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hwmon: (lm70) add device tree support
[mirror_ubuntu-zesty-kernel.git] / drivers / hwmon / nct7802.c
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3434f378
GR		 1/*
2 * nct7802 - Driver for Nuvoton NCT7802Y
3 *
4 * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/err.h>
20#include <linux/i2c.h>
21#include <linux/init.h>
22#include <linux/hwmon.h>
23#include <linux/hwmon-sysfs.h>
24#include <linux/jiffies.h>
25#include <linux/module.h>
26#include <linux/mutex.h>
27#include <linux/regmap.h>
28#include <linux/slab.h>
29
30#define DRVNAME "nct7802"
31
32static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e };
33
34static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = {
35 { 0x40, 0x00, 0x42, 0x44, 0x46 },
36 { 0x3f, 0x00, 0x41, 0x43, 0x45 },
37};
38
39static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 };
40
41static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = {
42 { 0, 0, 4, 0, 4 },
43 { 2, 0, 6, 2, 6 },
44};
45
46#define REG_BANK 0x00
47#define REG_TEMP_LSB 0x05
48#define REG_TEMP_PECI_LSB 0x08
49#define REG_VOLTAGE_LOW 0x0f
50#define REG_FANCOUNT_LOW 0x13
51#define REG_START 0x21
fcdc5739 52#define REG_MODE 0x22 /* 7.2.32 Mode Selection Register */
3434f378
GR		 53#define REG_PECI_ENABLE 0x23
54#define REG_FAN_ENABLE 0x24
55#define REG_VMON_ENABLE 0x25
5102f022
CS		 56#define REG_SMARTFAN_EN(x) (0x64 + (x) / 2)
57#define SMARTFAN_EN_SHIFT(x) ((x) % 2 * 4)
3434f378
GR		 58#define REG_VENDOR_ID 0xfd
59#define REG_CHIP_ID 0xfe
60#define REG_VERSION_ID 0xff
61
62/*
63 * Data structures and manipulation thereof
64 */
65
66struct nct7802_data {
67 struct regmap *regmap;
68 struct mutex access_lock; /* for multi-byte read and write operations */
69};
70
fcdc5739
CS		 71static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
72 char *buf)
73{
74 struct nct7802_data *data = dev_get_drvdata(dev);
75 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
76 unsigned int mode;
77 int ret;
78
79 ret = regmap_read(data->regmap, REG_MODE, &mode);
80 if (ret < 0)
81 return ret;
82
83 return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2);
84}
85
86static ssize_t store_temp_type(struct device *dev,
87 struct device_attribute *attr,
88 const char *buf, size_t count)
89{
90 struct nct7802_data *data = dev_get_drvdata(dev);
91 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
92 unsigned int type;
93 int err;
94
95 err = kstrtouint(buf, 0, &type);
96 if (err < 0)
97 return err;
98 if (sattr->index == 2 && type != 4) /* RD3 */
99 return -EINVAL;
100 if (type < 3 || type > 4)
101 return -EINVAL;
102 err = regmap_update_bits(data->regmap, REG_MODE,
103 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index);
104 return err ? : count;
105}
106
876420e0
CS		 107static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
108 char *buf)
109{
110 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
111 struct nct7802_data *data = dev_get_drvdata(dev);
112 unsigned int regval;
113 int ret;
114
115 if (sattr->index > 1)
116 return sprintf(buf, "1\n");
117
118 ret = regmap_read(data->regmap, 0x5E, &regval);
119 if (ret < 0)
120 return ret;
121
122 return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
123}
124
ea33597c
CS		 125static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
126 char *buf)
127{
128 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
129 struct nct7802_data *data = dev_get_drvdata(dev);
130 unsigned int val;
131 int ret;
132
133 ret = regmap_read(data->regmap, attr->index, &val);
134 if (ret < 0)
135 return ret;
136
137 return sprintf(buf, "%d\n", val);
138}
139
140static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr,
141 const char *buf, size_t count)
142{
143 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
144 struct nct7802_data *data = dev_get_drvdata(dev);
145 int err;
146 u8 val;
147
148 err = kstrtou8(buf, 0, &val);
149 if (err < 0)
150 return err;
151
152 err = regmap_write(data->regmap, attr->index, val);
153 return err ? : count;
154}
fcdc5739 155
5102f022
CS		 156static ssize_t show_pwm_enable(struct device *dev,
157 struct device_attribute *attr, char *buf)
158{
159 struct nct7802_data *data = dev_get_drvdata(dev);
160 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
161 unsigned int reg, enabled;
162 int ret;
163
164 ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), &reg);
165 if (ret < 0)
166 return ret;
167 enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1;
168 return sprintf(buf, "%u\n", enabled + 1);
169}
170
171static ssize_t store_pwm_enable(struct device *dev,
172 struct device_attribute *attr,
