treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / hwmon / ftsteutates.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Support for the FTS Systemmonitoring Chip "Teutates"
4  *
5  * Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
6  *                Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
7  */
8 #include <linux/err.h>
9 #include <linux/fs.h>
10 #include <linux/hwmon.h>
11 #include <linux/hwmon-sysfs.h>
12 #include <linux/i2c.h>
13 #include <linux/init.h>
14 #include <linux/jiffies.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/slab.h>
18 #include <linux/sysfs.h>
19 #include <linux/uaccess.h>
20 #include <linux/watchdog.h>
21
22 #define FTS_DEVICE_ID_REG               0x0000
23 #define FTS_DEVICE_REVISION_REG         0x0001
24 #define FTS_DEVICE_STATUS_REG           0x0004
25 #define FTS_SATELLITE_STATUS_REG        0x0005
26 #define FTS_EVENT_STATUS_REG            0x0006
27 #define FTS_GLOBAL_CONTROL_REG          0x0007
28
29 #define FTS_DEVICE_DETECT_REG_1         0x0C
30 #define FTS_DEVICE_DETECT_REG_2         0x0D
31 #define FTS_DEVICE_DETECT_REG_3         0x0E
32
33 #define FTS_SENSOR_EVENT_REG            0x0010
34
35 #define FTS_FAN_EVENT_REG               0x0014
36 #define FTS_FAN_PRESENT_REG             0x0015
37
38 #define FTS_POWER_ON_TIME_COUNTER_A     0x007A
39 #define FTS_POWER_ON_TIME_COUNTER_B     0x007B
40 #define FTS_POWER_ON_TIME_COUNTER_C     0x007C
41
42 #define FTS_PAGE_SELECT_REG             0x007F
43
44 #define FTS_WATCHDOG_TIME_PRESET        0x000B
45 #define FTS_WATCHDOG_CONTROL            0x5081
46
47 #define FTS_NO_FAN_SENSORS              0x08
48 #define FTS_NO_TEMP_SENSORS             0x10
49 #define FTS_NO_VOLT_SENSORS             0x04
50
51 static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
52
53 static const struct i2c_device_id fts_id[] = {
54         { "ftsteutates", 0 },
55         { }
56 };
57 MODULE_DEVICE_TABLE(i2c, fts_id);
58
59 enum WATCHDOG_RESOLUTION {
60         seconds = 1,
61         minutes = 60
62 };
63
64 struct fts_data {
65         struct i2c_client *client;
66         /* update sensor data lock */
67         struct mutex update_lock;
68         /* read/write register lock */
69         struct mutex access_lock;
70         unsigned long last_updated; /* in jiffies */
71         struct watchdog_device wdd;
72         enum WATCHDOG_RESOLUTION resolution;
73         bool valid; /* false until following fields are valid */
74
75         u8 volt[FTS_NO_VOLT_SENSORS];
76
77         u8 temp_input[FTS_NO_TEMP_SENSORS];
78         u8 temp_alarm;
79
80         u8 fan_present;
81         u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
82         u8 fan_source[FTS_NO_FAN_SENSORS];
83         u8 fan_alarm;
84 };
85
86 #define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
87 #define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
88 #define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
89
90 #define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
91 #define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
92
93 #define FTS_REG_VOLT(idx) ((idx) + 0x18)
94
95 /*****************************************************************************/
96 /* I2C Helper functions                                                      */
97 /*****************************************************************************/
98 static int fts_read_byte(struct i2c_client *client, unsigned short reg)
99 {
100         int ret;
101         unsigned char page = reg >> 8;
102         struct fts_data *data = dev_get_drvdata(&client->dev);
103
104         mutex_lock(&data->access_lock);
105
106         dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
107         ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
108         if (ret < 0)
109                 goto error;
110
111         reg &= 0xFF;
112         ret = i2c_smbus_read_byte_data(client, reg);
113         dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
114
115 error:
116         mutex_unlock(&data->access_lock);
117         return ret;
118 }
119
120 static int fts_write_byte(struct i2c_client *client, unsigned short reg,
121                           unsigned char value)
122 {
123         int ret;
124         unsigned char page = reg >> 8;
125         struct fts_data *data = dev_get_drvdata(&client->dev);
126
127         mutex_lock(&data->access_lock);
128
129         dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
130         ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
131         if (ret < 0)
132                 goto error;
133
134         reg &= 0xFF;
135         dev_dbg(&client->dev,
136                 "write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
137         ret = i2c_smbus_write_byte_data(client, reg, value);
138
139 error:
140         mutex_unlock(&data->access_lock);
141         return ret;
142 }
143
144 /*****************************************************************************/
145 /* Data Updater Helper function                                              */
146 /*****************************************************************************/
147 static int fts_update_device(struct fts_data *data)
148 {
149         int i;
150         int err = 0;
151
152         mutex_lock(&data->update_lock);
153         if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
154                 goto exit;
155
