2 * A hwmon driver for the Analog Devices ADT7470
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, 0x2E, 0x2F, I2C_CLIENT_END };
35 /* Insmod parameters */
36 I2C_CLIENT_INSMOD_1(adt7470);
38 /* ADT7470 registers */
39 #define ADT7470_REG_BASE_ADDR 0x20
40 #define ADT7470_REG_TEMP_BASE_ADDR 0x20
41 #define ADT7470_REG_TEMP_MAX_ADDR 0x29
42 #define ADT7470_REG_FAN_BASE_ADDR 0x2A
43 #define ADT7470_REG_FAN_MAX_ADDR 0x31
44 #define ADT7470_REG_PWM_BASE_ADDR 0x32
45 #define ADT7470_REG_PWM_MAX_ADDR 0x35
46 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
47 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
48 #define ADT7470_REG_CFG 0x40
49 #define ADT7470_FSPD_MASK 0x04
50 #define ADT7470_REG_ALARM1 0x41
51 #define ADT7470_R1T_ALARM 0x01
52 #define ADT7470_R2T_ALARM 0x02
53 #define ADT7470_R3T_ALARM 0x04
54 #define ADT7470_R4T_ALARM 0x08
55 #define ADT7470_R5T_ALARM 0x10
56 #define ADT7470_R6T_ALARM 0x20
57 #define ADT7470_R7T_ALARM 0x40
58 #define ADT7470_OOL_ALARM 0x80
59 #define ADT7470_REG_ALARM2 0x42
60 #define ADT7470_R8T_ALARM 0x01
61 #define ADT7470_R9T_ALARM 0x02
62 #define ADT7470_R10T_ALARM 0x04
63 #define ADT7470_FAN1_ALARM 0x10
64 #define ADT7470_FAN2_ALARM 0x20
65 #define ADT7470_FAN3_ALARM 0x40
66 #define ADT7470_FAN4_ALARM 0x80
67 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
68 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
69 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
70 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
71 #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
72 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
73 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
74 #define ADT7470_REG_PWM12_CFG 0x68
75 #define ADT7470_PWM2_AUTO_MASK 0x40
76 #define ADT7470_PWM1_AUTO_MASK 0x80
77 #define ADT7470_REG_PWM34_CFG 0x69
78 #define ADT7470_PWM3_AUTO_MASK 0x40
79 #define ADT7470_PWM4_AUTO_MASK 0x80
80 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
81 #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
82 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
83 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
84 #define ADT7470_REG_ACOUSTICS12 0x75
85 #define ADT7470_REG_ACOUSTICS34 0x76
86 #define ADT7470_REG_DEVICE 0x3D
87 #define ADT7470_REG_VENDOR 0x3E
88 #define ADT7470_REG_REVISION 0x3F
89 #define ADT7470_REG_ALARM1_MASK 0x72
90 #define ADT7470_REG_ALARM2_MASK 0x73
91 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
92 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
93 #define ADT7470_REG_MAX_ADDR 0x81
95 #define ADT7470_TEMP_COUNT 10
96 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
97 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
98 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
101 #define ADT7470_FAN_COUNT 4
102 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
103 #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
104 #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
106 #define ADT7470_PWM_COUNT 4
107 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
108 #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
109 #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
110 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
111 #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
112 #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
115 #define ALARM2(x) ((x) << 8)
117 #define ADT7470_VENDOR 0x41
118 #define ADT7470_DEVICE 0x70
119 /* datasheet only mentions a revision 2 */
120 #define ADT7470_REVISION 0x02
122 /* "all temps" according to hwmon sysfs interface spec */
123 #define ADT7470_PWM_ALL_TEMPS 0x3FF
125 /* How often do we reread sensors values? (In jiffies) */
126 #define SENSOR_REFRESH_INTERVAL (5 * HZ)
128 /* How often do we reread sensor limit values? (In jiffies) */
129 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
131 /* sleep 1s while gathering temperature data */
132 #define TEMP_COLLECTION_TIME 1000
134 /* datasheet says to divide this number by the fan reading to get fan rpm */
135 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
136 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
137 #define FAN_PERIOD_INVALID 65535
138 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
140 struct adt7470_data {
141 struct device *hwmon_dev;
142 struct attribute_group attrs;
146 unsigned long sensors_last_updated; /* In jiffies */
147 unsigned long limits_last_updated; /* In jiffies */
149 s8 temp[ADT7470_TEMP_COUNT];
150 s8 temp_min[ADT7470_TEMP_COUNT];
151 s8 temp_max[ADT7470_TEMP_COUNT];
152 u16 fan[ADT7470_FAN_COUNT];
153 u16 fan_min[ADT7470_FAN_COUNT];
154 u16 fan_max[ADT7470_FAN_COUNT];
158 u8 pwm[ADT7470_PWM_COUNT];
