1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * nct7802 - Driver for Nuvoton NCT7802Y
4 *
5 * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net>
6 */
7
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10 #include <linux/err.h>
11 #include <linux/i2c.h>
12 #include <linux/init.h>
13 #include <linux/hwmon.h>
14 #include <linux/hwmon-sysfs.h>
15 #include <linux/jiffies.h>
16 #include <linux/module.h>
17 #include <linux/mutex.h>
18 #include <linux/regmap.h>
19 #include <linux/slab.h>
20
21 #define DRVNAME "nct7802"
22
23 static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e };
24
25 static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = {
26 { 0x46, 0x00, 0x40, 0x42, 0x44 },
27 { 0x45, 0x00, 0x3f, 0x41, 0x43 },
28 };
29
30 static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 };
31
32 static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = {
33 { 0, 0, 4, 0, 4 },
34 { 2, 0, 6, 2, 6 },
35 };
36
37 #define REG_BANK 0x00
38 #define REG_TEMP_LSB 0x05
39 #define REG_TEMP_PECI_LSB 0x08
40 #define REG_VOLTAGE_LOW 0x0f
41 #define REG_FANCOUNT_LOW 0x13
42 #define REG_START 0x21
43 #define REG_MODE 0x22 /* 7.2.32 Mode Selection Register */
44 #define REG_PECI_ENABLE 0x23
45 #define REG_FAN_ENABLE 0x24
46 #define REG_VMON_ENABLE 0x25
47 #define REG_PWM(x) (0x60 + (x))
48 #define REG_SMARTFAN_EN(x) (0x64 + (x) / 2)
49 #define SMARTFAN_EN_SHIFT(x) ((x) % 2 * 4)
50 #define REG_VENDOR_ID 0xfd
51 #define REG_CHIP_ID 0xfe
52 #define REG_VERSION_ID 0xff
53
54 /*
55 * Data structures and manipulation thereof
56 */
57
58 struct nct7802_data {
59 struct regmap *regmap;
60 struct mutex access_lock; /* for multi-byte read and write operations */
61 u8 in_status;
62 struct mutex in_alarm_lock;
63 };
64
temp_type_show(struct device * dev,struct device_attribute * attr,char * buf)65 static ssize_t temp_type_show(struct device *dev,
66 struct device_attribute *attr, char *buf)
67 {
68 struct nct7802_data *data = dev_get_drvdata(dev);
69 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
70 unsigned int mode;
71 int ret;
72
73 ret = regmap_read(data->regmap, REG_MODE, &mode);
74 if (ret < 0)
75 return ret;
76
77 return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2);
78 }
79
temp_type_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)80 static ssize_t temp_type_store(struct device *dev,
81 struct device_attribute *attr, const char *buf,
82 size_t count)
83 {
84 struct nct7802_data *data = dev_get_drvdata(dev);
85 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
86 unsigned int type;
87 int err;
88
89 err = kstrtouint(buf, 0, &type);
90 if (err < 0)
91 return err;
92 if (sattr->index == 2 && type != 4) /* RD3 */
93 return -EINVAL;
94 if (type < 3 || type > 4)
95 return -EINVAL;
96 err = regmap_update_bits(data->regmap, REG_MODE,
97 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index);
98 return err ? : count;
99 }
100
pwm_mode_show(struct device * dev,struct device_attribute * attr,char * buf)101 static ssize_t pwm_mode_show(struct device *dev,
102 struct device_attribute *attr, char *buf)
103 {
104 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
105 struct nct7802_data *data = dev_get_drvdata(dev);
106 unsigned int regval;
107 int ret;
108
109 if (sattr->index > 1)
110 return sprintf(buf, "1\n");
111
112 ret = regmap_read(data->regmap, 0x5E, ®val);
113 if (ret < 0)
114 return ret;
115
116 return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
117 }
118
pwm_show(struct device * dev,struct device_attribute * devattr,char * buf)119 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
120 char *buf)
121 {
122 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
123 struct nct7802_data *data = dev_get_drvdata(dev);
124 unsigned int val;
125 int ret;
126
127 if (!attr->index)
128 return sprintf(buf, "255\n");
129
130 ret = regmap_read(data->regmap, attr->index, &val);
131 if (ret < 0)
132 return ret;
133
134 return sprintf(buf, "%d\n", val);
135 }
136
pwm_store(struct device * dev,struct device_attribute * devattr,const char * buf,size_t count)137 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
138 const char *buf, size_t count)
139 {
140 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
141 struct nct7802_data *data = dev_get_drvdata(dev);
142 int err;
143 u8 val;
144
145 err = kstrtou8(buf, 0, &val);
146 if (err < 0)
147 return err;
148
149 err = regmap_write(data->regmap, attr->index, val);
150 return err ? : count;
151 }
152
pwm_enable_show(struct device * dev,struct device_attribute * attr,char * buf)153 static ssize_t pwm_enable_show(struct device *dev,
154 struct device_attribute *attr, char *buf)
155 {
156 struct nct7802_data *data = dev_get_drvdata(dev);
157 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
158 unsigned int reg, enabled;
159 int ret;
160
161 ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), ®);
162 if (ret < 0)
163 return ret;
164 enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1;
165 return sprintf(buf, "%u\n", enabled + 1);
