2 lm85.c - Part of lm_sensors, Linux kernel modules for hardware
4 Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
5 Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
6 Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de>
7 Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
8 Copyright (C) 2007, 2008 Jean Delvare <khali@linux-fr.org>
10 Chip details at <http://www.national.com/ds/LM/LM85.pdf>
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/jiffies.h>
31 #include <linux/i2c.h>
32 #include <linux/hwmon.h>
33 #include <linux/hwmon-vid.h>
34 #include <linux/hwmon-sysfs.h>
35 #include <linux/err.h>
36 #include <linux/mutex.h>
38 /* Addresses to scan */
39 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
41 /* Insmod parameters */
42 I2C_CLIENT_INSMOD_6(lm85b, lm85c, adm1027, adt7463, emc6d100, emc6d102);
44 /* The LM85 registers */
46 #define LM85_REG_IN(nr) (0x20 + (nr))
47 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2)
48 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2)
50 #define LM85_REG_TEMP(nr) (0x25 + (nr))
51 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2)
52 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2)
54 /* Fan speeds are LSB, MSB (2 bytes) */
55 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2)
56 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2)
58 #define LM85_REG_PWM(nr) (0x30 + (nr))
60 #define LM85_REG_COMPANY 0x3e
61 #define LM85_REG_VERSTEP 0x3f
62 /* These are the recognized values for the above regs */
63 #define LM85_COMPANY_NATIONAL 0x01
64 #define LM85_COMPANY_ANALOG_DEV 0x41
65 #define LM85_COMPANY_SMSC 0x5c
66 #define LM85_VERSTEP_VMASK 0xf0
67 #define LM85_VERSTEP_GENERIC 0x60
68 #define LM85_VERSTEP_LM85C 0x60
69 #define LM85_VERSTEP_LM85B 0x62
70 #define LM85_VERSTEP_ADM1027 0x60
71 #define LM85_VERSTEP_ADT7463 0x62
72 #define LM85_VERSTEP_ADT7463C 0x6A
73 #define LM85_VERSTEP_EMC6D100_A0 0x60
74 #define LM85_VERSTEP_EMC6D100_A1 0x61
75 #define LM85_VERSTEP_EMC6D102 0x65
77 #define LM85_REG_CONFIG 0x40
79 #define LM85_REG_ALARM1 0x41
80 #define LM85_REG_ALARM2 0x42
82 #define LM85_REG_VID 0x43
84 /* Automated FAN control */
85 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr))
86 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr))
87 #define LM85_REG_AFAN_SPIKE1 0x62
88 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr))
89 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr))
90 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr))
91 #define LM85_REG_AFAN_HYST1 0x6d
92 #define LM85_REG_AFAN_HYST2 0x6e
94 #define ADM1027_REG_EXTEND_ADC1 0x76
95 #define ADM1027_REG_EXTEND_ADC2 0x77
97 #define EMC6D100_REG_ALARM3 0x7d
98 /* IN5, IN6 and IN7 */
99 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5))
100 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2)
101 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2)
102 #define EMC6D102_REG_EXTEND_ADC1 0x85
103 #define EMC6D102_REG_EXTEND_ADC2 0x86
104 #define EMC6D102_REG_EXTEND_ADC3 0x87
105 #define EMC6D102_REG_EXTEND_ADC4 0x88
108 /* Conversions. Rounding and limit checking is only done on the TO_REG
109 variants. Note that you should be a bit careful with which arguments
110 these macros are called: arguments may be evaluated more than once.
113 /* IN are scaled acording to built-in resistors */
114 static const int lm85_scaling[] = { /* .001 Volts */
115 2500, 2250, 3300, 5000, 12000,
116 3300, 1500, 1800 /*EMC6D100*/
118 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
120 #define INS_TO_REG(n, val) \
121 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255)
123 #define INSEXT_FROM_REG(n, val, ext) \
124 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])
126 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n])
128 /* FAN speed is measured using 90kHz clock */
129 static inline u16 FAN_TO_REG(unsigned long val)
133 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe);
135 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
138 /* Temperature is reported in .001 degC increments */
139 #define TEMP_TO_REG(val) \
140 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127)
141 #define TEMPEXT_FROM_REG(val, ext) \
142 SCALE(((val) << 4) + (ext), 16, 1000)
143 #define TEMP_FROM_REG(val) ((val) * 1000)
145 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255)
146 #define PWM_FROM_REG(val) (val)
149 /* ZONEs have the following parameters:
150 * Limit (low) temp, 1. degC
151 * Hysteresis (below limit), 1. degC (0-15)
152 * Range of speed control, .1 degC (2-80)
153 * Critical (high) temp, 1. degC
155 * FAN PWMs have the following parameters:
156 * Reference Zone, 1, 2, 3, etc.
157 * Spinup time, .05 sec
158 * PWM value at limit/low temp, 1 count
159 * PWM Frequency, 1. Hz
160 * PWM is Min or OFF below limit, flag
161 * Invert PWM output, flag
163 * Some chips filter the temp, others the fan.
