2 * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
3 * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
4 * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
5 * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
7 * Derived from the lm83 driver by Jean Delvare
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/i2c.h>
18 #include <linux/hwmon.h>
19 #include <linux/hwmon-sysfs.h>
20 #include <linux/err.h>
22 /* Indexes for the sysfs hooks */
33 /* These are unique identifiers for the sysfs functions - unlike the
34 numbers above, these are not also indexes into an array
40 /* 7475 Common Registers */
42 #define REG_VOLTAGE_BASE 0x21
43 #define REG_TEMP_BASE 0x25
44 #define REG_TACH_BASE 0x28
45 #define REG_PWM_BASE 0x30
46 #define REG_PWM_MAX_BASE 0x38
48 #define REG_DEVID 0x3D
49 #define REG_VENDID 0x3E
51 #define REG_STATUS1 0x41
52 #define REG_STATUS2 0x42
54 #define REG_VOLTAGE_MIN_BASE 0x46
55 #define REG_VOLTAGE_MAX_BASE 0x47
57 #define REG_TEMP_MIN_BASE 0x4E
58 #define REG_TEMP_MAX_BASE 0x4F
60 #define REG_TACH_MIN_BASE 0x54
62 #define REG_PWM_CONFIG_BASE 0x5C
64 #define REG_TEMP_TRANGE_BASE 0x5F
66 #define REG_PWM_MIN_BASE 0x64
68 #define REG_TEMP_TMIN_BASE 0x67
69 #define REG_TEMP_THERM_BASE 0x6A
71 #define REG_REMOTE1_HYSTERSIS 0x6D
72 #define REG_REMOTE2_HYSTERSIS 0x6E
74 #define REG_TEMP_OFFSET_BASE 0x70
76 #define REG_EXTEND1 0x76
77 #define REG_EXTEND2 0x77
78 #define REG_CONFIG5 0x7C
79 #define REG_CONFIG4 0x7D
81 #define CONFIG4_MAXDUTY 0x08
83 #define CONFIG5_TWOSCOMP 0x01
84 #define CONFIG5_TEMPOFFSET 0x02
86 /* ADT7475 Settings */
88 #define ADT7475_VOLTAGE_COUNT 2
89 #define ADT7475_TEMP_COUNT 3
90 #define ADT7475_TACH_COUNT 4
91 #define ADT7475_PWM_COUNT 3
93 /* Macro to read the registers */
95 #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
97 /* Macros to easily index the registers */
99 #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
100 #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
102 #define PWM_REG(idx) (REG_PWM_BASE + (idx))
103 #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
104 #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
105 #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
107 #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
108 #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
109 #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
111 #define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
112 #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
113 #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
114 #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
115 #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
116 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
117 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
119 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
121 I2C_CLIENT_INSMOD_2(adt7473, adt7475);
123 static const struct i2c_device_id adt7475_id[] = {
124 { "adt7473", adt7473 },
125 { "adt7475", adt7475 },
128 MODULE_DEVICE_TABLE(i2c, adt7475_id);
130 struct adt7475_data {
131 struct device *hwmon_dev;
134 unsigned long measure_updated;
135 unsigned long limits_updated;
150 static struct i2c_driver adt7475_driver;
151 static struct adt7475_data *adt7475_update_device(struct device *dev);
152 static void adt7475_read_hystersis(struct i2c_client *client);
153 static void adt7475_read_pwm(struct i2c_client *client, int index);
155 /* Given a temp value, convert it to register value */
157 static inline u16 temp2reg(struct adt7475_data *data, long val)
161 if (!(data->config5 & CONFIG5_TWOSCOMP)) {
162 val = SENSORS_LIMIT(val, -64000, 191000);
163 ret = (val + 64500) / 1000;
165 val = SENSORS_LIMIT(val, -128000, 127000);
167 ret = (256500 + val) / 1000;
169 ret = (val + 500) / 1000;
175 /* Given a register value, convert it to a real temp value */
177 static inline int reg2temp(struct adt7475_data *data, u16 reg)
179 if (data->config5 & CONFIG5_TWOSCOMP) {
181 return (reg - 1024) * 250;
185 return (reg - 256) * 250;
188 static inline int tach2rpm(u16 tach)
190 if (tach == 0 || tach == 0xFFFF)
193 return (90000 * 60) / tach;
