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 i2c_client client;
134 struct device *hwmon_dev;
135 struct attribute_group attrs;
139 unsigned long sensors_last_updated; /* In jiffies */
140 unsigned long limits_last_updated; /* In jiffies */
142 u8 volt[ADT7473_VOLT_COUNT];
143 s8 volt_min[ADT7473_VOLT_COUNT];
144 s8 volt_max[ADT7473_VOLT_COUNT];
146 s8 temp[ADT7473_TEMP_COUNT];
147 s8 temp_min[ADT7473_TEMP_COUNT];
148 s8 temp_max[ADT7473_TEMP_COUNT];
149 s8 temp_tmin[ADT7473_TEMP_COUNT];
150 /* This is called the !THERM limit in the datasheet */
151 s8 temp_tmax[ADT7473_TEMP_COUNT];
153 u16 fan[ADT7473_FAN_COUNT];
154 u16 fan_min[ADT7473_FAN_COUNT];
156 u8 pwm[ADT7473_PWM_COUNT];
157 u8 pwm_max[ADT7473_PWM_COUNT];
158 u8 pwm_min[ADT7473_PWM_COUNT];
159 u8 pwm_behavior[ADT7473_PWM_COUNT];
161 u8 temp_twos_complement;
165 u8 max_duty_at_overheat;
168 static int adt7473_attach_adapter(struct i2c_adapter *adapter);
169 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind);
170 static int adt7473_detach_client(struct i2c_client *client);
172 static struct i2c_driver adt7473_driver = {
176 .attach_adapter = adt7473_attach_adapter,
177 .detach_client = adt7473_detach_client,
181 * 16-bit registers on the ADT7473 are low-byte first. The data sheet says
182 * that the low byte must be read before the high byte.
184 static inline int adt7473_read_word_data(struct i2c_client *client, u8 reg)
187 foo = i2c_smbus_read_byte_data(client, reg);
188 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
192 static inline int adt7473_write_word_data(struct i2c_client *client, u8 reg,
195 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
196 && i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
199 static void adt7473_init_client(struct i2c_client *client)
201 int reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG1);
203 if (!(reg & ADT7473_CFG1_READY)) {
204 dev_err(&client->dev, "Chip not ready.\n");
206 /* start monitoring */
207 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG1,
208 reg | ADT7473_CFG1_START);
212 static struct adt7473_data *adt7473_update_device(struct device *dev)
214 struct i2c_client *client = to_i2c_client(dev);
215 struct adt7473_data *data = i2c_get_clientdata(client);
216 unsigned long local_jiffies = jiffies;
220 mutex_lock(&data->lock);
221 if (time_before(local_jiffies, data->sensors_last_updated +
222 SENSOR_REFRESH_INTERVAL)
223 && data->sensors_valid)
224 goto no_sensor_update;
226 for (i = 0; i < ADT7473_VOLT_COUNT; i++)
227 data->volt[i] = i2c_smbus_read_byte_data(client,
228 ADT7473_REG_VOLT(i));
230 /* Determine temperature encoding */
231 cfg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG5);
232 data->temp_twos_complement = (cfg & ADT7473_CFG5_TEMP_TWOS);
235 * What does this do? it implies a variable temperature sensor
236 * offset, but the datasheet doesn't say anything about this bit
237 * and other parts of the datasheet imply that "offset64" mode
238 * means that you shift temp values by -64 if the above bit was set.