159 u8 pwm_max[ADT7470_PWM_COUNT];
160 u8 pwm_automatic[ADT7470_PWM_COUNT];
161 u8 pwm_min[ADT7470_PWM_COUNT];
162 s8 pwm_tmin[ADT7470_PWM_COUNT];
163 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
166 static int adt7470_probe(struct i2c_client *client,
167 const struct i2c_device_id *id);
168 static int adt7470_detect(struct i2c_client *client, int kind,
169 struct i2c_board_info *info);
170 static int adt7470_remove(struct i2c_client *client);
172 static const struct i2c_device_id adt7470_id[] = {
173 { "adt7470", adt7470 },
176 MODULE_DEVICE_TABLE(i2c, adt7470_id);
178 static struct i2c_driver adt7470_driver = {
179 .class = I2C_CLASS_HWMON,
183 .probe = adt7470_probe,
184 .remove = adt7470_remove,
185 .id_table = adt7470_id,
186 .detect = adt7470_detect,
187 .address_data = &addr_data,
191 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
192 * that the low byte must be read before the high byte.
194 static inline int adt7470_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 adt7470_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 adt7470_init_client(struct i2c_client *client)
211 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
214 dev_err(&client->dev, "cannot read configuration register\n");
216 /* start monitoring (and do a self-test) */
217 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
221 static struct adt7470_data *adt7470_update_device(struct device *dev)
223 struct i2c_client *client = to_i2c_client(dev);
224 struct adt7470_data *data = i2c_get_clientdata(client);
225 unsigned long local_jiffies = jiffies;
229 mutex_lock(&data->lock);
230 if (time_before(local_jiffies, data->sensors_last_updated +
231 SENSOR_REFRESH_INTERVAL)
232 && data->sensors_valid)
233 goto no_sensor_update;
235 /* start reading temperature sensors */
236 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
238 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
241 * Delay is 200ms * number of tmp05 sensors. Too bad
242 * there's no way to figure out how many are connected.
243 * For now, assume 1s will work.
245 msleep(TEMP_COLLECTION_TIME);
247 /* done reading temperature sensors */
248 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
250 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
252 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
253 data->temp[i] = i2c_smbus_read_byte_data(client,
254 ADT7470_TEMP_REG(i));
256 for (i = 0; i < ADT7470_FAN_COUNT; i++)
257 data->fan[i] = adt7470_read_word_data(client,
260 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
264 data->pwm[i] = i2c_smbus_read_byte_data(client,
268 reg_mask = ADT7470_PWM2_AUTO_MASK;
270 reg_mask = ADT7470_PWM1_AUTO_MASK;
272 reg = ADT7470_REG_PWM_CFG(i);
273 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
274 data->pwm_automatic[i] = 1;
276 data->pwm_automatic[i] = 0;
278 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
279 cfg = i2c_smbus_read_byte_data(client, reg);
281 data->pwm_auto_temp[i] = cfg >> 4;
283 data->pwm_auto_temp[i] = cfg & 0xF;
286 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
288 data->force_pwm_max = 1;
290 data->force_pwm_max = 0;
292 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
293 if (data->alarm & ADT7470_OOL_ALARM)
294 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
295 ADT7470_REG_ALARM2));
296 data->alarms_mask = adt7470_read_word_data(client,
297 ADT7470_REG_ALARM1_MASK);
299 data->sensors_last_updated = local_jiffies;
300 data->sensors_valid = 1;
303 if (time_before(local_jiffies, data->limits_last_updated +
304 LIMIT_REFRESH_INTERVAL)
305 && data->limits_valid)
308 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
309 data->temp_min[i] = i2c_smbus_read_byte_data(client,
310 ADT7470_TEMP_MIN_REG(i));
311 data->temp_max[i] = i2c_smbus_read_byte_data(client,
312 ADT7470_TEMP_MAX_REG(i));
315 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
316 data->fan_min[i] = adt7470_read_word_data(client,
317 ADT7470_REG_FAN_MIN(i));
318 data->fan_max[i] = adt7470_read_word_data(client,
319 ADT7470_REG_FAN_MAX(i));
322 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
323 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
324 ADT7470_REG_PWM_MAX(i));
325 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
326 ADT7470_REG_PWM_MIN(i));
327 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
328 ADT7470_REG_PWM_TMIN(i));
331 data->limits_last_updated = local_jiffies;
332 data->limits_valid = 1;
335 mutex_unlock(&data->lock);
339 static ssize_t show_temp_min(struct device *dev,
340 struct device_attribute *devattr,
343 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
344 struct adt7470_data *data = adt7470_update_device(dev);
