2 * A hwmon driver for the Analog Devices ADT7470
3 * Copyright (C) 2007 IBM
5 * Author: Darrick J. Wong <darrick.wong@oracle.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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24 #include <linux/module.h>
25 #include <linux/jiffies.h>
26 #include <linux/i2c.h>
27 #include <linux/hwmon.h>
28 #include <linux/hwmon-sysfs.h>
29 #include <linux/err.h>
30 #include <linux/mutex.h>
31 #include <linux/delay.h>
32 #include <linux/log2.h>
33 #include <linux/kthread.h>
34 #include <linux/slab.h>
35 #include <linux/util_macros.h>
37 /* Addresses to scan */
38 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
40 /* ADT7470 registers */
41 #define ADT7470_REG_BASE_ADDR 0x20
42 #define ADT7470_REG_TEMP_BASE_ADDR 0x20
43 #define ADT7470_REG_TEMP_MAX_ADDR 0x29
44 #define ADT7470_REG_FAN_BASE_ADDR 0x2A
45 #define ADT7470_REG_FAN_MAX_ADDR 0x31
46 #define ADT7470_REG_PWM_BASE_ADDR 0x32
47 #define ADT7470_REG_PWM_MAX_ADDR 0x35
48 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
49 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
50 #define ADT7470_REG_CFG 0x40
51 #define ADT7470_FSPD_MASK 0x04
52 #define ADT7470_REG_ALARM1 0x41
53 #define ADT7470_R1T_ALARM 0x01
54 #define ADT7470_R2T_ALARM 0x02
55 #define ADT7470_R3T_ALARM 0x04
56 #define ADT7470_R4T_ALARM 0x08
57 #define ADT7470_R5T_ALARM 0x10
58 #define ADT7470_R6T_ALARM 0x20
59 #define ADT7470_R7T_ALARM 0x40
60 #define ADT7470_OOL_ALARM 0x80
61 #define ADT7470_REG_ALARM2 0x42
62 #define ADT7470_R8T_ALARM 0x01
63 #define ADT7470_R9T_ALARM 0x02
64 #define ADT7470_R10T_ALARM 0x04
65 #define ADT7470_FAN1_ALARM 0x10
66 #define ADT7470_FAN2_ALARM 0x20
67 #define ADT7470_FAN3_ALARM 0x40
68 #define ADT7470_FAN4_ALARM 0x80
69 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
70 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
71 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
72 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
73 #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
74 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
75 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
76 #define ADT7470_REG_PWM12_CFG 0x68
77 #define ADT7470_PWM2_AUTO_MASK 0x40
78 #define ADT7470_PWM1_AUTO_MASK 0x80
79 #define ADT7470_PWM_AUTO_MASK 0xC0
80 #define ADT7470_REG_PWM34_CFG 0x69
81 #define ADT7470_PWM3_AUTO_MASK 0x40
82 #define ADT7470_PWM4_AUTO_MASK 0x80
83 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
84 #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
85 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
86 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
87 #define ADT7470_REG_CFG_2 0x74
88 #define ADT7470_REG_ACOUSTICS12 0x75
89 #define ADT7470_REG_ACOUSTICS34 0x76
90 #define ADT7470_REG_DEVICE 0x3D
91 #define ADT7470_REG_VENDOR 0x3E
92 #define ADT7470_REG_REVISION 0x3F
93 #define ADT7470_REG_ALARM1_MASK 0x72
94 #define ADT7470_REG_ALARM2_MASK 0x73
95 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
96 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
97 #define ADT7470_REG_MAX_ADDR 0x81
99 #define ADT7470_TEMP_COUNT 10
100 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
101 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
102 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
105 #define ADT7470_FAN_COUNT 4
106 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
107 #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
108 #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
110 #define ADT7470_PWM_COUNT 4
111 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
112 #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
113 #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
114 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
115 #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
116 #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
119 #define ALARM2(x) ((x) << 8)
121 #define ADT7470_VENDOR 0x41
122 #define ADT7470_DEVICE 0x70
123 /* datasheet only mentions a revision 2 */
124 #define ADT7470_REVISION 0x02
126 /* "all temps" according to hwmon sysfs interface spec */
127 #define ADT7470_PWM_ALL_TEMPS 0x3FF
129 /* How often do we reread sensors values? (In jiffies) */
130 #define SENSOR_REFRESH_INTERVAL (5 * HZ)
132 /* How often do we reread sensor limit values? (In jiffies) */
133 #define LIMIT_REFRESH_INTERVAL (60 * HZ)
135 /* Wait at least 200ms per sensor for 10 sensors */
