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 i2c_client client;
293 struct device *hwmon_dev;
297 struct mutex update_lock;
298 int valid; /* !=0 if following fields are valid */
299 unsigned long last_reading; /* In jiffies */
300 unsigned long last_config; /* In jiffies */
302 u8 in[8]; /* Register value */
303 u8 in_max[8]; /* Register value */
304 u8 in_min[8]; /* Register value */
305 s8 temp[3]; /* Register value */
306 s8 temp_min[3]; /* Register value */
307 s8 temp_max[3]; /* Register value */
308 u16 fan[4]; /* Register value */
309 u16 fan_min[4]; /* Register value */
310 u8 pwm[3]; /* Register value */
311 u8 pwm_freq[3]; /* Register encoding */
312 u8 temp_ext[3]; /* Decoded values */
313 u8 in_ext[8]; /* Decoded values */
314 u8 vid; /* Register value */
315 u8 vrm; /* VRM version */
316 u32 alarms; /* Register encoding, combined */
317 struct lm85_autofan autofan[3];
318 struct lm85_zone zone[3];
321 static int lm85_attach_adapter(struct i2c_adapter *adapter);
322 static int lm85_detect(struct i2c_adapter *adapter, int address,
324 static int lm85_detach_client(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 struct i2c_driver lm85_driver = {
335 .attach_adapter = lm85_attach_adapter,
336 .detach_client = lm85_detach_client,
341 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
344 int nr = to_sensor_dev_attr(attr)->index;
345 struct lm85_data *data = lm85_update_device(dev);
346 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
349 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
352 int nr = to_sensor_dev_attr(attr)->index;
353 struct lm85_data *data = lm85_update_device(dev);
354 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr]));
357 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
358 const char *buf, size_t count)
360 int nr = to_sensor_dev_attr(attr)->index;
361 struct i2c_client *client = to_i2c_client(dev);
362 struct lm85_data *data = i2c_get_clientdata(client);
363 unsigned long val = simple_strtoul(buf, NULL, 10);
365 mutex_lock(&data->update_lock);
366 data->fan_min[nr] = FAN_TO_REG(val);
367 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
368 mutex_unlock(&data->update_lock);
372 #define show_fan_offset(offset) \
373 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
374 show_fan, NULL, offset - 1); \
375 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
376 show_fan_min, set_fan_min, offset - 1)
383 /* vid, vrm, alarms */
385 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
388 struct lm85_data *data = lm85_update_device(dev);
391 if (data->type == adt7463 && (data->vid & 0x80)) {
392 /* 6-pin VID (VRM 10) */
393 vid = vid_from_reg(data->vid & 0x3f, data->vrm);
395 /* 5-pin VID (VRM 9) */
396 vid = vid_from_reg(data->vid & 0x1f, data->vrm);
399 return sprintf(buf, "%d\n", vid);
402 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
404 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
407 struct lm85_data *data = dev_get_drvdata(dev);
408 return sprintf(buf, "%ld\n", (long) data->vrm);
411 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
412 const char *buf, size_t count)
414 struct lm85_data *data = dev_get_drvdata(dev);
415 data->vrm = simple_strtoul(buf, NULL, 10);
419 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
421 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
424 struct lm85_data *data = lm85_update_device(dev);
425 return sprintf(buf, "%u\n", data->alarms);
428 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
430 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
433 int nr = to_sensor_dev_attr(attr)->index;
434 struct lm85_data *data = lm85_update_device(dev);
435 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
438 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
439 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
440 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
441 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
442 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
443 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
444 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
445 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
446 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
447 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
448 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
449 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
450 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
