Merge tag 'staging-4.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[linux-2.6-microblaze.git] / drivers / hwmon / nct7802.c
1 /*
2  * nct7802 - Driver for Nuvoton NCT7802Y
3  *
4  * Copyright (C) 2014  Guenter Roeck <linux@roeck-us.net>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/err.h>
20 #include <linux/i2c.h>
21 #include <linux/init.h>
22 #include <linux/hwmon.h>
23 #include <linux/hwmon-sysfs.h>
24 #include <linux/jiffies.h>
25 #include <linux/module.h>
26 #include <linux/mutex.h>
27 #include <linux/regmap.h>
28 #include <linux/slab.h>
29
30 #define DRVNAME "nct7802"
31
32 static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e };
33
34 static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = {
35         { 0x40, 0x00, 0x42, 0x44, 0x46 },
36         { 0x3f, 0x00, 0x41, 0x43, 0x45 },
37 };
38
39 static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 };
40
41 static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = {
42         { 0, 0, 4, 0, 4 },
43         { 2, 0, 6, 2, 6 },
44 };
45
46 #define REG_BANK                0x00
47 #define REG_TEMP_LSB            0x05
48 #define REG_TEMP_PECI_LSB       0x08
49 #define REG_VOLTAGE_LOW         0x0f
50 #define REG_FANCOUNT_LOW        0x13
51 #define REG_START               0x21
52 #define REG_MODE                0x22 /* 7.2.32 Mode Selection Register */
53 #define REG_PECI_ENABLE         0x23
54 #define REG_FAN_ENABLE          0x24
55 #define REG_VMON_ENABLE         0x25
56 #define REG_PWM(x)              (0x60 + (x))
57 #define REG_SMARTFAN_EN(x)      (0x64 + (x) / 2)
58 #define SMARTFAN_EN_SHIFT(x)    ((x) % 2 * 4)
59 #define REG_VENDOR_ID           0xfd
60 #define REG_CHIP_ID             0xfe
61 #define REG_VERSION_ID          0xff
62
63 /*
64  * Data structures and manipulation thereof
65  */
66
67 struct nct7802_data {
68         struct regmap *regmap;
69         struct mutex access_lock; /* for multi-byte read and write operations */
70 };
71
72 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
73                               char *buf)
74 {
75         struct nct7802_data *data = dev_get_drvdata(dev);
76         struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
77         unsigned int mode;
78         int ret;
79
80         ret = regmap_read(data->regmap, REG_MODE, &mode);
81         if (ret < 0)
82                 return ret;
83
84         return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2);
85 }
86
87 static ssize_t store_temp_type(struct device *dev,
88                                struct device_attribute *attr,
89                                const char *buf, size_t count)
90 {
91         struct nct7802_data *data = dev_get_drvdata(dev);
92         struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
93         unsigned int type;
94         int err;
95
96         err = kstrtouint(buf, 0, &type);
97         if (err < 0)
98                 return err;
99         if (sattr->index == 2 && type != 4) /* RD3 */
100                 return -EINVAL;
101         if (type < 3 || type > 4)
102                 return -EINVAL;
103         err = regmap_update_bits(data->regmap, REG_MODE,
104                         3 << 2 * sattr->index, (type - 2) << 2 * sattr->index);
105         return err ? : count;
106 }
107
108 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
109                              char *buf)
110 {
111         struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
112         struct nct7802_data *data = dev_get_drvdata(dev);
113         unsigned int regval;
114         int ret;
115
116         if (sattr->index > 1)
117                 return sprintf(buf, "1\n");
118
119         ret = regmap_read(data->regmap, 0x5E, &regval);
120         if (ret < 0)
121                 return ret;
122
123         return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
124 }
125
126 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
127                         char *buf)
128 {
129         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
130         struct nct7802_data *data = dev_get_drvdata(dev);
131         unsigned int val;
132         int ret;
133
134         if (!attr->index)
135                 return sprintf(buf, "255\n");
136
137         ret = regmap_read(data->regmap, attr->index, &val);
138         if (ret < 0)
139                 return ret;
140
141         return sprintf(buf, "%d\n", val);
142 }
143
144 static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr,
145                          const char *buf, size_t count)
146 {
147         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
148         struct nct7802_data *data = dev_get_drvdata(dev);
149         int err;
150         u8 val;
151
152         err = kstrtou8(buf, 0, &val);
153         if (err < 0)
154                 return err;
155
156         err = regmap_write(data->regmap, attr->index, val);
157         return err ? : count;
158 }
159
160 static ssize_t show_pwm_enable(struct device *dev,
161                                struct device_attribute *attr, char *buf)
162 {
163         struct nct7802_data *data = dev_get_drvdata(dev);
164         struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
165         unsigned int reg, enabled;
166         int ret;
167
168         ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), &reg);
169         if (ret < 0)
170                 return ret;
171         enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1;
172         return sprintf(buf, "%u\n", enabled + 1);
173 }
174
175 static ssize_t store_pwm_enable(struct device *dev,
176                                 struct device_attribute *attr,
177                                 const char *buf, size_t count)
178 {
179         struct nct7802_data *data = dev_get_drvdata(dev);
