drivers/hwmon/jc42.c

   1 /*
   2  * jc42.c - driver for Jedec JC42.4 compliant temperature sensors
   3  *
   4  * Copyright (c) 2010  Ericsson AB.
   5  *
   6  * Derived from lm77.c by Andras BALI <drewie@freemail.hu>.
   7  *
   8  * JC42.4 compliant temperature sensors are typically used on memory modules.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/i2c.h>
  30 #include <linux/hwmon.h>
  31 #include <linux/hwmon-sysfs.h>
  32 #include <linux/err.h>
  33 #include <linux/mutex.h>
  34 #include <linux/of.h>
  35
  36 /* Addresses to scan */
  37 static const unsigned short normal_i2c[] = {
  38         0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END };
  39
  40 /* JC42 registers. All registers are 16 bit. */
  41 #define JC42_REG_CAP            0x00
  42 #define JC42_REG_CONFIG         0x01
  43 #define JC42_REG_TEMP_UPPER     0x02
  44 #define JC42_REG_TEMP_LOWER     0x03
  45 #define JC42_REG_TEMP_CRITICAL  0x04
  46 #define JC42_REG_TEMP           0x05
  47 #define JC42_REG_MANID          0x06
  48 #define JC42_REG_DEVICEID       0x07
  49
  50 /* Status bits in temperature register */
  51 #define JC42_ALARM_CRIT_BIT     15
  52 #define JC42_ALARM_MAX_BIT      14
  53 #define JC42_ALARM_MIN_BIT      13
  54
  55 /* Configuration register defines */
  56 #define JC42_CFG_CRIT_ONLY      (1 << 2)
  57 #define JC42_CFG_TCRIT_LOCK     (1 << 6)
  58 #define JC42_CFG_EVENT_LOCK     (1 << 7)
  59 #define JC42_CFG_SHUTDOWN       (1 << 8)
  60 #define JC42_CFG_HYST_SHIFT     9
  61 #define JC42_CFG_HYST_MASK      (0x03 << 9)
  62
  63 /* Capabilities */
  64 #define JC42_CAP_RANGE          (1 << 2)
  65
  66 /* Manufacturer IDs */
  67 #define ADT_MANID               0x11d4  /* Analog Devices */
  68 #define ATMEL_MANID             0x001f  /* Atmel */
  69 #define ATMEL_MANID2            0x1114  /* Atmel */
  70 #define MAX_MANID               0x004d  /* Maxim */
  71 #define IDT_MANID               0x00b3  /* IDT */
  72 #define MCP_MANID               0x0054  /* Microchip */
  73 #define NXP_MANID               0x1131  /* NXP Semiconductors */
  74 #define ONS_MANID               0x1b09  /* ON Semiconductor */
  75 #define STM_MANID               0x104a  /* ST Microelectronics */
  76
  77 /* Supported chips */
  78
  79 /* Analog Devices */
  80 #define ADT7408_DEVID           0x0801
  81 #define ADT7408_DEVID_MASK      0xffff
  82
  83 /* Atmel */
  84 #define AT30TS00_DEVID          0x8201
  85 #define AT30TS00_DEVID_MASK     0xffff
  86
  87 #define AT30TSE004_DEVID        0x2200
  88 #define AT30TSE004_DEVID_MASK   0xffff
  89
  90 /* IDT */
  91 #define TSE2004_DEVID           0x2200
  92 #define TSE2004_DEVID_MASK      0xff00
  93
  94 #define TS3000_DEVID            0x2900  /* Also matches TSE2002 */
  95 #define TS3000_DEVID_MASK       0xff00
  96
  97 #define TS3001_DEVID            0x3000
  98 #define TS3001_DEVID_MASK       0xff00
  99
 100 /* Maxim */
 101 #define MAX6604_DEVID           0x3e00
 102 #define MAX6604_DEVID_MASK      0xffff
 103
 104 /* Microchip */
 105 #define MCP9804_DEVID           0x0200
 106 #define MCP9804_DEVID_MASK      0xfffc
 107
 108 #define MCP9808_DEVID           0x0400
 109 #define MCP9808_DEVID_MASK      0xfffc
 110
 111 #define MCP98242_DEVID          0x2000
 112 #define MCP98242_DEVID_MASK     0xfffc
 113
 114 #define MCP98243_DEVID          0x2100
 115 #define MCP98243_DEVID_MASK     0xfffc
 116
 117 #define MCP98244_DEVID          0x2200
 118 #define MCP98244_DEVID_MASK     0xfffc
 119
 120 #define MCP9843_DEVID           0x0000  /* Also matches mcp9805 */
 121 #define MCP9843_DEVID_MASK      0xfffe
 122
 123 /* NXP */