451 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
452 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
453 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
454 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
458 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
461 int nr = to_sensor_dev_attr(attr)->index;
462 struct lm85_data *data = lm85_update_device(dev);
463 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
466 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
467 const char *buf, size_t count)
469 int nr = to_sensor_dev_attr(attr)->index;
470 struct i2c_client *client = to_i2c_client(dev);
471 struct lm85_data *data = i2c_get_clientdata(client);
472 long val = simple_strtol(buf, NULL, 10);
474 mutex_lock(&data->update_lock);
475 data->pwm[nr] = PWM_TO_REG(val);
476 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
477 mutex_unlock(&data->update_lock);
481 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
484 int nr = to_sensor_dev_attr(attr)->index;
485 struct lm85_data *data = lm85_update_device(dev);
486 int pwm_zone, enable;
488 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
490 case -1: /* PWM is always at 100% */
493 case 0: /* PWM is always at 0% */
494 case -2: /* PWM responds to manual control */
497 default: /* PWM in automatic mode */
500 return sprintf(buf, "%d\n", enable);
503 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
504 *attr, const char *buf, size_t count)
506 int nr = to_sensor_dev_attr(attr)->index;
507 struct i2c_client *client = to_i2c_client(dev);
508 struct lm85_data *data = i2c_get_clientdata(client);
509 long val = simple_strtol(buf, NULL, 10);
520 /* Here we have to choose arbitrarily one of the 5 possible
521 configurations; I go for the safest */
528 mutex_lock(&data->update_lock);
529 data->autofan[nr].config = lm85_read_value(client,
530 LM85_REG_AFAN_CONFIG(nr));
531 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
533 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
534 data->autofan[nr].config);
535 mutex_unlock(&data->update_lock);
539 static ssize_t show_pwm_freq(struct device *dev,
540 struct device_attribute *attr, char *buf)
542 int nr = to_sensor_dev_attr(attr)->index;
543 struct lm85_data *data = lm85_update_device(dev);
544 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map,
545 data->pwm_freq[nr]));
548 static ssize_t set_pwm_freq(struct device *dev,
549 struct device_attribute *attr, const char *buf, size_t count)
551 int nr = to_sensor_dev_attr(attr)->index;
552 struct i2c_client *client = to_i2c_client(dev);
553 struct lm85_data *data = i2c_get_clientdata(client);
554 long val = simple_strtol(buf, NULL, 10);
556 mutex_lock(&data->update_lock);
557 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
558 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
559 (data->zone[nr].range << 4)
560 | data->pwm_freq[nr]);
561 mutex_unlock(&data->update_lock);
565 #define show_pwm_reg(offset) \
566 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
567 show_pwm, set_pwm, offset - 1); \
568 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
569 show_pwm_enable, set_pwm_enable, offset - 1); \
570 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
571 show_pwm_freq, set_pwm_freq, offset - 1)
579 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
582 int nr = to_sensor_dev_attr(attr)->index;
583 struct lm85_data *data = lm85_update_device(dev);
584 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
588 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
591 int nr = to_sensor_dev_attr(attr)->index;
592 struct lm85_data *data = lm85_update_device(dev);
593 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
596 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
597 const char *buf, size_t count)
599 int nr = to_sensor_dev_attr(attr)->index;
600 struct i2c_client *client = to_i2c_client(dev);
601 struct lm85_data *data = i2c_get_clientdata(client);
602 long val = simple_strtol(buf, NULL, 10);
604 mutex_lock(&data->update_lock);
605 data->in_min[nr] = INS_TO_REG(nr, val);
606 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
607 mutex_unlock(&data->update_lock);
611 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
614 int nr = to_sensor_dev_attr(attr)->index;
615 struct lm85_data *data = lm85_update_device(dev);
616 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
