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_MAX_ADDR 0x22
43 #define ADT7473_REG_VOLT_MIN_BASE_ADDR 0x46
44 #define ADT7473_REG_VOLT_MIN_MAX_ADDR 0x49
46 #define ADT7473_REG_TEMP_BASE_ADDR 0x25
47 #define ADT7473_REG_TEMP_MAX_ADDR 0x27
48 #define ADT7473_REG_TEMP_LIMITS_BASE_ADDR 0x4E
49 #define ADT7473_REG_TEMP_LIMITS_MAX_ADDR 0x53
50 #define ADT7473_REG_TEMP_TMIN_BASE_ADDR 0x67
51 #define ADT7473_REG_TEMP_TMIN_MAX_ADDR 0x69
52 #define ADT7473_REG_TEMP_TMAX_BASE_ADDR 0x6A
53 #define ADT7473_REG_TEMP_TMAX_MAX_ADDR 0x6C
55 #define ADT7473_REG_FAN_BASE_ADDR 0x28
56 #define ADT7473_REG_FAN_MAX_ADDR 0x2F
57 #define ADT7473_REG_FAN_MIN_BASE_ADDR 0x54
58 #define ADT7473_REG_FAN_MIN_MAX_ADDR 0x5B
60 #define ADT7473_REG_PWM_BASE_ADDR 0x30
61 #define ADT7473_REG_PWM_MAX_ADDR 0x32
62 #define ADT7473_REG_PWM_MIN_BASE_ADDR 0x64
63 #define ADT7473_REG_PWM_MIN_MAX_ADDR 0x66
64 #define ADT7473_REG_PWM_MAX_BASE_ADDR 0x38
65 #define ADT7473_REG_PWM_MAX_MAX_ADDR 0x3A
66 #define ADT7473_REG_PWM_BHVR_BASE_ADDR 0x5C
67 #define ADT7473_REG_PWM_BHVR_MAX_ADDR 0x5E
68 #define ADT7473_PWM_BHVR_MASK 0xE0
69 #define ADT7473_PWM_BHVR_SHIFT 5
71 #define ADT7473_REG_CFG1 0x40
72 #define ADT7473_CFG1_START 0x01
73 #define ADT7473_CFG1_READY 0x04
74 #define ADT7473_REG_CFG2 0x73
75 #define ADT7473_REG_CFG3 0x78
76 #define ADT7473_REG_CFG4 0x7D
77 #define ADT7473_CFG4_MAX_DUTY_AT_OVT 0x08
78 #define ADT7473_REG_CFG5 0x7C
79 #define ADT7473_CFG5_TEMP_TWOS 0x01
80 #define ADT7473_CFG5_TEMP_OFFSET 0x02
82 #define ADT7473_REG_DEVICE 0x3D
83 #define ADT7473_VENDOR 0x41
84 #define ADT7473_REG_VENDOR 0x3E
85 #define ADT7473_DEVICE 0x73
86 #define ADT7473_REG_REVISION 0x3F
87 #define ADT7473_REV_68 0x68
88 #define ADT7473_REV_69 0x69
90 #define ADT7473_REG_ALARM1 0x41
91 #define ADT7473_VCCP_ALARM 0x02
92 #define ADT7473_VCC_ALARM 0x04
93 #define ADT7473_R1T_ALARM 0x10
94 #define ADT7473_LT_ALARM 0x20
95 #define ADT7473_R2T_ALARM 0x40
96 #define ADT7473_OOL 0x80
97 #define ADT7473_REG_ALARM2 0x42
98 #define ADT7473_OVT_ALARM 0x02
99 #define ADT7473_FAN1_ALARM 0x04
100 #define ADT7473_FAN2_ALARM 0x08
101 #define ADT7473_FAN3_ALARM 0x10
102 #define ADT7473_FAN4_ALARM 0x20
103 #define ADT7473_R1T_SHORT 0x40
104 #define ADT7473_R2T_SHORT 0x80
105 #define ADT7473_REG_MAX_ADDR 0x80
107 #define ALARM2(x) ((x) << 8)
109 #define ADT7473_VOLT_COUNT 2
110 #define ADT7473_REG_VOLT(x) (ADT7473_REG_VOLT_BASE_ADDR + (x))
111 #define ADT7473_REG_VOLT_MIN(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + ((x) * 2))
112 #define ADT7473_REG_VOLT_MAX(x) (ADT7473_REG_VOLT_MIN_BASE_ADDR + \
115 #define ADT7473_TEMP_COUNT 3
116 #define ADT7473_REG_TEMP(x) (ADT7473_REG_TEMP_BASE_ADDR + (x))