164 * Filter constant (or disabled) .1 seconds
167 /* These are the zone temperature range encodings in .001 degree C */
168 static const int lm85_range_map[] = {
169 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
170 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
173 static int RANGE_TO_REG(int range)
177 if (range >= lm85_range_map[15])
180 /* Find the closest match */
181 for (i = 14; i >= 0; --i) {
182 if (range >= lm85_range_map[i]) {
183 if ((lm85_range_map[i + 1] - range) <
184 (range - lm85_range_map[i]))
192 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
194 /* These are the PWM frequency encodings */
195 static const int lm85_freq_map[8] = { /* 1 Hz */
196 10, 15, 23, 30, 38, 47, 61, 94
198 static const int adm1027_freq_map[8] = { /* 1 Hz */
199 11, 15, 22, 29, 35, 44, 59, 88
202 static int FREQ_TO_REG(const int *map, int freq)
206 /* Find the closest match */
207 for (i = 0; i < 7; ++i)
208 if (freq <= (map[i] + map[i + 1]) / 2)
213 static int FREQ_FROM_REG(const int *map, u8 reg)
215 return map[reg & 0x07];
218 /* Since we can't use strings, I'm abusing these numbers
219 * to stand in for the following meanings:
220 * 1 -- PWM responds to Zone 1
221 * 2 -- PWM responds to Zone 2
222 * 3 -- PWM responds to Zone 3
223 * 23 -- PWM responds to the higher temp of Zone 2 or 3
224 * 123 -- PWM responds to highest of Zone 1, 2, or 3
225 * 0 -- PWM is always at 0% (ie, off)
226 * -1 -- PWM is always at 100%
227 * -2 -- PWM responds to manual control
230 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
231 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5]
233 static int ZONE_TO_REG(int zone)
237 for (i = 0; i <= 7; ++i)
238 if (zone == lm85_zone_map[i])
240 if (i > 7) /* Not found. */
241 i = 3; /* Always 100% */
245 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15)
246 #define HYST_FROM_REG(val) ((val) * 1000)
248 /* Chip sampling rates
250 * Some sensors are not updated more frequently than once per second
251 * so it doesn't make sense to read them more often than that.
252 * We cache the results and return the saved data if the driver
253 * is called again before a second has elapsed.
255 * Also, there is significant configuration data for this chip
256 * given the automatic PWM fan control that is possible. There
257 * are about 47 bytes of config data to only 22 bytes of actual
258 * readings. So, we keep the config data up to date in the cache
259 * when it is written and only sample it once every 1 *minute*
261 #define LM85_DATA_INTERVAL (HZ + HZ / 2)
262 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ)
264 /* LM85 can automatically adjust fan speeds based on temperature
265 * This structure encapsulates an entire Zone config. There are
266 * three zones (one for each temperature input) on the lm85
269 s8 limit; /* Low temp limit */
270 u8 hyst; /* Low limit hysteresis. (0-15) */
271 u8 range; /* Temp range, encoded */
272 s8 critical; /* "All fans ON" temp limit */
273 u8 off_desired; /* Actual "off" temperature specified. Preserved
274 * to prevent "drift" as other autofan control
277 u8 max_desired; /* Actual "max" temperature specified. Preserved
278 * to prevent "drift" as other autofan control
283 struct lm85_autofan {
284 u8 config; /* Register value */
285 u8 min_pwm; /* Minimum PWM value, encoded */
286 u8 min_off; /* Min PWM or OFF below "limit", flag */
289 /* For each registered chip, we need to keep some data in memory.
290 The structure is dynamically allocated. */
292 struct device *hwmon_dev;
296 struct mutex update_lock;
297 int valid; /* !=0 if following fields are valid */
298 unsigned long last_reading; /* In jiffies */
299 unsigned long last_config; /* In jiffies */
301 u8 in[8]; /* Register value */
302 u8 in_max[8]; /* Register value */
303 u8 in_min[8]; /* Register value */
304 s8 temp[3]; /* Register value */
305 s8 temp_min[3]; /* Register value */
306 s8 temp_max[3]; /* Register value */
307 u16 fan[4]; /* Register value */
308 u16 fan_min[4]; /* Register value */
309 u8 pwm[3]; /* Register value */
310 u8 pwm_freq[3]; /* Register encoding */
311 u8 temp_ext[3]; /* Decoded values */
312 u8 in_ext[8]; /* Decoded values */
313 u8 vid; /* Register value */
314 u8 vrm; /* VRM version */
315 u32 alarms; /* Register encoding, combined */
316 struct lm85_autofan autofan[3];
317 struct lm85_zone zone[3];
320 static int lm85_detect(struct i2c_client *client, int kind,
321 struct i2c_board_info *info);
322 static int lm85_probe(struct i2c_client *client,
323 const struct i2c_device_id *id);
324 static int lm85_remove(struct i2c_client *client);
326 static int lm85_read_value(struct i2c_client *client, u8 reg);
327 static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
328 static struct lm85_data *lm85_update_device(struct device *dev);
331 static const struct i2c_device_id lm85_id[] = {
332 { "adm1027", adm1027 },
333 { "adt7463", adt7463 },
334 { "lm85", any_chip },
337 { "emc6d100", emc6d100 },
338 { "emc6d101", emc6d100 },
339 { "emc6d102", emc6d102 },
342 MODULE_DEVICE_TABLE(i2c, lm85_id);
344 static struct i2c_driver lm85_driver = {
345 .class = I2C_CLASS_HWMON,
350 .remove = lm85_remove,
352 .detect = lm85_detect,
353 .address_data = &addr_data,
358 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
361 int nr = to_sensor_dev_attr(attr)->index;
362 struct lm85_data *data = lm85_update_device(dev);
363 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
366 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
369 int nr = to_sensor_dev_attr(attr)->index;
370 struct lm85_data *data = lm85_update_device(dev);
371 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr]));
374 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
375 const char *buf, size_t count)
