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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
52#define REG_MODE 0x22
53#define REG_PECI_ENABLE 0x23
54#define REG_FAN_ENABLE 0x24
55#define REG_VMON_ENABLE 0x25
56#define REG_PWM(x) (0x60 + (x))
57#define REG_SMARTFAN_EN(x) (0x64 + (x) / 2)
58#define SMARTFAN_EN_SHIFT(x) ((x) % 2 * 4)
59#define REG_VENDOR_ID 0xfd
60#define REG_CHIP_ID 0xfe
61#define REG_VERSION_ID 0xff
62
63
64
65
66
67struct nct7802_data {
68 struct regmap *regmap;
69 struct mutex access_lock;
70};
71
72static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
73 char *buf)
74{
75 struct nct7802_data *data = dev_get_drvdata(dev);
76 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
77 unsigned int mode;
78 int ret;
79
80 ret = regmap_read(data->regmap, REG_MODE, &mode);
81 if (ret < 0)
82 return ret;
83
84 return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2);
85}
86
87static ssize_t store_temp_type(struct device *dev,
88 struct device_attribute *attr,
89 const char *buf, size_t count)
90{
91 struct nct7802_data *data = dev_get_drvdata(dev);
92 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
93 unsigned int type;
94 int err;
95
96 err = kstrtouint(buf, 0, &type);
97 if (err < 0)
98 return err;
99 if (sattr->index == 2 && type != 4)
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
108static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
109 char *buf)
110{
111 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
112 struct nct7802_data *data = dev_get_drvdata(dev);
113 unsigned int regval;
114 int ret;
115
116 if (sattr->index > 1)
117 return sprintf(buf, "1\n");
118
119 ret = regmap_read(data->regmap, 0x5E, ®val);
120 if (ret < 0)
121 return ret;
122
123 return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
124}
125
126static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
127 char *buf)
128{
129 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
130 struct nct7802_data *data = dev_get_drvdata(dev);
131 unsigned int val;
132 int ret;
133
134 if (!attr->index)
135 return sprintf(buf, "255\n");
136
137 ret = regmap_read(data->regmap, attr->index, &val);
138 if (ret < 0)
139 return ret;
140
141 return sprintf(buf, "%d\n", val);
142}
143
144static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr,
145 const char *buf, size_t count)
146{
147 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
148 struct nct7802_data *data = dev_get_drvdata(dev);
149 int err;
150 u8 val;
151
152 err = kstrtou8(buf, 0, &val);
153 if (err < 0)
154 return err;
155
156 err = regmap_write(data->regmap, attr->index, val);
157 return err ? : count;
158}
159
160static ssize_t show_pwm_enable(struct device *dev,
161 struct device_attribute *attr, char *buf)
162{
163 struct nct7802_data *data = dev_get_drvdata(dev);
164 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
165 unsigned int reg, enabled;
166 int ret;
167
168 ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), ®);
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
175static ssize_t store_pwm_enable(struct device *dev,
176 struct device_attribute *attr,
177 const char *buf, size_t count)
178{
179 struct nct7802_data *data = dev_get_drvdata(dev);
180 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
181 u8 val;
182 int ret;
183
184 ret = kstrtou8(buf, 0, &val);
185 if (ret < 0)
186 return ret;
187 if (val < 1 || val > 2)
188 return -EINVAL;
189 ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index),
190 1 << SMARTFAN_EN_SHIFT(sattr->index),
191 (val - 1) << SMARTFAN_EN_SHIFT(sattr->index));
192 return ret ? : count;
193}
194
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) {
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
234 if (ret == 0x1fff)
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
258 if (ret == 0x1fff)
259 ret = 0;
260 else if (ret)
261 ret = DIV_ROUND_CLOSEST(1350000U, ret);
262 else
263 ret = 1350000U;
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,
270 u8 reg_fan_high, unsigned long limit)
271{
272 int err;
273
274 if (limit)
275 limit = DIV_ROUND_CLOSEST(1350000U, limit);
276 else
277 limit = 0x1fff;
278 limit = clamp_val(limit, 0, 0x1fff);
279
280 mutex_lock(&data->access_lock);
281 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
282 if (err < 0)
283 goto abort;
284
285 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
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) {
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 {
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,
326 unsigned long voltage)
327{
328 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