136 #define TEMP_COLLECTION_TIME 2000
138 /* auto update thing won't fire more than every 2s */
139 #define AUTO_UPDATE_INTERVAL 2000
141 /* datasheet says to divide this number by the fan reading to get fan rpm */
142 #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
143 #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
144 #define FAN_PERIOD_INVALID 65535
145 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
147 /* Config registers 1 and 2 include fields for selecting the PWM frequency */
148 #define ADT7470_CFG_LF 0x40
149 #define ADT7470_FREQ_MASK 0x70
150 #define ADT7470_FREQ_SHIFT 4
152 struct adt7470_data {
153 struct i2c_client *client;
157 unsigned long sensors_last_updated; /* In jiffies */
158 unsigned long limits_last_updated; /* In jiffies */
160 int num_temp_sensors; /* -1 = probe */
161 int temperatures_probed;
163 s8 temp[ADT7470_TEMP_COUNT];
164 s8 temp_min[ADT7470_TEMP_COUNT];
165 s8 temp_max[ADT7470_TEMP_COUNT];
166 u16 fan[ADT7470_FAN_COUNT];
167 u16 fan_min[ADT7470_FAN_COUNT];
168 u16 fan_max[ADT7470_FAN_COUNT];
172 u8 pwm[ADT7470_PWM_COUNT];
173 u8 pwm_max[ADT7470_PWM_COUNT];
174 u8 pwm_automatic[ADT7470_PWM_COUNT];
175 u8 pwm_min[ADT7470_PWM_COUNT];
176 s8 pwm_tmin[ADT7470_PWM_COUNT];
177 u8 pwm_auto_temp[ADT7470_PWM_COUNT];
179 struct task_struct *auto_update;
180 unsigned int auto_update_interval;
184 * 16-bit registers on the ADT7470 are low-byte first. The data sheet says
185 * that the low byte must be read before the high byte.
187 static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
190 foo = i2c_smbus_read_byte_data(client, reg);
191 foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
195 static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
198 return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
199 || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
202 /* Probe for temperature sensors. Assumes lock is held */
203 static int adt7470_read_temperatures(struct i2c_client *client,
204 struct adt7470_data *data)
208 u8 cfg, pwm[4], pwm_cfg[2];
210 /* save pwm[1-4] config register */
211 pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
212 pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
214 /* set manual pwm to whatever it is set to now */
215 for (i = 0; i < ADT7470_FAN_COUNT; i++)
216 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
218 /* put pwm in manual mode */
219 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
220 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
221 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
222 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
224 /* write pwm control to whatever it was */
225 for (i = 0; i < ADT7470_FAN_COUNT; i++)
226 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
228 /* start reading temperature sensors */
229 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
231 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
233 /* Delay is 200ms * number of temp sensors. */
234 res = msleep_interruptible((data->num_temp_sensors >= 0 ?
235 data->num_temp_sensors * 200 :
236 TEMP_COLLECTION_TIME));
238 /* done reading temperature sensors */
239 cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
241 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
243 /* restore pwm[1-4] config registers */
244 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
245 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
248 pr_err("ha ha, interrupted\n");
252 /* Only count fans if we have to */
253 if (data->num_temp_sensors >= 0)
256 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
257 data->temp[i] = i2c_smbus_read_byte_data(client,
258 ADT7470_TEMP_REG(i));
260 data->num_temp_sensors = i + 1;
262 data->temperatures_probed = 1;
266 static int adt7470_update_thread(void *p)
268 struct i2c_client *client = p;
269 struct adt7470_data *data = i2c_get_clientdata(client);
271 while (!kthread_should_stop()) {
272 mutex_lock(&data->lock);
273 adt7470_read_temperatures(client, data);
274 mutex_unlock(&data->lock);
276 set_current_state(TASK_INTERRUPTIBLE);
277 if (kthread_should_stop())
280 schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
286 static struct adt7470_data *adt7470_update_device(struct device *dev)
288 struct adt7470_data *data = dev_get_drvdata(dev);
289 struct i2c_client *client = data->client;
290 unsigned long local_jiffies = jiffies;
293 int need_sensors = 1;
297 * Figure out if we need to update the shadow registers.