196 static inline u16 rpm2tach(unsigned long rpm)
201 return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF);
204 static inline int reg2vcc(u16 reg)
206 return (4296 * reg) / 1000;
209 static inline int reg2vccp(u16 reg)
211 return (2929 * reg) / 1000;
214 static inline u16 vcc2reg(long vcc)
216 vcc = SENSORS_LIMIT(vcc, 0, 4396);
217 return (vcc * 1000) / 4296;
220 static inline u16 vccp2reg(long vcc)
222 vcc = SENSORS_LIMIT(vcc, 0, 2998);
223 return (vcc * 1000) / 2929;
226 static u16 adt7475_read_word(struct i2c_client *client, int reg)
230 val = i2c_smbus_read_byte_data(client, reg);
231 val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8);
236 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
238 i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
239 i2c_smbus_write_byte_data(client, reg, val & 0xFF);
242 /* Find the nearest value in a table - used for pwm frequency and
244 static int find_nearest(long val, const int *array, int size)
251 if (val > array[size - 1])
254 for (i = 0; i < size - 1; i++) {
257 if (val > array[i + 1])
261 b = array[i + 1] - val;
263 return (a <= b) ? i : i + 1;
269 static ssize_t show_voltage(struct device *dev, struct device_attribute *attr,
272 struct adt7475_data *data = adt7475_update_device(dev);
273 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
278 return sprintf(buf, "%d\n",
279 (data->alarms >> (sattr->index + 1)) & 1);
281 val = data->voltage[sattr->nr][sattr->index];
282 return sprintf(buf, "%d\n",
284 0 ? reg2vccp(val) : reg2vcc(val));
288 static ssize_t set_voltage(struct device *dev, struct device_attribute *attr,
289 const char *buf, size_t count)
292 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
293 struct i2c_client *client = to_i2c_client(dev);
294 struct adt7475_data *data = i2c_get_clientdata(client);
298 if (strict_strtol(buf, 10, &val))
301 mutex_lock(&data->lock);
303 data->voltage[sattr->nr][sattr->index] =
304 sattr->index ? vcc2reg(val) : vccp2reg(val);
306 if (sattr->nr == MIN)
307 reg = VOLTAGE_MIN_REG(sattr->index);
309 reg = VOLTAGE_MAX_REG(sattr->index);
311 i2c_smbus_write_byte_data(client, reg,
312 data->voltage[sattr->nr][sattr->index] >> 2);
313 mutex_unlock(&data->lock);
318 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
321 struct adt7475_data *data = adt7475_update_device(dev);
322 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
327 mutex_lock(&data->lock);
328 out = data->temp[sattr->nr][sattr->index];
329 if (sattr->index != 1)
330 out = (out >> 4) & 0xF;
333 /* Show the value as an absolute number tied to
335 out = reg2temp(data, data->temp[THERM][sattr->index]) -
337 mutex_unlock(&data->lock);
341 /* Offset is always 2's complement, regardless of the
342 * setting in CONFIG5 */
343 mutex_lock(&data->lock);
344 out = (s8)data->temp[sattr->nr][sattr->index];
345 if (data->config5 & CONFIG5_TEMPOFFSET)
349 mutex_unlock(&data->lock);
353 out = (data->alarms >> (sattr->index + 4)) & 1;
357 /* Note - only for remote1 and remote2 */
358 out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
362 /* All other temp values are in the configured format */
363 out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
366 return sprintf(buf, "%d\n", out);
369 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
370 const char *buf, size_t count)
372 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
373 struct i2c_client *client = to_i2c_client(dev);
374 struct adt7475_data *data = i2c_get_clientdata(client);
375 unsigned char reg = 0;
380 if (strict_strtol(buf, 10, &val))
383 mutex_lock(&data->lock);
385 /* We need the config register in all cases for temp <-> reg conv. */
386 data->config5 = adt7475_read(REG_CONFIG5);
390 if (data->config5 & CONFIG5_TEMPOFFSET) {
391 val = SENSORS_LIMIT(val, -63000, 127000);
392 out = data->temp[OFFSET][sattr->index] = val / 1000;
394 val = SENSORS_LIMIT(val, -63000, 64000);
395 out = data->temp[OFFSET][sattr->index] = val / 500;
400 /* The value will be given as an absolute value, turn it
401 into an offset based on THERM */
403 /* Read fresh THERM and HYSTERSIS values from the chip */
404 data->temp[THERM][sattr->index] =
