drivers/hwmon/pmbus/max34440.c

   1 /*
   2  * Hardware monitoring driver for Maxim MAX34440/MAX34441
   3  *
   4  * Copyright (c) 2011 Ericsson AB.
   5  * Copyright (c) 2012 Guenter Roeck
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/bitops.h>
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/err.h>
  27 #include <linux/i2c.h>
  28 #include "pmbus.h"
  29
  30 enum chips { max34440, max34441, max34446, max34451, max34460, max34461 };
  31
  32 #define MAX34440_MFR_VOUT_PEAK          0xd4
  33 #define MAX34440_MFR_IOUT_PEAK          0xd5
  34 #define MAX34440_MFR_TEMPERATURE_PEAK   0xd6
  35 #define MAX34440_MFR_VOUT_MIN           0xd7
  36
  37 #define MAX34446_MFR_POUT_PEAK          0xe0
  38 #define MAX34446_MFR_POUT_AVG           0xe1
  39 #define MAX34446_MFR_IOUT_AVG           0xe2
  40 #define MAX34446_MFR_TEMPERATURE_AVG    0xe3
  41
  42 #define MAX34440_STATUS_OC_WARN         BIT(0)
  43 #define MAX34440_STATUS_OC_FAULT        BIT(1)
  44 #define MAX34440_STATUS_OT_FAULT        BIT(5)
  45 #define MAX34440_STATUS_OT_WARN         BIT(6)
  46
  47 #define MAX34451_MFR_CHANNEL_CONFIG     0xe4
  48 #define MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK    0x3f
  49
  50 struct max34440_data {
  51         int id;
  52         struct pmbus_driver_info info;
  53 };
  54
  55 #define to_max34440_data(x)  container_of(x, struct max34440_data, info)
  56
  57 static int max34440_read_word_data(struct i2c_client *client, int page, int reg)
  58 {
  59         int ret;
  60         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
  61         const struct max34440_data *data = to_max34440_data(info);
  62
  63         switch (reg) {
  64         case PMBUS_VIRT_READ_VOUT_MIN:
  65                 ret = pmbus_read_word_data(client, page,
  66                                            MAX34440_MFR_VOUT_MIN);
  67                 break;
  68         case PMBUS_VIRT_READ_VOUT_MAX:
  69                 ret = pmbus_read_word_data(client, page,
  70                                            MAX34440_MFR_VOUT_PEAK);
  71                 break;
  72         case PMBUS_VIRT_READ_IOUT_AVG:
  73                 if (data->id != max34446 && data->id != max34451)
  74                         return -ENXIO;
  75                 ret = pmbus_read_word_data(client, page,
  76                                            MAX34446_MFR_IOUT_AVG);
  77                 break;
  78         case PMBUS_VIRT_READ_IOUT_MAX:
  79                 ret = pmbus_read_word_data(client, page,
  80                                            MAX34440_MFR_IOUT_PEAK);
  81                 break;
  82         case PMBUS_VIRT_READ_POUT_AVG:
  83                 if (data->id != max34446)
  84                         return -ENXIO;
  85                 ret = pmbus_read_word_data(client, page,
  86                                            MAX34446_MFR_POUT_AVG);
  87                 break;
  88         case PMBUS_VIRT_READ_POUT_MAX:
  89                 if (data->id != max34446)
  90                         return -ENXIO;
  91                 ret = pmbus_read_word_data(client, page,
  92                                            MAX34446_MFR_POUT_PEAK);
  93                 break;
  94         case PMBUS_VIRT_READ_TEMP_AVG:
  95                 if (data->id != max34446 && data->id != max34460 &&
  96                     data->id != max34461)
  97                         return -ENXIO;
  98                 ret = pmbus_read_word_data(client, page,
  99                                            MAX34446_MFR_TEMPERATURE_AVG);
 100                 break;
 101         case PMBUS_VIRT_READ_TEMP_MAX:
 102                 ret = pmbus_read_word_data(client, page,
 103                                            MAX34440_MFR_TEMPERATURE_PEAK);
 104                 break;
 105         case PMBUS_VIRT_RESET_POUT_HISTORY:
 106                 if (data->id != max34446)
 107                         return -ENXIO;
 108                 ret = 0;
 109                 break;
 110         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 111         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 112         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 113                 ret = 0;
 114                 break;
 115         default:
 116                 ret = -ENODATA;
 117                 break;
 118         }
 119         return ret;
 120 }
 121
 122 static int max34440_write_word_data(struct i2c_client *client, int page,
 123                                     int reg, u16 word)
 124 {
 125         const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
 126         const struct max34440_data *data = to_max34440_data(info);
 127         int ret;
 128
 129         switch (reg) {
 130         case PMBUS_VIRT_RESET_POUT_HISTORY:
 131                 ret = pmbus_write_word_data(client, page,
 132                                             MAX34446_MFR_POUT_PEAK, 0);
