drivers/hwmon/pmbus/max34440.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Hardware monitoring driver for Maxim MAX34440/MAX34441
   4  *
   5  * Copyright (c) 2011 Ericsson AB.
   6  * Copyright (c) 2012 Guenter Roeck
   7  */
   8
   9 #include <linux/bitops.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/err.h>
  14 #include <linux/i2c.h>
  15 #include "pmbus.h"
  16
  17 enum chips { max34440, max34441, max34446, max34451, max34460, max34461 };
  18
  19 #define MAX34440_MFR_VOUT_PEAK          0xd4
  20 #define MAX34440_MFR_IOUT_PEAK          0xd5
  21 #define MAX34440_MFR_TEMPERATURE_PEAK   0xd6
  22 #define MAX34440_MFR_VOUT_MIN           0xd7
  23
  24 #define MAX34446_MFR_POUT_PEAK          0xe0
  25 #define MAX34446_MFR_POUT_AVG           0xe1
  26 #define MAX34446_MFR_IOUT_AVG           0xe2
  27 #define MAX34446_MFR_TEMPERATURE_AVG    0xe3
  28
  29 #define MAX34440_STATUS_OC_WARN         BIT(0)
  30 #define MAX34440_STATUS_OC_FAULT        BIT(1)
  31 #define MAX34440_STATUS_OT_FAULT        BIT(5)
  32 #define MAX34440_STATUS_OT_WARN         BIT(6)
  33
  34 #define MAX34451_MFR_CHANNEL_CONFIG     0xe4
  35 #define MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK    0x3f
  36
  37 struct max34440_data {
  38         int id;
  39         struct pmbus_driver_info info;
  40 };
  41
  42 #define to_max34440_data(x)  container_of(x, struct max34440_data, info)
  43
  44 static int max34440_read_word_data(struct i2c_client *client, int page, int reg)
  45 {
  46         int ret;
  47         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
  48         const struct max34440_data *data = to_max34440_data(info);
  49
  50         switch (reg) {
  51         case PMBUS_VIRT_READ_VOUT_MIN:
  52                 ret = pmbus_read_word_data(client, page,
  53                                            MAX34440_MFR_VOUT_MIN);
  54                 break;
  55         case PMBUS_VIRT_READ_VOUT_MAX:
  56                 ret = pmbus_read_word_data(client, page,
  57                                            MAX34440_MFR_VOUT_PEAK);
  58                 break;
  59         case PMBUS_VIRT_READ_IOUT_AVG:
  60                 if (data->id != max34446 && data->id != max34451)
  61                         return -ENXIO;
  62                 ret = pmbus_read_word_data(client, page,
  63                                            MAX34446_MFR_IOUT_AVG);
  64                 break;
  65         case PMBUS_VIRT_READ_IOUT_MAX:
  66                 ret = pmbus_read_word_data(client, page,
  67                                            MAX34440_MFR_IOUT_PEAK);
  68                 break;
  69         case PMBUS_VIRT_READ_POUT_AVG:
  70                 if (data->id != max34446)
  71                         return -ENXIO;
  72                 ret = pmbus_read_word_data(client, page,
  73                                            MAX34446_MFR_POUT_AVG);
  74                 break;
  75         case PMBUS_VIRT_READ_POUT_MAX:
  76                 if (data->id != max34446)
  77                         return -ENXIO;
  78                 ret = pmbus_read_word_data(client, page,
  79                                            MAX34446_MFR_POUT_PEAK);
  80                 break;
  81         case PMBUS_VIRT_READ_TEMP_AVG:
  82                 if (data->id != max34446 && data->id != max34460 &&
  83                     data->id != max34461)
  84                         return -ENXIO;
  85                 ret = pmbus_read_word_data(client, page,
  86                                            MAX34446_MFR_TEMPERATURE_AVG);
  87                 break;
  88         case PMBUS_VIRT_READ_TEMP_MAX:
  89                 ret = pmbus_read_word_data(client, page,
  90                                            MAX34440_MFR_TEMPERATURE_PEAK);
  91                 break;
  92         case PMBUS_VIRT_RESET_POUT_HISTORY:
  93                 if (data->id != max34446)
  94                         return -ENXIO;
  95                 ret = 0;
  96                 break;
  97         case PMBUS_VIRT_RESET_VOUT_HISTORY:
  98         case PMBUS_VIRT_RESET_IOUT_HISTORY:
  99         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 100                 ret = 0;
 101                 break;
 102         default:
 103                 ret = -ENODATA;
 104                 break;
 105         }
 106         return ret;
 107 }
 108
 109 static int max34440_write_word_data(struct i2c_client *client, int page,
 110                                     int reg, u16 word)
 111 {
 112         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 113         const struct max34440_data *data = to_max34440_data(info);
 114         int ret;
 115
 116         switch (reg) {
 117         case PMBUS_VIRT_RESET_POUT_HISTORY:
 118                 ret = pmbus_write_word_data(client, page,
 119                                             MAX34446_MFR_POUT_PEAK, 0);
 120                 if (ret)
