projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cw1200: drop useless LIST_HEAD
[linux-2.6-block.git] / drivers / hwmon / nct7802.c
CommitLineData
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
1c6e8f6b 56#define REG_PWM(x) (0x60 + (x))
5102f022
CS		 57#define REG_SMARTFAN_EN(x) (0x64 + (x) / 2)
58#define SMARTFAN_EN_SHIFT(x) ((x) % 2 * 4)
3434f378
GR		 59#define REG_VENDOR_ID 0xfd
60#define REG_CHIP_ID 0xfe
61#define REG_VERSION_ID 0xff
62
63/*
64 * Data structures and manipulation thereof
65 */
66
67struct nct7802_data {
68 struct regmap *regmap;
69 struct mutex access_lock; /* for multi-byte read and write operations */
70};
71
4aabaf30
GR		 72static ssize_t temp_type_show(struct device *dev,
73 struct device_attribute *attr, char *buf)
fcdc5739
CS		 74{
75 struct nct7802_data *data = dev_get_drvdata(dev);
76 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
77 unsigned int mode;
78 int ret;
79
80 ret = regmap_read(data->regmap, REG_MODE, &mode);
81 if (ret < 0)
82 return ret;
83
84 return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2);
85}
86
4aabaf30
GR		 87static ssize_t temp_type_store(struct device *dev,
88 struct device_attribute *attr, const char *buf,
89 size_t count)
fcdc5739
CS		 90{
91 struct nct7802_data *data = dev_get_drvdata(dev);
92 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
93 unsigned int type;
94 int err;
95
96 err = kstrtouint(buf, 0, &type);
97 if (err < 0)
98 return err;
99 if (sattr->index == 2 && type != 4) /* RD3 */
100 return -EINVAL;
101 if (type < 3 || type > 4)
102 return -EINVAL;
103 err = regmap_update_bits(data->regmap, REG_MODE,
104 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index);
105 return err ? : count;
106}
107
4aabaf30
GR		 108static ssize_t pwm_mode_show(struct device *dev,
109 struct device_attribute *attr, char *buf)
876420e0
CS		 110{
111 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
112 struct nct7802_data *data = dev_get_drvdata(dev);
113 unsigned int regval;
114 int ret;
115
116 if (sattr->index > 1)
117 return sprintf(buf, "1\n");
118
119 ret = regmap_read(data->regmap, 0x5E, &regval);
120 if (ret < 0)
121 return ret;
122
123 return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
124}
125
4aabaf30 126static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
ea33597c
CS		 127 char *buf)
128{
129 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
130 struct nct7802_data *data = dev_get_drvdata(dev);
131 unsigned int val;
132 int ret;
133
1c6e8f6b
CS		 134 if (!attr->index)
135 return sprintf(buf, "255\n");
136
ea33597c
CS		 137 ret = regmap_read(data->regmap, attr->index, &val);
138 if (ret < 0)
139 return ret;
140
141 return sprintf(buf, "%d\n", val);
142}
143
4aabaf30 144static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
ea33597c
CS		 145 const char *buf, size_t count)
146{
147 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
148 struct nct7802_data *data = dev_get_drvdata(dev);
149 int err;
150 u8 val;
151
152 err = kstrtou8(buf, 0, &val);
153 if (err < 0)
154 return err;
155
156 err = regmap_write(data->regmap, attr->index, val);
157 return err ? : count;
158}
fcdc5739 159
4aabaf30 160static ssize_t pwm_enable_show(struct device *dev,
5102f022
CS		 161 struct device_attribute *attr, char *buf)
162{
163 struct nct7802_data *data = dev_get_drvdata(dev);
164 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
165 unsigned int reg, enabled;
166 int ret;
167
168 ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), &reg);
169 if (ret < 0)
170 return ret;
171 enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1;
172 return sprintf(buf, "%u\n", enabled + 1);
173}
174
4aabaf30 175static ssize_t pwm_enable_store(struct device *dev,
5102f022
CS		 176 struct device_attribute *attr,
177 const char *buf, size_t count)
178{
179 struct nct7802_data *data = dev_get_drvdata(dev);
180 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
181 u8 val;
182 int ret;
183
184 ret = kstrtou8(buf, 0, &val);
185 if (ret < 0)
186 return ret;
187 if (val < 1 || val > 2)
188 return -EINVAL;
189 ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index),
190 1 << SMARTFAN_EN_SHIFT(sattr->index),
191 (val - 1) << SMARTFAN_EN_SHIFT(sattr->index));
192 return ret ? : count;
193}
194
3434f378
GR		 195static int nct7802_read_temp(struct nct7802_data *data,
196 u8 reg_temp, u8 reg_temp_low, int *temp)
197{
198 unsigned int t1, t2 = 0;
199 int err;
200
201 *temp = 0;
202
203 mutex_lock(&data->access_lock);
204 err = regmap_read(data->regmap, reg_temp, &t1);