173 const char *buf, size_t count)
174{
175 struct nct7802_data *data = dev_get_drvdata(dev);
176 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
177 u8 val;
178 int ret;
179
180 ret = kstrtou8(buf, 0, &val);
181 if (ret < 0)
182 return ret;
183 if (val < 1 || val > 2)
184 return -EINVAL;
185 ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index),
186 1 << SMARTFAN_EN_SHIFT(sattr->index),
187 (val - 1) << SMARTFAN_EN_SHIFT(sattr->index));
188 return ret ? : count;
189}
190
3434f378
GR		 191static int nct7802_read_temp(struct nct7802_data *data,
192 u8 reg_temp, u8 reg_temp_low, int *temp)
193{
194 unsigned int t1, t2 = 0;
195 int err;
196
197 *temp = 0;
198
199 mutex_lock(&data->access_lock);
200 err = regmap_read(data->regmap, reg_temp, &t1);
201 if (err < 0)
202 goto abort;
203 t1 <<= 8;
204 if (reg_temp_low) { /* 11 bit data */
205 err = regmap_read(data->regmap, reg_temp_low, &t2);
206 if (err < 0)
207 goto abort;
208 }
209 t1 |= t2 & 0xe0;
210 *temp = (s16)t1 / 32 * 125;
211abort:
212 mutex_unlock(&data->access_lock);
213 return err;
214}
215
216static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan)
217{
218 unsigned int f1, f2;
219 int ret;
220
221 mutex_lock(&data->access_lock);
222 ret = regmap_read(data->regmap, reg_fan, &f1);
223 if (ret < 0)
224 goto abort;
225 ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2);
226 if (ret < 0)
227 goto abort;
228 ret = (f1 << 5) | (f2 >> 3);
229 /* convert fan count to rpm */
230 if (ret == 0x1fff) /* maximum value, assume fan is stopped */
231 ret = 0;
232 else if (ret)
233 ret = DIV_ROUND_CLOSEST(1350000U, ret);
234abort:
235 mutex_unlock(&data->access_lock);
236 return ret;
237}
238
239static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low,
240 u8 reg_fan_high)
241{
242 unsigned int f1, f2;
243 int ret;
244
245 mutex_lock(&data->access_lock);
246 ret = regmap_read(data->regmap, reg_fan_low, &f1);
247 if (ret < 0)
248 goto abort;
249 ret = regmap_read(data->regmap, reg_fan_high, &f2);
250 if (ret < 0)
251 goto abort;
252 ret = f1 | ((f2 & 0xf8) << 5);
253 /* convert fan count to rpm */
254 if (ret == 0x1fff) /* maximum value, assume no limit */
255 ret = 0;
256 else if (ret)
257 ret = DIV_ROUND_CLOSEST(1350000U, ret);
258abort:
259 mutex_unlock(&data->access_lock);
260 return ret;
261}
262
263static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low,
264 u8 reg_fan_high, unsigned int limit)
265{
266 int err;
267
268 if (limit)
269 limit = DIV_ROUND_CLOSEST(1350000U, limit);
270 else
271 limit = 0x1fff;
272 limit = clamp_val(limit, 0, 0x1fff);
273
274 mutex_lock(&data->access_lock);
275 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
276 if (err < 0)
277 goto abort;
278
279 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
280abort:
281 mutex_unlock(&data->access_lock);
282 return err;
283}
284
285static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 };
286
287static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index)
288{
289 unsigned int v1, v2;
290 int ret;
291
292 mutex_lock(&data->access_lock);
293 if (index == 0) { /* voltage */
294 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1);
295 if (ret < 0)
296 goto abort;
297 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2);
298 if (ret < 0)
299 goto abort;
300 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr];
301 } else { /* limit */
302 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
303
304 ret = regmap_read(data->regmap,
305 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1);
306 if (ret < 0)
307 goto abort;
308 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
309 &v2);
310 if (ret < 0)
311 goto abort;
312 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr];
313 }
314abort:
315 mutex_unlock(&data->access_lock);
316 return ret;
317}
318
319static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
9200bc4c 320 unsigned long voltage)
3434f378
GR		 321{
322 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
323 int err;
324
325 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
326 voltage = clamp_val(voltage, 0, 0x3ff);
327
328 mutex_lock(&data->access_lock);
329 err = regmap_write(data->regmap,
330 REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
331 voltage & 0xff);
332 if (err < 0)
333 goto abort;
334
335 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
336 0x0300 >> shift, (voltage & 0x0300) >> shift);
337abort:
338 mutex_unlock(&data->access_lock);
339 return err;
340}
341
342static ssize_t show_in(struct device *dev, struct device_attribute *attr,
343 char *buf)
344{
345 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
