1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * jc42.c - driver for Jedec JC42.4 compliant temperature sensors 4 * 5 * Copyright (c) 2010 Ericsson AB. 6 * 7 * Derived from lm77.c by Andras BALI <drewie@freemail.hu>. 8 * 9 * JC42.4 compliant temperature sensors are typically used on memory modules. 10 */ 11 12 #include <linux/bitops.h> 13 #include <linux/bitfield.h> 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/jiffies.h> 18 #include <linux/i2c.h> 19 #include <linux/hwmon.h> 20 #include <linux/err.h> 21 #include <linux/mutex.h> 22 #include <linux/of.h> 23 #include <linux/regmap.h> 24 25 /* Addresses to scan */ 26 static const unsigned short normal_i2c[] = { 27 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END }; 28 29 /* JC42 registers. All registers are 16 bit. */ 30 #define JC42_REG_CAP 0x00 31 #define JC42_REG_CONFIG 0x01 32 #define JC42_REG_TEMP_UPPER 0x02 33 #define JC42_REG_TEMP_LOWER 0x03 34 #define JC42_REG_TEMP_CRITICAL 0x04 35 #define JC42_REG_TEMP 0x05 36 #define JC42_REG_MANID 0x06 37 #define JC42_REG_DEVICEID 0x07 38 #define JC42_REG_SMBUS 0x22 /* NXP and Atmel, possibly others? */ 39 40 /* Status bits in temperature register */ 41 #define JC42_ALARM_CRIT BIT(15) 42 #define JC42_ALARM_MAX BIT(14) 43 #define JC42_ALARM_MIN BIT(13) 44 45 /* Configuration register defines */ 46 #define JC42_CFG_CRIT_ONLY BIT(2) 47 #define JC42_CFG_TCRIT_LOCK BIT(6) 48 #define JC42_CFG_EVENT_LOCK BIT(7) 49 #define JC42_CFG_SHUTDOWN BIT(8) 50 #define JC42_CFG_HYST_MASK GENMASK(10, 9) 51 52 /* Capabilities */ 53 #define JC42_CAP_RANGE BIT(2) 54 55 /* Manufacturer IDs */ 56 #define ADT_MANID 0x11d4 /* Analog Devices */ 57 #define ATMEL_MANID 0x001f /* Atmel */ 58 #define ATMEL_MANID2 0x1114 /* Atmel */ 59 #define MAX_MANID 0x004d /* Maxim */ 60 #define IDT_MANID 0x00b3 /* IDT */ 61 #define MCP_MANID 0x0054 /* Microchip */ 62 #define NXP_MANID 0x1131 /* NXP Semiconductors */ 63 #define ONS_MANID 0x1b09 /* ON Semiconductor */ 64 #define STM_MANID 0x104a /* ST Microelectronics */ 65 #define GT_MANID 0x1c68 /* Giantec */ 66 #define GT_MANID2 0x132d /* Giantec, 2nd mfg ID */ 67 #define SI_MANID 0x1c85 /* Seiko Instruments */ 68 69 /* SMBUS register */ 70 #define SMBUS_STMOUT BIT(7) /* SMBus time-out, active low */ 71 72 /* Supported chips */ 73 74 /* Analog Devices */ 75 #define ADT7408_DEVID 0x0801 76 #define ADT7408_DEVID_MASK 0xffff 77 78 /* Atmel */ 79 #define AT30TS00_DEVID 0x8201 80 #define AT30TS00_DEVID_MASK 0xffff 81 82 #define AT30TSE004_DEVID 0x2200 83 #define AT30TSE004_DEVID_MASK 0xffff 84 85 /* Giantec */ 86 #define GT30TS00_DEVID 0x2200 87 #define GT30TS00_DEVID_MASK 0xff00 88 89 #define GT34TS02_DEVID 0x3300 90 #define GT34TS02_DEVID_MASK 0xff00 91 92 /* IDT */ 93 #define TSE2004_DEVID 0x2200 94 #define TSE2004_DEVID_MASK 0xff00 95 96 #define TS3000_DEVID 0x2900 /* Also matches TSE2002 */ 97 #define TS3000_DEVID_MASK 0xff00 98 99 #define TS3001_DEVID 0x3000 100 #define TS3001_DEVID_MASK 0xff00 101 102 /* Maxim */ 103 #define MAX6604_DEVID 0x3e00 104 #define MAX6604_DEVID_MASK 0xffff 105 106 /* Microchip */ 107 #define MCP9804_DEVID 0x0200 108 #define MCP9804_DEVID_MASK 0xfffc 109 110 #define MCP9808_DEVID 0x0400 111 #define MCP9808_DEVID_MASK 0xfffc 112 113 #define MCP98242_DEVID 0x2000 114 #define MCP98242_DEVID_MASK 0xfffc 115 116 #define MCP98243_DEVID 0x2100 117 #define MCP98243_DEVID_MASK 0xfffc 118 119 #define MCP98244_DEVID 0x2200 120 #define MCP98244_DEVID_MASK 0xfffc 121 122 #define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */ 123 #define MCP9843_DEVID_MASK 0xfffe 124 125 /* NXP */ 126 #define SE97_DEVID 0xa200 127 #define SE97_DEVID_MASK 0xfffc 128 129 #define SE98_DEVID 0xa100 130 #define SE98_DEVID_MASK 0xfffc 131 132 /* ON Semiconductor */ 133 #define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */ 134 #define CAT6095_DEVID_MASK 0xffe0 135 136 #define CAT34TS02C_DEVID 0x0a00 137 #define CAT34TS02C_DEVID_MASK 0xfff0 138 139 #define CAT34TS04_DEVID 0x2200 140 #define CAT34TS04_DEVID_MASK 0xfff0 141 142 #define N34TS04_DEVID 0x2230 143 #define N34TS04_DEVID_MASK 0xfff0 144 145 /* ST Microelectronics */ 146 #define STTS424_DEVID 0x0101 147 #define STTS424_DEVID_MASK 0xffff 148 149 #define STTS424E_DEVID 0x0000 150 #define STTS424E_DEVID_MASK 0xfffe 151 152 #define STTS2002_DEVID 0x0300 153 #define STTS2002_DEVID_MASK 0xffff 154 155 #define STTS2004_DEVID 0x2201 156 #define STTS2004_DEVID_MASK 0xffff 157 158 #define STTS3000_DEVID 0x0200 159 #define STTS3000_DEVID_MASK 0xffff 160 161 /* Seiko Instruments */ 162 #define S34TS04A_DEVID 0x2221 163 #define S34TS04A_DEVID_MASK 0xffff 164 165 static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 }; 166 167 struct jc42_chips { 168 u16 manid; 169 u16 devid; 170 u16 devid_mask; 171 }; 172 173 static struct jc42_chips jc42_chips[] = { 174 { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK }, 175 { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK }, 176 { ATMEL_MANID2, AT30TSE004_DEVID, AT30TSE004_DEVID_MASK }, 177 { GT_MANID, GT30TS00_DEVID, GT30TS00_DEVID_MASK }, 178 { GT_MANID2, GT34TS02_DEVID, GT34TS02_DEVID_MASK }, 179 { IDT_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK }, 180 { IDT_MANID, TS3000_DEVID, TS3000_DEVID_MASK }, 181 { IDT_MANID, TS3001_DEVID, TS3001_DEVID_MASK }, 182 { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK }, 183 { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK }, 184 { MCP_MANID, MCP9808_DEVID, MCP9808_DEVID_MASK }, 185 { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK }, 186 { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK }, 187 { MCP_MANID, MCP98244_DEVID, MCP98244_DEVID_MASK }, 188 { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK }, 189 { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK }, 190 { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK }, 191 { ONS_MANID, CAT34TS02C_DEVID, CAT34TS02C_DEVID_MASK }, 192 { ONS_MANID, CAT34TS04_DEVID, CAT34TS04_DEVID_MASK }, 193 { ONS_MANID, N34TS04_DEVID, N34TS04_DEVID_MASK }, 194 { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK }, 195 { SI_MANID, S34TS04A_DEVID, S34TS04A_DEVID_MASK }, 196 { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK }, 197 { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK }, 198 { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK }, 199 { STM_MANID, STTS2004_DEVID, STTS2004_DEVID_MASK }, 200 { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK }, 201 }; 202 203 /* Each client has this additional data */ 204 struct jc42_data { 205 struct mutex update_lock; /* protect register access */ 206 struct regmap *regmap; 207 bool extended; /* true if extended range supported */ 208 bool valid; 209 u16 orig_config; /* original configuration */ 210 u16 config; /* current configuration */ 211 }; 212 213 #define JC42_TEMP_MIN_EXTENDED (-40000) 214 #define JC42_TEMP_MIN 0 215 #define JC42_TEMP_MAX 125000 216 217 static u16 jc42_temp_to_reg(long temp, bool extended) 218 { 219 int ntemp = clamp_val(temp, 220 