205 if (err < 0)
206 goto abort;
207 t1 <<= 8;
208 if (reg_temp_low) { /* 11 bit data */
209 err = regmap_read(data->regmap, reg_temp_low, &t2);
210 if (err < 0)
211 goto abort;
212 }
213 t1 |= t2 & 0xe0;
214 *temp = (s16)t1 / 32 * 125;
215abort:
216 mutex_unlock(&data->access_lock);
217 return err;
218}
219
220static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan)
221{
222 unsigned int f1, f2;
223 int ret;
224
225 mutex_lock(&data->access_lock);
226 ret = regmap_read(data->regmap, reg_fan, &f1);
227 if (ret < 0)
228 goto abort;
229 ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2);
230 if (ret < 0)
231 goto abort;
232 ret = (f1 << 5) | (f2 >> 3);
233 /* convert fan count to rpm */
234 if (ret == 0x1fff) /* maximum value, assume fan is stopped */
235 ret = 0;
236 else if (ret)
237 ret = DIV_ROUND_CLOSEST(1350000U, ret);
238abort:
239 mutex_unlock(&data->access_lock);
240 return ret;
241}
242
243static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low,
244 u8 reg_fan_high)
245{
246 unsigned int f1, f2;
247 int ret;
248
249 mutex_lock(&data->access_lock);
250 ret = regmap_read(data->regmap, reg_fan_low, &f1);
251 if (ret < 0)
252 goto abort;
253 ret = regmap_read(data->regmap, reg_fan_high, &f2);
254 if (ret < 0)
255 goto abort;
256 ret = f1 | ((f2 & 0xf8) << 5);
257 /* convert fan count to rpm */
258 if (ret == 0x1fff) /* maximum value, assume no limit */
259 ret = 0;
260 else if (ret)
261 ret = DIV_ROUND_CLOSEST(1350000U, ret);
c0d04e91
GR		 262 else
263 ret = 1350000U;
3434f378
GR		 264abort:
265 mutex_unlock(&data->access_lock);
266 return ret;
267}
268
269static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low,
c0d04e91 270 u8 reg_fan_high, unsigned long limit)
3434f378
GR		 271{
272 int err;
273
274 if (limit)
275 limit = DIV_ROUND_CLOSEST(1350000U, limit);
276 else
277 limit = 0x1fff;
278 limit = clamp_val(limit, 0, 0x1fff);
279
280 mutex_lock(&data->access_lock);
281 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
282 if (err < 0)
283 goto abort;
284
285 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
286abort:
287 mutex_unlock(&data->access_lock);
288 return err;
289}
290
291static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 };
292
293static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index)
294{
295 unsigned int v1, v2;
296 int ret;
297
298 mutex_lock(&data->access_lock);
299 if (index == 0) { /* voltage */
300 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1);
301 if (ret < 0)
302 goto abort;
303 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2);
304 if (ret < 0)
305 goto abort;
306 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr];
307 } else { /* limit */
308 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
309
310 ret = regmap_read(data->regmap,
311 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1);
312 if (ret < 0)
313 goto abort;
314 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
315 &v2);
316 if (ret < 0)
317 goto abort;
318 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr];
319 }
320abort:
321 mutex_unlock(&data->access_lock);
322 return ret;
323}
324
325static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
9200bc4c 326 unsigned long voltage)
3434f378
GR		 327{
328 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
329 int err;
330
c0d04e91 331 voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]);
3434f378 332 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
3434f378
GR		 333
334 mutex_lock(&data->access_lock);
335 err = regmap_write(data->regmap,
336 REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
337 voltage & 0xff);
338 if (err < 0)
339 goto abort;
340
341 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
342 0x0300 >> shift, (voltage & 0x0300) >> shift);
343abort:
344 mutex_unlock(&data->access_lock);
345 return err;
346}
347
4aabaf30 348static ssize_t in_show(struct device *dev, struct device_attribute *attr,
3434f378
GR		 349 char *buf)
350{
351 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
352 struct nct7802_data *data = dev_get_drvdata(dev);
353 int voltage;
354
355 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
356 if (voltage < 0)
357 return voltage;
358
359 return sprintf(buf, "%d\n", voltage);
360}
361
4aabaf30 362static ssize_t in_store(struct device *dev, struct device_attribute *attr,
3434f378
GR		 363 const char *buf, size_t count)
364{
365 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
366 struct nct7802_data *data = dev_get_drvdata(dev);
367 int index = sattr->index;
368 int nr = sattr->nr;