 124 #define SE97_DEVID              0xa200
 125 #define SE97_DEVID_MASK         0xfffc
 126
 127 #define SE98_DEVID              0xa100
 128 #define SE98_DEVID_MASK         0xfffc
 129
 130 /* ON Semiconductor */
 131 #define CAT6095_DEVID           0x0800  /* Also matches CAT34TS02 */
 132 #define CAT6095_DEVID_MASK      0xffe0
 133
 134 /* ST Microelectronics */
 135 #define STTS424_DEVID           0x0101
 136 #define STTS424_DEVID_MASK      0xffff
 137
 138 #define STTS424E_DEVID          0x0000
 139 #define STTS424E_DEVID_MASK     0xfffe
 140
 141 #define STTS2002_DEVID          0x0300
 142 #define STTS2002_DEVID_MASK     0xffff
 143
 144 #define STTS2004_DEVID          0x2201
 145 #define STTS2004_DEVID_MASK     0xffff
 146
 147 #define STTS3000_DEVID          0x0200
 148 #define STTS3000_DEVID_MASK     0xffff
 149
 150 static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 };
 151
 152 struct jc42_chips {
 153         u16 manid;
 154         u16 devid;
 155         u16 devid_mask;
 156 };
 157
 158 static struct jc42_chips jc42_chips[] = {
 159         { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK },
 160         { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK },
 161         { ATMEL_MANID2, AT30TSE004_DEVID, AT30TSE004_DEVID_MASK },
 162         { IDT_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
 163         { IDT_MANID, TS3000_DEVID, TS3000_DEVID_MASK },
 164         { IDT_MANID, TS3001_DEVID, TS3001_DEVID_MASK },
 165         { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK },
 166         { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK },
 167         { MCP_MANID, MCP9808_DEVID, MCP9808_DEVID_MASK },
 168         { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK },
 169         { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK },
 170         { MCP_MANID, MCP98244_DEVID, MCP98244_DEVID_MASK },
 171         { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK },
 172         { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK },
 173         { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK },
 174         { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK },
 175         { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK },
 176         { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK },
 177         { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK },
 178         { STM_MANID, STTS2004_DEVID, STTS2004_DEVID_MASK },
 179         { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK },
 180 };
 181
 182 enum temp_index {
 183         t_input = 0,
 184         t_crit,
 185         t_min,
 186         t_max,
 187         t_num_temp
 188 };
 189
 190 static const u8 temp_regs[t_num_temp] = {
 191         [t_input] = JC42_REG_TEMP,
 192         [t_crit] = JC42_REG_TEMP_CRITICAL,
 193         [t_min] = JC42_REG_TEMP_LOWER,
 194         [t_max] = JC42_REG_TEMP_UPPER,
 195 };
 196
 197 /* Each client has this additional data */
 198 struct jc42_data {
 199         struct i2c_client *client;
 200         struct mutex    update_lock;    /* protect register access */
 201         bool            extended;       /* true if extended range supported */
 202         bool            valid;
 203         unsigned long   last_updated;   /* In jiffies */
 204         u16             orig_config;    /* original configuration */
 205         u16             config;         /* current configuration */
 206         u16             temp[t_num_temp];/* Temperatures */
 207 };
 208
 209 #define JC42_TEMP_MIN_EXTENDED  (-40000)
 210 #define JC42_TEMP_MIN           0
 211 #define JC42_TEMP_MAX           125000