329 int err;
330
331 voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]);
332 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
333
334 mutex_lock(&data->access_lock);
335 err = regmap_write(data->regmap,
336 REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
337 voltage & 0xff);
338 if (err < 0)
339 goto abort;
340
341 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
342 0x0300 >> shift, (voltage & 0x0300) >> shift);
343abort:
344 mutex_unlock(&data->access_lock);
345 return err;
346}
347
348static ssize_t show_in(struct device *dev, struct device_attribute *attr,
349 char *buf)
350{
351 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
352 struct nct7802_data *data = dev_get_drvdata(dev);
353 int voltage;
354
355 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
356 if (voltage < 0)
357 return voltage;
358
359 return sprintf(buf, "%d\n", voltage);
360}
361
362static ssize_t store_in(struct device *dev, struct device_attribute *attr,
363 const char *buf, size_t count)
364{
365 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
366 struct nct7802_data *data = dev_get_drvdata(dev);
367 int index = sattr->index;
368 int nr = sattr->nr;
369 unsigned long val;
370 int err;
371
372 err = kstrtoul(buf, 10, &val);
373 if (err < 0)
374 return err;
375
376 err = nct7802_write_voltage(data, nr, index, val);
377 return err ? : count;
378}
379
380static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
381 char *buf)
382{
383 struct nct7802_data *data = dev_get_drvdata(dev);
384 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
385 int err, temp;
386
387 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
388 if (err < 0)
389 return err;
390
391 return sprintf(buf, "%d\n", temp);
392}
393
394static ssize_t store_temp(struct device *dev, struct device_attribute *attr,
395 const char *buf, size_t count)
396{
397 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
398 struct nct7802_data *data = dev_get_drvdata(dev);
399 int nr = sattr->nr;
400 long val;
401 int err;
402
403 err = kstrtol(buf, 10, &val);
404 if (err < 0)
405 return err;
406
407 val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000);
408
409 err = regmap_write(data->regmap, nr, val & 0xff);
410 return err ? : count;
411}
412
413static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
414 char *buf)
415{
416 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
417 struct nct7802_data *data = dev_get_drvdata(dev);
418 int speed;
419
420 speed = nct7802_read_fan(data, sattr->index);
421 if (speed < 0)
422 return speed;
423
424 return sprintf(buf, "%d\n", speed);
425}
426
427static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
428 char *buf)
429{
430 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
431 struct nct7802_data *data = dev_get_drvdata(dev);
432 int speed;
433
434 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
435 if (speed < 0)
436 return speed;
437
438 return sprintf(buf, "%d\n", speed);
439}
440
441static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr,
442 const char *buf, size_t count)
443{
444 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
445 struct nct7802_data *data = dev_get_drvdata(dev);
446 unsigned long val;
447 int err;
448
449 err = kstrtoul(buf, 10, &val);
450 if (err < 0)
451 return err;
452
453 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
454 return err ? : count;
455}
456
457static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
458 char *buf)
459{
460 struct nct7802_data *data = dev_get_drvdata(dev);
461 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
462 int bit = sattr->index;
463 unsigned int val;
464 int ret;
465
466 ret = regmap_read(data->regmap, sattr->nr, &val);
467 if (ret < 0)
468 return ret;
469
470 return sprintf(buf, "%u\n", !!(val & (1 << bit)));
471}
472
473static ssize_t
474show_beep(struct device *dev, struct device_attribute *attr, char *buf)
475{
476 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
477 struct nct7802_data *data = dev_get_drvdata(dev);
478 unsigned int regval;
479 int err;
480
481 err = regmap_read(data->regmap, sattr->nr, ®val);
482 if (err)
483 return err;
484
485 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
486}
487
488static ssize_t
489store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
490 size_t count)
491{
492 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
493 struct nct7802_data *data = dev_get_drvdata(dev);
494 unsigned long val;
495 int err;
496
497 err = kstrtoul(buf, 10, &val);
498 if (err < 0)
499 return err;
500 if (val > 1)
501 return -EINVAL;
502
503 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
