2 * nct7802 - Driver for Nuvoton NCT7802Y
4 * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net>
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.
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.
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
30 #define DRVNAME "nct7802"
32 static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e };
34 static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = {
35 { 0x40, 0x00, 0x42, 0x44, 0x46 },
36 { 0x3f, 0x00, 0x41, 0x43, 0x45 },
39 static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 };
41 static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = {
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 /* 7.2.32 Mode Selection Register */
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
64 * Data structures and manipulation thereof
68 struct regmap *regmap;
69 struct mutex access_lock; /* for multi-byte read and write operations */
72 static ssize_t temp_type_show(struct device *dev,
73 struct device_attribute *attr, char *buf)
75 struct nct7802_data *data = dev_get_drvdata(dev);
76 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
80 ret = regmap_read(data->regmap, REG_MODE, &mode);
84 return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2);
87 static ssize_t temp_type_store(struct device *dev,
88 struct device_attribute *attr, const char *buf,
91 struct nct7802_data *data = dev_get_drvdata(dev);
92 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
96 err = kstrtouint(buf, 0, &type);
99 if (sattr->index == 2 && type != 4) /* RD3 */
101 if (type < 3 || type > 4)
103 err = regmap_update_bits(data->regmap, REG_MODE,
104 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index);
105 return err ? : count;
108 static ssize_t pwm_mode_show(struct device *dev,
109 struct device_attribute *attr, char *buf)
111 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
112 struct nct7802_data *data = dev_get_drvdata(dev);
116 if (sattr->index > 1)
117 return sprintf(buf, "1\n");
119 ret = regmap_read(data->regmap, 0x5E, ®val);
123 return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
126 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
129 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
130 struct nct7802_data *data = dev_get_drvdata(dev);
135 return sprintf(buf, "255\n");
137 ret = regmap_read(data->regmap, attr->index, &val);
141 return sprintf(buf, "%d\n", val);
144 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
145 const char *buf, size_t count)
147 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
148 struct nct7802_data *data = dev_get_drvdata(dev);
152 err = kstrtou8(buf, 0, &val);
156 err = regmap_write(data->regmap, attr->index, val);
157 return err ? : count;
160 static ssize_t pwm_enable_show(struct device *dev,
161 struct device_attribute *attr, char *buf)
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;
168 ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), ®);
171 enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1;
172 return sprintf(buf, "%u\n", enabled + 1);
175 static ssize_t pwm_enable_store(struct device *dev,
176 struct device_attribute *attr,
177 const char *buf, size_t count)
179 struct nct7802_data *data = dev_get_drvdata(dev);
180 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
184 ret = kstrtou8(buf, 0, &val);
187 if (val < 1 || val > 2)
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;
195 static int nct7802_read_temp(struct nct7802_data *data,
196 u8 reg_temp, u8 reg_temp_low, int *temp)
198 unsigned int t1, t2 = 0;
203 mutex_lock(&data->access_lock);
204 err = regmap_read(data->regmap, reg_temp, &t1);
208 if (reg_temp_low) { /* 11 bit data */
209 err = regmap_read(data->regmap, reg_temp_low, &t2);
214 *temp = (s16)t1 / 32 * 125;
216 mutex_unlock(&data->access_lock);
220 static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan)
225 mutex_lock(&data->access_lock);
226 ret = regmap_read(data->regmap, reg_fan, &f1);
229 ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2);
232 ret = (f1 << 5) | (f2 >> 3);
233 /* convert fan count to rpm */
234 if (ret == 0x1fff) /* maximum value, assume fan is stopped */
237 ret = DIV_ROUND_CLOSEST(1350000U, ret);
239 mutex_unlock(&data->access_lock);
243 static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low,
249 mutex_lock(&data->access_lock);
250 ret = regmap_read(data->regmap, reg_fan_low, &f1);
253 ret = regmap_read(data->regmap, reg_fan_high, &f2);
256 ret = f1 | ((f2 & 0xf8) << 5);
257 /* convert fan count to rpm */
258 if (ret == 0x1fff) /* maximum value, assume no limit */
261 ret = DIV_ROUND_CLOSEST(1350000U, ret);
265 mutex_unlock(&data->access_lock);
269 static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low,
270 u8 reg_fan_high, unsigned long limit)
275 limit = DIV_ROUND_CLOSEST(1350000U, limit);
278 limit = clamp_val(limit, 0, 0x1fff);
280 mutex_lock(&data->access_lock);
281 err = regmap_write(data->regmap, reg_fan_low, limit & 0xff);
285 err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5);
287 mutex_unlock(&data->access_lock);
