2 * A hwmon driver for the Analog Devices ADT7473
3 * Copyright (C) 2007 IBM
5 * Author: Darrick J. Wong <djwong@us.ibm.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/module.h>
23 #include <linux/jiffies.h>
24 #include <linux/i2c.h>
25 #include <linux/hwmon.h>
26 #include <linux/hwmon-sysfs.h>
27 #include <linux/err.h>
28 #include <linux/mutex.h>
29 #include <linux/delay.h>
30 #include <linux/log2.h>
32 /* Addresses to scan */
33 static const unsigned short normal_i2c[] = { 0x2C, 0x2D, 0x2E, I2C_CLIENT_END };
35 /* Insmod parameters */
36 I2C_CLIENT_INSMOD_1(adt7473);
38 /* ADT7473 registers */
39 #define ADT7473_REG_BASE_ADDR 0x20
41 #define ADT7473_REG_VOLT_BASE_ADDR 0x21
42 #define ADT7473_REG_VOLT_MIN_BASE_ADDR 0x46
44 #define ADT7473_REG_TEMP_BASE_ADDR 0x25
45 #define ADT7473_REG_TEMP_LIMITS_BASE_ADDR 0x4E
46 #define ADT7473_REG_TEMP_TMIN_BASE_ADDR 0x67
47 #define ADT7473_REG_TEMP_TMAX_BASE_ADDR 0x6A
49 #define ADT7473_REG_FAN_BASE_ADDR 0x28
50 #define ADT7473_REG_FAN_MIN_BASE_ADDR 0x54
52 #define ADT7473_REG_PWM_BASE_ADDR 0x30
53 #define ADT7473_REG_PWM_MIN_BASE_ADDR 0x64
54 #define ADT7473_REG_PWM_MAX_BASE_ADDR 0x38
55 #define ADT7473_REG_PWM_BHVR_BASE_ADDR 0x5C
56 #define ADT7473_PWM_BHVR_MASK 0xE0
57 #define ADT7473_PWM_BHVR_SHIFT 5
59 #define ADT7473_REG_CFG1 0x40
60 #define ADT7473_CFG1_START 0x01
61 #define ADT7473_CFG1_READY 0x04
62 #define ADT7473_REG_CFG2 0x73
63 #define ADT7473_REG_CFG3 0x78
64 #define ADT7473_REG_CFG4 0x7D
65 #define ADT7473_CFG4_MAX_DUTY_AT_OVT 0x08
66 #define ADT7473_REG_CFG5 0x7C
67 #define ADT7473_CFG5_TEMP_TWOS 0x01
68 #define ADT7473_CFG5_TEMP_OFFSET 0x02
70 #define ADT7473_REG_DEVICE 0x3D
71 #define ADT7473_VENDOR 0x41
72 #define ADT7473_REG_VENDOR 0x3E
73 #define ADT7473_DEVICE 0x73
74 #define ADT7473_REG_REVISION 0x3F
75 #define ADT7473_REV_68 0x68
76 #define ADT7473_REV_69 0x69
78 #define ADT7473_REG_ALARM1 0x41
79 #define ADT7473_VCCP_ALARM 0x02
80 #define ADT7473_VCC_ALARM 0x04
81 #define ADT7473_R1T_ALARM 0x10
82 #define ADT7473_LT_ALARM 0x20
83 #define ADT7473_R2T_ALARM 0x40
84 #define ADT7473_OOL 0x80
85 #define ADT7473_REG_ALARM2 0x42
86 #define ADT7473_OVT_ALARM 0x02
87 #define ADT7473_FAN1_ALARM 0x04
88 #define ADT7473_FAN2_ALARM 0x08
89 #define ADT7473_FAN3_ALARM 0x10
90 #define ADT7473_FAN4_ALARM 0x20
91 #define ADT7473_R1T_SHORT 0x40
92 #define ADT7473_R2T_SHORT 0x80
94 #define ALARM2(x) ((x) << 8)
96 #define ADT7473_VOLT_COUNT 2
97 #define ADT7473_REG_VOLT(x) (ADT7473_REG_VOLT_BASE_ADDR + (x))
98 #define ADT7473_REG_VOLT_MIN(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + ((x) * 2))
99 #define ADT7473_REG_VOLT_MAX(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + \
102 #define ADT7473_TEMP_COUNT 3
103 #define ADT7473_REG_TEMP(x) (ADT7473_REG_TEMP_BASE_ADDR + (x))