 212
 213 static u16 jc42_temp_to_reg(long temp, bool extended)
 214 {
 215         int ntemp = clamp_val(temp,
 216                               extended ? JC42_TEMP_MIN_EXTENDED :
 217                               JC42_TEMP_MIN, JC42_TEMP_MAX);
 218
 219         /* convert from 0.001 to 0.0625 resolution */
 220         return (ntemp * 2 / 125) & 0x1fff;
 221 }
 222
 223 static int jc42_temp_from_reg(s16 reg)
 224 {
 225         reg = sign_extend32(reg, 12);
 226
 227         /* convert from 0.0625 to 0.001 resolution */
 228         return reg * 125 / 2;
 229 }
 230
 231 static struct jc42_data *jc42_update_device(struct device *dev)
 232 {
 233         struct jc42_data *data = dev_get_drvdata(dev);
 234         struct i2c_client *client = data->client;
 235         struct jc42_data *ret = data;
 236         int i, val;
 237
 238         mutex_lock(&data->update_lock);
 239
 240         if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
 241                 for (i = 0; i < t_num_temp; i++) {
 242                         val = i2c_smbus_read_word_swapped(client, temp_regs[i]);
 243                         if (val < 0) {
 244                                 ret = ERR_PTR(val);
 245                                 goto abort;
 246                         }
 247                         data->temp[i] = val;
 248                 }
 249                 data->last_updated = jiffies;
 250                 data->valid = true;
 251         }
 252 abort:
 253         mutex_unlock(&data->update_lock);
 254         return ret;
 255 }
 256
 257 /* sysfs functions */
 258
 259 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
 260                          char *buf)
 261 {
 262         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 263         struct jc42_data *data = jc42_update_device(dev);
 264         if (IS_ERR(data))
 265                 return PTR_ERR(data);
 266         return sprintf(buf, "%d\n",
 267                        jc42_temp_from_reg(data->temp[attr->index]));
 268 }
 269
 270 static ssize_t show_temp_hyst(struct device *dev,
 271                               struct device_attribute *devattr, char *buf)
 272 {
 273         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 274         struct jc42_data *data = jc42_update_device(dev);
 275         int temp, hyst;
 276
 277         if (IS_ERR(data))
 278                 return PTR_ERR(data);
 279
 280         temp = jc42_temp_from_reg(data->temp[attr->index]);
 281         hyst = jc42_hysteresis[(data->config & JC42_CFG_HYST_MASK)
 282                                >> JC42_CFG_HYST_SHIFT];
 283         return sprintf(buf, "%d\n", temp - hyst);
 284 }
 285
 286 static ssize_t set_temp(struct device *dev, struct device_attribute *devattr,
 287                         const char *buf, size_t count)
 288 {
 289         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 290         struct jc42_data *data = dev_get_drvdata(dev);
 291         int err, ret = count;
 292         int nr = attr->index;
 293         long val;
 294
 295         if (kstrtol(buf, 10, &val) < 0)
 296                 return -EINVAL;
 297         mutex_lock(&data->update_lock);
 298         data->temp[nr] = jc42_temp_to_reg(val, data->extended);
 299         err = i2c_smbus_write_word_swapped(data->client, temp_regs[nr],
 300                                            data->temp[nr]);
 301         if (err < 0)
 302                 ret = err;
 303         mutex_unlock(&data->update_lock);
 304         return ret;
 305 }
 306
 307 /*
 308  * JC42.4 compliant chips only support four hysteresis values.
 309  * Pick best choice and go from there.