405 adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
406 adt7475_read_hystersis(client);
408 temp = reg2temp(data, data->temp[THERM][sattr->index]);
409 val = SENSORS_LIMIT(val, temp - 15000, temp);
410 val = (temp - val) / 1000;
412 if (sattr->index != 1) {
413 data->temp[HYSTERSIS][sattr->index] &= 0xF0;
414 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
416 data->temp[HYSTERSIS][sattr->index] &= 0x0F;
417 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
420 out = data->temp[HYSTERSIS][sattr->index];
424 data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
426 /* We maintain an extra 2 digits of precision for simplicity
427 * - shift those back off before writing the value */
428 out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
433 reg = TEMP_MIN_REG(sattr->index);
436 reg = TEMP_MAX_REG(sattr->index);
439 reg = TEMP_OFFSET_REG(sattr->index);
442 reg = TEMP_TMIN_REG(sattr->index);
445 reg = TEMP_THERM_REG(sattr->index);
448 if (sattr->index != 2)
449 reg = REG_REMOTE1_HYSTERSIS;
451 reg = REG_REMOTE2_HYSTERSIS;
456 i2c_smbus_write_byte_data(client, reg, out);
458 mutex_unlock(&data->lock);
462 /* Table of autorange values - the user will write the value in millidegrees,
463 and we'll convert it */
464 static const int autorange_table[] = {
465 2000, 2500, 3330, 4000, 5000, 6670, 8000,
466 10000, 13330, 16000, 20000, 26670, 32000, 40000,
470 static ssize_t show_point2(struct device *dev, struct device_attribute *attr,
473 struct adt7475_data *data = adt7475_update_device(dev);
474 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
477 mutex_lock(&data->lock);
478 out = (data->range[sattr->index] >> 4) & 0x0F;
479 val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
480 mutex_unlock(&data->lock);
482 return sprintf(buf, "%d\n", val + autorange_table[out]);
485 static ssize_t set_point2(struct device *dev, struct device_attribute *attr,
486 const char *buf, size_t count)
488 struct i2c_client *client = to_i2c_client(dev);
489 struct adt7475_data *data = i2c_get_clientdata(client);
490 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
494 if (strict_strtol(buf, 10, &val))
497 mutex_lock(&data->lock);
499 /* Get a fresh copy of the needed registers */
500 data->config5 = adt7475_read(REG_CONFIG5);
501 data->temp[AUTOMIN][sattr->index] =
502 adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
503 data->range[sattr->index] =
504 adt7475_read(TEMP_TRANGE_REG(sattr->index));
506 /* The user will write an absolute value, so subtract the start point
507 to figure the range */
508 temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
509 val = SENSORS_LIMIT(val, temp + autorange_table[0],
510 temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
513 /* Find the nearest table entry to what the user wrote */
514 val = find_nearest(val, autorange_table, ARRAY_SIZE(autorange_table));
516 data->range[sattr->index] &= ~0xF0;
517 data->range[sattr->index] |= val << 4;
519 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
520 data->range[sattr->index]);
522 mutex_unlock(&data->lock);
526 static ssize_t show_tach(struct device *dev, struct device_attribute *attr,
529 struct adt7475_data *data = adt7475_update_device(dev);
530 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
533 if (sattr->nr == ALARM)
534 out = (data->alarms >> (sattr->index + 10)) & 1;
536 out = tach2rpm(data->tach[sattr->nr][sattr->index]);
538 return sprintf(buf, "%d\n", out);
541 static ssize_t set_tach(struct device *dev, struct device_attribute *attr,
542 const char *buf, size_t count)
545 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
546 struct i2c_client *client = to_i2c_client(dev);
547 struct adt7475_data *data = i2c_get_clientdata(client);
550 if (strict_strtoul(buf, 10, &val))
553 mutex_lock(&data->lock);
555 data->tach[MIN][sattr->index] = rpm2tach(val);
557 adt7475_write_word(client, TACH_MIN_REG(sattr->index),
558 data->tach[MIN][sattr->index]);
560 mutex_unlock(&data->lock);
564 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
567 struct adt7475_data *data = adt7475_update_device(dev);