180         struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
181         u8 val;
182         int ret;
183
184         ret = kstrtou8(buf, 0, &val);
185         if (ret < 0)
186                 return ret;
187         if (val < 1 || val > 2)
188                 return -EINVAL;
189         ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index),
190                                  1 << SMARTFAN_EN_SHIFT(sattr->index),
191                                  (val - 1) << SMARTFAN_EN_SHIFT(sattr->index));
192         return ret ? : count;
193 }
194
195 static int nct7802_read_temp(struct nct7802_data *data,
196                              u8 reg_temp, u8 reg_temp_low, int *temp)
197 {
198         unsigned int t1, t2 = 0;
199         int err;
200
201         *temp = 0;
202
203         mutex_lock(&data->access_lock);
204         err = regmap_read(data->regmap, reg_temp, &t1);
205         if (err < 0)
206                 goto abort;
207         t1 <<= 8;
208         if (reg_temp_low) {     /* 11 bit data */
209                 err = regmap_read(data->regmap, reg_temp_low, &t2);
210                 if (err < 0)
211                         goto abort;
212         }
213         t1 |= t2 & 0xe0;
214         *temp = (s16)t1 / 32 * 125;
215 abort:
216         mutex_unlock(&data->access_lock);
217         return err;
218 }
219
220 static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan)
221 {
222         unsigned int f1, f2;
223         int ret;
224
225         mutex_lock(&data->access_lock);
226         ret = regmap_read(data->regmap, reg_fan, &f1);
227         if (ret < 0)
228                 goto abort;
229         ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2);
230         if (ret < 0)
231                 goto abort;
232         ret = (f1 << 5) | (f2 >> 3);
233         /* convert fan count to rpm */
234         if (ret == 0x1fff)      /* maximum value, assume fan is stopped */
235                 ret = 0;
236         else if (ret)
237                 ret = DIV_ROUND_CLOSEST(1350000U, ret);
238 abort:
239         mutex_unlock(&data->access_lock);
240         return ret;
241 }
242
243 static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low,
244                                 u8 reg_fan_high)
245 {
246         unsigned int f1, f2;
247         int ret;
248
249         mutex_lock(&data->access_lock);
250         ret = regmap_read(data->regmap, reg_fan_low, &f1);
251         if (ret < 0)
252                 goto abort;
253         ret = regmap_read(data->regmap, reg_fan_high, &f2);
254         if (ret < 0)
255                 goto abort;
256         ret = f1 | ((f2 & 0xf8) << 5);
257         /* convert fan count to rpm */
258         if (ret == 0x1fff)      /* maximum value, assume no limit */
259                 ret = 0;
260         else if (ret)
261                 ret = DIV_ROUND_CLOSEST(1350000U, ret);
262         else
263                 ret = 1350000U;
264 abort:
265         mutex_unlock(&data->access_lock);
266         return ret;
267 }
268
269 static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low,
270                                  u8 reg_fan_high, unsigned long limit)
271 {
272         int err;
273
274         if (limit)
275                 limit = DIV_ROUND_CLOSEST(1350000U, limit);
276         else
277                 limit = 0x1fff;
278         limit = clamp_val(limit, 0, 0x1fff);
279
280         mutex_lock(&data->access_lock);
281         err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
282         if (err < 0)
283                 goto abort;
284
285         err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
286 abort:
287         mutex_unlock(&data->access_lock);
288         return err;
289 }
290
291 static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 };
292
293 static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index)
294 {
295         unsigned int v1, v2;
296         int ret;
297
298         mutex_lock(&data->access_lock);
299         if (index == 0) {       /* voltage */
300                 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1);
301                 if (ret < 0)
302                         goto abort;
303                 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2);
304                 if (ret < 0)
305                         goto abort;
306                 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr];
307         }  else {       /* limit */
308                 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
309
310                 ret = regmap_read(data->regmap,
311                                   REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1);
312                 if (ret < 0)
313                         goto abort;
314                 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
315                                   &v2);
316                 if (ret < 0)
317                         goto abort;
318                 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr];
319         }
320 abort:
321         mutex_unlock(&data->access_lock);
322         return ret;
323 }
324
325 static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
326                                  unsigned long voltage)
327 {
328         int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
329         int err;
330
331         voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]);
332         voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
333
334         mutex_lock(&data->access_lock);
335         err = regmap_write(data->regmap,
336                            REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
337                            voltage & 0xff);
338         if (err < 0)
339                 goto abort;
340
341         err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
