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