 121                         break;
 122                 ret = pmbus_write_word_data(client, page,
 123                                             MAX34446_MFR_POUT_AVG, 0);
 124                 break;
 125         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 126                 ret = pmbus_write_word_data(client, page,
 127                                             MAX34440_MFR_VOUT_MIN, 0x7fff);
 128                 if (ret)
 129                         break;
 130                 ret = pmbus_write_word_data(client, page,
 131                                             MAX34440_MFR_VOUT_PEAK, 0);
 132                 break;
 133         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 134                 ret = pmbus_write_word_data(client, page,
 135                                             MAX34440_MFR_IOUT_PEAK, 0);
 136                 if (!ret && (data->id == max34446 || data->id == max34451))
 137                         ret = pmbus_write_word_data(client, page,
 138                                         MAX34446_MFR_IOUT_AVG, 0);
 139
 140                 break;
 141         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 142                 ret = pmbus_write_word_data(client, page,
 143                                             MAX34440_MFR_TEMPERATURE_PEAK,
 144                                             0x8000);
 145                 if (!ret && data->id == max34446)
 146                         ret = pmbus_write_word_data(client, page,
 147                                         MAX34446_MFR_TEMPERATURE_AVG, 0);
 148                 break;
 149         default:
 150                 ret = -ENODATA;
 151                 break;
 152         }
 153         return ret;
 154 }
 155
 156 static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)
 157 {
 158         int ret = 0;
 159         int mfg_status;
 160
 161         if (page >= 0) {
 162                 ret = pmbus_set_page(client, page);
 163                 if (ret < 0)
 164                         return ret;
 165         }
 166
 167         switch (reg) {
 168         case PMBUS_STATUS_IOUT:
 169                 mfg_status = pmbus_read_word_data(client, 0,
 170                                                   PMBUS_STATUS_MFR_SPECIFIC);
 171                 if (mfg_status < 0)
 172                         return mfg_status;
 173                 if (mfg_status & MAX34440_STATUS_OC_WARN)
 174                         ret |= PB_IOUT_OC_WARNING;
 175                 if (mfg_status & MAX34440_STATUS_OC_FAULT)
 176                         ret |= PB_IOUT_OC_FAULT;
 177                 break;
 178         case PMBUS_STATUS_TEMPERATURE:
 179                 mfg_status = pmbus_read_word_data(client, 0,
 180                                                   PMBUS_STATUS_MFR_SPECIFIC);
 181                 if (mfg_status < 0)
 182                         return mfg_status;
 183                 if (mfg_status & MAX34440_STATUS_OT_WARN)
 184                         ret |= PB_TEMP_OT_WARNING;
 185                 if (mfg_status & MAX34440_STATUS_OT_FAULT)
 186                         ret |= PB_TEMP_OT_FAULT;
 187                 break;
 188         default:
 189                 ret = -ENODATA;
 190                 break;
 191         }
 192         return ret;
 193 }
 194
 195 static int max34451_set_supported_funcs(struct i2c_client *client,
 196                                          struct max34440_data *data)
 197 {
 198         /*
 199          * Each of the channel 0-15 can be configured to monitor the following
 200          * functions based on MFR_CHANNEL_CONFIG[5:0]
 201          * 0x10: Sequencing + voltage monitoring (only valid for PAGES 0–11)
 202          * 0x20: Voltage monitoring (no sequencing)
 203          * 0x21: Voltage read only
 204          * 0x22: Current monitoring
 205          * 0x23: Current read only
 206          * 0x30: General-purpose input active low
 207          * 0x34: General-purpose input active high
 208          * 0x00:  Disabled
 209          */
 210
 211         int page, rv;
 212
 213         for (page = 0; page < 16; page++) {
 214                 rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
 215                 if (rv < 0)
 216                         return rv;
 217
 218                 rv = i2c_smbus_read_word_data(client,
 219                                               MAX34451_MFR_CHANNEL_CONFIG);
 220                 if (rv < 0)
 221                         return rv;
 222
 223                 switch (rv & MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK) {
 224                 case 0x10:
 225                 case 0x20:
 226                         data->info.func[page] = PMBUS_HAVE_VOUT |
 227                                 PMBUS_HAVE_STATUS_VOUT;
 228                         break;
 229                 case 0x21:
 230                         data->info.func[page] = PMBUS_HAVE_VOUT;
 231                         break;
