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
35 /* Addresses to scan */
36 static const unsigned short normal_i2c[] = {
37 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END };
38
39 /* JC42 registers. All registers are 16 bit. */
40 #define JC42_REG_CAP 0x00
41 #define JC42_REG_CONFIG 0x01
42 #define JC42_REG_TEMP_UPPER 0x02
43 #define JC42_REG_TEMP_LOWER 0x03
44 #define JC42_REG_TEMP_CRITICAL 0x04
45 #define JC42_REG_TEMP 0x05
46 #define JC42_REG_MANID 0x06
47 #define JC42_REG_DEVICEID 0x07
48
49 /* Status bits in temperature register */
50 #define JC42_ALARM_CRIT_BIT 15
51 #define JC42_ALARM_MAX_BIT 14
52 #define JC42_ALARM_MIN_BIT 13
53
54 /* Configuration register defines */
55 #define JC42_CFG_CRIT_ONLY (1 << 2)
56 #define JC42_CFG_TCRIT_LOCK (1 << 6)
57 #define JC42_CFG_EVENT_LOCK (1 << 7)
58 #define JC42_CFG_SHUTDOWN (1 << 8)
59 #define JC42_CFG_HYST_SHIFT 9
60 #define JC42_CFG_HYST_MASK 0x03
61
62 /* Capabilities */
63 #define JC42_CAP_RANGE (1 << 2)
64
65 /* Manufacturer IDs */
66 #define ADT_MANID 0x11d4 /* Analog Devices */
67 #define ATMEL_MANID 0x001f /* Atmel */
68 #define MAX_MANID 0x004d /* Maxim */
69 #define IDT_MANID 0x00b3 /* IDT */
70 #define MCP_MANID 0x0054 /* Microchip */
71 #define NXP_MANID 0x1131 /* NXP Semiconductors */
72 #define ONS_MANID 0x1b09 /* ON Semiconductor */
73 #define STM_MANID 0x104a /* ST Microelectronics */
74
75 /* Supported chips */
76
77 /* Analog Devices */
78 #define ADT7408_DEVID 0x0801
79 #define ADT7408_DEVID_MASK 0xffff
80
81 /* Atmel */
82 #define AT30TS00_DEVID 0x8201
83 #define AT30TS00_DEVID_MASK 0xffff
84
85 /* IDT */
86 #define TS3000B3_DEVID 0x2903 /* Also matches TSE2002B3 */
87 #define TS3000B3_DEVID_MASK 0xffff
88
89 #define TS3000GB2_DEVID 0x2912 /* Also matches TSE2002GB2 */
90 #define TS3000GB2_DEVID_MASK 0xffff
91
92 /* Maxim */
93 #define MAX6604_DEVID 0x3e00
94 #define MAX6604_DEVID_MASK 0xffff
95
96 /* Microchip */
97 #define MCP9804_DEVID 0x0200
98 #define MCP9804_DEVID_MASK 0xfffc
99
100 #define MCP98242_DEVID 0x2000
101 #define MCP98242_DEVID_MASK 0xfffc
102
103 #define MCP98243_DEVID 0x2100
104 #define MCP98243_DEVID_MASK 0xfffc
105
106 #define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */
107 #define MCP9843_DEVID_MASK 0xfffe
108
109 /* NXP */
110 #define SE97_DEVID 0xa200
111 #define SE97_DEVID_MASK 0xfffc
112
113 #define SE98_DEVID 0xa100
114 #define SE98_DEVID_MASK 0xfffc
115
116 /* ON Semiconductor */
117 #define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */
118 #define CAT6095_DEVID_MASK 0xffe0
119
120 /* ST Microelectronics */
121 #define STTS424_DEVID 0x0101
122 #define STTS424_DEVID_MASK 0xffff
123
124 #define STTS424E_DEVID 0x0000
125 #define STTS424E_DEVID_MASK 0xfffe
126
127 #define STTS2002_DEVID 0x0300
128 #define STTS2002_DEVID_MASK 0xffff
129
130 #define STTS3000_DEVID 0x0200
131 #define STTS3000_DEVID_MASK 0xffff
132
133 static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 };
134
135 struct jc42_chips {
136 u16 manid;
137 u16 devid;
138 u16 devid_mask;
139 };
140
141 static struct jc42_chips jc42_chips[] = {
142 { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK },
143 { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK },
144 { IDT_MANID, TS3000B3_DEVID, TS3000B3_DEVID_MASK },