104 #define ADT7473_REG_TEMP_MIN(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
105 #define ADT7473_REG_TEMP_MAX(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + \
107 #define ADT7473_REG_TEMP_TMIN(x) (ADT7473_REG_TEMP_TMIN_BASE_ADDR + (x))
108 #define ADT7473_REG_TEMP_TMAX(x) (ADT7473_REG_TEMP_TMAX_BASE_ADDR + (x))
110 #define ADT7473_FAN_COUNT 4
111 #define ADT7473_REG_FAN(x) (ADT7473_REG_FAN_BASE_ADDR + ((x) * 2))
112 #define ADT7473_REG_FAN_MIN(x) (ADT7473_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
114 #define ADT7473_PWM_COUNT 3
115 #define ADT7473_REG_PWM(x) (ADT7473_REG_PWM_BASE_ADDR + (x))
116 #define ADT7473_REG_PWM_MAX(x) (ADT7473_REG_PWM_MAX_BASE_ADDR + (x))
117 #define ADT7473_REG_PWM_MIN(x) (ADT7473_REG_PWM_MIN_BASE_ADDR + (x))
118 #define ADT7473_REG_PWM_BHVR(x) (ADT7473_REG_PWM_BHVR_BASE_ADDR + (x))
120 /* How often do we reread sensors values? (In jiffies) */
121 #define SENSOR_REFRESH_INTERVAL (2 * HZ)
123 /* How often do we reread sensor limit values? (In jiffies) */
124 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
126 /* datasheet says to divide this number by the fan reading to get fan rpm */
127 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
128 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
129 #define FAN_PERIOD_INVALID 65535
130 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
132 struct adt7473_data {
133 struct device *hwmon_dev;
134 struct attribute_group attrs;
138 unsigned long sensors_last_updated; /* In jiffies */
139 unsigned long limits_last_updated; /* In jiffies */
141 u8 volt[ADT7473_VOLT_COUNT];
142 s8 volt_min[ADT7473_VOLT_COUNT];
143 s8 volt_max[ADT7473_VOLT_COUNT];
145 s8 temp[ADT7473_TEMP_COUNT];
146 s8 temp_min[ADT7473_TEMP_COUNT];
147 s8 temp_max[ADT7473_TEMP_COUNT];
148 s8 temp_tmin[ADT7473_TEMP_COUNT];
149 /* This is called the !THERM limit in the datasheet */
150 s8 temp_tmax[ADT7473_TEMP_COUNT];
152 u16 fan[ADT7473_FAN_COUNT];
153 u16 fan_min[ADT7473_FAN_COUNT];
155 u8 pwm[ADT7473_PWM_COUNT];
156 u8 pwm_max[ADT7473_PWM_COUNT];
157 u8 pwm_min[ADT7473_PWM_COUNT];
158 u8 pwm_behavior[ADT7473_PWM_COUNT];
160 u8 temp_twos_complement;
164 u8 max_duty_at_overheat;
167 static int adt7473_probe(struct i2c_client *client,
168 const struct i2c_device_id *id);
169 static int adt7473_detect(struct i2c_client *client,
170 struct i2c_board_info *info);
171 static int adt7473_remove(struct i2c_client *client);
173 static const struct i2c_device_id adt7473_id[] = {
174 { "adt7473", adt7473 },
178 static struct i2c_driver adt7473_driver = {
179 .class = I2C_CLASS_HWMON,
183 .probe = adt7473_probe,
184 .remove = adt7473_remove,
185 .id_table = adt7473_id,
186 .detect = adt7473_detect,
187 .address_list = normal_i2c,
191 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
192 * that the low byte must be read before the high byte.