291 static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 };
293 static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index)
298 mutex_lock(&data->access_lock);
299 if (index == 0) { /* voltage */
300 ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1);
303 ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2);
306 ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr];
308 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
310 ret = regmap_read(data->regmap,
311 REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1);
314 ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
318 ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr];
321 mutex_unlock(&data->access_lock);
325 static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index,
326 unsigned long voltage)
328 int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr];
331 voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]);
332 voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]);
334 mutex_lock(&data->access_lock);
335 err = regmap_write(data->regmap,
336 REG_VOLTAGE_LIMIT_LSB[index - 1][nr],
341 err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr],
342 0x0300 >> shift, (voltage & 0x0300) >> shift);
344 mutex_unlock(&data->access_lock);
348 static ssize_t in_show(struct device *dev, struct device_attribute *attr,
351 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
352 struct nct7802_data *data = dev_get_drvdata(dev);
355 voltage = nct7802_read_voltage(data, sattr->nr, sattr->index);
359 return sprintf(buf, "%d\n", voltage);
362 static ssize_t in_store(struct device *dev, struct device_attribute *attr,
363 const char *buf, size_t count)
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;
372 err = kstrtoul(buf, 10, &val);
376 err = nct7802_write_voltage(data, nr, index, val);
377 return err ? : count;
380 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
383 struct nct7802_data *data = dev_get_drvdata(dev);
384 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
387 err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp);
391 return sprintf(buf, "%d\n", temp);
394 static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
395 const char *buf, size_t count)
397 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
398 struct nct7802_data *data = dev_get_drvdata(dev);
403 err = kstrtol(buf, 10, &val);
407 val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000);
409 err = regmap_write(data->regmap, nr, val & 0xff);
410 return err ? : count;
413 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
416 struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
417 struct nct7802_data *data = dev_get_drvdata(dev);
420 speed = nct7802_read_fan(data, sattr->index);
424 return sprintf(buf, "%d\n", speed);
427 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
430 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
431 struct nct7802_data *data = dev_get_drvdata(dev);
434 speed = nct7802_read_fan_min(data, sattr->nr, sattr->index);
438 return sprintf(buf, "%d\n", speed);
441 static ssize_t fan_min_store(struct device *dev,
442 struct device_attribute *attr, const char *buf,
445 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
446 struct nct7802_data *data = dev_get_drvdata(dev);
450 err = kstrtoul(buf, 10, &val);
454 err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val);
455 return err ? : count;
458 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
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;
467 ret = regmap_read(data->regmap, sattr->nr, &val);
471 return sprintf(buf, "%u\n", !!(val & (1 << bit)));
475 beep_show(struct device *dev, struct device_attribute *attr, char *buf)
477 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
478 struct nct7802_data *data = dev_get_drvdata(dev);
482 err = regmap_read(data->regmap, sattr->nr, ®val);
486 return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index)));
490 beep_store(struct device *dev, struct device_attribute *attr, const char *buf,
493 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
494 struct nct7802_data *data = dev_get_drvdata(dev);
498 err = kstrtoul(buf, 10, &val);
504 err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index,
505 val ? 1 << sattr->index : 0);
506 return err ? : count;
509 static SENSOR_DEVICE_ATTR_RW(temp1_type, temp_type, 0);
510 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0x01, REG_TEMP_LSB);
511 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 0x31, 0);
512 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0x30, 0);
513 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0x3a, 0);
515 static SENSOR_DEVICE_ATTR_RW(temp2_type, temp_type, 1);
516 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0x02, REG_TEMP_LSB);
517 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 0x33, 0);
518 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 0x32, 0);
519 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 0x3b, 0);
521 static SENSOR_DEVICE_ATTR_RW(temp3_type, temp_type, 2);
