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  * Copyright (c) 2018 Guenter Roeck
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/err.h>
  23 #include <linux/slab.h>
  24 #include <linux/i2c.h>
  25 #include <linux/bitops.h>
  26 #include "pmbus.h"
  27
  28 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
  29
  30 #define ADM1275_MFR_STATUS_IOUT_WARN2   BIT(0)
  31 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
  32 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
  33
  34 #define ADM1275_PEAK_IOUT               0xd0
  35 #define ADM1275_PEAK_VIN                0xd1
  36 #define ADM1275_PEAK_VOUT               0xd2
  37 #define ADM1275_PMON_CONFIG             0xd4
  38
  39 #define ADM1275_VIN_VOUT_SELECT         BIT(6)
  40 #define ADM1275_VRANGE                  BIT(5)
  41 #define ADM1075_IRANGE_50               BIT(4)
  42 #define ADM1075_IRANGE_25               BIT(3)
  43 #define ADM1075_IRANGE_MASK             (BIT(3) | BIT(4))
  44
  45 #define ADM1272_IRANGE                  BIT(0)
  46
  47 #define ADM1278_TEMP1_EN                BIT(3)
  48 #define ADM1278_VIN_EN                  BIT(2)
  49 #define ADM1278_VOUT_EN                 BIT(1)
  50
  51 #define ADM1293_IRANGE_25               0
  52 #define ADM1293_IRANGE_50               BIT(6)
  53 #define ADM1293_IRANGE_100              BIT(7)
  54 #define ADM1293_IRANGE_200              (BIT(6) | BIT(7))
  55 #define ADM1293_IRANGE_MASK             (BIT(6) | BIT(7))
  56
  57 #define ADM1293_VIN_SEL_012             BIT(2)
  58 #define ADM1293_VIN_SEL_074             BIT(3)
  59 #define ADM1293_VIN_SEL_210             (BIT(2) | BIT(3))
  60 #define ADM1293_VIN_SEL_MASK            (BIT(2) | BIT(3))
  61
  62 #define ADM1293_VAUX_EN                 BIT(1)
  63
  64 #define ADM1278_PEAK_TEMP               0xd7
  65 #define ADM1275_IOUT_WARN2_LIMIT        0xd7
  66 #define ADM1275_DEVICE_CONFIG           0xd8
  67
  68 #define ADM1275_IOUT_WARN2_SELECT       BIT(4)
  69
  70 #define ADM1276_PEAK_PIN                0xda
  71 #define ADM1075_READ_VAUX               0xdd
  72 #define ADM1075_VAUX_OV_WARN_LIMIT      0xde
  73 #define ADM1075_VAUX_UV_WARN_LIMIT      0xdf
  74 #define ADM1293_IOUT_MIN                0xe3
  75 #define ADM1293_PIN_MIN                 0xe4
  76 #define ADM1075_VAUX_STATUS             0xf6
  77
  78 #define ADM1075_VAUX_OV_WARN            BIT(7)
  79 #define ADM1075_VAUX_UV_WARN            BIT(6)
  80
  81 struct adm1275_data {
  82         int id;
  83         bool have_oc_fault;
  84         bool have_uc_fault;
  85         bool have_vout;
  86         bool have_vaux_status;
  87         bool have_mfr_vaux_status;
  88         bool have_iout_min;
  89         bool have_pin_min;
  90         bool have_pin_max;
  91         bool have_temp_max;
  92         struct pmbus_driver_info info;
  93 };
  94
  95 #define to_adm1275_data(x)  container_of(x, struct adm1275_data, info)
  96
  97 struct coefficients {
  98         s16 m;
  99         s16 b;
 100         s16 R;
 101 };
 102
 103 static const struct coefficients adm1075_coefficients[] = {
 104         [0] = { 27169, 0, -1 },         /* voltage */
 105         [1] = { 806, 20475, -1 },       /* current, irange25 */
 106         [2] = { 404, 20475, -1 },       /* current, irange50 */
 107         [3] = { 8549, 0, -1 },          /* power, irange25 */
 108         [4] = { 4279, 0, -1 },          /* power, irange50 */
 109 };
 110
 111 static const struct coefficients adm1272_coefficients[] = {
 112         [0] = { 6770, 0, -2 },          /* voltage, vrange 60V */
 113         [1] = { 4062, 0, -2 },          /* voltage, vrange 100V */
 114         [2] = { 1326, 20480, -1 },      /* current, vsense range 15mV */
 115         [3] = { 663, 20480, -1 },       /* current, vsense range 30mV */
 116         [4] = { 3512, 0, -2 },          /* power, vrange 60V, irange 15mV */
 117         [5] = { 21071, 0, -3 },         /* power, vrange 100V, irange 15mV */
 118         [6] = { 17561, 0, -3 },         /* power, vrange 60V, irange 30mV */
 119         [7] = { 10535, 0, -3 },         /* power, vrange 100V, irange 30mV */
 120         [8] = { 42, 31871, -1 },        /* temperature */
 121
 122 };
 123
 124 static const struct coefficients adm1275_coefficients[] = {
 125         [0] = { 19199, 0, -2 },         /* voltage, vrange set */
 126         [1] = { 6720, 0, -1 },          /* voltage, vrange not set */
