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>
9 Chip details at <http://www.national.com/ds/LM/LM85.pdf>
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/jiffies.h>
30 #include <linux/i2c.h>
31 #include <linux/hwmon.h>
32 #include <linux/hwmon-vid.h>
33 #include <linux/hwmon-sysfs.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
37 /* Addresses to scan */
38 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
40 /* Insmod parameters */
41 I2C_CLIENT_INSMOD_6(lm85b, lm85c, adm1027, adt7463, emc6d100, emc6d102);
43 /* The LM85 registers */
45 #define LM85_REG_IN(nr) (0x20 + (nr))
46 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2)
47 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2)
49 #define LM85_REG_TEMP(nr) (0x25 + (nr))
50 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2)
51 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2)
53 /* Fan speeds are LSB, MSB (2 bytes) */
54 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2)
55 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2)
57 #define LM85_REG_PWM(nr) (0x30 + (nr))
59 #define LM85_REG_COMPANY 0x3e
60 #define LM85_REG_VERSTEP 0x3f
61 /* These are the recognized values for the above regs */
62 #define LM85_COMPANY_NATIONAL 0x01
63 #define LM85_COMPANY_ANALOG_DEV 0x41
64 #define LM85_COMPANY_SMSC 0x5c
65 #define LM85_VERSTEP_VMASK 0xf0
66 #define LM85_VERSTEP_GENERIC 0x60
67 #define LM85_VERSTEP_LM85C 0x60
68 #define LM85_VERSTEP_LM85B 0x62
69 #define LM85_VERSTEP_ADM1027 0x60
70 #define LM85_VERSTEP_ADT7463 0x62
71 #define LM85_VERSTEP_ADT7463C 0x6A
72 #define LM85_VERSTEP_EMC6D100_A0 0x60
73 #define LM85_VERSTEP_EMC6D100_A1 0x61
74 #define LM85_VERSTEP_EMC6D102 0x65
76 #define LM85_REG_CONFIG 0x40
78 #define LM85_REG_ALARM1 0x41
79 #define LM85_REG_ALARM2 0x42
81 #define LM85_REG_VID 0x43
83 /* Automated FAN control */
84 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr))
85 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr))
86 #define LM85_REG_AFAN_SPIKE1 0x62
87 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr))
88 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr))
89 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr))
90 #define LM85_REG_AFAN_HYST1 0x6d
91 #define LM85_REG_AFAN_HYST2 0x6e
93 #define ADM1027_REG_EXTEND_ADC1 0x76
94 #define ADM1027_REG_EXTEND_ADC2 0x77
96 #define EMC6D100_REG_ALARM3 0x7d
97 /* IN5, IN6 and IN7 */
98 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5))
99 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2)
100 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2)
101 #define EMC6D102_REG_EXTEND_ADC1 0x85
102 #define EMC6D102_REG_EXTEND_ADC2 0x86
103 #define EMC6D102_REG_EXTEND_ADC3 0x87
104 #define EMC6D102_REG_EXTEND_ADC4 0x88
107 /* Conversions. Rounding and limit checking is only done on the TO_REG
108 variants. Note that you should be a bit careful with which arguments
109 these macros are called: arguments may be evaluated more than once.
112 /* IN are scaled acording to built-in resistors */
113 static const int lm85_scaling[] = { /* .001 Volts */
114 2500, 2250, 3300, 5000, 12000,
115 3300, 1500, 1800 /*EMC6D100*/
117 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
119 #define INS_TO_REG(n, val) \
120 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255)
122 #define INSEXT_FROM_REG(n, val, ext) \
123 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])
125 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n])
127 /* FAN speed is measured using 90kHz clock */
128 static inline u16 FAN_TO_REG(unsigned long val)
132 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe);
134 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
137 /* Temperature is reported in .001 degC increments */
138 #define TEMP_TO_REG(val) \
139 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127)
140 #define TEMPEXT_FROM_REG(val, ext) \
141 SCALE(((val) << 4) + (ext), 16, 1000)
142 #define TEMP_FROM_REG(val) ((val) * 1000)
144 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255)
145 #define PWM_FROM_REG(val) (val)
148 /* ZONEs have the following parameters:
149 * Limit (low) temp, 1. degC
150 * Hysteresis (below limit), 1. degC (0-15)
151 * Range of speed control, .1 degC (2-80)
152 * Critical (high) temp, 1. degC
154 * FAN PWMs have the following parameters:
155 * Reference Zone, 1, 2, 3, etc.