342                                  0x0300 >> shift, (voltage & 0x0300) >> shift);
343 abort:
344         mutex_unlock(&data->access_lock);
345         return err;
346 }
347
348 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
349                        char *buf)
350 {
351         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
352         struct nct7802_data *data = dev_get_drvdata(dev);
353         int voltage;
354
355         voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
356         if (voltage < 0)
357                 return voltage;
358
359         return sprintf(buf, "%d\n", voltage);
360 }
361
362 static ssize_t store_in(struct device *dev, struct device_attribute *attr,
363                         const char *buf, size_t count)
364 {
365         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
366         struct nct7802_data *data = dev_get_drvdata(dev);
367         int index = sattr->index;
368         int nr = sattr->nr;
369         unsigned long val;
370         int err;
371
372         err = kstrtoul(buf, 10, &val);
373         if (err < 0)
374                 return err;
375
376         err = nct7802_write_voltage(data, nr, index, val);
377         return err ? : count;
378 }
379
380 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
381                          char *buf)
382 {
383         struct nct7802_data *data = dev_get_drvdata(dev);
384         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
385         int err, temp;
386
387         err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
388         if (err < 0)
389                 return err;
390
391         return sprintf(buf, "%d\n", temp);
392 }
393
394 static ssize_t store_temp(struct device *dev, struct device_attribute *attr,
395                           const char *buf, size_t count)
396 {
397         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
398         struct nct7802_data *data = dev_get_drvdata(dev);
399         int nr = sattr->nr;
400         long val;
401         int err;
402
403         err = kstrtol(buf, 10, &val);
404         if (err < 0)
405                 return err;
406
407         val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000);
408
409         err = regmap_write(data->regmap, nr, val & 0xff);
410         return err ? : count;
411 }
412
413 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
414                         char *buf)
415 {
416         struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
417         struct nct7802_data *data = dev_get_drvdata(dev);
418         int speed;
419
420         speed = nct7802_read_fan(data, sattr->index);
421         if (speed < 0)
422                 return speed;
423
424         return sprintf(buf, "%d\n", speed);
425 }
426
427 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
428                             char *buf)
429 {
430         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
431         struct nct7802_data *data = dev_get_drvdata(dev);
432         int speed;
433
434         speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
435         if (speed < 0)
436                 return speed;
437
438         return sprintf(buf, "%d\n", speed);
439 }
440
441 static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr,
442                              const char *buf, size_t count)
443 {
444         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
445         struct nct7802_data *data = dev_get_drvdata(dev);
446         unsigned long val;
447         int err;
448
449         err = kstrtoul(buf, 10, &val);
450         if (err < 0)
451                 return err;
452
453         err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
454         return err ? : count;
455 }
456
457 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
458                           char *buf)
459 {
460         struct nct7802_data *data = dev_get_drvdata(dev);
461         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
462         int bit = sattr->index;
463         unsigned int val;
464         int ret;
465
466         ret = regmap_read(data->regmap, sattr->nr, &val);
467         if (ret < 0)
468                 return ret;
469
470         return sprintf(buf, "%u\n", !!(val & (1 << bit)));
471 }
472
473 static ssize_t
474 show_beep(struct device *dev, struct device_attribute *attr, char *buf)
475 {
476         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
477         struct nct7802_data *data = dev_get_drvdata(dev);
478         unsigned int regval;
479         int err;
480
481         err = regmap_read(data->regmap, sattr->nr, &regval);
482         if (err)
483                 return err;
484
485         return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
486 }
487
488 static ssize_t
489 store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
490            size_t count)
491 {
492         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
493         struct nct7802_data *data = dev_get_drvdata(dev);
494         unsigned long val;
495         int err;
496
497         err = kstrtoul(buf, 10, &val);
498         if (err < 0)
499                 return err;
500         if (val > 1)
501                 return -EINVAL;
502
503         err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
504                                  val ? 1 << sattr->index : 0);
505         return err ? : count;
506 }
507
508 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
509                           show_temp_type, store_temp_type, 0);
510 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01,
511                             REG_TEMP_LSB);
512 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp,
513                             store_temp, 0x31, 0);
514 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp,
