, ret; 207 u16 mask; 208 209 if (data->have_power_sampling) { 210 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG); 211 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK; 212 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT; 213 } else { 214 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG); 215 mask = ADM1275_VI_AVG_MASK; 216 shift = ADM1275_VI_AVG_SHIFT; 217 } 218 if (ret < 0) 219 return ret; 220 221 word = (ret & ~mask) | ((word << shift) & mask); 222 if (data->have_power_sampling) 223 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, 224 word); 225 else 226 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG, 227 word); 228 229 return ret; 230} 231 232static int adm1275_read_word_data(struct i2c_client *client, int page, 233 int phase, int reg) 234{ 235 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 236 const struct adm1275_data *data = to_adm1275_data(info); 237 int ret = 0; 238 239 if (page > 0) 240 return -ENXIO; 241 242 switch (reg) { 243 case PMBUS_IOUT_UC_FAULT_LIMIT: 244 if (!data->have_uc_fault) 245 return -ENXIO; 246 ret = pmbus_read_word_data(client, 0, 0xff, 247 ADM1275_IOUT_WARN2_LIMIT); 248 break; 249 case PMBUS_IOUT_OC_FAULT_LIMIT: 250 if (!data->have_oc_fault) 251 return -ENXIO; 252 ret = pmbus_read_word_data(client, 0, 0xff, 253 ADM1275_IOUT_WARN2_LIMIT); 254 break; 255 case PMBUS_VOUT_OV_WARN_LIMIT: 256 if (data->have_vout) 257 return -ENODATA; 258 ret = pmbus_read_word_data(client, 0, 0xff, 259 ADM1075_VAUX_OV_WARN_LIMIT); 260 break; 261 case PMBUS_VOUT_UV_WARN_LIMIT: 262 if (data->have_vout) 263 return -ENODATA; 264 ret = pmbus_read_word_data(client, 0, 0xff, 265 ADM1075_VAUX_UV_WARN_LIMIT); 266 break; 267 case PMBUS_READ_VOUT: 268 if (data->have_vout) 269 return -ENODATA; 270 ret = pmbus_read_word_data(client, 0, 0xff, 271 ADM1075_READ_VAUX); 272 break; 273 case PMBUS_VIRT_READ_IOUT_MIN: 274 if (!data->have_iout_min) 275 return -ENXIO; 276 ret = pmbus_read_word_data(client, 0, 0xff, 277 ADM1293_IOUT_MIN); 278 break; 279 case PMBUS_VIRT_READ_IOUT_MAX: 280 ret = pmbus_read_word_data(client, 0, 0xff, 281 ADM1275_PEAK_IOUT); 282 break; 283 case PMBUS_VIRT_READ_VOUT_MAX: 284 ret = pmbus_read_word_data(client, 0, 0xff, 285 ADM1275_PEAK_VOUT); 286 break; 287 case PMBUS_VIRT_READ_VIN_MAX: 288 ret = pmbus_read_word_data(client, 0, 0xff, 289 ADM1275_PEAK_VIN); 290 break; 291 case PMBUS_VIRT_READ_PIN_MIN: 292 if (!data->have_pin_min) 293 return -ENXIO; 294 ret = pmbus_read_word_data(client, 0, 0xff, 295 ADM1293_PIN_MIN); 296 break; 297 case PMBUS_VIRT_READ_PIN_MAX: 298 if (!data->have_pin_max) 299 return -ENXIO; 300 ret = pmbus_read_word_data(client, 0, 0xff, 301 ADM1276_PEAK_PIN); 302 break; 303 case PMBUS_VIRT_READ_TEMP_MAX: 304 if (!data->have_temp_max) 305 return -ENXIO; 306 ret = pmbus_read_word_data(client, 0, 0xff, 307 ADM1278_PEAK_TEMP); 308 break; 309 case PMBUS_VIRT_RESET_IOUT_HISTORY: 310 case PMBUS_VIRT_RESET_VOUT_HISTORY: 311 case PMBUS_VIRT_RESET_VIN_HISTORY: 312 break; 313 case PMBUS_VIRT_RESET_PIN_HISTORY: 314 if (!data->have_pin_max) 315 return -ENXIO; 316 break; 317 case PMBUS_VIRT_RESET_TEMP_HISTORY: 318 if (!data->have_temp_max) 319 return -ENXIO; 320 break; 321 case PMBUS_VIRT_POWER_SAMPLES: 322 if (!data->have_power_sampling) 323 return -ENXIO; 324 ret = adm1275_read_pmon_config(data, client, true); 325 if (ret < 0) 326 break; 327 ret = BIT(ret); 328 break; 329 case PMBUS_VIRT_IN_SAMPLES: 330 case PMBUS_VIRT_CURR_SAMPLES: 331 ret = adm1275_read_pmon_config(data, client, false); 332 if (ret < 0) 333 break; 334 ret = BIT(ret); 335 break; 336 default: 337 