377 int nr = to_sensor_dev_attr(attr)->index;
378 struct i2c_client *client = to_i2c_client(dev);
379 struct lm85_data *data = i2c_get_clientdata(client);
380 unsigned long val = simple_strtoul(buf, NULL, 10);
382 mutex_lock(&data->update_lock);
383 data->fan_min[nr] = FAN_TO_REG(val);
384 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
385 mutex_unlock(&data->update_lock);
389 #define show_fan_offset(offset) \
390 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
391 show_fan, NULL, offset - 1); \
392 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
393 show_fan_min, set_fan_min, offset - 1)
400 /* vid, vrm, alarms */
402 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
405 struct lm85_data *data = lm85_update_device(dev);
408 if (data->type == adt7463 && (data->vid & 0x80)) {
409 /* 6-pin VID (VRM 10) */
410 vid = vid_from_reg(data->vid & 0x3f, data->vrm);
412 /* 5-pin VID (VRM 9) */
413 vid = vid_from_reg(data->vid & 0x1f, data->vrm);
416 return sprintf(buf, "%d\n", vid);
419 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
421 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
424 struct lm85_data *data = dev_get_drvdata(dev);
425 return sprintf(buf, "%ld\n", (long) data->vrm);
428 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
429 const char *buf, size_t count)
431 struct lm85_data *data = dev_get_drvdata(dev);
432 data->vrm = simple_strtoul(buf, NULL, 10);
436 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
438 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
441 struct lm85_data *data = lm85_update_device(dev);
442 return sprintf(buf, "%u\n", data->alarms);
445 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
447 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
450 int nr = to_sensor_dev_attr(attr)->index;
451 struct lm85_data *data = lm85_update_device(dev);
452 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
455 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
456 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
457 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
458 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
459 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
460 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
461 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
462 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
463 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
464 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
465 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
466 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
467 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
468 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
469 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
470 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
471 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
475 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
478 int nr = to_sensor_dev_attr(attr)->index;
479 struct lm85_data *data = lm85_update_device(dev);
480 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
483 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
484 const char *buf, size_t count)
486 int nr = to_sensor_dev_attr(attr)->index;
487 struct i2c_client *client = to_i2c_client(dev);
488 struct lm85_data *data = i2c_get_clientdata(client);
489 long val = simple_strtol(buf, NULL, 10);
491 mutex_lock(&data->update_lock);
492 data->pwm[nr] = PWM_TO_REG(val);
493 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
494 mutex_unlock(&data->update_lock);
498 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
501 int nr = to_sensor_dev_attr(attr)->index;
502 struct lm85_data *data = lm85_update_device(dev);
503 int pwm_zone, enable;
505 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
507 case -1: /* PWM is always at 100% */
510 case 0: /* PWM is always at 0% */
511 case -2: /* PWM responds to manual control */
514 default: /* PWM in automatic mode */
517 return sprintf(buf, "%d\n", enable);
520 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
521 *attr, const char *buf, size_t count)
523 int nr = to_sensor_dev_attr(attr)->index;
524 struct i2c_client *client = to_i2c_client(dev);
525 struct lm85_data *data = i2c_get_clientdata(client);
526 long val = simple_strtol(buf, NULL, 10);
537 /* Here we have to choose arbitrarily one of the 5 possible
538 configurations; I go for the safest */
545 mutex_lock(&data->update_lock);
546 data->autofan[nr].config = lm85_read_value(client,
547 LM85_REG_AFAN_CONFIG(nr));
548 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
550 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
551 data->autofan[nr].config);
552 mutex_unlock(&data->update_lock);
556 static ssize_t show_pwm_freq(struct device *dev,
557 struct device_attribute *attr, char *buf)
559 int nr = to_sensor_dev_attr(attr)->index;
560 struct lm85_data *data = lm85_update_device(dev);
561 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map,
562 data->pwm_freq[nr]));
565 static ssize_t set_pwm_freq(struct device *dev,
566 struct device_attribute *attr, const char *buf, size_t count)
568 int nr = to_sensor_dev_attr(attr)->index;
569 struct i2c_client *client = to_i2c_client(dev);
570 struct lm85_data *data = i2c_get_clientdata(client);
571 long val = simple_strtol(buf, NULL, 10);
573 mutex_lock(&data->update_lock);
574 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
575 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
576 (data->zone[nr].range << 4)
577 | data->pwm_freq[nr]);
578 mutex_unlock(&data->update_lock);
582 #define show_pwm_reg(offset) \
583 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
584 show_pwm, set_pwm, offset - 1); \
585 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