240 data->temp_offset = (cfg & ADT7473_CFG5_TEMP_OFFSET);
242 for (i = 0; i < ADT7473_TEMP_COUNT; i++)
243 data->temp[i] = i2c_smbus_read_byte_data(client,
244 ADT7473_REG_TEMP(i));
246 for (i = 0; i < ADT7473_FAN_COUNT; i++)
247 data->fan[i] = adt7473_read_word_data(client,
250 for (i = 0; i < ADT7473_PWM_COUNT; i++)
251 data->pwm[i] = i2c_smbus_read_byte_data(client,
254 data->alarm = i2c_smbus_read_byte_data(client, ADT7473_REG_ALARM1);
255 if (data->alarm & ADT7473_OOL)
256 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
257 ADT7473_REG_ALARM2));
259 data->sensors_last_updated = local_jiffies;
260 data->sensors_valid = 1;
263 if (time_before(local_jiffies, data->limits_last_updated +
264 LIMIT_REFRESH_INTERVAL)
265 && data->limits_valid)
268 for (i = 0; i < ADT7473_VOLT_COUNT; i++) {
269 data->volt_min[i] = i2c_smbus_read_byte_data(client,
270 ADT7473_REG_VOLT_MIN(i));
271 data->volt_max[i] = i2c_smbus_read_byte_data(client,
272 ADT7473_REG_VOLT_MAX(i));
275 for (i = 0; i < ADT7473_TEMP_COUNT; i++) {
276 data->temp_min[i] = i2c_smbus_read_byte_data(client,
277 ADT7473_REG_TEMP_MIN(i));
278 data->temp_max[i] = i2c_smbus_read_byte_data(client,
279 ADT7473_REG_TEMP_MAX(i));
280 data->temp_tmin[i] = i2c_smbus_read_byte_data(client,
281 ADT7473_REG_TEMP_TMIN(i));
282 data->temp_tmax[i] = i2c_smbus_read_byte_data(client,
283 ADT7473_REG_TEMP_TMAX(i));
286 for (i = 0; i < ADT7473_FAN_COUNT; i++)
287 data->fan_min[i] = adt7473_read_word_data(client,
288 ADT7473_REG_FAN_MIN(i));
290 for (i = 0; i < ADT7473_PWM_COUNT; i++) {
291 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
292 ADT7473_REG_PWM_MAX(i));
293 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
294 ADT7473_REG_PWM_MIN(i));
295 data->pwm_behavior[i] = i2c_smbus_read_byte_data(client,
296 ADT7473_REG_PWM_BHVR(i));
299 i = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
300 data->max_duty_at_overheat = !!(i & ADT7473_CFG4_MAX_DUTY_AT_OVT);
302 data->limits_last_updated = local_jiffies;
303 data->limits_valid = 1;
306 mutex_unlock(&data->lock);
311 * On this chip, voltages are given as a count of steps between a minimum
312 * and maximum voltage, not a direct voltage.
314 static const int volt_convert_table[][2] = {
319 static int decode_volt(int volt_index, u8 raw)
321 int cmax = volt_convert_table[volt_index][0];
322 int cmin = volt_convert_table[volt_index][1];
323 return ((raw * (cmax - cmin)) / 255) + cmin;
326 static u8 encode_volt(int volt_index, int cooked)
328 int cmax = volt_convert_table[volt_index][0];
329 int cmin = volt_convert_table[volt_index][1];
334 else if (cooked < cmin)
337 x = ((cooked - cmin) * 255) / (cmax - cmin);
342 static ssize_t show_volt_min(struct device *dev,
343 struct device_attribute *devattr,
346 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
347 struct adt7473_data *data = adt7473_update_device(dev);
348 return sprintf(buf, "%d\n",
349 decode_volt(attr->index, data->volt_min[attr->index]));
352 static ssize_t set_volt_min(struct device *dev,
353 struct device_attribute *devattr,
357 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
358 struct i2c_client *client = to_i2c_client(dev);
359 struct adt7473_data *data = i2c_get_clientdata(client);
360 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
362 mutex_lock(&data->lock);
363 data->volt_min[attr->index] = volt;
364 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MIN(attr->index),
366 mutex_unlock(&data->lock);
371 static ssize_t show_volt_max(struct device *dev,
372 struct device_attribute *devattr,
375 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
376 struct adt7473_data *data = adt7473_update_device(dev);
377 return sprintf(buf, "%d\n",
378 decode_volt(attr->index, data->volt_max[attr->index]));
381 static ssize_t set_volt_max(struct device *dev,
382 struct device_attribute *devattr,
386 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
387 struct i2c_client *client = to_i2c_client(dev);
388 struct adt7473_data *data = i2c_get_clientdata(client);
389 int volt = encode_volt(attr->index, simple_strtol(buf, NULL, 10));
391 mutex_lock(&data->lock);