369 unsigned long val;
370 int err;
371
372 err = kstrtoul(buf, 10, &val);
373 if (err < 0)
374 return err;
375
376 err = nct7802_write_voltage(data, nr, index, val);
377 return err ? : count;
378}
379
4aabaf30 380static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
3434f378
GR		 381 char *buf)
382{
383 struct nct7802_data *data = dev_get_drvdata(dev);
384 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
385 int err, temp;
386
387 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
388 if (err < 0)
389 return err;
390
391 return sprintf(buf, "%d\n", temp);
392}
393
4aabaf30 394static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
3434f378
GR		 395 const char *buf, size_t count)
396{
397 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
398 struct nct7802_data *data = dev_get_drvdata(dev);
399 int nr = sattr->nr;
400 long val;
401 int err;
402
403 err = kstrtol(buf, 10, &val);
404 if (err < 0)
405 return err;
406
c0d04e91 407 val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000);
3434f378
GR		 408
409 err = regmap_write(data->regmap, nr, val & 0xff);
410 return err ? : count;
411}
412
4aabaf30 413static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
3434f378
GR		 414 char *buf)
415{
416 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
417 struct nct7802_data *data = dev_get_drvdata(dev);
418 int speed;
419
420 speed = nct7802_read_fan(data, sattr->index);
421 if (speed < 0)
422 return speed;
423
424 return sprintf(buf, "%d\n", speed);
425}
426
4aabaf30 427static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
3434f378
GR		 428 char *buf)
429{
430 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
431 struct nct7802_data *data = dev_get_drvdata(dev);
432 int speed;
433
434 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
435 if (speed < 0)
436 return speed;
437
438 return sprintf(buf, "%d\n", speed);
439}
440
4aabaf30
GR		 441static ssize_t fan_min_store(struct device *dev,
442 struct device_attribute *attr, const char *buf,
443 size_t count)
3434f378
GR		 444{
445 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
446 struct nct7802_data *data = dev_get_drvdata(dev);
447 unsigned long val;
448 int err;
449
450 err = kstrtoul(buf, 10, &val);
451 if (err < 0)
452 return err;
453
454 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
455 return err ? : count;
456}
457
4aabaf30 458static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
3434f378
GR		 459 char *buf)
460{
461 struct nct7802_data *data = dev_get_drvdata(dev);
462 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
463 int bit = sattr->index;
464 unsigned int val;
465 int ret;
466
467 ret = regmap_read(data->regmap, sattr->nr, &val);
468 if (ret < 0)
469 return ret;
470
471 return sprintf(buf, "%u\n", !!(val & (1 << bit)));
472}
473
474static ssize_t
4aabaf30 475beep_show(struct device *dev, struct device_attribute *attr, char *buf)
3434f378
GR		 476{
477 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
478 struct nct7802_data *data = dev_get_drvdata(dev);
479 unsigned int regval;
480 int err;
481
482 err = regmap_read(data->regmap, sattr->nr, &regval);
483 if (err)
484 return err;
485
486 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
487}
488
489static ssize_t
4aabaf30 490beep_store(struct device *dev, struct device_attribute *attr, const char *buf,
3434f378
GR		 491 size_t count)
492{
493 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
494 struct nct7802_data *data = dev_get_drvdata(dev);
495 unsigned long val;
496 int err;
497
498 err = kstrtoul(buf, 10, &val);
499 if (err < 0)
500 return err;
501 if (val > 1)
502 return -EINVAL;
503
504 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
505 val ? 1 << sattr->index : 0);
506 return err ? : count;
507}
508
4aabaf30
GR		 509static SENSOR_DEVICE_ATTR_RW(temp1_type, temp_type, 0);
510static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0x01, REG_TEMP_LSB);
511static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 0x31, 0);
512static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0x30, 0);
513static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0x3a, 0);
514
515static SENSOR_DEVICE_ATTR_RW(temp2_type, temp_type, 1);
516static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0x02, REG_TEMP_LSB);
517static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 0x33, 0);
518static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 0x32, 0);
519static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 0x3b, 0);
520
521static SENSOR_DEVICE_ATTR_RW(temp3_type, temp_type, 2);
