1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
5 * Based on lm75.c and lm85.c
6 * Supports adm1030 / adm1031
7 * Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
8 * Reworked by Jean Delvare <jdelvare@suse.de>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/jiffies.h>
15 #include <linux/i2c.h>
16 #include <linux/hwmon.h>
17 #include <linux/hwmon-sysfs.h>
18 #include <linux/err.h>
19 #include <linux/mutex.h>
21 /* Following macros takes channel parameter starting from 0 to 2 */
22 #define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
23 #define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
24 #define ADM1031_REG_PWM (0x22)
25 #define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))
26 #define ADM1031_REG_FAN_FILTER (0x23)
28 #define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr))
29 #define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr))
30 #define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr))
31 #define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr))
33 #define ADM1031_REG_TEMP(nr) (0x0a + (nr))
34 #define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))
36 #define ADM1031_REG_STATUS(nr) (0x2 + (nr))
38 #define ADM1031_REG_CONF1 0x00
39 #define ADM1031_REG_CONF2 0x01
40 #define ADM1031_REG_EXT_TEMP 0x06
42 #define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
43 #define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
44 #define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */
46 #define ADM1031_CONF2_PWM1_ENABLE 0x01
47 #define ADM1031_CONF2_PWM2_ENABLE 0x02
48 #define ADM1031_CONF2_TACH1_ENABLE 0x04
49 #define ADM1031_CONF2_TACH2_ENABLE 0x08
50 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
52 #define ADM1031_UPDATE_RATE_MASK 0x1c
53 #define ADM1031_UPDATE_RATE_SHIFT 2
55 /* Addresses to scan */
56 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
58 enum chips { adm1030, adm1031 };
60 typedef u8 auto_chan_table_t[8][2];
62 /* Each client has this additional data */
64 struct i2c_client *client;
65 const struct attribute_group *groups[3];
66 struct mutex update_lock;
68 bool valid; /* true if following fields are valid */
69 unsigned long last_updated; /* In jiffies */
70 unsigned int update_interval; /* In milliseconds */
72 * The chan_select_table contains the possible configurations for
75 const auto_chan_table_t *chan_select_table;
96 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
98 return i2c_smbus_read_byte_data(client, reg);
102 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
104 return i2c_smbus_write_byte_data(client, reg, value);
107 static struct adm1031_data *adm1031_update_device(struct device *dev)
109 struct adm1031_data *data = dev_get_drvdata(dev);
110 struct i2c_client *client = data->client;
111 unsigned long next_update;
114 mutex_lock(&data->update_lock);
116 next_update = data->last_updated
117 + msecs_to_jiffies(data->update_interval);
118 if (time_after(jiffies, next_update) || !data->valid) {
120 dev_dbg(&client->dev, "Starting adm1031 update\n");
122 chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
126 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
127 data->ext_temp[chan] =
128 adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
130 adm1031_read_value(client, ADM1031_REG_TEMP(chan));
132 data->ext_temp[chan] =
133 adm1031_read_value(client,
134 ADM1031_REG_EXT_TEMP);
137 adm1031_read_value(client,
138 ADM1031_REG_TEMP(chan));
140 /* oldh is actually newer */
142 dev_warn(&client->dev,
143 "Remote temperature may be wrong.\n");
146 data->temp[chan] = newh;
148 data->temp_offset[chan] =
149 adm1031_read_value(client,
150 ADM1031_REG_TEMP_OFFSET(chan));
151 data->temp_min[chan] =
152 adm1031_read_value(client,
153 ADM1031_REG_TEMP_MIN(chan));