522 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0x03, REG_TEMP_LSB);
523 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 0x35, 0);
524 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 0x34, 0);
525 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 0x3c, 0);
527 static SENSOR_DEVICE_ATTR_2_RO(temp4_input, temp, 0x04, 0);
528 static SENSOR_DEVICE_ATTR_2_RW(temp4_min, temp, 0x37, 0);
529 static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 0x36, 0);
530 static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 0x3d, 0);
532 static SENSOR_DEVICE_ATTR_2_RO(temp5_input, temp, 0x06, REG_TEMP_PECI_LSB);
533 static SENSOR_DEVICE_ATTR_2_RW(temp5_min, temp, 0x39, 0);
534 static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 0x38, 0);
535 static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 0x3e, 0);
537 static SENSOR_DEVICE_ATTR_2_RO(temp6_input, temp, 0x07, REG_TEMP_PECI_LSB);
539 static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, alarm, 0x18, 0);
540 static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, alarm, 0x18, 1);
541 static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, alarm, 0x18, 2);
542 static SENSOR_DEVICE_ATTR_2_RO(temp4_min_alarm, alarm, 0x18, 3);
543 static SENSOR_DEVICE_ATTR_2_RO(temp5_min_alarm, alarm, 0x18, 4);
545 static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, alarm, 0x19, 0);
546 static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, alarm, 0x19, 1);
547 static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, alarm, 0x19, 2);
548 static SENSOR_DEVICE_ATTR_2_RO(temp4_max_alarm, alarm, 0x19, 3);
549 static SENSOR_DEVICE_ATTR_2_RO(temp5_max_alarm, alarm, 0x19, 4);
551 static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, alarm, 0x1b, 0);
552 static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, alarm, 0x1b, 1);
553 static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, alarm, 0x1b, 2);
554 static SENSOR_DEVICE_ATTR_2_RO(temp4_crit_alarm, alarm, 0x1b, 3);
555 static SENSOR_DEVICE_ATTR_2_RO(temp5_crit_alarm, alarm, 0x1b, 4);
557 static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, alarm, 0x17, 0);
558 static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, alarm, 0x17, 1);
559 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, alarm, 0x17, 2);
561 static SENSOR_DEVICE_ATTR_2_RW(temp1_beep, beep, 0x5c, 0);
562 static SENSOR_DEVICE_ATTR_2_RW(temp2_beep, beep, 0x5c, 1);
563 static SENSOR_DEVICE_ATTR_2_RW(temp3_beep, beep, 0x5c, 2);
564 static SENSOR_DEVICE_ATTR_2_RW(temp4_beep, beep, 0x5c, 3);
565 static SENSOR_DEVICE_ATTR_2_RW(temp5_beep, beep, 0x5c, 4);
566 static SENSOR_DEVICE_ATTR_2_RW(temp6_beep, beep, 0x5c, 5);
568 static struct attribute *nct7802_temp_attrs[] = {
569 &sensor_dev_attr_temp1_type.dev_attr.attr,
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,
580 &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */
581 &sensor_dev_attr_temp2_input.dev_attr.attr,
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,
591 &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */
592 &sensor_dev_attr_temp3_input.dev_attr.attr,
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,
602 &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */
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,
611 &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */
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,
620 &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */
621 &sensor_dev_attr_temp6_beep.dev_attr.attr,
626 static umode_t nct7802_temp_is_visible(struct kobject *kobj,
627 struct attribute *attr, int index)
629 struct device *dev = container_of(kobj, struct device, kobj);
630 struct nct7802_data *data = dev_get_drvdata(dev);
634 err = regmap_read(data->regmap, REG_MODE, ®);
639 (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */
642 if (index >= 10 && index < 20 &&
643 (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */
645 if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */
648 if (index >= 30 && index < 38) /* local */
651 err = regmap_read(data->regmap, REG_PECI_ENABLE, ®);
655 if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */
658 if (index >= 0x46 && (!(reg & 0x02))) /* PECI 1 */
664 static const struct attribute_group nct7802_temp_group = {
665 .attrs = nct7802_temp_attrs,
666 .is_visible = nct7802_temp_is_visible,
669 static SENSOR_DEVICE_ATTR_2_RO(in0_input, in, 0, 0);
670 static SENSOR_DEVICE_ATTR_2_RW(in0_min, in, 0, 1);
671 static SENSOR_DEVICE_ATTR_2_RW(in0_max, in, 0, 2);
672 static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, alarm, 0x1e, 3);
673 static SENSOR_DEVICE_ATTR_2_RW(in0_beep, beep, 0x5a, 3);
675 static SENSOR_DEVICE_ATTR_2_RO(in1_input, in, 1, 0);
677 static SENSOR_DEVICE_ATTR_2_RO(in2_input, in, 2, 0);
678 static SENSOR_DEVICE_ATTR_2_RW(in2_min, in, 2, 1);
679 static SENSOR_DEVICE_ATTR_2_RW(in2_max, in, 2, 2);
680 static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, alarm, 0x1e, 0);
681 static SENSOR_DEVICE_ATTR_2_RW(in2_beep, beep, 0x5a, 0);
683 static SENSOR_DEVICE_ATTR_2_RO(in3_input, in, 3, 0);