522static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0x03, REG_TEMP_LSB);
523static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 0x35, 0);
524static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 0x34, 0);
525static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 0x3c, 0);
526
527static SENSOR_DEVICE_ATTR_2_RO(temp4_input, temp, 0x04, 0);
528static SENSOR_DEVICE_ATTR_2_RW(temp4_min, temp, 0x37, 0);
529static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 0x36, 0);
530static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 0x3d, 0);
531
532static SENSOR_DEVICE_ATTR_2_RO(temp5_input, temp, 0x06, REG_TEMP_PECI_LSB);
533static SENSOR_DEVICE_ATTR_2_RW(temp5_min, temp, 0x39, 0);
534static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 0x38, 0);
535static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 0x3e, 0);
536
537static SENSOR_DEVICE_ATTR_2_RO(temp6_input, temp, 0x07, REG_TEMP_PECI_LSB);
538
539static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, alarm, 0x18, 0);
540static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, alarm, 0x18, 1);
541static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, alarm, 0x18, 2);
542static SENSOR_DEVICE_ATTR_2_RO(temp4_min_alarm, alarm, 0x18, 3);
543static SENSOR_DEVICE_ATTR_2_RO(temp5_min_alarm, alarm, 0x18, 4);
544
545static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, alarm, 0x19, 0);
546static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, alarm, 0x19, 1);
547static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, alarm, 0x19, 2);
548static SENSOR_DEVICE_ATTR_2_RO(temp4_max_alarm, alarm, 0x19, 3);
549static SENSOR_DEVICE_ATTR_2_RO(temp5_max_alarm, alarm, 0x19, 4);
550
551static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, alarm, 0x1b, 0);
552static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, alarm, 0x1b, 1);
553static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, alarm, 0x1b, 2);
554static SENSOR_DEVICE_ATTR_2_RO(temp4_crit_alarm, alarm, 0x1b, 3);
555static SENSOR_DEVICE_ATTR_2_RO(temp5_crit_alarm, alarm, 0x1b, 4);
556
557static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, alarm, 0x17, 0);
558static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, alarm, 0x17, 1);
559static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, alarm, 0x17, 2);
560
561static SENSOR_DEVICE_ATTR_2_RW(temp1_beep, beep, 0x5c, 0);
562static SENSOR_DEVICE_ATTR_2_RW(temp2_beep, beep, 0x5c, 1);
563static SENSOR_DEVICE_ATTR_2_RW(temp3_beep, beep, 0x5c, 2);
564static SENSOR_DEVICE_ATTR_2_RW(temp4_beep, beep, 0x5c, 3);
565static SENSOR_DEVICE_ATTR_2_RW(temp5_beep, beep, 0x5c, 4);
566static SENSOR_DEVICE_ATTR_2_RW(temp6_beep, beep, 0x5c, 5);
3434f378
GR		 567
568static struct attribute *nct7802_temp_attrs[] = {
fcdc5739 569 &sensor_dev_attr_temp1_type.dev_attr.attr,
3434f378
GR		 570 &sensor_dev_attr_temp1_input.dev_attr.attr,
571 &sensor_dev_attr_temp1_min.dev_attr.attr,
572 &sensor_dev_attr_temp1_max.dev_attr.attr,
573 &sensor_dev_attr_temp1_crit.dev_attr.attr,
574 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
575 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
576 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
577 &sensor_dev_attr_temp1_fault.dev_attr.attr,
578 &sensor_dev_attr_temp1_beep.dev_attr.attr,
579
fcdc5739
CS		 580 &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */
581 &sensor_dev_attr_temp2_input.dev_attr.attr,
3434f378
GR		 582 &sensor_dev_attr_temp2_min.dev_attr.attr,
583 &sensor_dev_attr_temp2_max.dev_attr.attr,
584 &sensor_dev_attr_temp2_crit.dev_attr.attr,
585 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
586 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
587 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
588 &sensor_dev_attr_temp2_fault.dev_attr.attr,
589 &sensor_dev_attr_temp2_beep.dev_attr.attr,
590
fcdc5739
CS		 591 &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */
592 &sensor_dev_attr_temp3_input.dev_attr.attr,
3434f378
GR		 593 &sensor_dev_attr_temp3_min.dev_attr.attr,
594 &sensor_dev_attr_temp3_max.dev_attr.attr,
595 &sensor_dev_attr_temp3_crit.dev_attr.attr,
596 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
597 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
598 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
599 &sensor_dev_attr_temp3_fault.dev_attr.attr,
600 &sensor_dev_attr_temp3_beep.dev_attr.attr,
601
fcdc5739 602 &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */
3434f378
GR		 603 &sensor_dev_attr_temp4_min.dev_attr.attr,