156         err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
157         if (err < 0)
158                 goto exit;
159
160         data->valid = !!(err & 0x02); /* Data not ready yet */
161         if (unlikely(!data->valid)) {
162                 err = -EAGAIN;
163                 goto exit;
164         }
165
166         err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
167         if (err < 0)
168                 goto exit;
169         data->fan_present = err;
170
171         err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
172         if (err < 0)
173                 goto exit;
174         data->fan_alarm = err;
175
176         for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
177                 if (data->fan_present & BIT(i)) {
178                         err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
179                         if (err < 0)
180                                 goto exit;
181                         data->fan_input[i] = err;
182
183                         err = fts_read_byte(data->client,
184                                             FTS_REG_FAN_SOURCE(i));
185                         if (err < 0)
186                                 goto exit;
187                         data->fan_source[i] = err;
188                 } else {
189                         data->fan_input[i] = 0;
190                         data->fan_source[i] = 0;
191                 }
192         }
193
194         err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
195         if (err < 0)
196                 goto exit;
197         data->temp_alarm = err;
198
199         for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
200                 err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
201                 if (err < 0)
202                         goto exit;
203                 data->temp_input[i] = err;
204         }
205
206         for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
207                 err = fts_read_byte(data->client, FTS_REG_VOLT(i));
208                 if (err < 0)
209                         goto exit;
210                 data->volt[i] = err;
211         }
212         data->last_updated = jiffies;
213         err = 0;
214 exit:
215         mutex_unlock(&data->update_lock);
216         return err;
217 }
218
219 /*****************************************************************************/
220 /* Watchdog functions                                                        */
221 /*****************************************************************************/
222 static int fts_wd_set_resolution(struct fts_data *data,
223                                  enum WATCHDOG_RESOLUTION resolution)
224 {
225         int ret;
226
227         if (data->resolution == resolution)
228                 return 0;
229
230         ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
231         if (ret < 0)
232                 return ret;
233
234         if ((resolution == seconds && ret & BIT(1)) ||
235             (resolution == minutes && (ret & BIT(1)) == 0)) {
236                 data->resolution = resolution;
237                 return 0;
238         }
239
240         if (resolution == seconds)
241                 ret |= BIT(1);
242         else
243                 ret &= ~BIT(1);
244
245         ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
246         if (ret < 0)
247                 return ret;
248
249         data->resolution = resolution;
250         return ret;
251 }
252
253 static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
254 {
255         struct fts_data *data;
256         enum WATCHDOG_RESOLUTION resolution = seconds;
257         int ret;
258
259         data = watchdog_get_drvdata(wdd);
260         /* switch watchdog resolution to minutes if timeout does not fit
261          * into a byte
262          */
263         if (timeout > 0xFF) {
264                 timeout = DIV_ROUND_UP(timeout, 60) * 60;
265                 resolution = minutes;
266         }
267
268         ret = fts_wd_set_resolution(data, resolution);
269         if (ret < 0)
270                 return ret;
271
272         wdd->timeout = timeout;
273         return 0;
274 }
275
276 static int fts_wd_start(struct watchdog_device *wdd)
277 {
278         struct fts_data *data = watchdog_get_drvdata(wdd);
279
280         return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
281                               wdd->timeout / (u8)data->resolution);
282 }
283
284 static int fts_wd_stop(struct watchdog_device *wdd)
285 {
286         struct fts_data *data;
287
288         data = watchdog_get_drvdata(wdd);
289         return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
290 }
291
292 static const struct watchdog_info fts_wd_info = {
293         .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
294         .identity = "FTS Teutates Hardware Watchdog",
295 };
296
297 static const struct watchdog_ops fts_wd_ops = {
298         .owner = THIS_MODULE,
299         .start = fts_wd_start,
300         .stop = fts_wd_stop,
301         .set_timeout = fts_wd_set_timeout,
302 };
303
304 static int fts_watchdog_init(struct fts_data *data)
305 {
306         int timeout, ret;
307
308         watchdog_set_drvdata(&data->wdd, data);
309
310         timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
311         if (timeout < 0)
312                 return timeout;
313