568 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
570 return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
573 static ssize_t show_pwmchan(struct device *dev, struct device_attribute *attr,
576 struct adt7475_data *data = adt7475_update_device(dev);
577 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
579 return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
582 static ssize_t show_pwmctrl(struct device *dev, struct device_attribute *attr,
585 struct adt7475_data *data = adt7475_update_device(dev);
586 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
588 return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
591 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
592 const char *buf, size_t count)
595 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
596 struct i2c_client *client = to_i2c_client(dev);
597 struct adt7475_data *data = i2c_get_clientdata(client);
598 unsigned char reg = 0;
601 if (strict_strtol(buf, 10, &val))
604 mutex_lock(&data->lock);
608 /* Get a fresh value for CONTROL */
609 data->pwm[CONTROL][sattr->index] =
610 adt7475_read(PWM_CONFIG_REG(sattr->index));
612 /* If we are not in manual mode, then we shouldn't allow
613 * the user to set the pwm speed */
614 if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
615 mutex_unlock(&data->lock);
619 reg = PWM_REG(sattr->index);
623 reg = PWM_MIN_REG(sattr->index);
627 reg = PWM_MAX_REG(sattr->index);
631 data->pwm[sattr->nr][sattr->index] = SENSORS_LIMIT(val, 0, 0xFF);
632 i2c_smbus_write_byte_data(client, reg,
633 data->pwm[sattr->nr][sattr->index]);
635 mutex_unlock(&data->lock);
640 /* Called by set_pwmctrl and set_pwmchan */
642 static int hw_set_pwm(struct i2c_client *client, int index,
643 unsigned int pwmctl, unsigned int pwmchan)
645 struct adt7475_data *data = i2c_get_clientdata(client);
650 val = 0x03; /* Run at full speed */
653 val = 0x07; /* Manual mode */
658 /* Remote1 controls PWM */
662 /* local controls PWM */
666 /* remote2 controls PWM */
670 /* local/remote2 control PWM */
674 /* All three control PWM */
685 data->pwmctl[index] = pwmctl;
686 data->pwmchan[index] = pwmchan;
688 data->pwm[CONTROL][index] &= ~0xE0;
689 data->pwm[CONTROL][index] |= (val & 7) << 5;
691 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
692 data->pwm[CONTROL][index]);
697 static ssize_t set_pwmchan(struct device *dev, struct device_attribute *attr,
698 const char *buf, size_t count)
700 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
701 struct i2c_client *client = to_i2c_client(dev);
702 struct adt7475_data *data = i2c_get_clientdata(client);
706 if (strict_strtol(buf, 10, &val))
709 mutex_lock(&data->lock);
710 /* Read Modify Write PWM values */
711 adt7475_read_pwm(client, sattr->index);
712 r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
715 mutex_unlock(&data->lock);
720 static ssize_t set_pwmctrl(struct device *dev, struct device_attribute *attr,
721 const char *buf, size_t count)
723 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
724 struct i2c_client *client = to_i2c_client(dev);
725 struct adt7475_data *data = i2c_get_clientdata(client);
729 if (strict_strtol(buf, 10, &val))
732 mutex_lock(&data->lock);
733 /* Read Modify Write PWM values */
734 adt7475_read_pwm(client, sattr->index);
735 r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
738 mutex_unlock(&data->lock);
743 /* List of frequencies for the PWM */
744 static const int pwmfreq_table[] = {
745 11, 14, 22, 29, 35, 44, 58, 88
748 static ssize_t show_pwmfreq(struct device *dev, struct device_attribute *attr,
751 struct adt7475_data *data = adt7475_update_device(dev);
752 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
754 return sprintf(buf, "%d\n",
755 pwmfreq_table[data->range[sattr->index] & 7]);
758 static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr,
759 const char *buf, size_t count)
761 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
762 struct i2c_client *client = to_i2c_client(dev);
763 struct adt7475_data *data = i2c_get_clientdata(client);
767 if (strict_strtol(buf, 10, &val))
770 out = find_nearest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