156 * Spinup time, .05 sec
157 * PWM value at limit/low temp, 1 count
158 * PWM Frequency, 1. Hz
159 * PWM is Min or OFF below limit, flag
160 * Invert PWM output, flag
162 * Some chips filter the temp, others the fan.
163 * Filter constant (or disabled) .1 seconds
166 /* These are the zone temperature range encodings in .001 degree C */
167 static const int lm85_range_map[] = {
168 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
169 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
172 static int RANGE_TO_REG(int range)
176 if (range >= lm85_range_map[15])
179 /* Find the closest match */
180 for (i = 14; i >= 0; --i) {
181 if (range >= lm85_range_map[i]) {
182 if ((lm85_range_map[i + 1] - range) <
183 (range - lm85_range_map[i]))
191 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
193 /* These are the PWM frequency encodings */
194 static const int lm85_freq_map[8] = { /* 1 Hz */
195 10, 15, 23, 30, 38, 47, 62, 94
198 static int FREQ_TO_REG(int freq)
202 if (freq >= lm85_freq_map[7])
204 for (i = 0; i < 7; ++i)
205 if (freq <= lm85_freq_map[i])
209 #define FREQ_FROM_REG(val) lm85_freq_map[(val) & 0x07]
211 /* Since we can't use strings, I'm abusing these numbers
212 * to stand in for the following meanings:
213 * 1 -- PWM responds to Zone 1
214 * 2 -- PWM responds to Zone 2
215 * 3 -- PWM responds to Zone 3
216 * 23 -- PWM responds to the higher temp of Zone 2 or 3
217 * 123 -- PWM responds to highest of Zone 1, 2, or 3
218 * 0 -- PWM is always at 0% (ie, off)
219 * -1 -- PWM is always at 100%
220 * -2 -- PWM responds to manual control
223 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
224 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5]
226 static int ZONE_TO_REG(int zone)
230 for (i = 0; i <= 7; ++i)
231 if (zone == lm85_zone_map[i])
233 if (i > 7) /* Not found. */
234 i = 3; /* Always 100% */
238 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15)
239 #define HYST_FROM_REG(val) ((val) * 1000)
241 /* Chip sampling rates
243 * Some sensors are not updated more frequently than once per second
244 * so it doesn't make sense to read them more often than that.
245 * We cache the results and return the saved data if the driver
246 * is called again before a second has elapsed.
248 * Also, there is significant configuration data for this chip
249 * given the automatic PWM fan control that is possible. There
250 * are about 47 bytes of config data to only 22 bytes of actual
251 * readings. So, we keep the config data up to date in the cache
252 * when it is written and only sample it once every 1 *minute*
254 #define LM85_DATA_INTERVAL (HZ + HZ / 2)
255 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ)
257 /* LM85 can automatically adjust fan speeds based on temperature
258 * This structure encapsulates an entire Zone config. There are
259 * three zones (one for each temperature input) on the lm85
262 s8 limit; /* Low temp limit */
263 u8 hyst; /* Low limit hysteresis. (0-15) */
264 u8 range; /* Temp range, encoded */
265 s8 critical; /* "All fans ON" temp limit */
266 u8 off_desired; /* Actual "off" temperature specified. Preserved
267 * to prevent "drift" as other autofan control
270 u8 max_desired; /* Actual "max" temperature specified. Preserved
271 * to prevent "drift" as other autofan control
276 struct lm85_autofan {
277 u8 config; /* Register value */
278 u8 min_pwm; /* Minimum PWM value, encoded */
279 u8 min_off; /* Min PWM or OFF below "limit", flag */
282 /* For each registered chip, we need to keep some data in memory.