392 data->volt_max[attr->index] = volt;
393 i2c_smbus_write_byte_data(client, ADT7473_REG_VOLT_MAX(attr->index),
395 mutex_unlock(&data->lock);
400 static ssize_t show_volt(struct device *dev, struct device_attribute *devattr,
403 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
404 struct adt7473_data *data = adt7473_update_device(dev);
406 return sprintf(buf, "%d\n",
407 decode_volt(attr->index, data->volt[attr->index]));
411 * This chip can report temperature data either as a two's complement
412 * number in the range -128 to 127, or as an unsigned number that must
415 static int decode_temp(u8 twos_complement, u8 raw)
417 return twos_complement ? (s8)raw : raw - 64;
420 static u8 encode_temp(u8 twos_complement, int cooked)
422 return twos_complement ? cooked & 0xFF : cooked + 64;
425 static ssize_t show_temp_min(struct device *dev,
426 struct device_attribute *devattr,
429 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
430 struct adt7473_data *data = adt7473_update_device(dev);
431 return sprintf(buf, "%d\n", 1000 * decode_temp(
432 data->temp_twos_complement,
433 data->temp_min[attr->index]));
436 static ssize_t set_temp_min(struct device *dev,
437 struct device_attribute *devattr,
441 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
442 struct i2c_client *client = to_i2c_client(dev);
443 struct adt7473_data *data = i2c_get_clientdata(client);
444 int temp = simple_strtol(buf, NULL, 10) / 1000;
445 temp = encode_temp(data->temp_twos_complement, temp);
447 mutex_lock(&data->lock);
448 data->temp_min[attr->index] = temp;
449 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MIN(attr->index),
451 mutex_unlock(&data->lock);
456 static ssize_t show_temp_max(struct device *dev,
457 struct device_attribute *devattr,
460 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
461 struct adt7473_data *data = adt7473_update_device(dev);
462 return sprintf(buf, "%d\n", 1000 * decode_temp(
463 data->temp_twos_complement,
464 data->temp_max[attr->index]));
467 static ssize_t set_temp_max(struct device *dev,
468 struct device_attribute *devattr,
472 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
473 struct i2c_client *client = to_i2c_client(dev);
474 struct adt7473_data *data = i2c_get_clientdata(client);
475 int temp = simple_strtol(buf, NULL, 10) / 1000;
476 temp = encode_temp(data->temp_twos_complement, temp);
478 mutex_lock(&data->lock);
479 data->temp_max[attr->index] = temp;
480 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_MAX(attr->index),
482 mutex_unlock(&data->lock);
487 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
490 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
491 struct adt7473_data *data = adt7473_update_device(dev);
492 return sprintf(buf, "%d\n", 1000 * decode_temp(
493 data->temp_twos_complement,
494 data->temp[attr->index]));
497 static ssize_t show_fan_min(struct device *dev,
498 struct device_attribute *devattr,
501 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
502 struct adt7473_data *data = adt7473_update_device(dev);
504 if (FAN_DATA_VALID(data->fan_min[attr->index]))
505 return sprintf(buf, "%d\n",
506 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
508 return sprintf(buf, "0\n");
511 static ssize_t set_fan_min(struct device *dev,
512 struct device_attribute *devattr,
513 const char *buf, size_t count)
515 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
516 struct i2c_client *client = to_i2c_client(dev);
517 struct adt7473_data *data = i2c_get_clientdata(client);
518 int temp = simple_strtol(buf, NULL, 10);
522 temp = FAN_RPM_TO_PERIOD(temp);
524 mutex_lock(&data->lock);
525 data->fan_min[attr->index] = temp;
526 adt7473_write_word_data(client, ADT7473_REG_FAN_MIN(attr->index), temp);
527 mutex_unlock(&data->lock);
532 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
536 struct adt7473_data *data = adt7473_update_device(dev);
538 if (FAN_DATA_VALID(data->fan[attr->index]))
539 return sprintf(buf, "%d\n",
540 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
542 return sprintf(buf, "0\n");
545 static ssize_t show_max_duty_at_crit(struct device *dev,