504 val ? 1 << sattr->index : 0);
505 return err ? : count;
506}
507
508static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
509 show_temp_type, store_temp_type, 0);
510static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01,
511 REG_TEMP_LSB);
512static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp,
513 store_temp, 0x31, 0);
514static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp,
515 store_temp, 0x30, 0);
516static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp,
517 store_temp, 0x3a, 0);
518
519static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
520 show_temp_type, store_temp_type, 1);
521static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02,
522 REG_TEMP_LSB);
523static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp,
524 store_temp, 0x33, 0);
525static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp,
526 store_temp, 0x32, 0);
527static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp,
528 store_temp, 0x3b, 0);
529
530static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
531 show_temp_type, store_temp_type, 2);
532static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03,
533 REG_TEMP_LSB);
534static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp,
535 store_temp, 0x35, 0);
536static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp,
537 store_temp, 0x34, 0);
538static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp,
539 store_temp, 0x3c, 0);
540
541static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0);
542static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp,
543 store_temp, 0x37, 0);
544static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp,
545 store_temp, 0x36, 0);
546static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp,
547 store_temp, 0x3d, 0);
548
549static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06,
550 REG_TEMP_PECI_LSB);
551static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp,
552 store_temp, 0x39, 0);
553static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp,
554 store_temp, 0x38, 0);
555static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp,
556 store_temp, 0x3e, 0);
557
558static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07,
559 REG_TEMP_PECI_LSB);
560
561static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
562 0x18, 0);
563static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL,
564 0x18, 1);
565static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL,
566 0x18, 2);
567static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL,
568 0x18, 3);
569static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL,
570 0x18, 4);
571
572static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
573 0x19, 0);
574static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL,
575 0x19, 1);
576static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL,
577 0x19, 2);
578static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL,
579 0x19, 3);
580static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL,
581 0x19, 4);
582
583static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
584 0x1b, 0);
585static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL,
586 0x1b, 1);
587static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL,
588 0x1b, 2);
589static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL,
590 0x1b, 3);
591static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL,
592 0x1b, 4);
593
594static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0);
595static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1);
596static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2);
597
598static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep,
599 store_beep, 0x5c, 0);
600static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep,
601 store_beep, 0x5c, 1);
602static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep,
603 store_beep, 0x5c, 2);
604static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep,
605 store_beep, 0x5c, 3);
606static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep,
607 store_beep, 0x5c, 4);
608static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep,
609 store_beep, 0x5c, 5);
610
611static struct attribute *nct7802_temp_attrs[] = {
612 &sensor_dev_attr_temp1_type.dev_attr.attr,
613 &sensor_dev_attr_temp1_input.dev_attr.attr,
614 &sensor_dev_attr_temp1_min.dev_attr.attr,
615 &sensor_dev_attr_temp1_max.dev_attr.attr,
616 &sensor_dev_attr_temp1_crit.dev_attr.attr,
617 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
618 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