194 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
197 foo = i2c_smbus_read_byte_data(client, reg);
198 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
202 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
205 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
206 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
209 static void adt7473_init_client(struct i2c_client *client)
211 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
213 if (!(reg & ADT7473_CFG1_READY)) {
214 dev_err(&client->dev, "Chip not ready.\n");
216 /* start monitoring */
217 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
218 reg | ADT7473_CFG1_START);
222 static struct adt7473_data *adt7473_update_device(struct device *dev)
224 struct i2c_client *client = to_i2c_client(dev);
225 struct adt7473_data *data = i2c_get_clientdata(client);
226 unsigned long local_jiffies = jiffies;
230 mutex_lock(&data->lock);
231 if (time_before(local_jiffies, data->sensors_last_updated +
232 SENSOR_REFRESH_INTERVAL)
233 && data->sensors_valid)
234 goto no_sensor_update;
236 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
237 data->volt[i] = i2c_smbus_read_byte_data(client,
238 ADT7473_REG_VOLT(i));
240 /* Determine temperature encoding */
241 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
242 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
245 * What does this do? it implies a variable temperature sensor
246 * offset, but the datasheet doesn't say anything about this bit
247 * and other parts of the datasheet imply that "offset64" mode
248 * means that you shift temp values by -64 if the above bit was set.
250 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
252 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
253 data->temp[i] = i2c_smbus_read_byte_data(client,
254 ADT7473_REG_TEMP(i));
256 for (i = 0; i < ADT7473_FAN_COUNT; i++)
257 data->fan[i] = adt7473_read_word_data(client,
260 for (i = 0; i < ADT7473_PWM_COUNT; i++)
261 data->pwm[i] = i2c_smbus_read_byte_data(client,
264 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
265 if (data->alarm & ADT7473_OOL)
266 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
267 ADT7473_REG_ALARM2));
269 data->sensors_last_updated = local_jiffies;
270 data->sensors_valid = 1;
273 if (time_before(local_jiffies, data->limits_last_updated +
274 LIMIT_REFRESH_INTERVAL)
275 && data->limits_valid)
278 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
279 data->volt_min[i] = i2c_smbus_read_byte_data(client,
280 ADT7473_REG_VOLT_MIN(i));
281 data->volt_max[i] = i2c_smbus_read_byte_data(client,
282 ADT7473_REG_VOLT_MAX(i));
285 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
286 data->temp_min[i] = i2c_smbus_read_byte_data(client,
287 ADT7473_REG_TEMP_MIN(i));
288 data->temp_max[i] = i2c_smbus_read_byte_data(client,
289 ADT7473_REG_TEMP_MAX(i));
290 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
291 ADT7473_REG_TEMP_TMIN(i));
292 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
293 ADT7473_REG_TEMP_TMAX(i));
296 for (i = 0; i < ADT7473_FAN_COUNT; i++)
297 data->fan_min[i] = adt7473_read_word_data(client,
298 ADT7473_REG_FAN_MIN(i));
300 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
301 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
302 ADT7473_REG_PWM_MAX(i));
303 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
304 ADT7473_REG_PWM_MIN(i));
305 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
306 ADT7473_REG_PWM_BHVR(i));
309 i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
310 data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
312 data->limits_last_updated = local_jiffies;
313 data->limits_valid = 1;
316 mutex_unlock(&data->lock);
324 /* IN are scaled acording to built-in resistors */
325 static const int adt7473_scaling[] = { /* .001 Volts */
328 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
330 static int decode_volt(int volt_index, u8 raw)
332 return SCALE(raw, 192, adt7473_scaling[volt_index]);
335 static u8 encode_volt(int volt_index, int cooked)
337 int raw = SCALE(cooked, adt7473_scaling[volt_index], 192);
338 return SENSORS_LIMIT(raw, 0, 255);
341 static ssize_t show_volt_min(struct device *dev,
342 struct device_attribute *devattr,
345 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
346 struct adt7473_data *data = adt7473_update_device(dev);
347 return sprintf(buf, "%d\n",
348 decode_volt(attr->index, data->volt_min[attr->index]));
351 static ssize_t set_volt_min(struct device *dev,
352 struct device_attribute *devattr,
356 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
357 struct i2c_client *client = to_i2c_client(dev);
358 struct adt7473_data *data = i2c_get_clientdata(client);
361 if (strict_strtol(buf, 10, &volt))
364 volt = encode_volt(attr->index, volt);
366 mutex_lock(&data->lock);
367 data->volt_min[attr->index] = volt;
368 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
370 mutex_unlock(&data->lock);
375 static ssize_t show_volt_max(struct device *dev,
376 struct device_attribute *devattr,
379 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
380 struct adt7473_data *data = adt7473_update_device(dev);
381 return sprintf(buf, "%d\n",