 133                 if (ret)
 134                         break;
 135                 ret = pmbus_write_word_data(client, page,
 136                                             MAX34446_MFR_POUT_AVG, 0);
 137                 break;
 138         case PMBUS_VIRT_RESET_VOUT_HISTORY:
 139                 ret = pmbus_write_word_data(client, page,
 140                                             MAX34440_MFR_VOUT_MIN, 0x7fff);
 141                 if (ret)
 142                         break;
 143                 ret = pmbus_write_word_data(client, page,
 144                                             MAX34440_MFR_VOUT_PEAK, 0);
 145                 break;
 146         case PMBUS_VIRT_RESET_IOUT_HISTORY:
 147                 ret = pmbus_write_word_data(client, page,
 148                                             MAX34440_MFR_IOUT_PEAK, 0);
 149                 if (!ret && (data->id == max34446 || data->id == max34451))
 150                         ret = pmbus_write_word_data(client, page,
 151                                         MAX34446_MFR_IOUT_AVG, 0);
 152
 153                 break;
 154         case PMBUS_VIRT_RESET_TEMP_HISTORY:
 155                 ret = pmbus_write_word_data(client, page,
 156                                             MAX34440_MFR_TEMPERATURE_PEAK,
 157                                             0x8000);
 158                 if (!ret && data->id == max34446)
 159                         ret = pmbus_write_word_data(client, page,
 160                                         MAX34446_MFR_TEMPERATURE_AVG, 0);
 161                 break;
 162         default:
 163                 ret = -ENODATA;
 164                 break;
 165         }
 166         return ret;
 167 }
 168
 169 static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)
 170 {
 171         int ret = 0;
 172         int mfg_status;
 173
 174         if (page >= 0) {
 175                 ret = pmbus_set_page(client, page);
 176                 if (ret < 0)
 177                         return ret;
 178         }
 179
 180         switch (reg) {
 181         case PMBUS_STATUS_IOUT:
 182                 mfg_status = pmbus_read_word_data(client, 0,
 183                                                   PMBUS_STATUS_MFR_SPECIFIC);
 184                 if (mfg_status < 0)
 185                         return mfg_status;
 186                 if (mfg_status & MAX34440_STATUS_OC_WARN)
 187                         ret |= PB_IOUT_OC_WARNING;
 188                 if (mfg_status & MAX34440_STATUS_OC_FAULT)
 189                         ret |= PB_IOUT_OC_FAULT;
 190                 break;
 191         case PMBUS_STATUS_TEMPERATURE:
 192                 mfg_status = pmbus_read_word_data(client, 0,
 193                                                   PMBUS_STATUS_MFR_SPECIFIC);
 194                 if (mfg_status < 0)
 195                         return mfg_status;
 196                 if (mfg_status & MAX34440_STATUS_OT_WARN)
 197                         ret |= PB_TEMP_OT_WARNING;
 198                 if (mfg_status & MAX34440_STATUS_OT_FAULT)
 199                         ret |= PB_TEMP_OT_FAULT;
 200                 break;
 201         default:
 202                 ret = -ENODATA;
 203                 break;
 204         }
 205         return ret;
 206 }
 207
 208 static int max34451_set_supported_funcs(struct i2c_client *client,
 209                                          struct max34440_data *data)
 210 {
 211         /*
 212          * Each of the channel 0-15 can be configured to monitor the following
 213          * functions based on MFR_CHANNEL_CONFIG[5:0]
 214          * 0x10: Sequencing + voltage monitoring (only valid for PAGES 0–11)
 215          * 0x20: Voltage monitoring (no sequencing)
 216          * 0x21: Voltage read only
 217          * 0x22: Current monitoring
 218          * 0x23: Current read only
 219          * 0x30: General-purpose input active low
 220          * 0x34: General-purpose input active high
 221          * 0x00:  Disabled
 222          */
 223
 224         int page, rv;
 225
 226         for (page = 0; page < 16; page++) {
 227                 rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
 228                 if (rv < 0)
 229                         return rv;
 230
 231                 rv = i2c_smbus_read_word_data(client,
 232                                               MAX34451_MFR_CHANNEL_CONFIG);
 233                 if (rv < 0)
 234                         return rv;
 235
 236                 switch (rv & MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK) {
 237                 case 0x10:
 238                 case 0x20:
 239                         data->info.func[page] = PMBUS_HAVE_VOUT |
 240                                 PMBUS_HAVE_STATUS_VOUT;
 241                         break;
 242                 case 0x21:
 243                         data->info.func[page] = PMBUS_HAVE_VOUT;
