2 * adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
4 * Based on lm75.c and lm85.c
5 * Supports adm1030 / adm1031
6 * Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
7 * Reworked by Jean Delvare <jdelvare@suse.de>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/hwmon.h>
30 #include <linux/hwmon-sysfs.h>
31 #include <linux/err.h>
32 #include <linux/mutex.h>
34 /* Following macros takes channel parameter starting from 0 to 2 */
35 #define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
36 #define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
37 #define ADM1031_REG_PWM (0x22)
38 #define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))
39 #define ADM1031_REG_FAN_FILTER (0x23)
41 #define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr))
42 #define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr))
43 #define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr))
44 #define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr))
46 #define ADM1031_REG_TEMP(nr) (0x0a + (nr))
47 #define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))
49 #define ADM1031_REG_STATUS(nr) (0x2 + (nr))
51 #define ADM1031_REG_CONF1 0x00
52 #define ADM1031_REG_CONF2 0x01
53 #define ADM1031_REG_EXT_TEMP 0x06
55 #define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
56 #define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
57 #define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */
59 #define ADM1031_CONF2_PWM1_ENABLE 0x01
60 #define ADM1031_CONF2_PWM2_ENABLE 0x02
61 #define ADM1031_CONF2_TACH1_ENABLE 0x04
62 #define ADM1031_CONF2_TACH2_ENABLE 0x08
63 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
65 #define ADM1031_UPDATE_RATE_MASK 0x1c
66 #define ADM1031_UPDATE_RATE_SHIFT 2
68 /* Addresses to scan */
69 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
71 enum chips { adm1030, adm1031 };
73 typedef u8 auto_chan_table_t[8][2];
75 /* Each client has this additional data */
77 struct device *hwmon_dev;
78 struct mutex update_lock;
80 char valid; /* !=0 if following fields are valid */
81 unsigned long last_updated; /* In jiffies */
82 unsigned int update_interval; /* In milliseconds */
84 * The chan_select_table contains the possible configurations for
87 const auto_chan_table_t *chan_select_table;
108 static int adm1031_probe(struct i2c_client *client,
109 const struct i2c_device_id *id);
110 static int adm1031_detect(struct i2c_client *client,
111 struct i2c_board_info *info);
112 static void adm1031_init_client(struct i2c_client *client);
113 static int adm1031_remove(struct i2c_client *client);
114 static struct adm1031_data *adm1031_update_device(struct device *dev);
116 static const struct i2c_device_id adm1031_id[] = {
117 { "adm1030", adm1030 },
118 { "adm1031", adm1031 },
121 MODULE_DEVICE_TABLE(i2c, adm1031_id);
123 /* This is the driver that will be inserted */
124 static struct i2c_driver adm1031_driver = {
125 .class = I2C_CLASS_HWMON,
129 .probe = adm1031_probe,
130 .remove = adm1031_remove,
131 .id_table = adm1031_id,
132 .detect = adm1031_detect,
133 .address_list = normal_i2c,
136 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
138 return i2c_smbus_read_byte_data(client, reg);
142 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
144 return i2c_smbus_write_byte_data(client, reg, value);
148 #define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \
149 ((val + 500) / 1000)))
151 #define TEMP_FROM_REG(val) ((val) * 1000)
153 #define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)
155 #define TEMP_OFFSET_TO_REG(val) (TEMP_TO_REG(val) & 0x8f)
156 #define TEMP_OFFSET_FROM_REG(val) TEMP_FROM_REG((val) < 0 ? \
157 (val) | 0x70 : (val))
159 #define FAN_FROM_REG(reg, div) ((reg) ? \
160 (11250 * 60) / ((reg) * (div)) : 0)
162 static int FAN_TO_REG(int reg, int div)
165 tmp = FAN_FROM_REG(clamp_val(reg, 0, 65535), div);
166 return tmp > 255 ? 255 : tmp;
169 #define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
171 #define PWM_TO_REG(val) (clamp_val((val), 0, 255) >> 4)
172 #define PWM_FROM_REG(val) ((val) << 4)
174 #define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7)
175 #define FAN_CHAN_TO_REG(val, reg) \
176 (((reg) & 0x1F) | (((val) << 5) & 0xe0))
178 #define AUTO_TEMP_MIN_TO_REG(val, reg) \
179 ((((val) / 500) & 0xf8) | ((reg) & 0x7))
180 #define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1 << ((reg) & 0x7)))
181 #define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2))
183 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
185 #define AUTO_TEMP_OFF_FROM_REG(reg) \
186 (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
188 #define AUTO_TEMP_MAX_FROM_REG(reg) \
189 (AUTO_TEMP_RANGE_FROM_REG(reg) + \
190 AUTO_TEMP_MIN_FROM_REG(reg))
192 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
195 int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
197 range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
198 ret = ((reg & 0xf8) |
201 range < 40000 ? 2 : range < 80000 ? 3 : 4));
205 /* FAN auto control */
206 #define GET_FAN_AUTO_BITFIELD(data, idx) \
207 (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx % 2]
210 * The tables below contains the possible values for the auto fan
211 * control bitfields. the index in the table is the register value.