ret = -ENODATA; 338 break; 339 } 340 return ret; 341} 342 343static int adm1275_write_word_data(struct i2c_client *client, int page, int reg, 344 u16 word) 345{ 346 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 347 const struct adm1275_data *data = to_adm1275_data(info); 348 int ret; 349 350 if (page > 0) 351 return -ENXIO; 352 353 switch (reg) { 354 case PMBUS_IOUT_UC_FAULT_LIMIT: 355 case PMBUS_IOUT_OC_FAULT_LIMIT: 356 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT, 357 word); 358 break; 359 case PMBUS_VIRT_RESET_IOUT_HISTORY: 360 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0); 361 if (!ret && data->have_iout_min) 362 ret = pmbus_write_word_data(client, 0, 363 ADM1293_IOUT_MIN, 0); 364 break; 365 case PMBUS_VIRT_RESET_VOUT_HISTORY: 366 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0); 367 break; 368 case PMBUS_VIRT_RESET_VIN_HISTORY: 369 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0); 370 break; 371 case PMBUS_VIRT_RESET_PIN_HISTORY: 372 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0); 373 if (!ret && data->have_pin_min) 374 ret = pmbus_write_word_data(client, 0, 375 ADM1293_PIN_MIN, 0); 376 break; 377 case PMBUS_VIRT_RESET_TEMP_HISTORY: 378 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0); 379 break; 380 case PMBUS_VIRT_POWER_SAMPLES: 381 if (!data->have_power_sampling) 382 return -ENXIO; 383 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 384 ret = adm1275_write_pmon_config(data, client, true, 385 ilog2(word)); 386 break; 387 case PMBUS_VIRT_IN_SAMPLES: 388 case PMBUS_VIRT_CURR_SAMPLES: 389 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX); 390 ret = adm1275_write_pmon_config(data, client, false, 391 ilog2(word)); 392 break; 393 default: 394 ret = -ENODATA; 395 break; 396 } 397 return ret; 398} 399 400static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg) 401{ 402 const struct pmbus_driver_info *info = pmbus_get_driver_info(client); 403 const struct adm1275_data *data = to_adm1275_data(info); 404 int mfr_status, ret; 405 406 if (page > 0) 407 return -ENXIO; 408 409 switch (reg) { 410 case PMBUS_STATUS_IOUT: 411 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT); 412 if (ret < 0) 413 break; 414 if (!data->have_oc_fault && !data->have_uc_fault) 415 break; 416 mfr_status = pmbus_read_byte_data(client, page, 417 PMBUS_STATUS_MFR_SPECIFIC); 418 if (mfr_status < 0) 419 return mfr_status; 420 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) { 421 ret |= data->have_oc_fault ? 422 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT; 423 } 424 break; 425 case PMBUS_STATUS_VOUT: 426 if (data->have_vout) 427 return -ENODATA; 428 ret = 0; 429 if (data->have_vaux_status) { 430 mfr_status = pmbus_read_byte_data(client, 0, 431 ADM1075_VAUX_STATUS); 432 if (mfr_status < 0) 433 return mfr_status; 434 if (mfr_status & ADM1075_VAUX_OV_WARN) 435 ret |= PB_VOLTAGE_OV_WARNING; 436 if (mfr_status & ADM1075_VAUX_UV_WARN) 437 ret |= PB_VOLTAGE_UV_WARNING; 438 } else if (data->have_mfr_vaux_status) { 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 & ADM1293_MFR_STATUS_VAUX_OV_WARN) 444 ret |= PB_VOLTAGE_OV_WARNING; 445 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN) 446 ret |= PB_VOLTAGE_UV_WARNING; 447 } 448 break; 449 default: 450 ret = -ENODATA; 451 break; 452 } 453 return ret; 454} 455 456static const struct i2c_device_id adm1275_id[] = { 457 { "adm1075", adm1075 }, 458 { "adm1272", adm1272 }, 459 { "adm1275", adm1275 }, 460 { "adm1276", adm1276 }, 461 { "adm1278", adm1278 }, 462 { "adm1293", adm1293 }, 463 { "adm1294", adm1294 }, 464 { } 