346 struct nct7802_data *data = dev_get_drvdata(dev);
347 int voltage;
348
349 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
350 if (voltage < 0)
351 return voltage;
352
353 return sprintf(buf, "%d\n", voltage);
354}
355
356static ssize_t store_in(struct device *dev, struct device_attribute *attr,
357 const char *buf, size_t count)
358{
359 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
360 struct nct7802_data *data = dev_get_drvdata(dev);
361 int index = sattr->index;
362 int nr = sattr->nr;
363 unsigned long val;
364 int err;
365
366 err = kstrtoul(buf, 10, &val);
367 if (err < 0)
368 return err;
369
370 err = nct7802_write_voltage(data, nr, index, val);
371 return err ? : count;
372}
373
374static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
375 char *buf)
376{
377 struct nct7802_data *data = dev_get_drvdata(dev);
378 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
379 int err, temp;
380
381 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
382 if (err < 0)
383 return err;
384
385 return sprintf(buf, "%d\n", temp);
386}
387
388static ssize_t store_temp(struct device *dev, struct device_attribute *attr,
389 const char *buf, size_t count)
390{
391 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
392 struct nct7802_data *data = dev_get_drvdata(dev);
393 int nr = sattr->nr;
394 long val;
395 int err;
396
397 err = kstrtol(buf, 10, &val);
398 if (err < 0)
399 return err;
400
401 val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127);
402
403 err = regmap_write(data->regmap, nr, val & 0xff);
404 return err ? : count;
405}
406
407static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
408 char *buf)
409{
410 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
411 struct nct7802_data *data = dev_get_drvdata(dev);
412 int speed;
413
414 speed = nct7802_read_fan(data, sattr->index);
415 if (speed < 0)
416 return speed;
417
418 return sprintf(buf, "%d\n", speed);
419}
420
421static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
422 char *buf)
423{
424 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
425 struct nct7802_data *data = dev_get_drvdata(dev);
426 int speed;
427
428 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
429 if (speed < 0)
430 return speed;
431
432 return sprintf(buf, "%d\n", speed);
433}
434
435static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr,
436 const char *buf, size_t count)
437{
438 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
439 struct nct7802_data *data = dev_get_drvdata(dev);
440 unsigned long val;
441 int err;
442
443 err = kstrtoul(buf, 10, &val);
444 if (err < 0)
445 return err;
446
447 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
448 return err ? : count;
449}
450
451static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
452 char *buf)
453{
454 struct nct7802_data *data = dev_get_drvdata(dev);
455 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
456 int bit = sattr->index;
457 unsigned int val;
458 int ret;
459
460 ret = regmap_read(data->regmap, sattr->nr, &val);
461 if (ret < 0)
462 return ret;
463
464 return sprintf(buf, "%u\n", !!(val & (1 << bit)));
465}
466
467static ssize_t
468show_beep(struct device *dev, struct device_attribute *attr, char *buf)
469{
470 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
471 struct nct7802_data *data = dev_get_drvdata(dev);
472 unsigned int regval;
473 int err;
474
475 err = regmap_read(data->regmap, sattr->nr, &regval);
476 if (err)
477 return err;
478
479 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
480}
481
482static ssize_t
483store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
484 size_t count)
485{
486 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
487 struct nct7802_data *data = dev_get_drvdata(dev);
488 unsigned long val;
489 int err;
490
491 err = kstrtoul(buf, 10, &val);
492 if (err < 0)
493 return err;
494 if (val > 1)
495 return -EINVAL;
496
497 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
498 val ? 1 << sattr->index : 0);
499 return err ? : count;
500}
501
fcdc5739
CS		 502static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
503 show_temp_type, store_temp_type, 0);
3434f378
GR		 504static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01,
505 REG_TEMP_LSB);
506static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp,
507 store_temp, 0x31, 0);
508static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp,
509 store_temp, 0x30, 0);
510static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp,
511 store_temp, 0x3a, 0);
512
fcdc5739
CS		 513static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
514 show_temp_type, store_temp_type, 1);