546 struct device_attribute *devattr,
549 struct adt7473_data *data = adt7473_update_device(dev);
550 return sprintf(buf, "%d\n", data->max_duty_at_overheat);
553 static ssize_t set_max_duty_at_crit(struct device *dev,
554 struct device_attribute *devattr,
559 struct i2c_client *client = to_i2c_client(dev);
560 struct adt7473_data *data = i2c_get_clientdata(client);
561 int temp = simple_strtol(buf, NULL, 10);
564 mutex_lock(&data->lock);
565 data->max_duty_at_overheat = temp;
566 reg = i2c_smbus_read_byte_data(client, ADT7473_REG_CFG4);
568 reg |= ADT7473_CFG4_MAX_DUTY_AT_OVT;
570 reg &= ~ADT7473_CFG4_MAX_DUTY_AT_OVT;
571 i2c_smbus_write_byte_data(client, ADT7473_REG_CFG4, reg);
572 mutex_unlock(&data->lock);
577 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
580 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
581 struct adt7473_data *data = adt7473_update_device(dev);
582 return sprintf(buf, "%d\n", data->pwm[attr->index]);
585 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
586 const char *buf, size_t count)
588 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
589 struct i2c_client *client = to_i2c_client(dev);
590 struct adt7473_data *data = i2c_get_clientdata(client);
591 int temp = simple_strtol(buf, NULL, 10);
593 mutex_lock(&data->lock);
594 data->pwm[attr->index] = temp;
595 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM(attr->index), temp);
596 mutex_unlock(&data->lock);
601 static ssize_t show_pwm_max(struct device *dev,
602 struct device_attribute *devattr,
605 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
606 struct adt7473_data *data = adt7473_update_device(dev);
607 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
610 static ssize_t set_pwm_max(struct device *dev,
611 struct device_attribute *devattr,
615 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
616 struct i2c_client *client = to_i2c_client(dev);
617 struct adt7473_data *data = i2c_get_clientdata(client);
618 int temp = simple_strtol(buf, NULL, 10);
620 mutex_lock(&data->lock);
621 data->pwm_max[attr->index] = temp;
622 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MAX(attr->index),
624 mutex_unlock(&data->lock);
629 static ssize_t show_pwm_min(struct device *dev,
630 struct device_attribute *devattr,
633 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
634 struct adt7473_data *data = adt7473_update_device(dev);
635 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
638 static ssize_t set_pwm_min(struct device *dev,
639 struct device_attribute *devattr,
643 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
644 struct i2c_client *client = to_i2c_client(dev);
645 struct adt7473_data *data = i2c_get_clientdata(client);
646 int temp = simple_strtol(buf, NULL, 10);
648 mutex_lock(&data->lock);
649 data->pwm_min[attr->index] = temp;
650 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_MIN(attr->index),
652 mutex_unlock(&data->lock);
657 static ssize_t show_temp_tmax(struct device *dev,
658 struct device_attribute *devattr,
661 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
662 struct adt7473_data *data = adt7473_update_device(dev);
663 return sprintf(buf, "%d\n", 1000 * decode_temp(
664 data->temp_twos_complement,
665 data->temp_tmax[attr->index]));
668 static ssize_t set_temp_tmax(struct device *dev,
669 struct device_attribute *devattr,
673 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
674 struct i2c_client *client = to_i2c_client(dev);
675 struct adt7473_data *data = i2c_get_clientdata(client);
676 int temp = simple_strtol(buf, NULL, 10) / 1000;
677 temp = encode_temp(data->temp_twos_complement, temp);
679 mutex_lock(&data->lock);
680 data->temp_tmax[attr->index] = temp;
681 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMAX(attr->index),
683 mutex_unlock(&data->lock);
688 static ssize_t show_temp_tmin(struct device *dev,
689 struct device_attribute *devattr,
692 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
693 struct adt7473_data *data = adt7473_update_device(dev);
694 return sprintf(buf, "%d\n", 1000 * decode_temp(
695 data->temp_twos_complement,
696 data->temp_tmin[attr->index]));
