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 0x20
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 0x44
55 #define REG_VOLTAGE_MAX_BASE 0x45
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 5 /* Not counting Vtt */
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;
151 static struct i2c_driver adt7475_driver;
152 static struct adt7475_data *adt7475_update_device(struct device *dev);
153 static void adt7475_read_hystersis(struct i2c_client *client);
154 static void adt7475_read_pwm(struct i2c_client *client, int index);
156 /* Given a temp value, convert it to register value */
158 static inline u16 temp2reg(struct adt7475_data *data, long val)
162 if (!(data->config5 & CONFIG5_TWOSCOMP)) {
163 val = SENSORS_LIMIT(val, -64000, 191000);
164 ret = (val + 64500) / 1000;
166 val = SENSORS_LIMIT(val, -128000, 127000);
168 ret = (256500 + val) / 1000;
170 ret = (val + 500) / 1000;
176 /* Given a register value, convert it to a real temp value */
178 static inline int reg2temp(struct adt7475_data *data, u16 reg)
180 if (data->config5 & CONFIG5_TWOSCOMP) {
182 return (reg - 1024) * 250;
186 return (reg - 256) * 250;
189 static inline int tach2rpm(u16 tach)
191 if (tach == 0 || tach == 0xFFFF)
194 return (90000 * 60) / tach;
197 static inline u16 rpm2tach(unsigned long rpm)
202 return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF);
205 /* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
206 static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
207 { 45, 94 }, /* +2.5V */
208 { 175, 525 }, /* Vccp */
209 { 68, 71 }, /* Vcc */
210 { 93, 47 }, /* +5V */
211 { 120, 20 }, /* +12V */
212 { 45, 45 }, /* Vtt */
215 static inline int reg2volt(int channel, u16 reg)
217 const int *r = adt7473_in_scaling[channel];
219 return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
222 static inline u16 volt2reg(int channel, long volt)
224 const int *r = adt7473_in_scaling[channel];
227 reg = (volt * r[1] * 1024) / ((r[0] + r[1]) * 2250);
228 return SENSORS_LIMIT(reg, 0, 1023) & (0xff << 2);
231 static u16 adt7475_read_word(struct i2c_client *client, int reg)
235 val = i2c_smbus_read_byte_data(client, reg);
236 val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8);
241 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
243 i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
244 i2c_smbus_write_byte_data(client, reg, val & 0xFF);
247 /* Find the nearest value in a table - used for pwm frequency and
249 static int find_nearest(long val, const int *array, int size)
256 if (val > array[size - 1])
259 for (i = 0; i < size - 1; i++) {
262 if (val > array[i + 1])
266 b = array[i + 1] - val;
268 return (a <= b) ? i : i + 1;
274 static ssize_t show_voltage(struct device *dev, struct device_attribute *attr,
277 struct adt7475_data *data = adt7475_update_device(dev);
278 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
283 return sprintf(buf, "%d\n",
284 (data->alarms >> sattr->index) & 1);
286 val = data->voltage[sattr->nr][sattr->index];
287 return sprintf(buf, "%d\n", reg2volt(sattr->index, val));
291 static ssize_t set_voltage(struct device *dev, struct device_attribute *attr,
292 const char *buf, size_t count)
295 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
296 struct i2c_client *client = to_i2c_client(dev);
297 struct adt7475_data *data = i2c_get_clientdata(client);
301 if (strict_strtol(buf, 10, &val))
304 mutex_lock(&data->lock);
306 data->voltage[sattr->nr][sattr->index] = volt2reg(sattr->index, val);
308 if (sattr->nr == MIN)
309 reg = VOLTAGE_MIN_REG(sattr->index);
311 reg = VOLTAGE_MAX_REG(sattr->index);
313 i2c_smbus_write_byte_data(client, reg,
314 data->voltage[sattr->nr][sattr->index] >> 2);
315 mutex_unlock(&data->lock);
320 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
323 struct adt7475_data *data = adt7475_update_device(dev);
324 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
329 mutex_lock(&data->lock);
330 out = data->temp[sattr->nr][sattr->index];
331 if (sattr->index != 1)
332 out = (out >> 4) & 0xF;
335 /* Show the value as an absolute number tied to
337 out = reg2temp(data, data->temp[THERM][sattr->index]) -
339 mutex_unlock(&data->lock);
343 /* Offset is always 2's complement, regardless of the
344 * setting in CONFIG5 */
345 mutex_lock(&data->lock);
346 out = (s8)data->temp[sattr->nr][sattr->index];
347 if (data->config5 & CONFIG5_TEMPOFFSET)
