drivers/hwmon/max6697.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
   4  *
   5  * based on max1668.c
   6  * Copyright (c) 2011 David George <david.george@ska.ac.za>
   7  */
   8
   9 #include <linux/bitfield.h>
  10 #include <linux/bits.h>
  11 #include <linux/err.h>
  12 #include <linux/hwmon.h>
  13 #include <linux/i2c.h>
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16 #include <linux/mutex.h>
  17 #include <linux/of.h>
  18 #include <linux/regmap.h>
  19 #include <linux/slab.h>
  20
  21 enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
  22              max6697, max6698, max6699 };
  23
  24 /* Report local sensor as temp1 */
  25
  26 static const u8 MAX6697_REG_TEMP[] = {
  27                         0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 };
  28 static const u8 MAX6697_REG_TEMP_EXT[] = {
  29                         0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
  30 static const u8 MAX6697_REG_MAX[] = {
  31                         0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
  32 static const u8 MAX6697_REG_CRIT[] = {
  33                         0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
  34
  35 #define MAX6697_REG_MIN                 0x30
  36 /*
  37  * Map device tree / internal register bit map to chip bit map.
  38  * Applies to alert register and over-temperature register.
  39  */
  40
  41 #define MAX6697_EXTERNAL_MASK_DT        GENMASK(7, 1)
  42 #define MAX6697_LOCAL_MASK_DT           BIT(0)
  43 #define MAX6697_EXTERNAL_MASK_CHIP      GENMASK(6, 0)
  44 #define MAX6697_LOCAL_MASK_CHIP         BIT(7)
  45
  46 /* alert - local channel is in bit 6 */
  47 #define MAX6697_ALERT_MAP_BITS(reg)     ((((reg) & 0x7e) >> 1) | \
  48                                  (((reg) & 0x01) << 6) | ((reg) & 0x80))
  49
  50 /* over-temperature - local channel is in bit 7 */
  51 #define MAX6697_OVERT_MAP_BITS(reg)     \
  52         (FIELD_PREP(MAX6697_EXTERNAL_MASK_CHIP, FIELD_GET(MAX6697_EXTERNAL_MASK_DT, reg)) | \
  53          FIELD_PREP(MAX6697_LOCAL_MASK_CHIP, FIELD_GET(MAX6697_LOCAL_MASK_DT, reg)))
  54
  55 #define MAX6697_REG_STAT_ALARM          0x44
  56 #define MAX6697_REG_STAT_CRIT           0x45
  57 #define MAX6697_REG_STAT_FAULT          0x46
  58 #define MAX6697_REG_STAT_MIN_ALARM      0x47
  59
  60 #define MAX6697_REG_CONFIG              0x41
  61 #define MAX6581_CONF_EXTENDED           BIT(1)
  62 #define MAX6693_CONF_BETA               BIT(2)
  63 #define MAX6697_CONF_RESISTANCE         BIT(3)
  64 #define MAX6697_CONF_TIMEOUT            BIT(5)
  65 #define MAX6697_REG_ALERT_MASK          0x42
  66 #define MAX6697_REG_OVERT_MASK          0x43
  67
  68 #define MAX6581_REG_RESISTANCE          0x4a
  69 #define MAX6581_REG_IDEALITY            0x4b
  70 #define MAX6581_REG_IDEALITY_SELECT     0x4c
  71 #define MAX6581_REG_OFFSET              0x4d
  72 #define MAX6581_REG_OFFSET_SELECT       0x4e
  73 #define MAX6581_OFFSET_MIN              -31750
  74 #define MAX6581_OFFSET_MAX              31750
  75
  76 #define MAX6697_CONV_TIME               156     /* ms per channel, worst case */
  77
  78 struct max6697_chip_data {
  79         int channels;
  80         u32 have_ext;
  81         u32 have_crit;
  82         u32 have_fault;
  83         u8 valid_conf;
  84 };
  85
  86 struct max6697_data {
  87         struct regmap *regmap;
  88
  89         enum chips type;
  90         const struct max6697_chip_data *chip;
  91
  92         int temp_offset;        /* in degrees C */
  93
  94         struct mutex update_lock;
  95
  96 #define MAX6697_TEMP_INPUT      0
  97 #define MAX6697_TEMP_EXT        1
  98 #define MAX6697_TEMP_MAX        2
  99 #define MAX6697_TEMP_CRIT       3
 100         u32 alarms;
 101 };
 102
 103 static const struct max6697_chip_data max6697_chip_data[] = {
 104         [max6581] = {
 105                 .channels = 8,
 106                 .have_crit = 0xff,
 107                 .have_ext = 0x7f,
 108                 .have_fault = 0xfe,
 109                 .valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT,
 110         },
 111         [max6602] = {
 112                 .channels = 5,
 113                 .have_crit = 0x12,
 114                 .have_ext = 0x02,
 115                 .have_fault = 0x1e,