 232                 case 0x22:
 233                         data->info.func[page] = PMBUS_HAVE_IOUT |
 234                                 PMBUS_HAVE_STATUS_IOUT;
 235                         break;
 236                 case 0x23:
 237                         data->info.func[page] = PMBUS_HAVE_IOUT;
 238                         break;
 239                 default:
 240                         break;
 241                 }
 242         }
 243
 244         return 0;
 245 }
 246
 247 static struct pmbus_driver_info max34440_info[] = {
 248         [max34440] = {
 249                 .pages = 14,
 250                 .format[PSC_VOLTAGE_IN] = direct,
 251                 .format[PSC_VOLTAGE_OUT] = direct,
 252                 .format[PSC_TEMPERATURE] = direct,
 253                 .format[PSC_CURRENT_OUT] = direct,
 254                 .m[PSC_VOLTAGE_IN] = 1,
 255                 .b[PSC_VOLTAGE_IN] = 0,
 256                 .R[PSC_VOLTAGE_IN] = 3,     /* R = 0 in datasheet reflects mV */
 257                 .m[PSC_VOLTAGE_OUT] = 1,
 258                 .b[PSC_VOLTAGE_OUT] = 0,
 259                 .R[PSC_VOLTAGE_OUT] = 3,    /* R = 0 in datasheet reflects mV */
 260                 .m[PSC_CURRENT_OUT] = 1,
 261                 .b[PSC_CURRENT_OUT] = 0,
 262                 .R[PSC_CURRENT_OUT] = 3,    /* R = 0 in datasheet reflects mA */
 263                 .m[PSC_TEMPERATURE] = 1,
 264                 .b[PSC_TEMPERATURE] = 0,
 265                 .R[PSC_TEMPERATURE] = 2,
 266                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 267                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 268                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 269                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 270                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 271                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 272                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 273                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 274                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 275                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 276                 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 277                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 278                 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 279                 .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 280                 .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 281                 .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 282                 .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 283                 .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 284                 .func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 285                 .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 286                 .read_byte_data = max34440_read_byte_data,
 287                 .read_word_data = max34440_read_word_data,
 288                 .write_word_data = max34440_write_word_data,
 289         },
 290         [max34441] = {
 291                 .pages = 12,
 292                 .format[PSC_VOLTAGE_IN] = direct,
 293                 .format[PSC_VOLTAGE_OUT] = direct,
 294                 .format[PSC_TEMPERATURE] = direct,
 295                 .format[PSC_CURRENT_OUT] = direct,
 296                 .format[PSC_FAN] = direct,
 297                 .m[PSC_VOLTAGE_IN] = 1,
 298                 .b[PSC_VOLTAGE_IN] = 0,
 299                 .R[PSC_VOLTAGE_IN] = 3,
 300                 .m[PSC_VOLTAGE_OUT] = 1,
 301                 .b[PSC_VOLTAGE_OUT] = 0,
 302                 .R[PSC_VOLTAGE_OUT] = 3,
 303                 .m[PSC_CURRENT_OUT] = 1,
 304                 .b[PSC_CURRENT_OUT] = 0,
 305                 .R[PSC_CURRENT_OUT] = 3,
 306                 .m[PSC_TEMPERATURE] = 1,
 307                 .b[PSC_TEMPERATURE] = 0,
 308                 .R[PSC_TEMPERATURE] = 2,
 309                 .m[PSC_FAN] = 1,
 310                 .b[PSC_FAN] = 0,
 311                 .R[PSC_FAN] = 0,
 312                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 313                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 314                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 315                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 316                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 317                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 318                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 319                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 320                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 321                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 322                 .func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