515                             store_temp, 0x30, 0);
516 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp,
517                             store_temp, 0x3a, 0);
518
519 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
520                           show_temp_type, store_temp_type, 1);
521 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02,
522                             REG_TEMP_LSB);
523 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp,
524                             store_temp, 0x33, 0);
525 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp,
526                             store_temp, 0x32, 0);
527 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp,
528                             store_temp, 0x3b, 0);
529
530 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
531                           show_temp_type, store_temp_type, 2);
532 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03,
533                             REG_TEMP_LSB);
534 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp,
535                             store_temp, 0x35, 0);
536 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp,
537                             store_temp, 0x34, 0);
538 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp,
539                             store_temp, 0x3c, 0);
540
541 static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0);
542 static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp,
543                             store_temp, 0x37, 0);
544 static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp,
545                             store_temp, 0x36, 0);
546 static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp,
547                             store_temp, 0x3d, 0);
548
549 static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06,
550                             REG_TEMP_PECI_LSB);
551 static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp,
552                             store_temp, 0x39, 0);
553 static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp,
554                             store_temp, 0x38, 0);
555 static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp,
556                             store_temp, 0x3e, 0);
557
558 static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07,
559                             REG_TEMP_PECI_LSB);
560
561 static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
562                             0x18, 0);
563 static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL,
564                             0x18, 1);
565 static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL,
566                             0x18, 2);
567 static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL,
568                             0x18, 3);
569 static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL,
570                             0x18, 4);
571
572 static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
573                             0x19, 0);
574 static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL,
575                             0x19, 1);
576 static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL,
577                             0x19, 2);
578 static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL,
579                             0x19, 3);
580 static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL,
581                             0x19, 4);
582
583 static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
584                             0x1b, 0);
585 static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL,
586                             0x1b, 1);
587 static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL,
588                             0x1b, 2);
589 static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL,
590                             0x1b, 3);
591 static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL,
592                             0x1b, 4);
593
594 static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0);
595 static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1);
596 static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2);
597
598 static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep,
599                             store_beep, 0x5c, 0);
600 static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep,
601                             store_beep, 0x5c, 1);
602 static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep,
603                             store_beep, 0x5c, 2);
604 static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep,
605                             store_beep, 0x5c, 3);
606 static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep,
607                             store_beep, 0x5c, 4);
608 static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep,
609                             store_beep, 0x5c, 5);
610
611 static struct attribute *nct7802_temp_attrs[] = {
612         &sensor_dev_attr_temp1_type.dev_attr.attr,
613         &sensor_dev_attr_temp1_input.dev_attr.attr,
614         &sensor_dev_attr_temp1_min.dev_attr.attr,
615         &sensor_dev_attr_temp1_max.dev_attr.attr,
616         &sensor_dev_attr_temp1_crit.dev_attr.attr,
617         &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
618         &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
619         &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
620         &sensor_dev_attr_temp1_fault.dev_attr.attr,
621         &sensor_dev_attr_temp1_beep.dev_attr.attr,
622
623         &sensor_dev_attr_temp2_type.dev_attr.attr,              /* 10 */
624         &sensor_dev_attr_temp2_input.dev_attr.attr,
625         &sensor_dev_attr_temp2_min.dev_attr.attr,
626         &sensor_dev_attr_temp2_max.dev_attr.attr,
