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 GT34TS02_DEVID 0x3300
83 #define GT34TS02_DEVID_MASK 0xff00
84
85 #define TS3000_DEVID 0x2900 /* Also matches TSE2002 */
86 #define TS3000_DEVID_MASK 0xff00
87
88 #define TS3001_DEVID 0x3000
89 #define TS3001_DEVID_MASK 0xff00
90
91 /* Maxim */
92 #define MAX6604_DEVID 0x3e00
93 #define MAX6604_DEVID_MASK 0xffff
94
95 /* Microchip */
96 #define MCP9804_DEVID 0x0200
97 #define MCP9804_DEVID_MASK 0xfffc
98
99 #define MCP9808_DEVID 0x0400
100 #define MCP9808_DEVID_MASK 0xfffc
101
102 #define MCP98242_DEVID 0x2000
103 #define MCP98242_DEVID_MASK 0xfffc
104
105 #define MCP98243_DEVID 0x2100
106 #define MCP98243_DEVID_MASK 0xfffc
107
108 #define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */
109 #define MCP9843_DEVID_MASK 0xfffe
110
111 /* NXP */
112 #define SE97_DEVID 0xa200
113 #define SE97_DEVID_MASK 0xfffc
114
115 #define SE98_DEVID 0xa100
116 #define SE98_DEVID_MASK 0xfffc
117
118 /* ON Semiconductor */
119 #define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */
120 #define CAT6095_DEVID_MASK 0xffe0
121
122 #define CAT34TS02C_DEVID 0x0a00
123 #define CAT34TS02C_DEVID_MASK 0xfff0
124
125 /* ST Microelectronics */
126 #define STTS424_DEVID 0x0101
127 #define STTS424_DEVID_MASK 0xffff
128
129 #define STTS424E_DEVID 0x0000
130 #define STTS424E_DEVID_MASK 0xfffe
131
132 #define STTS2002_DEVID 0x0300
133 #define STTS2002_DEVID_MASK 0xffff
134
135 #define STTS3000_DEVID 0x0200
136 #define STTS3000_DEVID_MASK 0xffff
137
138 /* TSE2004 compliant sensors */
139 #define TSE2004_DEVID 0x2200
140 #define TSE2004_DEVID_MASK 0xff00
141
142 static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 };
143
144 struct jc42_chips {
145 u16 manid;
146 u16 devid;
147 u16 devid_mask;
148 };
149
150 static struct jc42_chips jc42_chips[] = {
151 { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK },
152 { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK },
153 { ATMEL_MANID2, TSE2004_DEVID, TSE2004_DEVID_MASK },
154 { GT_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
155 { GT_MANID2, GT34TS02_DEVID, GT34TS02_DEVID_MASK },
156 { IDT_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
157 { IDT_MANID, TS3000_DEVID, TS3000_DEVID_MASK },
158 { IDT_MANID, TS3001_DEVID, TS3001_DEVID_MASK },
159 { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK },
160 { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK },
161 { MCP_MANID, MCP9808_DEVID, MCP9808_DEVID_MASK },
162 { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK },
163 { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK },
164 { MCP_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
165 { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK },
166 { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK },
167 { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK },
168 { ONS_MANID, CAT34TS02C_DEVID, CAT34TS02C_DEVID_MASK },
169 { ONS_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
170 { ONS_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
171 { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK },
172 { SI_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
173 { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK },
174 { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK },
175 { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK },
176 { STM_MANID, TSE2004_DEVID, TSE2004_DEVID_MASK },
177 { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK },
178 };
179
180 /* Each client has this additional data */
181 struct jc42_data {
182 struct mutex update_lock; /* protect register access */
183 struct regmap *regmap;
184 bool extended; /* true if extended range supported */
185 bool valid;
186 u16 orig_config; /* original configuration */
187 u16 config; /* current configuration */
188 };
189