619 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
620 const char *buf, size_t count)
622 int nr = to_sensor_dev_attr(attr)->index;
623 struct i2c_client *client = to_i2c_client(dev);
624 struct lm85_data *data = i2c_get_clientdata(client);
625 long val = simple_strtol(buf, NULL, 10);
627 mutex_lock(&data->update_lock);
628 data->in_max[nr] = INS_TO_REG(nr, val);
629 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
630 mutex_unlock(&data->update_lock);
634 #define show_in_reg(offset) \
635 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
636 show_in, NULL, offset); \
637 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
638 show_in_min, set_in_min, offset); \
639 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
640 show_in_max, set_in_max, offset)
653 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
656 int nr = to_sensor_dev_attr(attr)->index;
657 struct lm85_data *data = lm85_update_device(dev);
658 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
659 data->temp_ext[nr]));
662 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
665 int nr = to_sensor_dev_attr(attr)->index;
666 struct lm85_data *data = lm85_update_device(dev);
667 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
670 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
671 const char *buf, size_t count)
673 int nr = to_sensor_dev_attr(attr)->index;
674 struct i2c_client *client = to_i2c_client(dev);
675 struct lm85_data *data = i2c_get_clientdata(client);
676 long val = simple_strtol(buf, NULL, 10);
678 mutex_lock(&data->update_lock);
679 data->temp_min[nr] = TEMP_TO_REG(val);
680 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
681 mutex_unlock(&data->update_lock);
685 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
688 int nr = to_sensor_dev_attr(attr)->index;
689 struct lm85_data *data = lm85_update_device(dev);
690 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
693 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
694 const char *buf, size_t count)
696 int nr = to_sensor_dev_attr(attr)->index;
697 struct i2c_client *client = to_i2c_client(dev);
698 struct lm85_data *data = i2c_get_clientdata(client);
699 long val = simple_strtol(buf, NULL, 10);
701 mutex_lock(&data->update_lock);
702 data->temp_max[nr] = TEMP_TO_REG(val);
703 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
704 mutex_unlock(&data->update_lock);
708 #define show_temp_reg(offset) \
709 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
710 show_temp, NULL, offset - 1); \
711 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
712 show_temp_min, set_temp_min, offset - 1); \
713 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
714 show_temp_max, set_temp_max, offset - 1);
721 /* Automatic PWM control */
723 static ssize_t show_pwm_auto_channels(struct device *dev,
724 struct device_attribute *attr, char *buf)
726 int nr = to_sensor_dev_attr(attr)->index;
727 struct lm85_data *data = lm85_update_device(dev);
728 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
731 static ssize_t set_pwm_auto_channels(struct device *dev,
732 struct device_attribute *attr, const char *buf, size_t count)
734 int nr = to_sensor_dev_attr(attr)->index;
735 struct i2c_client *client = to_i2c_client(dev);
736 struct lm85_data *data = i2c_get_clientdata(client);
737 long val = simple_strtol(buf, NULL, 10);
739 mutex_lock(&data->update_lock);
740 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
742 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
743 data->autofan[nr].config);
744 mutex_unlock(&data->update_lock);
748 static ssize_t show_pwm_auto_pwm_min(struct device *dev,
749 struct device_attribute *attr, char *buf)
751 int nr = to_sensor_dev_attr(attr)->index;
752 struct lm85_data *data = lm85_update_device(dev);
753 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
756 static ssize_t set_pwm_auto_pwm_min(struct device *dev,
757 struct device_attribute *attr, const char *buf, size_t count)
759 int nr = to_sensor_dev_attr(attr)->index;
760 struct i2c_client *client = to_i2c_client(dev);
761 struct lm85_data *data = i2c_get_clientdata(client);
762 long val = simple_strtol(buf, NULL, 10);
764 mutex_lock(&data->update_lock);
765 data->autofan[nr].min_pwm = PWM_TO_REG(val);
766 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
767 data->autofan[nr].min_pwm);
768 mutex_unlock(&data->update_lock);
772 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