627         &sensor_dev_attr_temp2_crit.dev_attr.attr,
628         &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
629         &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
630         &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
631         &sensor_dev_attr_temp2_fault.dev_attr.attr,
632         &sensor_dev_attr_temp2_beep.dev_attr.attr,
633
634         &sensor_dev_attr_temp3_type.dev_attr.attr,              /* 20 */
635         &sensor_dev_attr_temp3_input.dev_attr.attr,
636         &sensor_dev_attr_temp3_min.dev_attr.attr,
637         &sensor_dev_attr_temp3_max.dev_attr.attr,
638         &sensor_dev_attr_temp3_crit.dev_attr.attr,
639         &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
640         &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
641         &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
642         &sensor_dev_attr_temp3_fault.dev_attr.attr,
643         &sensor_dev_attr_temp3_beep.dev_attr.attr,
644
645         &sensor_dev_attr_temp4_input.dev_attr.attr,             /* 30 */
646         &sensor_dev_attr_temp4_min.dev_attr.attr,
647         &sensor_dev_attr_temp4_max.dev_attr.attr,
648         &sensor_dev_attr_temp4_crit.dev_attr.attr,
649         &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
650         &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
651         &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
652         &sensor_dev_attr_temp4_beep.dev_attr.attr,
653
654         &sensor_dev_attr_temp5_input.dev_attr.attr,             /* 38 */
655         &sensor_dev_attr_temp5_min.dev_attr.attr,
656         &sensor_dev_attr_temp5_max.dev_attr.attr,
657         &sensor_dev_attr_temp5_crit.dev_attr.attr,
658         &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
659         &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
660         &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
661         &sensor_dev_attr_temp5_beep.dev_attr.attr,
662
663         &sensor_dev_attr_temp6_input.dev_attr.attr,             /* 46 */
664         &sensor_dev_attr_temp6_beep.dev_attr.attr,
665
666         NULL
667 };
668
669 static umode_t nct7802_temp_is_visible(struct kobject *kobj,
670                                        struct attribute *attr, int index)
671 {
672         struct device *dev = container_of(kobj, struct device, kobj);
673         struct nct7802_data *data = dev_get_drvdata(dev);
674         unsigned int reg;
675         int err;
676
677         err = regmap_read(data->regmap, REG_MODE, &reg);
678         if (err < 0)
679                 return 0;
680
681         if (index < 10 &&
682             (reg & 03) != 0x01 && (reg & 0x03) != 0x02)         /* RD1 */
683                 return 0;
684
685         if (index >= 10 && index < 20 &&
686             (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08)       /* RD2 */
687                 return 0;
688         if (index >= 20 && index < 30 && (reg & 0x30) != 0x20)  /* RD3 */
689                 return 0;
690
691         if (index >= 30 && index < 38)                          /* local */
692                 return attr->mode;
693
694         err = regmap_read(data->regmap, REG_PECI_ENABLE, &reg);
695         if (err < 0)
696                 return 0;
697
698         if (index >= 38 && index < 46 && !(reg & 0x01))         /* PECI 0 */
699                 return 0;
700
701         if (index >= 0x46 && (!(reg & 0x02)))                   /* PECI 1 */
702                 return 0;
703
704         return attr->mode;
705 }
706
707 static const struct attribute_group nct7802_temp_group = {
708         .attrs = nct7802_temp_attrs,
709         .is_visible = nct7802_temp_is_visible,
710 };
711
712 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
713 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in,
714                             0, 1);
715 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in,
716                             0, 2);
717 static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3);
718 static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
719                             0x5a, 3);
720
721 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
722
723 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
724 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in,
725                             2, 1);
726 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in,
727                             2, 2);
728 static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0);
729 static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
730                             0x5a, 0);
731
732 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
733 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in,
734                             3, 1);
735 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in,
736                             3, 2);
737 static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1);
738 static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
739                             0x5a, 1);
740
741 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
742 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in,
743                             4, 1);
744 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in,
745                             4, 2);
746 static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2);
747 static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
748                             0x5a, 2);
749
750 static struct attribute *nct7802_in_attrs[] = {
751         &sensor_dev_attr_in0_input.dev_attr.attr,
752         &sensor_dev_attr_in0_min.dev_attr.attr,
753         &sensor_dev_attr_in0_max.dev_attr.attr,
754         &sensor_dev_attr_in0_alarm.dev_attr.attr,