166 }
167
pwm_enable_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)168 static ssize_t pwm_enable_store(struct device *dev,
169 struct device_attribute *attr,
170 const char *buf, size_t count)
171 {
172 struct nct7802_data *data = dev_get_drvdata(dev);
173 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
174 u8 val;
175 int ret;
176
177 ret = kstrtou8(buf, 0, &val);
178 if (ret < 0)
179 return ret;
180 if (val < 1 || val > 2)
181 return -EINVAL;
182 ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index),
183 1 << SMARTFAN_EN_SHIFT(sattr->index),
184 (val - 1) << SMARTFAN_EN_SHIFT(sattr->index));
185 return ret ? : count;
186 }
187
nct7802_read_temp(struct nct7802_data * data,u8 reg_temp,u8 reg_temp_low,int * temp)188 static int nct7802_read_temp(struct nct7802_data *data,
189 u8 reg_temp, u8 reg_temp_low, int *temp)
190 {
191 unsigned int t1, t2 = 0;
192 int err;
193
194 *temp = 0;
195
196 mutex_lock(&data->access_lock);
197 err = regmap_read(data->regmap, reg_temp, &t1);
198 if (err < 0)
199 goto abort;
200 t1 <<= 8;
201 if (reg_temp_low) { /* 11 bit data */
202 err = regmap_read(data->regmap, reg_temp_low, &t2);
203 if (err < 0)
204 goto abort;
205 }
206 t1 |= t2 & 0xe0;
207 *temp = (s16)t1 / 32 * 125;
208 abort:
209 mutex_unlock(&data->access_lock);
210 return err;
211 }
212
nct7802_read_fan(struct nct7802_data * data,u8 reg_fan)213 static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan)
214 {
215 unsigned int f1, f2;
216 int ret;
217
218 mutex_lock(&data->access_lock);
219 ret = regmap_read(data->regmap, reg_fan, &f1);
220 if (ret < 0)
221 goto abort;
222 ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2);
223 if (ret < 0)
224 goto abort;
225 ret = (f1 << 5) | (f2 >> 3);
226 /* convert fan count to rpm */
227 if (ret == 0x1fff) /* maximum value, assume fan is stopped */
228 ret = 0;
229 else if (ret)
230 ret = DIV_ROUND_CLOSEST(1350000U, ret);
231 abort:
232 mutex_unlock(&data->access_lock);
233 return ret;
234 }
235
nct7802_read_fan_min(struct nct7802_data * data,u8 reg_fan_low,u8 reg_fan_high)236 static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low,
237 u8 reg_fan_high)
238 {
239 unsigned int f1, f2;
240 int ret;
241
242 mutex_lock(&data->access_lock);
243 ret = regmap_read(data->regmap, reg_fan_low, &f1);
244 if (ret < 0)
245 goto abort;
246 ret = regmap_read(data->regmap, reg_fan_high, &f2);
247 if (ret < 0)
248 goto abort;
249 ret = f1 | ((f2 & 0xf8) << 5);
250 /* convert fan count to rpm */
251 if (ret == 0x1fff) /* maximum value, assume no limit */
252 ret = 0;
253 else if (ret)
254 ret = DIV_ROUND_CLOSEST(1350000U, ret);
255 else
256 ret = 1350000U;
257 abort:
258 mutex_unlock(&data->access_lock);
259 return ret;
260 }
261
nct7802_write_fan_min(struct nct7802_data * data,u8 reg_fan_low,u8 reg_fan_high,unsigned long limit)262 static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low,
263 u8 reg_fan_high, unsigned long limit)
264 {
265 int err;
266
267 if (limit)
268 limit = DIV_ROUND_CLOSEST(1350000U, limit);
269 else
270 limit = 0x1fff;
271 limit = clamp_val(limit, 0, 0x1fff);
272
273 mutex_lock(&data->access_lock);
274 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
275 if (err < 0)
276 goto abort;
277
278 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
279 abort:
280 mutex_unlock(&data->access_lock);
281 return err;
282 }
283
284 static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 };
285
nct7802_read_voltage(struct nct7802_data * data,int nr,int index)286 static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index)
287 {
288 unsigned int v1, v2;
289 int ret;
290
291 mutex_lock(&data->access_lock);
292 if (index == 0) { /* voltage */
293 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1);
294 if (ret < 0)
295 goto abort;
296 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2);
297 if (ret < 0)
298 goto abort;
299 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr];
300 } else { /* limit */
301 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
302
303 ret = regmap_read(data->regmap,
304 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1);
305 if (ret < 0)
306 goto abort;
307 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
308 &v2);
309 if (ret < 0)
310 goto abort;
311 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr];
312 }
313 abort:
314 mutex_unlock(&data->access_lock);
315 return ret;
316 }
317
nct7802_write_voltage(struct nct7802_data * data,int nr,int index,unsigned long voltage)318 static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
319 unsigned long voltage)
320 {
321 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
322 int err;
323
324 voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]);
325 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
326
327 mutex_lock(&data->access_lock);
328 err = regmap_write(data->regmap,
329 REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
330 voltage & 0xff);
331 if (err < 0)
332 goto abort;
333