117 #define ADT7473_REG_TEMP_MIN(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
118 #define ADT7473_REG_TEMP_MAX(x) (ADT7473_REG_TEMP_LIMITS_BASE_ADDR + \
120 #define ADT7473_REG_TEMP_TMIN(x) (ADT7473_REG_TEMP_TMIN_BASE_ADDR + (x))
121 #define ADT7473_REG_TEMP_TMAX(x) (ADT7473_REG_TEMP_TMAX_BASE_ADDR + (x))
123 #define ADT7473_FAN_COUNT 4
124 #define ADT7473_REG_FAN(x) (ADT7473_REG_FAN_BASE_ADDR + ((x) * 2))
125 #define ADT7473_REG_FAN_MIN(x) (ADT7473_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
127 #define ADT7473_PWM_COUNT 3
128 #define ADT7473_REG_PWM(x) (ADT7473_REG_PWM_BASE_ADDR + (x))
129 #define ADT7473_REG_PWM_MAX(x) (ADT7473_REG_PWM_MAX_BASE_ADDR + (x))
130 #define ADT7473_REG_PWM_MIN(x) (ADT7473_REG_PWM_MIN_BASE_ADDR + (x))
131 #define ADT7473_REG_PWM_BHVR(x) (ADT7473_REG_PWM_BHVR_BASE_ADDR + (x))
133 /* How often do we reread sensors values? (In jiffies) */
134 #define SENSOR_REFRESH_INTERVAL (2 * HZ)
136 /* How often do we reread sensor limit values? (In jiffies) */
137 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
139 /* datasheet says to divide this number by the fan reading to get fan rpm */
140 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
141 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
142 #define FAN_PERIOD_INVALID 65535
143 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
145 struct adt7473_data {
146 struct i2c_client client;
147 struct device *hwmon_dev;
148 struct attribute_group attrs;
152 unsigned long sensors_last_updated; /* In jiffies */
153 unsigned long limits_last_updated; /* In jiffies */
155 u8 volt[ADT7473_VOLT_COUNT];
156 s8 volt_min[ADT7473_VOLT_COUNT];
157 s8 volt_max[ADT7473_VOLT_COUNT];
159 s8 temp[ADT7473_TEMP_COUNT];
160 s8 temp_min[ADT7473_TEMP_COUNT];
161 s8 temp_max[ADT7473_TEMP_COUNT];
162 s8 temp_tmin[ADT7473_TEMP_COUNT];
163 /* This is called the !THERM limit in the datasheet */
164 s8 temp_tmax[ADT7473_TEMP_COUNT];
166 u16 fan[ADT7473_FAN_COUNT];
167 u16 fan_min[ADT7473_FAN_COUNT];
169 u8 pwm[ADT7473_PWM_COUNT];
170 u8 pwm_max[ADT7473_PWM_COUNT];
171 u8 pwm_min[ADT7473_PWM_COUNT];
172 u8 pwm_behavior[ADT7473_PWM_COUNT];
174 u8 temp_twos_complement;
178 u8 max_duty_at_overheat;
181 static int adt7473_attach_adapter(struct i2c_adapter *adapter);
182 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind);
183 static int adt7473_detach_client(struct i2c_client *client);
185 static struct i2c_driver adt7473_driver = {
189 .attach_adapter = adt7473_attach_adapter,
190 .detach_client = adt7473_detach_client,
194 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
195 * that the low byte must be read before the high byte.
