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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);
262abort:
263 mutex_unlock(&data->access_lock);
264 return ret;
265}
266
267static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low,
268 u8 reg_fan_high, unsigned int limit)
269{
270 int err;
271
272 if (limit)
273 limit = DIV_ROUND_CLOSEST(1350000U, limit);
274 else
275 limit = 0x1fff;
276 limit = clamp_val(limit, 0, 0x1fff);
277
278 mutex_lock(&data->access_lock);
279 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
280 if (err < 0)
281 goto abort;
282
283 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
284abort:
285 mutex_unlock(&data->access_lock);
286 return err;
287}
288
289static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 };
290
291static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index)
292{
293 unsigned int v1, v2;
294 int ret;
295
296 mutex_lock(&data->access_lock);
297 if (index == 0) {
298 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1);
299 if (ret < 0)
300 goto abort;
301 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2);
302 if (ret < 0)
303 goto abort;
304 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr];
305 } else {
306 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
307
308 ret = regmap_read(data->regmap,
309 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1);
310 if (ret < 0)
311 goto abort;
312 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
313 &v2);
314 if (ret < 0)
315 goto abort;
316 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr];
317 }
318abort:
319 mutex_unlock(&data->access_lock);
320 return ret;
321}
322
323static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
324 unsigned long voltage)
325{
326 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
327 int err;
328
329 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
330 voltage = clamp_val(voltage, 0, 0x3ff);
331
332 mutex_lock(&data->access_lock);
333 err = regmap_write(data->regmap,
334 REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
335 voltage & 0xff);
336 if (err < 0)
337 goto abort;
338
339 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
340 0x0300 >> shift, (voltage & 0x0300) >> shift);
341abort:
342 mutex_unlock(&data->access_lock);
343 return err;
344}
345
346static ssize_t show_in(struct device *dev, struct device_attribute *attr,
347 char *buf)
348{
349 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
350 struct nct7802_data *data = dev_get_drvdata(dev);
351 int voltage;
352
353 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
354 if (voltage < 0)
355 return voltage;
356
357 return sprintf(buf, "%d\n", voltage);
358}
359
360static ssize_t store_in(struct device *dev, struct device_attribute *attr,
361 const char *buf, size_t count)
362{
363 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
364 struct nct7802_data *data = dev_get_drvdata(dev);
365 int index = sattr->index;
366 int nr = sattr->nr;
367 unsigned long val;
368 int err;
369
370 err = kstrtoul(buf, 10, &val);
371 if (err < 0)
372 return err;
373
374 err = nct7802_write_voltage(data, nr, index, val);
375 return err ? : count;
376}
377
378static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
379 char *buf)
380{
381 struct nct7802_data *data = dev_get_drvdata(dev);
382 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
383 int err, temp;
384
385 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
386 if (err < 0)
387 return err;
388
389 return sprintf(buf, "%d\n", temp);
390}
391
392static ssize_t store_temp(struct device *dev, struct device_attribute *attr,
393 const char *buf, size_t count)
394{
395 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
396 struct nct7802_data *data = dev_get_drvdata(dev);
397 int nr = sattr->nr;
398 long val;
399 int err;
400
401 err = kstrtol(buf, 10, &val);
402 if (err < 0)
403 return err;
404
405 val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127);
406
407 err = regmap_write(data->regmap, nr, val & 0xff);
408 return err ? : count;
409}
410
411static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
412 char *buf)
413{
414 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
415 struct nct7802_data *data = dev_get_drvdata(dev);
416 int speed;
417
418 speed = nct7802_read_fan(data, sattr->index);
419 if (speed < 0)
420 return speed;
421
422 return sprintf(buf, "%d\n", speed);
423}
424
425static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
426 char *buf)
427{
428 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
429 struct nct7802_data *data = dev_get_drvdata(dev);
430 int speed;
431
432 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
433 if (speed < 0)
434 return speed;
435
436 return sprintf(buf, "%d\n", speed);
437}
438
439static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr,
440 const char *buf, size_t count)
441{
442 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
443 struct nct7802_data *data = dev_get_drvdata(dev);
444 unsigned long val;
445 int err;
446