154 data->temp_max[chan] =
155 adm1031_read_value(client,
156 ADM1031_REG_TEMP_MAX(chan));
157 data->temp_crit[chan] =
158 adm1031_read_value(client,
159 ADM1031_REG_TEMP_CRIT(chan));
160 data->auto_temp[chan] =
161 adm1031_read_value(client,
162 ADM1031_REG_AUTO_TEMP(chan));
166 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
167 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
169 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
170 | (adm1031_read_value(client, ADM1031_REG_STATUS(1)) << 8);
171 if (data->chip_type == adm1030)
172 data->alarm &= 0xc0ff;
174 for (chan = 0; chan < (data->chip_type == adm1030 ? 1 : 2);
176 data->fan_div[chan] =
177 adm1031_read_value(client,
178 ADM1031_REG_FAN_DIV(chan));
179 data->fan_min[chan] =
180 adm1031_read_value(client,
181 ADM1031_REG_FAN_MIN(chan));
183 adm1031_read_value(client,
184 ADM1031_REG_FAN_SPEED(chan));
186 (adm1031_read_value(client,
187 ADM1031_REG_PWM) >> (4 * chan)) & 0x0f;
189 data->last_updated = jiffies;
193 mutex_unlock(&data->update_lock);
198 #define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \
199 ((val + 500) / 1000)))
201 #define TEMP_FROM_REG(val) ((val) * 1000)
203 #define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)
205 #define TEMP_OFFSET_TO_REG(val) (TEMP_TO_REG(val) & 0x8f)
206 #define TEMP_OFFSET_FROM_REG(val) TEMP_FROM_REG((val) < 0 ? \
207 (val) | 0x70 : (val))
209 #define FAN_FROM_REG(reg, div) ((reg) ? \
210 (11250 * 60) / ((reg) * (div)) : 0)
212 static int FAN_TO_REG(int reg, int div)
215 tmp = FAN_FROM_REG(clamp_val(reg, 0, 65535), div);
216 return tmp > 255 ? 255 : tmp;
219 #define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
221 #define PWM_TO_REG(val) (clamp_val((val), 0, 255) >> 4)
222 #define PWM_FROM_REG(val) ((val) << 4)
224 #define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7)
225 #define FAN_CHAN_TO_REG(val, reg) \
226 (((reg) & 0x1F) | (((val) << 5) & 0xe0))
228 #define AUTO_TEMP_MIN_TO_REG(val, reg) \
229 ((((val) / 500) & 0xf8) | ((reg) & 0x7))
230 #define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1 << ((reg) & 0x7)))
231 #define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2))
233 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
235 #define AUTO_TEMP_OFF_FROM_REG(reg) \
236 (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
238 #define AUTO_TEMP_MAX_FROM_REG(reg) \
239 (AUTO_TEMP_RANGE_FROM_REG(reg) + \
240 AUTO_TEMP_MIN_FROM_REG(reg))
242 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
245 int range = ((val - AUTO_TEMP_MIN_FROM_REG(reg)) * 10) / (16 - pwm);
247 ret = ((reg & 0xf8) |
250 range < 40000 ? 2 : range < 80000 ? 3 : 4));
254 /* FAN auto control */
255 #define GET_FAN_AUTO_BITFIELD(data, idx) \
256 (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx % 2]
259 * The tables below contains the possible values for the auto fan
260 * control bitfields. the index in the table is the register value.
261 * MSb is the auto fan control enable bit, so the four first entries
262 * in the table disables auto fan control when both bitfields are zero.
264 static const auto_chan_table_t auto_channel_select_table_adm1031 = {
265 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
266 { 2 /* 0b010 */ , 4 /* 0b100 */ },
267 { 2 /* 0b010 */ , 2 /* 0b010 */ },
268 { 4 /* 0b100 */ , 4 /* 0b100 */ },
269 { 7 /* 0b111 */ , 7 /* 0b111 */ },
272 static const auto_chan_table_t auto_channel_select_table_adm1030 = {
273 { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
274 { 2 /* 0b10 */ , 0 },
275 { 0xff /* invalid */ , 0 },
276 { 0xff /* invalid */ , 0 },
277 { 3 /* 0b11 */ , 0 },
281 * That function checks if a bitfield is valid and returns the other bitfield
282 * nearest match if no exact match where found.