190 #define JC42_TEMP_MIN_EXTENDED (-40000)
191 #define JC42_TEMP_MIN 0
192 #define JC42_TEMP_MAX 125000
193
jc42_temp_to_reg(long temp,bool extended)194 static u16 jc42_temp_to_reg(long temp, bool extended)
195 {
196 int ntemp = clamp_val(temp,
197 extended ? JC42_TEMP_MIN_EXTENDED :
198 JC42_TEMP_MIN, JC42_TEMP_MAX);
199
200 /* convert from 0.001 to 0.0625 resolution */
201 return (ntemp * 2 / 125) & 0x1fff;
202 }
203
jc42_temp_from_reg(s16 reg)204 static int jc42_temp_from_reg(s16 reg)
205 {
206 reg = sign_extend32(reg, 12);
207
208 /* convert from 0.0625 to 0.001 resolution */
209 return reg * 125 / 2;
210 }
211
jc42_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)212 static int jc42_read(struct device *dev, enum hwmon_sensor_types type,
213 u32 attr, int channel, long *val)
214 {
215 struct jc42_data *data = dev_get_drvdata(dev);
216 unsigned int regval;
217 int ret, temp, hyst;
218
219 mutex_lock(&data->update_lock);
220
221 switch (attr) {
222 case hwmon_temp_input:
223 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val);
224 if (ret)
225 break;
226
227 *val = jc42_temp_from_reg(regval);
228 break;
229 case hwmon_temp_min:
230 ret = regmap_read(data->regmap, JC42_REG_TEMP_LOWER, ®val);
231 if (ret)
232 break;
233
234 *val = jc42_temp_from_reg(regval);
235 break;
236 case hwmon_temp_max:
237 ret = regmap_read(data->regmap, JC42_REG_TEMP_UPPER, ®val);
238 if (ret)
239 break;
240
241 *val = jc42_temp_from_reg(regval);
242 break;
243 case hwmon_temp_crit:
244 ret = regmap_read(data->regmap, JC42_REG_TEMP_CRITICAL,
245 ®val);
246 if (ret)
247 break;
248
249 *val = jc42_temp_from_reg(regval);
250 break;
251 case hwmon_temp_max_hyst:
252 ret = regmap_read(data->regmap, JC42_REG_TEMP_UPPER, ®val);
253 if (ret)
254 break;
255
256 temp = jc42_temp_from_reg(regval);
257 hyst = jc42_hysteresis[FIELD_GET(JC42_CFG_HYST_MASK,
258 data->config)];
259 *val = temp - hyst;
260 break;
261 case hwmon_temp_crit_hyst:
262 ret = regmap_read(data->regmap, JC42_REG_TEMP_CRITICAL,
263 ®val);
264 if (ret)
265 break;
266
267 temp = jc42_temp_from_reg(regval);
268 hyst = jc42_hysteresis[FIELD_GET(JC42_CFG_HYST_MASK,
269 data->config)];
270 *val = temp - hyst;
271 break;
272 case hwmon_temp_min_alarm:
273 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val);
274 if (ret)
275 break;
276
277 *val = FIELD_GET(JC42_ALARM_MIN, regval);
278 break;
279 case hwmon_temp_max_alarm:
280 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val);
281 if (ret)
282 break;
283
284 *val = FIELD_GET(JC42_ALARM_MAX, regval);
285 break;
286 case hwmon_temp_crit_alarm:
287 ret = regmap_read(data->regmap, JC42_REG_TEMP, ®val);
288 if (ret)
289 break;
290
291 *val = FIELD_GET(JC42_ALARM_CRIT, regval);
292 break;
293 default:
294 ret = -EOPNOTSUPP;
295 break;
296 }
297
298 mutex_unlock(&data->update_lock);
299
300 return ret;
301 }
302
jc42_write(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long val)303 static int jc42_write(struct device *dev, enum hwmon_sensor_types type,
304 u32 attr, int channel, long val)
305 {
306 struct jc42_data *data = dev_get_drvdata(dev);
307 unsigned int regval;
308 int diff, hyst;
309 int ret;
310
311 mutex_lock(&data->update_lock);
312
313 switch (attr) {
314 case hwmon_temp_min:
315 ret = regmap_write(data->regmap, JC42_REG_TEMP_LOWER,
316 jc42_temp_to_reg(val, data->extended));
317 break;
318 case hwmon_temp_max:
319 ret = regmap_write(data->regmap, JC42_REG_TEMP_UPPER,
320 jc42_temp_to_reg(val, data->extended));
321 break;
322 case hwmon_temp_crit:
323 ret = regmap_write(data->regmap, JC42_REG_TEMP_CRITICAL,
324 jc42_temp_to_reg(val, data->extended));
325 break;
326 case hwmon_temp_crit_hyst:
327 ret = regmap_read(data->regmap, JC42_REG_TEMP_CRITICAL,
328 ®val);
329 if (ret)
330 break;
331
332 /*
333 * JC42.4 compliant chips only support four hysteresis values.