197 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
200 foo = i2c_smbus_read_byte_data(client, reg);
201 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
205 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
208 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
209 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
212 static void adt7473_init_client(struct i2c_client *client)
214 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
216 if (!(reg & ADT7473_CFG1_READY)) {
217 dev_err(&client->dev, "Chip not ready.\n");
219 /* start monitoring */
220 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
221 reg | ADT7473_CFG1_START);
225 static struct adt7473_data *adt7473_update_device(struct device *dev)
227 struct i2c_client *client = to_i2c_client(dev);
228 struct adt7473_data *data = i2c_get_clientdata(client);
229 unsigned long local_jiffies = jiffies;
233 mutex_lock(&data->lock);
234 if (time_before(local_jiffies, data->sensors_last_updated +
235 SENSOR_REFRESH_INTERVAL)
236 && data->sensors_valid)
237 goto no_sensor_update;
239 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
240 data->volt[i] = i2c_smbus_read_byte_data(client,
241 ADT7473_REG_VOLT(i));
243 /* Determine temperature encoding */
244 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
245 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
248 * What does this do? it implies a variable temperature sensor
249 * offset, but the datasheet doesn't say anything about this bit
250 * and other parts of the datasheet imply that "offset64" mode
251 * means that you shift temp values by -64 if the above bit was set.
253 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
255 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
256 data->temp[i] = i2c_smbus_read_byte_data(client,
257 ADT7473_REG_TEMP(i));
259 for (i = 0; i < ADT7473_FAN_COUNT; i++)
260 data->fan[i] = adt7473_read_word_data(client,
263 for (i = 0; i < ADT7473_PWM_COUNT; i++)
264 data->pwm[i] = i2c_smbus_read_byte_data(client,
267 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
268 if (data->alarm & ADT7473_OOL)
269 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
270 ADT7473_REG_ALARM2));
272 data->sensors_last_updated = local_jiffies;
273 data->sensors_valid = 1;
276 if (time_before(local_jiffies, data->limits_last_updated +
277 LIMIT_REFRESH_INTERVAL)
278 && data->limits_valid)
281 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
282 data->volt_min[i] = i2c_smbus_read_byte_data(client,
283 ADT7473_REG_VOLT_MIN(i));
284 data->volt_max[i] = i2c_smbus_read_byte_data(client,
285 ADT7473_REG_VOLT_MAX(i));
288 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
289 data->temp_min[i] = i2c_smbus_read_byte_data(client,
290 ADT7473_REG_TEMP_MIN(i));
291 data->temp_max[i] = i2c_smbus_read_byte_data(client,
292 ADT7473_REG_TEMP_MAX(i));
293 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
294 ADT7473_REG_TEMP_TMIN(i));
295 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
296 ADT7473_REG_TEMP_TMAX(i));
299 for (i = 0; i < ADT7473_FAN_COUNT; i++)
300 data->fan_min[i] = adt7473_read_word_data(client,
301 ADT7473_REG_FAN_MIN(i));
303 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
304 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
305 ADT7473_REG_PWM_MAX(i));
306 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
307 ADT7473_REG_PWM_MIN(i));
308 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
309 ADT7473_REG_PWM_BHVR(i));
312 data->limits_last_updated = local_jiffies;
313 data->limits_valid = 1;
316 mutex_unlock(&data->lock);
321 * On this chip, voltages are given as a count of steps between a minimum
322 * and maximum voltage, not a direct voltage.