 310  */
 311 static ssize_t set_temp_crit_hyst(struct device *dev,
 312                                   struct device_attribute *attr,
 313                                   const char *buf, size_t count)
 314 {
 315         struct jc42_data *data = dev_get_drvdata(dev);
 316         long val;
 317         int diff, hyst;
 318         int err;
 319         int ret = count;
 320
 321         if (kstrtol(buf, 10, &val) < 0)
 322                 return -EINVAL;
 323
 324         val = clamp_val(val, (data->extended ? JC42_TEMP_MIN_EXTENDED :
 325                               JC42_TEMP_MIN) - 6000, JC42_TEMP_MAX);
 326         diff = jc42_temp_from_reg(data->temp[t_crit]) - val;
 327
 328         hyst = 0;
 329         if (diff > 0) {
 330                 if (diff < 2250)
 331                         hyst = 1;       /* 1.5 degrees C */
 332                 else if (diff < 4500)
 333                         hyst = 2;       /* 3.0 degrees C */
 334                 else
 335                         hyst = 3;       /* 6.0 degrees C */
 336         }
 337
 338         mutex_lock(&data->update_lock);
 339         data->config = (data->config & ~JC42_CFG_HYST_MASK)
 340           | (hyst << JC42_CFG_HYST_SHIFT);
 341         err = i2c_smbus_write_word_swapped(data->client, JC42_REG_CONFIG,
 342                                            data->config);
 343         if (err < 0)
 344                 ret = err;
 345         mutex_unlock(&data->update_lock);
 346         return ret;
 347 }
 348
 349 static ssize_t show_alarm(struct device *dev,
 350                           struct device_attribute *attr, char *buf)
 351 {
 352         u16 bit = to_sensor_dev_attr(attr)->index;
 353         struct jc42_data *data = jc42_update_device(dev);
 354         u16 val;
 355
 356         if (IS_ERR(data))
 357                 return PTR_ERR(data);
 358
 359         val = data->temp[t_input];
 360         if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY))
 361                 val = 0;
 362         return sprintf(buf, "%u\n", (val >> bit) & 1);
 363 }
 364
 365 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, t_input);
 366 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, set_temp, t_crit);
 367 static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO, show_temp, set_temp, t_min);
 368 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, set_temp, t_max);
 369
 370 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, show_temp_hyst,
 371                           set_temp_crit_hyst, t_crit);
 372 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO, show_temp_hyst, NULL, t_max);
 373
 374 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
 375                           JC42_ALARM_CRIT_BIT);
 376 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
 377                           JC42_ALARM_MIN_BIT);
 378 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
 379                           JC42_ALARM_MAX_BIT);
 380
 381 static struct attribute *jc42_attributes[] = {
 382         &sensor_dev_attr_temp1_input.dev_attr.attr,
 383         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 384         &sensor_dev_attr_temp1_min.dev_attr.attr,
 385         &sensor_dev_attr_temp1_max.dev_attr.attr,
 386         &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
 387         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 388         &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
 389         &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
 390         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
 391         NULL
 392 };
 393
 394 static umode_t jc42_attribute_mode(struct kobject *kobj,
 395                                   struct attribute *attr, int index)
 396 {
 397         struct device *dev = container_of(kobj, struct device, kobj);
 398         struct jc42_data *data = dev_get_drvdata(dev);
 399         unsigned int config = data->config;
 400         bool readonly;
 401
 402         if (attr == &sensor_dev_attr_temp1_crit.dev_attr.attr)
 403                 readonly = config & JC42_CFG_TCRIT_LOCK;
 404         else if (attr == &sensor_dev_attr_temp1_min.dev_attr.attr ||
 405                  attr == &sensor_dev_attr_temp1_max.dev_attr.attr)
 406                 readonly = config & JC42_CFG_EVENT_LOCK;
 407         else if (attr == &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr)
 408                 readonly = config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK);
 409         else
 410                 readonly = true;
 411
 412         return S_IRUGO | (readonly ? 0 : S_IWUSR);
 413 }
 414
 415 static const struct attribute_group jc42_group = {
 416         .attrs = jc42_attributes,
 417         .is_visible = jc42_attribute_mode,
 418 };
 419 __ATTRIBUTE_GROUPS(jc42);
 420
 421 /* Return 0 if detection is successful, -ENODEV otherwise */
 422 static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info)
 423 {
 424         struct i2c_adapter *adapter = client->adapter;
 425         int i, config, cap, manid, devid;
 426
 427         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