145 { IDT_MANID, TS3000GB2_DEVID, TS3000GB2_DEVID_MASK },
146 { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK },
147 { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK },
148 { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK },
149 { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK },
150 { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK },
151 { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK },
152 { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK },
153 { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK },
154 { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK },
155 { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK },
156 { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK },
157 { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK },
158 };
159
160 /* Each client has this additional data */
161 struct jc42_data {
162 struct device *hwmon_dev;
163 struct mutex update_lock; /* protect register access */
164 bool extended; /* true if extended range supported */
165 bool valid;
166 unsigned long last_updated; /* In jiffies */
167 u16 orig_config; /* original configuration */
168 u16 config; /* current configuration */
169 u16 temp_input; /* Temperatures */
170 u16 temp_crit;
171 u16 temp_min;
172 u16 temp_max;
173 };
174
175 static int jc42_probe(struct i2c_client *client,
176 const struct i2c_device_id *id);
177 static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info);
178 static int jc42_remove(struct i2c_client *client);
179
180 static struct jc42_data *jc42_update_device(struct device *dev);
181
182 static const struct i2c_device_id jc42_id[] = {
183 { "adt7408", 0 },
184 { "at30ts00", 0 },
185 { "cat94ts02", 0 },
186 { "cat6095", 0 },
187 { "jc42", 0 },
188 { "max6604", 0 },
189 { "mcp9804", 0 },
190 { "mcp9805", 0 },
191 { "mcp98242", 0 },
192 { "mcp98243", 0 },
193 { "mcp9843", 0 },
194 { "se97", 0 },
195 { "se97b", 0 },
196 { "se98", 0 },
197 { "stts424", 0 },
198 { "stts2002", 0 },
199 { "stts3000", 0 },
200 { "tse2002", 0 },
201 { "ts3000", 0 },
202 { }
203 };
204 MODULE_DEVICE_TABLE(i2c, jc42_id);
205
206 #ifdef CONFIG_PM
207
jc42_suspend(struct device * dev)208 static int jc42_suspend(struct device *dev)
209 {
210 struct i2c_client *client = to_i2c_client(dev);
211 struct jc42_data *data = i2c_get_clientdata(client);
212
213 data->config |= JC42_CFG_SHUTDOWN;
214 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config);
215 return 0;
216 }
217
jc42_resume(struct device * dev)218 static int jc42_resume(struct device *dev)
219 {
220 struct i2c_client *client = to_i2c_client(dev);
221 struct jc42_data *data = i2c_get_clientdata(client);
222
223 data->config &= ~JC42_CFG_SHUTDOWN;
224 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config);
225 return 0;
226 }
227
228 static const struct dev_pm_ops jc42_dev_pm_ops = {
229 .suspend = jc42_suspend,
230 .resume = jc42_resume,
231 };
232
233 #define JC42_DEV_PM_OPS (&jc42_dev_pm_ops)
234 #else
235 #define JC42_DEV_PM_OPS NULL
236 #endif /* CONFIG_PM */
237
238 /* This is the driver that will be inserted */
239 static struct i2c_driver jc42_driver = {
240 .class = I2C_CLASS_SPD,
241 .driver = {
242 .name = "jc42",
243 .pm = JC42_DEV_PM_OPS,
244 },