 116                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 117         },
 118         [max6622] = {
 119                 .channels = 5,
 120                 .have_crit = 0x12,
 121                 .have_ext = 0x02,
 122                 .have_fault = 0x1e,
 123                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 124         },
 125         [max6636] = {
 126                 .channels = 7,
 127                 .have_crit = 0x72,
 128                 .have_ext = 0x02,
 129                 .have_fault = 0x7e,
 130                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 131         },
 132         [max6689] = {
 133                 .channels = 7,
 134                 .have_crit = 0x72,
 135                 .have_ext = 0x02,
 136                 .have_fault = 0x7e,
 137                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 138         },
 139         [max6693] = {
 140                 .channels = 7,
 141                 .have_crit = 0x72,
 142                 .have_ext = 0x02,
 143                 .have_fault = 0x7e,
 144                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
 145                   MAX6697_CONF_TIMEOUT,
 146         },
 147         [max6694] = {
 148                 .channels = 5,
 149                 .have_crit = 0x12,
 150                 .have_ext = 0x02,
 151                 .have_fault = 0x1e,
 152                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
 153                   MAX6697_CONF_TIMEOUT,
 154         },
 155         [max6697] = {
 156                 .channels = 7,
 157                 .have_crit = 0x72,
 158                 .have_ext = 0x02,
 159                 .have_fault = 0x7e,
 160                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 161         },
 162         [max6698] = {
 163                 .channels = 7,
 164                 .have_crit = 0x72,
 165                 .have_ext = 0x02,
 166                 .have_fault = 0x0e,
 167                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 168         },
 169         [max6699] = {
 170                 .channels = 5,
 171                 .have_crit = 0x12,
 172                 .have_ext = 0x02,
 173                 .have_fault = 0x1e,
 174                 .valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
 175         },
 176 };
 177
 178 static int max6697_alarm_channel_map(int channel)
 179 {
 180         switch (channel) {
 181         case 0:
 182                 return 6;
 183         case 7:
 184                 return 7;
 185         default:
 186                 return channel - 1;
 187         }
 188 }
 189
 190 static int max6697_read(struct device *dev, enum hwmon_sensor_types type,
 191                         u32 attr, int channel, long *val)
 192 {
 193         unsigned int offset_regs[2] = { MAX6581_REG_OFFSET_SELECT, MAX6581_REG_OFFSET };
 194         unsigned int temp_regs[2] = { MAX6697_REG_TEMP[channel],
 195                                       MAX6697_REG_TEMP_EXT[channel] };
 196         struct max6697_data *data = dev_get_drvdata(dev);
 197         struct regmap *regmap = data->regmap;
 198         u8 regdata[2] = { };
 199         u32 regval;
 200         int ret;
 201
 202         switch (attr) {
 203         case hwmon_temp_input:
 204                 ret = regmap_multi_reg_read(regmap, temp_regs, regdata,
 205                                             data->chip->have_ext & BIT(channel) ? 2 : 1);
 206                 if (ret)
 207                         return ret;
 208                 *val = (((regdata[0] - data->temp_offset) << 3) | (regdata[1] >> 5)) * 125;
 209                 break;
 210         case hwmon_temp_max:
 211                 ret = regmap_read(regmap, MAX6697_REG_MAX[channel], &regval);
 212                 if (ret)
 213                         return ret;
 214                 *val = ((int)regval - data->temp_offset) * 1000;
 215                 break;
 216         case hwmon_temp_crit:
 217                 ret = regmap_read(regmap, MAX6697_REG_CRIT[channel], &regval);
 218                 if (ret)
 219                         return ret;
 220                 *val = ((int)regval - data->temp_offset) * 1000;
 221                 break;
 222         case hwmon_temp_min:
 223                 ret = regmap_read(regmap, MAX6697_REG_MIN, &regval);