345 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
348 static ssize_t set_temp_min(struct device *dev,
349 struct device_attribute *devattr,
353 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
354 struct i2c_client *client = to_i2c_client(dev);
355 struct adt7470_data *data = i2c_get_clientdata(client);
358 if (strict_strtol(buf, 10, &temp))
361 temp = DIV_ROUND_CLOSEST(temp, 1000);
362 temp = SENSORS_LIMIT(temp, 0, 255);
364 mutex_lock(&data->lock);
365 data->temp_min[attr->index] = temp;
366 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
368 mutex_unlock(&data->lock);
373 static ssize_t show_temp_max(struct device *dev,
374 struct device_attribute *devattr,
377 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
378 struct adt7470_data *data = adt7470_update_device(dev);
379 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
382 static ssize_t set_temp_max(struct device *dev,
383 struct device_attribute *devattr,
387 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
388 struct i2c_client *client = to_i2c_client(dev);
389 struct adt7470_data *data = i2c_get_clientdata(client);
392 if (strict_strtol(buf, 10, &temp))
395 temp = DIV_ROUND_CLOSEST(temp, 1000);
396 temp = SENSORS_LIMIT(temp, 0, 255);
398 mutex_lock(&data->lock);
399 data->temp_max[attr->index] = temp;
400 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
402 mutex_unlock(&data->lock);
407 static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
410 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
411 struct adt7470_data *data = adt7470_update_device(dev);
412 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
415 static ssize_t show_alarm_mask(struct device *dev,
416 struct device_attribute *devattr,
419 struct adt7470_data *data = adt7470_update_device(dev);
421 return sprintf(buf, "%x\n", data->alarms_mask);
424 static ssize_t show_fan_max(struct device *dev,
425 struct device_attribute *devattr,
428 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
429 struct adt7470_data *data = adt7470_update_device(dev);
431 if (FAN_DATA_VALID(data->fan_max[attr->index]))
432 return sprintf(buf, "%d\n",
433 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
435 return sprintf(buf, "0\n");
438 static ssize_t set_fan_max(struct device *dev,
439 struct device_attribute *devattr,
440 const char *buf, size_t count)
442 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
443 struct i2c_client *client = to_i2c_client(dev);
444 struct adt7470_data *data = i2c_get_clientdata(client);
447 if (strict_strtol(buf, 10, &temp) || !temp)
450 temp = FAN_RPM_TO_PERIOD(temp);
451 temp = SENSORS_LIMIT(temp, 1, 65534);
453 mutex_lock(&data->lock);
454 data->fan_max[attr->index] = temp;
455 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
456 mutex_unlock(&data->lock);
461 static ssize_t show_fan_min(struct device *dev,
462 struct device_attribute *devattr,
465 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
466 struct adt7470_data *data = adt7470_update_device(dev);
468 if (FAN_DATA_VALID(data->fan_min[attr->index]))
469 return sprintf(buf, "%d\n",
470 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
472 return sprintf(buf, "0\n");
475 static ssize_t set_fan_min(struct device *dev,
476 struct device_attribute *devattr,
477 const char *buf, size_t count)
479 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
480 struct i2c_client *client = to_i2c_client(dev);
481 struct adt7470_data *data = i2c_get_clientdata(client);
484 if (strict_strtol(buf, 10, &temp) || !temp)
487 temp = FAN_RPM_TO_PERIOD(temp);
488 temp = SENSORS_LIMIT(temp, 1, 65534);
490 mutex_lock(&data->lock);
491 data->fan_min[attr->index] = temp;
492 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
493 mutex_unlock(&data->lock);
498 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
501 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
502 struct adt7470_data *data = adt7470_update_device(dev);
504 if (FAN_DATA_VALID(data->fan[attr->index]))
505 return sprintf(buf, "%d\n",
506 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
508 return sprintf(buf, "0\n");
511 static ssize_t show_force_pwm_max(struct device *dev,
512 struct device_attribute *devattr,
515 struct adt7470_data *data = adt7470_update_device(dev);
516 return sprintf(buf, "%d\n", data->force_pwm_max);
519 static ssize_t set_force_pwm_max(struct device *dev,
520 struct device_attribute *devattr,
524 struct i2c_client *client = to_i2c_client(dev);
525 struct adt7470_data *data = i2c_get_clientdata(client);
529 if (strict_strtol(buf, 10, &temp))
532 mutex_lock(&data->lock);
533 data->force_pwm_max = temp;
534 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
536 reg |= ADT7470_FSPD_MASK;