447 err = kstrtoul(buf, 10, &val);
448 if (err < 0)
449 return err;
450
451 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
452 return err ? : count;
453}
454
455static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 struct nct7802_data *data = dev_get_drvdata(dev);
459 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
460 int bit = sattr->index;
461 unsigned int val;
462 int ret;
463
464 ret = regmap_read(data->regmap, sattr->nr, &val);
465 if (ret < 0)
466 return ret;
467
468 return sprintf(buf, "%u\n", !!(val & (1 << bit)));
469}
470
471static ssize_t
472show_beep(struct device *dev, struct device_attribute *attr, char *buf)
473{
474 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
475 struct nct7802_data *data = dev_get_drvdata(dev);
476 unsigned int regval;
477 int err;
478
479 err = regmap_read(data->regmap, sattr->nr, ®val);
480 if (err)
481 return err;
482
483 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
484}
485
486static ssize_t
487store_beep(struct device *dev, struct device_attribute *attr, const char *buf,
488 size_t count)
489{
490 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
491 struct nct7802_data *data = dev_get_drvdata(dev);
492 unsigned long val;
493 int err;
494
495 err = kstrtoul(buf, 10, &val);
496 if (err < 0)
497 return err;
498 if (val > 1)
499 return -EINVAL;
500
501 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
502 val ? 1 << sattr->index : 0);
503 return err ? : count;
504}
505
506static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
507 show_temp_type, store_temp_type, 0);
508static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0x01,
509 REG_TEMP_LSB);
510static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp,
511 store_temp, 0x31, 0);
512static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp,
513 store_temp, 0x30, 0);
514static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp,
515 store_temp, 0x3a, 0);
516
517static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
518 show_temp_type, store_temp_type, 1);
519static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0x02,
520 REG_TEMP_LSB);
521static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp,
522 store_temp, 0x33, 0);
523static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp,
524 store_temp, 0x32, 0);
525static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp,
526 store_temp, 0x3b, 0);
527
528static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
529 show_temp_type, store_temp_type, 2);
530static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0x03,
531 REG_TEMP_LSB);
532static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp,
533 store_temp, 0x35, 0);
534static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp,
535 store_temp, 0x34, 0);
536static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp,
537 store_temp, 0x3c, 0);
538
539static SENSOR_DEVICE_ATTR_2(temp4_input, S_IRUGO, show_temp, NULL, 0x04, 0);
540static SENSOR_DEVICE_ATTR_2(temp4_min, S_IRUGO | S_IWUSR, show_temp,
541 store_temp, 0x37, 0);
542static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp,
543 store_temp, 0x36, 0);
544static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp,
545 store_temp, 0x3d, 0);
546
547static SENSOR_DEVICE_ATTR_2(temp5_input, S_IRUGO, show_temp, NULL, 0x06,
548 REG_TEMP_PECI_LSB);
549static SENSOR_DEVICE_ATTR_2(temp5_min, S_IRUGO | S_IWUSR, show_temp,
550 store_temp, 0x39, 0);
551static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp,
552 store_temp, 0x38, 0);
553static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp,
554 store_temp, 0x3e, 0);
555
556static SENSOR_DEVICE_ATTR_2(temp6_input, S_IRUGO, show_temp, NULL, 0x07,
557 REG_TEMP_PECI_LSB);
558
559static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
560 0x18, 0);
561static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_alarm, NULL,
562 0x18, 1);
563static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_alarm, NULL,
564 0x18, 2);
565static SENSOR_DEVICE_ATTR_2(temp4_min_alarm, S_IRUGO, show_alarm, NULL,
566 0x18, 3);
567static SENSOR_DEVICE_ATTR_2(temp5_min_alarm, S_IRUGO, show_alarm, NULL,
568 0x18, 4);
569
570static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
571 0x19, 0);
572static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_alarm, NULL,
573 0x19, 1);
574static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_alarm, NULL,
575 0x19, 2);
576static SENSOR_DEVICE_ATTR_2(temp4_max_alarm, S_IRUGO, show_alarm, NULL,
577 0x19, 3);
578static SENSOR_DEVICE_ATTR_2(temp5_max_alarm, S_IRUGO, show_alarm, NULL,
579 0x19, 4);
580
581static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
582 0x1b, 0);
583static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_alarm, NULL,
584 0x1b, 1);
585static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_alarm, NULL,
586 0x1b, 2);
587static SENSOR_DEVICE_ATTR_2(temp4_crit_alarm, S_IRUGO, show_alarm, NULL,
588 0x1b, 3);
589static SENSOR_DEVICE_ATTR_2(temp5_crit_alarm, S_IRUGO, show_alarm, NULL,