351 mutex_unlock(&data->lock);
355 out = (data->alarms >> (sattr->index + 4)) & 1;
359 /* Note - only for remote1 and remote2 */
360 out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
364 /* All other temp values are in the configured format */
365 out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
368 return sprintf(buf, "%d\n", out);
371 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
372 const char *buf, size_t count)
374 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
375 struct i2c_client *client = to_i2c_client(dev);
376 struct adt7475_data *data = i2c_get_clientdata(client);
377 unsigned char reg = 0;
382 if (strict_strtol(buf, 10, &val))
385 mutex_lock(&data->lock);
387 /* We need the config register in all cases for temp <-> reg conv. */
388 data->config5 = adt7475_read(REG_CONFIG5);
392 if (data->config5 & CONFIG5_TEMPOFFSET) {
393 val = SENSORS_LIMIT(val, -63000, 127000);
394 out = data->temp[OFFSET][sattr->index] = val / 1000;
396 val = SENSORS_LIMIT(val, -63000, 64000);
397 out = data->temp[OFFSET][sattr->index] = val / 500;
402 /* The value will be given as an absolute value, turn it
403 into an offset based on THERM */
405 /* Read fresh THERM and HYSTERSIS values from the chip */
406 data->temp[THERM][sattr->index] =
407 adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
408 adt7475_read_hystersis(client);
410 temp = reg2temp(data, data->temp[THERM][sattr->index]);
411 val = SENSORS_LIMIT(val, temp - 15000, temp);
412 val = (temp - val) / 1000;
414 if (sattr->index != 1) {
415 data->temp[HYSTERSIS][sattr->index] &= 0xF0;
416 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
418 data->temp[HYSTERSIS][sattr->index] &= 0x0F;
419 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
422 out = data->temp[HYSTERSIS][sattr->index];
426 data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
428 /* We maintain an extra 2 digits of precision for simplicity
429 * - shift those back off before writing the value */
430 out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
435 reg = TEMP_MIN_REG(sattr->index);
438 reg = TEMP_MAX_REG(sattr->index);
441 reg = TEMP_OFFSET_REG(sattr->index);
444 reg = TEMP_TMIN_REG(sattr->index);
447 reg = TEMP_THERM_REG(sattr->index);
450 if (sattr->index != 2)
451 reg = REG_REMOTE1_HYSTERSIS;
453 reg = REG_REMOTE2_HYSTERSIS;
458 i2c_smbus_write_byte_data(client, reg, out);
460 mutex_unlock(&data->lock);
464 /* Table of autorange values - the user will write the value in millidegrees,
465 and we'll convert it */
466 static const int autorange_table[] = {
467 2000, 2500, 3330, 4000, 5000, 6670, 8000,
468 10000, 13330, 16000, 20000, 26670, 32000, 40000,
472 static ssize_t show_point2(struct device *dev, struct device_attribute *attr,
475 struct adt7475_data *data = adt7475_update_device(dev);
476 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
479 mutex_lock(&data->lock);
480 out = (data->range[sattr->index] >> 4) & 0x0F;
481 val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
482 mutex_unlock(&data->lock);
484 return sprintf(buf, "%d\n", val + autorange_table[out]);
487 static ssize_t set_point2(struct device *dev, struct device_attribute *attr,
488 const char *buf, size_t count)
490 struct i2c_client *client = to_i2c_client(dev);
491 struct adt7475_data *data = i2c_get_clientdata(client);
492 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
496 if (strict_strtol(buf, 10, &val))
499 mutex_lock(&data->lock);
501 /* Get a fresh copy of the needed registers */
502 data->config5 = adt7475_read(REG_CONFIG5);
503 data->temp[AUTOMIN][sattr->index] =
504 adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
505 data->range[sattr->index] =
506 adt7475_read(TEMP_TRANGE_REG(sattr->index));
508 /* The user will write an absolute value, so subtract the start point
509 to figure the range */
510 temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
511 val = SENSORS_LIMIT(val, temp + autorange_table[0],
512 temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
515 /* Find the nearest table entry to what the user wrote */
516 val = find_nearest(val, autorange_table, ARRAY_SIZE(autorange_table));
518 data->range[sattr->index] &= ~0xF0;
519 data->range[sattr->index] |= val << 4;
521 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
522 data->range[sattr->index]);
524 mutex_unlock(&data->lock);