 244                         break;
 245                 case 0x22:
 246                         data->info.func[page] = PMBUS_HAVE_IOUT |
 247                                 PMBUS_HAVE_STATUS_IOUT;
 248                         break;
 249                 case 0x23:
 250                         data->info.func[page] = PMBUS_HAVE_IOUT;
 251                         break;
 252                 default:
 253                         break;
 254                 }
 255         }
 256
 257         return 0;
 258 }
 259
 260 static struct pmbus_driver_info max34440_info[] = {
 261         [max34440] = {
 262                 .pages = 14,
 263                 .format[PSC_VOLTAGE_IN] = direct,
 264                 .format[PSC_VOLTAGE_OUT] = direct,
 265                 .format[PSC_TEMPERATURE] = direct,
 266                 .format[PSC_CURRENT_OUT] = direct,
 267                 .m[PSC_VOLTAGE_IN] = 1,
 268                 .b[PSC_VOLTAGE_IN] = 0,
 269                 .R[PSC_VOLTAGE_IN] = 3,     /* R = 0 in datasheet reflects mV */
 270                 .m[PSC_VOLTAGE_OUT] = 1,
 271                 .b[PSC_VOLTAGE_OUT] = 0,
 272                 .R[PSC_VOLTAGE_OUT] = 3,    /* R = 0 in datasheet reflects mV */
 273                 .m[PSC_CURRENT_OUT] = 1,
 274                 .b[PSC_CURRENT_OUT] = 0,
 275                 .R[PSC_CURRENT_OUT] = 3,    /* R = 0 in datasheet reflects mA */
 276                 .m[PSC_TEMPERATURE] = 1,
 277                 .b[PSC_TEMPERATURE] = 0,
 278                 .R[PSC_TEMPERATURE] = 2,
 279                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 280                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 281                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 282                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 283                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 284                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 285                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 286                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 287                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 288                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 289                 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 290                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 291                 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 292                 .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 293                 .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 294                 .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 295                 .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 296                 .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 297                 .func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 298                 .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 299                 .read_byte_data = max34440_read_byte_data,
 300                 .read_word_data = max34440_read_word_data,
 301                 .write_word_data = max34440_write_word_data,
 302         },
 303         [max34441] = {
 304                 .pages = 12,
 305                 .format[PSC_VOLTAGE_IN] = direct,
 306                 .format[PSC_VOLTAGE_OUT] = direct,
 307                 .format[PSC_TEMPERATURE] = direct,
 308                 .format[PSC_CURRENT_OUT] = direct,
 309                 .format[PSC_FAN] = direct,
 310                 .m[PSC_VOLTAGE_IN] = 1,
 311                 .b[PSC_VOLTAGE_IN] = 0,
 312                 .R[PSC_VOLTAGE_IN] = 3,
 313                 .m[PSC_VOLTAGE_OUT] = 1,
 314                 .b[PSC_VOLTAGE_OUT] = 0,
 315                 .R[PSC_VOLTAGE_OUT] = 3,
 316                 .m[PSC_CURRENT_OUT] = 1,
 317                 .b[PSC_CURRENT_OUT] = 0,
 318                 .R[PSC_CURRENT_OUT] = 3,
 319                 .m[PSC_TEMPERATURE] = 1,
 320                 .b[PSC_TEMPERATURE] = 0,
 321                 .R[PSC_TEMPERATURE] = 2,
 322                 .m[PSC_FAN] = 1,
 323                 .b[PSC_FAN] = 0,
 324                 .R[PSC_FAN] = 0,
 325                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 326                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 327                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 328                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 329                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 330                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 331                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 332                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 333                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 334                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 335                 .func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