 224                 if (ret)
 225                         return ret;
 226                 *val = ((int)regval - data->temp_offset) * 1000;
 227                 break;
 228         case hwmon_temp_offset:
 229                 ret = regmap_multi_reg_read(regmap, offset_regs, regdata, 2);
 230                 if (ret)
 231                         return ret;
 232
 233                 if (!(regdata[0] & BIT(channel - 1)))
 234                         regdata[1] = 0;
 235
 236                 *val = sign_extend32(regdata[1], 7) * 250;
 237                 break;
 238         case hwmon_temp_fault:
 239                 ret = regmap_read(regmap, MAX6697_REG_STAT_FAULT, &regval);
 240                 if (ret)
 241                         return ret;
 242                 if (data->type == max6581)
 243                         *val = !!(regval & BIT(channel - 1));
 244                 else
 245                         *val = !!(regval & BIT(channel));
 246                 break;
 247         case hwmon_temp_crit_alarm:
 248                 ret = regmap_read(regmap, MAX6697_REG_STAT_CRIT, &regval);
 249                 if (ret)
 250                         return ret;
 251                 /*
 252                  * In the MAX6581 datasheet revision 0 to 3, the local channel
 253                  * overtemperature status is reported in bit 6 of register 0x45,
 254                  * and the overtemperature status for remote channel 7 is
 255                  * reported in bit 7. In Revision 4 and later, the local channel
 256                  * overtemperature status is reported in bit 7, and the remote
 257                  * channel 7 overtemperature status is reported in bit 6. A real
 258                  * chip was found to match the functionality documented in
 259                  * Revision 4 and later.
 260                  */
 261                 *val = !!(regval & BIT(channel ? channel - 1 : 7));
 262                 break;
 263         case hwmon_temp_max_alarm:
 264                 ret = regmap_read(regmap, MAX6697_REG_STAT_ALARM, &regval);
 265                 if (ret)
 266                         return ret;
 267                 *val = !!(regval & BIT(max6697_alarm_channel_map(channel)));
 268                 break;
 269         case hwmon_temp_min_alarm:
 270                 ret = regmap_read(regmap, MAX6697_REG_STAT_MIN_ALARM, &regval);
 271                 if (ret)
 272                         return ret;
 273                 *val = !!(regval & BIT(max6697_alarm_channel_map(channel)));
 274                 break;
 275         default:
 276                 return -EOPNOTSUPP;
 277         }
 278         return 0;
 279 }
 280
 281 static int max6697_write(struct device *dev, enum hwmon_sensor_types type,
 282                          u32 attr, int channel, long val)
 283 {
 284         struct max6697_data *data = dev_get_drvdata(dev);
 285         struct regmap *regmap = data->regmap;
 286         int ret;
 287
 288         switch (attr) {
 289         case hwmon_temp_max:
 290                 val = clamp_val(val, -1000000, 1000000);        /* prevent underflow */
 291                 val = DIV_ROUND_CLOSEST(val, 1000) + data->temp_offset;
 292                 val = clamp_val(val, 0, data->type == max6581 ? 255 : 127);
 293                 return regmap_write(regmap, MAX6697_REG_MAX[channel], val);
 294         case hwmon_temp_crit:
 295                 val = clamp_val(val, -1000000, 1000000);        /* prevent underflow */
 296                 val = DIV_ROUND_CLOSEST(val, 1000) + data->temp_offset;
 297                 val = clamp_val(val, 0, data->type == max6581 ? 255 : 127);
 298                 return regmap_write(regmap, MAX6697_REG_CRIT[channel], val);
 299         case hwmon_temp_min:
 300                 val = clamp_val(val, -1000000, 1000000);        /* prevent underflow */
 301                 val = DIV_ROUND_CLOSEST(val, 1000) + data->temp_offset;
 302                 val = clamp_val(val, 0, 255);
 303                 return regmap_write(regmap, MAX6697_REG_MIN, val);
 304         case hwmon_temp_offset:
 305                 mutex_lock(&data->update_lock);
 306                 val = clamp_val(val, MAX6581_OFFSET_MIN, MAX6581_OFFSET_MAX);
 307                 val = DIV_ROUND_CLOSEST(val, 250);
 308                 if (!val) {     /* disable this (and only this) channel */