3434f378
GR		 515static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02,
516 REG_TEMP_LSB);
517static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp,
518 store_temp, 0x33, 0);
519static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp,
520 store_temp, 0x32, 0);
521static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp,
522 store_temp, 0x3b, 0);
523
fcdc5739
CS		 524static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
525 show_temp_type, store_temp_type, 2);
3434f378
GR		 526static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03,
527 REG_TEMP_LSB);
528static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp,
529 store_temp, 0x35, 0);
530static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp,
531 store_temp, 0x34, 0);
532static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp,
533 store_temp, 0x3c, 0);
534
535static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0);
536static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp,
537 store_temp, 0x37, 0);
538static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp,
539 store_temp, 0x36, 0);
540static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp,
541 store_temp, 0x3d, 0);
542
543static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06,
544 REG_TEMP_PECI_LSB);
545static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp,
546 store_temp, 0x39, 0);
547static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp,
548 store_temp, 0x38, 0);
549static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp,
550 store_temp, 0x3e, 0);
551
552static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07,
553 REG_TEMP_PECI_LSB);
554
555static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
556 0x18, 0);
557static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL,
558 0x18, 1);
559static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL,
560 0x18, 2);
561static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL,
562 0x18, 3);
563static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL,
564 0x18, 4);
565
566static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
567 0x19, 0);
568static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL,
569 0x19, 1);
570static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL,
571 0x19, 2);
572static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL,
573 0x19, 3);
574static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL,
575 0x19, 4);
576
577static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
578 0x1b, 0);
579static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL,
580 0x1b, 1);
581static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL,
582 0x1b, 2);
583static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL,
584 0x1b, 3);
585static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL,
586 0x1b, 4);
587
588static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0);
589static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1);
590static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2);
591
592static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep,
593 store_beep, 0x5c, 0);
594static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep,
595 store_beep, 0x5c, 1);
596static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep,
597 store_beep, 0x5c, 2);
598static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep,
599 store_beep, 0x5c, 3);
600static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep,
601 store_beep, 0x5c, 4);
602static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep,
603 store_beep, 0x5c, 5);
604
605static struct attribute *nct7802_temp_attrs[] = {
fcdc5739 606 &sensor_dev_attr_temp1_type.dev_attr.attr,
3434f378
GR		 607 &sensor_dev_attr_temp1_input.dev_attr.attr,
608 &sensor_dev_attr_temp1_min.dev_attr.attr,
609 &sensor_dev_attr_temp1_max.dev_attr.attr,
610 &sensor_dev_attr_temp1_crit.dev_attr.attr,
611 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
612 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
613 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
614 &sensor_dev_attr_temp1_fault.dev_attr.attr,
615 &sensor_dev_attr_temp1_beep.dev_attr.attr,
616
fcdc5739
CS		 617 &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */
618 &sensor_dev_attr_temp2_input.dev_attr.attr,
3434f378
GR		 619 &sensor_dev_attr_temp2_min.dev_attr.attr,
620 &sensor_dev_attr_temp2_max.dev_attr.attr,
621 &sensor_dev_attr_temp2_crit.dev_attr.attr,
622 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
623 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
624 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