 127         [2] = { 807, 20475, -1 },       /* current */
 128 };
 129
 130 static const struct coefficients adm1276_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         [3] = { 6043, 0, -2 },          /* power, vrange set */
 135         [4] = { 2115, 0, -1 },          /* power, vrange not set */
 136 };
 137
 138 static const struct coefficients adm1278_coefficients[] = {
 139         [0] = { 19599, 0, -2 },         /* voltage */
 140         [1] = { 800, 20475, -1 },       /* current */
 141         [2] = { 6123, 0, -2 },          /* power */
 142         [3] = { 42, 31880, -1 },        /* temperature */
 143 };
 144
 145 static const struct coefficients adm1293_coefficients[] = {
 146         [0] = { 3333, -1, 0 },          /* voltage, vrange 1.2V */
 147         [1] = { 5552, -5, -1 },         /* voltage, vrange 7.4V */
 148         [2] = { 19604, -50, -2 },       /* voltage, vrange 21V */
 149         [3] = { 8000, -100, -2 },       /* current, irange25 */
 150         [4] = { 4000, -100, -2 },       /* current, irange50 */
 151         [5] = { 20000, -1000, -3 },     /* current, irange100 */
 152         [6] = { 10000, -1000, -3 },     /* current, irange200 */
 153         [7] = { 10417, 0, -1 },         /* power, 1.2V, irange25 */
 154         [8] = { 5208, 0, -1 },          /* power, 1.2V, irange50 */
 155         [9] = { 26042, 0, -2 },         /* power, 1.2V, irange100 */
 156         [10] = { 13021, 0, -2 },        /* power, 1.2V, irange200 */
 157         [11] = { 17351, 0, -2 },        /* power, 7.4V, irange25 */
 158         [12] = { 8676, 0, -2 },         /* power, 7.4V, irange50 */
 159         [13] = { 4338, 0, -2 },         /* power, 7.4V, irange100 */
 160         [14] = { 21689, 0, -3 },        /* power, 7.4V, irange200 */
 161         [15] = { 6126, 0, -2 },         /* power, 21V, irange25 */
 162         [16] = { 30631, 0, -3 },        /* power, 21V, irange50 */
 163         [17] = { 15316, 0, -3 },        /* power, 21V, irange100 */
 164         [18] = { 7658, 0, -3 },         /* power, 21V, irange200 */
 165 };
 166
 167 static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
 168 {
 169         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 170         const struct adm1275_data *data = to_adm1275_data(info);
 171         int ret = 0;
 172
 173         if (page > 0)
 174                 return -ENXIO;
 175
 176         switch (reg) {
 177         case PMBUS_IOUT_UC_FAULT_LIMIT:
 178                 if (!data->have_uc_fault)
 179                         return -ENXIO;
 180                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
 181                 break;
 182         case PMBUS_IOUT_OC_FAULT_LIMIT:
 183                 if (!data->have_oc_fault)
 184                         return -ENXIO;
 185                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
 186                 break;
 187         case PMBUS_VOUT_OV_WARN_LIMIT:
 188                 if (data->have_vout)
 189                         return -ENODATA;
 190                 ret = pmbus_read_word_data(client, 0,
 191                                            ADM1075_VAUX_OV_WARN_LIMIT);
 192                 break;
 193         case PMBUS_VOUT_UV_WARN_LIMIT:
 194                 if (data->have_vout)
 195                         return -ENODATA;
 196                 ret = pmbus_read_word_data(client, 0,
 197                                            ADM1075_VAUX_UV_WARN_LIMIT);
 198                 break;
 199         case PMBUS_READ_VOUT:
 200                 if (data->have_vout)
 201                         return -ENODATA;
 202                 ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
 203                 break;
 204         case PMBUS_VIRT_READ_IOUT_MIN:
 205                 if (!data->have_iout_min)
 206                         return -ENXIO;
 207                 ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
 208                 break;
 209         case PMBUS_VIRT_READ_IOUT_MAX:
 210                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
 211                 break;
 212         case PMBUS_VIRT_READ_VOUT_MAX:
 213                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
 214                 break;
 215         case PMBUS_VIRT_READ_VIN_MAX:
 216                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