212 * MSb is the auto fan control enable bit, so the four first entries
213 * in the table disables auto fan control when both bitfields are zero.
215 static const auto_chan_table_t auto_channel_select_table_adm1031 = {
216 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
217 { 2 /* 0b010 */ , 4 /* 0b100 */ },
218 { 2 /* 0b010 */ , 2 /* 0b010 */ },
219 { 4 /* 0b100 */ , 4 /* 0b100 */ },
220 { 7 /* 0b111 */ , 7 /* 0b111 */ },
223 static const auto_chan_table_t auto_channel_select_table_adm1030 = {
224 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
225 { 2 /* 0b10 */ , 0 },
226 { 0xff /* invalid */ , 0 },
227 { 0xff /* invalid */ , 0 },
228 { 3 /* 0b11 */ , 0 },
232 * That function checks if a bitfield is valid and returns the other bitfield
233 * nearest match if no exact match where found.
236 get_fan_auto_nearest(struct adm1031_data *data, int chan, u8 val, u8 reg)
239 int first_match = -1, exact_match = -1;
241 (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
246 for (i = 0; i < 8; i++) {
247 if ((val == (*data->chan_select_table)[i][chan]) &&
248 ((*data->chan_select_table)[i][chan ? 0 : 1] ==
250 /* We found an exact match */
253 } else if (val == (*data->chan_select_table)[i][chan] &&
256 * Save the first match in case of an exact match has
263 if (exact_match >= 0)
265 else if (first_match >= 0)
271 static ssize_t show_fan_auto_channel(struct device *dev,
272 struct device_attribute *attr, char *buf)
274 int nr = to_sensor_dev_attr(attr)->index;
275 struct adm1031_data *data = adm1031_update_device(dev);
276 return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
280 set_fan_auto_channel(struct device *dev, struct device_attribute *attr,
281 const char *buf, size_t count)
283 struct i2c_client *client = to_i2c_client(dev);
284 struct adm1031_data *data = i2c_get_clientdata(client);
285 int nr = to_sensor_dev_attr(attr)->index;
291 ret = kstrtol(buf, 10, &val);
295 old_fan_mode = data->conf1;
297 mutex_lock(&data->update_lock);
299 ret = get_fan_auto_nearest(data, nr, val, data->conf1);
301 mutex_unlock(&data->update_lock);
305 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
306 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^
307 (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
308 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
310 * Switch to Auto Fan Mode
312 * Set PWM registers to 33% Both
314 data->old_pwm[0] = data->pwm[0];
315 data->old_pwm[1] = data->pwm[1];
316 adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
318 /* Switch to Manual Mode */
319 data->pwm[0] = data->old_pwm[0];
320 data->pwm[1] = data->old_pwm[1];
321 /* Restore PWM registers */
322 adm1031_write_value(client, ADM1031_REG_PWM,
323 data->pwm[0] | (data->pwm[1] << 4));
326 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
327 adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
328 mutex_unlock(&data->update_lock);
332 static SENSOR_DEVICE_ATTR(auto_fan1_channel, S_IRUGO | S_IWUSR,
333 show_fan_auto_channel, set_fan_auto_channel, 0);
334 static SENSOR_DEVICE_ATTR(auto_fan2_channel, S_IRUGO | S_IWUSR,
335 show_fan_auto_channel, set_fan_auto_channel, 1);
338 static ssize_t show_auto_temp_off(struct device *dev,
339 struct device_attribute *attr, char *buf)
341 int nr = to_sensor_dev_attr(attr)->index;
342 struct adm1031_data *data = adm1031_update_device(dev);
343 return sprintf(buf, "%d\n",
344 AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
346 static ssize_t show_auto_temp_min(struct device *dev,
347 struct device_attribute *attr, char *buf)
349 int nr = to_sensor_dev_attr(attr)->index;
350 struct adm1031_data *data = adm1031_update_device(dev);
351 return sprintf(buf, "%d\n",
352 AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
355 set_auto_temp_min(struct device *dev, struct device_attribute *attr,
356 const char *buf, size_t count)
358 struct i2c_client *client = to_i2c_client(dev);
359 struct adm1031_data *data = i2c_get_clientdata(client);
360 int nr = to_sensor_dev_attr(attr)->index;
364 ret = kstrtol(buf, 10, &val);
368 val = clamp_val(val, 0, 127000);
369 mutex_lock(&data->update_lock);
370 data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
371 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
372 data->auto_temp[nr]);