334 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
335 0x0300 >> shift, (voltage & 0x0300) >> shift);
336 abort:
337 mutex_unlock(&data->access_lock);
338 return err;
339 }
340
in_show(struct device * dev,struct device_attribute * attr,char * buf)341 static ssize_t in_show(struct device *dev, struct device_attribute *attr,
342 char *buf)
343 {
344 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
345 struct nct7802_data *data = dev_get_drvdata(dev);
346 int voltage;
347
348 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
349 if (voltage < 0)
350 return voltage;
351
352 return sprintf(buf, "%d\n", voltage);
353 }
354
in_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)355 static ssize_t in_store(struct device *dev, struct device_attribute *attr,
356 const char *buf, size_t count)
357 {
358 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
359 struct nct7802_data *data = dev_get_drvdata(dev);
360 int index = sattr->index;
361 int nr = sattr->nr;
362 unsigned long val;
363 int err;
364
365 err = kstrtoul(buf, 10, &val);
366 if (err < 0)
367 return err;
368
369 err = nct7802_write_voltage(data, nr, index, val);
370 return err ? : count;
371 }
372
in_alarm_show(struct device * dev,struct device_attribute * attr,char * buf)373 static ssize_t in_alarm_show(struct device *dev, struct device_attribute *attr,
374 char *buf)
375 {
376 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
377 struct nct7802_data *data = dev_get_drvdata(dev);
378 int volt, min, max, ret;
379 unsigned int val;
380
381 mutex_lock(&data->in_alarm_lock);
382
383 /*
384 * The SMI Voltage status register is the only register giving a status
385 * for voltages. A bit is set for each input crossing a threshold, in
386 * both direction, but the "inside" or "outside" limits info is not
387 * available. Also this register is cleared on read.
388 * Note: this is not explicitly spelled out in the datasheet, but
389 * from experiment.
390 * To deal with this we use a status cache with one validity bit and
391 * one status bit for each input. Validity is cleared at startup and
392 * each time the register reports a change, and the status is processed
393 * by software based on current input value and limits.
394 */
395 ret = regmap_read(data->regmap, 0x1e, &val); /* SMI Voltage status */
396 if (ret < 0)
397 goto abort;
398
399 /* invalidate cached status for all inputs crossing a threshold */
400 data->in_status &= ~((val & 0x0f) << 4);
401
402 /* if cached status for requested input is invalid, update it */
403 if (!(data->in_status & (0x10 << sattr->index))) {
404 ret = nct7802_read_voltage(data, sattr->nr, 0);
405 if (ret < 0)
406 goto abort;
407 volt = ret;
408
409 ret = nct7802_read_voltage(data, sattr->nr, 1);
410 if (ret < 0)
411 goto abort;
412 min = ret;
413
414 ret = nct7802_read_voltage(data, sattr->nr, 2);
415 if (ret < 0)
416 goto abort;
417 max = ret;
418
419 if (volt < min || volt > max)
420 data->in_status |= (1 << sattr->index);
421 else
422 data->in_status &= ~(1 << sattr->index);
423
424 data->in_status |= 0x10 << sattr->index;
425 }
426
427 ret = sprintf(buf, "%u\n", !!(data->in_status & (1 << sattr->index)));
428 abort:
429 mutex_unlock(&data->in_alarm_lock);
430 return ret;
431 }
432
temp_show(struct device * dev,struct device_attribute * attr,char * buf)433 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
434 char *buf)
435 {
436 struct nct7802_data *data = dev_get_drvdata(dev);
437 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
438 int err, temp;
439
440 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
441 if (err < 0)
442 return err;
443
444 return sprintf(buf, "%d\n", temp);
445 }
446
temp_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)447 static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
448 const char *buf, size_t count)
449 {
450 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
451 struct nct7802_data *data = dev_get_drvdata(dev);
452 int nr = sattr->nr;
453 long val;
454 int err;
455
456 err = kstrtol(buf, 10, &val);
457 if (err < 0)
458 return err;
459
460 val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000);
461
462 err = regmap_write(data->regmap, nr, val & 0xff);
463 return err ? : count;
464 }
465
fan_show(struct device * dev,struct device_attribute * attr,char * buf)466 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
467 char *buf)
468 {
469 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
470 struct nct7802_data *data = dev_get_drvdata(dev);
471 int speed;
472
473 speed = nct7802_read_fan(data, sattr->index);
474 if (speed < 0)
475 return speed;
476
477 return sprintf(buf, "%d\n", speed);
478 }
479
fan_min_show(struct device * dev,struct device_attribute * attr,char * buf)480 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
481 char *buf)
482 {
483 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
484 struct nct7802_data *data = dev_get_drvdata(dev);
485 int speed;
486
487 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
488 if (speed < 0)