 217                 break;
 218         case PMBUS_VIRT_READ_PIN_MIN:
 219                 if (!data->have_pin_min)
 220                         return -ENXIO;
 221                 ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
 222                 break;
 223         case PMBUS_VIRT_READ_PIN_MAX:
 224                 if (!data->have_pin_max)
 225                         return -ENXIO;
 226                 ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
 227                 break;
 228         case PMBUS_VIRT_READ_TEMP_MAX:
 229                 if (!data->have_temp_max)
 230                         return -ENXIO;
 231                 ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
 232                 break;
 233         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 234         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 235         case PMBUS_VIRT_RESET_VIN_HISTORY:
 236                 break;
 237         case PMBUS_VIRT_RESET_PIN_HISTORY:
 238                 if (!data->have_pin_max)
 239                         return -ENXIO;
 240                 break;
 241         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 242                 if (!data->have_temp_max)
 243                         return -ENXIO;
 244                 break;
 245         default:
 246                 ret = -ENODATA;
 247                 break;
 248         }
 249         return ret;
 250 }
 251
 252 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
 253                                    u16 word)
 254 {
 255         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 256         const struct adm1275_data *data = to_adm1275_data(info);
 257         int ret;
 258
 259         if (page > 0)
 260                 return -ENXIO;
 261
 262         switch (reg) {
 263         case PMBUS_IOUT_UC_FAULT_LIMIT:
 264         case PMBUS_IOUT_OC_FAULT_LIMIT:
 265                 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
 266                                             word);
 267                 break;
 268         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 269                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
 270                 if (!ret && data->have_iout_min)
 271                         ret = pmbus_write_word_data(client, 0,
 272                                                     ADM1293_IOUT_MIN, 0);
 273                 break;
 274         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 275                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
 276                 break;
 277         case PMBUS_VIRT_RESET_VIN_HISTORY:
 278                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
 279                 break;
 280         case PMBUS_VIRT_RESET_PIN_HISTORY:
 281                 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
 282                 if (!ret && data->have_pin_min)
 283                         ret = pmbus_write_word_data(client, 0,
 284                                                     ADM1293_PIN_MIN, 0);
 285                 break;
 286         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 287                 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
 288                 break;
 289         default:
 290                 ret = -ENODATA;
 291                 break;
 292         }
 293         return ret;
 294 }
 295
 296 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
 297 {
 298         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 299         const struct adm1275_data *data = to_adm1275_data(info);
 300         int mfr_status, ret;
 301
 302         if (page > 0)
 303                 return -ENXIO;
 304
 305         switch (reg) {
 306         case PMBUS_STATUS_IOUT:
 307                 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
 308                 if (ret < 0)
 309                         break;
 310                 if (!data->have_oc_fault && !data->have_uc_fault)
 311                         break;
 312                 mfr_status = pmbus_read_byte_data(client, page,
 313                                                   PMBUS_STATUS_MFR_SPECIFIC);
 314                 if (mfr_status < 0)
 315                         return mfr_status;
 316                 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
 317                         ret |= data->have_oc_fault ?