373 mutex_unlock(&data->update_lock);
376 static ssize_t show_auto_temp_max(struct device *dev,
377 struct device_attribute *attr, char *buf)
379 int nr = to_sensor_dev_attr(attr)->index;
380 struct adm1031_data *data = adm1031_update_device(dev);
381 return sprintf(buf, "%d\n",
382 AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
385 set_auto_temp_max(struct device *dev, struct device_attribute *attr,
386 const char *buf, size_t count)
388 struct i2c_client *client = to_i2c_client(dev);
389 struct adm1031_data *data = i2c_get_clientdata(client);
390 int nr = to_sensor_dev_attr(attr)->index;
394 ret = kstrtol(buf, 10, &val);
398 val = clamp_val(val, 0, 127000);
399 mutex_lock(&data->update_lock);
400 data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr],
402 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
404 mutex_unlock(&data->update_lock);
408 #define auto_temp_reg(offset) \
409 static SENSOR_DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO, \
410 show_auto_temp_off, NULL, offset - 1); \
411 static SENSOR_DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR, \
412 show_auto_temp_min, set_auto_temp_min, offset - 1); \
413 static SENSOR_DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR, \
414 show_auto_temp_max, set_auto_temp_max, offset - 1)
421 static ssize_t show_pwm(struct device *dev,
422 struct device_attribute *attr, char *buf)
424 int nr = to_sensor_dev_attr(attr)->index;
425 struct adm1031_data *data = adm1031_update_device(dev);
426 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
428 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
429 const char *buf, size_t count)
431 struct i2c_client *client = to_i2c_client(dev);
432 struct adm1031_data *data = i2c_get_clientdata(client);
433 int nr = to_sensor_dev_attr(attr)->index;
437 ret = kstrtol(buf, 10, &val);
441 mutex_lock(&data->update_lock);
442 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
443 (((val>>4) & 0xf) != 5)) {
444 /* In automatic mode, the only PWM accepted is 33% */
445 mutex_unlock(&data->update_lock);
448 data->pwm[nr] = PWM_TO_REG(val);
449 reg = adm1031_read_value(client, ADM1031_REG_PWM);
450 adm1031_write_value(client, ADM1031_REG_PWM,
451 nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
452 : (data->pwm[nr] & 0xf) | (reg & 0xf0));
453 mutex_unlock(&data->update_lock);
457 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
458 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
459 static SENSOR_DEVICE_ATTR(auto_fan1_min_pwm, S_IRUGO | S_IWUSR,
460 show_pwm, set_pwm, 0);
461 static SENSOR_DEVICE_ATTR(auto_fan2_min_pwm, S_IRUGO | S_IWUSR,
462 show_pwm, set_pwm, 1);
467 * That function checks the cases where the fan reading is not
468 * relevant. It is used to provide 0 as fan reading when the fan is
469 * not supposed to run
471 static int trust_fan_readings(struct adm1031_data *data, int chan)
475 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
476 switch (data->conf1 & 0x60) {
479 * remote temp1 controls fan1,
480 * remote temp2 controls fan2
482 res = data->temp[chan+1] >=
483 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
485 case 0x20: /* remote temp1 controls both fans */
488 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
490 case 0x40: /* remote temp2 controls both fans */
493 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
495 case 0x60: /* max controls both fans */
498 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
500 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
501 || (data->chip_type == adm1031
503 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
507 res = data->pwm[chan] > 0;
513 static ssize_t show_fan(struct device *dev,
514 struct device_attribute *attr, char *buf)
516 int nr = to_sensor_dev_attr(attr)->index;
517 struct adm1031_data *data = adm1031_update_device(dev);
520 value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
521 FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
522 return sprintf(buf, "%d\n", value);
525 static ssize_t show_fan_div(struct device *dev,
526 struct device_attribute *attr, char *buf)
528 int nr = to_sensor_dev_attr(attr)->index;
529 struct adm1031_data *data = adm1031_update_device(dev);
530 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
532 static ssize_t show_fan_min(struct device *dev,