245 .probe = jc42_probe,
246 .remove = jc42_remove,
247 .id_table = jc42_id,
248 .detect = jc42_detect,
249 .address_list = normal_i2c,
250 };
251
252 #define JC42_TEMP_MIN_EXTENDED (-40000)
253 #define JC42_TEMP_MIN 0
254 #define JC42_TEMP_MAX 125000
255
jc42_temp_to_reg(int temp,bool extended)256 static u16 jc42_temp_to_reg(int temp, bool extended)
257 {
258 int ntemp = SENSORS_LIMIT(temp,
259 extended ? JC42_TEMP_MIN_EXTENDED :
260 JC42_TEMP_MIN, JC42_TEMP_MAX);
261
262 /* convert from 0.001 to 0.0625 resolution */
263 return (ntemp * 2 / 125) & 0x1fff;
264 }
265
jc42_temp_from_reg(s16 reg)266 static int jc42_temp_from_reg(s16 reg)
267 {
268 reg &= 0x1fff;
269
270 /* sign extend register */
271 if (reg & 0x1000)
272 reg |= 0xf000;
273
274 /* convert from 0.0625 to 0.001 resolution */
275 return reg * 125 / 2;
276 }
277
278 /* sysfs stuff */
279
280 /* read routines for temperature limits */
281 #define show(value) \
282 static ssize_t show_##value(struct device *dev, \
283 struct device_attribute *attr, \
284 char *buf) \
285 { \
286 struct jc42_data *data = jc42_update_device(dev); \
287 if (IS_ERR(data)) \
288 return PTR_ERR(data); \
289 return sprintf(buf, "%d\n", jc42_temp_from_reg(data->value)); \
290 }
291
292 show(temp_input);
293 show(temp_crit);
294 show(temp_min);
295 show(temp_max);
296
297 /* read routines for hysteresis values */
show_temp_crit_hyst(struct device * dev,struct device_attribute * attr,char * buf)298 static ssize_t show_temp_crit_hyst(struct device *dev,
299 struct device_attribute *attr, char *buf)
300 {
301 struct jc42_data *data = jc42_update_device(dev);
302 int temp, hyst;
303
304 if (IS_ERR(data))
305 return PTR_ERR(data);
306
307 temp = jc42_temp_from_reg(data->temp_crit);
308 hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
309 & JC42_CFG_HYST_MASK];
310 return sprintf(buf, "%d\n", temp - hyst);
311 }
312
show_temp_max_hyst(struct device * dev,struct device_attribute * attr,char * buf)313 static ssize_t show_temp_max_hyst(struct device *dev,
314 struct device_attribute *attr, char *buf)
315 {
316 struct jc42_data *data = jc42_update_device(dev);
317 int temp, hyst;
318
319 if (IS_ERR(data))
320 return PTR_ERR(data);
321
322 temp = jc42_temp_from_reg(data->temp_max);
323 hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
324 & JC42_CFG_HYST_MASK];
325 return sprintf(buf, "%d\n", temp - hyst);
326 }
327
328 /* write routines */
329 #define set(value, reg) \
330 static ssize_t set_##value(struct device *dev, \
331 struct device_attribute *attr, \
332 const char *buf, size_t count) \
333 { \
334 struct i2c_client *client = to_i2c_client(dev); \
335 struct jc42_data *data = i2c_get_clientdata(client); \
336 int err, ret = count; \
337 long val; \
338 if (kstrtol(buf, 10, &val) < 0) \
339 return -EINVAL; \
340 mutex_lock(&data->update_lock); \
341 data->value = jc42_temp_to_reg(val, data->extended); \
342 err = i2c_smbus_write_word_swapped(client, reg, data->value); \
343 if (err < 0) \
344 ret = err; \
345 mutex_unlock(&data->update_lock); \
346 return ret; \
347 }
348
349 set(temp_min, JC42_REG_TEMP_LOWER);
350 set(temp_max, JC42_REG_TEMP_UPPER);
351 set(temp_crit, JC42_REG_TEMP_CRITICAL);
352
353 /* JC42.4 compliant chips only support four hysteresis values.