619 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
620 &sensor_dev_attr_temp1_fault.dev_attr.attr,
621 &sensor_dev_attr_temp1_beep.dev_attr.attr,
622
623 &sensor_dev_attr_temp2_type.dev_attr.attr,
624 &sensor_dev_attr_temp2_input.dev_attr.attr,
625 &sensor_dev_attr_temp2_min.dev_attr.attr,
626 &sensor_dev_attr_temp2_max.dev_attr.attr,
627 &sensor_dev_attr_temp2_crit.dev_attr.attr,
628 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
629 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
630 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
631 &sensor_dev_attr_temp2_fault.dev_attr.attr,
632 &sensor_dev_attr_temp2_beep.dev_attr.attr,
633
634 &sensor_dev_attr_temp3_type.dev_attr.attr,
635 &sensor_dev_attr_temp3_input.dev_attr.attr,
636 &sensor_dev_attr_temp3_min.dev_attr.attr,
637 &sensor_dev_attr_temp3_max.dev_attr.attr,
638 &sensor_dev_attr_temp3_crit.dev_attr.attr,
639 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
640 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
641 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
642 &sensor_dev_attr_temp3_fault.dev_attr.attr,
643 &sensor_dev_attr_temp3_beep.dev_attr.attr,
644
645 &sensor_dev_attr_temp4_input.dev_attr.attr,
646 &sensor_dev_attr_temp4_min.dev_attr.attr,
647 &sensor_dev_attr_temp4_max.dev_attr.attr,
648 &sensor_dev_attr_temp4_crit.dev_attr.attr,
649 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
650 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
651 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
652 &sensor_dev_attr_temp4_beep.dev_attr.attr,
653
654 &sensor_dev_attr_temp5_input.dev_attr.attr,
655 &sensor_dev_attr_temp5_min.dev_attr.attr,
656 &sensor_dev_attr_temp5_max.dev_attr.attr,
657 &sensor_dev_attr_temp5_crit.dev_attr.attr,
658 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
659 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
660 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
661 &sensor_dev_attr_temp5_beep.dev_attr.attr,
662
663 &sensor_dev_attr_temp6_input.dev_attr.attr,
664 &sensor_dev_attr_temp6_beep.dev_attr.attr,
665
666 NULL
667};
668
669static umode_t nct7802_temp_is_visible(struct kobject *kobj,
670 struct attribute *attr, int index)
671{
672 struct device *dev = container_of(kobj, struct device, kobj);
673 struct nct7802_data *data = dev_get_drvdata(dev);
674 unsigned int reg;
675 int err;
676
677 err = regmap_read(data->regmap, REG_MODE, ®);
678 if (err < 0)
679 return 0;
680
681 if (index < 10 &&
682 (reg & 03) != 0x01 && (reg & 0x03) != 0x02)
683 return 0;
684
685 if (index >= 10 && index < 20 &&
686 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08)
687 return 0;
688 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20)
689 return 0;
690
691 if (index >= 30 && index < 38)
692 return attr->mode;
693
694 err = regmap_read(data->regmap, REG_PECI_ENABLE, ®);
695 if (err < 0)
696 return 0;
697
698 if (index >= 38 && index < 46 && !(reg & 0x01))
699 return 0;
700
701 if (index >= 0x46 && (!(reg & 0x02)))
702 return 0;
703
704 return attr->mode;
705}
706
707static const struct attribute_group nct7802_temp_group = {
708 .attrs = nct7802_temp_attrs,
709 .is_visible = nct7802_temp_is_visible,
710};
711
712static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
713static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in,
714 0, 1);
715static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in,
716 0, 2);
717static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3);
718static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
719 0x5a, 3);
720
721static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
722
723static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
724static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in,
725 2, 1);
726static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in,
727 2, 2);
728static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0);
729static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
730 0x5a, 0);
731
732static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
733static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in,
734 3, 1);
735static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in,
736 3, 2);
737static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1);
738static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
739 0x5a, 1);
740
741static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
742static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in,
743 4, 1);
744static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in,
745 4, 2);
746static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2);