 318                           PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
 319                 }
 320                 break;
 321         case PMBUS_STATUS_VOUT:
 322                 if (data->have_vout)
 323                         return -ENODATA;
 324                 ret = 0;
 325                 if (data->have_vaux_status) {
 326                         mfr_status = pmbus_read_byte_data(client, 0,
 327                                                           ADM1075_VAUX_STATUS);
 328                         if (mfr_status < 0)
 329                                 return mfr_status;
 330                         if (mfr_status & ADM1075_VAUX_OV_WARN)
 331                                 ret |= PB_VOLTAGE_OV_WARNING;
 332                         if (mfr_status & ADM1075_VAUX_UV_WARN)
 333                                 ret |= PB_VOLTAGE_UV_WARNING;
 334                 } else if (data->have_mfr_vaux_status) {
 335                         mfr_status = pmbus_read_byte_data(client, page,
 336                                                 PMBUS_STATUS_MFR_SPECIFIC);
 337                         if (mfr_status < 0)
 338                                 return mfr_status;
 339                         if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
 340                                 ret |= PB_VOLTAGE_OV_WARNING;
 341                         if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
 342                                 ret |= PB_VOLTAGE_UV_WARNING;
 343                 }
 344                 break;
 345         default:
 346                 ret = -ENODATA;
 347                 break;
 348         }
 349         return ret;
 350 }
 351
 352 static const struct i2c_device_id adm1275_id[] = {
 353         { "adm1075", adm1075 },
 354         { "adm1272", adm1272 },
 355         { "adm1275", adm1275 },
 356         { "adm1276", adm1276 },
 357         { "adm1278", adm1278 },
 358         { "adm1293", adm1293 },
 359         { "adm1294", adm1294 },
 360         { }
 361 };
 362 MODULE_DEVICE_TABLE(i2c, adm1275_id);
 363
 364 static int adm1275_probe(struct i2c_client *client,
 365                          const struct i2c_device_id *id)
 366 {
 367         s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
 368         u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
 369         int config, device_config;
 370         int ret;
 371         struct pmbus_driver_info *info;
 372         struct adm1275_data *data;
 373         const struct i2c_device_id *mid;
 374         const struct coefficients *coefficients;
 375         int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
 376         int tindex = -1;
 377
 378         if (!i2c_check_functionality(client->adapter,
 379                                      I2C_FUNC_SMBUS_READ_BYTE_DATA
 380                                      | I2C_FUNC_SMBUS_BLOCK_DATA))
 381                 return -ENODEV;
 382
 383         ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
 384         if (ret < 0) {
 385                 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
 386                 return ret;
 387         }
 388         if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
 389                 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
 390                 return -ENODEV;
 391         }
 392
 393         ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
 394         if (ret < 0) {
 395                 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
 396                 return ret;
 397         }
 398         for (mid = adm1275_id; mid->name[0]; mid++) {
 399                 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
 400                         break;
 401         }
 402         if (!mid->name[0]) {
 403                 dev_err(&client->dev, "Unsupported device\n");
 404                 return -ENODEV;
 405         }
 406
 407         if (id->driver_data != mid->driver_data)
 408                 dev_notice(&client->dev,
 409                            "Device mismatch: Configured %s, detected %s\n",
 410                            id->name, mid->name);
 411
 412         if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
 413             mid->driver_data == adm1293 || mid->driver_data == adm1294)
 414                 config_read_fn = i2c_smbus_read_word_data;
 415         else
 416                 config_read_fn = i2c_smbus_read_byte_data;
 417         config = config_read_fn(client, ADM1275_PMON_CONFIG);
 418         if (config < 0)
 419                 return config;
 420
 421         device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
 422         if (device_config < 0)
 423                 return device_config;
 424
 425         data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
 426                             GFP_KERNEL);
 427         if (!data)
 428                 return -ENOMEM;
 429
 430         data->id = mid->driver_data;
 431
 432         info = &data->info;
 433
 434         info->pages = 1;
 435         info->format[PSC_VOLTAGE_IN] = direct;
 436         info->format[PSC_VOLTAGE_OUT] = direct;
 437         info->format[PSC_CURRENT_OUT] = direct;
 438         info->format[PSC_POWER] = direct;
 439         info->format[PSC_TEMPERATURE] = direct;
 440         info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
 441
 442         info->read_word_data = adm1275_read_word_data;
 443         info->read_byte_data = adm1275_read_byte_data;
 444         info->write_word_data = adm1275_write_word_data;