283 The structure is dynamically allocated. */
285 struct i2c_client client;
286 struct device *hwmon_dev;
289 struct mutex update_lock;
290 int valid; /* !=0 if following fields are valid */
291 unsigned long last_reading; /* In jiffies */
292 unsigned long last_config; /* In jiffies */
294 u8 in[8]; /* Register value */
295 u8 in_max[8]; /* Register value */
296 u8 in_min[8]; /* Register value */
297 s8 temp[3]; /* Register value */
298 s8 temp_min[3]; /* Register value */
299 s8 temp_max[3]; /* Register value */
300 u16 fan[4]; /* Register value */
301 u16 fan_min[4]; /* Register value */
302 u8 pwm[3]; /* Register value */
303 u8 pwm_freq[3]; /* Register encoding */
304 u8 temp_ext[3]; /* Decoded values */
305 u8 in_ext[8]; /* Decoded values */
306 u8 vid; /* Register value */
307 u8 vrm; /* VRM version */
308 u32 alarms; /* Register encoding, combined */
309 struct lm85_autofan autofan[3];
310 struct lm85_zone zone[3];
313 static int lm85_attach_adapter(struct i2c_adapter *adapter);
314 static int lm85_detect(struct i2c_adapter *adapter, int address,
316 static int lm85_detach_client(struct i2c_client *client);
318 static int lm85_read_value(struct i2c_client *client, u8 reg);
319 static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
320 static struct lm85_data *lm85_update_device(struct device *dev);
323 static struct i2c_driver lm85_driver = {
327 .attach_adapter = lm85_attach_adapter,
328 .detach_client = lm85_detach_client,
333 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
336 int nr = to_sensor_dev_attr(attr)->index;
337 struct lm85_data *data = lm85_update_device(dev);
338 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
341 static ssize_t show_fan_min(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_min[nr]));
349 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
350 const char *buf, size_t count)
352 int nr = to_sensor_dev_attr(attr)->index;
353 struct i2c_client *client = to_i2c_client(dev);
354 struct lm85_data *data = i2c_get_clientdata(client);
355 unsigned long val = simple_strtoul(buf, NULL, 10);
357 mutex_lock(&data->update_lock);
358 data->fan_min[nr] = FAN_TO_REG(val);
359 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
360 mutex_unlock(&data->update_lock);
364 #define show_fan_offset(offset) \
365 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
366 show_fan, NULL, offset - 1); \
367 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
368 show_fan_min, set_fan_min, offset - 1)
375 /* vid, vrm, alarms */
377 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
380 struct lm85_data *data = lm85_update_device(dev);
383 if (data->type == adt7463 && (data->vid & 0x80)) {
384 /* 6-pin VID (VRM 10) */
385 vid = vid_from_reg(data->vid & 0x3f, data->vrm);
387 /* 5-pin VID (VRM 9) */
388 vid = vid_from_reg(data->vid & 0x1f, data->vrm);
391 return sprintf(buf, "%d\n", vid);
394 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
396 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
399 struct lm85_data *data = dev_get_drvdata(dev);
400 return sprintf(buf, "%ld\n", (long) data->vrm);
403 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
404 const char *buf, size_t count)
406 struct lm85_data *data = dev_get_drvdata(dev);
407 data->vrm = simple_strtoul(buf, NULL, 10);
411 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
413 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
416 struct lm85_data *data = lm85_update_device(dev);
417 return sprintf(buf, "%u\n", data->alarms);
420 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
422 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
425 int nr = to_sensor_dev_attr(attr)->index;
426 struct lm85_data *data = lm85_update_device(dev);
427 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
430 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
431 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
432 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
433 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
434 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
435 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
436 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
437 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
438 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
439 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
440 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
441 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
442 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
443 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
444 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
445 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
446 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
450 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
453 int nr = to_sensor_dev_attr(attr)->index;
454 struct lm85_data *data = lm85_update_device(dev);
455 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