334 * Pick best choice and go from there.
335 */
336 val = clamp_val(val, (data->extended ? JC42_TEMP_MIN_EXTENDED
337 : JC42_TEMP_MIN) - 6000,
338 JC42_TEMP_MAX);
339 diff = jc42_temp_from_reg(regval) - val;
340 hyst = 0;
341 if (diff > 0) {
342 if (diff < 2250)
343 hyst = 1; /* 1.5 degrees C */
344 else if (diff < 4500)
345 hyst = 2; /* 3.0 degrees C */
346 else
347 hyst = 3; /* 6.0 degrees C */
348 }
349 data->config = (data->config & ~JC42_CFG_HYST_MASK) |
350 FIELD_PREP(JC42_CFG_HYST_MASK, hyst);
351 ret = regmap_write(data->regmap, JC42_REG_CONFIG,
352 data->config);
353 break;
354 default:
355 ret = -EOPNOTSUPP;
356 break;
357 }
358
359 mutex_unlock(&data->update_lock);
360
361 return ret;
362 }
363
jc42_is_visible(const void * _data,enum hwmon_sensor_types type,u32 attr,int channel)364 static umode_t jc42_is_visible(const void *_data, enum hwmon_sensor_types type,
365 u32 attr, int channel)
366 {
367 const struct jc42_data *data = _data;
368 unsigned int config = data->config;
369 umode_t mode = 0444;
370
371 switch (attr) {
372 case hwmon_temp_min:
373 case hwmon_temp_max:
374 if (!(config & JC42_CFG_EVENT_LOCK))
375 mode |= 0200;
376 break;
377 case hwmon_temp_crit:
378 if (!(config & JC42_CFG_TCRIT_LOCK))
379 mode |= 0200;
380 break;
381 case hwmon_temp_crit_hyst:
382 if (!(config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK)))
383 mode |= 0200;
384 break;
385 case hwmon_temp_input:
386 case hwmon_temp_max_hyst:
387 case hwmon_temp_min_alarm:
388 case hwmon_temp_max_alarm:
389 case hwmon_temp_crit_alarm:
390 break;
391 default:
392 mode = 0;
393 break;
394 }
395 return mode;
396 }
397
398 /* Return 0 if detection is successful, -ENODEV otherwise */
jc42_detect(struct i2c_client * client,struct i2c_board_info * info)399 static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info)
400 {
401 struct i2c_adapter *adapter = client->adapter;
402 int i, config, cap, manid, devid;
403
404 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
405 I2C_FUNC_SMBUS_WORD_DATA))
406 return -ENODEV;
407
408 cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP);
409 config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG);
410 manid = i2c_smbus_read_word_swapped(client, JC42_REG_MANID);
411 devid = i2c_smbus_read_word_swapped(client, JC42_REG_DEVICEID);
412
413 if (cap < 0 || config < 0 || manid < 0 || devid < 0)
414 return -ENODEV;
415
416 if ((cap & 0xff00) || (config & 0xf820))
417 return -ENODEV;
418
419 if ((devid & TSE2004_DEVID_MASK) == TSE2004_DEVID &&
420 (cap & 0x00e7) != 0x00e7)
421 return -ENODEV;
422
423 for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
424 struct jc42_chips *chip = &jc42_chips[i];
425 if (manid == chip->manid &&
426 (devid & chip->devid_mask) == chip->devid) {