773 struct device_attribute *attr, char *buf)
775 int nr = to_sensor_dev_attr(attr)->index;
776 struct lm85_data *data = lm85_update_device(dev);
777 return sprintf(buf, "%d\n", data->autofan[nr].min_off);
780 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
781 struct device_attribute *attr, const char *buf, size_t count)
783 int nr = to_sensor_dev_attr(attr)->index;
784 struct i2c_client *client = to_i2c_client(dev);
785 struct lm85_data *data = i2c_get_clientdata(client);
786 long val = simple_strtol(buf, NULL, 10);
789 mutex_lock(&data->update_lock);
790 data->autofan[nr].min_off = val;
791 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
792 tmp &= ~(0x20 << nr);
793 if (data->autofan[nr].min_off)
795 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
796 mutex_unlock(&data->update_lock);
800 #define pwm_auto(offset) \
801 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
802 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
803 set_pwm_auto_channels, offset - 1); \
804 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
805 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \
806 set_pwm_auto_pwm_min, offset - 1); \
807 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
808 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
809 set_pwm_auto_pwm_minctl, offset - 1)
815 /* Temperature settings for automatic PWM control */
817 static ssize_t show_temp_auto_temp_off(struct device *dev,
818 struct device_attribute *attr, char *buf)
820 int nr = to_sensor_dev_attr(attr)->index;
821 struct lm85_data *data = lm85_update_device(dev);
822 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
823 HYST_FROM_REG(data->zone[nr].hyst));
826 static ssize_t set_temp_auto_temp_off(struct device *dev,
827 struct device_attribute *attr, const char *buf, size_t count)
829 int nr = to_sensor_dev_attr(attr)->index;
830 struct i2c_client *client = to_i2c_client(dev);
831 struct lm85_data *data = i2c_get_clientdata(client);
833 long val = simple_strtol(buf, NULL, 10);
835 mutex_lock(&data->update_lock);
836 min = TEMP_FROM_REG(data->zone[nr].limit);
837 data->zone[nr].off_desired = TEMP_TO_REG(val);
838 data->zone[nr].hyst = HYST_TO_REG(min - val);
839 if (nr == 0 || nr == 1) {
840 lm85_write_value(client, LM85_REG_AFAN_HYST1,
841 (data->zone[0].hyst << 4)
842 | data->zone[1].hyst);
844 lm85_write_value(client, LM85_REG_AFAN_HYST2,
845 (data->zone[2].hyst << 4));
847 mutex_unlock(&data->update_lock);
851 static ssize_t show_temp_auto_temp_min(struct device *dev,
852 struct device_attribute *attr, char *buf)
854 int nr = to_sensor_dev_attr(attr)->index;
855 struct lm85_data *data = lm85_update_device(dev);
856 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
859 static ssize_t set_temp_auto_temp_min(struct device *dev,
860 struct device_attribute *attr, const char *buf, size_t count)
862 int nr = to_sensor_dev_attr(attr)->index;
863 struct i2c_client *client = to_i2c_client(dev);
864 struct lm85_data *data = i2c_get_clientdata(client);
865 long val = simple_strtol(buf, NULL, 10);
867 mutex_lock(&data->update_lock);
868 data->zone[nr].limit = TEMP_TO_REG(val);
869 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
870 data->zone[nr].limit);
872 /* Update temp_auto_max and temp_auto_range */
873 data->zone[nr].range = RANGE_TO_REG(
874 TEMP_FROM_REG(data->zone[nr].max_desired) -
875 TEMP_FROM_REG(data->zone[nr].limit));
876 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
877 ((data->zone[nr].range & 0x0f) << 4)
878 | (data->pwm_freq[nr] & 0x07));
880 /* Update temp_auto_hyst and temp_auto_off */
881 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
882 data->zone[nr].limit) - TEMP_FROM_REG(
883 data->zone[nr].off_desired));
884 if (nr == 0 || nr == 1) {
885 lm85_write_value(client, LM85_REG_AFAN_HYST1,
886 (data->zone[0].hyst << 4)
887 | data->zone[1].hyst);
889 lm85_write_value(client, LM85_REG_AFAN_HYST2,
890 (data->zone[2].hyst << 4));
892 mutex_unlock(&data->update_lock);
896 static ssize_t show_temp_auto_temp_max(struct device *dev,
897 struct device_attribute *attr, char *buf)
899 int nr = to_sensor_dev_attr(attr)->index;
900 struct lm85_data *data = lm85_update_device(dev);
901 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
902 RANGE_FROM_REG(data->zone[nr].range));
905 static ssize_t set_temp_auto_temp_max(struct device *dev,
906 struct device_attribute *attr, const char *buf, size_t count)
908 int nr = to_sensor_dev_attr(attr)->index;