 323                 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 324                 .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 325                 .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 326                 .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 327                 .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 328                 .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 329                 .read_byte_data = max34440_read_byte_data,
 330                 .read_word_data = max34440_read_word_data,
 331                 .write_word_data = max34440_write_word_data,
 332         },
 333         [max34446] = {
 334                 .pages = 7,
 335                 .format[PSC_VOLTAGE_IN] = direct,
 336                 .format[PSC_VOLTAGE_OUT] = direct,
 337                 .format[PSC_TEMPERATURE] = direct,
 338                 .format[PSC_CURRENT_OUT] = direct,
 339                 .format[PSC_POWER] = direct,
 340                 .m[PSC_VOLTAGE_IN] = 1,
 341                 .b[PSC_VOLTAGE_IN] = 0,
 342                 .R[PSC_VOLTAGE_IN] = 3,
 343                 .m[PSC_VOLTAGE_OUT] = 1,
 344                 .b[PSC_VOLTAGE_OUT] = 0,
 345                 .R[PSC_VOLTAGE_OUT] = 3,
 346                 .m[PSC_CURRENT_OUT] = 1,
 347                 .b[PSC_CURRENT_OUT] = 0,
 348                 .R[PSC_CURRENT_OUT] = 3,
 349                 .m[PSC_POWER] = 1,
 350                 .b[PSC_POWER] = 0,
 351                 .R[PSC_POWER] = 3,
 352                 .m[PSC_TEMPERATURE] = 1,
 353                 .b[PSC_TEMPERATURE] = 0,
 354                 .R[PSC_TEMPERATURE] = 2,
 355                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 356                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
 357                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 358                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 359                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 360                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
 361                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 362                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 363                 .func[4] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 364                 .func[5] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 365                 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 366                 .read_byte_data = max34440_read_byte_data,
 367                 .read_word_data = max34440_read_word_data,
 368                 .write_word_data = max34440_write_word_data,
 369         },
 370         [max34451] = {
 371                 .pages = 21,
 372                 .format[PSC_VOLTAGE_OUT] = direct,
 373                 .format[PSC_TEMPERATURE] = direct,
 374                 .format[PSC_CURRENT_OUT] = direct,
 375                 .m[PSC_VOLTAGE_OUT] = 1,
 376                 .b[PSC_VOLTAGE_OUT] = 0,
 377                 .R[PSC_VOLTAGE_OUT] = 3,
 378                 .m[PSC_CURRENT_OUT] = 1,
 379                 .b[PSC_CURRENT_OUT] = 0,
 380                 .R[PSC_CURRENT_OUT] = 2,
 381                 .m[PSC_TEMPERATURE] = 1,
 382                 .b[PSC_TEMPERATURE] = 0,
 383                 .R[PSC_TEMPERATURE] = 2,
 384                 /* func 0-15 is set dynamically before probing */
 385                 .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 386                 .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 387                 .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 388                 .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 389                 .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 390                 .read_byte_data = max34440_read_byte_data,
 391                 .read_word_data = max34440_read_word_data,
 392                 .write_word_data = max34440_write_word_data,
 393         },
 394         [max34460] = {
 395                 .pages = 18,
 396                 .format[PSC_VOLTAGE_OUT] = direct,
 397                 .format[PSC_TEMPERATURE] = direct,
 398                 .m[PSC_VOLTAGE_OUT] = 1,
 399                 .b[PSC_VOLTAGE_OUT] = 0,
 400                 .R[PSC_VOLTAGE_OUT] = 3,
 401                 .m[PSC_TEMPERATURE] = 1,
 402                 .b[PSC_TEMPERATURE] = 0,
 403                 .R[PSC_TEMPERATURE] = 2,