427 strscpy(info->type, "jc42", I2C_NAME_SIZE);
428 return 0;
429 }
430 }
431 return -ENODEV;
432 }
433
434 static const struct hwmon_channel_info * const jc42_info[] = {
435 HWMON_CHANNEL_INFO(chip,
436 HWMON_C_REGISTER_TZ | HWMON_C_UPDATE_INTERVAL),
437 HWMON_CHANNEL_INFO(temp,
438 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
439 HWMON_T_CRIT | HWMON_T_MAX_HYST |
440 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
441 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM),
442 NULL
443 };
444
445 static const struct hwmon_ops jc42_hwmon_ops = {
446 .is_visible = jc42_is_visible,
447 .read = jc42_read,
448 .write = jc42_write,
449 };
450
451 static const struct hwmon_chip_info jc42_chip_info = {
452 .ops = &jc42_hwmon_ops,
453 .info = jc42_info,
454 };
455
jc42_readable_reg(struct device * dev,unsigned int reg)456 static bool jc42_readable_reg(struct device *dev, unsigned int reg)
457 {
458 return (reg >= JC42_REG_CAP && reg <= JC42_REG_DEVICEID) ||
459 reg == JC42_REG_SMBUS;
460 }
461
jc42_writable_reg(struct device * dev,unsigned int reg)462 static bool jc42_writable_reg(struct device *dev, unsigned int reg)
463 {
464 return (reg >= JC42_REG_CONFIG && reg <= JC42_REG_TEMP_CRITICAL) ||
465 reg == JC42_REG_SMBUS;
466 }
467
jc42_volatile_reg(struct device * dev,unsigned int reg)468 static bool jc42_volatile_reg(struct device *dev, unsigned int reg)
469 {
470 return reg == JC42_REG_CONFIG || reg == JC42_REG_TEMP;
471 }
472
473 static const struct regmap_config jc42_regmap_config = {
474 .reg_bits = 8,
475 .val_bits = 16,
476 .val_format_endian = REGMAP_ENDIAN_BIG,
477 .max_register = JC42_REG_SMBUS,
478 .writeable_reg = jc42_writable_reg,
479 .readable_reg = jc42_readable_reg,
480 .volatile_reg = jc42_volatile_reg,
481 .cache_type = REGCACHE_MAPLE,
482 };
483
jc42_probe(struct i2c_client * client)484 static int jc42_probe(struct i2c_client *client)
485 {
486 struct device *dev = &client->dev;
487 struct device *hwmon_dev;
488 unsigned int config, cap;
489 struct jc42_data *data;
490 int ret;
491
492 data = devm_kzalloc(dev, sizeof(struct jc42_data), GFP_KERNEL);
493 if (!data)
494 return -ENOMEM;
495
496 data->regmap = devm_regmap_init_i2c(client, &jc42_regmap_config);
497 if (IS_ERR(data->regmap))
498 return PTR_ERR(data->regmap);
499
500 i2c_set_clientdata(client, data);
501 mutex_init(&data->update_lock);
502
503 ret = regmap_read(data->regmap, JC42_REG_CAP, &cap);
504 if (ret)
505 return ret;
506
507 data->extended = !!(cap & JC42_CAP_RANGE);
508
509 if (device_property_read_bool(dev, "smbus-timeout-disable")) {
510 /*
511 * Not all chips support this register, but from a
512 * quick read of various datasheets no chip appears
513 * incompatible with the below attempt to disable
514 * the timeout. And the whole thing is opt-in...