 309                         ret = regmap_clear_bits(regmap, MAX6581_REG_OFFSET_SELECT,
 310                                                 BIT(channel - 1));
 311                 } else {
 312                         /* enable channel and update offset */
 313                         ret = regmap_set_bits(regmap, MAX6581_REG_OFFSET_SELECT,
 314                                               BIT(channel - 1));
 315                         if (ret)
 316                                 goto unlock;
 317                         ret = regmap_write(regmap, MAX6581_REG_OFFSET, val);
 318                 }
 319 unlock:
 320                 mutex_unlock(&data->update_lock);
 321                 return ret;
 322         default:
 323                 return -EOPNOTSUPP;
 324         }
 325 }
 326
 327 static umode_t max6697_is_visible(const void *_data, enum hwmon_sensor_types type,
 328                                   u32 attr, int channel)
 329 {
 330         const struct max6697_data *data = _data;
 331         const struct max6697_chip_data *chip = data->chip;
 332
 333         if (channel >= chip->channels)
 334                 return 0;
 335
 336         switch (attr) {
 337         case hwmon_temp_max:
 338                 return 0644;
 339         case hwmon_temp_input:
 340         case hwmon_temp_max_alarm:
 341                 return 0444;
 342         case hwmon_temp_min:
 343                 if (data->type == max6581)
 344                         return channel ? 0444 : 0644;
 345                 break;
 346         case hwmon_temp_min_alarm:
 347                 if (data->type == max6581)
 348                         return 0444;
 349                 break;
 350         case hwmon_temp_crit:
 351                 if (chip->have_crit & BIT(channel))
 352                         return 0644;
 353                 break;
 354         case hwmon_temp_crit_alarm:
 355                 if (chip->have_crit & BIT(channel))
 356                         return 0444;
 357                 break;
 358         case hwmon_temp_fault:
 359                 if (chip->have_fault & BIT(channel))
 360                         return 0444;
 361                 break;
 362         case hwmon_temp_offset:
 363                 if (data->type == max6581 && channel)
 364                         return 0644;
 365                 break;
 366         default:
 367                 break;
 368         }
 369         return 0;
 370 }
 371
 372 /* Return 0 if detection is successful, -ENODEV otherwise */
 373 static const struct hwmon_channel_info * const max6697_info[] = {
 374         HWMON_CHANNEL_INFO(temp,
 375                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 376                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 377                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM,
 378                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 379                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 380                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 381                            HWMON_T_FAULT | HWMON_T_OFFSET,
 382                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 383                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 384                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 385                            HWMON_T_FAULT | HWMON_T_OFFSET,
 386                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 387                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 388                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 389                            HWMON_T_FAULT | HWMON_T_OFFSET,
 390                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 391                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 392                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 393                            HWMON_T_FAULT | HWMON_T_OFFSET,
 394                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 395                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 396                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 397                            HWMON_T_FAULT | HWMON_T_OFFSET,