772 mutex_lock(&data->lock);
774 data->range[sattr->index] =
775 adt7475_read(TEMP_TRANGE_REG(sattr->index));
776 data->range[sattr->index] &= ~7;
777 data->range[sattr->index] |= out;
779 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
780 data->range[sattr->index]);
782 mutex_unlock(&data->lock);
786 static ssize_t show_pwm_at_crit(struct device *dev,
787 struct device_attribute *devattr, char *buf)
789 struct adt7475_data *data = adt7475_update_device(dev);
790 return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
793 static ssize_t set_pwm_at_crit(struct device *dev,
794 struct device_attribute *devattr,
795 const char *buf, size_t count)
797 struct i2c_client *client = to_i2c_client(dev);
798 struct adt7475_data *data = i2c_get_clientdata(client);
801 if (strict_strtol(buf, 10, &val))
803 if (val != 0 && val != 1)
806 mutex_lock(&data->lock);
807 data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
809 data->config4 |= CONFIG4_MAXDUTY;
811 data->config4 &= ~CONFIG4_MAXDUTY;
812 i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
813 mutex_unlock(&data->lock);
818 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 0);
819 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage,
820 set_voltage, MAX, 0);
821 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
822 set_voltage, MIN, 0);
823 static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 0);
824 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
825 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
826 set_voltage, MAX, 1);
827 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
828 set_voltage, MIN, 1);
829 static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
830 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0);
831 static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0);
832 static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0);
833 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
835 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
837 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
838 set_temp, OFFSET, 0);
839 static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
840 show_temp, set_temp, AUTOMIN, 0);
841 static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IRUGO | S_IWUSR,
842 show_point2, set_point2, 0, 0);
843 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
845 static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
846 set_temp, HYSTERSIS, 0);
847 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1);
848 static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1);
849 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
851 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
853 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
854 set_temp, OFFSET, 1);
855 static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IRUGO | S_IWUSR,
856 show_temp, set_temp, AUTOMIN, 1);
857 static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IRUGO | S_IWUSR,
858 show_point2, set_point2, 0, 1);
859 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
861 static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
862 set_temp, HYSTERSIS, 1);
863 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2);
864 static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2);
865 static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2);
866 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
868 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
870 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
871 set_temp, OFFSET, 2);
872 static SENSOR_DEVICE_ATTR_2(temp3_auto_point1_temp, S_IRUGO | S_IWUSR,
873 show_temp, set_temp, AUTOMIN, 2);
874 static SENSOR_DEVICE_ATTR_2(temp3_auto_point2_temp, S_IRUGO | S_IWUSR,
875 show_point2, set_point2, 0, 2);
876 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
878 static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
879 set_temp, HYSTERSIS, 2);
880 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0);
881 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
883 static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_tach, NULL, ALARM, 0);
