drivers/hwmon/pmbus/adm1275.c

   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 "pmbus.h"
  18
  19 enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
  20
  21 #define ADM1275_MFR_STATUS_IOUT_WARN2   BIT(0)
  22 #define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
  23 #define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
  24
  25 #define ADM1275_PEAK_IOUT               0xd0
  26 #define ADM1275_PEAK_VIN                0xd1
  27 #define ADM1275_PEAK_VOUT               0xd2
  28 #define ADM1275_PMON_CONFIG             0xd4
  29
  30 #define ADM1275_VIN_VOUT_SELECT         BIT(6)
  31 #define ADM1275_VRANGE                  BIT(5)
  32 #define ADM1075_IRANGE_50               BIT(4)
  33 #define ADM1075_IRANGE_25               BIT(3)
  34 #define ADM1075_IRANGE_MASK             (BIT(3) | BIT(4))
  35
  36 #define ADM1272_IRANGE                  BIT(0)
  37
  38 #define ADM1278_TEMP1_EN                BIT(3)
  39 #define ADM1278_VIN_EN                  BIT(2)
  40 #define ADM1278_VOUT_EN                 BIT(1)
  41
  42 #define ADM1293_IRANGE_25               0
  43 #define ADM1293_IRANGE_50               BIT(6)
  44 #define ADM1293_IRANGE_100              BIT(7)
  45 #define ADM1293_IRANGE_200              (BIT(6) | BIT(7))
  46 #define ADM1293_IRANGE_MASK             (BIT(6) | BIT(7))
  47
  48 #define ADM1293_VIN_SEL_012             BIT(2)
  49 #define ADM1293_VIN_SEL_074             BIT(3)
  50 #define ADM1293_VIN_SEL_210             (BIT(2) | BIT(3))
  51 #define ADM1293_VIN_SEL_MASK            (BIT(2) | BIT(3))
  52
  53 #define ADM1293_VAUX_EN                 BIT(1)
  54
  55 #define ADM1278_PEAK_TEMP               0xd7
  56 #define ADM1275_IOUT_WARN2_LIMIT        0xd7
  57 #define ADM1275_DEVICE_CONFIG           0xd8
  58
  59 #define ADM1275_IOUT_WARN2_SELECT       BIT(4)
  60
  61 #define ADM1276_PEAK_PIN                0xda
  62 #define ADM1075_READ_VAUX               0xdd
  63 #define ADM1075_VAUX_OV_WARN_LIMIT      0xde
  64 #define ADM1075_VAUX_UV_WARN_LIMIT      0xdf
  65 #define ADM1293_IOUT_MIN                0xe3
  66 #define ADM1293_PIN_MIN                 0xe4
  67 #define ADM1075_VAUX_STATUS             0xf6
  68
  69 #define ADM1075_VAUX_OV_WARN            BIT(7)
  70 #define ADM1075_VAUX_UV_WARN            BIT(6)
  71
  72 struct adm1275_data {
  73         int id;
  74         bool have_oc_fault;
  75         bool have_uc_fault;
  76         bool have_vout;
  77         bool have_vaux_status;
  78         bool have_mfr_vaux_status;
  79         bool have_iout_min;
  80         bool have_pin_min;
  81         bool have_pin_max;
  82         bool have_temp_max;
  83         struct pmbus_driver_info info;
  84 };
  85
  86 #define to_adm1275_data(x)  container_of(x, struct adm1275_data, info)
  87
  88 struct coefficients {
  89         s16 m;
  90         s16 b;
  91         s16 R;
  92 };
  93
  94 static const struct coefficients adm1075_coefficients[] = {
  95         [0] = { 27169, 0, -1 },         /* voltage */
  96         [1] = { 806, 20475, -1 },       /* current, irange25 */
  97         [2] = { 404, 20475, -1 },       /* current, irange50 */
  98         [3] = { 8549, 0, -1 },          /* power, irange25 */
  99         [4] = { 4279, 0, -1 },          /* power, irange50 */
 100 };
 101
 102 static const struct coefficients adm1272_coefficients[] = {
 103         [0] = { 6770, 0, -2 },          /* voltage, vrange 60V */
 104         [1] = { 4062, 0, -2 },          /* voltage, vrange 100V */
 105         [2] = { 1326, 20480, -1 },      /* current, vsense range 15mV */
 106         [3] = { 663, 20480, -1 },       /* current, vsense range 30mV */
 107         [4] = { 3512, 0, -2 },          /* power, vrange 60V, irange 15mV */
 108         [5] = { 21071, 0, -3 },         /* power, vrange 100V, irange 15mV */
 109         [6] = { 17561, 0, -3 },         /* power, vrange 60V, irange 30mV */
 110         [7] = { 10535, 0, -3 },         /* power, vrange 100V, irange 30mV */
 111         [8] = { 42, 31871, -1 },        /* temperature */
 112
 113 };
 114
 115 static const struct coefficients adm1275_coefficients[] = {
 116         [0] = { 19199, 0, -2 },         /* voltage, vrange set */
 117         [1] = { 6720, 0, -1 },          /* voltage, vrange not set */
 118         [2] = { 807, 20475, -1 },       /* current */
 119 };
 120
 121 static const struct coefficients adm1276_coefficients[] = {