285 get_fan_auto_nearest(struct adm1031_data *data, int chan, u8 val, u8 reg)
288 int first_match = -1, exact_match = -1;
290 (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
295 for (i = 0; i < 8; i++) {
296 if ((val == (*data->chan_select_table)[i][chan]) &&
297 ((*data->chan_select_table)[i][chan ? 0 : 1] ==
299 /* We found an exact match */
302 } else if (val == (*data->chan_select_table)[i][chan] &&
305 * Save the first match in case of an exact match has
312 if (exact_match >= 0)
314 else if (first_match >= 0)
320 static ssize_t fan_auto_channel_show(struct device *dev,
321 struct device_attribute *attr, char *buf)
323 int nr = to_sensor_dev_attr(attr)->index;
324 struct adm1031_data *data = adm1031_update_device(dev);
325 return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
329 fan_auto_channel_store(struct device *dev, struct device_attribute *attr,
330 const char *buf, size_t count)
332 struct adm1031_data *data = dev_get_drvdata(dev);
333 struct i2c_client *client = data->client;
334 int nr = to_sensor_dev_attr(attr)->index;
340 ret = kstrtol(buf, 10, &val);
344 old_fan_mode = data->conf1;
346 mutex_lock(&data->update_lock);
348 ret = get_fan_auto_nearest(data, nr, val, data->conf1);
350 mutex_unlock(&data->update_lock);
354 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
355 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^
356 (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
357 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
359 * Switch to Auto Fan Mode
361 * Set PWM registers to 33% Both
363 data->old_pwm[0] = data->pwm[0];
364 data->old_pwm[1] = data->pwm[1];
365 adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
367 /* Switch to Manual Mode */
368 data->pwm[0] = data->old_pwm[0];
369 data->pwm[1] = data->old_pwm[1];
370 /* Restore PWM registers */
371 adm1031_write_value(client, ADM1031_REG_PWM,
372 data->pwm[0] | (data->pwm[1] << 4));
375 data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
376 adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
377 mutex_unlock(&data->update_lock);
381 static SENSOR_DEVICE_ATTR_RW(auto_fan1_channel, fan_auto_channel, 0);
382 static SENSOR_DEVICE_ATTR_RW(auto_fan2_channel, fan_auto_channel, 1);
385 static ssize_t auto_temp_off_show(struct device *dev,
386 struct device_attribute *attr, char *buf)
388 int nr = to_sensor_dev_attr(attr)->index;
389 struct adm1031_data *data = adm1031_update_device(dev);
390 return sprintf(buf, "%d\n",
391 AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
393 static ssize_t auto_temp_min_show(struct device *dev,
394 struct device_attribute *attr, char *buf)
396 int nr = to_sensor_dev_attr(attr)->index;
397 struct adm1031_data *data = adm1031_update_device(dev);
398 return sprintf(buf, "%d\n",
399 AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
402 auto_temp_min_store(struct device *dev, struct device_attribute *attr,
403 const char *buf, size_t count)
405 struct adm1031_data *data = dev_get_drvdata(dev);
406 struct i2c_client *client = data->client;
407 int nr = to_sensor_dev_attr(attr)->index;
411 ret = kstrtol(buf, 10, &val);
415 val = clamp_val(val, 0, 127000);
416 mutex_lock(&data->update_lock);
417 data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
418 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
419 data->auto_temp[nr]);
420 mutex_unlock(&data->update_lock);
423 static ssize_t auto_temp_max_show(struct device *dev,
424 struct device_attribute *attr, char *buf)
426 int nr = to_sensor_dev_attr(attr)->index;
427 struct adm1031_data *data = adm1031_update_device(dev);
428 return sprintf(buf, "%d\n",
429 AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
432 auto_temp_max_store(struct device *dev, struct device_attribute *attr,
433 const char *buf, size_t count)
435 struct adm1031_data *data = dev_get_drvdata(dev);
436 struct i2c_client *client = data->client;
437 int nr = to_sensor_dev_attr(attr)->index;
441 ret = kstrtol(buf, 10, &val);
445 val = clamp_val(val, 0, 127000);
446 mutex_lock(&data->update_lock);
447 data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr],
449 adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
451 mutex_unlock(&data->update_lock);
455 static SENSOR_DEVICE_ATTR_RO(auto_temp1_off, auto_temp_off, 0);
456 static SENSOR_DEVICE_ATTR_RW(auto_temp1_min, auto_temp_min, 0);
457 static SENSOR_DEVICE_ATTR_RW(auto_temp1_max, auto_temp_max, 0);
458 static SENSOR_DEVICE_ATTR_RO(auto_temp2_off, auto_temp_off, 1);
459 static SENSOR_DEVICE_ATTR_RW(auto_temp2_min, auto_temp_min, 1);
460 static SENSOR_DEVICE_ATTR_RW(auto_temp2_max, auto_temp_max, 1);