909 struct i2c_client *client = to_i2c_client(dev);
910 struct lm85_data *data = i2c_get_clientdata(client);
912 long val = simple_strtol(buf, NULL, 10);
914 mutex_lock(&data->update_lock);
915 min = TEMP_FROM_REG(data->zone[nr].limit);
916 data->zone[nr].max_desired = TEMP_TO_REG(val);
917 data->zone[nr].range = RANGE_TO_REG(
919 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
920 ((data->zone[nr].range & 0x0f) << 4)
921 | (data->pwm_freq[nr] & 0x07));
922 mutex_unlock(&data->update_lock);
926 static ssize_t show_temp_auto_temp_crit(struct device *dev,
927 struct device_attribute *attr, char *buf)
929 int nr = to_sensor_dev_attr(attr)->index;
930 struct lm85_data *data = lm85_update_device(dev);
931 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
934 static ssize_t set_temp_auto_temp_crit(struct device *dev,
935 struct device_attribute *attr, const char *buf, size_t count)
937 int nr = to_sensor_dev_attr(attr)->index;
938 struct i2c_client *client = to_i2c_client(dev);
939 struct lm85_data *data = i2c_get_clientdata(client);
940 long val = simple_strtol(buf, NULL, 10);
942 mutex_lock(&data->update_lock);
943 data->zone[nr].critical = TEMP_TO_REG(val);
944 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
945 data->zone[nr].critical);
946 mutex_unlock(&data->update_lock);
950 #define temp_auto(offset) \
951 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \
952 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \
953 set_temp_auto_temp_off, offset - 1); \
954 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \
955 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \
956 set_temp_auto_temp_min, offset - 1); \
957 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \
958 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \
959 set_temp_auto_temp_max, offset - 1); \
960 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \
961 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \
962 set_temp_auto_temp_crit, offset - 1);
968 static int lm85_attach_adapter(struct i2c_adapter *adapter)
970 if (!(adapter->class & I2C_CLASS_HWMON))
972 return i2c_probe(adapter, &addr_data, lm85_detect);
975 static struct attribute *lm85_attributes[] = {
976 &sensor_dev_attr_fan1_input.dev_attr.attr,
977 &sensor_dev_attr_fan2_input.dev_attr.attr,
978 &sensor_dev_attr_fan3_input.dev_attr.attr,
979 &sensor_dev_attr_fan4_input.dev_attr.attr,
980 &sensor_dev_attr_fan1_min.dev_attr.attr,
981 &sensor_dev_attr_fan2_min.dev_attr.attr,
982 &sensor_dev_attr_fan3_min.dev_attr.attr,
983 &sensor_dev_attr_fan4_min.dev_attr.attr,
984 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
985 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
986 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
987 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
989 &sensor_dev_attr_pwm1.dev_attr.attr,
990 &sensor_dev_attr_pwm2.dev_attr.attr,
991 &sensor_dev_attr_pwm3.dev_attr.attr,
992 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
993 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
994 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
995 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
996 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
997 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
999 &sensor_dev_attr_in0_input.dev_attr.attr,
1000 &sensor_dev_attr_in1_input.dev_attr.attr,
1001 &sensor_dev_attr_in2_input.dev_attr.attr,
1002 &sensor_dev_attr_in3_input.dev_attr.attr,
1003 &sensor_dev_attr_in0_min.dev_attr.attr,
1004 &sensor_dev_attr_in1_min.dev_attr.attr,
1005 &sensor_dev_attr_in2_min.dev_attr.attr,
1006 &sensor_dev_attr_in3_min.dev_attr.attr,
1007 &sensor_dev_attr_in0_max.dev_attr.attr,
1008 &sensor_dev_attr_in1_max.dev_attr.attr,
1009 &sensor_dev_attr_in2_max.dev_attr.attr,
1010 &sensor_dev_attr_in3_max.dev_attr.attr,
1011 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1012 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1013 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1014 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1016 &sensor_dev_attr_temp1_input.dev_attr.attr,
1017 &sensor_dev_attr_temp2_input.dev_attr.attr,
1018 &sensor_dev_attr_temp3_input.dev_attr.attr,
1019 &sensor_dev_attr_temp1_min.dev_attr.attr,
1020 &sensor_dev_attr_temp2_min.dev_attr.attr,
1021 &sensor_dev_attr_temp3_min.dev_attr.attr,
1022 &sensor_dev_attr_temp1_max.dev_attr.attr,
1023 &sensor_dev_attr_temp2_max.dev_attr.attr,