590 0x1b, 4);
591
592static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_alarm, NULL, 0x17, 0);
593static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_alarm, NULL, 0x17, 1);
594static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_alarm, NULL, 0x17, 2);
595
596static SENSOR_DEVICE_ATTR_2(temp1_beep, S_IRUGO | S_IWUSR, show_beep,
597 store_beep, 0x5c, 0);
598static SENSOR_DEVICE_ATTR_2(temp2_beep, S_IRUGO | S_IWUSR, show_beep,
599 store_beep, 0x5c, 1);
600static SENSOR_DEVICE_ATTR_2(temp3_beep, S_IRUGO | S_IWUSR, show_beep,
601 store_beep, 0x5c, 2);
602static SENSOR_DEVICE_ATTR_2(temp4_beep, S_IRUGO | S_IWUSR, show_beep,
603 store_beep, 0x5c, 3);
604static SENSOR_DEVICE_ATTR_2(temp5_beep, S_IRUGO | S_IWUSR, show_beep,
605 store_beep, 0x5c, 4);
606static SENSOR_DEVICE_ATTR_2(temp6_beep, S_IRUGO | S_IWUSR, show_beep,
607 store_beep, 0x5c, 5);
608
609static struct attribute *nct7802_temp_attrs[] = {
610 &sensor_dev_attr_temp1_type.dev_attr.attr,
611 &sensor_dev_attr_temp1_input.dev_attr.attr,
612 &sensor_dev_attr_temp1_min.dev_attr.attr,
613 &sensor_dev_attr_temp1_max.dev_attr.attr,
614 &sensor_dev_attr_temp1_crit.dev_attr.attr,
615 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
616 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
617 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
618 &sensor_dev_attr_temp1_fault.dev_attr.attr,
619 &sensor_dev_attr_temp1_beep.dev_attr.attr,
620
621 &sensor_dev_attr_temp2_type.dev_attr.attr,
622 &sensor_dev_attr_temp2_input.dev_attr.attr,
623 &sensor_dev_attr_temp2_min.dev_attr.attr,
624 &sensor_dev_attr_temp2_max.dev_attr.attr,
625 &sensor_dev_attr_temp2_crit.dev_attr.attr,
626 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
627 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
628 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
629 &sensor_dev_attr_temp2_fault.dev_attr.attr,
630 &sensor_dev_attr_temp2_beep.dev_attr.attr,
631
632 &sensor_dev_attr_temp3_type.dev_attr.attr,
633 &sensor_dev_attr_temp3_input.dev_attr.attr,
634 &sensor_dev_attr_temp3_min.dev_attr.attr,
635 &sensor_dev_attr_temp3_max.dev_attr.attr,
636 &sensor_dev_attr_temp3_crit.dev_attr.attr,
637 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
638 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
639 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
640 &sensor_dev_attr_temp3_fault.dev_attr.attr,
641 &sensor_dev_attr_temp3_beep.dev_attr.attr,
642
643 &sensor_dev_attr_temp4_input.dev_attr.attr,
644 &sensor_dev_attr_temp4_min.dev_attr.attr,
645 &sensor_dev_attr_temp4_max.dev_attr.attr,
646 &sensor_dev_attr_temp4_crit.dev_attr.attr,
647 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
648 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
649 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
650 &sensor_dev_attr_temp4_beep.dev_attr.attr,
651
652 &sensor_dev_attr_temp5_input.dev_attr.attr,
653 &sensor_dev_attr_temp5_min.dev_attr.attr,
654 &sensor_dev_attr_temp5_max.dev_attr.attr,
655 &sensor_dev_attr_temp5_crit.dev_attr.attr,
656 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
657 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
658 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
659 &sensor_dev_attr_temp5_beep.dev_attr.attr,
660
661 &sensor_dev_attr_temp6_input.dev_attr.attr,
662 &sensor_dev_attr_temp6_beep.dev_attr.attr,
663
664 NULL
665};
666
667static umode_t nct7802_temp_is_visible(struct kobject *kobj,
668 struct attribute *attr, int index)
669{
670 struct device *dev = container_of(kobj, struct device, kobj);
671 struct nct7802_data *data = dev_get_drvdata(dev);
672 unsigned int reg;
673 int err;
674
675 err = regmap_read(data->regmap, REG_MODE, ®);
676 if (err < 0)
677 return 0;
678
679 if (index < 10 &&
680 (reg & 03) != 0x01 && (reg & 0x03) != 0x02)
681 return 0;
682
683 if (index >= 10 && index < 20 &&
684 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08)
685 return 0;
686 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20)
687 return 0;
688
689 if (index >= 30 && index < 38)
690 return attr->mode;
691
692 err = regmap_read(data->regmap, REG_PECI_ENABLE, ®);
693 if (err < 0)
694 return 0;
695
696 if (index >= 38 && index < 46 && !(reg & 0x01))
697 return 0;
698
699 if (index >= 0x46 && (!(reg & 0x02)))
700 return 0;
701
702 return attr->mode;
703}
704
705static struct attribute_group nct7802_temp_group = {
706 .attrs = nct7802_temp_attrs,
707 .is_visible = nct7802_temp_is_visible,
708};
709
710static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
711static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, store_in,
712 0, 1);
713static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, store_in,
714 0, 2);
715static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 3);
716static SENSOR_DEVICE_ATTR_2(in0_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
717 0x5a, 3);
718
719static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
720
721static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