533 struct device_attribute *attr, char *buf)
535 int nr = to_sensor_dev_attr(attr)->index;
536 struct adm1031_data *data = adm1031_update_device(dev);
537 return sprintf(buf, "%d\n",
538 FAN_FROM_REG(data->fan_min[nr],
539 FAN_DIV_FROM_REG(data->fan_div[nr])));
541 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
542 const char *buf, size_t count)
544 struct i2c_client *client = to_i2c_client(dev);
545 struct adm1031_data *data = i2c_get_clientdata(client);
546 int nr = to_sensor_dev_attr(attr)->index;
550 ret = kstrtol(buf, 10, &val);
554 mutex_lock(&data->update_lock);
557 FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
559 data->fan_min[nr] = 0xff;
561 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
562 mutex_unlock(&data->update_lock);
565 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
566 const char *buf, size_t count)
568 struct i2c_client *client = to_i2c_client(dev);
569 struct adm1031_data *data = i2c_get_clientdata(client);
570 int nr = to_sensor_dev_attr(attr)->index;
577 ret = kstrtol(buf, 10, &val);
581 tmp = val == 8 ? 0xc0 :
589 mutex_lock(&data->update_lock);
590 /* Get fresh readings */
591 data->fan_div[nr] = adm1031_read_value(client,
592 ADM1031_REG_FAN_DIV(nr));
593 data->fan_min[nr] = adm1031_read_value(client,
594 ADM1031_REG_FAN_MIN(nr));
596 /* Write the new clock divider and fan min */
597 old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
598 data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]);
599 new_min = data->fan_min[nr] * old_div / val;
600 data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
602 adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
604 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
607 /* Invalidate the cache: fan speed is no longer valid */
609 mutex_unlock(&data->update_lock);
613 #define fan_offset(offset) \
614 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
615 show_fan, NULL, offset - 1); \
616 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
617 show_fan_min, set_fan_min, offset - 1); \
618 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
619 show_fan_div, set_fan_div, offset - 1)
626 static ssize_t show_temp(struct device *dev,
627 struct device_attribute *attr, char *buf)
629 int nr = to_sensor_dev_attr(attr)->index;
630 struct adm1031_data *data = adm1031_update_device(dev);
633 ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
634 (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
635 return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
637 static ssize_t show_temp_offset(struct device *dev,
638 struct device_attribute *attr, char *buf)
640 int nr = to_sensor_dev_attr(attr)->index;
641 struct adm1031_data *data = adm1031_update_device(dev);
642 return sprintf(buf, "%d\n",
643 TEMP_OFFSET_FROM_REG(data->temp_offset[nr]));
645 static ssize_t show_temp_min(struct device *dev,
646 struct device_attribute *attr, char *buf)
648 int nr = to_sensor_dev_attr(attr)->index;
649 struct adm1031_data *data = adm1031_update_device(dev);
650 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
652 static ssize_t show_temp_max(struct device *dev,
653 struct device_attribute *attr, char *buf)
655 int nr = to_sensor_dev_attr(attr)->index;
656 struct adm1031_data *data = adm1031_update_device(dev);
657 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
659 static ssize_t show_temp_crit(struct device *dev,
660 struct device_attribute *attr, char *buf)
662 int nr = to_sensor_dev_attr(attr)->index;
663 struct adm1031_data *data = adm1031_update_device(dev);
664 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
666 static ssize_t set_temp_offset(struct device *dev,
667 struct device_attribute *attr, const char *buf,
670 struct i2c_client *client = to_i2c_client(dev);
671 struct adm1031_data *data = i2c_get_clientdata(client);
672 int nr = to_sensor_dev_attr(attr)->index;
676 ret = kstrtol(buf, 10, &val);
680 val = clamp_val(val, -15000, 15000);
681 mutex_lock(&data->update_lock);
682 data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val);
683 adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr),
684 data->temp_offset[nr]);
685 mutex_unlock(&data->update_lock);
688 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
689 const char *buf, size_t count)