586 show_pwm_enable, set_pwm_enable, offset - 1); \
587 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
588 show_pwm_freq, set_pwm_freq, offset - 1)
596 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
599 int nr = to_sensor_dev_attr(attr)->index;
600 struct lm85_data *data = lm85_update_device(dev);
601 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
605 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
608 int nr = to_sensor_dev_attr(attr)->index;
609 struct lm85_data *data = lm85_update_device(dev);
610 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
613 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
614 const char *buf, size_t count)
616 int nr = to_sensor_dev_attr(attr)->index;
617 struct i2c_client *client = to_i2c_client(dev);
618 struct lm85_data *data = i2c_get_clientdata(client);
619 long val = simple_strtol(buf, NULL, 10);
621 mutex_lock(&data->update_lock);
622 data->in_min[nr] = INS_TO_REG(nr, val);
623 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
624 mutex_unlock(&data->update_lock);
628 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
631 int nr = to_sensor_dev_attr(attr)->index;
632 struct lm85_data *data = lm85_update_device(dev);
633 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
636 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
637 const char *buf, size_t count)
639 int nr = to_sensor_dev_attr(attr)->index;
640 struct i2c_client *client = to_i2c_client(dev);
641 struct lm85_data *data = i2c_get_clientdata(client);
642 long val = simple_strtol(buf, NULL, 10);
644 mutex_lock(&data->update_lock);
645 data->in_max[nr] = INS_TO_REG(nr, val);
646 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
647 mutex_unlock(&data->update_lock);
651 #define show_in_reg(offset) \
652 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
653 show_in, NULL, offset); \
654 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
655 show_in_min, set_in_min, offset); \
656 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
657 show_in_max, set_in_max, offset)
670 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
673 int nr = to_sensor_dev_attr(attr)->index;
674 struct lm85_data *data = lm85_update_device(dev);
675 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
676 data->temp_ext[nr]));
679 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
682 int nr = to_sensor_dev_attr(attr)->index;
683 struct lm85_data *data = lm85_update_device(dev);
684 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
687 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
688 const char *buf, size_t count)
690 int nr = to_sensor_dev_attr(attr)->index;
691 struct i2c_client *client = to_i2c_client(dev);
692 struct lm85_data *data = i2c_get_clientdata(client);
693 long val = simple_strtol(buf, NULL, 10);
695 mutex_lock(&data->update_lock);
696 data->temp_min[nr] = TEMP_TO_REG(val);
697 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
698 mutex_unlock(&data->update_lock);
702 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
705 int nr = to_sensor_dev_attr(attr)->index;
706 struct lm85_data *data = lm85_update_device(dev);
707 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
710 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
711 const char *buf, size_t count)
713 int nr = to_sensor_dev_attr(attr)->index;
714 struct i2c_client *client = to_i2c_client(dev);
715 struct lm85_data *data = i2c_get_clientdata(client);
716 long val = simple_strtol(buf, NULL, 10);
718 mutex_lock(&data->update_lock);
719 data->temp_max[nr] = TEMP_TO_REG(val);
720 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
721 mutex_unlock(&data->update_lock);
725 #define show_temp_reg(offset) \
726 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
727 show_temp, NULL, offset - 1); \
728 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
729 show_temp_min, set_temp_min, offset - 1); \
730 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
731 show_temp_max, set_temp_max, offset - 1);
738 /* Automatic PWM control */
740 static ssize_t show_pwm_auto_channels(struct device *dev,
741 struct device_attribute *attr, char *buf)
743 int nr = to_sensor_dev_attr(attr)->index;
744 struct lm85_data *data = lm85_update_device(dev);
745 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
748 static ssize_t set_pwm_auto_channels(struct device *dev,
749 struct device_attribute *attr, const char *buf, size_t count)
751 int nr = to_sensor_dev_attr(attr)->index;
752 struct i2c_client *client = to_i2c_client(dev);
753 struct lm85_data *data = i2c_get_clientdata(client);
754 long val = simple_strtol(buf, NULL, 10);
756 mutex_lock(&data->update_lock);
757 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
759 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
760 data->autofan[nr].config);
761 mutex_unlock(&data->update_lock);
765 static ssize_t show_pwm_auto_pwm_min(struct device *dev,
766 struct device_attribute *attr, char *buf)
768 int nr = to_sensor_dev_attr(attr)->index;
769 struct lm85_data *data = lm85_update_device(dev);
770 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
773 static ssize_t set_pwm_auto_pwm_min(struct device *dev,
774 struct device_attribute *attr, const char *buf, size_t count)
776 int nr = to_sensor_dev_attr(attr)->index;
777 struct i2c_client *client = to_i2c_client(dev);
778 struct lm85_data *data = i2c_get_clientdata(client);
779 long val = simple_strtol(buf, NULL, 10);
781 mutex_lock(&data->update_lock);
782 data->autofan[nr].min_pwm = PWM_TO_REG(val);
783 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
784 data->autofan[nr].min_pwm);
785 mutex_unlock(&data->update_lock);
789 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