298 * Lockless means that we may occasionally report out of
301 if (time_before(local_jiffies, data->sensors_last_updated +
302 SENSOR_REFRESH_INTERVAL) &&
306 if (time_before(local_jiffies, data->limits_last_updated +
307 LIMIT_REFRESH_INTERVAL) &&
311 if (!need_sensors && !need_limits)
314 mutex_lock(&data->lock);
316 goto no_sensor_update;
318 if (!data->temperatures_probed)
319 adt7470_read_temperatures(client, data);
321 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
322 data->temp[i] = i2c_smbus_read_byte_data(client,
323 ADT7470_TEMP_REG(i));
325 for (i = 0; i < ADT7470_FAN_COUNT; i++)
326 data->fan[i] = adt7470_read_word_data(client,
329 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
333 data->pwm[i] = i2c_smbus_read_byte_data(client,
337 reg_mask = ADT7470_PWM2_AUTO_MASK;
339 reg_mask = ADT7470_PWM1_AUTO_MASK;
341 reg = ADT7470_REG_PWM_CFG(i);
342 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
343 data->pwm_automatic[i] = 1;
345 data->pwm_automatic[i] = 0;
347 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
348 cfg = i2c_smbus_read_byte_data(client, reg);
350 data->pwm_auto_temp[i] = cfg >> 4;
352 data->pwm_auto_temp[i] = cfg & 0xF;
355 if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
357 data->force_pwm_max = 1;
359 data->force_pwm_max = 0;
361 data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
362 if (data->alarm & ADT7470_OOL_ALARM)
363 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
364 ADT7470_REG_ALARM2));
365 data->alarms_mask = adt7470_read_word_data(client,
366 ADT7470_REG_ALARM1_MASK);
368 data->sensors_last_updated = local_jiffies;
369 data->sensors_valid = 1;
375 for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
376 data->temp_min[i] = i2c_smbus_read_byte_data(client,
377 ADT7470_TEMP_MIN_REG(i));
378 data->temp_max[i] = i2c_smbus_read_byte_data(client,
379 ADT7470_TEMP_MAX_REG(i));
382 for (i = 0; i < ADT7470_FAN_COUNT; i++) {
383 data->fan_min[i] = adt7470_read_word_data(client,
384 ADT7470_REG_FAN_MIN(i));
385 data->fan_max[i] = adt7470_read_word_data(client,
386 ADT7470_REG_FAN_MAX(i));
389 for (i = 0; i < ADT7470_PWM_COUNT; i++) {
390 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
391 ADT7470_REG_PWM_MAX(i));
392 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
393 ADT7470_REG_PWM_MIN(i));
394 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
395 ADT7470_REG_PWM_TMIN(i));
398 data->limits_last_updated = local_jiffies;
399 data->limits_valid = 1;
402 mutex_unlock(&data->lock);
406 static ssize_t auto_update_interval_show(struct device *dev,
407 struct device_attribute *devattr,
410 struct adt7470_data *data = adt7470_update_device(dev);
411 return sprintf(buf, "%d\n", data->auto_update_interval);
414 static ssize_t auto_update_interval_store(struct device *dev,
415 struct device_attribute *devattr,
416 const char *buf, size_t count)
418 struct adt7470_data *data = dev_get_drvdata(dev);
421 if (kstrtol(buf, 10, &temp))
424 temp = clamp_val(temp, 0, 60000);
426 mutex_lock(&data->lock);
427 data->auto_update_interval = temp;
428 mutex_unlock(&data->lock);
433 static ssize_t num_temp_sensors_show(struct device *dev,
434 struct device_attribute *devattr,
437 struct adt7470_data *data = adt7470_update_device(dev);
438 return sprintf(buf, "%d\n", data->num_temp_sensors);
441 static ssize_t num_temp_sensors_store(struct device *dev,
442 struct device_attribute *devattr,
443 const char *buf, size_t count)
445 struct adt7470_data *data = dev_get_drvdata(dev);
448 if (kstrtol(buf, 10, &temp))
451 temp = clamp_val(temp, -1, 10);
453 mutex_lock(&data->lock);
454 data->num_temp_sensors = temp;
456 data->temperatures_probed = 0;
457 mutex_unlock(&data->lock);
462 static ssize_t temp_min_show(struct device *dev,
463 struct device_attribute *devattr, char *buf)
465 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
466 struct adt7470_data *data = adt7470_update_device(dev);
467 return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
470 static ssize_t temp_min_store(struct device *dev,
471 struct device_attribute *devattr,
472 const char *buf, size_t count)
474 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
475 struct adt7470_data *data = dev_get_drvdata(dev);
476 struct i2c_client *client = data->client;
479 if (kstrtol(buf, 10, &temp))
482 temp = clamp_val(temp, -128000, 127000);
483 temp = DIV_ROUND_CLOSEST(temp, 1000);
485 mutex_lock(&data->lock);
486 data->temp_min[attr->index] = temp;
487 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
489 mutex_unlock(&data->lock);
494 static ssize_t temp_max_show(struct device *dev,
495 struct device_attribute *devattr, char *buf)
497 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
498 struct adt7470_data *data = adt7470_update_device(dev);
499 return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
502 static ssize_t temp_max_store(struct device *dev,
503 struct device_attribute *devattr,
504 const char *buf, size_t count)