722static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, store_in,
723 2, 1);
724static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, store_in,
725 2, 2);
726static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 0);
727static SENSOR_DEVICE_ATTR_2(in2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
728 0x5a, 0);
729
730static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
731static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, store_in,
732 3, 1);
733static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, store_in,
734 3, 2);
735static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 1);
736static SENSOR_DEVICE_ATTR_2(in3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
737 0x5a, 1);
738
739static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
740static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, store_in,
741 4, 1);
742static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, store_in,
743 4, 2);
744static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_alarm, NULL, 0x1e, 2);
745static SENSOR_DEVICE_ATTR_2(in4_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
746 0x5a, 2);
747
748static struct attribute *nct7802_in_attrs[] = {
749 &sensor_dev_attr_in0_input.dev_attr.attr,
750 &sensor_dev_attr_in0_min.dev_attr.attr,
751 &sensor_dev_attr_in0_max.dev_attr.attr,
752 &sensor_dev_attr_in0_alarm.dev_attr.attr,
753 &sensor_dev_attr_in0_beep.dev_attr.attr,
754
755 &sensor_dev_attr_in1_input.dev_attr.attr,
756
757 &sensor_dev_attr_in2_input.dev_attr.attr,
758 &sensor_dev_attr_in2_min.dev_attr.attr,
759 &sensor_dev_attr_in2_max.dev_attr.attr,
760 &sensor_dev_attr_in2_alarm.dev_attr.attr,
761 &sensor_dev_attr_in2_beep.dev_attr.attr,
762
763 &sensor_dev_attr_in3_input.dev_attr.attr,
764 &sensor_dev_attr_in3_min.dev_attr.attr,
765 &sensor_dev_attr_in3_max.dev_attr.attr,
766 &sensor_dev_attr_in3_alarm.dev_attr.attr,
767 &sensor_dev_attr_in3_beep.dev_attr.attr,
768
769 &sensor_dev_attr_in4_input.dev_attr.attr,
770 &sensor_dev_attr_in4_min.dev_attr.attr,
771 &sensor_dev_attr_in4_max.dev_attr.attr,
772 &sensor_dev_attr_in4_alarm.dev_attr.attr,
773 &sensor_dev_attr_in4_beep.dev_attr.attr,
774
775 NULL,
776};
777
778static umode_t nct7802_in_is_visible(struct kobject *kobj,
779 struct attribute *attr, int index)
780{
781 struct device *dev = container_of(kobj, struct device, kobj);
782 struct nct7802_data *data = dev_get_drvdata(dev);
783 unsigned int reg;
784 int err;
785
786 if (index < 6)
787 return attr->mode;
788
789 err = regmap_read(data->regmap, REG_MODE, ®);
790 if (err < 0)
791 return 0;
792
793 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03)
794 return 0;
795 if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c)
796 return 0;
797 if (index >= 17 && (reg & 0x30) != 0x30)
798 return 0;
799
800 return attr->mode;
801}
802
803static struct attribute_group nct7802_in_group = {
804 .attrs = nct7802_in_attrs,
805 .is_visible = nct7802_in_is_visible,
806};
807
808static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0x10);
809static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan_min,
810 store_fan_min, 0x49, 0x4c);
811static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 0);
812static SENSOR_DEVICE_ATTR_2(fan1_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
813 0x5b, 0);
814static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 0x11);
815static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan_min,
816 store_fan_min, 0x4a, 0x4d);
817static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 1);
818static SENSOR_DEVICE_ATTR_2(fan2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
819 0x5b, 1);
820static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 0x12);
821static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan_min,
822 store_fan_min, 0x4b, 0x4e);
823static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2);
824static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
825 0x5b, 2);
826
827
828static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
829static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
830static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
831
832
833static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
834 REG_PWM(0));
835static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
836 REG_PWM(1));
837static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
838 REG_PWM(2));
839
840
841static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
842 store_pwm_enable, 0);
843static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
844 store_pwm_enable, 1);
845static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
846 store_pwm_enable, 2);
847
848static struct attribute *nct7802_fan_attrs[] = {
849 &sensor_dev_attr_fan1_input.dev_attr.attr,
850 &sensor_dev_attr_fan1_min.dev_attr.attr,
851 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
852 &sensor_dev_attr_fan1_beep.dev_attr.attr,
853 &sensor_dev_attr_fan2_input.dev_attr.attr,