324 static const int volt_convert_table[][2] = {
329 static int decode_volt(int volt_index, u8 raw)
331 int cmax = volt_convert_table[volt_index][0];
332 int cmin = volt_convert_table[volt_index][1];
333 return ((raw * (cmax - cmin)) / 255) + cmin;
336 static u8 encode_volt(int volt_index, int cooked)
338 int cmax = volt_convert_table[volt_index][0];
339 int cmin = volt_convert_table[volt_index][1];
344 else if (cooked < cmin)
347 x = ((cooked - cmin) * 255) / (cmax - cmin);
352 static ssize_t show_volt_min(struct device *dev,
353 struct device_attribute *devattr,
356 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
357 struct adt7473_data *data = adt7473_update_device(dev);
358 return sprintf(buf, "%d\n",
359 decode_volt(attr->index, data->volt_min[attr->index]));
362 static ssize_t set_volt_min(struct device *dev,
363 struct device_attribute *devattr,
367 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
368 struct i2c_client *client = to_i2c_client(dev);
369 struct adt7473_data *data = i2c_get_clientdata(client);
370 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
372 mutex_lock(&data->lock);
373 data->volt_min[attr->index] = volt;
374 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
376 mutex_unlock(&data->lock);
381 static ssize_t show_volt_max(struct device *dev,
382 struct device_attribute *devattr,
385 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
386 struct adt7473_data *data = adt7473_update_device(dev);
387 return sprintf(buf, "%d\n",
388 decode_volt(attr->index, data->volt_max[attr->index]));
391 static ssize_t set_volt_max(struct device *dev,
392 struct device_attribute *devattr,
396 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
397 struct i2c_client *client = to_i2c_client(dev);
398 struct adt7473_data *data = i2c_get_clientdata(client);
399 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
401 mutex_lock(&data->lock);
402 data->volt_max[attr->index] = volt;
403 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
405 mutex_unlock(&data->lock);
410 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
413 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
414 struct adt7473_data *data = adt7473_update_device(dev);
416 return sprintf(buf, "%d\n",
417 decode_volt(attr->index, data->volt[attr->index]));
421 * This chip can report temperature data either as a two's complement
422 * number in the range -128 to 127, or as an unsigned number that must
425 static int decode_temp(struct adt7473_data *data, u8 raw)
427 if (data->temp_twos_complement)
432 static u8 encode_temp(struct adt7473_data *data, int cooked)
434 if (data->temp_twos_complement)
435 return (cooked & 0xFF);
439 static ssize_t show_temp_min(struct device *dev,
440 struct device_attribute *devattr,
443 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
444 struct adt7473_data *data = adt7473_update_device(dev);
445 return sprintf(buf, "%d\n",
446 1000 * decode_temp(data, data->temp_min[attr->index]));
449 static ssize_t set_temp_min(struct device *dev,
450 struct device_attribute *devattr,
454 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
455 struct i2c_client *client = to_i2c_client(dev);
456 struct adt7473_data *data = i2c_get_clientdata(client);
457 int temp = simple_strtol(buf, NULL, 10) / 1000;
458 temp = encode_temp(data, temp);
460 mutex_lock(&data->lock);
461 data->temp_min[attr->index] = temp;
462 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
464 mutex_unlock(&data->lock);
469 static ssize_t show_temp_max(struct device *dev,
470 struct device_attribute *devattr,
473 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
474 struct adt7473_data *data = adt7473_update_device(dev);
475 return sprintf(buf, "%d\n",
476 1000 * decode_temp(data, data->temp_max[attr->index]));
479 static ssize_t set_temp_max(struct device *dev,
480 struct device_attribute *devattr,
484 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
485 struct i2c_client *client = to_i2c_client(dev);
486 struct adt7473_data *data = i2c_get_clientdata(client);
487 int temp = simple_strtol(buf, NULL, 10) / 1000;
488 temp = encode_temp(data, temp);
490 mutex_lock(&data->lock);
491 data->temp_max[attr->index] = temp;
492 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
494 mutex_unlock(&data->lock);
499 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
502 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
503 struct adt7473_data *data = adt7473_update_device(dev);
504 return sprintf(buf, "%d\n",
505 1000 * decode_temp(data, data->temp[attr->index]));
508 static ssize_t show_fan_min(struct device *dev,
509 struct device_attribute *devattr,
512 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
513 struct adt7473_data *data = adt7473_update_device(dev);
515 if (FAN_DATA_VALID(data->fan_min[attr->index]))
516 return sprintf(buf, "%d\n",
517 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
519 return sprintf(buf, "0\n");
522 static ssize_t set_fan_min(struct device *dev,
523 struct device_attribute *devattr,
524 const char *buf, size_t count)
526 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
527 struct i2c_client *client = to_i2c_client(dev);
528 struct adt7473_data *data = i2c_get_clientdata(client);
529 int temp = simple_strtol(buf, NULL, 10);
533 temp = FAN_RPM_TO_PERIOD(temp);
535 mutex_lock(&data->lock);
536 data->fan_min[attr->index] = temp;
537 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
538 mutex_unlock(&data->lock);