314         /* watchdog not running, set timeout to a default of 60 sec. */
315         if (timeout == 0) {
316                 ret = fts_wd_set_resolution(data, seconds);
317                 if (ret < 0)
318                         return ret;
319                 data->wdd.timeout = 60;
320         } else {
321                 ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
322                 if (ret < 0)
323                         return ret;
324
325                 data->resolution = ret & BIT(1) ? seconds : minutes;
326                 data->wdd.timeout = timeout * (u8)data->resolution;
327                 set_bit(WDOG_HW_RUNNING, &data->wdd.status);
328         }
329
330         /* Register our watchdog part */
331         data->wdd.info = &fts_wd_info;
332         data->wdd.ops = &fts_wd_ops;
333         data->wdd.parent = &data->client->dev;
334         data->wdd.min_timeout = 1;
335
336         /* max timeout 255 minutes. */
337         data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
338
339         return watchdog_register_device(&data->wdd);
340 }
341
342 /*****************************************************************************/
343 /* SysFS handler functions                                                   */
344 /*****************************************************************************/
345 static ssize_t in_value_show(struct device *dev,
346                              struct device_attribute *devattr, char *buf)
347 {
348         struct fts_data *data = dev_get_drvdata(dev);
349         int index = to_sensor_dev_attr(devattr)->index;
350         int err;
351
352         err = fts_update_device(data);
353         if (err < 0)
354                 return err;
355
356         return sprintf(buf, "%u\n", data->volt[index]);
357 }
358
359 static ssize_t temp_value_show(struct device *dev,
360                                struct device_attribute *devattr, char *buf)
361 {
362         struct fts_data *data = dev_get_drvdata(dev);
363         int index = to_sensor_dev_attr(devattr)->index;
364         int err;
365
366         err = fts_update_device(data);
367         if (err < 0)
368                 return err;
369
370         return sprintf(buf, "%u\n", data->temp_input[index]);
371 }
372
373 static ssize_t temp_fault_show(struct device *dev,
374                                struct device_attribute *devattr, char *buf)
375 {
376         struct fts_data *data = dev_get_drvdata(dev);
377         int index = to_sensor_dev_attr(devattr)->index;
378         int err;
379
380         err = fts_update_device(data);
381         if (err < 0)
382                 return err;
383
384         /* 00h Temperature = Sensor Error */
385         return sprintf(buf, "%d\n", data->temp_input[index] == 0);
386 }
387
388 static ssize_t temp_alarm_show(struct device *dev,
389                                struct device_attribute *devattr, char *buf)
390 {
391         struct fts_data *data = dev_get_drvdata(dev);
392         int index = to_sensor_dev_attr(devattr)->index;
393         int err;
394
395         err = fts_update_device(data);
396         if (err < 0)
397                 return err;
398
399         return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
400 }
401
402 static ssize_t
403 temp_alarm_store(struct device *dev, struct device_attribute *devattr,
404                  const char *buf, size_t count)
405 {
406         struct fts_data *data = dev_get_drvdata(dev);
407         int index = to_sensor_dev_attr(devattr)->index;
408         long ret;
409
410         ret = fts_update_device(data);
411         if (ret < 0)
412                 return ret;
413
414         if (kstrtoul(buf, 10, &ret) || ret != 0)
415                 return -EINVAL;
416
417         mutex_lock(&data->update_lock);
418         ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
419         if (ret < 0)
420                 goto error;
421
422         ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
423                              ret | 0x1);
424         if (ret < 0)
425                 goto error;
426
427         data->valid = false;
428         ret = count;
429 error:
430         mutex_unlock(&data->update_lock);
431         return ret;
432 }
433
434 static ssize_t fan_value_show(struct device *dev,
435                               struct device_attribute *devattr, char *buf)
436 {
437         struct fts_data *data = dev_get_drvdata(dev);
438         int index = to_sensor_dev_attr(devattr)->index;
439         int err;
440
441         err = fts_update_device(data);
442         if (err < 0)
443                 return err;
444
445         return sprintf(buf, "%u\n", data->fan_input[index]);
446 }
447
448 static ssize_t fan_source_show(struct device *dev,
449                                struct device_attribute *devattr, char *buf)
450 {
451         struct fts_data *data = dev_get_drvdata(dev);
452         int index = to_sensor_dev_attr(devattr)->index;
453         int err;
454
455         err = fts_update_device(data);
456         if (err < 0)
457                 return err;
458
459         return sprintf(buf, "%u\n", data->fan_source[index]);
460 }
461
462 static ssize_t fan_alarm_show(struct device *dev,
463                               struct device_attribute *devattr, char *buf)
464 {
465         struct fts_data *data = dev_get_drvdata(dev);
466         int index = to_sensor_dev_attr(devattr)->index;
467         int err;
468