461 static SENSOR_DEVICE_ATTR_RO(auto_temp3_off, auto_temp_off, 2);
462 static SENSOR_DEVICE_ATTR_RW(auto_temp3_min, auto_temp_min, 2);
463 static SENSOR_DEVICE_ATTR_RW(auto_temp3_max, auto_temp_max, 2);
466 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
469 int nr = to_sensor_dev_attr(attr)->index;
470 struct adm1031_data *data = adm1031_update_device(dev);
471 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
473 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
474 const char *buf, size_t count)
476 struct adm1031_data *data = dev_get_drvdata(dev);
477 struct i2c_client *client = data->client;
478 int nr = to_sensor_dev_attr(attr)->index;
482 ret = kstrtol(buf, 10, &val);
486 mutex_lock(&data->update_lock);
487 if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
488 (((val>>4) & 0xf) != 5)) {
489 /* In automatic mode, the only PWM accepted is 33% */
490 mutex_unlock(&data->update_lock);
493 data->pwm[nr] = PWM_TO_REG(val);
494 reg = adm1031_read_value(client, ADM1031_REG_PWM);
495 adm1031_write_value(client, ADM1031_REG_PWM,
496 nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
497 : (data->pwm[nr] & 0xf) | (reg & 0xf0));
498 mutex_unlock(&data->update_lock);
502 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
503 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
504 static SENSOR_DEVICE_ATTR_RW(auto_fan1_min_pwm, pwm, 0);
505 static SENSOR_DEVICE_ATTR_RW(auto_fan2_min_pwm, pwm, 1);
510 * That function checks the cases where the fan reading is not
511 * relevant. It is used to provide 0 as fan reading when the fan is
512 * not supposed to run
514 static int trust_fan_readings(struct adm1031_data *data, int chan)
518 if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
519 switch (data->conf1 & 0x60) {
522 * remote temp1 controls fan1,
523 * remote temp2 controls fan2
525 res = data->temp[chan+1] >=
526 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
528 case 0x20: /* remote temp1 controls both fans */
531 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
533 case 0x40: /* remote temp2 controls both fans */
536 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
538 case 0x60: /* max controls both fans */
541 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
543 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
544 || (data->chip_type == adm1031
546 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
550 res = data->pwm[chan] > 0;
555 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
558 int nr = to_sensor_dev_attr(attr)->index;
559 struct adm1031_data *data = adm1031_update_device(dev);
562 value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
563 FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
564 return sprintf(buf, "%d\n", value);
567 static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
570 int nr = to_sensor_dev_attr(attr)->index;
571 struct adm1031_data *data = adm1031_update_device(dev);
572 return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
574 static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
577 int nr = to_sensor_dev_attr(attr)->index;
578 struct adm1031_data *data = adm1031_update_device(dev);
579 return sprintf(buf, "%d\n",
580 FAN_FROM_REG(data->fan_min[nr],
581 FAN_DIV_FROM_REG(data->fan_div[nr])));
583 static ssize_t fan_min_store(struct device *dev,
584 struct device_attribute *attr, const char *buf,
587 struct adm1031_data *data = dev_get_drvdata(dev);
588 struct i2c_client *client = data->client;
589 int nr = to_sensor_dev_attr(attr)->index;
593 ret = kstrtol(buf, 10, &val);
597 mutex_lock(&data->update_lock);
600 FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
602 data->fan_min[nr] = 0xff;
604 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
605 mutex_unlock(&data->update_lock);
608 static ssize_t fan_div_store(struct device *dev,
609 struct device_attribute *attr, const char *buf,
612 struct adm1031_data *data = dev_get_drvdata(dev);
613 struct i2c_client *client = data->client;
614 int nr = to_sensor_dev_attr(attr)->index;
621 ret = kstrtol(buf, 10, &val);
625 tmp = val == 8 ? 0xc0 :
633 mutex_lock(&data->update_lock);
634 /* Get fresh readings */
635 data->fan_div[nr] = adm1031_read_value(client,
636 ADM1031_REG_FAN_DIV(nr));
637 data->fan_min[nr] = adm1031_read_value(client,
638 ADM1031_REG_FAN_MIN(nr));
640 /* Write the new clock divider and fan min */
641 old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
642 data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]);
643 new_min = data->fan_min[nr] * old_div / val;
644 data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