699 static ssize_t set_temp_tmin(struct device *dev,
700 struct device_attribute *devattr,
704 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
705 struct i2c_client *client = to_i2c_client(dev);
706 struct adt7473_data *data = i2c_get_clientdata(client);
707 int temp = simple_strtol(buf, NULL, 10) / 1000;
708 temp = encode_temp(data->temp_twos_complement, temp);
710 mutex_lock(&data->lock);
711 data->temp_tmin[attr->index] = temp;
712 i2c_smbus_write_byte_data(client, ADT7473_REG_TEMP_TMIN(attr->index),
714 mutex_unlock(&data->lock);
719 static ssize_t show_pwm_enable(struct device *dev,
720 struct device_attribute *devattr,
723 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
724 struct adt7473_data *data = adt7473_update_device(dev);
726 switch (data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT) {
728 return sprintf(buf, "0\n");
730 return sprintf(buf, "1\n");
732 return sprintf(buf, "2\n");
736 static ssize_t set_pwm_enable(struct device *dev,
737 struct device_attribute *devattr,
742 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
743 struct i2c_client *client = to_i2c_client(dev);
744 struct adt7473_data *data = i2c_get_clientdata(client);
745 int temp = simple_strtol(buf, NULL, 10);
755 /* Enter automatic mode with fans off */
762 mutex_lock(&data->lock);
763 reg = i2c_smbus_read_byte_data(client,
764 ADT7473_REG_PWM_BHVR(attr->index));
765 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
766 (reg & ~ADT7473_PWM_BHVR_MASK);
767 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
769 data->pwm_behavior[attr->index] = reg;
770 mutex_unlock(&data->lock);
775 static ssize_t show_pwm_auto_temp(struct device *dev,
776 struct device_attribute *devattr,
779 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
780 struct adt7473_data *data = adt7473_update_device(dev);
781 int bhvr = data->pwm_behavior[attr->index] >> ADT7473_PWM_BHVR_SHIFT;
787 return sprintf(buf, "0\n");
792 return sprintf(buf, "%d\n", bhvr + 1);
794 return sprintf(buf, "4\n");
796 /* shouldn't ever get here */
800 static ssize_t set_pwm_auto_temp(struct device *dev,
801 struct device_attribute *devattr,
806 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
807 struct i2c_client *client = to_i2c_client(dev);
808 struct adt7473_data *data = i2c_get_clientdata(client);
809 int temp = simple_strtol(buf, NULL, 10);
825 mutex_lock(&data->lock);
826 reg = i2c_smbus_read_byte_data(client,
827 ADT7473_REG_PWM_BHVR(attr->index));
828 reg = (temp << ADT7473_PWM_BHVR_SHIFT) |
829 (reg & ~ADT7473_PWM_BHVR_MASK);
830 i2c_smbus_write_byte_data(client, ADT7473_REG_PWM_BHVR(attr->index),
832 data->pwm_behavior[attr->index] = reg;
833 mutex_unlock(&data->lock);
838 static ssize_t show_alarm(struct device *dev,
839 struct device_attribute *devattr,
842 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
843 struct adt7473_data *data = adt7473_update_device(dev);
845 if (data->alarm & attr->index)
846 return sprintf(buf, "1\n");
848 return sprintf(buf, "0\n");
852 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_volt_max,
854 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_volt_max,
857 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_volt_min,
859 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_volt_min,
862 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_volt, NULL, 0);
863 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_volt, NULL, 1);
865 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL,
867 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL,
870 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
872 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
874 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
877 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
879 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
881 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
884 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
885 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
886 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
888 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