506 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
507 struct adt7470_data *data = dev_get_drvdata(dev);
508 struct i2c_client *client = data->client;
511 if (kstrtol(buf, 10, &temp))
514 temp = clamp_val(temp, -128000, 127000);
515 temp = DIV_ROUND_CLOSEST(temp, 1000);
517 mutex_lock(&data->lock);
518 data->temp_max[attr->index] = temp;
519 i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
521 mutex_unlock(&data->lock);
526 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
529 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
530 struct adt7470_data *data = adt7470_update_device(dev);
531 return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
534 static ssize_t alarm_mask_show(struct device *dev,
535 struct device_attribute *devattr,
538 struct adt7470_data *data = adt7470_update_device(dev);
540 return sprintf(buf, "%x\n", data->alarms_mask);
543 static ssize_t alarm_mask_store(struct device *dev,
544 struct device_attribute *devattr,
545 const char *buf, size_t count)
547 struct adt7470_data *data = dev_get_drvdata(dev);
550 if (kstrtoul(buf, 0, &mask))
556 mutex_lock(&data->lock);
557 data->alarms_mask = mask;
558 adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
559 mutex_unlock(&data->lock);
564 static ssize_t fan_max_show(struct device *dev,
565 struct device_attribute *devattr, char *buf)
567 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
568 struct adt7470_data *data = adt7470_update_device(dev);
570 if (FAN_DATA_VALID(data->fan_max[attr->index]))
571 return sprintf(buf, "%d\n",
572 FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
574 return sprintf(buf, "0\n");
577 static ssize_t fan_max_store(struct device *dev,
578 struct device_attribute *devattr,
579 const char *buf, size_t count)
581 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
582 struct adt7470_data *data = dev_get_drvdata(dev);
583 struct i2c_client *client = data->client;
586 if (kstrtol(buf, 10, &temp) || !temp)
589 temp = FAN_RPM_TO_PERIOD(temp);
590 temp = clamp_val(temp, 1, 65534);
592 mutex_lock(&data->lock);
593 data->fan_max[attr->index] = temp;
594 adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
595 mutex_unlock(&data->lock);
600 static ssize_t fan_min_show(struct device *dev,
601 struct device_attribute *devattr, char *buf)
603 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
604 struct adt7470_data *data = adt7470_update_device(dev);
606 if (FAN_DATA_VALID(data->fan_min[attr->index]))
607 return sprintf(buf, "%d\n",
608 FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
610 return sprintf(buf, "0\n");
613 static ssize_t fan_min_store(struct device *dev,
614 struct device_attribute *devattr,
615 const char *buf, size_t count)
617 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
618 struct adt7470_data *data = dev_get_drvdata(dev);
619 struct i2c_client *client = data->client;
622 if (kstrtol(buf, 10, &temp) || !temp)
625 temp = FAN_RPM_TO_PERIOD(temp);
626 temp = clamp_val(temp, 1, 65534);
628 mutex_lock(&data->lock);
629 data->fan_min[attr->index] = temp;
630 adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
631 mutex_unlock(&data->lock);
636 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
639 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
640 struct adt7470_data *data = adt7470_update_device(dev);
642 if (FAN_DATA_VALID(data->fan[attr->index]))
643 return sprintf(buf, "%d\n",
644 FAN_PERIOD_TO_RPM(data->fan[attr->index]));
646 return sprintf(buf, "0\n");
649 static ssize_t force_pwm_max_show(struct device *dev,
650 struct device_attribute *devattr, char *buf)
652 struct adt7470_data *data = adt7470_update_device(dev);
653 return sprintf(buf, "%d\n", data->force_pwm_max);
656 static ssize_t force_pwm_max_store(struct device *dev,
657 struct device_attribute *devattr,
658 const char *buf, size_t count)
660 struct adt7470_data *data = dev_get_drvdata(dev);
661 struct i2c_client *client = data->client;
665 if (kstrtol(buf, 10, &temp))
668 mutex_lock(&data->lock);
669 data->force_pwm_max = temp;
670 reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
672 reg |= ADT7470_FSPD_MASK;
674 reg &= ~ADT7470_FSPD_MASK;
675 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
676 mutex_unlock(&data->lock);
681 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
684 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
685 struct adt7470_data *data = adt7470_update_device(dev);
686 return sprintf(buf, "%d\n", data->pwm[attr->index]);
689 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
690 const char *buf, size_t count)
692 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
693 struct adt7470_data *data = dev_get_drvdata(dev);
694 struct i2c_client *client = data->client;
697 if (kstrtol(buf, 10, &temp))
700 temp = clamp_val(temp, 0, 255);
702 mutex_lock(&data->lock);
703 data->pwm[attr->index] = temp;
704 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
705 mutex_unlock(&data->lock);