515 */
516 ret = regmap_set_bits(data->regmap, JC42_REG_SMBUS,
517 SMBUS_STMOUT);
518 if (ret)
519 return ret;
520 }
521
522 ret = regmap_read(data->regmap, JC42_REG_CONFIG, &config);
523 if (ret)
524 return ret;
525
526 data->orig_config = config;
527 if (config & JC42_CFG_SHUTDOWN) {
528 config &= ~JC42_CFG_SHUTDOWN;
529 regmap_write(data->regmap, JC42_REG_CONFIG, config);
530 }
531 data->config = config;
532
533 hwmon_dev = devm_hwmon_device_register_with_info(dev, "jc42",
534 data, &jc42_chip_info,
535 NULL);
536 return PTR_ERR_OR_ZERO(hwmon_dev);
537 }
538
jc42_remove(struct i2c_client * client)539 static void jc42_remove(struct i2c_client *client)
540 {
541 struct jc42_data *data = i2c_get_clientdata(client);
542
543 /* Restore original configuration except hysteresis */
544 if ((data->config & ~JC42_CFG_HYST_MASK) !=
545 (data->orig_config & ~JC42_CFG_HYST_MASK)) {
546 int config;
547
548 config = (data->orig_config & ~JC42_CFG_HYST_MASK)
549 | (data->config & JC42_CFG_HYST_MASK);
550 regmap_write(data->regmap, JC42_REG_CONFIG, config);
551 }
552 }
553
554 #ifdef CONFIG_PM
555
jc42_suspend(struct device * dev)556 static int jc42_suspend(struct device *dev)
557 {
558 struct jc42_data *data = dev_get_drvdata(dev);
559
560 data->config |= JC42_CFG_SHUTDOWN;
561 regmap_write(data->regmap, JC42_REG_CONFIG, data->config);
562
563 regcache_cache_only(data->regmap, true);
564 regcache_mark_dirty(data->regmap);
565
566 return 0;
567 }
568
jc42_resume(struct device * dev)569 static int jc42_resume(struct device *dev)
570 {
571 struct jc42_data *data = dev_get_drvdata(dev);
572
573 regcache_cache_only(data->regmap, false);
574
575 data->config &= ~JC42_CFG_SHUTDOWN;
576 regmap_write(data->regmap, JC42_REG_CONFIG, data->config);
577
578 /* Restore cached register values to hardware */
579 return regcache_sync(data->regmap);
580 }
581
582 static const struct dev_pm_ops jc42_dev_pm_ops = {
583 .suspend = jc42_suspend,
584 .resume = jc42_resume,
585 };
586
587 #define JC42_DEV_PM_OPS (&jc42_dev_pm_ops)
588 #else
589 #define JC42_DEV_PM_OPS NULL
590 #endif /* CONFIG_PM */
591
592 static const struct i2c_device_id jc42_id[] = {
593 { "jc42" },
594 { }
595 };
596 MODULE_DEVICE_TABLE(i2c, jc42_id);
597
598 #ifdef CONFIG_OF
599 static const struct of_device_id jc42_of_ids[] = {
600 { .compatible = "jedec,jc-42.4-temp", },
601 { }
602 };
603 MODULE_DEVICE_TABLE(of, jc42_of_ids);
604 #endif
605
606 static struct i2c_driver jc42_driver = {
607 .class = I2C_CLASS_HWMON,
608 .driver = {
609 .name = "jc42",
610 .pm = JC42_DEV_PM_OPS,
611 .of_match_table = of_match_ptr(jc42_of_ids),
612 },
613 .probe = jc42_probe,
614 .remove = jc42_remove,
615 .id_table = jc42_id,
616 .detect = jc42_detect,
617 .address_list = normal_i2c,
618 };
619
620 module_i2c_driver(jc42_driver);
621
622 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
623 MODULE_DESCRIPTION("JC42 driver");
624 MODULE_LICENSE("GPL");
625