465}; 466MODULE_DEVICE_TABLE(i2c, adm1275_id); 467 468/* Enable VOUT & TEMP1 if not enabled (disabled by default) */ 469static int adm1275_enable_vout_temp(struct i2c_client *client, int config) 470{ 471 int ret; 472 473 if ((config & ADM1278_PMON_DEFCONFIG) != ADM1278_PMON_DEFCONFIG) { 474 config |= ADM1278_PMON_DEFCONFIG; 475 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG, config); 476 if (ret < 0) { 477 dev_err(&client->dev, "Failed to enable VOUT/TEMP1 monitoring\n"); 478 return ret; 479 } 480 } 481 return 0; 482} 483 484static int adm1275_probe(struct i2c_client *client) 485{ 486 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg); 487 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; 488 int config, device_config; 489 int ret; 490 struct pmbus_driver_info *info; 491 struct adm1275_data *data; 492 const struct i2c_device_id *mid; 493 const struct coefficients *coefficients; 494 int vindex = -1, voindex = -1, cindex = -1, pindex = -1; 495 int tindex = -1; 496 u32 shunt; 497 u32 avg; 498 499 if (!i2c_check_functionality(client->adapter, 500 I2C_FUNC_SMBUS_READ_BYTE_DATA 501 | I2C_FUNC_SMBUS_BLOCK_DATA)) 502 return -ENODEV; 503 504 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer); 505 if (ret < 0) { 506 dev_err(&client->dev, "Failed to read Manufacturer ID\n"); 507 return ret; 508 } 509 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) { 510 dev_err(&client->dev, "Unsupported Manufacturer ID\n"); 511 return -ENODEV; 512 } 513 514 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); 515 if (ret < 0) { 516 dev_err(&client->dev, "Failed to read Manufacturer Model\n"); 517 return ret; 518 } 519 for (mid = adm1275_id; mid->name[0]; mid++) { 520 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) 521 break; 522 } 523 if (!mid->name[0]) { 524 dev_err(&client->dev, "Unsupported device\n"); 525 return -ENODEV; 526 } 527 528 if (strcmp(client->name, mid->name) != 0) 529 dev_notice(&client->dev, 530 "Device mismatch: Configured %s, detected %s\n", 531 client->name, mid->name); 532 533 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 || 534 mid->driver_data == adm1293 || mid->driver_data == adm1294) 535 config_read_fn = i2c_smbus_read_word_data; 536 else 537 config_read_fn = i2c_smbus_read_byte_data; 538 config = config_read_fn(client, ADM1275_PMON_CONFIG); 539 if (config < 0) 540 return config; 541 542 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG); 543 if (device_config < 0) 544 return device_config; 545 546 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data), 547 GFP_KERNEL); 548 if (!data) 549 return -ENOMEM; 550 551 if (of_property_read_u32(client->dev.of_node, 552 "shunt-resistor-micro-ohms", &shunt)) 553 shunt = 1000; /* 1 mOhm if not set via DT */ 554 555 if (shunt == 0) 556 return -EINVAL; 557 558 data->id = mid->driver_data; 559 560 info = &data->info; 561 562 info->pages = 1; 563 info->format[PSC_VOLTAGE_IN] = direct; 564 info->format[PSC_VOLTAGE_OUT] = direct; 565 info->format[PSC_CURRENT_OUT] = direct; 566 info->format[PSC_POWER] = direct; 567 info->format[PSC_TEMPERATURE] = direct; 568 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | 569 PMBUS_HAVE_SAMPLES; 570 571 info->read_word_data = adm1275_read_word_data; 572 info->read_byte_data = adm1275_read_byte_data; 573 info->write_word_data = adm1275_write_word_data; 574 575 switch (data->id) { 576 case adm1075: 577 if (device_config & ADM1275_IOUT_WARN2_SELECT) 578 data->have_oc_fault = true; 579 else 580 data->have_uc_fault = true; 581 data->have_pin_max = true; 582 data->have_vaux_status = true; 583 584 