538 reg &= ~ADT7470_FSPD_MASK;
539 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
540 mutex_unlock(&data->lock);
545 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
548 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
549 struct adt7470_data *data = adt7470_update_device(dev);
550 return sprintf(buf, "%d\n", data->pwm[attr->index]);
553 static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
554 const char *buf, size_t count)
556 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
557 struct i2c_client *client = to_i2c_client(dev);
558 struct adt7470_data *data = i2c_get_clientdata(client);
561 if (strict_strtol(buf, 10, &temp))
564 temp = SENSORS_LIMIT(temp, 0, 255);
566 mutex_lock(&data->lock);
567 data->pwm[attr->index] = temp;
568 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
569 mutex_unlock(&data->lock);
574 static ssize_t show_pwm_max(struct device *dev,
575 struct device_attribute *devattr,
578 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
579 struct adt7470_data *data = adt7470_update_device(dev);
580 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
583 static ssize_t set_pwm_max(struct device *dev,
584 struct device_attribute *devattr,
588 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
589 struct i2c_client *client = to_i2c_client(dev);
590 struct adt7470_data *data = i2c_get_clientdata(client);
593 if (strict_strtol(buf, 10, &temp))
596 temp = SENSORS_LIMIT(temp, 0, 255);
598 mutex_lock(&data->lock);
599 data->pwm_max[attr->index] = temp;
600 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
602 mutex_unlock(&data->lock);
607 static ssize_t show_pwm_min(struct device *dev,
608 struct device_attribute *devattr,
611 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
612 struct adt7470_data *data = adt7470_update_device(dev);
613 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
616 static ssize_t set_pwm_min(struct device *dev,
617 struct device_attribute *devattr,
621 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
622 struct i2c_client *client = to_i2c_client(dev);
623 struct adt7470_data *data = i2c_get_clientdata(client);
626 if (strict_strtol(buf, 10, &temp))
629 temp = SENSORS_LIMIT(temp, 0, 255);
631 mutex_lock(&data->lock);
632 data->pwm_min[attr->index] = temp;
633 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
635 mutex_unlock(&data->lock);
640 static ssize_t show_pwm_tmax(struct device *dev,
641 struct device_attribute *devattr,
644 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
645 struct adt7470_data *data = adt7470_update_device(dev);
646 /* the datasheet says that tmax = tmin + 20C */
647 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
650 static ssize_t show_pwm_tmin(struct device *dev,
651 struct device_attribute *devattr,
654 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
655 struct adt7470_data *data = adt7470_update_device(dev);
656 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
659 static ssize_t set_pwm_tmin(struct device *dev,
660 struct device_attribute *devattr,
664 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
665 struct i2c_client *client = to_i2c_client(dev);
666 struct adt7470_data *data = i2c_get_clientdata(client);
669 if (strict_strtol(buf, 10, &temp))
672 temp = DIV_ROUND_CLOSEST(temp, 1000);
673 temp = SENSORS_LIMIT(temp, 0, 255);
675 mutex_lock(&data->lock);
676 data->pwm_tmin[attr->index] = temp;
677 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
679 mutex_unlock(&data->lock);
684 static ssize_t show_pwm_auto(struct device *dev,
685 struct device_attribute *devattr,
688 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
689 struct adt7470_data *data = adt7470_update_device(dev);
690 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
693 static ssize_t set_pwm_auto(struct device *dev,
694 struct device_attribute *devattr,
698 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
699 struct i2c_client *client = to_i2c_client(dev);
700 struct adt7470_data *data = i2c_get_clientdata(client);
701 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
702 int pwm_auto_reg_mask;
706 if (strict_strtol(buf, 10, &temp))
710 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
712 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
714 if (temp != 2 && temp != 1)
718 mutex_lock(&data->lock);
719 data->pwm_automatic[attr->index] = temp;
720 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
722 reg |= pwm_auto_reg_mask;
724 reg &= ~pwm_auto_reg_mask;
725 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
726 mutex_unlock(&data->lock);
731 static ssize_t show_pwm_auto_temp(struct device *dev,
732 struct device_attribute *devattr,