 404                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 405                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 406                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 407                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 408                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 409                 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 410                 .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 411                 .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 412                 .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 413                 .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 414                 .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 415                 .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 416                 .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 417                 .func[14] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 418                 .func[15] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 419                 .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 420                 .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 421                 .read_byte_data = max34440_read_byte_data,
 422                 .read_word_data = max34440_read_word_data,
 423                 .write_word_data = max34440_write_word_data,
 424         },
 425         [max34461] = {
 426                 .pages = 23,
 427                 .format[PSC_VOLTAGE_OUT] = direct,
 428                 .format[PSC_TEMPERATURE] = direct,
 429                 .m[PSC_VOLTAGE_OUT] = 1,
 430                 .b[PSC_VOLTAGE_OUT] = 0,
 431                 .R[PSC_VOLTAGE_OUT] = 3,
 432                 .m[PSC_TEMPERATURE] = 1,
 433                 .b[PSC_TEMPERATURE] = 0,
 434                 .R[PSC_TEMPERATURE] = 2,
 435                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 436                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 437                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 438                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 439                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 440                 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 441                 .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 442                 .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 443                 .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 444                 .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 445                 .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 446                 .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 447                 .func[12] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 448                 .func[13] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 449                 .func[14] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 450                 .func[15] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 451                 /* page 16 is reserved */
 452                 .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 453                 .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 454                 .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 455                 .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 456                 .func[21] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 457                 .read_byte_data = max34440_read_byte_data,
 458                 .read_word_data = max34440_read_word_data,
 459                 .write_word_data = max34440_write_word_data,
 460         },
 461 };
 462
 463 static int max34440_probe(struct i2c_client *client,
 464                           const struct i2c_device_id *id)
 465 {
 466         struct max34440_data *data;
 467         int rv;
 468
 469         data = devm_kzalloc(&client->dev, sizeof(struct max34440_data),
 470                             GFP_KERNEL);
 471         if (!data)
 472                 return -ENOMEM;
 473         data->id = id->driver_data;
 474         data->info = max34440_info[id->driver_data];
 475
 476         if (data->id == max34451) {
 477                 rv = max34451_set_supported_funcs(client, data);
 478                 if (rv)
 479                         return rv;
 480         }
 481
 482         return pmbus_do_probe(client, id, &data->info);
 483 }
 484
 485 static const struct i2c_device_id max34440_id[] = {
 486         {"max34440", max34440},
 487         {"max34441", max34441},
 488         {"max34446", max34446},
 489         {"max34451", max34451},
 490         {"max34460", max34460},
 491         {"max34461", max34461},
 492         {}
 493 };
 494 MODULE_DEVICE_TABLE(i2c, max34440_id);
 495
 496 /* This is the driver that will be inserted */
 497 static struct i2c_driver max34440_driver = {
 498         .driver = {
 499                    .name = "max34440",
 500                    },
 501         .probe = max34440_probe,
 502         .remove = pmbus_do_remove,
 503         .id_table = max34440_id,
 504 };
 505
 506 module_i2c_driver(max34440_driver);
 507
 508 MODULE_AUTHOR("Guenter Roeck");
 509 MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
 510 MODULE_LICENSE("GPL");