691 struct i2c_client *client = to_i2c_client(dev);
692 struct adm1031_data *data = i2c_get_clientdata(client);
693 int nr = to_sensor_dev_attr(attr)->index;
697 ret = kstrtol(buf, 10, &val);
701 val = clamp_val(val, -55000, 127000);
702 mutex_lock(&data->update_lock);
703 data->temp_min[nr] = TEMP_TO_REG(val);
704 adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
706 mutex_unlock(&data->update_lock);
709 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
710 const char *buf, size_t count)
712 struct i2c_client *client = to_i2c_client(dev);
713 struct adm1031_data *data = i2c_get_clientdata(client);
714 int nr = to_sensor_dev_attr(attr)->index;
718 ret = kstrtol(buf, 10, &val);
722 val = clamp_val(val, -55000, 127000);
723 mutex_lock(&data->update_lock);
724 data->temp_max[nr] = TEMP_TO_REG(val);
725 adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
727 mutex_unlock(&data->update_lock);
730 static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
731 const char *buf, size_t count)
733 struct i2c_client *client = to_i2c_client(dev);
734 struct adm1031_data *data = i2c_get_clientdata(client);
735 int nr = to_sensor_dev_attr(attr)->index;
739 ret = kstrtol(buf, 10, &val);
743 val = clamp_val(val, -55000, 127000);
744 mutex_lock(&data->update_lock);
745 data->temp_crit[nr] = TEMP_TO_REG(val);
746 adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
747 data->temp_crit[nr]);
748 mutex_unlock(&data->update_lock);
752 #define temp_reg(offset) \
753 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
754 show_temp, NULL, offset - 1); \
755 static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR, \
756 show_temp_offset, set_temp_offset, offset - 1); \
757 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
758 show_temp_min, set_temp_min, offset - 1); \
759 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
760 show_temp_max, set_temp_max, offset - 1); \
761 static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR, \
762 show_temp_crit, set_temp_crit, offset - 1)
769 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
772 struct adm1031_data *data = adm1031_update_device(dev);
773 return sprintf(buf, "%d\n", data->alarm);
776 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
778 static ssize_t show_alarm(struct device *dev,
779 struct device_attribute *attr, char *buf)
781 int bitnr = to_sensor_dev_attr(attr)->index;
782 struct adm1031_data *data = adm1031_update_device(dev);
783 return sprintf(buf, "%d\n", (data->alarm >> bitnr) & 1);
786 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
787 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_alarm, NULL, 1);
788 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 2);
789 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
790 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 4);
791 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 5);
792 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
793 static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 7);
794 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 8);
795 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_alarm, NULL, 9);
796 static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 10);
797 static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
798 static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
799 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 13);
800 static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
802 /* Update Interval */
803 static const unsigned int update_intervals[] = {
804 16000, 8000, 4000, 2000, 1000, 500, 250, 125,
807 static ssize_t show_update_interval(struct device *dev,
808 struct device_attribute *attr, char *buf)
810 struct i2c_client *client = to_i2c_client(dev);
811 struct adm1031_data *data = i2c_get_clientdata(client);
813 return sprintf(buf, "%u\n", data->update_interval);
816 static ssize_t set_update_interval(struct device *dev,
817 struct device_attribute *attr,
818 const char *buf, size_t count)
820 struct i2c_client *client = to_i2c_client(dev);
821 struct adm1031_data *data = i2c_get_clientdata(client);
826 err = kstrtoul(buf, 10, &val);
831 * Find the nearest update interval from the table.
832 * Use it to determine the matching update rate.