889 ADT7473_R1T_ALARM | ALARM2(ADT7473_R1T_SHORT));
890 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
892 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
893 ADT7473_R2T_ALARM | ALARM2(ADT7473_R2T_SHORT));
895 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
897 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
899 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
901 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
904 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
905 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
906 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
907 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
909 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
910 ALARM2(ADT7473_FAN1_ALARM));
911 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
912 ALARM2(ADT7473_FAN2_ALARM));
913 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
914 ALARM2(ADT7473_FAN3_ALARM));
915 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
916 ALARM2(ADT7473_FAN4_ALARM));
918 static SENSOR_DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
919 show_max_duty_at_crit, set_max_duty_at_crit, 0);
921 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
922 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
923 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
925 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
926 show_pwm_min, set_pwm_min, 0);
927 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
928 show_pwm_min, set_pwm_min, 1);
929 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
930 show_pwm_min, set_pwm_min, 2);
932 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
933 show_pwm_max, set_pwm_max, 0);
934 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
935 show_pwm_max, set_pwm_max, 1);
936 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
937 show_pwm_max, set_pwm_max, 2);
939 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IWUSR | S_IRUGO,
940 show_temp_tmin, set_temp_tmin, 0);
941 static SENSOR_DEVICE_ATTR(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
942 show_temp_tmin, set_temp_tmin, 1);
943 static SENSOR_DEVICE_ATTR(temp3_auto_point1_temp, S_IWUSR | S_IRUGO,
944 show_temp_tmin, set_temp_tmin, 2);
946 static SENSOR_DEVICE_ATTR(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
947 show_temp_tmax, set_temp_tmax, 0);
948 static SENSOR_DEVICE_ATTR(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
949 show_temp_tmax, set_temp_tmax, 1);
950 static SENSOR_DEVICE_ATTR(temp3_auto_point2_temp, S_IWUSR | S_IRUGO,
951 show_temp_tmax, set_temp_tmax, 2);
953 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
955 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
957 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_enable,
960 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
961 show_pwm_auto_temp, set_pwm_auto_temp, 0);
962 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
963 show_pwm_auto_temp, set_pwm_auto_temp, 1);
964 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
965 show_pwm_auto_temp, set_pwm_auto_temp, 2);
967 static struct attribute *adt7473_attr[] =
969 &sensor_dev_attr_in1_max.dev_attr.attr,
970 &sensor_dev_attr_in2_max.dev_attr.attr,
971 &sensor_dev_attr_in1_min.dev_attr.attr,
972 &sensor_dev_attr_in2_min.dev_attr.attr,
973 &sensor_dev_attr_in1_input.dev_attr.attr,
974 &sensor_dev_attr_in2_input.dev_attr.attr,
975 &sensor_dev_attr_in1_alarm.dev_attr.attr,
976 &sensor_dev_attr_in2_alarm.dev_attr.attr,
978 &sensor_dev_attr_temp1_max.dev_attr.attr,
979 &sensor_dev_attr_temp2_max.dev_attr.attr,
980 &sensor_dev_attr_temp3_max.dev_attr.attr,
981 &sensor_dev_attr_temp1_min.dev_attr.attr,
982 &sensor_dev_attr_temp2_min.dev_attr.attr,
983 &sensor_dev_attr_temp3_min.dev_attr.attr,
984 &sensor_dev_attr_temp1_input.dev_attr.attr,
985 &sensor_dev_attr_temp2_input.dev_attr.attr,
986 &sensor_dev_attr_temp3_input.dev_attr.attr,
987 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
988 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
989 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