710 /* These are the valid PWM frequencies to the nearest Hz */
711 static const int adt7470_freq_map[] = {
712 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
715 static ssize_t pwm1_freq_show(struct device *dev,
716 struct device_attribute *devattr, char *buf)
718 struct adt7470_data *data = adt7470_update_device(dev);
719 unsigned char cfg_reg_1;
720 unsigned char cfg_reg_2;
723 mutex_lock(&data->lock);
724 cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
725 cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
726 mutex_unlock(&data->lock);
728 index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
729 if (!(cfg_reg_1 & ADT7470_CFG_LF))
731 if (index >= ARRAY_SIZE(adt7470_freq_map))
732 index = ARRAY_SIZE(adt7470_freq_map) - 1;
734 return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
737 static ssize_t pwm1_freq_store(struct device *dev,
738 struct device_attribute *devattr,
739 const char *buf, size_t count)
741 struct adt7470_data *data = dev_get_drvdata(dev);
742 struct i2c_client *client = data->client;
745 int low_freq = ADT7470_CFG_LF;
748 if (kstrtol(buf, 10, &freq))
751 /* Round the user value given to the closest available frequency */
752 index = find_closest(freq, adt7470_freq_map,
753 ARRAY_SIZE(adt7470_freq_map));
760 mutex_lock(&data->lock);
761 /* Configuration Register 1 */
762 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
763 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
764 (val & ~ADT7470_CFG_LF) | low_freq);
765 /* Configuration Register 2 */
766 val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
767 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
768 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
769 mutex_unlock(&data->lock);
774 static ssize_t pwm_max_show(struct device *dev,
775 struct device_attribute *devattr, char *buf)
777 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
778 struct adt7470_data *data = adt7470_update_device(dev);
779 return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
782 static ssize_t pwm_max_store(struct device *dev,
783 struct device_attribute *devattr,
784 const char *buf, size_t count)
786 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
787 struct adt7470_data *data = dev_get_drvdata(dev);
788 struct i2c_client *client = data->client;
791 if (kstrtol(buf, 10, &temp))
794 temp = clamp_val(temp, 0, 255);
796 mutex_lock(&data->lock);
797 data->pwm_max[attr->index] = temp;
798 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
800 mutex_unlock(&data->lock);
805 static ssize_t pwm_min_show(struct device *dev,
806 struct device_attribute *devattr, char *buf)
808 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
809 struct adt7470_data *data = adt7470_update_device(dev);
810 return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
813 static ssize_t pwm_min_store(struct device *dev,
814 struct device_attribute *devattr,
815 const char *buf, size_t count)
817 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
818 struct adt7470_data *data = dev_get_drvdata(dev);
819 struct i2c_client *client = data->client;
822 if (kstrtol(buf, 10, &temp))
825 temp = clamp_val(temp, 0, 255);
827 mutex_lock(&data->lock);
828 data->pwm_min[attr->index] = temp;
829 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
831 mutex_unlock(&data->lock);
836 static ssize_t pwm_tmax_show(struct device *dev,
837 struct device_attribute *devattr, char *buf)
839 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
840 struct adt7470_data *data = adt7470_update_device(dev);
841 /* the datasheet says that tmax = tmin + 20C */
842 return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
845 static ssize_t pwm_tmin_show(struct device *dev,
846 struct device_attribute *devattr, char *buf)
848 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
849 struct adt7470_data *data = adt7470_update_device(dev);
850 return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
853 static ssize_t pwm_tmin_store(struct device *dev,
854 struct device_attribute *devattr,
855 const char *buf, size_t count)
857 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
858 struct adt7470_data *data = dev_get_drvdata(dev);
859 struct i2c_client *client = data->client;
862 if (kstrtol(buf, 10, &temp))
865 temp = clamp_val(temp, -128000, 127000);
866 temp = DIV_ROUND_CLOSEST(temp, 1000);
868 mutex_lock(&data->lock);
869 data->pwm_tmin[attr->index] = temp;
870 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
872 mutex_unlock(&data->lock);
877 static ssize_t pwm_auto_show(struct device *dev,
878 struct device_attribute *devattr, char *buf)
880 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
881 struct adt7470_data *data = adt7470_update_device(dev);
882 return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
885 static ssize_t pwm_auto_store(struct device *dev,
886 struct device_attribute *devattr,
887 const char *buf, size_t count)
889 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