 398                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 399                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 400                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 401                            HWMON_T_FAULT | HWMON_T_OFFSET,
 402                            HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT |
 403                            HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM |
 404                            HWMON_T_MIN | HWMON_T_MIN_ALARM |
 405                            HWMON_T_FAULT | HWMON_T_OFFSET),
 406         NULL
 407 };
 408
 409 static const struct hwmon_ops max6697_hwmon_ops = {
 410         .is_visible = max6697_is_visible,
 411         .read = max6697_read,
 412         .write = max6697_write,
 413 };
 414
 415 static const struct hwmon_chip_info max6697_chip_info = {
 416         .ops = &max6697_hwmon_ops,
 417         .info = max6697_info,
 418 };
 419
 420 static int max6697_config_of(struct device_node *node, struct max6697_data *data)
 421 {
 422         const struct max6697_chip_data *chip = data->chip;
 423         struct regmap *regmap = data->regmap;
 424         int ret, confreg;
 425         u32 vals[2];
 426
 427         confreg = 0;
 428         if (of_property_read_bool(node, "smbus-timeout-disable") &&
 429             (chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
 430                 confreg |= MAX6697_CONF_TIMEOUT;
 431         }
 432         if (of_property_read_bool(node, "extended-range-enable") &&
 433             (chip->valid_conf & MAX6581_CONF_EXTENDED)) {
 434                 confreg |= MAX6581_CONF_EXTENDED;
 435                 data->temp_offset = 64;
 436         }
 437         if (of_property_read_bool(node, "beta-compensation-enable") &&
 438             (chip->valid_conf & MAX6693_CONF_BETA)) {
 439                 confreg |= MAX6693_CONF_BETA;
 440         }
 441
 442         if (of_property_read_u32(node, "alert-mask", vals))
 443                 vals[0] = 0;
 444         ret = regmap_write(regmap, MAX6697_REG_ALERT_MASK,
 445                            MAX6697_ALERT_MAP_BITS(vals[0]));
 446         if (ret)
 447                 return ret;
 448
 449         if (of_property_read_u32(node, "over-temperature-mask", vals))
 450                 vals[0] = 0;
 451         ret = regmap_write(regmap, MAX6697_REG_OVERT_MASK,
 452                            MAX6697_OVERT_MAP_BITS(vals[0]));
 453         if (ret)
 454                 return ret;
 455
 456         if (data->type != max6581) {
 457                 if (of_property_read_bool(node, "resistance-cancellation") &&
 458                     chip->valid_conf & MAX6697_CONF_RESISTANCE) {
 459                         confreg |= MAX6697_CONF_RESISTANCE;
 460                 }
 461         } else {
 462                 if (of_property_read_u32(node, "resistance-cancellation", &vals[0])) {
 463                         if (of_property_read_bool(node, "resistance-cancellation"))
 464                                 vals[0] = 0xfe;
 465                         else
 466                                 vals[0] = 0;
 467                 }
 468
 469                 vals[0] &= 0xfe;
 470                 ret = regmap_write(regmap, MAX6581_REG_RESISTANCE, vals[0] >> 1);
 471                 if (ret < 0)
 472                         return ret;
 473
 474                 if (of_property_read_u32_array(node, "transistor-ideality", vals, 2)) {
 475                         vals[0] = 0;
 476                         vals[1] = 0;
 477                 }
 478
 479                 ret = regmap_write(regmap, MAX6581_REG_IDEALITY, vals[1]);
 480                 if (ret < 0)
 481                         return ret;
 482                 ret = regmap_write(regmap, MAX6581_REG_IDEALITY_SELECT,
 483                                    (vals[0] & 0xfe) >> 1);
 484                 if (ret < 0)
 485                         return ret;
 486         }
 487         return regmap_write(regmap, MAX6697_REG_CONFIG, confreg);
 488 }
 489
 490 static int max6697_init_chip(struct device_node *np, struct max6697_data *data)
 491 {
 492         unsigned int reg;
 493         int ret;
 494
 495         /*
 496          * Don't touch configuration if there is no devicetree configuration.
 497          * If that is the case, use the current chip configuration.
