drivers/hwmon/pmbus/adm1275.c

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