604 &sensor_dev_attr_temp4_max.dev_attr.attr,
605 &sensor_dev_attr_temp4_crit.dev_attr.attr,
606 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
607 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
608 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
609 &sensor_dev_attr_temp4_beep.dev_attr.attr,
610
fcdc5739 611 &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */
3434f378
GR		 612 &sensor_dev_attr_temp5_min.dev_attr.attr,
613 &sensor_dev_attr_temp5_max.dev_attr.attr,
614 &sensor_dev_attr_temp5_crit.dev_attr.attr,
615 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
616 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
617 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
618 &sensor_dev_attr_temp5_beep.dev_attr.attr,
619
fcdc5739 620 &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */
3434f378
GR		 621 &sensor_dev_attr_temp6_beep.dev_attr.attr,
622
623 NULL
624};
625
626static umode_t nct7802_temp_is_visible(struct kobject *kobj,
627 struct attribute *attr, int index)
628{
629 struct device *dev = container_of(kobj, struct device, kobj);
630 struct nct7802_data *data = dev_get_drvdata(dev);
631 unsigned int reg;
632 int err;
633
634 err = regmap_read(data->regmap, REG_MODE, &reg);
635 if (err < 0)
636 return 0;
637
fcdc5739 638 if (index < 10 &&
3434f378
GR		 639 (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */
640 return 0;
fcdc5739
CS		 641
642 if (index >= 10 && index < 20 &&
3434f378
GR		 643 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */
644 return 0;
fcdc5739 645 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */
3434f378 646 return 0;
fcdc5739
CS		 647
648 if (index >= 30 && index < 38) /* local */
3434f378
GR		 649 return attr->mode;
650
651 err = regmap_read(data->regmap, REG_PECI_ENABLE, &reg);
652 if (err < 0)
653 return 0;
654
fcdc5739 655 if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */
3434f378
GR		 656 return 0;
657
fcdc5739 658 if (index >= 0x46 && (!(reg & 0x02))) /* PECI 1 */
3434f378
GR		 659 return 0;
660
661 return attr->mode;
662}
663
afc680f3 664static const struct attribute_group nct7802_temp_group = {
3434f378
GR		 665 .attrs = nct7802_temp_attrs,
666 .is_visible = nct7802_temp_is_visible,
667};
668
4aabaf30
GR		 669static SENSOR_DEVICE_ATTR_2_RO(in0_input, in, 0, 0);
670static SENSOR_DEVICE_ATTR_2_RW(in0_min, in, 0, 1);
671static SENSOR_DEVICE_ATTR_2_RW(in0_max, in, 0, 2);
672static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, alarm, 0x1e, 3);
673static SENSOR_DEVICE_ATTR_2_RW(in0_beep, beep, 0x5a, 3);
674
675static SENSOR_DEVICE_ATTR_2_RO(in1_input, in, 1, 0);
676
677static SENSOR_DEVICE_ATTR_2_RO(in2_input, in, 2, 0);
678static SENSOR_DEVICE_ATTR_2_RW(in2_min, in, 2, 1);
679static SENSOR_DEVICE_ATTR_2_RW(in2_max, in, 2, 2);
680static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, alarm, 0x1e, 0);
681static SENSOR_DEVICE_ATTR_2_RW(in2_beep, beep, 0x5a, 0);
682
683static SENSOR_DEVICE_ATTR_2_RO(in3_input, in, 3, 0);
684static SENSOR_DEVICE_ATTR_2_RW(in3_min, in, 3, 1);
685static SENSOR_DEVICE_ATTR_2_RW(in3_max, in, 3, 2);
686static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, alarm, 0x1e, 1);
687static SENSOR_DEVICE_ATTR_2_RW(in3_beep, beep, 0x5a, 1);
688
689static SENSOR_DEVICE_ATTR_2_RO(in4_input, in, 4, 0);
690static SENSOR_DEVICE_ATTR_2_RW(in4_min, in, 4, 1);
691static SENSOR_DEVICE_ATTR_2_RW(in4_max, in, 4, 2);
692static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, alarm, 0x1e, 2);
693static SENSOR_DEVICE_ATTR_2_RW(in4_beep, beep, 0x5a, 2);
3434f378
GR		 694
695static struct attribute *nct7802_in_attrs[] = {
696 &sensor_dev_attr_in0_input.dev_attr.attr,
697 &sensor_dev_attr_in0_min.dev_attr.attr,
698 &sensor_dev_attr_in0_max.dev_attr.attr,
699 &sensor_dev_attr_in0_alarm.dev_attr.attr,
700 &sensor_dev_attr_in0_beep.dev_attr.attr,
701
702 &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */
703
704 &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */
705 &sensor_dev_attr_in2_min.dev_attr.attr,
706 &sensor_dev_attr_in2_max.dev_attr.attr,
707 &sensor_dev_attr_in2_alarm.dev_attr.attr,
708 &sensor_dev_attr_in2_beep.dev_attr.attr,
709
710 &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */
711 &sensor_dev_attr_in3_min.dev_attr.attr,
712 &sensor_dev_attr_in3_max.dev_attr.attr,
713 &sensor_dev_attr_in3_alarm.dev_attr.attr,
714 &sensor_dev_attr_in3_beep.dev_attr.attr,
715
716 &sensor_dev_attr_in4_input.dev_attr.attr, /* 17 */
717 &sensor_dev_attr_in4_min.dev_attr.attr,
718 &sensor_dev_attr_in4_max.dev_attr.attr,