extended ? JC42_TEMP_MIN_EXTENDED : 221 JC42_TEMP_MIN, JC42_TEMP_MAX); 222 223 /* convert from 0.001 to 0.0625 resolution */ 224 return (ntemp * 2 / 125) & 0x1fff; 225 } 226 227 static int jc42_temp_from_reg(s16 reg) 228 { 229 reg = sign_extend32(reg, 12); 230 231 /* convert from 0.0625 to 0.001 resolution */ 232 return reg * 125 / 2; 233 } 234 235 static int jc42_read(struct device *dev, enum hwmon_sensor_types type, 236 u32 attr, int channel, long *val) 237 { 238 struct jc42_data *data = dev_get_drvdata(dev); 239 unsigned int regval; 240 int ret, temp, hyst; 241 242 mutex_lock(&data->update_lock); 243 244 switch (attr) { 245 case hwmon_temp_input: 246 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val); 247 if (ret) 248 break; 249 250 *val = jc42_temp_from_reg(regval); 251 break; 252 case hwmon_temp_min: 253 ret = regmap_read(data->regmap, JC42_REG_TEMP_LOWER, ®val); 254 if (ret) 255 break; 256 257 *val = jc42_temp_from_reg(regval); 258 break; 259 case hwmon_temp_max: 260 ret = regmap_read(data->regmap, JC42_REG_TEMP_UPPER, ®val); 261 if (ret) 262 break; 263 264 *val = jc42_temp_from_reg(regval); 265 break; 266 case hwmon_temp_crit: 267 ret = regmap_read(data->regmap, JC42_REG_TEMP_CRITICAL, 268 ®val); 269 if (ret) 270 break; 271 272 *val = jc42_temp_from_reg(regval); 273 break; 274 case hwmon_temp_max_hyst: 275 ret = regmap_read(data->regmap, JC42_REG_TEMP_UPPER, ®val); 276 if (ret) 277 break; 278 279 temp = jc42_temp_from_reg(regval); 280 hyst = jc42_hysteresis[FIELD_GET(JC42_CFG_HYST_MASK, 281 data->config)]; 282 *val = temp - hyst; 283 break; 284 case hwmon_temp_crit_hyst: 285 ret = regmap_read(data->regmap, JC42_REG_TEMP_CRITICAL, 286 ®val); 287 if (ret) 288 break; 289 290 temp = jc42_temp_from_reg(regval); 291 hyst = jc42_hysteresis[FIELD_GET(JC42_CFG_HYST_MASK, 292 data->config)]; 293 *val = temp - hyst; 294 break; 295 case hwmon_temp_min_alarm: 296 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val); 297 if (ret) 298 break; 299 300 *val = FIELD_GET(JC42_ALARM_MIN, regval); 301 break; 302 case hwmon_temp_max_alarm: 303 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val); 304 if (ret) 305 break; 306 307 *val = FIELD_GET(JC42_ALARM_MAX, regval); 308 break; 309 case hwmon_temp_crit_alarm: 310 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val); 311 if (ret) 312 break; 313 314 *val = FIELD_GET(JC42_ALARM_CRIT, regval); 315 break; 316 default: 317 ret = -EOPNOTSUPP; 318 break; 319 } 320 321 mutex_unlock(&data->update_lock); 322 323 return ret; 324 } 325 326 static int jc42_write(struct device *dev, enum hwmon_sensor_types type, 327 u32 attr, int channel, long val) 328 { 329 struct jc42_data *data = dev_get_drvdata(dev); 330 unsigned int regval; 331 int diff, hyst; 332 int ret; 333 334 mutex_lock(&data->update_lock); 335 336 switch (attr) { 337 case hwmon_temp_min: 338 ret = regmap_write(data->regmap, JC42_REG_TEMP_LOWER, 339 jc42_temp_to_reg(val, data->extended)); 340 break; 341 case hwmon_temp_max: 342 ret = regmap_write(data->regmap, JC42_REG_TEMP_UPPER, 343 jc42_temp_to_reg(val, data->extended)); 344 break; 345 case hwmon_temp_crit: 346 ret = regmap_write(data->regmap, JC42_REG_TEMP_CRITICAL, 347 jc42_temp_to_reg(val, data->extended)); 348 break; 349 case hwmon_temp_crit_hyst: 350 ret = regmap_read(data->regmap, JC42_REG_TEMP_CRITICAL, 351 ®val); 352 if (ret) 353 break; 354 355 /* 356 * JC42.4 compliant chips only support four hysteresis values. 357 * Pick best choice and go from there. 