458 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
459 const char *buf, size_t count)
461 int nr = to_sensor_dev_attr(attr)->index;
462 struct i2c_client *client = to_i2c_client(dev);
463 struct lm85_data *data = i2c_get_clientdata(client);
464 long val = simple_strtol(buf, NULL, 10);
466 mutex_lock(&data->update_lock);
467 data->pwm[nr] = PWM_TO_REG(val);
468 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
469 mutex_unlock(&data->update_lock);
473 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
476 int nr = to_sensor_dev_attr(attr)->index;
477 struct lm85_data *data = lm85_update_device(dev);
478 int pwm_zone, enable;
480 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
482 case -1: /* PWM is always at 100% */
485 case 0: /* PWM is always at 0% */
486 case -2: /* PWM responds to manual control */
489 default: /* PWM in automatic mode */
492 return sprintf(buf, "%d\n", enable);
495 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
496 *attr, const char *buf, size_t count)
498 int nr = to_sensor_dev_attr(attr)->index;
499 struct i2c_client *client = to_i2c_client(dev);
500 struct lm85_data *data = i2c_get_clientdata(client);
501 long val = simple_strtol(buf, NULL, 10);
512 /* Here we have to choose arbitrarily one of the 5 possible
513 configurations; I go for the safest */
520 mutex_lock(&data->update_lock);
521 data->autofan[nr].config = lm85_read_value(client,
522 LM85_REG_AFAN_CONFIG(nr));
523 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
525 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
526 data->autofan[nr].config);
527 mutex_unlock(&data->update_lock);
531 static ssize_t show_pwm_freq(struct device *dev,
532 struct device_attribute *attr, char *buf)
534 int nr = to_sensor_dev_attr(attr)->index;
535 struct lm85_data *data = lm85_update_device(dev);
536 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->pwm_freq[nr]));
539 static ssize_t set_pwm_freq(struct device *dev,
540 struct device_attribute *attr, const char *buf, size_t count)
542 int nr = to_sensor_dev_attr(attr)->index;
543 struct i2c_client *client = to_i2c_client(dev);
544 struct lm85_data *data = i2c_get_clientdata(client);
545 long val = simple_strtol(buf, NULL, 10);
547 mutex_lock(&data->update_lock);
548 data->pwm_freq[nr] = FREQ_TO_REG(val);
549 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
550 (data->zone[nr].range << 4)
551 | data->pwm_freq[nr]);
552 mutex_unlock(&data->update_lock);
556 #define show_pwm_reg(offset) \
557 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
558 show_pwm, set_pwm, offset - 1); \
559 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
560 show_pwm_enable, set_pwm_enable, offset - 1); \
561 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
562 show_pwm_freq, set_pwm_freq, offset - 1)
570 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
573 int nr = to_sensor_dev_attr(attr)->index;
574 struct lm85_data *data = lm85_update_device(dev);
575 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
579 static ssize_t show_in_min(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", INS_FROM_REG(nr, data->in_min[nr]));
587 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
588 const char *buf, size_t count)
590 int nr = to_sensor_dev_attr(attr)->index;
591 struct i2c_client *client = to_i2c_client(dev);
592 struct lm85_data *data = i2c_get_clientdata(client);
593 long val = simple_strtol(buf, NULL, 10);
595 mutex_lock(&data->update_lock);
596 data->in_min[nr] = INS_TO_REG(nr, val);
597 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
598 mutex_unlock(&data->update_lock);
602 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
605 int nr = to_sensor_dev_attr(attr)->index;
606 struct lm85_data *data = lm85_update_device(dev);
607 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
610 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
611 const char *buf, size_t count)
613 int nr = to_sensor_dev_attr(attr)->index;
614 struct i2c_client *client = to_i2c_client(dev);
615 struct lm85_data *data = i2c_get_clientdata(client);
616 long val = simple_strtol(buf, NULL, 10);
618 mutex_lock(&data->update_lock);
619 data->in_max[nr] = INS_TO_REG(nr, val);
620 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
621 mutex_unlock(&data->update_lock);
625 #define show_in_reg(offset) \
626 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
627 show_in, NULL, offset); \
628 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
629 show_in_min, set_in_min, offset); \
630 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
631 show_in_max, set_in_max, offset)
644 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
647 int nr = to_sensor_dev_attr(attr)->index;
648 struct lm85_data *data = lm85_update_device(dev);
649 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
650 data->temp_ext[nr]));
653 static ssize_t show_temp_min(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", TEMP_FROM_REG(data->temp_min[nr]));