 445
 446         switch (data->id) {
 447         case adm1075:
 448                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
 449                         data->have_oc_fault = true;
 450                 else
 451                         data->have_uc_fault = true;
 452                 data->have_pin_max = true;
 453                 data->have_vaux_status = true;
 454
 455                 coefficients = adm1075_coefficients;
 456                 vindex = 0;
 457                 switch (config & ADM1075_IRANGE_MASK) {
 458                 case ADM1075_IRANGE_25:
 459                         cindex = 1;
 460                         pindex = 3;
 461                         break;
 462                 case ADM1075_IRANGE_50:
 463                         cindex = 2;
 464                         pindex = 4;
 465                         break;
 466                 default:
 467                         dev_err(&client->dev, "Invalid input current range");
 468                         break;
 469                 }
 470
 471                 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
 472                   | PMBUS_HAVE_STATUS_INPUT;
 473                 if (config & ADM1275_VIN_VOUT_SELECT)
 474                         info->func[0] |=
 475                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 476                 break;
 477         case adm1272:
 478                 data->have_vout = true;
 479                 data->have_pin_max = true;
 480                 data->have_temp_max = true;
 481
 482                 coefficients = adm1272_coefficients;
 483                 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
 484                 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
 485                 /* pindex depends on the combination of the above */
 486                 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
 487                 case 0:
 488                 default:
 489                         pindex = 4;
 490                         break;
 491                 case ADM1275_VRANGE:
 492                         pindex = 5;
 493                         break;
 494                 case ADM1272_IRANGE:
 495                         pindex = 6;
 496                         break;
 497                 case ADM1275_VRANGE | ADM1272_IRANGE:
 498                         pindex = 7;
 499                         break;
 500                 }
 501                 tindex = 8;
 502
 503                 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
 504                         PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 505
 506                 /* Enable VOUT if not enabled (it is disabled by default) */
 507                 if (!(config & ADM1278_VOUT_EN)) {
 508                         config |= ADM1278_VOUT_EN;
 509                         ret = i2c_smbus_write_byte_data(client,
 510                                                         ADM1275_PMON_CONFIG,
 511                                                         config);
 512                         if (ret < 0) {
 513                                 dev_err(&client->dev,
 514                                         "Failed to enable VOUT monitoring\n");
 515                                 return -ENODEV;
 516                         }
 517                 }
 518
 519                 if (config & ADM1278_TEMP1_EN)
 520                         info->func[0] |=
 521                                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 522                 if (config & ADM1278_VIN_EN)
 523                         info->func[0] |= PMBUS_HAVE_VIN;
 524                 break;
 525         case adm1275:
 526                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
 527                         data->have_oc_fault = true;
 528                 else
 529                         data->have_uc_fault = true;
 530                 data->have_vout = true;
 531
 532                 coefficients = adm1275_coefficients;
 533                 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
 534                 cindex = 2;
 535
 536                 if (config & ADM1275_VIN_VOUT_SELECT)
 537                         info->func[0] |=
 538                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 539                 else
 540                         info->func[0] |=
 541                           PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
 542                 break;
 543         case adm1276:
 544                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
 545                         data->have_oc_fault = true;
 546                 else
 547                         data->have_uc_fault = true;
 548                 data->have_vout = true;
 549                 data->have_pin_max = true;
 550
 551                 coefficients = adm1276_coefficients;
 552                 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
 553                 cindex = 2;
 554                 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
 555
 556                 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
 557                   | PMBUS_HAVE_STATUS_INPUT;
 558                 if (config & ADM1275_VIN_VOUT_SELECT)
 559                         info->func[0] |=
 560                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 561                 break;
 562         case adm1278:
 563                 data->have_vout = true;
 564                 data->have_pin_max = true;