684 static SENSOR_DEVICE_ATTR_2_RW(in3_min, in, 3, 1);
685 static SENSOR_DEVICE_ATTR_2_RW(in3_max, in, 3, 2);
686 static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, alarm, 0x1e, 1);
687 static SENSOR_DEVICE_ATTR_2_RW(in3_beep, beep, 0x5a, 1);
689 static SENSOR_DEVICE_ATTR_2_RO(in4_input, in, 4, 0);
690 static SENSOR_DEVICE_ATTR_2_RW(in4_min, in, 4, 1);
691 static SENSOR_DEVICE_ATTR_2_RW(in4_max, in, 4, 2);
692 static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, alarm, 0x1e, 2);
693 static SENSOR_DEVICE_ATTR_2_RW(in4_beep, beep, 0x5a, 2);
695 static 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,
702 &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */
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,
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,
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,
725 static umode_t nct7802_in_is_visible(struct kobject *kobj,
726 struct attribute *attr, int index)
728 struct device *dev = container_of(kobj, struct device, kobj);
729 struct nct7802_data *data = dev_get_drvdata(dev);
733 if (index < 6) /* VCC, VCORE */
736 err = regmap_read(data->regmap, REG_MODE, ®);
740 if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */
742 if (index >= 11 && index < 17 && (reg & 0x0c) != 0x0c) /* VSEN2 */
744 if (index >= 17 && (reg & 0x30) != 0x30) /* VSEN3 */
750 static const struct attribute_group nct7802_in_group = {
751 .attrs = nct7802_in_attrs,
752 .is_visible = nct7802_in_is_visible,
755 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0x10);
756 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, fan_min, 0x49, 0x4c);
757 static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, alarm, 0x1a, 0);
758 static SENSOR_DEVICE_ATTR_2_RW(fan1_beep, beep, 0x5b, 0);
759 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 0x11);
760 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, fan_min, 0x4a, 0x4d);
761 static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, alarm, 0x1a, 1);
762 static SENSOR_DEVICE_ATTR_2_RW(fan2_beep, beep, 0x5b, 1);
763 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 0x12);
764 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, fan_min, 0x4b, 0x4e);
765 static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, alarm, 0x1a, 2);
766 static SENSOR_DEVICE_ATTR_2_RW(fan3_beep, beep, 0x5b, 2);
768 /* 7.2.89 Fan Control Output Type */
769 static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0);
770 static SENSOR_DEVICE_ATTR_RO(pwm2_mode, pwm_mode, 1);
771 static SENSOR_DEVICE_ATTR_RO(pwm3_mode, pwm_mode, 2);
773 /* 7.2.91... Fan Control Output Value */
774 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, REG_PWM(0));
775 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, REG_PWM(1));
776 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, REG_PWM(2));
778 /* 7.2.95... Temperature to Fan mapping Relationships Register */
779 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
780 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
781 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
783 static 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,
800 static umode_t nct7802_fan_is_visible(struct kobject *kobj,
801 struct attribute *attr, int index)
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 */
809 err = regmap_read(data->regmap, REG_FAN_ENABLE, ®);
810 if (err < 0 || !(reg & (1 << fan)))
816 static const struct attribute_group nct7802_fan_group = {
817 .attrs = nct7802_fan_attrs,
818 .is_visible = nct7802_fan_is_visible,
821 static struct attribute *nct7802_pwm_attrs[] = {
822 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
823 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
824 &sensor_dev_attr_pwm1.dev_attr.attr,
825 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
826 &sensor_dev_attr_pwm2_mode.dev_attr.attr,
827 &sensor_dev_attr_pwm2.dev_attr.attr,
828 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
829 &sensor_dev_attr_pwm3_mode.dev_attr.attr,
830 &sensor_dev_attr_pwm3.dev_attr.attr,
834 static const struct attribute_group nct7802_pwm_group = {
835 .attrs = nct7802_pwm_attrs,
838 /* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */
839 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_temp, temp, 0x80, 0);
840 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_temp, temp, 0x81, 0);
841 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point3_temp, temp, 0x82, 0);
842 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point4_temp, temp, 0x83, 0);
843 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point5_temp, temp, 0x84, 0);
845 /* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */
846 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm, 0x85);
847 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm, 0x86);
848 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point3_pwm, pwm, 0x87);
849 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point4_pwm, pwm, 0x88);
850 static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point5_pwm, pwm, 0);