834 for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) {
835 if (val >= update_intervals[i])
838 /* if not found, we point to the last entry (lowest update interval) */
840 /* set the new update rate while preserving other settings */
841 reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
842 reg &= ~ADM1031_UPDATE_RATE_MASK;
843 reg |= i << ADM1031_UPDATE_RATE_SHIFT;
844 adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg);
846 mutex_lock(&data->update_lock);
847 data->update_interval = update_intervals[i];
848 mutex_unlock(&data->update_lock);
853 static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
854 set_update_interval);
856 static struct attribute *adm1031_attributes[] = {
857 &sensor_dev_attr_fan1_input.dev_attr.attr,
858 &sensor_dev_attr_fan1_div.dev_attr.attr,
859 &sensor_dev_attr_fan1_min.dev_attr.attr,
860 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
861 &sensor_dev_attr_fan1_fault.dev_attr.attr,
862 &sensor_dev_attr_pwm1.dev_attr.attr,
863 &sensor_dev_attr_auto_fan1_channel.dev_attr.attr,
864 &sensor_dev_attr_temp1_input.dev_attr.attr,
865 &sensor_dev_attr_temp1_offset.dev_attr.attr,
866 &sensor_dev_attr_temp1_min.dev_attr.attr,
867 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
868 &sensor_dev_attr_temp1_max.dev_attr.attr,
869 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
870 &sensor_dev_attr_temp1_crit.dev_attr.attr,
871 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
872 &sensor_dev_attr_temp2_input.dev_attr.attr,
873 &sensor_dev_attr_temp2_offset.dev_attr.attr,
874 &sensor_dev_attr_temp2_min.dev_attr.attr,
875 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
876 &sensor_dev_attr_temp2_max.dev_attr.attr,
877 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
878 &sensor_dev_attr_temp2_crit.dev_attr.attr,
879 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
880 &sensor_dev_attr_temp2_fault.dev_attr.attr,
882 &sensor_dev_attr_auto_temp1_off.dev_attr.attr,
883 &sensor_dev_attr_auto_temp1_min.dev_attr.attr,
884 &sensor_dev_attr_auto_temp1_max.dev_attr.attr,
886 &sensor_dev_attr_auto_temp2_off.dev_attr.attr,
887 &sensor_dev_attr_auto_temp2_min.dev_attr.attr,
888 &sensor_dev_attr_auto_temp2_max.dev_attr.attr,
890 &sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr,
892 &dev_attr_update_interval.attr,
893 &dev_attr_alarms.attr,
898 static const struct attribute_group adm1031_group = {
899 .attrs = adm1031_attributes,
902 static struct attribute *adm1031_attributes_opt[] = {
903 &sensor_dev_attr_fan2_input.dev_attr.attr,
904 &sensor_dev_attr_fan2_div.dev_attr.attr,
905 &sensor_dev_attr_fan2_min.dev_attr.attr,
906 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
907 &sensor_dev_attr_fan2_fault.dev_attr.attr,
908 &sensor_dev_attr_pwm2.dev_attr.attr,
909 &sensor_dev_attr_auto_fan2_channel.dev_attr.attr,
910 &sensor_dev_attr_temp3_input.dev_attr.attr,
911 &sensor_dev_attr_temp3_offset.dev_attr.attr,
912 &sensor_dev_attr_temp3_min.dev_attr.attr,
913 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
914 &sensor_dev_attr_temp3_max.dev_attr.attr,
915 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
916 &sensor_dev_attr_temp3_crit.dev_attr.attr,
917 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
918 &sensor_dev_attr_temp3_fault.dev_attr.attr,
919 &sensor_dev_attr_auto_temp3_off.dev_attr.attr,
920 &sensor_dev_attr_auto_temp3_min.dev_attr.attr,
921 &sensor_dev_attr_auto_temp3_max.dev_attr.attr,
922 &sensor_dev_attr_auto_fan2_min_pwm.dev_attr.attr,
926 static const struct attribute_group adm1031_group_opt = {
927 .attrs = adm1031_attributes_opt,
930 /* Return 0 if detection is successful, -ENODEV otherwise */
931 static int adm1031_detect(struct i2c_client *client,
932 struct i2c_board_info *info)
934 struct i2c_adapter *adapter = client->adapter;
938 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
941 id = i2c_smbus_read_byte_data(client, 0x3d);
942 co = i2c_smbus_read_byte_data(client, 0x3e);
944 if (!((id == 0x31 || id == 0x30) && co == 0x41))
946 name = (id == 0x30) ? "adm1030" : "adm1031";
948 strlcpy(info->type, name, I2C_NAME_SIZE);
953 static int adm1031_probe(struct i2c_client *client,
954 const struct i2c_device_id *id)
956 struct adm1031_data *data;
959 data = devm_kzalloc(&client->dev, sizeof(struct adm1031_data),
964 i2c_set_clientdata(client, data);
965 data->chip_type = id->driver_data;
966 mutex_init(&data->update_lock);
968 if (data->chip_type == adm1030)