528 static ssize_t show_tach(struct device *dev, struct device_attribute *attr,
531 struct adt7475_data *data = adt7475_update_device(dev);
532 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
535 if (sattr->nr == ALARM)
536 out = (data->alarms >> (sattr->index + 10)) & 1;
538 out = tach2rpm(data->tach[sattr->nr][sattr->index]);
540 return sprintf(buf, "%d\n", out);
543 static ssize_t set_tach(struct device *dev, struct device_attribute *attr,
544 const char *buf, size_t count)
547 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
548 struct i2c_client *client = to_i2c_client(dev);
549 struct adt7475_data *data = i2c_get_clientdata(client);
552 if (strict_strtoul(buf, 10, &val))
555 mutex_lock(&data->lock);
557 data->tach[MIN][sattr->index] = rpm2tach(val);
559 adt7475_write_word(client, TACH_MIN_REG(sattr->index),
560 data->tach[MIN][sattr->index]);
562 mutex_unlock(&data->lock);
566 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
569 struct adt7475_data *data = adt7475_update_device(dev);
570 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
572 return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
575 static ssize_t show_pwmchan(struct device *dev, struct device_attribute *attr,
578 struct adt7475_data *data = adt7475_update_device(dev);
579 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
581 return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
584 static ssize_t show_pwmctrl(struct device *dev, struct device_attribute *attr,
587 struct adt7475_data *data = adt7475_update_device(dev);
588 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
590 return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
593 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
594 const char *buf, size_t count)
597 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
598 struct i2c_client *client = to_i2c_client(dev);
599 struct adt7475_data *data = i2c_get_clientdata(client);
600 unsigned char reg = 0;
603 if (strict_strtol(buf, 10, &val))
606 mutex_lock(&data->lock);
610 /* Get a fresh value for CONTROL */
611 data->pwm[CONTROL][sattr->index] =
612 adt7475_read(PWM_CONFIG_REG(sattr->index));
614 /* If we are not in manual mode, then we shouldn't allow
615 * the user to set the pwm speed */
616 if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
617 mutex_unlock(&data->lock);
621 reg = PWM_REG(sattr->index);
625 reg = PWM_MIN_REG(sattr->index);
629 reg = PWM_MAX_REG(sattr->index);
633 data->pwm[sattr->nr][sattr->index] = SENSORS_LIMIT(val, 0, 0xFF);
634 i2c_smbus_write_byte_data(client, reg,
635 data->pwm[sattr->nr][sattr->index]);
637 mutex_unlock(&data->lock);
642 /* Called by set_pwmctrl and set_pwmchan */
644 static int hw_set_pwm(struct i2c_client *client, int index,
645 unsigned int pwmctl, unsigned int pwmchan)
647 struct adt7475_data *data = i2c_get_clientdata(client);
652 val = 0x03; /* Run at full speed */
655 val = 0x07; /* Manual mode */
660 /* Remote1 controls PWM */
664 /* local controls PWM */
668 /* remote2 controls PWM */
672 /* local/remote2 control PWM */
676 /* All three control PWM */
687 data->pwmctl[index] = pwmctl;
688 data->pwmchan[index] = pwmchan;
690 data->pwm[CONTROL][index] &= ~0xE0;
691 data->pwm[CONTROL][index] |= (val & 7) << 5;
693 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
694 data->pwm[CONTROL][index]);
699 static ssize_t set_pwmchan(struct device *dev, struct device_attribute *attr,
700 const char *buf, size_t count)
702 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
703 struct i2c_client *client = to_i2c_client(dev);
704 struct adt7475_data *data = i2c_get_clientdata(client);
708 if (strict_strtol(buf, 10, &val))
711 mutex_lock(&data->lock);
712 /* Read Modify Write PWM values */
713 adt7475_read_pwm(client, sattr->index);
714 r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
717 mutex_unlock(&data->lock);
722 static ssize_t set_pwmctrl(struct device *dev, struct device_attribute *attr,
723 const char *buf, size_t count)
725 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
726 struct i2c_client *client = to_i2c_client(dev);
727 struct adt7475_data *data = i2c_get_clientdata(client);
731 if (strict_strtol(buf, 10, &val))
734 mutex_lock(&data->lock);
735 /* Read Modify Write PWM values */
736 adt7475_read_pwm(client, sattr->index);
737 r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
740 mutex_unlock(&data->lock);