890 struct adt7470_data *data = dev_get_drvdata(dev);
891 struct i2c_client *client = data->client;
892 int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
893 int pwm_auto_reg_mask;
897 if (kstrtol(buf, 10, &temp))
901 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
903 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
905 if (temp != 2 && temp != 1)
909 mutex_lock(&data->lock);
910 data->pwm_automatic[attr->index] = temp;
911 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
913 reg |= pwm_auto_reg_mask;
915 reg &= ~pwm_auto_reg_mask;
916 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
917 mutex_unlock(&data->lock);
922 static ssize_t pwm_auto_temp_show(struct device *dev,
923 struct device_attribute *devattr, char *buf)
925 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
926 struct adt7470_data *data = adt7470_update_device(dev);
927 u8 ctrl = data->pwm_auto_temp[attr->index];
930 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
932 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
935 static int cvt_auto_temp(int input)
937 if (input == ADT7470_PWM_ALL_TEMPS)
939 if (input < 1 || !is_power_of_2(input))
941 return ilog2(input) + 1;
944 static ssize_t pwm_auto_temp_store(struct device *dev,
945 struct device_attribute *devattr,
946 const char *buf, size_t count)
948 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
949 struct adt7470_data *data = dev_get_drvdata(dev);
950 struct i2c_client *client = data->client;
951 int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
955 if (kstrtol(buf, 10, &temp))
958 temp = cvt_auto_temp(temp);
962 mutex_lock(&data->lock);
963 data->pwm_automatic[attr->index] = temp;
964 reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
966 if (!(attr->index % 2)) {
968 reg |= (temp << 4) & 0xF0;
974 i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
975 mutex_unlock(&data->lock);
980 static ssize_t alarm_show(struct device *dev,
981 struct device_attribute *devattr, char *buf)
983 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
984 struct adt7470_data *data = adt7470_update_device(dev);
986 if (data->alarm & attr->index)
987 return sprintf(buf, "1\n");
989 return sprintf(buf, "0\n");
992 static DEVICE_ATTR_RW(alarm_mask);
993 static DEVICE_ATTR_RW(num_temp_sensors);
994 static DEVICE_ATTR_RW(auto_update_interval);
996 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
997 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
998 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
999 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
1000 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
1001 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
1002 static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6);
1003 static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7);
1004 static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8);
1005 static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9);
1007 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
1008 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
1009 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
1010 static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
1011 static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4);
1012 static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5);
1013 static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6);
1014 static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7);
1015 static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8);
1016 static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9);
1018 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
1019 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
1020 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
1021 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
1022 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
1023 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
1024 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
1025 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
1026 static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8);
1027 static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9);
1029 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM);
1030 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM);
1031 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM);
1032 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM);
1033 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM);
1034 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM);
1035 static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM);
1036 static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM));
1037 static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM));
1038 static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM));
1040 static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0);