755         &sensor_dev_attr_in0_beep.dev_attr.attr,
756
757         &sensor_dev_attr_in1_input.dev_attr.attr,       /* 5 */
758
759         &sensor_dev_attr_in2_input.dev_attr.attr,       /* 6 */
760         &sensor_dev_attr_in2_min.dev_attr.attr,
761         &sensor_dev_attr_in2_max.dev_attr.attr,
762         &sensor_dev_attr_in2_alarm.dev_attr.attr,
763         &sensor_dev_attr_in2_beep.dev_attr.attr,
764
765         &sensor_dev_attr_in3_input.dev_attr.attr,       /* 11 */
766         &sensor_dev_attr_in3_min.dev_attr.attr,
767         &sensor_dev_attr_in3_max.dev_attr.attr,
768         &sensor_dev_attr_in3_alarm.dev_attr.attr,
769         &sensor_dev_attr_in3_beep.dev_attr.attr,
770
771         &sensor_dev_attr_in4_input.dev_attr.attr,       /* 17 */
772         &sensor_dev_attr_in4_min.dev_attr.attr,
773         &sensor_dev_attr_in4_max.dev_attr.attr,
774         &sensor_dev_attr_in4_alarm.dev_attr.attr,
775         &sensor_dev_attr_in4_beep.dev_attr.attr,
776
777         NULL,
778 };
779
780 static umode_t nct7802_in_is_visible(struct kobject *kobj,
781                                      struct attribute *attr, int index)
782 {
783         struct device *dev = container_of(kobj, struct device, kobj);
784         struct nct7802_data *data = dev_get_drvdata(dev);
785         unsigned int reg;
786         int err;
787
788         if (index < 6)                                          /* VCC, VCORE */
789                 return attr->mode;
790
791         err = regmap_read(data->regmap, REG_MODE, &reg);
792         if (err < 0)
793                 return 0;
794
795         if (index >= 6 && index < 11 && (reg & 0x03) != 0x03)   /* VSEN1 */
796                 return 0;
797         if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c)  /* VSEN2 */
798                 return 0;
799         if (index >= 17 && (reg & 0x30) != 0x30)                /* VSEN3 */
800                 return 0;
801
802         return attr->mode;
803 }
804
805 static const struct attribute_group nct7802_in_group = {
806         .attrs = nct7802_in_attrs,
807         .is_visible = nct7802_in_is_visible,
808 };
809
810 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10);
811 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min,
812                             store_fan_min, 0x49, 0x4c);
813 static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0);
814 static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
815                             0x5b, 0);
816 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11);
817 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min,
818                             store_fan_min, 0x4a, 0x4d);
819 static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1);
820 static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
821                             0x5b, 1);
822 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12);
823 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min,
824                             store_fan_min, 0x4b, 0x4e);
825 static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2);
826 static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
827                             0x5b, 2);
828
829 /* 7.2.89 Fan Control Output Type */
830 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
831 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
832 static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
833
834 /* 7.2.91... Fan Control Output Value */
835 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
836                           REG_PWM(0));
837 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
838                           REG_PWM(1));
839 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
840                           REG_PWM(2));
841
842 /* 7.2.95... Temperature to Fan mapping Relationships Register */
843 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
844                           store_pwm_enable, 0);
845 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
846                           store_pwm_enable, 1);
847 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
848                           store_pwm_enable, 2);
849
850 static struct attribute *nct7802_fan_attrs[] = {
851         &sensor_dev_attr_fan1_input.dev_attr.attr,
852         &sensor_dev_attr_fan1_min.dev_attr.attr,
853         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
854         &sensor_dev_attr_fan1_beep.dev_attr.attr,
855         &sensor_dev_attr_fan2_input.dev_attr.attr,
856         &sensor_dev_attr_fan2_min.dev_attr.attr,
857         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
858         &sensor_dev_attr_fan2_beep.dev_attr.attr,
859         &sensor_dev_attr_fan3_input.dev_attr.attr,
860         &sensor_dev_attr_fan3_min.dev_attr.attr,
861         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
862         &sensor_dev_attr_fan3_beep.dev_attr.attr,
863
864         NULL
865 };
866
867 static umode_t nct7802_fan_is_visible(struct kobject *kobj,
868                                       struct attribute *attr, int index)
869 {
870         struct device *dev = container_of(kobj, struct device, kobj);
871         struct nct7802_data *data = dev_get_drvdata(dev);
872         int fan = index / 4;    /* 4 attributes per fan */
873         unsigned int reg;
874         int err;
875
876         err = regmap_read(data->regmap, REG_FAN_ENABLE, &reg);
877         if (err < 0 || !(reg & (1 << fan)))
878                 return 0;
879
880         return attr->mode;
881 }
882
883 static const struct attribute_group nct7802_fan_group = {
884         .attrs = nct7802_fan_attrs,
885         .is_visible = nct7802_fan_is_visible,
886 };
887
888 static struct attribute *nct7802_pwm_attrs[] = {
889         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