625 &sensor_dev_attr_temp2_fault.dev_attr.attr,
626 &sensor_dev_attr_temp2_beep.dev_attr.attr,
627
fcdc5739
CS		 628 &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */
629 &sensor_dev_attr_temp3_input.dev_attr.attr,
3434f378
GR		 630 &sensor_dev_attr_temp3_min.dev_attr.attr,
631 &sensor_dev_attr_temp3_max.dev_attr.attr,
632 &sensor_dev_attr_temp3_crit.dev_attr.attr,
633 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
634 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
635 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
636 &sensor_dev_attr_temp3_fault.dev_attr.attr,
637 &sensor_dev_attr_temp3_beep.dev_attr.attr,
638
fcdc5739 639 &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */
3434f378
GR		 640 &sensor_dev_attr_temp4_min.dev_attr.attr,
641 &sensor_dev_attr_temp4_max.dev_attr.attr,
642 &sensor_dev_attr_temp4_crit.dev_attr.attr,
643 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
644 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
645 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
646 &sensor_dev_attr_temp4_beep.dev_attr.attr,
647
fcdc5739 648 &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */
3434f378
GR		 649 &sensor_dev_attr_temp5_min.dev_attr.attr,
650 &sensor_dev_attr_temp5_max.dev_attr.attr,
651 &sensor_dev_attr_temp5_crit.dev_attr.attr,
652 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
653 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
654 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
655 &sensor_dev_attr_temp5_beep.dev_attr.attr,
656
fcdc5739 657 &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */
3434f378
GR		 658 &sensor_dev_attr_temp6_beep.dev_attr.attr,
659
660 NULL
661};
662
663static umode_t nct7802_temp_is_visible(struct kobject *kobj,
664 struct attribute *attr, int index)
665{
666 struct device *dev = container_of(kobj, struct device, kobj);
667 struct nct7802_data *data = dev_get_drvdata(dev);
668 unsigned int reg;
669 int err;
670
671 err = regmap_read(data->regmap, REG_MODE, &reg);
672 if (err < 0)
673 return 0;
674
fcdc5739 675 if (index < 10 &&
3434f378
GR		 676 (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */
677 return 0;
fcdc5739
CS		 678
679 if (index >= 10 && index < 20 &&
3434f378
GR		 680 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */
681 return 0;
fcdc5739 682 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */
3434f378 683 return 0;
fcdc5739
CS		 684
685 if (index >= 30 && index < 38) /* local */
3434f378
GR		 686 return attr->mode;
687
688 err = regmap_read(data->regmap, REG_PECI_ENABLE, &reg);
689 if (err < 0)
690 return 0;
691
fcdc5739 692 if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */
3434f378
GR		 693 return 0;
694
fcdc5739 695 if (index >= 0x46 && (!(reg & 0x02))) /* PECI 1 */
3434f378
GR		 696 return 0;
697
698 return attr->mode;
699}
700
701static struct attribute_group nct7802_temp_group = {
702 .attrs = nct7802_temp_attrs,
703 .is_visible = nct7802_temp_is_visible,
704};
705
706static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
707static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in,
708 0, 1);
709static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in,
710 0, 2);
711static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3);
712static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
713 0x5a, 3);
714
715static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
716
717static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
718static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in,
719 2, 1);
720static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in,
721 2, 2);
722static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0);
723static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
724 0x5a, 0);
725
726static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
727static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in,
728 3, 1);
729static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in,
730 3, 2);
731static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1);
732static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
733 0x5a, 1);
734
735static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
736static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in,
737 4, 1);
738static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in,
739 4, 2);
740static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2);
741static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
742 0x5a, 2);
743
744static struct attribute *nct7802_in_attrs[] = {
745 &sensor_dev_attr_in0_input.dev_attr.attr,