469         err = fts_update_device(data);
470         if (err < 0)
471                 return err;
472
473         return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
474 }
475
476 static ssize_t
477 fan_alarm_store(struct device *dev, struct device_attribute *devattr,
478                 const char *buf, size_t count)
479 {
480         struct fts_data *data = dev_get_drvdata(dev);
481         int index = to_sensor_dev_attr(devattr)->index;
482         long ret;
483
484         ret = fts_update_device(data);
485         if (ret < 0)
486                 return ret;
487
488         if (kstrtoul(buf, 10, &ret) || ret != 0)
489                 return -EINVAL;
490
491         mutex_lock(&data->update_lock);
492         ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
493         if (ret < 0)
494                 goto error;
495
496         ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
497                              ret | 0x1);
498         if (ret < 0)
499                 goto error;
500
501         data->valid = false;
502         ret = count;
503 error:
504         mutex_unlock(&data->update_lock);
505         return ret;
506 }
507
508 /*****************************************************************************/
509 /* SysFS structs                                                             */
510 /*****************************************************************************/
511
512 /* Temprature sensors */
513 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0);
514 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1);
515 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2);
516 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3);
517 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4);
518 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5);
519 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6);
520 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7);
521 static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8);
522 static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9);
523 static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10);
524 static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11);
525 static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12);
526 static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13);
527 static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14);
528 static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15);
529
530 static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
531 static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
532 static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
533 static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
534 static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
535 static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
536 static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
537 static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
538 static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8);
539 static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9);
540 static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10);
541 static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11);
542 static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12);
543 static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13);
544 static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14);
545 static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15);
546
547 static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0);
548 static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1);
549 static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2);
550 static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3);
551 static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4);
552 static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5);
553 static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6);
554 static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7);
555 static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8);
556 static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9);
557 static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10);
558 static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11);
559 static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12);
560 static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13);
561 static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14);
562 static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15);
563
564 static struct attribute *fts_temp_attrs[] = {
565         &sensor_dev_attr_temp1_input.dev_attr.attr,
566         &sensor_dev_attr_temp2_input.dev_attr.attr,
567         &sensor_dev_attr_temp3_input.dev_attr.attr,
568         &sensor_dev_attr_temp4_input.dev_attr.attr,
569         &sensor_dev_attr_temp5_input.dev_attr.attr,
570         &sensor_dev_attr_temp6_input.dev_attr.attr,
571         &sensor_dev_attr_temp7_input.dev_attr.attr,
572         &sensor_dev_attr_temp8_input.dev_attr.attr,
573         &sensor_dev_attr_temp9_input.dev_attr.attr,
574         &sensor_dev_attr_temp10_input.dev_attr.attr,
575         &sensor_dev_attr_temp11_input.dev_attr.attr,
576         &sensor_dev_attr_temp12_input.dev_attr.attr,
577         &sensor_dev_attr_temp13_input.dev_attr.attr,