854 &sensor_dev_attr_fan2_min.dev_attr.attr,
855 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
856 &sensor_dev_attr_fan2_beep.dev_attr.attr,
857 &sensor_dev_attr_fan3_input.dev_attr.attr,
858 &sensor_dev_attr_fan3_min.dev_attr.attr,
859 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
860 &sensor_dev_attr_fan3_beep.dev_attr.attr,
861
862 NULL
863};
864
865static umode_t nct7802_fan_is_visible(struct kobject *kobj,
866 struct attribute *attr, int index)
867{
868 struct device *dev = container_of(kobj, struct device, kobj);
869 struct nct7802_data *data = dev_get_drvdata(dev);
870 int fan = index / 4;
871 unsigned int reg;
872 int err;
873
874 err = regmap_read(data->regmap, REG_FAN_ENABLE, ®);
875 if (err < 0 || !(reg & (1 << fan)))
876 return 0;
877
878 return attr->mode;
879}
880
881static struct attribute_group nct7802_fan_group = {
882 .attrs = nct7802_fan_attrs,
883 .is_visible = nct7802_fan_is_visible,
884};
885
886static struct attribute *nct7802_pwm_attrs[] = {
887 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
888 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
889 &sensor_dev_attr_pwm1.dev_attr.attr,
890 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
891 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
892 &sensor_dev_attr_pwm2.dev_attr.attr,
893 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
894 &sensor_dev_attr_pwm3_mode.dev_attr.attr,
895 &sensor_dev_attr_pwm3.dev_attr.attr,
896 NULL
897};
898
899static struct attribute_group nct7802_pwm_group = {
900 .attrs = nct7802_pwm_attrs,
901};
902
903
904static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
905 show_temp, store_temp, 0x80, 0);
906static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
907 show_temp, store_temp, 0x81, 0);
908static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
909 show_temp, store_temp, 0x82, 0);
910static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
911 show_temp, store_temp, 0x83, 0);
912static SENSOR_DEVICE_ATTR_2(pwm1_auto_point5_temp, S_IRUGO | S_IWUSR,
913 show_temp, store_temp, 0x84, 0);
914
915
916static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
917 show_pwm, store_pwm, 0x85);
918static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
919 show_pwm, store_pwm, 0x86);
920static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
921 show_pwm, store_pwm, 0x87);
922static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IRUGO | S_IWUSR,
923 show_pwm, store_pwm, 0x88);
924static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
925
926
927static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
928 show_temp, store_temp, 0x90, 0);
929static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
930 show_temp, store_temp, 0x91, 0);
931static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
932 show_temp, store_temp, 0x92, 0);
933static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
934 show_temp, store_temp, 0x93, 0);
935static SENSOR_DEVICE_ATTR_2(pwm2_auto_point5_temp, S_IRUGO | S_IWUSR,
936 show_temp, store_temp, 0x94, 0);
937
938
939static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
940 show_pwm, store_pwm, 0x95);
941static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
942 show_pwm, store_pwm, 0x96);
943static SENSOR_DEVICE_ATTR(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
944 show_pwm, store_pwm, 0x97);
945static SENSOR_DEVICE_ATTR(pwm2_auto_point4_pwm, S_IRUGO | S_IWUSR,
946 show_pwm, store_pwm, 0x98);
947static SENSOR_DEVICE_ATTR(pwm2_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
948
949
950static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
951 show_temp, store_temp, 0xA0, 0);
952static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
953 show_temp, store_temp, 0xA1, 0);
954static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
955 show_temp, store_temp, 0xA2, 0);
956static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
957 show_temp, store_temp, 0xA3, 0);
958static SENSOR_DEVICE_ATTR_2(pwm3_auto_point5_temp, S_IRUGO | S_IWUSR,
959 show_temp, store_temp, 0xA4, 0);
960
961
962static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
963 show_pwm, store_pwm, 0xA5);
964static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
965 show_pwm, store_pwm, 0xA6);
966static SENSOR_DEVICE_ATTR(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
967 show_pwm, store_pwm, 0xA7);
968static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR,
969 show_pwm, store_pwm, 0xA8);
970static SENSOR_DEVICE_ATTR(pwm3_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
971
972static struct attribute *nct7802_auto_point_attrs[] = {
973 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
974 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
975 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
976 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
977 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
978
979 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