790 struct device_attribute *attr, char *buf)
792 int nr = to_sensor_dev_attr(attr)->index;
793 struct lm85_data *data = lm85_update_device(dev);
794 return sprintf(buf, "%d\n", data->autofan[nr].min_off);
797 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
798 struct device_attribute *attr, const char *buf, size_t count)
800 int nr = to_sensor_dev_attr(attr)->index;
801 struct i2c_client *client = to_i2c_client(dev);
802 struct lm85_data *data = i2c_get_clientdata(client);
803 long val = simple_strtol(buf, NULL, 10);
806 mutex_lock(&data->update_lock);
807 data->autofan[nr].min_off = val;
808 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
809 tmp &= ~(0x20 << nr);
810 if (data->autofan[nr].min_off)
812 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
813 mutex_unlock(&data->update_lock);
817 #define pwm_auto(offset) \
818 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
819 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
820 set_pwm_auto_channels, offset - 1); \
821 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
822 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \
823 set_pwm_auto_pwm_min, offset - 1); \
824 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
825 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
826 set_pwm_auto_pwm_minctl, offset - 1)
832 /* Temperature settings for automatic PWM control */
834 static ssize_t show_temp_auto_temp_off(struct device *dev,
835 struct device_attribute *attr, char *buf)
837 int nr = to_sensor_dev_attr(attr)->index;
838 struct lm85_data *data = lm85_update_device(dev);
839 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
840 HYST_FROM_REG(data->zone[nr].hyst));
843 static ssize_t set_temp_auto_temp_off(struct device *dev,
844 struct device_attribute *attr, const char *buf, size_t count)
846 int nr = to_sensor_dev_attr(attr)->index;
847 struct i2c_client *client = to_i2c_client(dev);
848 struct lm85_data *data = i2c_get_clientdata(client);
850 long val = simple_strtol(buf, NULL, 10);
852 mutex_lock(&data->update_lock);
853 min = TEMP_FROM_REG(data->zone[nr].limit);
854 data->zone[nr].off_desired = TEMP_TO_REG(val);
855 data->zone[nr].hyst = HYST_TO_REG(min - val);
856 if (nr == 0 || nr == 1) {
857 lm85_write_value(client, LM85_REG_AFAN_HYST1,
858 (data->zone[0].hyst << 4)
859 | data->zone[1].hyst);
861 lm85_write_value(client, LM85_REG_AFAN_HYST2,
862 (data->zone[2].hyst << 4));
864 mutex_unlock(&data->update_lock);
868 static ssize_t show_temp_auto_temp_min(struct device *dev,
869 struct device_attribute *attr, char *buf)
871 int nr = to_sensor_dev_attr(attr)->index;
872 struct lm85_data *data = lm85_update_device(dev);
873 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
876 static ssize_t set_temp_auto_temp_min(struct device *dev,
877 struct device_attribute *attr, const char *buf, size_t count)
879 int nr = to_sensor_dev_attr(attr)->index;
880 struct i2c_client *client = to_i2c_client(dev);
881 struct lm85_data *data = i2c_get_clientdata(client);
882 long val = simple_strtol(buf, NULL, 10);
884 mutex_lock(&data->update_lock);
885 data->zone[nr].limit = TEMP_TO_REG(val);
886 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
887 data->zone[nr].limit);
889 /* Update temp_auto_max and temp_auto_range */
890 data->zone[nr].range = RANGE_TO_REG(
891 TEMP_FROM_REG(data->zone[nr].max_desired) -
892 TEMP_FROM_REG(data->zone[nr].limit));
893 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
894 ((data->zone[nr].range & 0x0f) << 4)
895 | (data->pwm_freq[nr] & 0x07));
897 /* Update temp_auto_hyst and temp_auto_off */
898 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
899 data->zone[nr].limit) - TEMP_FROM_REG(
900 data->zone[nr].off_desired));
901 if (nr == 0 || nr == 1) {
902 lm85_write_value(client, LM85_REG_AFAN_HYST1,
903 (data->zone[0].hyst << 4)
904 | data->zone[1].hyst);
906 lm85_write_value(client, LM85_REG_AFAN_HYST2,
907 (data->zone[2].hyst << 4));
909 mutex_unlock(&data->update_lock);
913 static ssize_t show_temp_auto_temp_max(struct device *dev,
914 struct device_attribute *attr, char *buf)
916 int nr = to_sensor_dev_attr(attr)->index;
917 struct lm85_data *data = lm85_update_device(dev);
918 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
919 RANGE_FROM_REG(data->zone[nr].range));
922 static ssize_t set_temp_auto_temp_max(struct device *dev,
923 struct device_attribute *attr, const char *buf, size_t count)
925 int nr = to_sensor_dev_attr(attr)->index;
926 struct i2c_client *client = to_i2c_client(dev);
927 struct lm85_data *data = i2c_get_clientdata(client);
929 long val = simple_strtol(buf, NULL, 10);
931 mutex_lock(&data->update_lock);
932 min = TEMP_FROM_REG(data->zone[nr].limit);
933 data->zone[nr].max_desired = TEMP_TO_REG(val);
934 data->zone[nr].range = RANGE_TO_REG(
936 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
937 ((data->zone[nr].range & 0x0f) << 4)
938 | (data->pwm_freq[nr] & 0x07));
939 mutex_unlock(&data->update_lock);
943 static ssize_t show_temp_auto_temp_crit(struct device *dev,
944 struct device_attribute *attr, char *buf)
946 int nr = to_sensor_dev_attr(attr)->index;
947 struct lm85_data *data = lm85_update_device(dev);
948 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
951 static ssize_t set_temp_auto_temp_crit(struct device *dev,
952 struct device_attribute *attr, const char *buf, size_t count)
954 int nr = to_sensor_dev_attr(attr)->index;
955 struct i2c_client *client = to_i2c_client(dev);
956 struct lm85_data *data = i2c_get_clientdata(client);
957 long val = simple_strtol(buf, NULL, 10);
959 mutex_lock(&data->update_lock);
960 data->zone[nr].critical = TEMP_TO_REG(val);
961 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
962 data->zone[nr].critical);
963 mutex_unlock(&data->update_lock);