745 /* List of frequencies for the PWM */
746 static const int pwmfreq_table[] = {
747 11, 14, 22, 29, 35, 44, 58, 88
750 static ssize_t show_pwmfreq(struct device *dev, struct device_attribute *attr,
753 struct adt7475_data *data = adt7475_update_device(dev);
754 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
756 return sprintf(buf, "%d\n",
757 pwmfreq_table[data->range[sattr->index] & 7]);
760 static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr,
761 const char *buf, size_t count)
763 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
764 struct i2c_client *client = to_i2c_client(dev);
765 struct adt7475_data *data = i2c_get_clientdata(client);
769 if (strict_strtol(buf, 10, &val))
772 out = find_nearest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
774 mutex_lock(&data->lock);
776 data->range[sattr->index] =
777 adt7475_read(TEMP_TRANGE_REG(sattr->index));
778 data->range[sattr->index] &= ~7;
779 data->range[sattr->index] |= out;
781 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
782 data->range[sattr->index]);
784 mutex_unlock(&data->lock);
788 static ssize_t show_pwm_at_crit(struct device *dev,
789 struct device_attribute *devattr, char *buf)
791 struct adt7475_data *data = adt7475_update_device(dev);
792 return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
795 static ssize_t set_pwm_at_crit(struct device *dev,
796 struct device_attribute *devattr,
797 const char *buf, size_t count)
799 struct i2c_client *client = to_i2c_client(dev);
800 struct adt7475_data *data = i2c_get_clientdata(client);
803 if (strict_strtol(buf, 10, &val))
805 if (val != 0 && val != 1)
808 mutex_lock(&data->lock);
809 data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
811 data->config4 |= CONFIG4_MAXDUTY;
813 data->config4 &= ~CONFIG4_MAXDUTY;
814 i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
815 mutex_unlock(&data->lock);
820 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
821 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage,
822 set_voltage, MAX, 1);
823 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
824 set_voltage, MIN, 1);
825 static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
826 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 2);
827 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
828 set_voltage, MAX, 2);
829 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
830 set_voltage, MIN, 2);
831 static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 2);
832 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0);
833 static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0);
834 static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0);
835 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
837 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
839 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
840 set_temp, OFFSET, 0);
841 static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
842 show_temp, set_temp, AUTOMIN, 0);
843 static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IRUGO | S_IWUSR,
844 show_point2, set_point2, 0, 0);
845 static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
847 static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
848 set_temp, HYSTERSIS, 0);
849 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1);
850 static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1);
851 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
853 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
855 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
856 set_temp, OFFSET, 1);
857 static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IRUGO | S_IWUSR,
858 show_temp, set_temp, AUTOMIN, 1);
859 static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IRUGO | S_IWUSR,
860 show_point2, set_point2, 0, 1);
861 static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
863 static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
864 set_temp, HYSTERSIS, 1);
865 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2);
866 static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2);
867 static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2);
868 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
870 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
872 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
873 set_temp, OFFSET, 2);
874 static SENSOR_DEVICE_ATTR_2(temp3_auto_point1_temp, S_IRUGO | S_IWUSR,