 428                                      I2C_FUNC_SMBUS_WORD_DATA))
 429                 return -ENODEV;
 430
 431         cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
 432         config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
 433         manid = i2c_smbus_read_word_swapped(client, JC42_REG_MANID);
 434         devid = i2c_smbus_read_word_swapped(client, JC42_REG_DEVICEID);
 435
 436         if (cap < 0 || config < 0 || manid < 0 || devid < 0)
 437                 return -ENODEV;
 438
 439         if ((cap & 0xff00) || (config & 0xf800))
 440                 return -ENODEV;
 441
 442         for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
 443                 struct jc42_chips *chip = &jc42_chips[i];
 444                 if (manid == chip->manid &&
 445                     (devid & chip->devid_mask) == chip->devid) {
 446                         strlcpy(info->type, "jc42", I2C_NAME_SIZE);
 447                         return 0;
 448                 }
 449         }
 450         return -ENODEV;
 451 }
 452
 453 static int jc42_probe(struct i2c_client *client, const struct i2c_device_id *id)
 454 {
 455         struct device *dev = &client->dev;
 456         struct device *hwmon_dev;
 457         struct jc42_data *data;
 458         int config, cap;
 459
 460         data = devm_kzalloc(dev, sizeof(struct jc42_data), GFP_KERNEL);
 461         if (!data)
 462                 return -ENOMEM;
 463
 464         data->client = client;
 465         i2c_set_clientdata(client, data);
 466         mutex_init(&data->update_lock);
 467
 468         cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
 469         if (cap < 0)
 470                 return cap;
 471
 472         data->extended = !!(cap & JC42_CAP_RANGE);
 473
 474         config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
 475         if (config < 0)
 476                 return config;
 477
 478         data->orig_config = config;
 479         if (config & JC42_CFG_SHUTDOWN) {
 480                 config &= ~JC42_CFG_SHUTDOWN;
 481                 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, config);
 482         }
 483         data->config = config;
 484
 485         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
 486                                                            data,
 487                                                            jc42_groups);
 488         return PTR_ERR_OR_ZERO(hwmon_dev);
 489 }
 490
 491 static int jc42_remove(struct i2c_client *client)
 492 {
 493         struct jc42_data *data = i2c_get_clientdata(client);
 494
 495         /* Restore original configuration except hysteresis */
 496         if ((data->config & ~JC42_CFG_HYST_MASK) !=
 497             (data->orig_config & ~JC42_CFG_HYST_MASK)) {
 498                 int config;
 499
 500                 config = (data->orig_config & ~JC42_CFG_HYST_MASK)
 501                   | (data->config & JC42_CFG_HYST_MASK);
 502                 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, config);
 503         }
 504         return 0;
 505 }
 506
 507 #ifdef CONFIG_PM
 508
 509 static int jc42_suspend(struct device *dev)
 510 {
 511         struct jc42_data *data = dev_get_drvdata(dev);
 512
 513         data->config |= JC42_CFG_SHUTDOWN;
 514         i2c_smbus_write_word_swapped(data->client, JC42_REG_CONFIG,
 515                                      data->config);
 516         return 0;
 517 }
 518
 519 static int jc42_resume(struct device *dev)
 520 {
 521         struct jc42_data *data = dev_get_drvdata(dev);
 522
 523         data->config &= ~JC42_CFG_SHUTDOWN;
 524         i2c_smbus_write_word_swapped(data->client, JC42_REG_CONFIG,
 525                                      data->config);
 526         return 0;
 527 }
 528
 529 static const struct dev_pm_ops jc42_dev_pm_ops = {
 530         .suspend = jc42_suspend,
 531         .resume = jc42_resume,
 532 };
 533
 534 #define JC42_DEV_PM_OPS (&jc42_dev_pm_ops)
 535 #else
 536 #define JC42_DEV_PM_OPS NULL
 537 #endif /* CONFIG_PM */
 538
 539 static const struct i2c_device_id jc42_id[] = {
 540         { "jc42", 0 },
 541         { }
 542 };
 543 MODULE_DEVICE_TABLE(i2c, jc42_id);
 544
 545 #ifdef CONFIG_OF
 546 static const struct of_device_id jc42_of_ids[] = {
 547         { .compatible = "jedec,jc-42.4-temp", },
 548         { }
 549 };
 550 MODULE_DEVICE_TABLE(of, jc42_of_ids);
 551 #endif
 552
 553 static struct i2c_driver jc42_driver = {
 554         .class          = I2C_CLASS_SPD | I2C_CLASS_HWMON,
 555         .driver = {
 556                 .name   = "jc42",
 557                 .pm = JC42_DEV_PM_OPS,
 558                 .of_match_table = of_match_ptr(jc42_of_ids),
 559         },
 560         .probe          = jc42_probe,
 561         .remove         = jc42_remove,
 562         .id_table       = jc42_id,
 563         .detect         = jc42_detect,
 564         .address_list   = normal_i2c,
 565 };
 566
 567 module_i2c_driver(jc42_driver);
 568
 569 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
 570 MODULE_DESCRIPTION("JC42 driver");
 571 MODULE_LICENSE("GPL");