884 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_tach, NULL, INPUT, 1);
885 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
887 static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_tach, NULL, ALARM, 1);
888 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_tach, NULL, INPUT, 2);
889 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
891 static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_tach, NULL, ALARM, 2);
892 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_tach, NULL, INPUT, 3);
893 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
895 static SENSOR_DEVICE_ATTR_2(fan4_alarm, S_IRUGO, show_tach, NULL, ALARM, 3);
896 static SENSOR_DEVICE_ATTR_2(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
898 static SENSOR_DEVICE_ATTR_2(pwm1_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
899 set_pwmfreq, INPUT, 0);
900 static SENSOR_DEVICE_ATTR_2(pwm1_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
901 set_pwmctrl, INPUT, 0);
902 static SENSOR_DEVICE_ATTR_2(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
903 show_pwmchan, set_pwmchan, INPUT, 0);
904 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
906 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
908 static SENSOR_DEVICE_ATTR_2(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
910 static SENSOR_DEVICE_ATTR_2(pwm2_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
911 set_pwmfreq, INPUT, 1);
912 static SENSOR_DEVICE_ATTR_2(pwm2_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
913 set_pwmctrl, INPUT, 1);
914 static SENSOR_DEVICE_ATTR_2(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
915 show_pwmchan, set_pwmchan, INPUT, 1);
916 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
918 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
920 static SENSOR_DEVICE_ATTR_2(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
922 static SENSOR_DEVICE_ATTR_2(pwm3_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
923 set_pwmfreq, INPUT, 2);
924 static SENSOR_DEVICE_ATTR_2(pwm3_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
925 set_pwmctrl, INPUT, 2);
926 static SENSOR_DEVICE_ATTR_2(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
927 show_pwmchan, set_pwmchan, INPUT, 2);
928 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
930 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
933 /* Non-standard name, might need revisiting */
934 static DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
935 show_pwm_at_crit, set_pwm_at_crit);
937 static struct attribute *adt7475_attrs[] = {
938 &sensor_dev_attr_in1_input.dev_attr.attr,
939 &sensor_dev_attr_in1_max.dev_attr.attr,
940 &sensor_dev_attr_in1_min.dev_attr.attr,
941 &sensor_dev_attr_in1_alarm.dev_attr.attr,
942 &sensor_dev_attr_in2_input.dev_attr.attr,
943 &sensor_dev_attr_in2_max.dev_attr.attr,
944 &sensor_dev_attr_in2_min.dev_attr.attr,
945 &sensor_dev_attr_in2_alarm.dev_attr.attr,
946 &sensor_dev_attr_temp1_input.dev_attr.attr,
947 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
948 &sensor_dev_attr_temp1_fault.dev_attr.attr,
949 &sensor_dev_attr_temp1_max.dev_attr.attr,
950 &sensor_dev_attr_temp1_min.dev_attr.attr,
951 &sensor_dev_attr_temp1_offset.dev_attr.attr,
952 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
953 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
954 &sensor_dev_attr_temp1_crit.dev_attr.attr,
955 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
956 &sensor_dev_attr_temp2_input.dev_attr.attr,
957 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
958 &sensor_dev_attr_temp2_max.dev_attr.attr,
959 &sensor_dev_attr_temp2_min.dev_attr.attr,
960 &sensor_dev_attr_temp2_offset.dev_attr.attr,
961 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
962 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
963 &sensor_dev_attr_temp2_crit.dev_attr.attr,
964 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
965 &sensor_dev_attr_temp3_input.dev_attr.attr,
966 &sensor_dev_attr_temp3_fault.dev_attr.attr,
967 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
968 &sensor_dev_attr_temp3_max.dev_attr.attr,