661 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
662 const char *buf, size_t count)
664 int nr = to_sensor_dev_attr(attr)->index;
665 struct i2c_client *client = to_i2c_client(dev);
666 struct lm85_data *data = i2c_get_clientdata(client);
667 long val = simple_strtol(buf, NULL, 10);
669 mutex_lock(&data->update_lock);
670 data->temp_min[nr] = TEMP_TO_REG(val);
671 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
672 mutex_unlock(&data->update_lock);
676 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
679 int nr = to_sensor_dev_attr(attr)->index;
680 struct lm85_data *data = lm85_update_device(dev);
681 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
684 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
685 const char *buf, size_t count)
687 int nr = to_sensor_dev_attr(attr)->index;
688 struct i2c_client *client = to_i2c_client(dev);
689 struct lm85_data *data = i2c_get_clientdata(client);
690 long val = simple_strtol(buf, NULL, 10);
692 mutex_lock(&data->update_lock);
693 data->temp_max[nr] = TEMP_TO_REG(val);
694 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
695 mutex_unlock(&data->update_lock);
699 #define show_temp_reg(offset) \
700 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
701 show_temp, NULL, offset - 1); \
702 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
703 show_temp_min, set_temp_min, offset - 1); \
704 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
705 show_temp_max, set_temp_max, offset - 1);
712 /* Automatic PWM control */
714 static ssize_t show_pwm_auto_channels(struct device *dev,
715 struct device_attribute *attr, char *buf)
717 int nr = to_sensor_dev_attr(attr)->index;
718 struct lm85_data *data = lm85_update_device(dev);
719 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
722 static ssize_t set_pwm_auto_channels(struct device *dev,
723 struct device_attribute *attr, const char *buf, size_t count)
725 int nr = to_sensor_dev_attr(attr)->index;
726 struct i2c_client *client = to_i2c_client(dev);
727 struct lm85_data *data = i2c_get_clientdata(client);
728 long val = simple_strtol(buf, NULL, 10);
730 mutex_lock(&data->update_lock);
731 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
733 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
734 data->autofan[nr].config);
735 mutex_unlock(&data->update_lock);
739 static ssize_t show_pwm_auto_pwm_min(struct device *dev,
740 struct device_attribute *attr, char *buf)
742 int nr = to_sensor_dev_attr(attr)->index;
743 struct lm85_data *data = lm85_update_device(dev);
744 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
747 static ssize_t set_pwm_auto_pwm_min(struct device *dev,
748 struct device_attribute *attr, const char *buf, size_t count)
750 int nr = to_sensor_dev_attr(attr)->index;
751 struct i2c_client *client = to_i2c_client(dev);
752 struct lm85_data *data = i2c_get_clientdata(client);
753 long val = simple_strtol(buf, NULL, 10);
755 mutex_lock(&data->update_lock);
756 data->autofan[nr].min_pwm = PWM_TO_REG(val);
757 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
758 data->autofan[nr].min_pwm);
759 mutex_unlock(&data->update_lock);
763 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
764 struct device_attribute *attr, char *buf)
766 int nr = to_sensor_dev_attr(attr)->index;
767 struct lm85_data *data = lm85_update_device(dev);
768 return sprintf(buf, "%d\n", data->autofan[nr].min_off);
771 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
772 struct device_attribute *attr, const char *buf, size_t count)
774 int nr = to_sensor_dev_attr(attr)->index;
775 struct i2c_client *client = to_i2c_client(dev);
776 struct lm85_data *data = i2c_get_clientdata(client);
777 long val = simple_strtol(buf, NULL, 10);
780 mutex_lock(&data->update_lock);
781 data->autofan[nr].min_off = val;
782 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
783 tmp &= ~(0x20 << nr);
784 if (data->autofan[nr].min_off)
786 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
787 mutex_unlock(&data->update_lock);
791 #define pwm_auto(offset) \
792 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
793 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
794 set_pwm_auto_channels, offset - 1); \
795 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
796 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \
797 set_pwm_auto_pwm_min, offset - 1); \
798 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
799 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
800 set_pwm_auto_pwm_minctl, offset - 1)
806 /* Temperature settings for automatic PWM control */
808 static ssize_t show_temp_auto_temp_off(struct device *dev,
809 struct device_attribute *attr, char *buf)
811 int nr = to_sensor_dev_attr(attr)->index;
812 struct lm85_data *data = lm85_update_device(dev);
813 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
814 HYST_FROM_REG(data->zone[nr].hyst));