719 &sensor_dev_attr_in4_alarm.dev_attr.attr,
720 &sensor_dev_attr_in4_beep.dev_attr.attr,
721
722 NULL,
723};
724
725static umode_t nct7802_in_is_visible(struct kobject *kobj,
726 struct attribute *attr, int index)
727{
728 struct device *dev = container_of(kobj, struct device, kobj);
729 struct nct7802_data *data = dev_get_drvdata(dev);
730 unsigned int reg;
731 int err;
732
733 if (index < 6) /* VCC, VCORE */
734 return attr->mode;
735
736 err = regmap_read(data->regmap, REG_MODE, &reg);
737 if (err < 0)
738 return 0;
739
740 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */
741 return 0;
742 if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c) /* VSEN2 */
743 return 0;
744 if (index >= 17 && (reg & 0x30) != 0x30) /* VSEN3 */
745 return 0;
746
747 return attr->mode;
748}
749
afc680f3 750static const struct attribute_group nct7802_in_group = {
3434f378
GR		 751 .attrs = nct7802_in_attrs,
752 .is_visible = nct7802_in_is_visible,
753};
754
4aabaf30
GR		 755static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0x10);
756static SENSOR_DEVICE_ATTR_2_RW(fan1_min, fan_min, 0x49, 0x4c);
757static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, alarm, 0x1a, 0);
758static SENSOR_DEVICE_ATTR_2_RW(fan1_beep, beep, 0x5b, 0);
759static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 0x11);
760static SENSOR_DEVICE_ATTR_2_RW(fan2_min, fan_min, 0x4a, 0x4d);
761static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, alarm, 0x1a, 1);
762static SENSOR_DEVICE_ATTR_2_RW(fan2_beep, beep, 0x5b, 1);
763static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 0x12);
764static SENSOR_DEVICE_ATTR_2_RW(fan3_min, fan_min, 0x4b, 0x4e);
765static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, alarm, 0x1a, 2);
766static SENSOR_DEVICE_ATTR_2_RW(fan3_beep, beep, 0x5b, 2);
3434f378 767
876420e0 768/* 7.2.89 Fan Control Output Type */
4aabaf30
GR		 769static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0);
770static SENSOR_DEVICE_ATTR_RO(pwm2_mode, pwm_mode, 1);
771static SENSOR_DEVICE_ATTR_RO(pwm3_mode, pwm_mode, 2);
876420e0 772
ea33597c 773/* 7.2.91... Fan Control Output Value */
4aabaf30
GR		 774static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, REG_PWM(0));
775static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, REG_PWM(1));
776static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, REG_PWM(2));
ea33597c 777
5102f022 778/* 7.2.95... Temperature to Fan mapping Relationships Register */
4aabaf30
GR		 779static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
780static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
781static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
5102f022 782
3434f378
GR		 783static struct attribute *nct7802_fan_attrs[] = {
784 &sensor_dev_attr_fan1_input.dev_attr.attr,
785 &sensor_dev_attr_fan1_min.dev_attr.attr,
786 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
787 &sensor_dev_attr_fan1_beep.dev_attr.attr,
788 &sensor_dev_attr_fan2_input.dev_attr.attr,
789 &sensor_dev_attr_fan2_min.dev_attr.attr,
790 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
791 &sensor_dev_attr_fan2_beep.dev_attr.attr,
792 &sensor_dev_attr_fan3_input.dev_attr.attr,
793 &sensor_dev_attr_fan3_min.dev_attr.attr,
794 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
795 &sensor_dev_attr_fan3_beep.dev_attr.attr,
796
797 NULL
798};
799
800static umode_t nct7802_fan_is_visible(struct kobject *kobj,
801 struct attribute *attr, int index)
802{
803 struct device *dev = container_of(kobj, struct device, kobj);
804 struct nct7802_data *data = dev_get_drvdata(dev);
805 int fan = index / 4; /* 4 attributes per fan */
806 unsigned int reg;
807 int err;
808
809 err = regmap_read(data->regmap, REG_FAN_ENABLE, &reg);
810 if (err < 0 || !(reg & (1 << fan)))
811 return 0;
812
813 return attr->mode;
814}
815
afc680f3 816static const struct attribute_group nct7802_fan_group = {
3434f378
GR		 817 .attrs = nct7802_fan_attrs,
818 .is_visible = nct7802_fan_is_visible,
819};
820
ea33597c 821static struct attribute *nct7802_pwm_attrs[] = {
5102f022 822 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
876420e0 823 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
ea33597c 824 &sensor_dev_attr_pwm1.dev_attr.attr,
5102f022 825 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
876420e0 826 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
ea33597c 827 &sensor_dev_attr_pwm2.dev_attr.attr,
5102f022 828 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
876420e0 829 &sensor_dev_attr_pwm3_mode.dev_attr.attr,