735 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
736 struct adt7470_data *data = adt7470_update_device(dev);
737 u8 ctrl = data->pwm_auto_temp[attr->index];
740 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
742 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
745 static int cvt_auto_temp(int input)
747 if (input == ADT7470_PWM_ALL_TEMPS)
749 if (input < 1 || !is_power_of_2(input))
751 return ilog2(input) + 1;
754 static ssize_t set_pwm_auto_temp(struct device *dev,
755 struct device_attribute *devattr,
759 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
760 struct i2c_client *client = to_i2c_client(dev);
761 struct adt7470_data *data = i2c_get_clientdata(client);
762 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
766 if (strict_strtol(buf, 10, &temp))
769 temp = cvt_auto_temp(temp);
773 mutex_lock(&data->lock);
774 data->pwm_automatic[attr->index] = temp;
775 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
777 if (!(attr->index % 2)) {
779 reg |= (temp << 4) & 0xF0;
785 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
786 mutex_unlock(&data->lock);
791 static ssize_t show_alarm(struct device *dev,
792 struct device_attribute *devattr,
795 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
796 struct adt7470_data *data = adt7470_update_device(dev);
798 if (data->alarm & attr->index)
799 return sprintf(buf, "1\n");
801 return sprintf(buf, "0\n");
804 static DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarm_mask, NULL);
806 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
808 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
810 static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
812 static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
814 static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
816 static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
818 static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
820 static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
822 static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
824 static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
827 static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
829 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
831 static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
833 static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
835 static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
837 static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
839 static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
841 static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
843 static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
845 static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
848 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
849 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
850 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
851 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
852 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
853 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
854 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
855 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
856 static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
857 static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
859 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL,
861 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL,
863 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL,
865 static SENSOR_DEVICE_ATTR(temp4_alarm, S_IRUGO, show_alarm, NULL,
867 static SENSOR_DEVICE_ATTR(temp5_alarm, S_IRUGO, show_alarm, NULL,
869 static SENSOR_DEVICE_ATTR(temp6_alarm, S_IRUGO, show_alarm, NULL,
871 static SENSOR_DEVICE_ATTR(temp7_alarm, S_IRUGO, show_alarm, NULL,
873 static SENSOR_DEVICE_ATTR(temp8_alarm, S_IRUGO, show_alarm, NULL,
874 ALARM2(ADT7470_R8T_ALARM));
875 static SENSOR_DEVICE_ATTR(temp9_alarm, S_IRUGO, show_alarm, NULL,
876 ALARM2(ADT7470_R9T_ALARM));
877 static SENSOR_DEVICE_ATTR(temp10_alarm, S_IRUGO, show_alarm, NULL,
878 ALARM2(ADT7470_R10T_ALARM));
880 static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
882 static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
884 static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
886 static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
889 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
891 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
893 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
895 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
898 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
899 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