382 decode_volt(attr->index, data->volt_max[attr->index]));
385 static ssize_t set_volt_max(struct device *dev,
386 struct device_attribute *devattr,
390 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
391 struct i2c_client *client = to_i2c_client(dev);
392 struct adt7473_data *data = i2c_get_clientdata(client);
395 if (strict_strtol(buf, 10, &volt))
398 volt = encode_volt(attr->index, volt);
400 mutex_lock(&data->lock);
401 data->volt_max[attr->index] = volt;
402 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
404 mutex_unlock(&data->lock);
409 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
412 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
413 struct adt7473_data *data = adt7473_update_device(dev);
415 return sprintf(buf, "%d\n",
416 decode_volt(attr->index, data->volt[attr->index]));
420 * This chip can report temperature data either as a two's complement
421 * number in the range -128 to 127, or as an unsigned number that must
424 static int decode_temp(u8 twos_complement, u8 raw)
426 return twos_complement ? (s8)raw : raw - 64;
429 static u8 encode_temp(u8 twos_complement, int cooked)
431 u8 ret = twos_complement ? cooked & 0xFF : cooked + 64;
432 return SENSORS_LIMIT(ret, 0, 255);
435 static ssize_t show_temp_min(struct device *dev,
436 struct device_attribute *devattr,
439 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
440 struct adt7473_data *data = adt7473_update_device(dev);
441 return sprintf(buf, "%d\n", 1000 * decode_temp(
442 data->temp_twos_complement,
443 data->temp_min[attr->index]));
446 static ssize_t set_temp_min(struct device *dev,
447 struct device_attribute *devattr,
451 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
452 struct i2c_client *client = to_i2c_client(dev);
453 struct adt7473_data *data = i2c_get_clientdata(client);
456 if (strict_strtol(buf, 10, &temp))
459 temp = DIV_ROUND_CLOSEST(temp, 1000);
460 temp = encode_temp(data->temp_twos_complement, temp);
462 mutex_lock(&data->lock);
463 data->temp_min[attr->index] = temp;
464 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
466 mutex_unlock(&data->lock);
471 static ssize_t show_temp_max(struct device *dev,
472 struct device_attribute *devattr,
475 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
476 struct adt7473_data *data = adt7473_update_device(dev);
477 return sprintf(buf, "%d\n", 1000 * decode_temp(
478 data->temp_twos_complement,
479 data->temp_max[attr->index]));
482 static ssize_t set_temp_max(struct device *dev,
483 struct device_attribute *devattr,
487 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
488 struct i2c_client *client = to_i2c_client(dev);
489 struct adt7473_data *data = i2c_get_clientdata(client);
492 if (strict_strtol(buf, 10, &temp))
495 temp = DIV_ROUND_CLOSEST(temp, 1000);
496 temp = encode_temp(data->temp_twos_complement, temp);
498 mutex_lock(&data->lock);
499 data->temp_max[attr->index] = temp;
500 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
502 mutex_unlock(&data->lock);
507 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
510 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
511 struct adt7473_data *data = adt7473_update_device(dev);
512 return sprintf(buf, "%d\n", 1000 * decode_temp(
513 data->temp_twos_complement,
514 data->temp[attr->index]));
517 static ssize_t show_fan_min(struct device *dev,
518 struct device_attribute *devattr,
521 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
522 struct adt7473_data *data = adt7473_update_device(dev);
524 if (FAN_DATA_VALID(data->fan_min[attr->index]))
525 return sprintf(buf, "%d\n",
526 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
528 return sprintf(buf, "0\n");
531 static ssize_t set_fan_min(struct device *dev,
532 struct device_attribute *devattr,
533 const char *buf, size_t count)
535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
536 struct i2c_client *client = to_i2c_client(dev);
537 struct adt7473_data *data = i2c_get_clientdata(client);
540 if (strict_strtol(buf, 10, &temp) || !temp)
543 temp = FAN_RPM_TO_PERIOD(temp);
544 temp = SENSORS_LIMIT(temp, 1, 65534);
546 mutex_lock(&data->lock);
547 data->fan_min[attr->index] = temp;
548 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
549 mutex_unlock(&data->lock);
554 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
557 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
558 struct adt7473_data *data = adt7473_update_device(dev);
560 if (FAN_DATA_VALID(data->fan[attr->index]))
561 return sprintf(buf, "%d\n",
562 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
564 return sprintf(buf, "0\n");
567 static ssize_t show_max_duty_at_crit(struct device *dev,
568 struct device_attribute *devattr,
571 struct adt7473_data *data = adt7473_update_device(dev);
572 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
575 static ssize_t set_max_duty_at_crit(struct device *dev,
576 struct device_attribute *devattr,
581 struct i2c_client *client = to_i2c_client(dev);
582 struct adt7473_data *data = i2c_get_clientdata(client);
585 if (strict_strtol(buf, 10, &temp))
588 mutex_lock(&data->lock);
589 data->max_duty_at_overheat = !!temp;
590 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