 336                 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 337                 .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 338                 .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 339                 .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 340                 .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 341                 .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 342                 .read_byte_data = max34440_read_byte_data,
 343                 .read_word_data = max34440_read_word_data,
 344                 .write_word_data = max34440_write_word_data,
 345         },
 346         [max34446] = {
 347                 .pages = 7,
 348                 .format[PSC_VOLTAGE_IN] = direct,
 349                 .format[PSC_VOLTAGE_OUT] = direct,
 350                 .format[PSC_TEMPERATURE] = direct,
 351                 .format[PSC_CURRENT_OUT] = direct,
 352                 .format[PSC_POWER] = direct,
 353                 .m[PSC_VOLTAGE_IN] = 1,
 354                 .b[PSC_VOLTAGE_IN] = 0,
 355                 .R[PSC_VOLTAGE_IN] = 3,
 356                 .m[PSC_VOLTAGE_OUT] = 1,
 357                 .b[PSC_VOLTAGE_OUT] = 0,
 358                 .R[PSC_VOLTAGE_OUT] = 3,
 359                 .m[PSC_CURRENT_OUT] = 1,
 360                 .b[PSC_CURRENT_OUT] = 0,
 361                 .R[PSC_CURRENT_OUT] = 3,
 362                 .m[PSC_POWER] = 1,
 363                 .b[PSC_POWER] = 0,
 364                 .R[PSC_POWER] = 3,
 365                 .m[PSC_TEMPERATURE] = 1,
 366                 .b[PSC_TEMPERATURE] = 0,
 367                 .R[PSC_TEMPERATURE] = 2,
 368                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 369                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
 370                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 371                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 372                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 373                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
 374                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
 375                   | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
 376                 .func[4] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 377                 .func[5] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 378                 .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 379                 .read_byte_data = max34440_read_byte_data,
 380                 .read_word_data = max34440_read_word_data,
 381                 .write_word_data = max34440_write_word_data,
 382         },
 383         [max34451] = {
 384                 .pages = 21,
 385                 .format[PSC_VOLTAGE_OUT] = direct,
 386                 .format[PSC_TEMPERATURE] = direct,
 387                 .format[PSC_CURRENT_OUT] = direct,
 388                 .m[PSC_VOLTAGE_OUT] = 1,
 389                 .b[PSC_VOLTAGE_OUT] = 0,
 390                 .R[PSC_VOLTAGE_OUT] = 3,
 391                 .m[PSC_CURRENT_OUT] = 1,
 392                 .b[PSC_CURRENT_OUT] = 0,
 393                 .R[PSC_CURRENT_OUT] = 2,
 394                 .m[PSC_TEMPERATURE] = 1,
 395                 .b[PSC_TEMPERATURE] = 0,
 396                 .R[PSC_TEMPERATURE] = 2,
 397                 /* func 0-15 is set dynamically before probing */
 398                 .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 399                 .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 400                 .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 401                 .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 402                 .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 403                 .read_word_data = max34440_read_word_data,
 404                 .write_word_data = max34440_write_word_data,
 405         },
 406         [max34460] = {
 407                 .pages = 18,
 408                 .format[PSC_VOLTAGE_OUT] = direct,
 409                 .format[PSC_TEMPERATURE] = direct,
 410                 .m[PSC_VOLTAGE_OUT] = 1,
 411                 .b[PSC_VOLTAGE_OUT] = 0,
 412                 .R[PSC_VOLTAGE_OUT] = 3,
 413                 .m[PSC_TEMPERATURE] = 1,
 414                 .b[PSC_TEMPERATURE] = 0,
 415                 .R[PSC_TEMPERATURE] = 2,