969 &sensor_dev_attr_temp3_min.dev_attr.attr,
970 &sensor_dev_attr_temp3_offset.dev_attr.attr,
971 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
972 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
973 &sensor_dev_attr_temp3_crit.dev_attr.attr,
974 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
975 &sensor_dev_attr_fan1_input.dev_attr.attr,
976 &sensor_dev_attr_fan1_min.dev_attr.attr,
977 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
978 &sensor_dev_attr_fan2_input.dev_attr.attr,
979 &sensor_dev_attr_fan2_min.dev_attr.attr,
980 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
981 &sensor_dev_attr_fan3_input.dev_attr.attr,
982 &sensor_dev_attr_fan3_min.dev_attr.attr,
983 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
984 &sensor_dev_attr_fan4_input.dev_attr.attr,
985 &sensor_dev_attr_fan4_min.dev_attr.attr,
986 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
987 &sensor_dev_attr_pwm1.dev_attr.attr,
988 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
989 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
990 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
991 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
992 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
993 &sensor_dev_attr_pwm2.dev_attr.attr,
994 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
995 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
996 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
997 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
998 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
999 &sensor_dev_attr_pwm3.dev_attr.attr,
1000 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1001 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1002 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1003 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1004 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1005 &dev_attr_pwm_use_point2_pwm_at_crit.attr,
1009 struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1011 static int adt7475_detect(struct i2c_client *client, int kind,
1012 struct i2c_board_info *info)
1014 struct i2c_adapter *adapter = client->adapter;
1018 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1021 vendid = adt7475_read(REG_VENDID);
1022 devid = adt7475_read(REG_DEVID);
1024 if (vendid == 0x41 && devid == 0x73)
1026 else if (vendid == 0x41 && devid == 0x75 && client->addr == 0x2e)
1029 dev_dbg(&adapter->dev,
1030 "Couldn't detect an ADT7473 or ADT7475 part at "
1031 "0x%02x\n", (unsigned int)client->addr);
1035 strlcpy(info->type, name, I2C_NAME_SIZE);
1040 static int adt7475_probe(struct i2c_client *client,
1041 const struct i2c_device_id *id)
1043 struct adt7475_data *data;
1046 data = kzalloc(sizeof(*data), GFP_KERNEL);
1050 mutex_init(&data->lock);
1051 i2c_set_clientdata(client, data);
1053 /* Call adt7475_read_pwm for all pwm's as this will reprogram any
1054 pwm's which are disabled to manual mode with 0% duty cycle */
1055 for (i = 0; i < ADT7475_PWM_COUNT; i++)
1056 adt7475_read_pwm(client, i);
1058 ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
1062 data->hwmon_dev = hwmon_device_register(&client->dev);
1063 if (IS_ERR(data->hwmon_dev)) {
1064 ret = PTR_ERR(data->hwmon_dev);
1071 sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
1077 static int adt7475_remove(struct i2c_client *client)
1079 struct adt7475_data *data = i2c_get_clientdata(client);
1081 hwmon_device_unregister(data->hwmon_dev);
1082 sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
1088 static struct i2c_driver adt7475_driver = {
1089 .class = I2C_CLASS_HWMON,
1093 .probe = adt7475_probe,
1094 .remove = adt7475_remove,
1095 .id_table = adt7475_id,
1096 .detect = adt7475_detect,
1097 .address_data = &addr_data,
1100 static void adt7475_read_hystersis(struct i2c_client *client)
1102 struct adt7475_data *data = i2c_get_clientdata(client);
1104 data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1105 data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1106 data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1109 static void adt7475_read_pwm(struct i2c_client *client, int index)