967 #define temp_auto(offset) \
968 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \
969 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \
970 set_temp_auto_temp_off, offset - 1); \
971 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \
972 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \
973 set_temp_auto_temp_min, offset - 1); \
974 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \
975 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \
976 set_temp_auto_temp_max, offset - 1); \
977 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \
978 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \
979 set_temp_auto_temp_crit, offset - 1);
985 static struct attribute *lm85_attributes[] = {
986 &sensor_dev_attr_fan1_input.dev_attr.attr,
987 &sensor_dev_attr_fan2_input.dev_attr.attr,
988 &sensor_dev_attr_fan3_input.dev_attr.attr,
989 &sensor_dev_attr_fan4_input.dev_attr.attr,
990 &sensor_dev_attr_fan1_min.dev_attr.attr,
991 &sensor_dev_attr_fan2_min.dev_attr.attr,
992 &sensor_dev_attr_fan3_min.dev_attr.attr,
993 &sensor_dev_attr_fan4_min.dev_attr.attr,
994 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
995 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
996 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
997 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
999 &sensor_dev_attr_pwm1.dev_attr.attr,
1000 &sensor_dev_attr_pwm2.dev_attr.attr,
1001 &sensor_dev_attr_pwm3.dev_attr.attr,
1002 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1003 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1004 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1005 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1006 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1007 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1009 &sensor_dev_attr_in0_input.dev_attr.attr,
1010 &sensor_dev_attr_in1_input.dev_attr.attr,
1011 &sensor_dev_attr_in2_input.dev_attr.attr,
1012 &sensor_dev_attr_in3_input.dev_attr.attr,
1013 &sensor_dev_attr_in0_min.dev_attr.attr,
1014 &sensor_dev_attr_in1_min.dev_attr.attr,
1015 &sensor_dev_attr_in2_min.dev_attr.attr,
1016 &sensor_dev_attr_in3_min.dev_attr.attr,
1017 &sensor_dev_attr_in0_max.dev_attr.attr,
1018 &sensor_dev_attr_in1_max.dev_attr.attr,
1019 &sensor_dev_attr_in2_max.dev_attr.attr,
1020 &sensor_dev_attr_in3_max.dev_attr.attr,
1021 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1022 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1023 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1024 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1026 &sensor_dev_attr_temp1_input.dev_attr.attr,
1027 &sensor_dev_attr_temp2_input.dev_attr.attr,
1028 &sensor_dev_attr_temp3_input.dev_attr.attr,
1029 &sensor_dev_attr_temp1_min.dev_attr.attr,
1030 &sensor_dev_attr_temp2_min.dev_attr.attr,
1031 &sensor_dev_attr_temp3_min.dev_attr.attr,
1032 &sensor_dev_attr_temp1_max.dev_attr.attr,
1033 &sensor_dev_attr_temp2_max.dev_attr.attr,
1034 &sensor_dev_attr_temp3_max.dev_attr.attr,
1035 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1036 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1037 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1038 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1039 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1041 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1042 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1043 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1044 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1045 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1046 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1047 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1048 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1049 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1051 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1052 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1053 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1054 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1055 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1056 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1057 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1058 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1059 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1060 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1061 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1062 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1065 &dev_attr_cpu0_vid.attr,
1066 &dev_attr_alarms.attr,
1070 static const struct attribute_group lm85_group = {
1071 .attrs = lm85_attributes,
1074 static struct attribute *lm85_attributes_in4[] = {
1075 &sensor_dev_attr_in4_input.dev_attr.attr,
1076 &sensor_dev_attr_in4_min.dev_attr.attr,
1077 &sensor_dev_attr_in4_max.dev_attr.attr,
1078 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1082 static const struct attribute_group lm85_group_in4 = {
1083 .attrs = lm85_attributes_in4,
1086 static struct attribute *lm85_attributes_in567[] = {
1087 &sensor_dev_attr_in5_input.dev_attr.attr,
1088 &sensor_dev_attr_in6_input.dev_attr.attr,
1089 &sensor_dev_attr_in7_input.dev_attr.attr,
1090 &sensor_dev_attr_in5_min.dev_attr.attr,
1091 &sensor_dev_attr_in6_min.dev_attr.attr,
1092 &sensor_dev_attr_in7_min.dev_attr.attr,
1093 &sensor_dev_attr_in5_max.dev_attr.attr,
1094 &sensor_dev_attr_in6_max.dev_attr.attr,
1095 &sensor_dev_attr_in7_max.dev_attr.attr,
1096 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1097 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1098 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1102 static const struct attribute_group lm85_group_in567 = {
1103 .attrs = lm85_attributes_in567,