746 &sensor_dev_attr_in0_min.dev_attr.attr,
747 &sensor_dev_attr_in0_max.dev_attr.attr,
748 &sensor_dev_attr_in0_alarm.dev_attr.attr,
749 &sensor_dev_attr_in0_beep.dev_attr.attr,
750
751 &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */
752
753 &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */
754 &sensor_dev_attr_in2_min.dev_attr.attr,
755 &sensor_dev_attr_in2_max.dev_attr.attr,
756 &sensor_dev_attr_in2_alarm.dev_attr.attr,
757 &sensor_dev_attr_in2_beep.dev_attr.attr,
758
759 &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */
760 &sensor_dev_attr_in3_min.dev_attr.attr,
761 &sensor_dev_attr_in3_max.dev_attr.attr,
762 &sensor_dev_attr_in3_alarm.dev_attr.attr,
763 &sensor_dev_attr_in3_beep.dev_attr.attr,
764
765 &sensor_dev_attr_in4_input.dev_attr.attr, /* 17 */
766 &sensor_dev_attr_in4_min.dev_attr.attr,
767 &sensor_dev_attr_in4_max.dev_attr.attr,
768 &sensor_dev_attr_in4_alarm.dev_attr.attr,
769 &sensor_dev_attr_in4_beep.dev_attr.attr,
770
771 NULL,
772};
773
774static umode_t nct7802_in_is_visible(struct kobject *kobj,
775 struct attribute *attr, int index)
776{
777 struct device *dev = container_of(kobj, struct device, kobj);
778 struct nct7802_data *data = dev_get_drvdata(dev);
779 unsigned int reg;
780 int err;
781
782 if (index < 6) /* VCC, VCORE */
783 return attr->mode;
784
785 err = regmap_read(data->regmap, REG_MODE, &reg);
786 if (err < 0)
787 return 0;
788
789 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */
790 return 0;
791 if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c) /* VSEN2 */
792 return 0;
793 if (index >= 17 && (reg & 0x30) != 0x30) /* VSEN3 */
794 return 0;
795
796 return attr->mode;
797}
798
799static struct attribute_group nct7802_in_group = {
800 .attrs = nct7802_in_attrs,
801 .is_visible = nct7802_in_is_visible,
802};
803
804static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10);
805static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min,
806 store_fan_min, 0x49, 0x4c);
807static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0);
808static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
809 0x5b, 0);
810static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11);
811static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min,
812 store_fan_min, 0x4a, 0x4d);
813static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1);
814static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
815 0x5b, 1);
816static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12);
817static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min,
818 store_fan_min, 0x4b, 0x4e);
819static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2);
820static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
821 0x5b, 2);
822
876420e0
CS		 823/* 7.2.89 Fan Control Output Type */
824static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
825static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
826static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
827
ea33597c
CS		 828/* 7.2.91... Fan Control Output Value */
829static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x60);
830static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x61);
831static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x62);
832
5102f022
CS		 833/* 7.2.95... Temperature to Fan mapping Relationships Register */
834static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
835 store_pwm_enable, 0);
836static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
837 store_pwm_enable, 1);
838static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
839 store_pwm_enable, 2);
840
3434f378
GR		 841static struct attribute *nct7802_fan_attrs[] = {
842 &sensor_dev_attr_fan1_input.dev_attr.attr,
843 &sensor_dev_attr_fan1_min.dev_attr.attr,
844 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
845 &sensor_dev_attr_fan1_beep.dev_attr.attr,
846 &sensor_dev_attr_fan2_input.dev_attr.attr,
847 &sensor_dev_attr_fan2_min.dev_attr.attr,
848 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
849 &sensor_dev_attr_fan2_beep.dev_attr.attr,
850 &sensor_dev_attr_fan3_input.dev_attr.attr,
851 &sensor_dev_attr_fan3_min.dev_attr.attr,
852 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
853 &sensor_dev_attr_fan3_beep.dev_attr.attr,
854
855 NULL
856};
857
858static umode_t nct7802_fan_is_visible(struct kobject *kobj,
859 struct attribute *attr, int index)
860{
861 struct device *dev = container_of(kobj, struct device, kobj);
862 struct nct7802_data *data = dev_get_drvdata(dev);
863 int fan = index / 4; /* 4 attributes per fan */
864 unsigned int reg;
865 int err;
866
867 err = regmap_read(data->regmap, REG_FAN_ENABLE, &reg);
