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