1024 &sensor_dev_attr_temp3_max.dev_attr.attr,
1025 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1026 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1027 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1028 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1029 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1031 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1032 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1033 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1034 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1035 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1036 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1037 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1038 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1039 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1041 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1042 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1043 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1044 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1045 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1046 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1047 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1048 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1049 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1050 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1051 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1052 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1055 &dev_attr_cpu0_vid.attr,
1056 &dev_attr_alarms.attr,
1060 static const struct attribute_group lm85_group = {
1061 .attrs = lm85_attributes,
1064 static struct attribute *lm85_attributes_in4[] = {
1065 &sensor_dev_attr_in4_input.dev_attr.attr,
1066 &sensor_dev_attr_in4_min.dev_attr.attr,
1067 &sensor_dev_attr_in4_max.dev_attr.attr,
1068 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1072 static const struct attribute_group lm85_group_in4 = {
1073 .attrs = lm85_attributes_in4,
1076 static struct attribute *lm85_attributes_in567[] = {
1077 &sensor_dev_attr_in5_input.dev_attr.attr,
1078 &sensor_dev_attr_in6_input.dev_attr.attr,
1079 &sensor_dev_attr_in7_input.dev_attr.attr,
1080 &sensor_dev_attr_in5_min.dev_attr.attr,
1081 &sensor_dev_attr_in6_min.dev_attr.attr,
1082 &sensor_dev_attr_in7_min.dev_attr.attr,
1083 &sensor_dev_attr_in5_max.dev_attr.attr,
1084 &sensor_dev_attr_in6_max.dev_attr.attr,
1085 &sensor_dev_attr_in7_max.dev_attr.attr,
1086 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1087 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1088 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1092 static const struct attribute_group lm85_group_in567 = {
1093 .attrs = lm85_attributes_in567,
1096 static void lm85_init_client(struct i2c_client *client)
1100 /* Start monitoring if needed */
1101 value = lm85_read_value(client, LM85_REG_CONFIG);
1102 if (!(value & 0x01)) {
1103 dev_info(&client->dev, "Starting monitoring\n");
1104 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1107 /* Warn about unusual configuration bits */
1109 dev_warn(&client->dev, "Device configuration is locked\n");
1110 if (!(value & 0x04))
1111 dev_warn(&client->dev, "Device is not ready\n");
1114 static int lm85_detect(struct i2c_adapter *adapter, int address,
1117 struct i2c_client *client;
1118 struct lm85_data *data;
1120 const char *type_name;
1122 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1123 /* We need to be able to do byte I/O */
1127 if (!(data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL))) {
1132 client = &data->client;
1133 i2c_set_clientdata(client, data);
1134 client->addr = address;
1135 client->adapter = adapter;
1136 client->driver = &lm85_driver;
1138 /* If auto-detecting, determine the chip type */
1140 int company = lm85_read_value(client, LM85_REG_COMPANY);
1141 int verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1143 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1144 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1145 address, company, verstep);
1147 /* All supported chips have the version in common */
1148 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC) {
1149 dev_dbg(&adapter->dev, "Autodetection failed: "
1150 "unsupported version\n");
1155 /* Now, refine the detection */
1156 if (company == LM85_COMPANY_NATIONAL) {
1158 case LM85_VERSTEP_LM85C:
1161 case LM85_VERSTEP_LM85B:
1165 } else if (company == LM85_COMPANY_ANALOG_DEV) {
1167 case LM85_VERSTEP_ADM1027:
1170 case LM85_VERSTEP_ADT7463:
1171 case LM85_VERSTEP_ADT7463C:
1175 } else if (company == LM85_COMPANY_SMSC) {
1177 case LM85_VERSTEP_EMC6D100_A0:
1178 case LM85_VERSTEP_EMC6D100_A1:
1179 /* Note: we can't tell a '100 from a '101 */
1182 case LM85_VERSTEP_EMC6D102:
1187 dev_dbg(&adapter->dev, "Autodetection failed: "
1188 "unknown vendor\n");
1193 /* Fill in the chip specific driver values */
1196 type_name = "lm85b";
1197 data->freq_map = lm85_freq_map;
1200 type_name = "lm85c";
1201 data->freq_map = lm85_freq_map;
1204 type_name = "adm1027";
1205 data->freq_map = adm1027_freq_map;
1208 type_name = "adt7463";
1209 data->freq_map = adm1027_freq_map;
1212 type_name = "emc6d100";
1213 data->freq_map = adm1027_freq_map;
1216 type_name = "emc6d102";
1217 data->freq_map = adm1027_freq_map;
1221 data->freq_map = lm85_freq_map;
1223 strlcpy(client->name, type_name, I2C_NAME_SIZE);
1225 /* Fill in the remaining client fields */
1227 mutex_init(&data->update_lock);
1229 /* Tell the I2C layer a new client has arrived */
1230 err = i2c_attach_client(client);
1234 /* Set the VRM version */
1235 data->vrm = vid_which_vrm();
1237 /* Initialize the LM85 chip */
1238 lm85_init_client(client);
1240 /* Register sysfs hooks */
1241 err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1245 /* The ADT7463 has an optional VRM 10 mode where pin 21 is used
1246 as a sixth digital VID input rather than an analog input. */
1247 data->vid = lm85_read_value(client, LM85_REG_VID);
1248 if (!(kind == adt7463 && (data->vid & 0x80)))
1249 if ((err = sysfs_create_group(&client->dev.kobj,
1253 /* The EMC6D100 has 3 additional voltage inputs */
1254 if (kind == emc6d100)
1255 if ((err = sysfs_create_group(&client->dev.kobj,
1256 &lm85_group_in567)))
1259 data->hwmon_dev = hwmon_device_register(&client->dev);
1260 if (IS_ERR(data->hwmon_dev)) {
1261 err = PTR_ERR(data->hwmon_dev);
1267 /* Error out and cleanup code */
1269 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1270 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1271 if (kind == emc6d100)
1272 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1274 i2c_detach_client(client);
1281 static int lm85_detach_client(struct i2c_client *client)
1283 struct lm85_data *data = i2c_get_clientdata(client);
1284 hwmon_device_unregister(data->hwmon_dev);
1285 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1286 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1287 if (data->type == emc6d100)
1288 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1289 i2c_detach_client(client);
1295 static int lm85_read_value(struct i2c_client *client, u8 reg)
1299 /* What size location is it? */
1301 case LM85_REG_FAN(0): /* Read WORD data */
1302 case LM85_REG_FAN(1):
1303 case LM85_REG_FAN(2):
1304 case LM85_REG_FAN(3):
1305 case LM85_REG_FAN_MIN(0):
1306 case LM85_REG_FAN_MIN(1):
1307 case LM85_REG_FAN_MIN(2):
1308 case LM85_REG_FAN_MIN(3):
1309 case LM85_REG_ALARM1: /* Read both bytes at once */
1310 res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1311 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1313 default: /* Read BYTE data */
1314 res = i2c_smbus_read_byte_data(client, reg);
1321 static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1324 case LM85_REG_FAN(0): /* Write WORD data */
1325 case LM85_REG_FAN(1):
1326 case LM85_REG_FAN(2):
1327 case LM85_REG_FAN(3):
1328 case LM85_REG_FAN_MIN(0):
1329 case LM85_REG_FAN_MIN(1):
1330 case LM85_REG_FAN_MIN(2):
1331 case LM85_REG_FAN_MIN(3):
1332 /* NOTE: ALARM is read only, so not included here */
1333 i2c_smbus_write_byte_data(client, reg, value & 0xff);
1334 i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1336 default: /* Write BYTE data */
1337 i2c_smbus_write_byte_data(client, reg, value);
1342 static struct lm85_data *lm85_update_device(struct device *dev)
1344 struct i2c_client *client = to_i2c_client(dev);
1345 struct lm85_data *data = i2c_get_clientdata(client);
1348 mutex_lock(&data->update_lock);
1351 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1352 /* Things that change quickly */
1353 dev_dbg(&client->dev, "Reading sensor values\n");
1355 /* Have to read extended bits first to "freeze" the
1356 * more significant bits that are read later.
1357 * There are 2 additional resolution bits per channel and we
1358 * have room for 4, so we shift them to the left.