592 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
594 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
595 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
596 mutex_unlock(&data->lock);
601 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
604 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
605 struct adt7473_data *data = adt7473_update_device(dev);
606 return sprintf(buf, "%d\n", data->pwm[attr->index]);
609 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
610 const char *buf, size_t count)
612 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
613 struct i2c_client *client = to_i2c_client(dev);
614 struct adt7473_data *data = i2c_get_clientdata(client);
617 if (strict_strtol(buf, 10, &temp))
620 temp = SENSORS_LIMIT(temp, 0, 255);
622 mutex_lock(&data->lock);
623 data->pwm[attr->index] = temp;
624 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
625 mutex_unlock(&data->lock);
630 static ssize_t show_pwm_max(struct device *dev,
631 struct device_attribute *devattr,
634 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
635 struct adt7473_data *data = adt7473_update_device(dev);
636 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
639 static ssize_t set_pwm_max(struct device *dev,
640 struct device_attribute *devattr,
644 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
645 struct i2c_client *client = to_i2c_client(dev);
646 struct adt7473_data *data = i2c_get_clientdata(client);
649 if (strict_strtol(buf, 10, &temp))
652 temp = SENSORS_LIMIT(temp, 0, 255);
654 mutex_lock(&data->lock);
655 data->pwm_max[attr->index] = temp;
656 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
658 mutex_unlock(&data->lock);
663 static ssize_t show_pwm_min(struct device *dev,
664 struct device_attribute *devattr,
667 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
668 struct adt7473_data *data = adt7473_update_device(dev);
669 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
672 static ssize_t set_pwm_min(struct device *dev,
673 struct device_attribute *devattr,
677 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
678 struct i2c_client *client = to_i2c_client(dev);
679 struct adt7473_data *data = i2c_get_clientdata(client);
682 if (strict_strtol(buf, 10, &temp))
685 temp = SENSORS_LIMIT(temp, 0, 255);
687 mutex_lock(&data->lock);
688 data->pwm_min[attr->index] = temp;
689 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
691 mutex_unlock(&data->lock);
696 static ssize_t show_temp_tmax(struct device *dev,
697 struct device_attribute *devattr,
700 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
701 struct adt7473_data *data = adt7473_update_device(dev);
702 return sprintf(buf, "%d\n", 1000 * decode_temp(
703 data->temp_twos_complement,
704 data->temp_tmax[attr->index]));
707 static ssize_t set_temp_tmax(struct device *dev,
708 struct device_attribute *devattr,
712 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
713 struct i2c_client *client = to_i2c_client(dev);
714 struct adt7473_data *data = i2c_get_clientdata(client);
717 if (strict_strtol(buf, 10, &temp))
720 temp = DIV_ROUND_CLOSEST(temp, 1000);
721 temp = encode_temp(data->temp_twos_complement, temp);
723 mutex_lock(&data->lock);
724 data->temp_tmax[attr->index] = temp;
725 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
727 mutex_unlock(&data->lock);
732 static ssize_t show_temp_tmin(struct device *dev,
733 struct device_attribute *devattr,
736 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
737 struct adt7473_data *data = adt7473_update_device(dev);
738 return sprintf(buf, "%d\n", 1000 * decode_temp(
739 data->temp_twos_complement,
740 data->temp_tmin[attr->index]));
743 static ssize_t set_temp_tmin(struct device *dev,
744 struct device_attribute *devattr,
748 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
749 struct i2c_client *client = to_i2c_client(dev);
750 struct adt7473_data *data = i2c_get_clientdata(client);
753 if (strict_strtol(buf, 10, &temp))
756 temp = DIV_ROUND_CLOSEST(temp, 1000);
757 temp = encode_temp(data->temp_twos_complement, temp);
759 mutex_lock(&data->lock);
760 data->temp_tmin[attr->index] = temp;
761 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
763 mutex_unlock(&data->lock);
768 static ssize_t show_pwm_enable(struct device *dev,
769 struct device_attribute *devattr,
772 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
773 struct adt7473_data *data = adt7473_update_device(dev);
775 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
777 return sprintf(buf, "0\n");
779 return sprintf(buf, "1\n");
781 return sprintf(buf, "2\n");
785 static ssize_t set_pwm_enable(struct device *dev,
786 struct device_attribute *devattr,
791 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
792 struct i2c_client *client = to_i2c_client(dev);
793 struct adt7473_data *data = i2c_get_clientdata(client);
796 if (strict_strtol(buf, 10, &temp))
807 /* Enter automatic mode with fans off */
814 mutex_lock(&data->lock);
815 reg = i2c_smbus_read_byte_data(client,
816 ADT7473_REG_PWM_BHVR(attr->index));
817 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
818 (reg & ~ADT7473_PWM_BHVR_MASK);
819 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