900 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
901 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
903 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL,
904 ALARM2(ADT7470_FAN1_ALARM));
905 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL,
906 ALARM2(ADT7470_FAN2_ALARM));
907 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL,
908 ALARM2(ADT7470_FAN3_ALARM));
909 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL,
910 ALARM2(ADT7470_FAN4_ALARM));
912 static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
913 show_force_pwm_max, set_force_pwm_max, 0);
915 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
916 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
917 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
918 static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
920 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
921 show_pwm_min, set_pwm_min, 0);
922 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
923 show_pwm_min, set_pwm_min, 1);
924 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
925 show_pwm_min, set_pwm_min, 2);
926 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
927 show_pwm_min, set_pwm_min, 3);
929 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
930 show_pwm_max, set_pwm_max, 0);
931 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
932 show_pwm_max, set_pwm_max, 1);
933 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
934 show_pwm_max, set_pwm_max, 2);
935 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
936 show_pwm_max, set_pwm_max, 3);
938 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
939 show_pwm_tmin, set_pwm_tmin, 0);
940 static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
941 show_pwm_tmin, set_pwm_tmin, 1);
942 static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
943 show_pwm_tmin, set_pwm_tmin, 2);
944 static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
945 show_pwm_tmin, set_pwm_tmin, 3);
947 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
949 static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
951 static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
953 static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
956 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
958 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
960 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
962 static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
965 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
966 show_pwm_auto_temp, set_pwm_auto_temp, 0);
967 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
968 show_pwm_auto_temp, set_pwm_auto_temp, 1);
969 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
970 show_pwm_auto_temp, set_pwm_auto_temp, 2);
971 static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
972 show_pwm_auto_temp, set_pwm_auto_temp, 3);
974 static struct attribute *adt7470_attr[] =
976 &dev_attr_alarm_mask.attr,
977 &sensor_dev_attr_temp1_max.dev_attr.attr,
978 &sensor_dev_attr_temp2_max.dev_attr.attr,
979 &sensor_dev_attr_temp3_max.dev_attr.attr,
980 &sensor_dev_attr_temp4_max.dev_attr.attr,
981 &sensor_dev_attr_temp5_max.dev_attr.attr,
982 &sensor_dev_attr_temp6_max.dev_attr.attr,
983 &sensor_dev_attr_temp7_max.dev_attr.attr,
984 &sensor_dev_attr_temp8_max.dev_attr.attr,
985 &sensor_dev_attr_temp9_max.dev_attr.attr,
986 &sensor_dev_attr_temp10_max.dev_attr.attr,
987 &sensor_dev_attr_temp1_min.dev_attr.attr,
988 &sensor_dev_attr_temp2_min.dev_attr.attr,
989 &sensor_dev_attr_temp3_min.dev_attr.attr,
990 &sensor_dev_attr_temp4_min.dev_attr.attr,
991 &sensor_dev_attr_temp5_min.dev_attr.attr,
992 &sensor_dev_attr_temp6_min.dev_attr.attr,
993 &sensor_dev_attr_temp7_min.dev_attr.attr,
994 &sensor_dev_attr_temp8_min.dev_attr.attr,
995 &sensor_dev_attr_temp9_min.dev_attr.attr,
996 &sensor_dev_attr_temp10_min.dev_attr.attr,
997 &sensor_dev_attr_temp1_input.dev_attr.attr,
998 &sensor_dev_attr_temp2_input.dev_attr.attr,
999 &sensor_dev_attr_temp3_input.dev_attr.attr,
1000 &sensor_dev_attr_temp4_input.dev_attr.attr,
1001 &sensor_dev_attr_temp5_input.dev_attr.attr,
1002 &sensor_dev_attr_temp6_input.dev_attr.attr,
1003 &sensor_dev_attr_temp7_input.dev_attr.attr,
1004 &sensor_dev_attr_temp8_input.dev_attr.attr,
1005 &sensor_dev_attr_temp9_input.dev_attr.attr,
1006 &sensor_dev_attr_temp10_input.dev_attr.attr,
1007 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1008 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1009 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1010 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1011 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1012 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1013 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1014 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1015 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1016 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1017 &sensor_dev_attr_fan1_max.dev_attr.attr,