ea33597c
CS		 830 &sensor_dev_attr_pwm3.dev_attr.attr,
831 NULL
832};
833
afc680f3 834static const struct attribute_group nct7802_pwm_group = {
ea33597c
CS		 835 .attrs = nct7802_pwm_attrs,
836};
837
1c6e8f6b 838/* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */
4aabaf30
GR		 839static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_temp, temp, 0x80, 0);
840static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_temp, temp, 0x81, 0);
841static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point3_temp, temp, 0x82, 0);
842static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point4_temp, temp, 0x83, 0);
843static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point5_temp, temp, 0x84, 0);
1c6e8f6b
CS		 844
845/* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */
4aabaf30
GR		 846static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm, 0x85);
847static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm, 0x86);
848static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point3_pwm, pwm, 0x87);
849static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point4_pwm, pwm, 0x88);
850static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point5_pwm, pwm, 0);
1c6e8f6b
CS		 851
852/* 7.2.124 Table 2 X-axis Transition Point 1 Register */
4aabaf30
GR		 853static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_temp, temp, 0x90, 0);
854static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_temp, temp, 0x91, 0);
855static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point3_temp, temp, 0x92, 0);
856static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point4_temp, temp, 0x93, 0);
857static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point5_temp, temp, 0x94, 0);
1c6e8f6b
CS		 858
859/* 7.2.129 Table 2 Y-axis Transition Point 1 Register */
4aabaf30
GR		 860static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm, 0x95);
861static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm, 0x96);
862static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point3_pwm, pwm, 0x97);
863static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point4_pwm, pwm, 0x98);
864static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point5_pwm, pwm, 0);
1c6e8f6b
CS		 865
866/* 7.2.133 Table 3 X-axis Transition Point 1 Register */
4aabaf30
GR		 867static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_temp, temp, 0xA0, 0);
868static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_temp, temp, 0xA1, 0);
869static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point3_temp, temp, 0xA2, 0);
870static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point4_temp, temp, 0xA3, 0);
871static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point5_temp, temp, 0xA4, 0);
1c6e8f6b
CS		 872
873/* 7.2.138 Table 3 Y-axis Transition Point 1 Register */
4aabaf30
GR		 874static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm, 0xA5);
875static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm, 0xA6);
876static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point3_pwm, pwm, 0xA7);
877static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point4_pwm, pwm, 0xA8);
878static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point5_pwm, pwm, 0);
1c6e8f6b
CS		 879
880static struct attribute *nct7802_auto_point_attrs[] = {
881 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
882 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
883 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
884 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
885 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
886
887 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
888 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
889 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
890 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
891 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
892
893 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
894 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
895 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
896 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
897 &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
898
899 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
900 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
901 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
902 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
903 &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
904