980 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
981 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
982 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
983 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
984
985 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
986 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
987 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
988 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
989 &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
990
991 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
992 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
993 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
994 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
995 &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
996
997 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
998 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
999 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1000 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1001 &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr,
1002
1003 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1004 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1005 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1006 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1007 &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr,
1008
1009 NULL
1010};
1011
1012static struct attribute_group nct7802_auto_point_group = {
1013 .attrs = nct7802_auto_point_attrs,
1014};
1015
1016static const struct attribute_group *nct7802_groups[] = {
1017 &nct7802_temp_group,
1018 &nct7802_in_group,
1019 &nct7802_fan_group,
1020 &nct7802_pwm_group,
1021 &nct7802_auto_point_group,
1022 NULL
1023};
1024
1025static int nct7802_detect(struct i2c_client *client,
1026 struct i2c_board_info *info)
1027{
1028 int reg;
1029
1030
1031
1032
1033
1034 reg = i2c_smbus_read_byte_data(client, REG_BANK);
1035 if (reg != 0x00)
1036 return -ENODEV;
1037
1038 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
1039 if (reg != 0x50)
1040 return -ENODEV;
1041
1042 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
1043 if (reg != 0xc3)
1044 return -ENODEV;
1045
1046 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
1047 if (reg < 0 || (reg & 0xf0) != 0x20)
1048 return -ENODEV;
1049
1050
1051 reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB);
1052 if (reg < 0 || (reg & 0x1f))
1053 return -ENODEV;
1054
1055 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
1056 if (reg < 0 || (reg & 0x3f))
1057 return -ENODEV;
1058
1059 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
1060 if (reg < 0 || (reg & 0x3f))
1061 return -ENODEV;
1062
1063 strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
1064 return 0;
1065}
1066
1067static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
1068{
1069 return (reg != REG_BANK && reg <= 0x20) ||
1070 (reg >= REG_PWM(0) && reg <= REG_PWM(2));
1071}
1072
1073static const struct regmap_config nct7802_regmap_config = {
1074 .reg_bits = 8,
1075 .val_bits = 8,
1076 .cache_type = REGCACHE_RBTREE,
1077 .volatile_reg = nct7802_regmap_is_volatile,
1078};
1079
1080static int nct7802_init_chip(struct nct7802_data *data)
1081{
1082 int err;
1083
1084
1085 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
1086 if (err)
1087 return err;
1088
1089
1090 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
1091 if (err)
1092 return err;
1093
1094
1095 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
1096}
1097
1098static int nct7802_probe(struct i2c_client *client,
1099 const struct i2c_device_id *id)
1100{
1101 struct device *dev = &client->dev;
1102 struct nct7802_data *data;
1103 struct device *hwmon_dev;
1104 int ret;
1105
1106 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1107 if (data == NULL)
1108 return -ENOMEM;
1109
1110 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
1111 if (IS_ERR(data->regmap))
1112 return PTR_ERR(data->regmap);
1113
1114 mutex_init(&data->access_lock);
1115
1116 ret = nct7802_init_chip(data);
1117 if (ret < 0)
1118 return ret;
1119
1120 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1121 data,
1122 nct7802_groups);
1123 return PTR_ERR_OR_ZERO(hwmon_dev);
1124}
1125
1126static const unsigned short nct7802_address_list[] = {
1127 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1128};
1129
1130static const struct i2c_device_id nct7802_idtable[] = {
1131 { "nct7802", 0 },
1132 { }
1133};
1134MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1135
1136static struct i2c_driver nct7802_driver = {
1137 .class = I2C_CLASS_HWMON,
1138 .driver = {
1139 .name = DRVNAME,
1140 },
1141 .detect = nct7802_detect,
1142 .probe = nct7802_probe,
1143 .id_table = nct7802_idtable,
1144 .address_list = nct7802_address_list,
1145};
1146
1147module_i2c_driver(nct7802_driver);
1148
1149MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1150MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1151MODULE_LICENSE("GPL v2");
1152