489 return speed;
490
491 return sprintf(buf, "%d\n", speed);
492 }
493
fan_min_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)494 static ssize_t fan_min_store(struct device *dev,
495 struct device_attribute *attr, const char *buf,
496 size_t count)
497 {
498 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
499 struct nct7802_data *data = dev_get_drvdata(dev);
500 unsigned long val;
501 int err;
502
503 err = kstrtoul(buf, 10, &val);
504 if (err < 0)
505 return err;
506
507 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
508 return err ? : count;
509 }
510
alarm_show(struct device * dev,struct device_attribute * attr,char * buf)511 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
512 char *buf)
513 {
514 struct nct7802_data *data = dev_get_drvdata(dev);
515 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
516 int bit = sattr->index;
517 unsigned int val;
518 int ret;
519
520 ret = regmap_read(data->regmap, sattr->nr, &val);
521 if (ret < 0)
522 return ret;
523
524 return sprintf(buf, "%u\n", !!(val & (1 << bit)));
525 }
526
527 static ssize_t
beep_show(struct device * dev,struct device_attribute * attr,char * buf)528 beep_show(struct device *dev, struct device_attribute *attr, char *buf)
529 {
530 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
531 struct nct7802_data *data = dev_get_drvdata(dev);
532 unsigned int regval;
533 int err;
534
535 err = regmap_read(data->regmap, sattr->nr, ®val);
536 if (err)
537 return err;
538
539 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
540 }
541
542 static ssize_t
beep_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)543 beep_store(struct device *dev, struct device_attribute *attr, const char *buf,
544 size_t count)
545 {
546 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
547 struct nct7802_data *data = dev_get_drvdata(dev);
548 unsigned long val;
549 int err;
550
551 err = kstrtoul(buf, 10, &val);
552 if (err < 0)
553 return err;
554 if (val > 1)
555 return -EINVAL;
556
557 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
558 val ? 1 << sattr->index : 0);
559 return err ? : count;
560 }
561
562 static SENSOR_DEVICE_ATTR_RW(temp1_type, temp_type, 0);
563 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0x01, REG_TEMP_LSB);
564 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 0x31, 0);
565 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0x30, 0);
566 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0x3a, 0);
567
568 static SENSOR_DEVICE_ATTR_RW(temp2_type, temp_type, 1);
569 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0x02, REG_TEMP_LSB);
570 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 0x33, 0);
571 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 0x32, 0);
572 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 0x3b, 0);
573
574 static SENSOR_DEVICE_ATTR_RW(temp3_type, temp_type, 2);
575 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0x03, REG_TEMP_LSB);
576 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 0x35, 0);
577 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 0x34, 0);
578 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 0x3c, 0);
579
580 static SENSOR_DEVICE_ATTR_2_RO(temp4_input, temp, 0x04, 0);
581 static SENSOR_DEVICE_ATTR_2_RW(temp4_min, temp, 0x37, 0);
582 static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 0x36, 0);
583 static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 0x3d, 0);
584
585 static SENSOR_DEVICE_ATTR_2_RO(temp5_input, temp, 0x06, REG_TEMP_PECI_LSB);
586 static SENSOR_DEVICE_ATTR_2_RW(temp5_min, temp, 0x39, 0);
587 static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 0x38, 0);
588 static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 0x3e, 0);
589
590 static SENSOR_DEVICE_ATTR_2_RO(temp6_input, temp, 0x07, REG_TEMP_PECI_LSB);
591
592 static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, alarm, 0x18, 0);
593 static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, alarm, 0x18, 1);
594 static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, alarm, 0x18, 2);
595 static SENSOR_DEVICE_ATTR_2_RO(temp4_min_alarm, alarm, 0x18, 3);
596 static SENSOR_DEVICE_ATTR_2_RO(temp5_min_alarm, alarm, 0x18, 4);
597
598 static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, alarm, 0x19, 0);
599 static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, alarm, 0x19, 1);
600 static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, alarm, 0x19, 2);
601 static SENSOR_DEVICE_ATTR_2_RO(temp4_max_alarm, alarm, 0x19, 3);
602 static SENSOR_DEVICE_ATTR_2_RO(temp5_max_alarm, alarm, 0x19, 4);
603
604 static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, alarm, 0x1b, 0);
605 static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, alarm, 0x1b, 1);
606 static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, alarm, 0x1b, 2);
607 static SENSOR_DEVICE_ATTR_2_RO(temp4_crit_alarm, alarm, 0x1b, 3);
608 static SENSOR_DEVICE_ATTR_2_RO(temp5_crit_alarm, alarm, 0x1b, 4);
609