354 * Pick best choice and go from there. */
set_temp_crit_hyst(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)355 static ssize_t set_temp_crit_hyst(struct device *dev,
356 struct device_attribute *attr,
357 const char *buf, size_t count)
358 {
359 struct i2c_client *client = to_i2c_client(dev);
360 struct jc42_data *data = i2c_get_clientdata(client);
361 unsigned long val;
362 int diff, hyst;
363 int err;
364 int ret = count;
365
366 if (kstrtoul(buf, 10, &val) < 0)
367 return -EINVAL;
368
369 diff = jc42_temp_from_reg(data->temp_crit) - val;
370 hyst = 0;
371 if (diff > 0) {
372 if (diff < 2250)
373 hyst = 1; /* 1.5 degrees C */
374 else if (diff < 4500)
375 hyst = 2; /* 3.0 degrees C */
376 else
377 hyst = 3; /* 6.0 degrees C */
378 }
379
380 mutex_lock(&data->update_lock);
381 data->config = (data->config
382 & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT))
383 | (hyst << JC42_CFG_HYST_SHIFT);
384 err = i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG,
385 data->config);
386 if (err < 0)
387 ret = err;
388 mutex_unlock(&data->update_lock);
389 return ret;
390 }
391
show_alarm(struct device * dev,struct device_attribute * attr,char * buf)392 static ssize_t show_alarm(struct device *dev,
393 struct device_attribute *attr, char *buf)
394 {
395 u16 bit = to_sensor_dev_attr(attr)->index;
396 struct jc42_data *data = jc42_update_device(dev);
397 u16 val;
398
399 if (IS_ERR(data))
400 return PTR_ERR(data);
401
402 val = data->temp_input;
403 if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY))
404 val = 0;
405 return sprintf(buf, "%u\n", (val >> bit) & 1);
406 }
407
408 static DEVICE_ATTR(temp1_input, S_IRUGO,
409 show_temp_input, NULL);
410 static DEVICE_ATTR(temp1_crit, S_IRUGO,
411 show_temp_crit, set_temp_crit);
412 static DEVICE_ATTR(temp1_min, S_IRUGO,
413 show_temp_min, set_temp_min);
414 static DEVICE_ATTR(temp1_max, S_IRUGO,
415 show_temp_max, set_temp_max);
416
417 static DEVICE_ATTR(temp1_crit_hyst, S_IRUGO,
418 show_temp_crit_hyst, set_temp_crit_hyst);
419 static DEVICE_ATTR(temp1_max_hyst, S_IRUGO,
420 show_temp_max_hyst, NULL);
421
422 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
423 JC42_ALARM_CRIT_BIT);
424 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
425 JC42_ALARM_MIN_BIT);
426 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
427 JC42_ALARM_MAX_BIT);
428
429 static struct attribute *jc42_attributes[] = {
430 &dev_attr_temp1_input.attr,
431 &dev_attr_temp1_crit.attr,
432 &dev_attr_temp1_min.attr,
433 &dev_attr_temp1_max.attr,
434 &dev_attr_temp1_crit_hyst.attr,
435 &dev_attr_temp1_max_hyst.attr,
436 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
437 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
438 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
439 NULL
440 };
441
jc42_attribute_mode(struct kobject * kobj,struct attribute * attr,int index)442 static umode_t jc42_attribute_mode(struct kobject *kobj,
443 struct attribute *attr, int index)
444 {
445 struct device *dev = container_of(kobj, struct device, kobj);
446 struct i2c_client *client = to_i2c_client(dev);
447 struct jc42_data *data = i2c_get_clientdata(client);
448 unsigned int config = data->config;
449 bool readonly;
450
451 if (attr == &dev_attr_temp1_crit.attr)
452 readonly = config & JC42_CFG_TCRIT_LOCK;
453 else if (attr == &dev_attr_temp1_min.attr ||
454 attr == &dev_attr_temp1_max.attr)
455 readonly = config & JC42_CFG_EVENT_LOCK;
456 else if (attr == &dev_attr_temp1_crit_hyst.attr)
457 readonly = config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK);
458 else
459 readonly = true;
460
461 return S_IRUGO | (readonly ? 0 : S_IWUSR);
462 }
463
464 static const struct attribute_group jc42_group = {
465 .attrs = jc42_attributes,
466 .is_visible = jc42_attribute_mode,
467 };
468
469 /* Return 0 if detection is successful, -ENODEV otherwise */
jc42_detect(struct i2c_client * new_client,struct i2c_board_info * info)470 static int jc42_detect(struct i2c_client *new_client,
471 struct i2c_board_info *info)
472 {
473 struct i2c_adapter *adapter = new_client->adapter;
474 int i, config, cap, manid, devid;
475
476 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
477 I2C_FUNC_SMBUS_WORD_DATA))