817 static ssize_t set_temp_auto_temp_off(struct device *dev,
818 struct device_attribute *attr, const char *buf, size_t count)
820 int nr = to_sensor_dev_attr(attr)->index;
821 struct i2c_client *client = to_i2c_client(dev);
822 struct lm85_data *data = i2c_get_clientdata(client);
824 long val = simple_strtol(buf, NULL, 10);
826 mutex_lock(&data->update_lock);
827 min = TEMP_FROM_REG(data->zone[nr].limit);
828 data->zone[nr].off_desired = TEMP_TO_REG(val);
829 data->zone[nr].hyst = HYST_TO_REG(min - val);
830 if (nr == 0 || nr == 1) {
831 lm85_write_value(client, LM85_REG_AFAN_HYST1,
832 (data->zone[0].hyst << 4)
833 | data->zone[1].hyst);
835 lm85_write_value(client, LM85_REG_AFAN_HYST2,
836 (data->zone[2].hyst << 4));
838 mutex_unlock(&data->update_lock);
842 static ssize_t show_temp_auto_temp_min(struct device *dev,
843 struct device_attribute *attr, char *buf)
845 int nr = to_sensor_dev_attr(attr)->index;
846 struct lm85_data *data = lm85_update_device(dev);
847 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
850 static ssize_t set_temp_auto_temp_min(struct device *dev,
851 struct device_attribute *attr, const char *buf, size_t count)
853 int nr = to_sensor_dev_attr(attr)->index;
854 struct i2c_client *client = to_i2c_client(dev);
855 struct lm85_data *data = i2c_get_clientdata(client);
856 long val = simple_strtol(buf, NULL, 10);
858 mutex_lock(&data->update_lock);
859 data->zone[nr].limit = TEMP_TO_REG(val);
860 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
861 data->zone[nr].limit);
863 /* Update temp_auto_max and temp_auto_range */
864 data->zone[nr].range = RANGE_TO_REG(
865 TEMP_FROM_REG(data->zone[nr].max_desired) -
866 TEMP_FROM_REG(data->zone[nr].limit));
867 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
868 ((data->zone[nr].range & 0x0f) << 4)
869 | (data->pwm_freq[nr] & 0x07));
871 /* Update temp_auto_hyst and temp_auto_off */
872 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
873 data->zone[nr].limit) - TEMP_FROM_REG(
874 data->zone[nr].off_desired));
875 if (nr == 0 || nr == 1) {
876 lm85_write_value(client, LM85_REG_AFAN_HYST1,
877 (data->zone[0].hyst << 4)
878 | data->zone[1].hyst);
880 lm85_write_value(client, LM85_REG_AFAN_HYST2,
881 (data->zone[2].hyst << 4));
883 mutex_unlock(&data->update_lock);
887 static ssize_t show_temp_auto_temp_max(struct device *dev,
888 struct device_attribute *attr, char *buf)
890 int nr = to_sensor_dev_attr(attr)->index;
891 struct lm85_data *data = lm85_update_device(dev);
892 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
893 RANGE_FROM_REG(data->zone[nr].range));
896 static ssize_t set_temp_auto_temp_max(struct device *dev,
897 struct device_attribute *attr, const char *buf, size_t count)
899 int nr = to_sensor_dev_attr(attr)->index;
900 struct i2c_client *client = to_i2c_client(dev);
901 struct lm85_data *data = i2c_get_clientdata(client);
903 long val = simple_strtol(buf, NULL, 10);
905 mutex_lock(&data->update_lock);
906 min = TEMP_FROM_REG(data->zone[nr].limit);
907 data->zone[nr].max_desired = TEMP_TO_REG(val);
908 data->zone[nr].range = RANGE_TO_REG(
910 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
911 ((data->zone[nr].range & 0x0f) << 4)
912 | (data->pwm_freq[nr] & 0x07));
913 mutex_unlock(&data->update_lock);
917 static ssize_t show_temp_auto_temp_crit(struct device *dev,
918 struct device_attribute *attr, char *buf)
920 int nr = to_sensor_dev_attr(attr)->index;
921 struct lm85_data *data = lm85_update_device(dev);
922 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
925 static ssize_t set_temp_auto_temp_crit(struct device *dev,
926 struct device_attribute *attr, const char *buf, size_t count)
928 int nr = to_sensor_dev_attr(attr)->index;
929 struct i2c_client *client = to_i2c_client(dev);
930 struct lm85_data *data = i2c_get_clientdata(client);
931 long val = simple_strtol(buf, NULL, 10);
933 mutex_lock(&data->update_lock);
934 data->zone[nr].critical = TEMP_TO_REG(val);
935 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
936 data->zone[nr].critical);
937 mutex_unlock(&data->update_lock);
941 #define temp_auto(offset) \
942 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \
943 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \
944 set_temp_auto_temp_off, offset - 1); \
945 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \
946 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \
947 set_temp_auto_temp_min, offset - 1); \
948 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \
949 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \
950 set_temp_auto_temp_max, offset - 1); \
951 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \
952 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \
953 set_temp_auto_temp_crit, offset - 1);
959 static int lm85_attach_adapter(struct i2c_adapter *adapter)
961 if (!(adapter->class & I2C_CLASS_HWMON))
963 return i2c_probe(adapter, &addr_data, lm85_detect);
966 static struct attribute *lm85_attributes[] = {