875 show_temp, set_temp, AUTOMIN, 2);
876 static SENSOR_DEVICE_ATTR_2(temp3_auto_point2_temp, S_IRUGO | S_IWUSR,
877 show_point2, set_point2, 0, 2);
878 static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
880 static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
881 set_temp, HYSTERSIS, 2);
882 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0);
883 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
885 static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_tach, NULL, ALARM, 0);
886 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_tach, NULL, INPUT, 1);
887 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
889 static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_tach, NULL, ALARM, 1);
890 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_tach, NULL, INPUT, 2);
891 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
893 static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_tach, NULL, ALARM, 2);
894 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_tach, NULL, INPUT, 3);
895 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
897 static SENSOR_DEVICE_ATTR_2(fan4_alarm, S_IRUGO, show_tach, NULL, ALARM, 3);
898 static SENSOR_DEVICE_ATTR_2(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
900 static SENSOR_DEVICE_ATTR_2(pwm1_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
901 set_pwmfreq, INPUT, 0);
902 static SENSOR_DEVICE_ATTR_2(pwm1_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
903 set_pwmctrl, INPUT, 0);
904 static SENSOR_DEVICE_ATTR_2(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
905 show_pwmchan, set_pwmchan, INPUT, 0);
906 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
908 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
910 static SENSOR_DEVICE_ATTR_2(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
912 static SENSOR_DEVICE_ATTR_2(pwm2_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
913 set_pwmfreq, INPUT, 1);
914 static SENSOR_DEVICE_ATTR_2(pwm2_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
915 set_pwmctrl, INPUT, 1);
916 static SENSOR_DEVICE_ATTR_2(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
917 show_pwmchan, set_pwmchan, INPUT, 1);
918 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
920 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
922 static SENSOR_DEVICE_ATTR_2(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
924 static SENSOR_DEVICE_ATTR_2(pwm3_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
925 set_pwmfreq, INPUT, 2);
926 static SENSOR_DEVICE_ATTR_2(pwm3_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
927 set_pwmctrl, INPUT, 2);
928 static SENSOR_DEVICE_ATTR_2(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
929 show_pwmchan, set_pwmchan, INPUT, 2);
930 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
932 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
935 /* Non-standard name, might need revisiting */
936 static DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
937 show_pwm_at_crit, set_pwm_at_crit);
939 static struct attribute *adt7475_attrs[] = {
940 &sensor_dev_attr_in1_input.dev_attr.attr,
941 &sensor_dev_attr_in1_max.dev_attr.attr,
942 &sensor_dev_attr_in1_min.dev_attr.attr,
943 &sensor_dev_attr_in1_alarm.dev_attr.attr,
944 &sensor_dev_attr_in2_input.dev_attr.attr,
945 &sensor_dev_attr_in2_max.dev_attr.attr,
946 &sensor_dev_attr_in2_min.dev_attr.attr,
947 &sensor_dev_attr_in2_alarm.dev_attr.attr,
948 &sensor_dev_attr_temp1_input.dev_attr.attr,
949 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
950 &sensor_dev_attr_temp1_fault.dev_attr.attr,
951 &sensor_dev_attr_temp1_max.dev_attr.attr,
952 &sensor_dev_attr_temp1_min.dev_attr.attr,
953 &sensor_dev_attr_temp1_offset.dev_attr.attr,
954 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
955 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
956 &sensor_dev_attr_temp1_crit.dev_attr.attr,
957 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
958 &sensor_dev_attr_temp2_input.dev_attr.attr,
959 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
960 &sensor_dev_attr_temp2_max.dev_attr.attr,
961 &sensor_dev_attr_temp2_min.dev_attr.attr,
962 &sensor_dev_attr_temp2_offset.dev_attr.attr,
963 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
964 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