coefficients = adm1075_coefficients; 585 vindex = 0; 586 switch (config & ADM1075_IRANGE_MASK) { 587 case ADM1075_IRANGE_25: 588 cindex = 1; 589 pindex = 3; 590 break; 591 case ADM1075_IRANGE_50: 592 cindex = 2; 593 pindex = 4; 594 break; 595 default: 596 dev_err(&client->dev, "Invalid input current range"); 597 break; 598 } 599 600 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 601 | PMBUS_HAVE_STATUS_INPUT; 602 if (config & ADM1275_VIN_VOUT_SELECT) 603 info->func[0] |= 604 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 605 break; 606 case adm1272: 607 data->have_vout = true; 608 data->have_pin_max = true; 609 data->have_temp_max = true; 610 data->have_power_sampling = true; 611 612 coefficients = adm1272_coefficients; 613 vindex = (config & ADM1275_VRANGE) ? 1 : 0; 614 cindex = (config & ADM1272_IRANGE) ? 3 : 2; 615 /* pindex depends on the combination of the above */ 616 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) { 617 case 0: 618 default: 619 pindex = 4; 620 break; 621 case ADM1275_VRANGE: 622 pindex = 5; 623 break; 624 case ADM1272_IRANGE: 625 pindex = 6; 626 break; 627 case ADM1275_VRANGE | ADM1272_IRANGE: 628 pindex = 7; 629 break; 630 } 631 tindex = 8; 632 633 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 634 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 635 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 636 637 ret = adm1275_enable_vout_temp(client, config); 638 if (ret) 639 return ret; 640 641 if (config & ADM1278_VIN_EN) 642 info->func[0] |= PMBUS_HAVE_VIN; 643 break; 644 case adm1275: 645 if (device_config & ADM1275_IOUT_WARN2_SELECT) 646 data->have_oc_fault = true; 647 else 648 data->have_uc_fault = true; 649 data->have_vout = true; 650 651 coefficients = adm1275_coefficients; 652 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 653 cindex = 2; 654 655 if (config & ADM1275_VIN_VOUT_SELECT) 656 info->func[0] |= 657 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 658 else 659 info->func[0] |= 660 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT; 661 break; 662 case adm1276: 663 if (device_config & ADM1275_IOUT_WARN2_SELECT) 664 data->have_oc_fault = true; 665 else 666 data->have_uc_fault = true; 667 data->have_vout = true; 668 data->have_pin_max = true; 669 670 coefficients = adm1276_coefficients; 671 vindex = (config & ADM1275_VRANGE) ? 0 : 1; 672 cindex = 2; 673 pindex = (config & ADM1275_VRANGE) ? 3 : 4; 674 675 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN 676 | PMBUS_HAVE_STATUS_INPUT; 677 if (config & ADM1275_VIN_VOUT_SELECT) 678 info->func[0] |= 679 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT; 680 break; 681 case adm1278: 682 data->have_vout = true; 683 data->have_pin_max = true; 684 data->have_temp_max = true; 685 data->have_power_sampling = true; 686 687 coefficients = adm1278_coefficients; 688 vindex = 0; 689 cindex = 1; 690 pindex = 2; 691 tindex = 3; 692 693 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT | 694 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | 695 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; 696 697 ret = adm1275_enable_vout_temp(client, config); 698 if (ret) 699 return ret; 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 831static struct i2c_driver adm1275_driver = { 832 .driver = { 833 .name = "adm1275", 834 }, 835 .probe_new = adm1275_probe, 836 .remove = pmbus_do_remove, 837 .id_table = adm1275_id, 838}; 839 840module_i2c_driver(adm1275_driver); 841 842MODULE_AUTHOR("Guenter Roeck"); 843MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles"); 844MODULE_LICENSE("GPL"); 845