967 &sensor_dev_attr_fan1_input.dev_attr.attr,
968 &sensor_dev_attr_fan2_input.dev_attr.attr,
969 &sensor_dev_attr_fan3_input.dev_attr.attr,
970 &sensor_dev_attr_fan4_input.dev_attr.attr,
971 &sensor_dev_attr_fan1_min.dev_attr.attr,
972 &sensor_dev_attr_fan2_min.dev_attr.attr,
973 &sensor_dev_attr_fan3_min.dev_attr.attr,
974 &sensor_dev_attr_fan4_min.dev_attr.attr,
975 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
976 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
977 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
978 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
980 &sensor_dev_attr_pwm1.dev_attr.attr,
981 &sensor_dev_attr_pwm2.dev_attr.attr,
982 &sensor_dev_attr_pwm3.dev_attr.attr,
983 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
984 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
985 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
986 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
987 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
988 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
990 &sensor_dev_attr_in0_input.dev_attr.attr,
991 &sensor_dev_attr_in1_input.dev_attr.attr,
992 &sensor_dev_attr_in2_input.dev_attr.attr,
993 &sensor_dev_attr_in3_input.dev_attr.attr,
994 &sensor_dev_attr_in0_min.dev_attr.attr,
995 &sensor_dev_attr_in1_min.dev_attr.attr,
996 &sensor_dev_attr_in2_min.dev_attr.attr,
997 &sensor_dev_attr_in3_min.dev_attr.attr,
998 &sensor_dev_attr_in0_max.dev_attr.attr,
999 &sensor_dev_attr_in1_max.dev_attr.attr,
1000 &sensor_dev_attr_in2_max.dev_attr.attr,
1001 &sensor_dev_attr_in3_max.dev_attr.attr,
1002 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1003 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1004 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1005 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1007 &sensor_dev_attr_temp1_input.dev_attr.attr,
1008 &sensor_dev_attr_temp2_input.dev_attr.attr,
1009 &sensor_dev_attr_temp3_input.dev_attr.attr,
1010 &sensor_dev_attr_temp1_min.dev_attr.attr,
1011 &sensor_dev_attr_temp2_min.dev_attr.attr,
1012 &sensor_dev_attr_temp3_min.dev_attr.attr,
1013 &sensor_dev_attr_temp1_max.dev_attr.attr,
1014 &sensor_dev_attr_temp2_max.dev_attr.attr,
1015 &sensor_dev_attr_temp3_max.dev_attr.attr,
1016 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1017 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1018 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1019 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1020 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1022 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1023 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1024 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1025 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1026 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1027 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1028 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1029 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1030 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1032 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1033 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1034 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1035 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1036 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1037 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1038 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1039 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1040 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1041 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1042 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1043 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1046 &dev_attr_cpu0_vid.attr,
1047 &dev_attr_alarms.attr,
1051 static const struct attribute_group lm85_group = {
1052 .attrs = lm85_attributes,
1055 static struct attribute *lm85_attributes_in4[] = {
1056 &sensor_dev_attr_in4_input.dev_attr.attr,
1057 &sensor_dev_attr_in4_min.dev_attr.attr,
1058 &sensor_dev_attr_in4_max.dev_attr.attr,
1059 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1063 static const struct attribute_group lm85_group_in4 = {
1064 .attrs = lm85_attributes_in4,
1067 static struct attribute *lm85_attributes_in567[] = {
1068 &sensor_dev_attr_in5_input.dev_attr.attr,
1069 &sensor_dev_attr_in6_input.dev_attr.attr,
1070 &sensor_dev_attr_in7_input.dev_attr.attr,
1071 &sensor_dev_attr_in5_min.dev_attr.attr,
1072 &sensor_dev_attr_in6_min.dev_attr.attr,
1073 &sensor_dev_attr_in7_min.dev_attr.attr,
1074 &sensor_dev_attr_in5_max.dev_attr.attr,
1075 &sensor_dev_attr_in6_max.dev_attr.attr,
1076 &sensor_dev_attr_in7_max.dev_attr.attr,
1077 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1078 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1079 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1083 static const struct attribute_group lm85_group_in567 = {