868 if (err < 0 || !(reg & (1 << fan)))
869 return 0;
870
871 return attr->mode;
872}
873
874static struct attribute_group nct7802_fan_group = {
875 .attrs = nct7802_fan_attrs,
876 .is_visible = nct7802_fan_is_visible,
877};
878
ea33597c 879static struct attribute *nct7802_pwm_attrs[] = {
5102f022 880 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
876420e0 881 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
ea33597c 882 &sensor_dev_attr_pwm1.dev_attr.attr,
5102f022 883 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
876420e0 884 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
ea33597c 885 &sensor_dev_attr_pwm2.dev_attr.attr,
5102f022 886 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
876420e0 887 &sensor_dev_attr_pwm3_mode.dev_attr.attr,
ea33597c
CS		 888 &sensor_dev_attr_pwm3.dev_attr.attr,
889 NULL
890};
891
892static struct attribute_group nct7802_pwm_group = {
893 .attrs = nct7802_pwm_attrs,
894};
895
3434f378
GR		 896static const struct attribute_group *nct7802_groups[] = {
897 &nct7802_temp_group,
898 &nct7802_in_group,
899 &nct7802_fan_group,
ea33597c 900 &nct7802_pwm_group,
3434f378
GR		 901 NULL
902};
903
904static int nct7802_detect(struct i2c_client *client,
905 struct i2c_board_info *info)
906{
907 int reg;
908
909 /*
910 * Chip identification registers are only available in bank 0,
911 * so only attempt chip detection if bank 0 is selected
912 */
913 reg = i2c_smbus_read_byte_data(client, REG_BANK);
914 if (reg != 0x00)
915 return -ENODEV;
916
917 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
918 if (reg != 0x50)
919 return -ENODEV;
920
921 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
922 if (reg != 0xc3)
923 return -ENODEV;
924
925 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
926 if (reg < 0 || (reg & 0xf0) != 0x20)
927 return -ENODEV;
928
929 /* Also validate lower bits of voltage and temperature registers */
930 reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB);
931 if (reg < 0 || (reg & 0x1f))
932 return -ENODEV;
933
934 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
935 if (reg < 0 || (reg & 0x3f))
936 return -ENODEV;
937
938 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
939 if (reg < 0 || (reg & 0x3f))
940 return -ENODEV;
941
942 strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
943 return 0;
944}
945
946static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
947{
948 return reg != REG_BANK && reg <= 0x20;
949}
950
3c535bca 951static const struct regmap_config nct7802_regmap_config = {
3434f378
GR		 952 .reg_bits = 8,
953 .val_bits = 8,
954 .cache_type = REGCACHE_RBTREE,
955 .volatile_reg = nct7802_regmap_is_volatile,
956};
957
958static int nct7802_init_chip(struct nct7802_data *data)
959{
960 int err;
961
962 /* Enable ADC */
963 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
964 if (err)
965 return err;
966
967 /* Enable local temperature sensor */
968 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
969 if (err)
970 return err;
971
972 /* Enable Vcore and VCC voltage monitoring */
973 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
974}
975
976static int nct7802_probe(struct i2c_client *client,
977 const struct i2c_device_id *id)
978{
979 struct device *dev = &client->dev;
980 struct nct7802_data *data;
981 struct device *hwmon_dev;
982 int ret;
983
984 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
985 if (data == NULL)
986 return -ENOMEM;
987
988 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
989 if (IS_ERR(data->regmap))
990 return PTR_ERR(data->regmap);
991
992 mutex_init(&data->access_lock);
993
994 ret = nct7802_init_chip(data);
995 if (ret < 0)
996 return ret;
997
998 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
999 data,
1000 nct7802_groups);
1001 return PTR_ERR_OR_ZERO(hwmon_dev);
1002}
1003
1004static const unsigned short nct7802_address_list[] = {
1005 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1006};
1007
1008static const struct i2c_device_id nct7802_idtable[] = {
1009 { "nct7802", 0 },
1010 { }
1011};
1012MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1013
1014static struct i2c_driver nct7802_driver = {
1015 .class = I2C_CLASS_HWMON,
1016 .driver = {
1017 .name = DRVNAME,
1018 },
1019 .detect = nct7802_detect,
1020 .probe = nct7802_probe,
1021 .id_table = nct7802_idtable,
1022 .address_list = nct7802_address_list,
1023};
1024
1025module_i2c_driver(nct7802_driver);
1026
1027MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1028MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1029MODULE_LICENSE("GPL v2");
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