646 adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
648 adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
651 /* Invalidate the cache: fan speed is no longer valid */
653 mutex_unlock(&data->update_lock);
657 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
658 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
659 static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
660 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
661 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
662 static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
665 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
668 int nr = to_sensor_dev_attr(attr)->index;
669 struct adm1031_data *data = adm1031_update_device(dev);
672 ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
673 (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
674 return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
676 static ssize_t temp_offset_show(struct device *dev,
677 struct device_attribute *attr, char *buf)
679 int nr = to_sensor_dev_attr(attr)->index;
680 struct adm1031_data *data = adm1031_update_device(dev);
681 return sprintf(buf, "%d\n",
682 TEMP_OFFSET_FROM_REG(data->temp_offset[nr]));
684 static ssize_t temp_min_show(struct device *dev,
685 struct device_attribute *attr, char *buf)
687 int nr = to_sensor_dev_attr(attr)->index;
688 struct adm1031_data *data = adm1031_update_device(dev);
689 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
691 static ssize_t temp_max_show(struct device *dev,
692 struct device_attribute *attr, char *buf)
694 int nr = to_sensor_dev_attr(attr)->index;
695 struct adm1031_data *data = adm1031_update_device(dev);
696 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
698 static ssize_t temp_crit_show(struct device *dev,
699 struct device_attribute *attr, char *buf)
701 int nr = to_sensor_dev_attr(attr)->index;
702 struct adm1031_data *data = adm1031_update_device(dev);
703 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
705 static ssize_t temp_offset_store(struct device *dev,
706 struct device_attribute *attr,
707 const char *buf, size_t count)
709 struct adm1031_data *data = dev_get_drvdata(dev);
710 struct i2c_client *client = data->client;
711 int nr = to_sensor_dev_attr(attr)->index;
715 ret = kstrtol(buf, 10, &val);
719 val = clamp_val(val, -15000, 15000);
720 mutex_lock(&data->update_lock);
721 data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val);
722 adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr),
723 data->temp_offset[nr]);
724 mutex_unlock(&data->update_lock);
727 static ssize_t temp_min_store(struct device *dev,
728 struct device_attribute *attr, const char *buf,
731 struct adm1031_data *data = dev_get_drvdata(dev);
732 struct i2c_client *client = data->client;
733 int nr = to_sensor_dev_attr(attr)->index;
737 ret = kstrtol(buf, 10, &val);
741 val = clamp_val(val, -55000, 127000);
742 mutex_lock(&data->update_lock);
743 data->temp_min[nr] = TEMP_TO_REG(val);
744 adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
746 mutex_unlock(&data->update_lock);
749 static ssize_t temp_max_store(struct device *dev,
750 struct device_attribute *attr, const char *buf,
753 struct adm1031_data *data = dev_get_drvdata(dev);
754 struct i2c_client *client = data->client;
755 int nr = to_sensor_dev_attr(attr)->index;
759 ret = kstrtol(buf, 10, &val);
763 val = clamp_val(val, -55000, 127000);
764 mutex_lock(&data->update_lock);
765 data->temp_max[nr] = TEMP_TO_REG(val);
766 adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
768 mutex_unlock(&data->update_lock);
771 static ssize_t temp_crit_store(struct device *dev,
772 struct device_attribute *attr, const char *buf,
775 struct adm1031_data *data = dev_get_drvdata(dev);
776 struct i2c_client *client = data->client;
777 int nr = to_sensor_dev_attr(attr)->index;
781 ret = kstrtol(buf, 10, &val);
785 val = clamp_val(val, -55000, 127000);
786 mutex_lock(&data->update_lock);
787 data->temp_crit[nr] = TEMP_TO_REG(val);
788 adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
789 data->temp_crit[nr]);
790 mutex_unlock(&data->update_lock);
794 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
795 static SENSOR_DEVICE_ATTR_RW(temp1_offset, temp_offset, 0);
796 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
797 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
798 static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp_crit, 0);
799 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
800 static SENSOR_DEVICE_ATTR_RW(temp2_offset, temp_offset, 1);
801 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