 122         [0] = { 19199, 0, -2 },         /* voltage, vrange set */
 123         [1] = { 6720, 0, -1 },          /* voltage, vrange not set */
 124         [2] = { 807, 20475, -1 },       /* current */
 125         [3] = { 6043, 0, -2 },          /* power, vrange set */
 126         [4] = { 2115, 0, -1 },          /* power, vrange not set */
 127 };
 128
 129 static const struct coefficients adm1278_coefficients[] = {
 130         [0] = { 19599, 0, -2 },         /* voltage */
 131         [1] = { 800, 20475, -1 },       /* current */
 132         [2] = { 6123, 0, -2 },          /* power */
 133         [3] = { 42, 31880, -1 },        /* temperature */
 134 };
 135
 136 static const struct coefficients adm1293_coefficients[] = {
 137         [0] = { 3333, -1, 0 },          /* voltage, vrange 1.2V */
 138         [1] = { 5552, -5, -1 },         /* voltage, vrange 7.4V */
 139         [2] = { 19604, -50, -2 },       /* voltage, vrange 21V */
 140         [3] = { 8000, -100, -2 },       /* current, irange25 */
 141         [4] = { 4000, -100, -2 },       /* current, irange50 */
 142         [5] = { 20000, -1000, -3 },     /* current, irange100 */
 143         [6] = { 10000, -1000, -3 },     /* current, irange200 */
 144         [7] = { 10417, 0, -1 },         /* power, 1.2V, irange25 */
 145         [8] = { 5208, 0, -1 },          /* power, 1.2V, irange50 */
 146         [9] = { 26042, 0, -2 },         /* power, 1.2V, irange100 */
 147         [10] = { 13021, 0, -2 },        /* power, 1.2V, irange200 */
 148         [11] = { 17351, 0, -2 },        /* power, 7.4V, irange25 */
 149         [12] = { 8676, 0, -2 },         /* power, 7.4V, irange50 */
 150         [13] = { 4338, 0, -2 },         /* power, 7.4V, irange100 */
 151         [14] = { 21689, 0, -3 },        /* power, 7.4V, irange200 */
 152         [15] = { 6126, 0, -2 },         /* power, 21V, irange25 */
 153         [16] = { 30631, 0, -3 },        /* power, 21V, irange50 */
 154         [17] = { 15316, 0, -3 },        /* power, 21V, irange100 */
 155         [18] = { 7658, 0, -3 },         /* power, 21V, irange200 */
 156 };
 157
 158 static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
 159 {
 160         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 161         const struct adm1275_data *data = to_adm1275_data(info);
 162         int ret = 0;
 163
 164         if (page > 0)
 165                 return -ENXIO;
 166
 167         switch (reg) {
 168         case PMBUS_IOUT_UC_FAULT_LIMIT:
 169                 if (!data->have_uc_fault)
 170                         return -ENXIO;
 171                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
 172                 break;
 173         case PMBUS_IOUT_OC_FAULT_LIMIT:
 174                 if (!data->have_oc_fault)
 175                         return -ENXIO;
 176                 ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
 177                 break;
 178         case PMBUS_VOUT_OV_WARN_LIMIT:
 179                 if (data->have_vout)
 180                         return -ENODATA;
 181                 ret = pmbus_read_word_data(client, 0,
 182                                            ADM1075_VAUX_OV_WARN_LIMIT);
 183                 break;
 184         case PMBUS_VOUT_UV_WARN_LIMIT:
 185                 if (data->have_vout)
 186                         return -ENODATA;
 187                 ret = pmbus_read_word_data(client, 0,
 188                                            ADM1075_VAUX_UV_WARN_LIMIT);
 189                 break;
 190         case PMBUS_READ_VOUT:
 191                 if (data->have_vout)
 192                         return -ENODATA;
 193                 ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
 194                 break;
 195         case PMBUS_VIRT_READ_IOUT_MIN:
 196                 if (!data->have_iout_min)
 197                         return -ENXIO;
 198                 ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
 199                 break;
 200         case PMBUS_VIRT_READ_IOUT_MAX:
 201                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
 202                 break;
 203         case PMBUS_VIRT_READ_VOUT_MAX:
 204                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
 205                 break;
 206         case PMBUS_VIRT_READ_VIN_MAX:
 207                 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