852 /* 7.2.124 Table 2 X-axis Transition Point 1 Register */
853 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_temp, temp, 0x90, 0);
854 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_temp, temp, 0x91, 0);
855 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point3_temp, temp, 0x92, 0);
856 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point4_temp, temp, 0x93, 0);
857 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point5_temp, temp, 0x94, 0);
859 /* 7.2.129 Table 2 Y-axis Transition Point 1 Register */
860 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm, 0x95);
861 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm, 0x96);
862 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point3_pwm, pwm, 0x97);
863 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point4_pwm, pwm, 0x98);
864 static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point5_pwm, pwm, 0);
866 /* 7.2.133 Table 3 X-axis Transition Point 1 Register */
867 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_temp, temp, 0xA0, 0);
868 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_temp, temp, 0xA1, 0);
869 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point3_temp, temp, 0xA2, 0);
870 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point4_temp, temp, 0xA3, 0);
871 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point5_temp, temp, 0xA4, 0);
873 /* 7.2.138 Table 3 Y-axis Transition Point 1 Register */
874 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm, 0xA5);
875 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm, 0xA6);
876 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point3_pwm, pwm, 0xA7);
877 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point4_pwm, pwm, 0xA8);
878 static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point5_pwm, pwm, 0);
880 static 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,
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,
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,
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,
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,
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,
920 static const struct attribute_group nct7802_auto_point_group = {
921 .attrs = nct7802_auto_point_attrs,
924 static const struct attribute_group *nct7802_groups[] = {
929 &nct7802_auto_point_group,
933 static int nct7802_detect(struct i2c_client *client,
934 struct i2c_board_info *info)
939 * Chip identification registers are only available in bank 0,
940 * so only attempt chip detection if bank 0 is selected
942 reg = i2c_smbus_read_byte_data(client, REG_BANK);
946 reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID);
950 reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID);
954 reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID);
955 if (reg < 0 || (reg & 0xf0) != 0x20)
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))
963 reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB);
964 if (reg < 0 || (reg & 0x3f))
967 reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW);
968 if (reg < 0 || (reg & 0x3f))
971 strlcpy(info->type, "nct7802", I2C_NAME_SIZE);
975 static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
977 return (reg != REG_BANK && reg <= 0x20) ||
978 (reg >= REG_PWM(0) && reg <= REG_PWM(2));
981 static const struct regmap_config nct7802_regmap_config = {
984 .cache_type = REGCACHE_RBTREE,
985 .volatile_reg = nct7802_regmap_is_volatile,
988 static int nct7802_init_chip(struct nct7802_data *data)
993 err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01);
997 /* Enable local temperature sensor */
998 err = regmap_update_bits(data->regmap, REG_MODE, 0x40, 0x40);
1002 /* Enable Vcore and VCC voltage monitoring */
1003 return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03);
1006 static int nct7802_probe(struct i2c_client *client,
1007 const struct i2c_device_id *id)
1009 struct device *dev = &client->dev;
1010 struct nct7802_data *data;
1011 struct device *hwmon_dev;
1014 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
1018 data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config);
1019 if (IS_ERR(data->regmap))
1020 return PTR_ERR(data->regmap);
1022 mutex_init(&data->access_lock);
1024 ret = nct7802_init_chip(data);
1028 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1031 return PTR_ERR_OR_ZERO(hwmon_dev);
1034 static const unsigned short nct7802_address_list[] = {
1035 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
1038 static const struct i2c_device_id nct7802_idtable[] = {
1042 MODULE_DEVICE_TABLE(i2c, nct7802_idtable);
1044 static struct i2c_driver nct7802_driver = {
1045 .class = I2C_CLASS_HWMON,
1049 .detect = nct7802_detect,
1050 .probe = nct7802_probe,
1051 .id_table = nct7802_idtable,
1052 .address_list = nct7802_address_list,
1055 module_i2c_driver(nct7802_driver);
1057 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
1058 MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver");
1059 MODULE_LICENSE("GPL v2");