478 return -ENODEV;
479
480 cap = i2c_smbus_read_word_swapped(new_client, JC42_REG_CAP);
481 config = i2c_smbus_read_word_swapped(new_client, JC42_REG_CONFIG);
482 manid = i2c_smbus_read_word_swapped(new_client, JC42_REG_MANID);
483 devid = i2c_smbus_read_word_swapped(new_client, JC42_REG_DEVICEID);
484
485 if (cap < 0 || config < 0 || manid < 0 || devid < 0)
486 return -ENODEV;
487
488 if ((cap & 0xff00) || (config & 0xf800))
489 return -ENODEV;
490
491 for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
492 struct jc42_chips *chip = &jc42_chips[i];
493 if (manid == chip->manid &&
494 (devid & chip->devid_mask) == chip->devid) {
495 strlcpy(info->type, "jc42", I2C_NAME_SIZE);
496 return 0;
497 }
498 }
499 return -ENODEV;
500 }
501
jc42_probe(struct i2c_client * new_client,const struct i2c_device_id * id)502 static int jc42_probe(struct i2c_client *new_client,
503 const struct i2c_device_id *id)
504 {
505 struct jc42_data *data;
506 int config, cap, err;
507
508 data = kzalloc(sizeof(struct jc42_data), GFP_KERNEL);
509 if (!data) {
510 err = -ENOMEM;
511 goto exit;
512 }
513
514 i2c_set_clientdata(new_client, data);
515 mutex_init(&data->update_lock);
516
517 cap = i2c_smbus_read_word_swapped(new_client, JC42_REG_CAP);
518 if (cap < 0) {
519 err = -EINVAL;
520 goto exit_free;
521 }
522 data->extended = !!(cap & JC42_CAP_RANGE);
523
524 config = i2c_smbus_read_word_swapped(new_client, JC42_REG_CONFIG);
525 if (config < 0) {
526 err = -EINVAL;
527 goto exit_free;
528 }
529 data->orig_config = config;
530 if (config & JC42_CFG_SHUTDOWN) {
531 config &= ~JC42_CFG_SHUTDOWN;
532 i2c_smbus_write_word_swapped(new_client, JC42_REG_CONFIG,
533 config);
534 }
535 data->config = config;
536
537 /* Register sysfs hooks */
538 err = sysfs_create_group(&new_client->dev.kobj, &jc42_group);
539 if (err)
540 goto exit_free;
541
542 data->hwmon_dev = hwmon_device_register(&new_client->dev);
543 if (IS_ERR(data->hwmon_dev)) {
544 err = PTR_ERR(data->hwmon_dev);
545 goto exit_remove;
546 }
547
548 return 0;
549
550 exit_remove:
551 sysfs_remove_group(&new_client->dev.kobj, &jc42_group);
552 exit_free:
553 kfree(data);
554 exit:
555 return err;
556 }
557
jc42_remove(struct i2c_client * client)558 static int jc42_remove(struct i2c_client *client)
559 {
560 struct jc42_data *data = i2c_get_clientdata(client);
561 hwmon_device_unregister(data->hwmon_dev);
562 sysfs_remove_group(&client->dev.kobj, &jc42_group);
563 if (data->config != data->orig_config)
564 i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG,
565 data->orig_config);
566 kfree(data);
567 return 0;
568 }
569
jc42_update_device(struct device * dev)570 static struct jc42_data *jc42_update_device(struct device *dev)
571 {
572 struct i2c_client *client = to_i2c_client(dev);
573 struct jc42_data *data = i2c_get_clientdata(client);
574 struct jc42_data *ret = data;
575 int val;
576
577 mutex_lock(&data->update_lock);
578
579 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
580 val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP);
581 if (val < 0) {
582 ret = ERR_PTR(val);
583 goto abort;
584 }
585 data->temp_input = val;
586
587 val = i2c_smbus_read_word_swapped(client,
588 JC42_REG_TEMP_CRITICAL);
589 if (val < 0) {
590 ret = ERR_PTR(val);
591 goto abort;
592 }
593 data->temp_crit = val;
594
595 val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_LOWER);
596 if (val < 0) {
597 ret = ERR_PTR(val);
598 goto abort;
599 }
600 data->temp_min = val;
601
602 val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_UPPER);
603 if (val < 0) {
604 ret = ERR_PTR(val);
605 goto abort;
606 }
607 data->temp_max = val;
608
609 data->last_updated = jiffies;
610 data->valid = true;
611 }
612 abort:
613 mutex_unlock(&data->update_lock);
614 return ret;
615 }
616
sensors_jc42_init(void)617 static int __init sensors_jc42_init(void)
618 {
619 return i2c_add_driver(&jc42_driver);
620 }
621
sensors_jc42_exit(void)622 static void __exit sensors_jc42_exit(void)
623 {
624 i2c_del_driver(&jc42_driver);
625 }
626
627 MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
628 MODULE_DESCRIPTION("JC42 driver");
629 MODULE_LICENSE("GPL");
630
631 module_init(sensors_jc42_init);
632 module_exit(sensors_jc42_exit);
633