543 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
546 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
547 struct adt7473_data *data = adt7473_update_device(dev);
549 if (FAN_DATA_VALID(data->fan[attr->index]))
550 return sprintf(buf, "%d\n",
551 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
553 return sprintf(buf, "0\n");
556 static ssize_t show_max_duty_at_crit(struct device *dev,
557 struct device_attribute *devattr,
560 struct adt7473_data *data = adt7473_update_device(dev);
561 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
564 static ssize_t set_max_duty_at_crit(struct device *dev,
565 struct device_attribute *devattr,
570 struct i2c_client *client = to_i2c_client(dev);
571 struct adt7473_data *data = i2c_get_clientdata(client);
572 int temp = simple_strtol(buf, NULL, 10);
575 mutex_lock(&data->lock);
576 data->max_duty_at_overheat = temp;
577 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
579 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
581 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
582 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
583 mutex_unlock(&data->lock);
588 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
591 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
592 struct adt7473_data *data = adt7473_update_device(dev);
593 return sprintf(buf, "%d\n", data->pwm[attr->index]);
596 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
597 const char *buf, size_t count)
599 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
600 struct i2c_client *client = to_i2c_client(dev);
601 struct adt7473_data *data = i2c_get_clientdata(client);
602 int temp = simple_strtol(buf, NULL, 10);
604 mutex_lock(&data->lock);
605 data->pwm[attr->index] = temp;
606 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
607 mutex_unlock(&data->lock);
612 static ssize_t show_pwm_max(struct device *dev,
613 struct device_attribute *devattr,
616 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
617 struct adt7473_data *data = adt7473_update_device(dev);
618 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
621 static ssize_t set_pwm_max(struct device *dev,
622 struct device_attribute *devattr,
626 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
627 struct i2c_client *client = to_i2c_client(dev);
628 struct adt7473_data *data = i2c_get_clientdata(client);
629 int temp = simple_strtol(buf, NULL, 10);
631 mutex_lock(&data->lock);
632 data->pwm_max[attr->index] = temp;
633 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
635 mutex_unlock(&data->lock);
640 static ssize_t show_pwm_min(struct device *dev,
641 struct device_attribute *devattr,
644 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
645 struct adt7473_data *data = adt7473_update_device(dev);
646 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
649 static ssize_t set_pwm_min(struct device *dev,
650 struct device_attribute *devattr,
654 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
655 struct i2c_client *client = to_i2c_client(dev);
656 struct adt7473_data *data = i2c_get_clientdata(client);
657 int temp = simple_strtol(buf, NULL, 10);
659 mutex_lock(&data->lock);
660 data->pwm_min[attr->index] = temp;
661 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
663 mutex_unlock(&data->lock);
668 static ssize_t show_temp_tmax(struct device *dev,
669 struct device_attribute *devattr,
672 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
673 struct adt7473_data *data = adt7473_update_device(dev);
674 return sprintf(buf, "%d\n",
675 1000 * decode_temp(data, data->temp_tmax[attr->index]));
678 static ssize_t set_temp_tmax(struct device *dev,
679 struct device_attribute *devattr,
683 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
684 struct i2c_client *client = to_i2c_client(dev);
685 struct adt7473_data *data = i2c_get_clientdata(client);
686 int temp = simple_strtol(buf, NULL, 10) / 1000;
687 temp = encode_temp(data, temp);
689 mutex_lock(&data->lock);
690 data->temp_tmax[attr->index] = temp;
691 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
693 mutex_unlock(&data->lock);
698 static ssize_t show_temp_tmin(struct device *dev,
699 struct device_attribute *devattr,
702 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
703 struct adt7473_data *data = adt7473_update_device(dev);
704 return sprintf(buf, "%d\n",
705 1000 * decode_temp(data, data->temp_tmin[attr->index]));
708 static ssize_t set_temp_tmin(struct device *dev,
709 struct device_attribute *devattr,
713 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
714 struct i2c_client *client = to_i2c_client(dev);
715 struct adt7473_data *data = i2c_get_clientdata(client);
716 int temp = simple_strtol(buf, NULL, 10) / 1000;
717 temp = encode_temp(data, temp);
719 mutex_lock(&data->lock);
720 data->temp_tmin[attr->index] = temp;
721 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
723 mutex_unlock(&data->lock);
728 static ssize_t show_pwm_enable(struct device *dev,
729 struct device_attribute *devattr,
732 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
733 struct adt7473_data *data = adt7473_update_device(dev);
735 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
737 return sprintf(buf, "0\n");
739 return sprintf(buf, "1\n");
741 return sprintf(buf, "2\n");
745 static ssize_t set_pwm_enable(struct device *dev,
746 struct device_attribute *devattr,
751 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
752 struct i2c_client *client = to_i2c_client(dev);