 565                 data->have_temp_max = true;
 566
 567                 coefficients = adm1278_coefficients;
 568                 vindex = 0;
 569                 cindex = 1;
 570                 pindex = 2;
 571                 tindex = 3;
 572
 573                 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
 574                         PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 575
 576                 /* Enable VOUT if not enabled (it is disabled by default) */
 577                 if (!(config & ADM1278_VOUT_EN)) {
 578                         config |= ADM1278_VOUT_EN;
 579                         ret = i2c_smbus_write_byte_data(client,
 580                                                         ADM1275_PMON_CONFIG,
 581                                                         config);
 582                         if (ret < 0) {
 583                                 dev_err(&client->dev,
 584                                         "Failed to enable VOUT monitoring\n");
 585                                 return -ENODEV;
 586                         }
 587                 }
 588
 589                 if (config & ADM1278_TEMP1_EN)
 590                         info->func[0] |=
 591                                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 592                 if (config & ADM1278_VIN_EN)
 593                         info->func[0] |= PMBUS_HAVE_VIN;
 594                 break;
 595         case adm1293:
 596         case adm1294:
 597                 data->have_iout_min = true;
 598                 data->have_pin_min = true;
 599                 data->have_pin_max = true;
 600                 data->have_mfr_vaux_status = true;
 601
 602                 coefficients = adm1293_coefficients;
 603
 604                 voindex = 0;
 605                 switch (config & ADM1293_VIN_SEL_MASK) {
 606                 case ADM1293_VIN_SEL_012:       /* 1.2V */
 607                         vindex = 0;
 608                         break;
 609                 case ADM1293_VIN_SEL_074:       /* 7.4V */
 610                         vindex = 1;
 611                         break;
 612                 case ADM1293_VIN_SEL_210:       /* 21V */
 613                         vindex = 2;
 614                         break;
 615                 default:                        /* disabled */
 616                         break;
 617                 }
 618
 619                 switch (config & ADM1293_IRANGE_MASK) {
 620                 case ADM1293_IRANGE_25:
 621                         cindex = 3;
 622                         break;
 623                 case ADM1293_IRANGE_50:
 624                         cindex = 4;
 625                         break;
 626                 case ADM1293_IRANGE_100:
 627                         cindex = 5;
 628                         break;
 629                 case ADM1293_IRANGE_200:
 630                         cindex = 6;
 631                         break;
 632                 }
 633
 634                 if (vindex >= 0)
 635                         pindex = 7 + vindex * 4 + (cindex - 3);
 636
 637                 if (config & ADM1293_VAUX_EN)
 638                         info->func[0] |=
 639                                 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 640
 641                 info->func[0] |= PMBUS_HAVE_PIN |
 642                         PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
 643
 644                 break;
 645         default:
 646                 dev_err(&client->dev, "Unsupported device\n");
 647                 return -ENODEV;
 648         }
 649
 650         if (voindex < 0)
 651                 voindex = vindex;
 652         if (vindex >= 0) {
 653                 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
 654                 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
 655                 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
 656         }
 657         if (voindex >= 0) {
 658                 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
 659                 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
 660                 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
 661         }
 662         if (cindex >= 0) {
 663                 info->m[PSC_CURRENT_OUT] = coefficients[cindex].m;
 664                 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
 665                 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
 666         }
 667         if (pindex >= 0) {
 668                 info->m[PSC_POWER] = coefficients[pindex].m;
 669                 info->b[PSC_POWER] = coefficients[pindex].b;
 670                 info->R[PSC_POWER] = coefficients[pindex].R;
 671         }
 672         if (tindex >= 0) {
 673                 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
 674                 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
 675                 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
 676         }
 677
 678         return pmbus_do_probe(client, id, info);
 679 }
 680
 681 static struct i2c_driver adm1275_driver = {
 682         .driver = {
 683                    .name = "adm1275",
 684                    },
 685         .probe = adm1275_probe,
 686         .remove = pmbus_do_remove,
 687         .id_table = adm1275_id,
 688 };
 689
 690 module_i2c_driver(adm1275_driver);
 691
 692 MODULE_AUTHOR("Guenter Roeck");
 693 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
 694 MODULE_LICENSE("GPL");