1041 static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1);
1042 static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2);
1043 static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3);
1045 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
1046 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
1047 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
1048 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
1050 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
1051 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
1052 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
1053 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
1055 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM));
1056 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM));
1057 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM));
1058 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM));
1060 static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
1062 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
1063 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
1064 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
1065 static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
1067 static DEVICE_ATTR_RW(pwm1_freq);
1069 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
1070 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
1071 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
1072 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
1074 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
1075 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
1076 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
1077 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
1079 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0);
1080 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1);
1081 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2);
1082 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3);
1084 static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0);
1085 static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
1086 static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
1087 static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
1089 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
1090 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
1091 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
1092 static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
1094 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
1095 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
1096 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
1097 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);
1099 static struct attribute *adt7470_attrs[] = {
1100 &dev_attr_alarm_mask.attr,
1101 &dev_attr_num_temp_sensors.attr,
1102 &dev_attr_auto_update_interval.attr,
1103 &sensor_dev_attr_temp1_max.dev_attr.attr,
1104 &sensor_dev_attr_temp2_max.dev_attr.attr,
1105 &sensor_dev_attr_temp3_max.dev_attr.attr,
1106 &sensor_dev_attr_temp4_max.dev_attr.attr,
1107 &sensor_dev_attr_temp5_max.dev_attr.attr,
1108 &sensor_dev_attr_temp6_max.dev_attr.attr,
1109 &sensor_dev_attr_temp7_max.dev_attr.attr,
1110 &sensor_dev_attr_temp8_max.dev_attr.attr,
1111 &sensor_dev_attr_temp9_max.dev_attr.attr,
1112 &sensor_dev_attr_temp10_max.dev_attr.attr,
1113 &sensor_dev_attr_temp1_min.dev_attr.attr,
1114 &sensor_dev_attr_temp2_min.dev_attr.attr,
1115 &sensor_dev_attr_temp3_min.dev_attr.attr,
1116 &sensor_dev_attr_temp4_min.dev_attr.attr,
1117 &sensor_dev_attr_temp5_min.dev_attr.attr,
1118 &sensor_dev_attr_temp6_min.dev_attr.attr,
1119 &sensor_dev_attr_temp7_min.dev_attr.attr,
1120 &sensor_dev_attr_temp8_min.dev_attr.attr,
1121 &sensor_dev_attr_temp9_min.dev_attr.attr,
1122 &sensor_dev_attr_temp10_min.dev_attr.attr,
1123 &sensor_dev_attr_temp1_input.dev_attr.attr,
1124 &sensor_dev_attr_temp2_input.dev_attr.attr,
1125 &sensor_dev_attr_temp3_input.dev_attr.attr,
1126 &sensor_dev_attr_temp4_input.dev_attr.attr,
1127 &sensor_dev_attr_temp5_input.dev_attr.attr,
1128 &sensor_dev_attr_temp6_input.dev_attr.attr,
1129 &sensor_dev_attr_temp7_input.dev_attr.attr,
1130 &sensor_dev_attr_temp8_input.dev_attr.attr,
1131 &sensor_dev_attr_temp9_input.dev_attr.attr,
1132 &sensor_dev_attr_temp10_input.dev_attr.attr,
1133 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1134 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1135 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1136 &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1137 &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1138 &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1139 &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1140 &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1141 &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1142 &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1143 &sensor_dev_attr_fan1_max.dev_attr.attr,