 208                 break;
 209         case PMBUS_VIRT_READ_PIN_MIN:
 210                 if (!data->have_pin_min)
 211                         return -ENXIO;
 212                 ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
 213                 break;
 214         case PMBUS_VIRT_READ_PIN_MAX:
 215                 if (!data->have_pin_max)
 216                         return -ENXIO;
 217                 ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
 218                 break;
 219         case PMBUS_VIRT_READ_TEMP_MAX:
 220                 if (!data->have_temp_max)
 221                         return -ENXIO;
 222                 ret = pmbus_read_word_data(client, 0, ADM1278_PEAK_TEMP);
 223                 break;
 224         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 225         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 226         case PMBUS_VIRT_RESET_VIN_HISTORY:
 227                 break;
 228         case PMBUS_VIRT_RESET_PIN_HISTORY:
 229                 if (!data->have_pin_max)
 230                         return -ENXIO;
 231                 break;
 232         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 233                 if (!data->have_temp_max)
 234                         return -ENXIO;
 235                 break;
 236         default:
 237                 ret = -ENODATA;
 238                 break;
 239         }
 240         return ret;
 241 }
 242
 243 static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
 244                                    u16 word)
 245 {
 246         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 247         const struct adm1275_data *data = to_adm1275_data(info);
 248         int ret;
 249
 250         if (page > 0)
 251                 return -ENXIO;
 252
 253         switch (reg) {
 254         case PMBUS_IOUT_UC_FAULT_LIMIT:
 255         case PMBUS_IOUT_OC_FAULT_LIMIT:
 256                 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
 257                                             word);
 258                 break;
 259         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 260                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
 261                 if (!ret && data->have_iout_min)
 262                         ret = pmbus_write_word_data(client, 0,
 263                                                     ADM1293_IOUT_MIN, 0);
 264                 break;
 265         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 266                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
 267                 break;
 268         case PMBUS_VIRT_RESET_VIN_HISTORY:
 269                 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
 270                 break;
 271         case PMBUS_VIRT_RESET_PIN_HISTORY:
 272                 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
 273                 if (!ret && data->have_pin_min)
 274                         ret = pmbus_write_word_data(client, 0,
 275                                                     ADM1293_PIN_MIN, 0);
 276                 break;
 277         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 278                 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
 279                 break;
 280         default:
 281                 ret = -ENODATA;
 282                 break;
 283         }
 284         return ret;
 285 }
 286
 287 static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
 288 {
 289         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 290         const struct adm1275_data *data = to_adm1275_data(info);
 291         int mfr_status, ret;
 292
 293         if (page > 0)
 294                 return -ENXIO;
 295
 296         switch (reg) {
 297         case PMBUS_STATUS_IOUT:
 298                 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
 299                 if (ret < 0)
 300                         break;
 301                 if (!data->have_oc_fault && !data->have_uc_fault)
 302                         break;
 303                 mfr_status = pmbus_read_byte_data(client, page,
 304                                                   PMBUS_STATUS_MFR_SPECIFIC);
 305                 if (mfr_status < 0)
 306                         return mfr_status;
 307                 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
 308                         ret |= data->have_oc_fault ?