1106 static void lm85_init_client(struct i2c_client *client)
1110 /* Start monitoring if needed */
1111 value = lm85_read_value(client, LM85_REG_CONFIG);
1112 if (!(value & 0x01)) {
1113 dev_info(&client->dev, "Starting monitoring\n");
1114 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1117 /* Warn about unusual configuration bits */
1119 dev_warn(&client->dev, "Device configuration is locked\n");
1120 if (!(value & 0x04))
1121 dev_warn(&client->dev, "Device is not ready\n");
1124 /* Return 0 if detection is successful, -ENODEV otherwise */
1125 static int lm85_detect(struct i2c_client *client, int kind,
1126 struct i2c_board_info *info)
1128 struct i2c_adapter *adapter = client->adapter;
1129 int address = client->addr;
1130 const char *type_name;
1132 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1133 /* We need to be able to do byte I/O */
1137 /* If auto-detecting, determine the chip type */
1139 int company = lm85_read_value(client, LM85_REG_COMPANY);
1140 int verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1142 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1143 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1144 address, company, verstep);
1146 /* All supported chips have the version in common */
1147 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC) {
1148 dev_dbg(&adapter->dev, "Autodetection failed: "
1149 "unsupported version\n");
1154 /* Now, refine the detection */
1155 if (company == LM85_COMPANY_NATIONAL) {
1157 case LM85_VERSTEP_LM85C:
1160 case LM85_VERSTEP_LM85B:
1164 } else if (company == LM85_COMPANY_ANALOG_DEV) {
1166 case LM85_VERSTEP_ADM1027:
1169 case LM85_VERSTEP_ADT7463:
1170 case LM85_VERSTEP_ADT7463C:
1174 } else if (company == LM85_COMPANY_SMSC) {
1176 case LM85_VERSTEP_EMC6D100_A0:
1177 case LM85_VERSTEP_EMC6D100_A1:
1178 /* Note: we can't tell a '100 from a '101 */
1181 case LM85_VERSTEP_EMC6D102:
1186 dev_dbg(&adapter->dev, "Autodetection failed: "
1187 "unknown vendor\n");
1194 type_name = "lm85b";
1197 type_name = "lm85c";
1200 type_name = "adm1027";
1203 type_name = "adt7463";
1206 type_name = "emc6d100";
1209 type_name = "emc6d102";
1214 strlcpy(info->type, type_name, I2C_NAME_SIZE);
1219 static int lm85_probe(struct i2c_client *client,
1220 const struct i2c_device_id *id)
1222 struct lm85_data *data;
1225 data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL);
1229 i2c_set_clientdata(client, data);
1230 data->type = id->driver_data;
1231 mutex_init(&data->update_lock);
1233 /* Fill in the chip specific driver values */
1234 switch (data->type) {
1239 data->freq_map = adm1027_freq_map;
1242 data->freq_map = lm85_freq_map;
1245 /* Set the VRM version */
1246 data->vrm = vid_which_vrm();
1248 /* Initialize the LM85 chip */
1249 lm85_init_client(client);
1251 /* Register sysfs hooks */
1252 err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1256 /* The ADT7463 has an optional VRM 10 mode where pin 21 is used
1257 as a sixth digital VID input rather than an analog input. */
1258 data->vid = lm85_read_value(client, LM85_REG_VID);
1259 if (!(data->type == adt7463 && (data->vid & 0x80)))
1260 if ((err = sysfs_create_group(&client->dev.kobj,
1264 /* The EMC6D100 has 3 additional voltage inputs */
1265 if (data->type == emc6d100)
1266 if ((err = sysfs_create_group(&client->dev.kobj,
1267 &lm85_group_in567)))
1270 data->hwmon_dev = hwmon_device_register(&client->dev);
1271 if (IS_ERR(data->hwmon_dev)) {
1272 err = PTR_ERR(data->hwmon_dev);
1278 /* Error out and cleanup code */
1280 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1281 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1282 if (data->type == emc6d100)
1283 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1289 static int lm85_remove(struct i2c_client *client)
1291 struct lm85_data *data = i2c_get_clientdata(client);
1292 hwmon_device_unregister(data->hwmon_dev);
1293 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1294 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1295 if (data->type == emc6d100)
1296 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1302 static int lm85_read_value(struct i2c_client *client, u8 reg)
1306 /* What size location is it? */
1308 case LM85_REG_FAN(0): /* Read WORD data */
1309 case LM85_REG_FAN(1):
1310 case LM85_REG_FAN(2):
1311 case LM85_REG_FAN(3):
1312 case LM85_REG_FAN_MIN(0):
1313 case LM85_REG_FAN_MIN(1):
1314 case LM85_REG_FAN_MIN(2):
1315 case LM85_REG_FAN_MIN(3):
1316 case LM85_REG_ALARM1: /* Read both bytes at once */
1317 res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1318 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1320 default: /* Read BYTE data */
1321 res = i2c_smbus_read_byte_data(client, reg);
1328 static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1331 case LM85_REG_FAN(0): /* Write WORD data */
1332 case LM85_REG_FAN(1):
1333 case LM85_REG_FAN(2):
1334 case LM85_REG_FAN(3):
1335 case LM85_REG_FAN_MIN(0):
1336 case LM85_REG_FAN_MIN(1):
1337 case LM85_REG_FAN_MIN(2):
1338 case LM85_REG_FAN_MIN(3):
1339 /* NOTE: ALARM is read only, so not included here */
1340 i2c_smbus_write_byte_data(client, reg, value & 0xff);
1341 i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1343 default: /* Write BYTE data */
1344 i2c_smbus_write_byte_data(client, reg, value);
1349 static struct lm85_data *lm85_update_device(struct device *dev)
1351 struct i2c_client *client = to_i2c_client(dev);
1352 struct lm85_data *data = i2c_get_clientdata(client);
1355 mutex_lock(&data->update_lock);
1358 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1359 /* Things that change quickly */
1360 dev_dbg(&client->dev, "Reading sensor values\n");
1362 /* Have to read extended bits first to "freeze" the
1363 * more significant bits that are read later.