610 static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, alarm, 0x17, 0);
611 static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, alarm, 0x17, 1);
612 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, alarm, 0x17, 2);
613
614 static SENSOR_DEVICE_ATTR_2_RW(temp1_beep, beep, 0x5c, 0);
615 static SENSOR_DEVICE_ATTR_2_RW(temp2_beep, beep, 0x5c, 1);
616 static SENSOR_DEVICE_ATTR_2_RW(temp3_beep, beep, 0x5c, 2);
617 static SENSOR_DEVICE_ATTR_2_RW(temp4_beep, beep, 0x5c, 3);
618 static SENSOR_DEVICE_ATTR_2_RW(temp5_beep, beep, 0x5c, 4);
619 static SENSOR_DEVICE_ATTR_2_RW(temp6_beep, beep, 0x5c, 5);
620
621 static struct attribute *nct7802_temp_attrs[] = {
622 &sensor_dev_attr_temp1_type.dev_attr.attr,
623 &sensor_dev_attr_temp1_input.dev_attr.attr,
624 &sensor_dev_attr_temp1_min.dev_attr.attr,
625 &sensor_dev_attr_temp1_max.dev_attr.attr,
626 &sensor_dev_attr_temp1_crit.dev_attr.attr,
627 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
628 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
629 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
630 &sensor_dev_attr_temp1_fault.dev_attr.attr,
631 &sensor_dev_attr_temp1_beep.dev_attr.attr,
632
633 &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */
634 &sensor_dev_attr_temp2_input.dev_attr.attr,
635 &sensor_dev_attr_temp2_min.dev_attr.attr,
636 &sensor_dev_attr_temp2_max.dev_attr.attr,
637 &sensor_dev_attr_temp2_crit.dev_attr.attr,
638 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
639 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
640 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
641 &sensor_dev_attr_temp2_fault.dev_attr.attr,
642 &sensor_dev_attr_temp2_beep.dev_attr.attr,
643
644 &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */
645 &sensor_dev_attr_temp3_input.dev_attr.attr,
646 &sensor_dev_attr_temp3_min.dev_attr.attr,
647 &sensor_dev_attr_temp3_max.dev_attr.attr,
648 &sensor_dev_attr_temp3_crit.dev_attr.attr,
649 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
650 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
651 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
652 &sensor_dev_attr_temp3_fault.dev_attr.attr,
653 &sensor_dev_attr_temp3_beep.dev_attr.attr,
654
655 &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */
656 &sensor_dev_attr_temp4_min.dev_attr.attr,
657 &sensor_dev_attr_temp4_max.dev_attr.attr,
658 &sensor_dev_attr_temp4_crit.dev_attr.attr,
659 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
660 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
661 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
662 &sensor_dev_attr_temp4_beep.dev_attr.attr,
663
664 &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */
665 &sensor_dev_attr_temp5_min.dev_attr.attr,
666 &sensor_dev_attr_temp5_max.dev_attr.attr,
667 &sensor_dev_attr_temp5_crit.dev_attr.attr,
668 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
669 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
670 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
671 &sensor_dev_attr_temp5_beep.dev_attr.attr,
672
673 &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */
674 &sensor_dev_attr_temp6_beep.dev_attr.attr,
675
676 NULL
677 };
678
nct7802_temp_is_visible(struct kobject * kobj,struct attribute * attr,int index)679 static umode_t nct7802_temp_is_visible(struct kobject *kobj,
680 struct attribute *attr, int index)
681 {
682 struct device *dev = kobj_to_dev(kobj);
683 struct nct7802_data *data = dev_get_drvdata(dev);
684 unsigned int reg;
685 int err;
686
687 err = regmap_read(data->regmap, REG_MODE, ®);
688 if (err < 0)
689 return 0;
690
691 if (index < 10 &&
692 (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */
693 return 0;
694
695 if (index >= 10 && index < 20 &&
696 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */
697 return 0;
698 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */
699 return 0;
700
701 if (index >= 30 && index < 38) /* local */
702 return attr->mode;
703
704 err = regmap_read(data->regmap, REG_PECI_ENABLE, ®);
705 if (err < 0)
706 return 0;
707
708 if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */
709 return 0;
710
711 if (index >= 0x46 && (!(reg & 0x02))) /* PECI 1 */
712 return 0;
713
714 return attr->mode;
715 }
716
717 static const struct attribute_group nct7802_temp_group = {
718 .attrs = nct7802_temp_attrs,
719 .is_visible = nct7802_temp_is_visible,
720 };
721
722 static SENSOR_DEVICE_ATTR_2_RO(in0_input, in, 0, 0);
723 static SENSOR_DEVICE_ATTR_2_RW(in0_min, in, 0, 1);
724 static SENSOR_DEVICE_ATTR_2_RW(in0_max, in, 0, 2);
725 static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, in_alarm, 0, 3);
726 static SENSOR_DEVICE_ATTR_2_RW(in0_beep, beep, 0x5a, 3);
727
728 static SENSOR_DEVICE_ATTR_2_RO(in1_input, in, 1, 0);
729
730 static SENSOR_DEVICE_ATTR_2_RO(in2_input, in, 2, 0);
731 static SENSOR_DEVICE_ATTR_2_RW(in2_min, in, 2, 1);
732 static SENSOR_DEVICE_ATTR_2_RW(in2_max, in, 2, 2);
733 static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, in_alarm, 2, 0);