890         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
891         &sensor_dev_attr_pwm1.dev_attr.attr,
892         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
893         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
894         &sensor_dev_attr_pwm2.dev_attr.attr,
895         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
896         &sensor_dev_attr_pwm3_mode.dev_attr.attr,
897         &sensor_dev_attr_pwm3.dev_attr.attr,
898         NULL
899 };
900
901 static const struct attribute_group nct7802_pwm_group = {
902         .attrs = nct7802_pwm_attrs,
903 };
904
905 /* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */
906 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
907                             show_temp, store_temp, 0x80, 0);
908 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
909                             show_temp, store_temp, 0x81, 0);
910 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
911                             show_temp, store_temp, 0x82, 0);
912 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
913                             show_temp, store_temp, 0x83, 0);
914 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point5_temp, S_IRUGO | S_IWUSR,
915                             show_temp, store_temp, 0x84, 0);
916
917 /* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */
918 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
919                           show_pwm, store_pwm, 0x85);
920 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
921                           show_pwm, store_pwm, 0x86);
922 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
923                           show_pwm, store_pwm, 0x87);
924 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IRUGO | S_IWUSR,
925                           show_pwm, store_pwm, 0x88);
926 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
927
928 /* 7.2.124 Table 2 X-axis Transition Point 1 Register */
929 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
930                             show_temp, store_temp, 0x90, 0);
931 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
932                             show_temp, store_temp, 0x91, 0);
933 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
934                             show_temp, store_temp, 0x92, 0);
935 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
936                             show_temp, store_temp, 0x93, 0);
937 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point5_temp, S_IRUGO | S_IWUSR,
938                             show_temp, store_temp, 0x94, 0);
939
940 /* 7.2.129 Table 2 Y-axis Transition Point 1 Register */
941 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
942                           show_pwm, store_pwm, 0x95);
943 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
944                           show_pwm, store_pwm, 0x96);
945 static SENSOR_DEVICE_ATTR(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
946                           show_pwm, store_pwm, 0x97);
947 static SENSOR_DEVICE_ATTR(pwm2_auto_point4_pwm, S_IRUGO | S_IWUSR,
948                           show_pwm, store_pwm, 0x98);
949 static SENSOR_DEVICE_ATTR(pwm2_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
950
951 /* 7.2.133 Table 3 X-axis Transition Point 1 Register */
952 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
953                             show_temp, store_temp, 0xA0, 0);
954 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
955                             show_temp, store_temp, 0xA1, 0);
956 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
957                             show_temp, store_temp, 0xA2, 0);
958 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
959                             show_temp, store_temp, 0xA3, 0);
960 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point5_temp, S_IRUGO | S_IWUSR,
961                             show_temp, store_temp, 0xA4, 0);
962
963 /* 7.2.138 Table 3 Y-axis Transition Point 1 Register */
964 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
965                           show_pwm, store_pwm, 0xA5);
966 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
967                           show_pwm, store_pwm, 0xA6);
968 static SENSOR_DEVICE_ATTR(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
969                           show_pwm, store_pwm, 0xA7);
970 static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR,
971                           show_pwm, store_pwm, 0xA8);
972 static SENSOR_DEVICE_ATTR(pwm3_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
973
974 static struct attribute *nct7802_auto_point_attrs[] = {
975         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
976         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
977         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
978         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
979         &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
980
981         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
982         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
983         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
984         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
985         &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
986
987         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
988         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
989         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
990         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
991         &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
992
993         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