1360 if (data->type == adm1027 || data->type == adt7463) {
1361 int ext1 = lm85_read_value(client,
1362 ADM1027_REG_EXTEND_ADC1);
1363 int ext2 = lm85_read_value(client,
1364 ADM1027_REG_EXTEND_ADC2);
1365 int val = (ext1 << 8) + ext2;
1367 for (i = 0; i <= 4; i++)
1369 ((val >> (i * 2)) & 0x03) << 2;
1371 for (i = 0; i <= 2; i++)
1373 (val >> ((i + 4) * 2)) & 0x0c;
1376 data->vid = lm85_read_value(client, LM85_REG_VID);
1378 for (i = 0; i <= 3; ++i) {
1380 lm85_read_value(client, LM85_REG_IN(i));
1382 lm85_read_value(client, LM85_REG_FAN(i));
1385 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1386 data->in[4] = lm85_read_value(client,
1390 for (i = 0; i <= 2; ++i) {
1392 lm85_read_value(client, LM85_REG_TEMP(i));
1394 lm85_read_value(client, LM85_REG_PWM(i));
1397 data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1399 if (data->type == emc6d100) {
1400 /* Three more voltage sensors */
1401 for (i = 5; i <= 7; ++i) {
1402 data->in[i] = lm85_read_value(client,
1403 EMC6D100_REG_IN(i));
1405 /* More alarm bits */
1406 data->alarms |= lm85_read_value(client,
1407 EMC6D100_REG_ALARM3) << 16;
1408 } else if (data->type == emc6d102) {
1409 /* Have to read LSB bits after the MSB ones because
1410 the reading of the MSB bits has frozen the
1411 LSBs (backward from the ADM1027).
1413 int ext1 = lm85_read_value(client,
1414 EMC6D102_REG_EXTEND_ADC1);
1415 int ext2 = lm85_read_value(client,
1416 EMC6D102_REG_EXTEND_ADC2);
1417 int ext3 = lm85_read_value(client,
1418 EMC6D102_REG_EXTEND_ADC3);
1419 int ext4 = lm85_read_value(client,
1420 EMC6D102_REG_EXTEND_ADC4);
1421 data->in_ext[0] = ext3 & 0x0f;
1422 data->in_ext[1] = ext4 & 0x0f;
1423 data->in_ext[2] = ext4 >> 4;
1424 data->in_ext[3] = ext3 >> 4;
1425 data->in_ext[4] = ext2 >> 4;
1427 data->temp_ext[0] = ext1 & 0x0f;
1428 data->temp_ext[1] = ext2 & 0x0f;
1429 data->temp_ext[2] = ext1 >> 4;
1432 data->last_reading = jiffies;
1433 } /* last_reading */
1436 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1437 /* Things that don't change often */
1438 dev_dbg(&client->dev, "Reading config values\n");
1440 for (i = 0; i <= 3; ++i) {
1442 lm85_read_value(client, LM85_REG_IN_MIN(i));
1444 lm85_read_value(client, LM85_REG_IN_MAX(i));
1446 lm85_read_value(client, LM85_REG_FAN_MIN(i));
1449 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1450 data->in_min[4] = lm85_read_value(client,
1451 LM85_REG_IN_MIN(4));
1452 data->in_max[4] = lm85_read_value(client,
1453 LM85_REG_IN_MAX(4));
1456 if (data->type == emc6d100) {
1457 for (i = 5; i <= 7; ++i) {
1458 data->in_min[i] = lm85_read_value(client,
1459 EMC6D100_REG_IN_MIN(i));
1460 data->in_max[i] = lm85_read_value(client,
1461 EMC6D100_REG_IN_MAX(i));
1465 for (i = 0; i <= 2; ++i) {
1469 lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1471 lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1473 data->autofan[i].config =
1474 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1475 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1476 data->pwm_freq[i] = val & 0x07;
1477 data->zone[i].range = val >> 4;
1478 data->autofan[i].min_pwm =
1479 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1480 data->zone[i].limit =
1481 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1482 data->zone[i].critical =
1483 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1486 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1487 data->autofan[0].min_off = (i & 0x20) != 0;
1488 data->autofan[1].min_off = (i & 0x40) != 0;
1489 data->autofan[2].min_off = (i & 0x80) != 0;
1491 i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1492 data->zone[0].hyst = i >> 4;
1493 data->zone[1].hyst = i & 0x0f;
1495 i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1496 data->zone[2].hyst = i >> 4;
1498 data->last_config = jiffies;
1503 mutex_unlock(&data->update_lock);
1509 static int __init sm_lm85_init(void)
1511 return i2c_add_driver(&lm85_driver);
1514 static void __exit sm_lm85_exit(void)
1516 i2c_del_driver(&lm85_driver);
1519 MODULE_LICENSE("GPL");
1520 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1521 "Margit Schubert-While <margitsw@t-online.de>, "
1522 "Justin Thiessen <jthiessen@penguincomputing.com>");
1523 MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1525 module_init(sm_lm85_init);
1526 module_exit(sm_lm85_exit);