734 static SENSOR_DEVICE_ATTR_2_RW(in2_beep, beep, 0x5a, 0);
735
736 static SENSOR_DEVICE_ATTR_2_RO(in3_input, in, 3, 0);
737 static SENSOR_DEVICE_ATTR_2_RW(in3_min, in, 3, 1);
738 static SENSOR_DEVICE_ATTR_2_RW(in3_max, in, 3, 2);
739 static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, in_alarm, 3, 1);
740 static SENSOR_DEVICE_ATTR_2_RW(in3_beep, beep, 0x5a, 1);
741
742 static SENSOR_DEVICE_ATTR_2_RO(in4_input, in, 4, 0);
743 static SENSOR_DEVICE_ATTR_2_RW(in4_min, in, 4, 1);
744 static SENSOR_DEVICE_ATTR_2_RW(in4_max, in, 4, 2);
745 static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, in_alarm, 4, 2);
746 static SENSOR_DEVICE_ATTR_2_RW(in4_beep, beep, 0x5a, 2);
747
748 static struct attribute *nct7802_in_attrs[] = {
749 &sensor_dev_attr_in0_input.dev_attr.attr,
750 &sensor_dev_attr_in0_min.dev_attr.attr,
751 &sensor_dev_attr_in0_max.dev_attr.attr,
752 &sensor_dev_attr_in0_alarm.dev_attr.attr,
753 &sensor_dev_attr_in0_beep.dev_attr.attr,
754
755 &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */
756
757 &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */
758 &sensor_dev_attr_in2_min.dev_attr.attr,
759 &sensor_dev_attr_in2_max.dev_attr.attr,
760 &sensor_dev_attr_in2_alarm.dev_attr.attr,
761 &sensor_dev_attr_in2_beep.dev_attr.attr,
762
763 &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */
764 &sensor_dev_attr_in3_min.dev_attr.attr,
765 &sensor_dev_attr_in3_max.dev_attr.attr,
766 &sensor_dev_attr_in3_alarm.dev_attr.attr,
767 &sensor_dev_attr_in3_beep.dev_attr.attr,
768
769 &sensor_dev_attr_in4_input.dev_attr.attr, /* 16 */
770 &sensor_dev_attr_in4_min.dev_attr.attr,
771 &sensor_dev_attr_in4_max.dev_attr.attr,
772 &sensor_dev_attr_in4_alarm.dev_attr.attr,
773 &sensor_dev_attr_in4_beep.dev_attr.attr,
774
775 NULL,
776 };
777
nct7802_in_is_visible(struct kobject * kobj,struct attribute * attr,int index)778 static umode_t nct7802_in_is_visible(struct kobject *kobj,
779 struct attribute *attr, int index)
780 {
781 struct device *dev = kobj_to_dev(kobj);
782 struct nct7802_data *data = dev_get_drvdata(dev);
783 unsigned int reg;
784 int err;
785
786 if (index < 6) /* VCC, VCORE */
787 return attr->mode;
788
789 err = regmap_read(data->regmap, REG_MODE, ®);
790 if (err < 0)
791 return 0;
792
793 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */
794 return 0;
795 if (index >= 11 && index < 16 && (reg & 0x0c) != 0x0c) /* VSEN2 */
796 return 0;
797 if (index >= 16 && (reg & 0x30) != 0x30) /* VSEN3 */
798 return 0;
799
800 return attr->mode;
801 }
802
803 static const struct attribute_group nct7802_in_group = {
804 .attrs = nct7802_in_attrs,
805 .is_visible = nct7802_in_is_visible,
806 };
807
808 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0x10);
809 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, fan_min, 0x49, 0x4c);
810 static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, alarm, 0x1a, 0);
811 static SENSOR_DEVICE_ATTR_2_RW(fan1_beep, beep, 0x5b, 0);
812 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 0x11);
813 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, fan_min, 0x4a, 0x4d);
814 static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, alarm, 0x1a, 1);
815 static SENSOR_DEVICE_ATTR_2_RW(fan2_beep, beep, 0x5b, 1);
816 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 0x12);
817 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, fan_min, 0x4b, 0x4e);
818 static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, alarm, 0x1a, 2);
819 static SENSOR_DEVICE_ATTR_2_RW(fan3_beep, beep, 0x5b, 2);
820
821 /* 7.2.89 Fan Control Output Type */
822 static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0);
823 static SENSOR_DEVICE_ATTR_RO(pwm2_mode, pwm_mode, 1);
824 static SENSOR_DEVICE_ATTR_RO(pwm3_mode, pwm_mode, 2);
825
826 /* 7.2.91... Fan Control Output Value */
827 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, REG_PWM(0));
828 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, REG_PWM(1));
829 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, REG_PWM(2));
830
831 /* 7.2.95... Temperature to Fan mapping Relationships Register */
832 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
833 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
834 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
835
836 static struct attribute *nct7802_fan_attrs[] = {
837 &sensor_dev_attr_fan1_input.dev_attr.attr,
838 &sensor_dev_attr_fan1_min.dev_attr.attr,
839 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
840 &sensor_dev_attr_fan1_beep.dev_attr.attr,
841 &sensor_dev_attr_fan2_input.dev_attr.attr,
842 &sensor_dev_attr_fan2_min.dev_attr.attr,
843 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
844 &sensor_dev_attr_fan2_beep.dev_attr.attr,
845 &sensor_dev_attr_fan3_input.dev_attr.attr,
846 &sensor_dev_attr_fan3_min.dev_attr.attr,
847 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
848 &sensor_dev_attr_fan3_beep.dev_attr.attr,
849
850 NULL
851 };
852