1018 &sensor_dev_attr_fan2_max.dev_attr.attr,
1019 &sensor_dev_attr_fan3_max.dev_attr.attr,
1020 &sensor_dev_attr_fan4_max.dev_attr.attr,
1021 &sensor_dev_attr_fan1_min.dev_attr.attr,
1022 &sensor_dev_attr_fan2_min.dev_attr.attr,
1023 &sensor_dev_attr_fan3_min.dev_attr.attr,
1024 &sensor_dev_attr_fan4_min.dev_attr.attr,
1025 &sensor_dev_attr_fan1_input.dev_attr.attr,
1026 &sensor_dev_attr_fan2_input.dev_attr.attr,
1027 &sensor_dev_attr_fan3_input.dev_attr.attr,
1028 &sensor_dev_attr_fan4_input.dev_attr.attr,
1029 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1030 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1031 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1032 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1033 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1034 &sensor_dev_attr_pwm1.dev_attr.attr,
1035 &sensor_dev_attr_pwm2.dev_attr.attr,
1036 &sensor_dev_attr_pwm3.dev_attr.attr,
1037 &sensor_dev_attr_pwm4.dev_attr.attr,
1038 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1039 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1040 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1041 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1042 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1043 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1044 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1045 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1046 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1047 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1048 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1049 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1050 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1051 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1052 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1053 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1054 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1055 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1056 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1057 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1058 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1059 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1060 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1061 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1065 /* Return 0 if detection is successful, -ENODEV otherwise */
1066 static int adt7470_detect(struct i2c_client *client, int kind,
1067 struct i2c_board_info *info)
1069 struct i2c_adapter *adapter = client->adapter;
1071 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1075 int vendor, device, revision;
1077 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1078 if (vendor != ADT7470_VENDOR)
1081 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1082 if (device != ADT7470_DEVICE)
1085 revision = i2c_smbus_read_byte_data(client,
1086 ADT7470_REG_REVISION);
1087 if (revision != ADT7470_REVISION)
1090 dev_dbg(&adapter->dev, "detection forced\n");
1092 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1097 static int adt7470_probe(struct i2c_client *client,
1098 const struct i2c_device_id *id)
1100 struct adt7470_data *data;
1103 data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL);
1109 i2c_set_clientdata(client, data);
1110 mutex_init(&data->lock);
1112 dev_info(&client->dev, "%s chip found\n", client->name);
1114 /* Initialize the ADT7470 chip */
1115 adt7470_init_client(client);
1117 /* Register sysfs hooks */
1118 data->attrs.attrs = adt7470_attr;
1119 if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
1122 data->hwmon_dev = hwmon_device_register(&client->dev);
1123 if (IS_ERR(data->hwmon_dev)) {
1124 err = PTR_ERR(data->hwmon_dev);
1131 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1138 static int adt7470_remove(struct i2c_client *client)
1140 struct adt7470_data *data = i2c_get_clientdata(client);
1142 hwmon_device_unregister(data->hwmon_dev);
1143 sysfs_remove_group(&client->dev.kobj, &data->attrs);
1148 static int __init adt7470_init(void)
1150 return i2c_add_driver(&adt7470_driver);
1153 static void __exit adt7470_exit(void)
1155 i2c_del_driver(&adt7470_driver);
1158 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1159 MODULE_DESCRIPTION("ADT7470 driver");
1160 MODULE_LICENSE("GPL");
1162 module_init(adt7470_init);
1163 module_exit(adt7470_exit);