990 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
991 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
992 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
993 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
994 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
995 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
997 &sensor_dev_attr_fan1_min.dev_attr.attr,
998 &sensor_dev_attr_fan2_min.dev_attr.attr,
999 &sensor_dev_attr_fan3_min.dev_attr.attr,
1000 &sensor_dev_attr_fan4_min.dev_attr.attr,
1001 &sensor_dev_attr_fan1_input.dev_attr.attr,
1002 &sensor_dev_attr_fan2_input.dev_attr.attr,
1003 &sensor_dev_attr_fan3_input.dev_attr.attr,
1004 &sensor_dev_attr_fan4_input.dev_attr.attr,
1005 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1006 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1007 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1008 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1010 &sensor_dev_attr_pwm_use_point2_pwm_at_crit.dev_attr.attr,
1012 &sensor_dev_attr_pwm1.dev_attr.attr,
1013 &sensor_dev_attr_pwm2.dev_attr.attr,
1014 &sensor_dev_attr_pwm3.dev_attr.attr,
1015 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1016 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1017 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1018 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1019 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1020 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1022 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1023 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1024 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1025 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1026 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1027 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1032 static int adt7473_attach_adapter(struct i2c_adapter *adapter)
1034 if (!(adapter->class & I2C_CLASS_HWMON))
1036 return i2c_probe(adapter, &addr_data, adt7473_detect);
1039 static int adt7473_detect(struct i2c_adapter *adapter, int address, int kind)
1041 struct i2c_client *client;
1042 struct adt7473_data *data;
1045 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1048 data = kzalloc(sizeof(struct adt7473_data), GFP_KERNEL);
1054 client = &data->client;
1055 client->addr = address;
1056 client->adapter = adapter;
1057 client->driver = &adt7473_driver;
1059 i2c_set_clientdata(client, data);
1061 mutex_init(&data->lock);
1064 int vendor, device, revision;
1066 vendor = i2c_smbus_read_byte_data(client, ADT7473_REG_VENDOR);
1067 if (vendor != ADT7473_VENDOR) {
1072 device = i2c_smbus_read_byte_data(client, ADT7473_REG_DEVICE);
1073 if (device != ADT7473_DEVICE) {
1078 revision = i2c_smbus_read_byte_data(client,
1079 ADT7473_REG_REVISION);
1080 if (revision != ADT7473_REV_68 && revision != ADT7473_REV_69) {
1085 dev_dbg(&adapter->dev, "detection forced\n");
1087 strlcpy(client->name, "adt7473", I2C_NAME_SIZE);
1089 err = i2c_attach_client(client);
1093 dev_info(&client->dev, "%s chip found\n", client->name);
1095 /* Initialize the ADT7473 chip */
1096 adt7473_init_client(client);
1098 /* Register sysfs hooks */
1099 data->attrs.attrs = adt7473_attr;
1100 err = sysfs_create_group(&client->dev.kobj, &data->attrs);
1104 data->hwmon_dev = hwmon_device_register(&client->dev);
1105 if (IS_ERR(data->hwmon_dev)) {
1106 err = PTR_ERR(data->hwmon_dev);
1113 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1115 i2c_detach_client(client);
1122 static int adt7473_detach_client(struct i2c_client *client)
1124 struct adt7473_data *data = i2c_get_clientdata(client);
1126 hwmon_device_unregister(data->hwmon_dev);
1127 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1128 i2c_detach_client(client);
1133 static int __init adt7473_init(void)
1135 return i2c_add_driver(&adt7473_driver);
1138 static void __exit adt7473_exit(void)
1140 i2c_del_driver(&adt7473_driver);
1143 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1144 MODULE_DESCRIPTION("ADT7473 driver");
1145 MODULE_LICENSE("GPL");
1147 module_init(adt7473_init);
1148 module_exit(adt7473_exit);