905 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
906 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
907 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
908 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
909 &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr,
910
911 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
912 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
913 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
914 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
915 &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr,
916
917 NULL
918};
919
afc680f3 920static const struct attribute_group nct7802_auto_point_group = {
1c6e8f6b
CS		 921 .attrs = nct7802_auto_point_attrs,
922};
923
3434f378
GR		 924static const struct attribute_group *nct7802_groups[] = {
925 &nct7802_temp_group,
926 &nct7802_in_group,
927 &nct7802_fan_group,
ea33597c 928 &nct7802_pwm_group,
1c6e8f6b 929 &nct7802_auto_point_group,
3434f378
GR		 930 NULL
931};
932
933static int nct7802_detect(struct i2c_client *client,
934 struct i2c_board_info *info)
935{
936 int reg;
937
938 /*
939 * Chip identification registers are only available in bank 0,
940 * so only attempt chip detection if bank 0 is selected
941 */
942 reg = i2c_smbus_read_byte_data(client, REG_BANK);
943 if (reg != 0x00)
944 return -ENODEV;
945
946 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
947 if (reg != 0x50)
948 return -ENODEV;
949
950 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
951 if (reg != 0xc3)
952 return -ENODEV;
953
954 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
955 if (reg < 0 || (reg & 0xf0) != 0x20)
956 return -ENODEV;
957
958 /* Also validate lower bits of voltage and temperature registers */
959 reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB);
960 if (reg < 0 || (reg & 0x1f))
961 return -ENODEV;
962
963 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
964 if (reg < 0 || (reg & 0x3f))
965 return -ENODEV;
966
967 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
968 if (reg < 0 || (reg & 0x3f))
969 return -ENODEV;
970
971 strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
972 return 0;
973}
974
975static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
976{
1c6e8f6b
CS		 977 return (reg != REG_BANK && reg <= 0x20) ||
978 (reg >= REG_PWM(0) && reg <= REG_PWM(2));
3434f378
GR		 979}
980
3c535bca 981static const struct regmap_config nct7802_regmap_config = {
3434f378
GR		 982 .reg_bits = 8,
983 .val_bits = 8,
984 .cache_type = REGCACHE_RBTREE,
985 .volatile_reg = nct7802_regmap_is_volatile,
986};
987
988static int nct7802_init_chip(struct nct7802_data *data)
989{
990 int err;
991
992 /* Enable ADC */
993 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
994 if (err)
995 return err;
996
997 /* Enable local temperature sensor */
998 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
999 if (err)
1000 return err;
1001
1002 /* Enable Vcore and VCC voltage monitoring */
1003 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
1004}
1005
1006static int nct7802_probe(struct i2c_client *client,
1007 const struct i2c_device_id *id)
1008{
1009 struct device *dev = &client->dev;
1010 struct nct7802_data *data;
1011 struct device *hwmon_dev;
1012 int ret;
1013
1014 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1015 if (data == NULL)
1016 return -ENOMEM;
1017
1018 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
1019 if (IS_ERR(data->regmap))
1020 return PTR_ERR(data->regmap);
1021
1022 mutex_init(&data->access_lock);
1023
1024 ret = nct7802_init_chip(data);
1025 if (ret < 0)
1026 return ret;
1027
1028 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1029 data,
1030 nct7802_groups);
1031 return PTR_ERR_OR_ZERO(hwmon_dev);
1032}
1033
1034static const unsigned short nct7802_address_list[] = {
1035 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1036};
1037
1038static const struct i2c_device_id nct7802_idtable[] = {
1039 { "nct7802", 0 },
1040 { }
1041};
1042MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1043
1044static struct i2c_driver nct7802_driver = {
1045 .class = I2C_CLASS_HWMON,
1046 .driver = {
1047 .name = DRVNAME,
1048 },
1049 .detect = nct7802_detect,
1050 .probe = nct7802_probe,
1051 .id_table = nct7802_idtable,
1052 .address_list = nct7802_address_list,
1053};
1054
1055module_i2c_driver(nct7802_driver);
1056
1057MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1058MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1059MODULE_LICENSE("GPL v2");
Linux 6.x block layer and io_uring tree(s)