 498          */
 499         if (!np) {
 500                 struct regmap *regmap = data->regmap;
 501
 502                 ret = regmap_read(regmap, MAX6697_REG_CONFIG, &reg);
 503                 if (ret < 0)
 504                         return ret;
 505                 if (data->type == max6581) {
 506                         if (reg & MAX6581_CONF_EXTENDED)
 507                                 data->temp_offset = 64;
 508                         ret = regmap_read(regmap, MAX6581_REG_RESISTANCE, &reg);
 509                 }
 510         } else {
 511                 ret = max6697_config_of(np, data);
 512         }
 513
 514         return ret;
 515 }
 516
 517 static bool max6697_volatile_reg(struct device *dev, unsigned int reg)
 518 {
 519         switch (reg) {
 520         case 0x00 ... 0x09:     /* temperature high bytes */
 521         case 0x44 ... 0x47:     /* status */
 522         case 0x51 ... 0x58:     /* temperature low bytes */
 523                 return true;
 524         default:
 525                 return false;
 526         }
 527 }
 528
 529 static bool max6697_writeable_reg(struct device *dev, unsigned int reg)
 530 {
 531         return reg != 0x0a && reg != 0x0f && !max6697_volatile_reg(dev, reg);
 532 }
 533
 534 static const struct regmap_config max6697_regmap_config = {
 535         .reg_bits = 8,
 536         .val_bits = 8,
 537         .max_register = 0x58,
 538         .writeable_reg = max6697_writeable_reg,
 539         .volatile_reg = max6697_volatile_reg,
 540         .cache_type = REGCACHE_MAPLE,
 541 };
 542
 543 static int max6697_probe(struct i2c_client *client)
 544 {
 545         struct device *dev = &client->dev;
 546         struct max6697_data *data;
 547         struct device *hwmon_dev;
 548         struct regmap *regmap;
 549         int err;
 550
 551         regmap = regmap_init_i2c(client, &max6697_regmap_config);
 552         if (IS_ERR(regmap))
 553                 return PTR_ERR(regmap);
 554
 555         data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
 556         if (!data)
 557                 return -ENOMEM;
 558
 559         data->regmap = regmap;
 560         data->type = (uintptr_t)i2c_get_match_data(client);
 561         data->chip = &max6697_chip_data[data->type];
 562         mutex_init(&data->update_lock);
 563
 564         err = max6697_init_chip(client->dev.of_node, data);
 565         if (err)
 566                 return err;
 567
 568         hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
 569                                                          &max6697_chip_info, NULL);
 570         return PTR_ERR_OR_ZERO(hwmon_dev);
 571 }
 572
 573 static const struct i2c_device_id max6697_id[] = {
 574         { "max6581", max6581 },
 575         { "max6602", max6602 },
 576         { "max6622", max6622 },
 577         { "max6636", max6636 },
 578         { "max6689", max6689 },
 579         { "max6693", max6693 },
 580         { "max6694", max6694 },
 581         { "max6697", max6697 },
 582         { "max6698", max6698 },
 583         { "max6699", max6699 },
 584         { }
 585 };
 586 MODULE_DEVICE_TABLE(i2c, max6697_id);
 587
 588 static const struct of_device_id __maybe_unused max6697_of_match[] = {
 589         {
 590                 .compatible = "maxim,max6581",
 591                 .data = (void *)max6581
 592         },
 593         {
 594                 .compatible = "maxim,max6602",
 595                 .data = (void *)max6602
 596         },
 597         {
 598                 .compatible = "maxim,max6622",
 599                 .data = (void *)max6622
 600         },
 601         {
 602                 .compatible = "maxim,max6636",
 603                 .data = (void *)max6636
 604         },
 605         {
 606                 .compatible = "maxim,max6689",
 607                 .data = (void *)max6689
 608         },
 609         {
 610                 .compatible = "maxim,max6693",
 611                 .data = (void *)max6693
 612         },
 613         {
 614                 .compatible = "maxim,max6694",
 615                 .data = (void *)max6694
 616         },
 617         {
 618                 .compatible = "maxim,max6697",
 619                 .data = (void *)max6697
 620         },
 621         {
 622                 .compatible = "maxim,max6698",
 623                 .data = (void *)max6698
 624         },
 625         {
 626                 .compatible = "maxim,max6699",
 627                 .data = (void *)max6699
 628         },
 629         { },
 630 };
 631 MODULE_DEVICE_TABLE(of, max6697_of_match);
 632
 633 static struct i2c_driver max6697_driver = {
 634         .driver = {
 635                 .name   = "max6697",
 636                 .of_match_table = of_match_ptr(max6697_of_match),
 637         },
 638         .probe = max6697_probe,
 639         .id_table = max6697_id,
 640 };
 641
 642 module_i2c_driver(max6697_driver);
 643
 644 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
 645 MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
 646 MODULE_LICENSE("GPL");