802 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
803 static SENSOR_DEVICE_ATTR_RW(temp2_crit, temp_crit, 1);
804 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
805 static SENSOR_DEVICE_ATTR_RW(temp3_offset, temp_offset, 2);
806 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
807 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
808 static SENSOR_DEVICE_ATTR_RW(temp3_crit, temp_crit, 2);
811 static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
814 struct adm1031_data *data = adm1031_update_device(dev);
815 return sprintf(buf, "%d\n", data->alarm);
818 static DEVICE_ATTR_RO(alarms);
820 static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
823 int bitnr = to_sensor_dev_attr(attr)->index;
824 struct adm1031_data *data = adm1031_update_device(dev);
825 return sprintf(buf, "%d\n", (data->alarm >> bitnr) & 1);
828 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 0);
829 static SENSOR_DEVICE_ATTR_RO(fan1_fault, alarm, 1);
830 static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, alarm, 2);
831 static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, alarm, 3);
832 static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, alarm, 4);
833 static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 5);
834 static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 6);
835 static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, alarm, 7);
836 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 8);
837 static SENSOR_DEVICE_ATTR_RO(fan2_fault, alarm, 9);
838 static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, alarm, 10);
839 static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, alarm, 11);
840 static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, alarm, 12);
841 static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 13);
842 static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 14);
844 /* Update Interval */
845 static const unsigned int update_intervals[] = {
846 16000, 8000, 4000, 2000, 1000, 500, 250, 125,
849 static ssize_t update_interval_show(struct device *dev,
850 struct device_attribute *attr, char *buf)
852 struct adm1031_data *data = dev_get_drvdata(dev);
854 return sprintf(buf, "%u\n", data->update_interval);
857 static ssize_t update_interval_store(struct device *dev,
858 struct device_attribute *attr,
859 const char *buf, size_t count)
861 struct adm1031_data *data = dev_get_drvdata(dev);
862 struct i2c_client *client = data->client;
867 err = kstrtoul(buf, 10, &val);
872 * Find the nearest update interval from the table.
873 * Use it to determine the matching update rate.
875 for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) {
876 if (val >= update_intervals[i])
879 /* if not found, we point to the last entry (lowest update interval) */
881 /* set the new update rate while preserving other settings */
882 reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
883 reg &= ~ADM1031_UPDATE_RATE_MASK;
884 reg |= i << ADM1031_UPDATE_RATE_SHIFT;
885 adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg);
887 mutex_lock(&data->update_lock);
888 data->update_interval = update_intervals[i];
889 mutex_unlock(&data->update_lock);
894 static DEVICE_ATTR_RW(update_interval);
896 static struct attribute *adm1031_attributes[] = {
897 &sensor_dev_attr_fan1_input.dev_attr.attr,
898 &sensor_dev_attr_fan1_div.dev_attr.attr,
899 &sensor_dev_attr_fan1_min.dev_attr.attr,
900 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
901 &sensor_dev_attr_fan1_fault.dev_attr.attr,
902 &sensor_dev_attr_pwm1.dev_attr.attr,
903 &sensor_dev_attr_auto_fan1_channel.dev_attr.attr,
904 &sensor_dev_attr_temp1_input.dev_attr.attr,
905 &sensor_dev_attr_temp1_offset.dev_attr.attr,
906 &sensor_dev_attr_temp1_min.dev_attr.attr,
907 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
908 &sensor_dev_attr_temp1_max.dev_attr.attr,
909 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
910 &sensor_dev_attr_temp1_crit.dev_attr.attr,
911 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
912 &sensor_dev_attr_temp2_input.dev_attr.attr,
913 &sensor_dev_attr_temp2_offset.dev_attr.attr,
914 &sensor_dev_attr_temp2_min.dev_attr.attr,
915 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
916 &sensor_dev_attr_temp2_max.dev_attr.attr,
917 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
918 &sensor_dev_attr_temp2_crit.dev_attr.attr,
919 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
920 &sensor_dev_attr_temp2_fault.dev_attr.attr,
922 &sensor_dev_attr_auto_temp1_off.dev_attr.attr,
923 &sensor_dev_attr_auto_temp1_min.dev_attr.attr,
924 &sensor_dev_attr_auto_temp1_max.dev_attr.attr,