965 &sensor_dev_attr_temp2_crit.dev_attr.attr,
966 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
967 &sensor_dev_attr_temp3_input.dev_attr.attr,
968 &sensor_dev_attr_temp3_fault.dev_attr.attr,
969 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
970 &sensor_dev_attr_temp3_max.dev_attr.attr,
971 &sensor_dev_attr_temp3_min.dev_attr.attr,
972 &sensor_dev_attr_temp3_offset.dev_attr.attr,
973 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
974 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
975 &sensor_dev_attr_temp3_crit.dev_attr.attr,
976 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
977 &sensor_dev_attr_fan1_input.dev_attr.attr,
978 &sensor_dev_attr_fan1_min.dev_attr.attr,
979 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
980 &sensor_dev_attr_fan2_input.dev_attr.attr,
981 &sensor_dev_attr_fan2_min.dev_attr.attr,
982 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
983 &sensor_dev_attr_fan3_input.dev_attr.attr,
984 &sensor_dev_attr_fan3_min.dev_attr.attr,
985 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
986 &sensor_dev_attr_fan4_input.dev_attr.attr,
987 &sensor_dev_attr_fan4_min.dev_attr.attr,
988 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
989 &sensor_dev_attr_pwm1.dev_attr.attr,
990 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
991 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
992 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
993 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
994 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
995 &sensor_dev_attr_pwm2.dev_attr.attr,
996 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
997 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
998 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
999 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1000 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1001 &sensor_dev_attr_pwm3.dev_attr.attr,
1002 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1003 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1004 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1005 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1006 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1007 &dev_attr_pwm_use_point2_pwm_at_crit.attr,
1011 static struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1013 static int adt7475_detect(struct i2c_client *client, int kind,
1014 struct i2c_board_info *info)
1016 struct i2c_adapter *adapter = client->adapter;
1020 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1023 vendid = adt7475_read(REG_VENDID);
1024 devid = adt7475_read(REG_DEVID);
1026 if (vendid == 0x41 && devid == 0x73)
1028 else if (vendid == 0x41 && devid == 0x75 && client->addr == 0x2e)
1031 dev_dbg(&adapter->dev,
1032 "Couldn't detect an ADT7473 or ADT7475 part at "
1033 "0x%02x\n", (unsigned int)client->addr);
1037 strlcpy(info->type, name, I2C_NAME_SIZE);
1042 static int adt7475_probe(struct i2c_client *client,
1043 const struct i2c_device_id *id)
1045 struct adt7475_data *data;
1048 data = kzalloc(sizeof(*data), GFP_KERNEL);
1052 mutex_init(&data->lock);
1053 i2c_set_clientdata(client, data);
1055 /* Initialize device-specific values */
1056 switch (id->driver_data) {
1058 data->has_voltage = 0x06; /* in1, in2 */
1061 /* Call adt7475_read_pwm for all pwm's as this will reprogram any
1062 pwm's which are disabled to manual mode with 0% duty cycle */
1063 for (i = 0; i < ADT7475_PWM_COUNT; i++)
1064 adt7475_read_pwm(client, i);
1066 ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
1070 data->hwmon_dev = hwmon_device_register(&client->dev);
1071 if (IS_ERR(data->hwmon_dev)) {
1072 ret = PTR_ERR(data->hwmon_dev);
1079 sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
1085 static int adt7475_remove(struct i2c_client *client)
1087 struct adt7475_data *data = i2c_get_clientdata(client);
1089 hwmon_device_unregister(data->hwmon_dev);
1090 sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
1096 static struct i2c_driver adt7475_driver = {
1097 .class = I2C_CLASS_HWMON,
1101 .probe = adt7475_probe,
1102 .remove = adt7475_remove,
1103 .id_table = adt7475_id,
1104 .detect = adt7475_detect,
1105 .address_data = &addr_data,
1108 static void adt7475_read_hystersis(struct i2c_client *client)
1110 struct adt7475_data *data = i2c_get_clientdata(client);