969 data->chan_select_table = &auto_channel_select_table_adm1030;
971 data->chan_select_table = &auto_channel_select_table_adm1031;
973 /* Initialize the ADM1031 chip */
974 adm1031_init_client(client);
976 /* Register sysfs hooks */
977 err = sysfs_create_group(&client->dev.kobj, &adm1031_group);
981 if (data->chip_type == adm1031) {
982 err = sysfs_create_group(&client->dev.kobj, &adm1031_group_opt);
987 data->hwmon_dev = hwmon_device_register(&client->dev);
988 if (IS_ERR(data->hwmon_dev)) {
989 err = PTR_ERR(data->hwmon_dev);
996 sysfs_remove_group(&client->dev.kobj, &adm1031_group);
997 sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
1001 static int adm1031_remove(struct i2c_client *client)
1003 struct adm1031_data *data = i2c_get_clientdata(client);
1005 hwmon_device_unregister(data->hwmon_dev);
1006 sysfs_remove_group(&client->dev.kobj, &adm1031_group);
1007 sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
1011 static void adm1031_init_client(struct i2c_client *client)
1013 unsigned int read_val;
1016 struct adm1031_data *data = i2c_get_clientdata(client);
1018 mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
1019 if (data->chip_type == adm1031) {
1020 mask |= (ADM1031_CONF2_PWM2_ENABLE |
1021 ADM1031_CONF2_TACH2_ENABLE);
1023 /* Initialize the ADM1031 chip (enables fan speed reading ) */
1024 read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
1025 if ((read_val | mask) != read_val)
1026 adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
1028 read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
1029 if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
1030 adm1031_write_value(client, ADM1031_REG_CONF1,
1031 read_val | ADM1031_CONF1_MONITOR_ENABLE);
1034 /* Read the chip's update rate */
1035 mask = ADM1031_UPDATE_RATE_MASK;
1036 read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
1037 i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT;
1038 /* Save it as update interval */
1039 data->update_interval = update_intervals[i];
1042 static struct adm1031_data *adm1031_update_device(struct device *dev)
1044 struct i2c_client *client = to_i2c_client(dev);
1045 struct adm1031_data *data = i2c_get_clientdata(client);
1046 unsigned long next_update;
1049 mutex_lock(&data->update_lock);
1051 next_update = data->last_updated
1052 + msecs_to_jiffies(data->update_interval);
1053 if (time_after(jiffies, next_update) || !data->valid) {
1055 dev_dbg(&client->dev, "Starting adm1031 update\n");
1057 chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
1061 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
1062 data->ext_temp[chan] =
1063 adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
1065 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
1067 data->ext_temp[chan] =
1068 adm1031_read_value(client,
1069 ADM1031_REG_EXT_TEMP);
1072 adm1031_read_value(client,
1073 ADM1031_REG_TEMP(chan));
1075 /* oldh is actually newer */
1077 dev_warn(&client->dev,
1078 "Remote temperature may be wrong.\n");
1081 data->temp[chan] = newh;
1083 data->temp_offset[chan] =
1084 adm1031_read_value(client,
1085 ADM1031_REG_TEMP_OFFSET(chan));
1086 data->temp_min[chan] =
1087 adm1031_read_value(client,
1088 ADM1031_REG_TEMP_MIN(chan));
1089 data->temp_max[chan] =
1090 adm1031_read_value(client,
1091 ADM1031_REG_TEMP_MAX(chan));
1092 data->temp_crit[chan] =
1093 adm1031_read_value(client,
1094 ADM1031_REG_TEMP_CRIT(chan));
1095 data->auto_temp[chan] =
1096 adm1031_read_value(client,
1097 ADM1031_REG_AUTO_TEMP(chan));
1101 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
1102 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
1104 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
1105 | (adm1031_read_value(client, ADM1031_REG_STATUS(1)) << 8);
1106 if (data->chip_type == adm1030)
1107 data->alarm &= 0xc0ff;
1109 for (chan = 0; chan < (data->chip_type == adm1030 ? 1 : 2);
1111 data->fan_div[chan] =
1112 adm1031_read_value(client,
1113 ADM1031_REG_FAN_DIV(chan));
1114 data->fan_min[chan] =
1115 adm1031_read_value(client,
1116 ADM1031_REG_FAN_MIN(chan));
1118 adm1031_read_value(client,
1119 ADM1031_REG_FAN_SPEED(chan));
1121 (adm1031_read_value(client,
1122 ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
1124 data->last_updated = jiffies;
1128 mutex_unlock(&data->update_lock);
1133 module_i2c_driver(adm1031_driver);
1135 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
1136 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
1137 MODULE_LICENSE("GPL");