1144 &sensor_dev_attr_fan2_max.dev_attr.attr,
1145 &sensor_dev_attr_fan3_max.dev_attr.attr,
1146 &sensor_dev_attr_fan4_max.dev_attr.attr,
1147 &sensor_dev_attr_fan1_min.dev_attr.attr,
1148 &sensor_dev_attr_fan2_min.dev_attr.attr,
1149 &sensor_dev_attr_fan3_min.dev_attr.attr,
1150 &sensor_dev_attr_fan4_min.dev_attr.attr,
1151 &sensor_dev_attr_fan1_input.dev_attr.attr,
1152 &sensor_dev_attr_fan2_input.dev_attr.attr,
1153 &sensor_dev_attr_fan3_input.dev_attr.attr,
1154 &sensor_dev_attr_fan4_input.dev_attr.attr,
1155 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1156 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1157 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1158 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1159 &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1160 &sensor_dev_attr_pwm1.dev_attr.attr,
1161 &dev_attr_pwm1_freq.attr,
1162 &sensor_dev_attr_pwm2.dev_attr.attr,
1163 &sensor_dev_attr_pwm3.dev_attr.attr,
1164 &sensor_dev_attr_pwm4.dev_attr.attr,
1165 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1166 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1167 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1168 &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1169 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1170 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1171 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1172 &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1173 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1174 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1175 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1176 &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1177 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1178 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1179 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1180 &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1181 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1182 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1183 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1184 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1185 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1186 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1187 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1188 &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1192 ATTRIBUTE_GROUPS(adt7470);
1194 /* Return 0 if detection is successful, -ENODEV otherwise */
1195 static int adt7470_detect(struct i2c_client *client,
1196 struct i2c_board_info *info)
1198 struct i2c_adapter *adapter = client->adapter;
1199 int vendor, device, revision;
1201 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1204 vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1205 if (vendor != ADT7470_VENDOR)
1208 device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1209 if (device != ADT7470_DEVICE)
1212 revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1213 if (revision != ADT7470_REVISION)
1216 strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1221 static void adt7470_init_client(struct i2c_client *client)
1223 int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1226 dev_err(&client->dev, "cannot read configuration register\n");
1228 /* start monitoring (and do a self-test) */
1229 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1233 static int adt7470_probe(struct i2c_client *client,
1234 const struct i2c_device_id *id)
1236 struct device *dev = &client->dev;
1237 struct adt7470_data *data;
1238 struct device *hwmon_dev;
1240 data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1244 data->num_temp_sensors = -1;
1245 data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1247 i2c_set_clientdata(client, data);
1248 data->client = client;
1249 mutex_init(&data->lock);
1251 dev_info(&client->dev, "%s chip found\n", client->name);
1253 /* Initialize the ADT7470 chip */
1254 adt7470_init_client(client);
1256 /* Register sysfs hooks */
1257 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1261 if (IS_ERR(hwmon_dev))
1262 return PTR_ERR(hwmon_dev);
1264 data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1265 dev_name(hwmon_dev));
1266 if (IS_ERR(data->auto_update)) {
1267 return PTR_ERR(data->auto_update);
1273 static int adt7470_remove(struct i2c_client *client)
1275 struct adt7470_data *data = i2c_get_clientdata(client);
1277 kthread_stop(data->auto_update);
1281 static const struct i2c_device_id adt7470_id[] = {
1285 MODULE_DEVICE_TABLE(i2c, adt7470_id);
1287 static struct i2c_driver adt7470_driver = {
1288 .class = I2C_CLASS_HWMON,
1292 .probe = adt7470_probe,
1293 .remove = adt7470_remove,
1294 .id_table = adt7470_id,
1295 .detect = adt7470_detect,
1296 .address_list = normal_i2c,
1299 module_i2c_driver(adt7470_driver);
1301 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1302 MODULE_DESCRIPTION("ADT7470 driver");
1303 MODULE_LICENSE("GPL");