nct7802_fan_is_visible(struct kobject * kobj,struct attribute * attr,int index)853 static umode_t nct7802_fan_is_visible(struct kobject *kobj,
854 struct attribute *attr, int index)
855 {
856 struct device *dev = kobj_to_dev(kobj);
857 struct nct7802_data *data = dev_get_drvdata(dev);
858 int fan = index / 4; /* 4 attributes per fan */
859 unsigned int reg;
860 int err;
861
862 err = regmap_read(data->regmap, REG_FAN_ENABLE, ®);
863 if (err < 0 || !(reg & (1 << fan)))
864 return 0;
865
866 return attr->mode;
867 }
868
869 static const struct attribute_group nct7802_fan_group = {
870 .attrs = nct7802_fan_attrs,
871 .is_visible = nct7802_fan_is_visible,
872 };
873
874 static struct attribute *nct7802_pwm_attrs[] = {
875 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
876 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
877 &sensor_dev_attr_pwm1.dev_attr.attr,
878 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
879 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
880 &sensor_dev_attr_pwm2.dev_attr.attr,
881 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
882 &sensor_dev_attr_pwm3_mode.dev_attr.attr,
883 &sensor_dev_attr_pwm3.dev_attr.attr,
884 NULL
885 };
886
887 static const struct attribute_group nct7802_pwm_group = {
888 .attrs = nct7802_pwm_attrs,
889 };
890
891 /* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */
892 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_temp, temp, 0x80, 0);
893 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_temp, temp, 0x81, 0);
894 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point3_temp, temp, 0x82, 0);
895 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point4_temp, temp, 0x83, 0);
896 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point5_temp, temp, 0x84, 0);
897
898 /* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */
899 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm, 0x85);
900 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm, 0x86);
901 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point3_pwm, pwm, 0x87);
902 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point4_pwm, pwm, 0x88);
903 static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point5_pwm, pwm, 0);
904
905 /* 7.2.124 Table 2 X-axis Transition Point 1 Register */
906 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_temp, temp, 0x90, 0);
907 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_temp, temp, 0x91, 0);
908 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point3_temp, temp, 0x92, 0);
909 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point4_temp, temp, 0x93, 0);
910 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point5_temp, temp, 0x94, 0);
911
912 /* 7.2.129 Table 2 Y-axis Transition Point 1 Register */
913 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm, 0x95);
914 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm, 0x96);
915 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point3_pwm, pwm, 0x97);
916 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point4_pwm, pwm, 0x98);
917 static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point5_pwm, pwm, 0);
918
919 /* 7.2.133 Table 3 X-axis Transition Point 1 Register */
920 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_temp, temp, 0xA0, 0);
921 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_temp, temp, 0xA1, 0);
922 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point3_temp, temp, 0xA2, 0);
923 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point4_temp, temp, 0xA3, 0);
924 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point5_temp, temp, 0xA4, 0);
925
926 /* 7.2.138 Table 3 Y-axis Transition Point 1 Register */
927 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm, 0xA5);
928 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm, 0xA6);
929 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point3_pwm, pwm, 0xA7);
930 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point4_pwm, pwm, 0xA8);
931 static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point5_pwm, pwm, 0);
932
933 static struct attribute *nct7802_auto_point_attrs[] = {
934 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
935 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
936 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
937 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
938 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
939
940 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
941 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
942 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
943 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
944 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
945
946 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
947 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
948 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
949 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
950 &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
951