578         &sensor_dev_attr_temp14_input.dev_attr.attr,
579         &sensor_dev_attr_temp15_input.dev_attr.attr,
580         &sensor_dev_attr_temp16_input.dev_attr.attr,
581
582         &sensor_dev_attr_temp1_fault.dev_attr.attr,
583         &sensor_dev_attr_temp2_fault.dev_attr.attr,
584         &sensor_dev_attr_temp3_fault.dev_attr.attr,
585         &sensor_dev_attr_temp4_fault.dev_attr.attr,
586         &sensor_dev_attr_temp5_fault.dev_attr.attr,
587         &sensor_dev_attr_temp6_fault.dev_attr.attr,
588         &sensor_dev_attr_temp7_fault.dev_attr.attr,
589         &sensor_dev_attr_temp8_fault.dev_attr.attr,
590         &sensor_dev_attr_temp9_fault.dev_attr.attr,
591         &sensor_dev_attr_temp10_fault.dev_attr.attr,
592         &sensor_dev_attr_temp11_fault.dev_attr.attr,
593         &sensor_dev_attr_temp12_fault.dev_attr.attr,
594         &sensor_dev_attr_temp13_fault.dev_attr.attr,
595         &sensor_dev_attr_temp14_fault.dev_attr.attr,
596         &sensor_dev_attr_temp15_fault.dev_attr.attr,
597         &sensor_dev_attr_temp16_fault.dev_attr.attr,
598
599         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
600         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
601         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
602         &sensor_dev_attr_temp4_alarm.dev_attr.attr,
603         &sensor_dev_attr_temp5_alarm.dev_attr.attr,
604         &sensor_dev_attr_temp6_alarm.dev_attr.attr,
605         &sensor_dev_attr_temp7_alarm.dev_attr.attr,
606         &sensor_dev_attr_temp8_alarm.dev_attr.attr,
607         &sensor_dev_attr_temp9_alarm.dev_attr.attr,
608         &sensor_dev_attr_temp10_alarm.dev_attr.attr,
609         &sensor_dev_attr_temp11_alarm.dev_attr.attr,
610         &sensor_dev_attr_temp12_alarm.dev_attr.attr,
611         &sensor_dev_attr_temp13_alarm.dev_attr.attr,
612         &sensor_dev_attr_temp14_alarm.dev_attr.attr,
613         &sensor_dev_attr_temp15_alarm.dev_attr.attr,
614         &sensor_dev_attr_temp16_alarm.dev_attr.attr,
615         NULL
616 };
617
618 /* Fans */
619 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0);
620 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1);
621 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2);
622 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3);
623 static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4);
624 static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5);
625 static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6);
626 static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7);
627
628 static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0);
629 static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1);
630 static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2);
631 static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3);
632 static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4);
633 static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5);
634 static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6);
635 static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7);
636
637 static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0);
638 static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1);
639 static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2);
640 static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3);
641 static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4);
642 static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5);
643 static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6);
644 static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7);
645
646 static struct attribute *fts_fan_attrs[] = {
647         &sensor_dev_attr_fan1_input.dev_attr.attr,
648         &sensor_dev_attr_fan2_input.dev_attr.attr,
649         &sensor_dev_attr_fan3_input.dev_attr.attr,
650         &sensor_dev_attr_fan4_input.dev_attr.attr,
651         &sensor_dev_attr_fan5_input.dev_attr.attr,
652         &sensor_dev_attr_fan6_input.dev_attr.attr,
653         &sensor_dev_attr_fan7_input.dev_attr.attr,
654         &sensor_dev_attr_fan8_input.dev_attr.attr,
655
656         &sensor_dev_attr_fan1_source.dev_attr.attr,
657         &sensor_dev_attr_fan2_source.dev_attr.attr,
658         &sensor_dev_attr_fan3_source.dev_attr.attr,
659         &sensor_dev_attr_fan4_source.dev_attr.attr,
660         &sensor_dev_attr_fan5_source.dev_attr.attr,
661         &sensor_dev_attr_fan6_source.dev_attr.attr,
662         &sensor_dev_attr_fan7_source.dev_attr.attr,
663         &sensor_dev_attr_fan8_source.dev_attr.attr,
664
665         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
666         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
667         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
668         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
669         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
670         &sensor_dev_attr_fan6_alarm.dev_attr.attr,
671         &sensor_dev_attr_fan7_alarm.dev_attr.attr,
672         &sensor_dev_attr_fan8_alarm.dev_attr.attr,
673         NULL
674 };
675
676 /* Voltages */
677 static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0);
678 static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1);
679 static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2);
680 static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3);