821 data->pwm_behavior[attr->index] = reg;
822 mutex_unlock(&data->lock);
827 static ssize_t show_pwm_auto_temp(struct device *dev,
828 struct device_attribute *devattr,
831 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
832 struct adt7473_data *data = adt7473_update_device(dev);
833 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
839 return sprintf(buf, "0\n");
844 return sprintf(buf, "%d\n", bhvr + 1);
846 return sprintf(buf, "4\n");
848 /* shouldn't ever get here */
852 static ssize_t set_pwm_auto_temp(struct device *dev,
853 struct device_attribute *devattr,
858 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
859 struct i2c_client *client = to_i2c_client(dev);
860 struct adt7473_data *data = i2c_get_clientdata(client);
863 if (strict_strtol(buf, 10, &temp))
880 mutex_lock(&data->lock);
881 reg = i2c_smbus_read_byte_data(client,
882 ADT7473_REG_PWM_BHVR(attr->index));
883 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
884 (reg & ~ADT7473_PWM_BHVR_MASK);
885 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
887 data->pwm_behavior[attr->index] = reg;
888 mutex_unlock(&data->lock);
893 static ssize_t show_alarm(struct device *dev,
894 struct device_attribute *devattr,
897 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
898 struct adt7473_data *data = adt7473_update_device(dev);
900 if (data->alarm & attr->index)
901 return sprintf(buf, "1\n");
903 return sprintf(buf, "0\n");
907 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
909 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
912 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
914 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
917 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
918 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
920 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
922 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
925 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
927 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
929 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
932 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
934 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
936 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
939 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
940 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
941 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
943 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
944 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
945 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
947 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
948 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
950 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
952 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
954 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
956 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
959 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
960 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
961 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
962 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
964 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
965 ALARM2(ADT7473_FAN1_ALARM));
966 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
967 ALARM2(ADT7473_FAN2_ALARM));
968 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
969 ALARM2(ADT7473_FAN3_ALARM));
970 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
971 ALARM2(ADT7473_FAN4_ALARM));
973 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
974 show_max_duty_at_crit, set_max_duty_at_crit, 0);
976 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
977 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
978 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
980 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
981 show_pwm_min, set_pwm_min, 0);
982 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
983 show_pwm_min, set_pwm_min, 1);
984 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
985 show_pwm_min, set_pwm_min, 2);
987 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
988 show_pwm_max, set_pwm_max, 0);
989 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
990 show_pwm_max, set_pwm_max, 1);
991 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
992 show_pwm_max, set_pwm_max, 2);
994 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
995 show_temp_tmin, set_temp_tmin, 0);
996 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
997 show_temp_tmin, set_temp_tmin, 1);
998 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
999 show_temp_tmin, set_temp_tmin, 2);
1001 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
1002 show_temp_tmax, set_temp_tmax, 0);
1003 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
1004 show_temp_tmax, set_temp_tmax, 1);
1005 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
1006 show_temp_tmax, set_temp_tmax, 2);
1008 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
1010 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
1012 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
1015 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