 309                           PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
 310                 }
 311                 break;
 312         case PMBUS_STATUS_VOUT:
 313                 if (data->have_vout)
 314                         return -ENODATA;
 315                 ret = 0;
 316                 if (data->have_vaux_status) {
 317                         mfr_status = pmbus_read_byte_data(client, 0,
 318                                                           ADM1075_VAUX_STATUS);
 319                         if (mfr_status < 0)
 320                                 return mfr_status;
 321                         if (mfr_status & ADM1075_VAUX_OV_WARN)
 322                                 ret |= PB_VOLTAGE_OV_WARNING;
 323                         if (mfr_status & ADM1075_VAUX_UV_WARN)
 324                                 ret |= PB_VOLTAGE_UV_WARNING;
 325                 } else if (data->have_mfr_vaux_status) {
 326                         mfr_status = pmbus_read_byte_data(client, page,
 327                                                 PMBUS_STATUS_MFR_SPECIFIC);
 328                         if (mfr_status < 0)
 329                                 return mfr_status;
 330                         if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
 331                                 ret |= PB_VOLTAGE_OV_WARNING;
 332                         if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
 333                                 ret |= PB_VOLTAGE_UV_WARNING;
 334                 }
 335                 break;
 336         default:
 337                 ret = -ENODATA;
 338                 break;
 339         }
 340         return ret;
 341 }
 342
 343 static const struct i2c_device_id adm1275_id[] = {
 344         { "adm1075", adm1075 },
 345         { "adm1272", adm1272 },
 346         { "adm1275", adm1275 },
 347         { "adm1276", adm1276 },
 348         { "adm1278", adm1278 },
 349         { "adm1293", adm1293 },
 350         { "adm1294", adm1294 },
 351         { }
 352 };
 353 MODULE_DEVICE_TABLE(i2c, adm1275_id);
 354
 355 static int adm1275_probe(struct i2c_client *client,
 356                          const struct i2c_device_id *id)
 357 {
 358         u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
 359         int config, device_config;
 360         int ret;
 361         struct pmbus_driver_info *info;
 362         struct adm1275_data *data;
 363         const struct i2c_device_id *mid;
 364         const struct coefficients *coefficients;
 365         int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
 366         int tindex = -1;
 367         u32 shunt;
 368
 369         if (!i2c_check_functionality(client->adapter,
 370                                      I2C_FUNC_SMBUS_READ_BYTE_DATA
 371                                      | I2C_FUNC_SMBUS_BLOCK_DATA))
 372                 return -ENODEV;
 373
 374         ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
 375         if (ret < 0) {
 376                 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
 377                 return ret;
 378         }
 379         if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
 380                 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
 381                 return -ENODEV;
 382         }
 383
 384         ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
 385         if (ret < 0) {
 386                 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
 387                 return ret;
 388         }
 389         for (mid = adm1275_id; mid->name[0]; mid++) {
 390                 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
 391                         break;
 392         }
 393         if (!mid->name[0]) {
 394                 dev_err(&client->dev, "Unsupported device\n");
 395                 return -ENODEV;
 396         }
 397
 398         if (id->driver_data != mid->driver_data)
 399                 dev_notice(&client->dev,
 400                            "Device mismatch: Configured %s, detected %s\n",
 401                            id->name, mid->name);
 402
 403         config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
 404         if (config < 0)
 405                 return config;
 406
 407         device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
 408         if (device_config < 0)
 409                 return device_config;
 410
 411         data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
 412                             GFP_KERNEL);
 413         if (!data)
 414                 return -ENOMEM;
 415
 416         if (of_property_read_u32(client->dev.of_node,
 417                                  "shunt-resistor-micro-ohms", &shunt))
 418                 shunt = 1000; /* 1 mOhm if not set via DT */
 419
 420         if (shunt == 0)
 421                 return -EINVAL;
 422
 423         data->id = mid->driver_data;
 424
 425         info = &data->info;
 426
 427         info->pages = 1;
 428         info->format[PSC_VOLTAGE_IN] = direct;
 429         info->format[PSC_VOLTAGE_OUT] = direct;
 430         info->format[PSC_CURRENT_OUT] = direct;
 431         info->format[PSC_POWER] = direct;
 432         info->format[PSC_TEMPERATURE] = direct;
 433         info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
 434
 435         info->read_word_data = adm1275_read_word_data;
 436         info->read_byte_data = adm1275_read_byte_data;
 437         info->write_word_data = adm1275_write_word_data;
 438
 439         switch (data->id) {
 440         case adm1075:
 441                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
 442                         data->have_oc_fault = true;
 443                 else
 444                         data->have_uc_fault = true;
 445                 data->have_pin_max = true;
 446                 data->have_vaux_status = true;
 447
 448                 coefficients = adm1075_coefficients;
 449                 vindex = 0;
 450                 switch (config & ADM1075_IRANGE_MASK) {
 451                 case ADM1075_IRANGE_25:
 452                         cindex = 1;
 453                         pindex = 3;
 454                         break;
 455                 case ADM1075_IRANGE_50:
 456                         cindex = 2;
 457                         pindex = 4;
 458                         break;
 459                 default:
 460                         dev_err(&client->dev, "Invalid input current range");
 461                         break;
 462                 }
 463
 464                 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
 465                   | PMBUS_HAVE_STATUS_INPUT;
 466                 if (config & ADM1275_VIN_VOUT_SELECT)
 467                         info->func[0] |=
 468                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 469                 break;
 470         case adm1272:
 471                 data->have_vout = true;
 472                 data->have_pin_max = true;
 473                 data->have_temp_max = true;
 474
 475                 coefficients = adm1272_coefficients;
 476                 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
 477                 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
 478                 /* pindex depends on the combination of the above */
 479                 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
 480                 case 0:
 481                 default:
 482                         pindex = 4;
 483                         break;
 484                 case ADM1275_VRANGE:
 485                         pindex = 5;
 486                         break;
 487                 case ADM1272_IRANGE:
 488                         pindex = 6;
 489                         break;
 490                 case ADM1275_VRANGE | ADM1272_IRANGE:
 491                         pindex = 7;
 492                         break;
 493                 }
 494                 tindex = 8;
 495
 496                 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
 497                         PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 498
 499                 /* Enable VOUT if not enabled (it is disabled by default) */
 500                 if (!(config & ADM1278_VOUT_EN)) {
 501                         config |= ADM1278_VOUT_EN;
 502                         ret = i2c_smbus_write_byte_data(client,
 503                                                         ADM1275_PMON_CONFIG,
 504                                                         config);
 505                         if (ret < 0) {
 506                                 dev_err(&client->dev,
 507                                         "Failed to enable VOUT monitoring\n");
 508                                 return -ENODEV;
 509                         }
 510                 }
 511
 512                 if (config & ADM1278_TEMP1_EN)
 513                         info->func[0] |=
 514                                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 515                 if (config & ADM1278_VIN_EN)
 516                         info->func[0] |= PMBUS_HAVE_VIN;
 517                 break;
 518         case adm1275:
 519                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
 520                         data->have_oc_fault = true;
 521                 else
 522                         data->have_uc_fault = true;
 523                 data->have_vout = true;
 524
 525                 coefficients = adm1275_coefficients;
 526                 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
 527                 cindex = 2;
 528
 529                 if (config & ADM1275_VIN_VOUT_SELECT)
 530                         info->func[0] |=
 531                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 532                 else
 533                         info->func[0] |=
 534                           PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
 535                 break;
 536         case adm1276:
 537                 if (device_config & ADM1275_IOUT_WARN2_SELECT)
 538                         data->have_oc_fault = true;
 539                 else
 540                         data->have_uc_fault = true;
 541                 data->have_vout = true;
 542                 data->have_pin_max = true;
 543
 544                 coefficients = adm1276_coefficients;
 545                 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
 546                 cindex = 2;
 547                 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
 548
 549                 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
 550                   | PMBUS_HAVE_STATUS_INPUT;
 551                 if (config & ADM1275_VIN_VOUT_SELECT)
 552                         info->func[0] |=
 553                           PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 554                 break;
 555         case adm1278:
 556                 data->have_vout = true;
 557                 data->have_pin_max = true;
 558                 data->have_temp_max = true;
 559
 560                 coefficients = adm1278_coefficients;