753 struct adt7473_data *data = i2c_get_clientdata(client);
754 int temp = simple_strtol(buf, NULL, 10);
764 /* Enter automatic mode with fans off */
771 mutex_lock(&data->lock);
772 reg = i2c_smbus_read_byte_data(client,
773 ADT7473_REG_PWM_BHVR(attr->index));
774 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
775 (reg & ~ADT7473_PWM_BHVR_MASK);
776 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
778 data->pwm_behavior[attr->index] = reg;
779 mutex_unlock(&data->lock);
784 static ssize_t show_pwm_auto_temp(struct device *dev,
785 struct device_attribute *devattr,
788 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
789 struct adt7473_data *data = adt7473_update_device(dev);
790 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
796 return sprintf(buf, "0\n");
801 return sprintf(buf, "%d\n", bhvr + 1);
803 return sprintf(buf, "4\n");
805 /* shouldn't ever get here */
809 static ssize_t set_pwm_auto_temp(struct device *dev,
810 struct device_attribute *devattr,
815 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
816 struct i2c_client *client = to_i2c_client(dev);
817 struct adt7473_data *data = i2c_get_clientdata(client);
818 int temp = simple_strtol(buf, NULL, 10);
834 mutex_lock(&data->lock);
835 reg = i2c_smbus_read_byte_data(client,
836 ADT7473_REG_PWM_BHVR(attr->index));
837 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
838 (reg & ~ADT7473_PWM_BHVR_MASK);
839 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
841 data->pwm_behavior[attr->index] = reg;
842 mutex_unlock(&data->lock);
847 static ssize_t show_alarm(struct device *dev,
848 struct device_attribute *devattr,
851 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
852 struct adt7473_data *data = adt7473_update_device(dev);
854 if (data->alarm & attr->index)
855 return sprintf(buf, "1\n");
857 return sprintf(buf, "0\n");
861 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
863 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
866 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
868 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
871 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
872 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
874 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
876 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
879 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
881 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
883 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
886 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
888 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
890 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
893 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
894 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
895 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
897 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
898 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
899 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
901 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
902 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
904 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
906 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
908 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
910 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
913 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
914 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
915 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
916 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
918 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
919 ALARM2(ADT7473_FAN1_ALARM));
920 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
921 ALARM2(ADT7473_FAN2_ALARM));
922 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
923 ALARM2(ADT7473_FAN3_ALARM));
924 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
925 ALARM2(ADT7473_FAN4_ALARM));
927 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
928 show_max_duty_at_crit, set_max_duty_at_crit, 0);
930 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
931 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
932 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
934 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
935 show_pwm_min, set_pwm_min, 0);
936 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
937 show_pwm_min, set_pwm_min, 1);
938 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
939 show_pwm_min, set_pwm_min, 2);
941 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
942 show_pwm_max, set_pwm_max, 0);
943 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
944 show_pwm_max, set_pwm_max, 1);
945 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
946 show_pwm_max, set_pwm_max, 2);
948 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
949 show_temp_tmin, set_temp_tmin, 0);
950 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
951 show_temp_tmin, set_temp_tmin, 1);
952 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
953 show_temp_tmin, set_temp_tmin, 2);
955 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
956 show_temp_tmax, set_temp_tmax, 0);
957 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
958 show_temp_tmax, set_temp_tmax, 1);
959 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
960 show_temp_tmax, set_temp_tmax, 2);
962 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