358 */ 359 val = clamp_val(val, (data->extended ? JC42_TEMP_MIN_EXTENDED 360 : JC42_TEMP_MIN) - 6000, 361 JC42_TEMP_MAX); 362 diff = jc42_temp_from_reg(regval) - val; 363 hyst = 0; 364 if (diff > 0) { 365 if (diff < 2250) 366 hyst = 1; /* 1.5 degrees C */ 367 else if (diff < 4500) 368 hyst = 2; /* 3.0 degrees C */ 369 else 370 hyst = 3; /* 6.0 degrees C */ 371 } 372 data->config = (data->config & ~JC42_CFG_HYST_MASK) | 373 FIELD_PREP(JC42_CFG_HYST_MASK, hyst); 374 ret = regmap_write(data->regmap, JC42_REG_CONFIG, 375 data->config); 376 break; 377 default: 378 ret = -EOPNOTSUPP; 379 break; 380 } 381 382 mutex_unlock(&data->update_lock); 383 384 return ret; 385 } 386 387 static umode_t jc42_is_visible(const void *_data, enum hwmon_sensor_types type, 388 u32 attr, int channel) 389 { 390 const struct jc42_data *data = _data; 391 unsigned int config = data->config; 392 umode_t mode = 0444; 393 394 switch (attr) { 395 case hwmon_temp_min: 396 case hwmon_temp_max: 397 if (!(config & JC42_CFG_EVENT_LOCK)) 398 mode |= 0200; 399 break; 400 case hwmon_temp_crit: 401 if (!(config & JC42_CFG_TCRIT_LOCK)) 402 mode |= 0200; 403 break; 404 case hwmon_temp_crit_hyst: 405 if (!(config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK))) 406 mode |= 0200; 407 break; 408 case hwmon_temp_input: 409 case hwmon_temp_max_hyst: 410 case hwmon_temp_min_alarm: 411 case hwmon_temp_max_alarm: 412 case hwmon_temp_crit_alarm: 413 break; 414 default: 415 mode = 0; 416 break; 417 } 418 return mode; 419 } 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 strscpy(info->type, "jc42", I2C_NAME_SIZE); 447 return 0; 448 } 449 } 450 return -ENODEV; 451 } 452 453 static const struct hwmon_channel_info * const jc42_info[] = { 454 HWMON_CHANNEL_INFO(chip, 455 HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL), 456 HWMON_CHANNEL_INFO(temp, 457 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | 458 HWMON_T_CRIT | HWMON_T_MAX_HYST | 459 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM | 460 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM), 461 NULL 462 }; 463 464 static const struct hwmon_ops jc42_hwmon_ops = { 465 .is_visible = jc42_is_visible, 466 .read = jc42_read, 467 .write = jc42_write, 468 }; 469 470 static const struct hwmon_chip_info jc42_chip_info = { 471 .ops = &jc42_hwmon_ops, 472 .info = jc42_info, 473 }; 474 475 static bool jc42_readable_reg(struct device *dev, unsigned int reg) 476 { 477 return (reg >= JC42_REG_CAP && reg <= JC42_REG_DEVICEID) || 478 reg == JC42_REG_SMBUS; 479 } 480 481 static bool jc42_writable_reg(struct device *dev, unsigned int reg) 482 { 483 return (reg >= JC42_REG_CONFIG && reg <= JC42_REG_TEMP_CRITICAL) || 484 reg == JC42_REG_SMBUS; 485 } 486 487 static bool jc42_volatile_reg(struct device *dev, unsigned int reg) 488 { 489 return reg == JC42_REG_CONFIG || reg == JC42_REG_TEMP; 490 } 491 492 static const struct regmap_config jc42_regmap_config = { 493 .reg_bits = 8, 494 .val_bits = 16, 495 .val_format_endian = REGMAP_ENDIAN_BIG, 496 .max_register = JC42_REG_SMBUS, 497 .writeable_reg = jc42_writable_reg, 498 .readable_reg = jc42_readable_reg, 499 .volatile_reg = jc42_volatile_reg, 500 .cache_type = REGCACHE_MAPLE, 501 }; 502 503 static int jc42_probe(struct i2c_client *client) 504 { 505 struct device *dev = &client->dev; 506 struct device *hwmon_dev; 507 unsigned int config, cap; 508 struct jc42_data *data; 509 int ret; 510 511 data = devm_kzalloc(dev, sizeof(struct jc42_data), GFP_KERNEL); 512 if (!data) 513 return -ENOMEM; 514 515 data->regmap = devm_regmap_init_i2c(client, &jc42_regmap_config); 516 if (IS_ERR(data->regmap)) 517 return PTR_ERR(data->regmap); 518 519 i2c_set_clientdata(client, data); 520 mutex_init(&data->update_lock); 521 522 ret = regmap_read(data->regmap, JC42_REG_CAP, &cap); 523 if (ret) 524 return ret; 525 526 data->extended = !!