1016 show_pwm_auto_temp, set_pwm_auto_temp, 0);
1017 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
1018 show_pwm_auto_temp, set_pwm_auto_temp, 1);
1019 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
1020 show_pwm_auto_temp, set_pwm_auto_temp, 2);
1022 static struct attribute *adt7473_attr[] =
1024 &sensor_dev_attr_in1_max.dev_attr.attr,
1025 &sensor_dev_attr_in2_max.dev_attr.attr,
1026 &sensor_dev_attr_in1_min.dev_attr.attr,
1027 &sensor_dev_attr_in2_min.dev_attr.attr,
1028 &sensor_dev_attr_in1_input.dev_attr.attr,
1029 &sensor_dev_attr_in2_input.dev_attr.attr,
1030 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1031 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1033 &sensor_dev_attr_temp1_max.dev_attr.attr,
1034 &sensor_dev_attr_temp2_max.dev_attr.attr,
1035 &sensor_dev_attr_temp3_max.dev_attr.attr,
1036 &sensor_dev_attr_temp1_min.dev_attr.attr,
1037 &sensor_dev_attr_temp2_min.dev_attr.attr,
1038 &sensor_dev_attr_temp3_min.dev_attr.attr,
1039 &sensor_dev_attr_temp1_input.dev_attr.attr,
1040 &sensor_dev_attr_temp2_input.dev_attr.attr,
1041 &sensor_dev_attr_temp3_input.dev_attr.attr,
1042 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1043 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1044 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1045 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1046 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1047 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1048 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1049 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1050 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1052 &sensor_dev_attr_fan1_min.dev_attr.attr,
1053 &sensor_dev_attr_fan2_min.dev_attr.attr,
1054 &sensor_dev_attr_fan3_min.dev_attr.attr,
1055 &sensor_dev_attr_fan4_min.dev_attr.attr,
1056 &sensor_dev_attr_fan1_input.dev_attr.attr,
1057 &sensor_dev_attr_fan2_input.dev_attr.attr,
1058 &sensor_dev_attr_fan3_input.dev_attr.attr,
1059 &sensor_dev_attr_fan4_input.dev_attr.attr,
1060 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1061 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1062 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1063 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1065 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1067 &sensor_dev_attr_pwm1.dev_attr.attr,
1068 &sensor_dev_attr_pwm2.dev_attr.attr,
1069 &sensor_dev_attr_pwm3.dev_attr.attr,
1070 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1071 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1072 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1073 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1074 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1075 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1077 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1078 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1079 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1080 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1081 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1082 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1087 /* Return 0 if detection is successful, -ENODEV otherwise */
1088 static int adt7473_detect(struct i2c_client *client,
1089 struct i2c_board_info *info)
1091 struct i2c_adapter *adapter = client->adapter;
1092 int vendor, device, revision;
1094 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1097 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1098 if (vendor != ADT7473_VENDOR)
1101 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1102 if (device != ADT7473_DEVICE)
1105 revision = i2c_smbus_read_byte_data(client, ADT7473_REG_REVISION);
1106 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69)
1109 strlcpy(info->type, "adt7473", I2C_NAME_SIZE);
1114 static int adt7473_probe(struct i2c_client *client,
1115 const struct i2c_device_id *id)
1117 struct adt7473_data *data;
1120 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1126 i2c_set_clientdata(client, data);
1127 mutex_init(&data->lock);
1129 dev_info(&client->dev, "%s chip found\n", client->name);
1131 /* Initialize the ADT7473 chip */
1132 adt7473_init_client(client);
1134 /* Register sysfs hooks */
1135 data->attrs.attrs = adt7473_attr;
1136 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1140 data->hwmon_dev = hwmon_device_register(&client->dev);
1141 if (IS_ERR(data->hwmon_dev)) {
1142 err = PTR_ERR(data->hwmon_dev);
1149 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1156 static int adt7473_remove(struct i2c_client *client)
1158 struct adt7473_data *data = i2c_get_clientdata(client);
1160 hwmon_device_unregister(data->hwmon_dev);
1161 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1166 static int __init adt7473_init(void)
1168 pr_notice("The adt7473 driver is deprecated, please use the adt7475 "
1169 "driver instead\n");
1170 return i2c_add_driver(&adt7473_driver);
1173 static void __exit adt7473_exit(void)
1175 i2c_del_driver(&adt7473_driver);
1178 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1179 MODULE_DESCRIPTION("ADT7473 driver");
1180 MODULE_LICENSE("GPL");
1182 module_init(adt7473_init);
1183 module_exit(adt7473_exit);