 561                 vindex = 0;
 562                 cindex = 1;
 563                 pindex = 2;
 564                 tindex = 3;
 565
 566                 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
 567                         PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 568
 569                 /* Enable VOUT if not enabled (it is disabled by default) */
 570                 if (!(config & ADM1278_VOUT_EN)) {
 571                         config |= ADM1278_VOUT_EN;
 572                         ret = i2c_smbus_write_byte_data(client,
 573                                                         ADM1275_PMON_CONFIG,
 574                                                         config);
 575                         if (ret < 0) {
 576                                 dev_err(&client->dev,
 577                                         "Failed to enable VOUT monitoring\n");
 578                                 return -ENODEV;
 579                         }
 580                 }
 581
 582                 if (config & ADM1278_TEMP1_EN)
 583                         info->func[0] |=
 584                                 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
 585                 if (config & ADM1278_VIN_EN)
 586                         info->func[0] |= PMBUS_HAVE_VIN;
 587                 break;
 588         case adm1293:
 589         case adm1294:
 590                 data->have_iout_min = true;
 591                 data->have_pin_min = true;
 592                 data->have_pin_max = true;
 593                 data->have_mfr_vaux_status = true;
 594
 595                 coefficients = adm1293_coefficients;
 596
 597                 voindex = 0;
 598                 switch (config & ADM1293_VIN_SEL_MASK) {
 599                 case ADM1293_VIN_SEL_012:       /* 1.2V */
 600                         vindex = 0;
 601                         break;
 602                 case ADM1293_VIN_SEL_074:       /* 7.4V */
 603                         vindex = 1;
 604                         break;
 605                 case ADM1293_VIN_SEL_210:       /* 21V */
 606                         vindex = 2;
 607                         break;
 608                 default:                        /* disabled */
 609                         break;
 610                 }
 611
 612                 switch (config & ADM1293_IRANGE_MASK) {
 613                 case ADM1293_IRANGE_25:
 614                         cindex = 3;
 615                         break;
 616                 case ADM1293_IRANGE_50:
 617                         cindex = 4;
 618                         break;
 619                 case ADM1293_IRANGE_100:
 620                         cindex = 5;
 621                         break;
 622                 case ADM1293_IRANGE_200:
 623                         cindex = 6;
 624                         break;
 625                 }
 626
 627                 if (vindex >= 0)
 628                         pindex = 7 + vindex * 4 + (cindex - 3);
 629
 630                 if (config & ADM1293_VAUX_EN)
 631                         info->func[0] |=
 632                                 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
 633
 634                 info->func[0] |= PMBUS_HAVE_PIN |
 635                         PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
 636
 637                 break;
 638         default:
 639                 dev_err(&client->dev, "Unsupported device\n");
 640                 return -ENODEV;
 641         }
 642
 643         if (voindex < 0)
 644                 voindex = vindex;
 645         if (vindex >= 0) {
 646                 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
 647                 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
 648                 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
 649         }
 650         if (voindex >= 0) {
 651                 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
 652                 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
 653                 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
 654         }
 655         if (cindex >= 0) {
 656                 /* Scale current with sense resistor value */
 657                 info->m[PSC_CURRENT_OUT] =
 658                         coefficients[cindex].m * shunt / 1000;
 659                 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
 660                 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
 661         }
 662         if (pindex >= 0) {
 663                 info->m[PSC_POWER] =
 664                         coefficients[pindex].m * shunt / 1000;
 665                 info->b[PSC_POWER] = coefficients[pindex].b;
 666                 info->R[PSC_POWER] = coefficients[pindex].R;
 667         }
 668         if (tindex >= 0) {
 669                 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
 670                 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
 671                 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
 672         }
 673
 674         return pmbus_do_probe(client, id, info);
 675 }
 676
 677 static struct i2c_driver adm1275_driver = {
 678         .driver = {
 679                    .name = "adm1275",
 680                    },
 681         .probe = adm1275_probe,
 682         .remove = pmbus_do_remove,
 683         .id_table = adm1275_id,
 684 };
 685
 686 module_i2c_driver(adm1275_driver);
 687
 688 MODULE_AUTHOR("Guenter Roeck");
 689 MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
 690 MODULE_LICENSE("GPL");