926 &sensor_dev_attr_auto_temp2_off.dev_attr.attr,
927 &sensor_dev_attr_auto_temp2_min.dev_attr.attr,
928 &sensor_dev_attr_auto_temp2_max.dev_attr.attr,
930 &sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr,
932 &dev_attr_update_interval.attr,
933 &dev_attr_alarms.attr,
938 static const struct attribute_group adm1031_group = {
939 .attrs = adm1031_attributes,
942 static struct attribute *adm1031_attributes_opt[] = {
943 &sensor_dev_attr_fan2_input.dev_attr.attr,
944 &sensor_dev_attr_fan2_div.dev_attr.attr,
945 &sensor_dev_attr_fan2_min.dev_attr.attr,
946 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
947 &sensor_dev_attr_fan2_fault.dev_attr.attr,
948 &sensor_dev_attr_pwm2.dev_attr.attr,
949 &sensor_dev_attr_auto_fan2_channel.dev_attr.attr,
950 &sensor_dev_attr_temp3_input.dev_attr.attr,
951 &sensor_dev_attr_temp3_offset.dev_attr.attr,
952 &sensor_dev_attr_temp3_min.dev_attr.attr,
953 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
954 &sensor_dev_attr_temp3_max.dev_attr.attr,
955 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
956 &sensor_dev_attr_temp3_crit.dev_attr.attr,
957 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
958 &sensor_dev_attr_temp3_fault.dev_attr.attr,
959 &sensor_dev_attr_auto_temp3_off.dev_attr.attr,
960 &sensor_dev_attr_auto_temp3_min.dev_attr.attr,
961 &sensor_dev_attr_auto_temp3_max.dev_attr.attr,
962 &sensor_dev_attr_auto_fan2_min_pwm.dev_attr.attr,
966 static const struct attribute_group adm1031_group_opt = {
967 .attrs = adm1031_attributes_opt,
970 /* Return 0 if detection is successful, -ENODEV otherwise */
971 static int adm1031_detect(struct i2c_client *client,
972 struct i2c_board_info *info)
974 struct i2c_adapter *adapter = client->adapter;
978 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
981 id = i2c_smbus_read_byte_data(client, 0x3d);
982 co = i2c_smbus_read_byte_data(client, 0x3e);
984 if (!((id == 0x31 || id == 0x30) && co == 0x41))
986 name = (id == 0x30) ? "adm1030" : "adm1031";
988 strscpy(info->type, name, I2C_NAME_SIZE);
993 static void adm1031_init_client(struct i2c_client *client)
995 unsigned int read_val;
998 struct adm1031_data *data = i2c_get_clientdata(client);
1000 mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
1001 if (data->chip_type == adm1031) {
1002 mask |= (ADM1031_CONF2_PWM2_ENABLE |
1003 ADM1031_CONF2_TACH2_ENABLE);
1005 /* Initialize the ADM1031 chip (enables fan speed reading ) */
1006 read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
1007 if ((read_val | mask) != read_val)
1008 adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
1010 read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
1011 if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
1012 adm1031_write_value(client, ADM1031_REG_CONF1,
1013 read_val | ADM1031_CONF1_MONITOR_ENABLE);
1016 /* Read the chip's update rate */
1017 mask = ADM1031_UPDATE_RATE_MASK;
1018 read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
1019 i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT;
1020 /* Save it as update interval */
1021 data->update_interval = update_intervals[i];
1024 static const struct i2c_device_id adm1031_id[];
1026 static int adm1031_probe(struct i2c_client *client)
1028 struct device *dev = &client->dev;
1029 struct device *hwmon_dev;
1030 struct adm1031_data *data;
1032 data = devm_kzalloc(dev, sizeof(struct adm1031_data), GFP_KERNEL);
1036 i2c_set_clientdata(client, data);
1037 data->client = client;
1038 data->chip_type = i2c_match_id(adm1031_id, client)->driver_data;
1039 mutex_init(&data->update_lock);
1041 if (data->chip_type == adm1030)
1042 data->chan_select_table = &auto_channel_select_table_adm1030;
1044 data->chan_select_table = &auto_channel_select_table_adm1031;
1046 /* Initialize the ADM1031 chip */
1047 adm1031_init_client(client);
1050 data->groups[0] = &adm1031_group;
1051 if (data->chip_type == adm1031)
1052 data->groups[1] = &adm1031_group_opt;
1054 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1055 data, data->groups);
1056 return PTR_ERR_OR_ZERO(hwmon_dev);
1059 static const struct i2c_device_id adm1031_id[] = {
1060 { "adm1030", adm1030 },
1061 { "adm1031", adm1031 },
1064 MODULE_DEVICE_TABLE(i2c, adm1031_id);
1066 static struct i2c_driver adm1031_driver = {
1067 .class = I2C_CLASS_HWMON,
1071 .probe_new = adm1031_probe,
1072 .id_table = adm1031_id,
1073 .detect = adm1031_detect,
1074 .address_list = normal_i2c,
1077 module_i2c_driver(adm1031_driver);
1079 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
1080 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
1081 MODULE_LICENSE("GPL");