747static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
748 0x5a, 2);
749
750static struct attribute *nct7802_in_attrs[] = {
751 &sensor_dev_attr_in0_input.dev_attr.attr,
752 &sensor_dev_attr_in0_min.dev_attr.attr,
753 &sensor_dev_attr_in0_max.dev_attr.attr,
754 &sensor_dev_attr_in0_alarm.dev_attr.attr,
755 &sensor_dev_attr_in0_beep.dev_attr.attr,
756
757 &sensor_dev_attr_in1_input.dev_attr.attr,
758
759 &sensor_dev_attr_in2_input.dev_attr.attr,
760 &sensor_dev_attr_in2_min.dev_attr.attr,
761 &sensor_dev_attr_in2_max.dev_attr.attr,
762 &sensor_dev_attr_in2_alarm.dev_attr.attr,
763 &sensor_dev_attr_in2_beep.dev_attr.attr,
764
765 &sensor_dev_attr_in3_input.dev_attr.attr,
766 &sensor_dev_attr_in3_min.dev_attr.attr,
767 &sensor_dev_attr_in3_max.dev_attr.attr,
768 &sensor_dev_attr_in3_alarm.dev_attr.attr,
769 &sensor_dev_attr_in3_beep.dev_attr.attr,
770
771 &sensor_dev_attr_in4_input.dev_attr.attr,
772 &sensor_dev_attr_in4_min.dev_attr.attr,
773 &sensor_dev_attr_in4_max.dev_attr.attr,
774 &sensor_dev_attr_in4_alarm.dev_attr.attr,
775 &sensor_dev_attr_in4_beep.dev_attr.attr,
776
777 NULL,
778};
779
780static umode_t nct7802_in_is_visible(struct kobject *kobj,
781 struct attribute *attr, int index)
782{
783 struct device *dev = container_of(kobj, struct device, kobj);
784 struct nct7802_data *data = dev_get_drvdata(dev);
785 unsigned int reg;
786 int err;
787
788 if (index < 6)
789 return attr->mode;
790
791 err = regmap_read(data->regmap, REG_MODE, ®);
792 if (err < 0)
793 return 0;
794
795 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03)
796 return 0;
797 if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c)
798 return 0;
799 if (index >= 17 && (reg & 0x30) != 0x30)
800 return 0;
801
802 return attr->mode;
803}
804
805static const struct attribute_group nct7802_in_group = {
806 .attrs = nct7802_in_attrs,
807 .is_visible = nct7802_in_is_visible,
808};
809
810static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10);
811static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min,
812 store_fan_min, 0x49, 0x4c);
813static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0);
814static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
815 0x5b, 0);
816static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11);
817static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min,
818 store_fan_min, 0x4a, 0x4d);
819static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1);
820static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
821 0x5b, 1);
822static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12);
823static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min,
824 store_fan_min, 0x4b, 0x4e);
825static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2);
826static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
827 0x5b, 2);
828
829
830static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
831static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
832static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
833
834
835static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
836 REG_PWM(0));
837static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
838 REG_PWM(1));
839static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
840 REG_PWM(2));
841
842
843static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
844 store_pwm_enable, 0);
845static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
846 store_pwm_enable, 1);
847static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
848 store_pwm_enable, 2);
849
850static struct attribute *nct7802_fan_attrs[] = {
851 &sensor_dev_attr_fan1_input.dev_attr.attr,
852 &sensor_dev_attr_fan1_min.dev_attr.attr,
853 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
854 &sensor_dev_attr_fan1_beep.dev_attr.attr,
855 &sensor_dev_attr_fan2_input.dev_attr.attr,
856 &sensor_dev_attr_fan2_min.dev_attr.attr,
857 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
858 &sensor_dev_attr_fan2_beep.dev_attr.attr,
859 &sensor_dev_attr_fan3_input.dev_attr.attr,
860 &sensor_dev_attr_fan3_min.dev_attr.attr,
861 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
862 &sensor_dev_attr_fan3_beep.dev_attr.attr,
863
864 NULL
865};
866
867static umode_t nct7802_fan_is_visible(struct kobject *kobj,
868 struct attribute *attr, int index)
869{
870 struct device *dev = container_of(kobj, struct device, kobj);
871 struct nct7802_data *data = dev_get_drvdata(dev);
872 int fan = index / 4;
873 unsigned int reg;
874 int err;
875
876 err = regmap_read(data->regmap, REG_FAN_ENABLE, ®);
877 if (err < 0 || !(reg & (1 << fan)))
878 return 0;
879