994         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
995         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
996         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
997         &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
998
999         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1000         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1001         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1002         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1003         &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr,
1004
1005         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1006         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1007         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1008         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1009         &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr,
1010
1011         NULL
1012 };
1013
1014 static const struct attribute_group nct7802_auto_point_group = {
1015         .attrs = nct7802_auto_point_attrs,
1016 };
1017
1018 static const struct attribute_group *nct7802_groups[] = {
1019         &nct7802_temp_group,
1020         &nct7802_in_group,
1021         &nct7802_fan_group,
1022         &nct7802_pwm_group,
1023         &nct7802_auto_point_group,
1024         NULL
1025 };
1026
1027 static int nct7802_detect(struct i2c_client *client,
1028                           struct i2c_board_info *info)
1029 {
1030         int reg;
1031
1032         /*
1033          * Chip identification registers are only available in bank 0,
1034          * so only attempt chip detection if bank 0 is selected
1035          */
1036         reg = i2c_smbus_read_byte_data(client, REG_BANK);
1037         if (reg != 0x00)
1038                 return -ENODEV;
1039
1040         reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
1041         if (reg != 0x50)
1042                 return -ENODEV;
1043
1044         reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
1045         if (reg != 0xc3)
1046                 return -ENODEV;
1047
1048         reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
1049         if (reg < 0 || (reg & 0xf0) != 0x20)
1050                 return -ENODEV;
1051
1052         /* Also validate lower bits of voltage and temperature registers */
1053         reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB);
1054         if (reg < 0 || (reg & 0x1f))
1055                 return -ENODEV;
1056
1057         reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
1058         if (reg < 0 || (reg & 0x3f))
1059                 return -ENODEV;
1060
1061         reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
1062         if (reg < 0 || (reg & 0x3f))
1063                 return -ENODEV;
1064
1065         strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
1066         return 0;
1067 }
1068
1069 static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
1070 {
1071         return (reg != REG_BANK && reg <= 0x20) ||
1072                 (reg >= REG_PWM(0) && reg <= REG_PWM(2));
1073 }
1074
1075 static const struct regmap_config nct7802_regmap_config = {
1076         .reg_bits = 8,
1077         .val_bits = 8,
1078         .cache_type = REGCACHE_RBTREE,
1079         .volatile_reg = nct7802_regmap_is_volatile,
1080 };
1081
1082 static int nct7802_init_chip(struct nct7802_data *data)
1083 {
1084         int err;
1085
1086         /* Enable ADC */
1087         err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
1088         if (err)
1089                 return err;
1090
1091         /* Enable local temperature sensor */
1092         err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
1093         if (err)
1094                 return err;
1095
1096         /* Enable Vcore and VCC voltage monitoring */
1097         return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
1098 }
1099
1100 static int nct7802_probe(struct i2c_client *client,
1101                          const struct i2c_device_id *id)
1102 {
1103         struct device *dev = &client->dev;
1104         struct nct7802_data *data;
1105         struct device *hwmon_dev;
1106         int ret;
1107
1108         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1109         if (data == NULL)
1110                 return -ENOMEM;
1111
1112         data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
1113         if (IS_ERR(data->regmap))
1114                 return PTR_ERR(data->regmap);
1115
1116         mutex_init(&data->access_lock);
1117
1118         ret = nct7802_init_chip(data);
1119         if (ret < 0)
1120                 return ret;
1121
1122         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1123                                                            data,
1124                                                            nct7802_groups);
1125         return PTR_ERR_OR_ZERO(hwmon_dev);
1126 }
1127
1128 static const unsigned short nct7802_address_list[] = {
1129         0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1130 };
1131
1132 static const struct i2c_device_id nct7802_idtable[] = {
1133         { "nct7802", 0 },
1134         { }
1135 };
1136 MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1137
1138 static struct i2c_driver nct7802_driver = {
1139         .class = I2C_CLASS_HWMON,
1140         .driver = {
1141                 .name = DRVNAME,
1142         },
1143         .detect = nct7802_detect,
1144         .probe = nct7802_probe,
1145         .id_table = nct7802_idtable,
1146         .address_list = nct7802_address_list,
1147 };
1148
1149 module_i2c_driver(nct7802_driver);
1150
1151 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1152 MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1153 MODULE_LICENSE("GPL v2");