 416                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 417                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 418                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 419                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 420                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 421                 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 422                 .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 423                 .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 424                 .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 425                 .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 426                 .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 427                 .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 428                 .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 429                 .func[14] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 430                 .func[15] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 431                 .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 432                 .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 433                 .read_word_data = max34440_read_word_data,
 434                 .write_word_data = max34440_write_word_data,
 435         },
 436         [max34461] = {
 437                 .pages = 23,
 438                 .format[PSC_VOLTAGE_OUT] = direct,
 439                 .format[PSC_TEMPERATURE] = direct,
 440                 .m[PSC_VOLTAGE_OUT] = 1,
 441                 .b[PSC_VOLTAGE_OUT] = 0,
 442                 .R[PSC_VOLTAGE_OUT] = 3,
 443                 .m[PSC_TEMPERATURE] = 1,
 444                 .b[PSC_TEMPERATURE] = 0,
 445                 .R[PSC_TEMPERATURE] = 2,
 446                 .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 447                 .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 448                 .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 449                 .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 450                 .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 451                 .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 452                 .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 453                 .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 454                 .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 455                 .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 456                 .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 457                 .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 458                 .func[12] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 459                 .func[13] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 460                 .func[14] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 461                 .func[15] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
 462                 /* page 16 is reserved */
 463                 .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 464                 .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 465                 .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 466                 .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 467                 .func[21] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
 468                 .read_word_data = max34440_read_word_data,
 469                 .write_word_data = max34440_write_word_data,
 470         },
 471 };
 472
 473 static int max34440_probe(struct i2c_client *client,
 474                           const struct i2c_device_id *id)
 475 {
 476         struct max34440_data *data;
 477         int rv;
 478
 479         data = devm_kzalloc(&client->dev, sizeof(struct max34440_data),
 480                             GFP_KERNEL);
 481         if (!data)
 482                 return -ENOMEM;
 483         data->id = id->driver_data;
 484         data->info = max34440_info[id->driver_data];
 485
 486         if (data->id == max34451) {
 487                 rv = max34451_set_supported_funcs(client, data);
 488                 if (rv)
 489                         return rv;
 490         }
 491
 492         return pmbus_do_probe(client, id, &data->info);
 493 }
 494
 495 static const struct i2c_device_id max34440_id[] = {
 496         {"max34440", max34440},
 497         {"max34441", max34441},
 498         {"max34446", max34446},
 499         {"max34451", max34451},
 500         {"max34460", max34460},
 501         {"max34461", max34461},
 502         {}
 503 };
 504 MODULE_DEVICE_TABLE(i2c, max34440_id);
 505
 506 /* This is the driver that will be inserted */
 507 static struct i2c_driver max34440_driver = {
 508         .driver = {
 509                    .name = "max34440",
 510                    },
 511         .probe = max34440_probe,
 512         .remove = pmbus_do_remove,
 513         .id_table = max34440_id,
 514 };
 515
 516 module_i2c_driver(max34440_driver);
 517
 518 MODULE_AUTHOR("Guenter Roeck");
 519 MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
 520 MODULE_LICENSE("GPL");