880 return attr->mode;
881}
882
883static const struct attribute_group nct7802_fan_group = {
884 .attrs = nct7802_fan_attrs,
885 .is_visible = nct7802_fan_is_visible,
886};
887
888static struct attribute *nct7802_pwm_attrs[] = {
889 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
890 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
891 &sensor_dev_attr_pwm1.dev_attr.attr,
892 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
893 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
894 &sensor_dev_attr_pwm2.dev_attr.attr,
895 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
896 &sensor_dev_attr_pwm3_mode.dev_attr.attr,
897 &sensor_dev_attr_pwm3.dev_attr.attr,
898 NULL
899};
900
901static const struct attribute_group nct7802_pwm_group = {
902 .attrs = nct7802_pwm_attrs,
903};
904
905
906static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
907 show_temp, store_temp, 0x80, 0);
908static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
909 show_temp, store_temp, 0x81, 0);
910static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
911 show_temp, store_temp, 0x82, 0);
912static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
913 show_temp, store_temp, 0x83, 0);
914static SENSOR_DEVICE_ATTR_2(pwm1_auto_point5_temp, S_IRUGO | S_IWUSR,
915 show_temp, store_temp, 0x84, 0);
916
917
918static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
919 show_pwm, store_pwm, 0x85);
920static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
921 show_pwm, store_pwm, 0x86);
922static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
923 show_pwm, store_pwm, 0x87);
924static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IRUGO | S_IWUSR,
925 show_pwm, store_pwm, 0x88);
926static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
927
928
929static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
930 show_temp, store_temp, 0x90, 0);
931static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
932 show_temp, store_temp, 0x91, 0);
933static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
934 show_temp, store_temp, 0x92, 0);
935static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
936 show_temp, store_temp, 0x93, 0);
937static SENSOR_DEVICE_ATTR_2(pwm2_auto_point5_temp, S_IRUGO | S_IWUSR,
938 show_temp, store_temp, 0x94, 0);
939
940
941static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
942 show_pwm, store_pwm, 0x95);
943static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
944 show_pwm, store_pwm, 0x96);
945static SENSOR_DEVICE_ATTR(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
946 show_pwm, store_pwm, 0x97);
947static SENSOR_DEVICE_ATTR(pwm2_auto_point4_pwm, S_IRUGO | S_IWUSR,
948 show_pwm, store_pwm, 0x98);
949static SENSOR_DEVICE_ATTR(pwm2_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
950
951
952static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
953 show_temp, store_temp, 0xA0, 0);
954static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
955 show_temp, store_temp, 0xA1, 0);
956static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
957 show_temp, store_temp, 0xA2, 0);
958static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
959 show_temp, store_temp, 0xA3, 0);
960static SENSOR_DEVICE_ATTR_2(pwm3_auto_point5_temp, S_IRUGO | S_IWUSR,
961 show_temp, store_temp, 0xA4, 0);
962
963
964static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
965 show_pwm, store_pwm, 0xA5);
966static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
967 show_pwm, store_pwm, 0xA6);
968static SENSOR_DEVICE_ATTR(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
969 show_pwm, store_pwm, 0xA7);
970static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR,
971 show_pwm, store_pwm, 0xA8);
972static SENSOR_DEVICE_ATTR(pwm3_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
973
974static struct attribute *nct7802_auto_point_attrs[] = {
975 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
976 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
977 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
978 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
979 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
980
981 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
982 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
983 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
984 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
985 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
986
987 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
988 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
989 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