1364 * There are 2 additional resolution bits per channel and we
1365 * have room for 4, so we shift them to the left.
1367 if (data->type == adm1027 || data->type == adt7463) {
1368 int ext1 = lm85_read_value(client,
1369 ADM1027_REG_EXTEND_ADC1);
1370 int ext2 = lm85_read_value(client,
1371 ADM1027_REG_EXTEND_ADC2);
1372 int val = (ext1 << 8) + ext2;
1374 for (i = 0; i <= 4; i++)
1376 ((val >> (i * 2)) & 0x03) << 2;
1378 for (i = 0; i <= 2; i++)
1380 (val >> ((i + 4) * 2)) & 0x0c;
1383 data->vid = lm85_read_value(client, LM85_REG_VID);
1385 for (i = 0; i <= 3; ++i) {
1387 lm85_read_value(client, LM85_REG_IN(i));
1389 lm85_read_value(client, LM85_REG_FAN(i));
1392 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1393 data->in[4] = lm85_read_value(client,
1397 for (i = 0; i <= 2; ++i) {
1399 lm85_read_value(client, LM85_REG_TEMP(i));
1401 lm85_read_value(client, LM85_REG_PWM(i));
1404 data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1406 if (data->type == emc6d100) {
1407 /* Three more voltage sensors */
1408 for (i = 5; i <= 7; ++i) {
1409 data->in[i] = lm85_read_value(client,
1410 EMC6D100_REG_IN(i));
1412 /* More alarm bits */
1413 data->alarms |= lm85_read_value(client,
1414 EMC6D100_REG_ALARM3) << 16;
1415 } else if (data->type == emc6d102) {
1416 /* Have to read LSB bits after the MSB ones because
1417 the reading of the MSB bits has frozen the
1418 LSBs (backward from the ADM1027).
1420 int ext1 = lm85_read_value(client,
1421 EMC6D102_REG_EXTEND_ADC1);
1422 int ext2 = lm85_read_value(client,
1423 EMC6D102_REG_EXTEND_ADC2);
1424 int ext3 = lm85_read_value(client,
1425 EMC6D102_REG_EXTEND_ADC3);
1426 int ext4 = lm85_read_value(client,
1427 EMC6D102_REG_EXTEND_ADC4);
1428 data->in_ext[0] = ext3 & 0x0f;
1429 data->in_ext[1] = ext4 & 0x0f;
1430 data->in_ext[2] = ext4 >> 4;
1431 data->in_ext[3] = ext3 >> 4;
1432 data->in_ext[4] = ext2 >> 4;
1434 data->temp_ext[0] = ext1 & 0x0f;
1435 data->temp_ext[1] = ext2 & 0x0f;
1436 data->temp_ext[2] = ext1 >> 4;
1439 data->last_reading = jiffies;
1440 } /* last_reading */
1443 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1444 /* Things that don't change often */
1445 dev_dbg(&client->dev, "Reading config values\n");
1447 for (i = 0; i <= 3; ++i) {
1449 lm85_read_value(client, LM85_REG_IN_MIN(i));
1451 lm85_read_value(client, LM85_REG_IN_MAX(i));
1453 lm85_read_value(client, LM85_REG_FAN_MIN(i));
1456 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1457 data->in_min[4] = lm85_read_value(client,
1458 LM85_REG_IN_MIN(4));
1459 data->in_max[4] = lm85_read_value(client,
1460 LM85_REG_IN_MAX(4));
1463 if (data->type == emc6d100) {
1464 for (i = 5; i <= 7; ++i) {
1465 data->in_min[i] = lm85_read_value(client,
1466 EMC6D100_REG_IN_MIN(i));
1467 data->in_max[i] = lm85_read_value(client,
1468 EMC6D100_REG_IN_MAX(i));
1472 for (i = 0; i <= 2; ++i) {
1476 lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1478 lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1480 data->autofan[i].config =
1481 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1482 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1483 data->pwm_freq[i] = val & 0x07;
1484 data->zone[i].range = val >> 4;
1485 data->autofan[i].min_pwm =
1486 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1487 data->zone[i].limit =
1488 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1489 data->zone[i].critical =
1490 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1493 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1494 data->autofan[0].min_off = (i & 0x20) != 0;
1495 data->autofan[1].min_off = (i & 0x40) != 0;
1496 data->autofan[2].min_off = (i & 0x80) != 0;
1498 i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1499 data->zone[0].hyst = i >> 4;
1500 data->zone[1].hyst = i & 0x0f;
1502 i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1503 data->zone[2].hyst = i >> 4;
1505 data->last_config = jiffies;
1510 mutex_unlock(&data->update_lock);
1516 static int __init sm_lm85_init(void)
1518 return i2c_add_driver(&lm85_driver);
1521 static void __exit sm_lm85_exit(void)
1523 i2c_del_driver(&lm85_driver);
1526 MODULE_LICENSE("GPL");
1527 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1528 "Margit Schubert-While <margitsw@t-online.de>, "
1529 "Justin Thiessen <jthiessen@penguincomputing.com>");
1530 MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1532 module_init(sm_lm85_init);
1533 module_exit(sm_lm85_exit);