681 static struct attribute *fts_voltage_attrs[] = {
682         &sensor_dev_attr_in1_input.dev_attr.attr,
683         &sensor_dev_attr_in2_input.dev_attr.attr,
684         &sensor_dev_attr_in3_input.dev_attr.attr,
685         &sensor_dev_attr_in4_input.dev_attr.attr,
686         NULL
687 };
688
689 static const struct attribute_group fts_voltage_attr_group = {
690         .attrs = fts_voltage_attrs
691 };
692
693 static const struct attribute_group fts_temp_attr_group = {
694         .attrs = fts_temp_attrs
695 };
696
697 static const struct attribute_group fts_fan_attr_group = {
698         .attrs = fts_fan_attrs
699 };
700
701 static const struct attribute_group *fts_attr_groups[] = {
702         &fts_voltage_attr_group,
703         &fts_temp_attr_group,
704         &fts_fan_attr_group,
705         NULL
706 };
707
708 /*****************************************************************************/
709 /* Module initialization / remove functions                                  */
710 /*****************************************************************************/
711 static int fts_detect(struct i2c_client *client,
712                       struct i2c_board_info *info)
713 {
714         int val;
715
716         /* detection works with revsion greater or equal to 0x2b */
717         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
718         if (val < 0x2b)
719                 return -ENODEV;
720
721         /* Device Detect Regs must have 0x17 0x34 and 0x54 */
722         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
723         if (val != 0x17)
724                 return -ENODEV;
725
726         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
727         if (val != 0x34)
728                 return -ENODEV;
729
730         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
731         if (val != 0x54)
732                 return -ENODEV;
733
734         /*
735          * 0x10 == Baseboard Management Controller, 0x01 == Teutates
736          * Device ID Reg needs to be 0x11
737          */
738         val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
739         if (val != 0x11)
740                 return -ENODEV;
741
742         strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
743         info->flags = 0;
744         return 0;
745 }
746
747 static int fts_remove(struct i2c_client *client)
748 {
749         struct fts_data *data = dev_get_drvdata(&client->dev);
750
751         watchdog_unregister_device(&data->wdd);
752         return 0;
753 }
754
755 static int fts_probe(struct i2c_client *client, const struct i2c_device_id *id)
756 {
757         u8 revision;
758         struct fts_data *data;
759         int err;
760         s8 deviceid;
761         struct device *hwmon_dev;
762
763         if (client->addr != 0x73)
764                 return -ENODEV;
765
766         /* Baseboard Management Controller check */
767         deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
768         if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
769                 switch (deviceid & 0x0F) {
770                 case 0x01:
771                         break;
772                 default:
773                         dev_dbg(&client->dev,
774                                 "No Baseboard Management Controller\n");
775                         return -ENODEV;
776                 }
777         } else {
778                 dev_dbg(&client->dev, "No fujitsu board\n");
779                 return -ENODEV;
780         }
781
782         data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
783                             GFP_KERNEL);
784         if (!data)
785                 return -ENOMEM;
786
787         mutex_init(&data->update_lock);
788         mutex_init(&data->access_lock);
789         data->client = client;
790         dev_set_drvdata(&client->dev, data);
791
792         err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
793         if (err < 0)
794                 return err;
795         revision = err;
796
797         hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
798                                                            "ftsteutates",
799                                                            data,
800                                                            fts_attr_groups);
801         if (IS_ERR(hwmon_dev))
802                 return PTR_ERR(hwmon_dev);
803
804         err = fts_watchdog_init(data);
805         if (err)
806                 return err;
807
808         dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
809                  (revision & 0xF0) >> 4, revision & 0x0F);
810         return 0;
811 }
812
813 /*****************************************************************************/
814 /* Module Details                                                            */
815 /*****************************************************************************/
816 static struct i2c_driver fts_driver = {
817         .class = I2C_CLASS_HWMON,
818         .driver = {
819                 .name = "ftsteutates",
820         },
821         .id_table = fts_id,
822         .probe = fts_probe,
823         .remove = fts_remove,
824         .detect = fts_detect,
825         .address_list = normal_i2c,
826 };
827
828 module_i2c_driver(fts_driver);
829
830 MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
831 MODULE_DESCRIPTION("FTS Teutates driver");
832 MODULE_LICENSE("GPL");