990 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
991 &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
992
993 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
994 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
995 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
996 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
997 &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
998
999 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1000 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1001 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1002 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1003 &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr,
1004
1005 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1006 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1007 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1008 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1009 &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr,
1010
1011 NULL
1012};
1013
1014static const struct attribute_group nct7802_auto_point_group = {
1015 .attrs = nct7802_auto_point_attrs,
1016};
1017
1018static const struct attribute_group *nct7802_groups[] = {
1019 &nct7802_temp_group,
1020 &nct7802_in_group,
1021 &nct7802_fan_group,
1022 &nct7802_pwm_group,
1023 &nct7802_auto_point_group,
1024 NULL
1025};
1026
1027static int nct7802_detect(struct i2c_client *client,
1028 struct i2c_board_info *info)
1029{
1030 int reg;
1031
1032
1033
1034
1035
1036 reg = i2c_smbus_read_byte_data(client, REG_BANK);
1037 if (reg != 0x00)
1038 return -ENODEV;
1039
1040 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
1041 if (reg != 0x50)
1042 return -ENODEV;
1043
1044 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
1045 if (reg != 0xc3)
1046 return -ENODEV;
1047
1048 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
1049 if (reg < 0 || (reg & 0xf0) != 0x20)
1050 return -ENODEV;
1051
1052
1053 reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB);
1054 if (reg < 0 || (reg & 0x1f))
1055 return -ENODEV;
1056
1057 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
1058 if (reg < 0 || (reg & 0x3f))
1059 return -ENODEV;
1060
1061 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
1062 if (reg < 0 || (reg & 0x3f))
1063 return -ENODEV;
1064
1065 strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
1066 return 0;
1067}
1068
1069static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
1070{
1071 return (reg != REG_BANK && reg <= 0x20) ||
1072 (reg >= REG_PWM(0) && reg <= REG_PWM(2));
1073}
1074
1075static const struct regmap_config nct7802_regmap_config = {
1076 .reg_bits = 8,
1077 .val_bits = 8,
1078 .cache_type = REGCACHE_RBTREE,
1079 .volatile_reg = nct7802_regmap_is_volatile,
1080};
1081
1082static int nct7802_init_chip(struct nct7802_data *data)
1083{
1084 int err;
1085
1086
1087 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
1088 if (err)
1089 return err;
1090
1091
1092 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
1093 if (err)
1094 return err;
1095
1096
1097 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
1098}
1099
1100static int nct7802_probe(struct i2c_client *client,
1101 const struct i2c_device_id *id)
1102{
1103 struct device *dev = &client->dev;
1104 struct nct7802_data *data;
1105 struct device *hwmon_dev;
1106 int ret;
1107
1108 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1109 if (data == NULL)
1110 return -ENOMEM;
1111
1112 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
1113 if (IS_ERR(data->regmap))
1114 return PTR_ERR(data->regmap);
1115
1116 mutex_init(&data->access_lock);
1117
1118 ret = nct7802_init_chip(data);
1119 if (ret < 0)
1120 return ret;
1121
1122 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1123 data,
1124 nct7802_groups);
1125 return PTR_ERR_OR_ZERO(hwmon_dev);
1126}
1127
1128static const unsigned short nct7802_address_list[] = {
1129 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1130};
1131
1132static const struct i2c_device_id nct7802_idtable[] = {
1133 { "nct7802", 0 },
1134 { }
1135};
1136MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1137
1138static struct i2c_driver nct7802_driver = {
1139 .class = I2C_CLASS_HWMON,
1140 .driver = {
1141 .name = DRVNAME,
1142 },
1143 .detect = nct7802_detect,
1144 .probe = nct7802_probe,
1145 .id_table = nct7802_idtable,
1146 .address_list = nct7802_address_list,
1147};
1148
1149module_i2c_driver(nct7802_driver);
1150
1151MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1152MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1153MODULE_LICENSE("GPL v2");
1154