964 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
966 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
969 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
970 show_pwm_auto_temp, set_pwm_auto_temp, 0);
971 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
972 show_pwm_auto_temp, set_pwm_auto_temp, 1);
973 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
974 show_pwm_auto_temp, set_pwm_auto_temp, 2);
976 static struct attribute *adt7473_attr[] =
978 &sensor_dev_attr_in1_max.dev_attr.attr,
979 &sensor_dev_attr_in2_max.dev_attr.attr,
980 &sensor_dev_attr_in1_min.dev_attr.attr,
981 &sensor_dev_attr_in2_min.dev_attr.attr,
982 &sensor_dev_attr_in1_input.dev_attr.attr,
983 &sensor_dev_attr_in2_input.dev_attr.attr,
984 &sensor_dev_attr_in1_alarm.dev_attr.attr,
985 &sensor_dev_attr_in2_alarm.dev_attr.attr,
987 &sensor_dev_attr_temp1_max.dev_attr.attr,
988 &sensor_dev_attr_temp2_max.dev_attr.attr,
989 &sensor_dev_attr_temp3_max.dev_attr.attr,
990 &sensor_dev_attr_temp1_min.dev_attr.attr,
991 &sensor_dev_attr_temp2_min.dev_attr.attr,
992 &sensor_dev_attr_temp3_min.dev_attr.attr,
993 &sensor_dev_attr_temp1_input.dev_attr.attr,
994 &sensor_dev_attr_temp2_input.dev_attr.attr,
995 &sensor_dev_attr_temp3_input.dev_attr.attr,
996 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
997 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
998 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
999 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1000 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1001 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1002 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1003 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1004 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1006 &sensor_dev_attr_fan1_min.dev_attr.attr,
1007 &sensor_dev_attr_fan2_min.dev_attr.attr,
1008 &sensor_dev_attr_fan3_min.dev_attr.attr,
1009 &sensor_dev_attr_fan4_min.dev_attr.attr,
1010 &sensor_dev_attr_fan1_input.dev_attr.attr,
1011 &sensor_dev_attr_fan2_input.dev_attr.attr,
1012 &sensor_dev_attr_fan3_input.dev_attr.attr,
1013 &sensor_dev_attr_fan4_input.dev_attr.attr,
1014 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1015 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1016 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1017 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1019 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1021 &sensor_dev_attr_pwm1.dev_attr.attr,
1022 &sensor_dev_attr_pwm2.dev_attr.attr,
1023 &sensor_dev_attr_pwm3.dev_attr.attr,
1024 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1025 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1026 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1027 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1028 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1029 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1031 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1032 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1033 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1034 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1035 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1036 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1041 static int adt7473_attach_adapter(struct i2c_adapter *adapter)
1043 if (!(adapter->class & I2C_CLASS_HWMON))
1045 return i2c_probe(adapter, &addr_data, adt7473_detect);
1048 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind)
1050 struct i2c_client *client;
1051 struct adt7473_data *data;
1054 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1057 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1063 client = &data->client;
1064 client->addr = address;
1065 client->adapter = adapter;
1066 client->driver = &adt7473_driver;
1068 i2c_set_clientdata(client, data);
1070 mutex_init(&data->lock);
1073 int vendor, device, revision;
1075 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1076 if (vendor != ADT7473_VENDOR) {
1081 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1082 if (device != ADT7473_DEVICE) {
1087 revision = i2c_smbus_read_byte_data(client,
1088 ADT7473_REG_REVISION);
1089 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) {
1094 dev_dbg(&adapter->dev, "detection forced\n");
1096 strlcpy(client->name, "adt7473", I2C_NAME_SIZE);
1098 err = i2c_attach_client(client);
1102 dev_info(&client->dev, "%s chip found\n", client->name);
1104 /* Initialize the ADT7473 chip */
1105 adt7473_init_client(client);
1107 /* Register sysfs hooks */
1108 data->attrs.attrs = adt7473_attr;
1109 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1113 data->hwmon_dev = hwmon_device_register(&client->dev);
1114 if (IS_ERR(data->hwmon_dev)) {
1115 err = PTR_ERR(data->hwmon_dev);
1122 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1124 i2c_detach_client(client);
1131 static int adt7473_detach_client(struct i2c_client *client)
1133 struct adt7473_data *data = i2c_get_clientdata(client);
1135 hwmon_device_unregister(data->hwmon_dev);
1136 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1137 i2c_detach_client(client);
1142 static int __init adt7473_init(void)
1144 return i2c_add_driver(&adt7473_driver);
1147 static void __exit adt7473_exit(void)
1149 i2c_del_driver(&adt7473_driver);
1152 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1153 MODULE_DESCRIPTION("ADT7473 driver");
1154 MODULE_LICENSE("GPL");
1156 module_init(adt7473_init);
1157 module_exit(adt7473_exit);