1112 data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1113 data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1114 data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1117 static void adt7475_read_pwm(struct i2c_client *client, int index)
1119 struct adt7475_data *data = i2c_get_clientdata(client);
1122 data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1124 /* Figure out the internal value for pwmctrl and pwmchan
1125 based on the current settings */
1126 v = (data->pwm[CONTROL][index] >> 5) & 7;
1129 data->pwmctl[index] = 0;
1131 data->pwmctl[index] = 1;
1133 /* The fan is disabled - we don't want to
1134 support that, so change to manual mode and
1135 set the duty cycle to 0 instead
1137 data->pwm[INPUT][index] = 0;
1138 data->pwm[CONTROL][index] &= ~0xE0;
1139 data->pwm[CONTROL][index] |= (7 << 5);
1141 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1142 data->pwm[INPUT][index]);
1144 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1145 data->pwm[CONTROL][index]);
1147 data->pwmctl[index] = 1;
1149 data->pwmctl[index] = 2;
1153 data->pwmchan[index] = 1;
1156 data->pwmchan[index] = 2;
1159 data->pwmchan[index] = 4;
1162 data->pwmchan[index] = 6;
1165 data->pwmchan[index] = 7;
1171 static struct adt7475_data *adt7475_update_device(struct device *dev)
1173 struct i2c_client *client = to_i2c_client(dev);
1174 struct adt7475_data *data = i2c_get_clientdata(client);
1178 mutex_lock(&data->lock);
1180 /* Measurement values update every 2 seconds */
1181 if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1183 data->alarms = adt7475_read(REG_STATUS2) << 8;
1184 data->alarms |= adt7475_read(REG_STATUS1);
1186 ext = adt7475_read(REG_EXTEND1);
1187 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1188 if (!(data->has_voltage & (1 << i)))
1190 data->voltage[INPUT][i] =
1191 (adt7475_read(VOLTAGE_REG(i)) << 2) |
1192 ((ext >> (i * 2)) & 3);
1195 ext = adt7475_read(REG_EXTEND2);
1196 for (i = 0; i < ADT7475_TEMP_COUNT; i++)
1197 data->temp[INPUT][i] =
1198 (adt7475_read(TEMP_REG(i)) << 2) |
1199 ((ext >> ((i + 1) * 2)) & 3);
1201 for (i = 0; i < ADT7475_TACH_COUNT; i++)
1202 data->tach[INPUT][i] =
1203 adt7475_read_word(client, TACH_REG(i));
1205 /* Updated by hw when in auto mode */
1206 for (i = 0; i < ADT7475_PWM_COUNT; i++)
1207 data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
1209 data->measure_updated = jiffies;
1212 /* Limits and settings, should never change update every 60 seconds */
1213 if (time_after(jiffies, data->limits_updated + HZ * 60) ||
1215 data->config4 = adt7475_read(REG_CONFIG4);
1216 data->config5 = adt7475_read(REG_CONFIG5);
1218 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1219 if (!(data->has_voltage & (1 << i)))
1221 /* Adjust values so they match the input precision */
1222 data->voltage[MIN][i] =
1223 adt7475_read(VOLTAGE_MIN_REG(i)) << 2;
1224 data->voltage[MAX][i] =
1225 adt7475_read(VOLTAGE_MAX_REG(i)) << 2;
1228 for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1229 /* Adjust values so they match the input precision */
1230 data->temp[MIN][i] =
1231 adt7475_read(TEMP_MIN_REG(i)) << 2;
1232 data->temp[MAX][i] =
1233 adt7475_read(TEMP_MAX_REG(i)) << 2;
1234 data->temp[AUTOMIN][i] =
1235 adt7475_read(TEMP_TMIN_REG(i)) << 2;
1236 data->temp[THERM][i] =
1237 adt7475_read(TEMP_THERM_REG(i)) << 2;
1238 data->temp[OFFSET][i] =
1239 adt7475_read(TEMP_OFFSET_REG(i));
1241 adt7475_read_hystersis(client);
1243 for (i = 0; i < ADT7475_TACH_COUNT; i++)
1244 data->tach[MIN][i] =
1245 adt7475_read_word(client, TACH_MIN_REG(i));
1247 for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1248 data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i));
1249 data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i));
1250 /* Set the channel and control information */
1251 adt7475_read_pwm(client, i);
1254 data->range[0] = adt7475_read(TEMP_TRANGE_REG(0));
1255 data->range[1] = adt7475_read(TEMP_TRANGE_REG(1));
1256 data->range[2] = adt7475_read(TEMP_TRANGE_REG(2));
1258 data->limits_updated = jiffies;
1262 mutex_unlock(&data->lock);
1267 static int __init sensors_adt7475_init(void)
1269 return i2c_add_driver(&adt7475_driver);
1272 static void __exit sensors_adt7475_exit(void)
1274 i2c_del_driver(&adt7475_driver);
1277 MODULE_AUTHOR("Advanced Micro Devices, Inc");
1278 MODULE_DESCRIPTION("adt7475 driver");
1279 MODULE_LICENSE("GPL");
1281 module_init(sensors_adt7475_init);
1282 module_exit(sensors_adt7475_exit);