(cap & JC42_CAP_RANGE); 527 528 if (device_property_read_bool(dev, "smbus-timeout-disable")) { 529 /* 530 * Not all chips support this register, but from a 531 * quick read of various datasheets no chip appears 532 * incompatible with the below attempt to disable 533 * the timeout. And the whole thing is opt-in... 534 */ 535 ret = regmap_set_bits(data->regmap, JC42_REG_SMBUS, 536 SMBUS_STMOUT); 537 if (ret) 538 return ret; 539 } 540 541 ret = regmap_read(data->regmap, JC42_REG_CONFIG, &config); 542 if (ret) 543 return ret; 544 545 data->orig_config = config; 546 if (config & JC42_CFG_SHUTDOWN) { 547 config &= ~JC42_CFG_SHUTDOWN; 548 regmap_write(data->regmap, JC42_REG_CONFIG, config); 549 } 550 data->config = config; 551 552 hwmon_dev = devm_hwmon_device_register_with_info(dev, "jc42", 553 data, &jc42_chip_info, 554 NULL); 555 return PTR_ERR_OR_ZERO(hwmon_dev); 556 } 557 558 static void jc42_remove(struct i2c_client *client) 559 { 560 struct jc42_data *data = i2c_get_clientdata(client); 561 562 /* Restore original configuration except hysteresis */ 563 if ((data->config & ~JC42_CFG_HYST_MASK) != 564 (data->orig_config & ~JC42_CFG_HYST_MASK)) { 565 int config; 566 567 config = (data->orig_config & ~JC42_CFG_HYST_MASK) 568 | (data->config & JC42_CFG_HYST_MASK); 569 regmap_write(data->regmap, JC42_REG_CONFIG, config); 570 } 571 } 572 573 #ifdef CONFIG_PM 574 575 static int jc42_suspend(struct device *dev) 576 { 577 struct jc42_data *data = dev_get_drvdata(dev); 578 579 data->config |= JC42_CFG_SHUTDOWN; 580 regmap_write(data->regmap, JC42_REG_CONFIG, data->config); 581 582 regcache_cache_only(data->regmap, true); 583 regcache_mark_dirty(data->regmap); 584 585 return 0; 586 } 587 588 static int jc42_resume(struct device *dev) 589 { 590 struct jc42_data *data = dev_get_drvdata(dev); 591 592 regcache_cache_only(data->regmap, false); 593 594 data->config &= ~JC42_CFG_SHUTDOWN; 595 regmap_write(data->regmap, JC42_REG_CONFIG, data->config); 596 597 /* Restore cached register values to hardware */ 598 return regcache_sync(data->regmap); 599 } 600 601 static const struct dev_pm_ops jc42_dev_pm_ops = { 602 .suspend = jc42_suspend, 603 .resume = jc42_resume, 604 }; 605 606 #define JC42_DEV_PM_OPS (&jc42_dev_pm_ops) 607 #else 608 #define JC42_DEV_PM_OPS NULL 609 #endif /* CONFIG_PM */ 610 611 static const struct i2c_device_id jc42_id[] = { 612 { "jc42", 0 }, 613 { } 614 }; 615 MODULE_DEVICE_TABLE(i2c, jc42_id); 616 617 #ifdef CONFIG_OF 618 static const struct of_device_id jc42_of_ids[] = { 619 { .compatible = "jedec,jc-42.4-temp", }, 620 { } 621 }; 622 MODULE_DEVICE_TABLE(of, jc42_of_ids); 623 #endif 624 625 static struct i2c_driver jc42_driver = { 626 .class = I2C_CLASS_SPD | I2C_CLASS_HWMON, 627 .driver = { 628 .name = "jc42", 629 .pm = JC42_DEV_PM_OPS, 630 .of_match_table = of_match_ptr(jc42_of_ids), 631 }, 632 .probe = jc42_probe, 633 .remove = jc42_remove, 634 .id_table = jc42_id, 635 .detect = jc42_detect, 636 .address_list = normal_i2c, 637 }; 638 639 module_i2c_driver(jc42_driver); 640 641 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); 642 MODULE_DESCRIPTION("JC42 driver"); 643 MODULE_LICENSE("GPL"); 644