952 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
953 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
954 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
955 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
956 &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
957
958 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
959 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
960 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
961 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
962 &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr,
963
964 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
965 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
966 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
967 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
968 &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr,
969
970 NULL
971 };
972
973 static const struct attribute_group nct7802_auto_point_group = {
974 .attrs = nct7802_auto_point_attrs,
975 };
976
977 static const struct attribute_group *nct7802_groups[] = {
978 &nct7802_temp_group,
979 &nct7802_in_group,
980 &nct7802_fan_group,
981 &nct7802_pwm_group,
982 &nct7802_auto_point_group,
983 NULL
984 };
985
nct7802_detect(struct i2c_client * client,struct i2c_board_info * info)986 static int nct7802_detect(struct i2c_client *client,
987 struct i2c_board_info *info)
988 {
989 int reg;
990
991 /*
992 * Chip identification registers are only available in bank 0,
993 * so only attempt chip detection if bank 0 is selected
994 */
995 reg = i2c_smbus_read_byte_data(client, REG_BANK);
996 if (reg != 0x00)
997 return -ENODEV;
998
999 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
1000 if (reg != 0x50)
1001 return -ENODEV;
1002
1003 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
1004 if (reg != 0xc3)
1005 return -ENODEV;
1006
1007 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
1008 if (reg < 0 || (reg & 0xf0) != 0x20)
1009 return -ENODEV;
1010
1011 /* Also validate lower bits of voltage and temperature registers */
1012 reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB);
1013 if (reg < 0 || (reg & 0x1f))
1014 return -ENODEV;
1015
1016 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
1017 if (reg < 0 || (reg & 0x3f))
1018 return -ENODEV;
1019
1020 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
1021 if (reg < 0 || (reg & 0x3f))
1022 return -ENODEV;
1023
1024 strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
1025 return 0;
1026 }
1027
nct7802_regmap_is_volatile(struct device * dev,unsigned int reg)1028 static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
1029 {
1030 return (reg != REG_BANK && reg <= 0x20) ||
1031 (reg >= REG_PWM(0) && reg <= REG_PWM(2));
1032 }
1033
1034 static const struct regmap_config nct7802_regmap_config = {
1035 .reg_bits = 8,
1036 .val_bits = 8,
1037 .cache_type = REGCACHE_RBTREE,
1038 .volatile_reg = nct7802_regmap_is_volatile,
1039 };
1040
nct7802_init_chip(struct nct7802_data * data)1041 static int nct7802_init_chip(struct nct7802_data *data)
1042 {
1043 int err;
1044
1045 /* Enable ADC */
1046 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
1047 if (err)
1048 return err;
1049
1050 /* Enable local temperature sensor */
1051 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
1052 if (err)
1053 return err;
1054
1055 /* Enable Vcore and VCC voltage monitoring */
1056 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
1057 }
1058
nct7802_probe(struct i2c_client * client)1059 static int nct7802_probe(struct i2c_client *client)
1060 {
1061 struct device *dev = &client->dev;
1062 struct nct7802_data *data;
1063 struct device *hwmon_dev;
1064 int ret;
1065
1066 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1067 if (data == NULL)
1068 return -ENOMEM;
1069
1070 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
1071 if (IS_ERR(data->regmap))
1072 return PTR_ERR(data->regmap);
1073
1074 mutex_init(&data->access_lock);
1075 mutex_init(&data->in_alarm_lock);
1076
1077 ret = nct7802_init_chip(data);
1078 if (ret < 0)
1079 return ret;
1080
1081 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1082 data,
1083 nct7802_groups);
1084 return PTR_ERR_OR_ZERO(hwmon_dev);
1085 }
1086
1087 static const unsigned short nct7802_address_list[] = {
1088 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1089 };
1090
1091 static const struct i2c_device_id nct7802_idtable[] = {
1092 { "nct7802", 0 },
1093 { }
1094 };
1095 MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1096
1097 static struct i2c_driver nct7802_driver = {
1098 .class = I2C_CLASS_HWMON,
1099 .driver = {
1100 .name = DRVNAME,
1101 },
1102 .detect = nct7802_detect,
1103 .probe_new = nct7802_probe,
1104 .id_table = nct7802_idtable,
1105 .address_list = nct7802_address_list,
1106 };
1107
1108 module_i2c_driver(nct7802_driver);
1109
1110 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1111 MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1112 MODULE_LICENSE("GPL v2");
1113