1111 struct adt7475_data *data = i2c_get_clientdata(client);
1114 data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1116 /* Figure out the internal value for pwmctrl and pwmchan
1117 based on the current settings */
1118 v = (data->pwm[CONTROL][index] >> 5) & 7;
1121 data->pwmctl[index] = 0;
1123 data->pwmctl[index] = 1;
1125 /* The fan is disabled - we don't want to
1126 support that, so change to manual mode and
1127 set the duty cycle to 0 instead
1129 data->pwm[INPUT][index] = 0;
1130 data->pwm[CONTROL][index] &= ~0xE0;
1131 data->pwm[CONTROL][index] |= (7 << 5);
1133 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1134 data->pwm[INPUT][index]);
1136 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1137 data->pwm[CONTROL][index]);
1139 data->pwmctl[index] = 1;
1141 data->pwmctl[index] = 2;
1145 data->pwmchan[index] = 1;
1148 data->pwmchan[index] = 2;
1151 data->pwmchan[index] = 4;
1154 data->pwmchan[index] = 6;
1157 data->pwmchan[index] = 7;
1163 static struct adt7475_data *adt7475_update_device(struct device *dev)
1165 struct i2c_client *client = to_i2c_client(dev);
1166 struct adt7475_data *data = i2c_get_clientdata(client);
1170 mutex_lock(&data->lock);
1172 /* Measurement values update every 2 seconds */
1173 if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1175 data->alarms = adt7475_read(REG_STATUS2) << 8;
1176 data->alarms |= adt7475_read(REG_STATUS1);
1178 ext = adt7475_read(REG_EXTEND1);
1179 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++)
1180 data->voltage[INPUT][i] =
1181 (adt7475_read(VOLTAGE_REG(i)) << 2) |
1182 ((ext >> ((i + 1) * 2)) & 3);
1184 ext = adt7475_read(REG_EXTEND2);
1185 for (i = 0; i < ADT7475_TEMP_COUNT; i++)
1186 data->temp[INPUT][i] =
1187 (adt7475_read(TEMP_REG(i)) << 2) |
1188 ((ext >> ((i + 1) * 2)) & 3);
1190 for (i = 0; i < ADT7475_TACH_COUNT; i++)
1191 data->tach[INPUT][i] =
1192 adt7475_read_word(client, TACH_REG(i));
1194 /* Updated by hw when in auto mode */
1195 for (i = 0; i < ADT7475_PWM_COUNT; i++)
1196 data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
1198 data->measure_updated = jiffies;
1201 /* Limits and settings, should never change update every 60 seconds */
1202 if (time_after(jiffies, data->limits_updated + HZ * 60) ||
1204 data->config4 = adt7475_read(REG_CONFIG4);
1205 data->config5 = adt7475_read(REG_CONFIG5);
1207 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1208 /* Adjust values so they match the input precision */
1209 data->voltage[MIN][i] =
1210 adt7475_read(VOLTAGE_MIN_REG(i)) << 2;
1211 data->voltage[MAX][i] =
1212 adt7475_read(VOLTAGE_MAX_REG(i)) << 2;
1215 for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1216 /* Adjust values so they match the input precision */
1217 data->temp[MIN][i] =
1218 adt7475_read(TEMP_MIN_REG(i)) << 2;
1219 data->temp[MAX][i] =
1220 adt7475_read(TEMP_MAX_REG(i)) << 2;
1221 data->temp[AUTOMIN][i] =
1222 adt7475_read(TEMP_TMIN_REG(i)) << 2;
1223 data->temp[THERM][i] =
1224 adt7475_read(TEMP_THERM_REG(i)) << 2;
1225 data->temp[OFFSET][i] =
1226 adt7475_read(TEMP_OFFSET_REG(i));
1228 adt7475_read_hystersis(client);
1230 for (i = 0; i < ADT7475_TACH_COUNT; i++)
1231 data->tach[MIN][i] =
1232 adt7475_read_word(client, TACH_MIN_REG(i));
1234 for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1235 data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i));
1236 data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i));
1237 /* Set the channel and control information */
1238 adt7475_read_pwm(client, i);
1241 data->range[0] = adt7475_read(TEMP_TRANGE_REG(0));
1242 data->range[1] = adt7475_read(TEMP_TRANGE_REG(1));
1243 data->range[2] = adt7475_read(TEMP_TRANGE_REG(2));
1245 data->limits_updated = jiffies;
1249 mutex_unlock(&data->lock);
1254 static int __init sensors_adt7475_init(void)
1256 return i2c_add_driver(&adt7475_driver);
1259 static void __exit sensors_adt7475_exit(void)
1261 i2c_del_driver(&adt7475_driver);
1264 MODULE_AUTHOR("Advanced Micro Devices, Inc");
1265 MODULE_DESCRIPTION("adt7475 driver");
1266 MODULE_LICENSE("GPL");
1268 module_init(sensors_adt7475_init);
1269 module_exit(sensors_adt7475_exit);