1084 .attrs = lm85_attributes_in567,
1087 static void lm85_init_client(struct i2c_client *client)
1091 /* Start monitoring if needed */
1092 value = lm85_read_value(client, LM85_REG_CONFIG);
1093 if (!(value & 0x01)) {
1094 dev_info(&client->dev, "Starting monitoring\n");
1095 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1098 /* Warn about unusual configuration bits */
1100 dev_warn(&client->dev, "Device configuration is locked\n");
1101 if (!(value & 0x04))
1102 dev_warn(&client->dev, "Device is not ready\n");
1105 static int lm85_detect(struct i2c_adapter *adapter, int address,
1108 struct i2c_client *client;
1109 struct lm85_data *data;
1111 const char *type_name;
1113 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1114 /* We need to be able to do byte I/O */
1118 if (!(data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL))) {
1123 client = &data->client;
1124 i2c_set_clientdata(client, data);
1125 client->addr = address;
1126 client->adapter = adapter;
1127 client->driver = &lm85_driver;
1129 /* If auto-detecting, determine the chip type */
1131 int company = lm85_read_value(client, LM85_REG_COMPANY);
1132 int verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1134 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1135 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1136 address, company, verstep);
1138 /* All supported chips have the version in common */
1139 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC) {
1140 dev_dbg(&adapter->dev, "Autodetection failed: "
1141 "unsupported version\n");
1146 /* Now, refine the detection */
1147 if (company == LM85_COMPANY_NATIONAL) {
1149 case LM85_VERSTEP_LM85C:
1152 case LM85_VERSTEP_LM85B:
1156 } else if (company == LM85_COMPANY_ANALOG_DEV) {
1158 case LM85_VERSTEP_ADM1027:
1161 case LM85_VERSTEP_ADT7463:
1162 case LM85_VERSTEP_ADT7463C:
1166 } else if (company == LM85_COMPANY_SMSC) {
1168 case LM85_VERSTEP_EMC6D100_A0:
1169 case LM85_VERSTEP_EMC6D100_A1:
1170 /* Note: we can't tell a '100 from a '101 */
1173 case LM85_VERSTEP_EMC6D102:
1178 dev_dbg(&adapter->dev, "Autodetection failed: "
1179 "unknown vendor\n");
1184 /* Fill in the chip specific driver values */
1187 type_name = "lm85b";
1190 type_name = "lm85c";
1193 type_name = "adm1027";
1196 type_name = "adt7463";
1199 type_name = "emc6d100";
1202 type_name = "emc6d102";
1207 strlcpy(client->name, type_name, I2C_NAME_SIZE);
1209 /* Fill in the remaining client fields */
1211 mutex_init(&data->update_lock);
1213 /* Tell the I2C layer a new client has arrived */
1214 err = i2c_attach_client(client);
1218 /* Set the VRM version */
1219 data->vrm = vid_which_vrm();
1221 /* Initialize the LM85 chip */
1222 lm85_init_client(client);
1224 /* Register sysfs hooks */
1225 err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1229 /* The ADT7463 has an optional VRM 10 mode where pin 21 is used
1230 as a sixth digital VID input rather than an analog input. */
1231 data->vid = lm85_read_value(client, LM85_REG_VID);
1232 if (!(kind == adt7463 && (data->vid & 0x80)))
1233 if ((err = sysfs_create_group(&client->dev.kobj,
1237 /* The EMC6D100 has 3 additional voltage inputs */
1238 if (kind == emc6d100)
1239 if ((err = sysfs_create_group(&client->dev.kobj,
1240 &lm85_group_in567)))
1243 data->hwmon_dev = hwmon_device_register(&client->dev);
1244 if (IS_ERR(data->hwmon_dev)) {
1245 err = PTR_ERR(data->hwmon_dev);
1251 /* Error out and cleanup code */
1253 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1254 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1255 if (kind == emc6d100)
1256 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1258 i2c_detach_client(client);
1265 static int lm85_detach_client(struct i2c_client *client)
1267 struct lm85_data *data = i2c_get_clientdata(client);
1268 hwmon_device_unregister(data->hwmon_dev);
1269 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1270 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1271 if (data->type == emc6d100)
1272 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1273 i2c_detach_client(client);
1279 static int lm85_read_value(struct i2c_client *client, u8 reg)
1283 /* What size location is it? */
1285 case LM85_REG_FAN(0): /* Read WORD data */
1286 case LM85_REG_FAN(1):
1287 case LM85_REG_FAN(2):
1288 case LM85_REG_FAN(3):
1289 case LM85_REG_FAN_MIN(0):
1290 case LM85_REG_FAN_MIN(1):
1291 case LM85_REG_FAN_MIN(2):
1292 case LM85_REG_FAN_MIN(3):
1293 case LM85_REG_ALARM1: /* Read both bytes at once */
1294 res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1295 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1297 default: /* Read BYTE data */
1298 res = i2c_smbus_read_byte_data(client, reg);
1305 static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1308 case LM85_REG_FAN(0): /* Write 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 /* NOTE: ALARM is read only, so not included here */
1317 i2c_smbus_write_byte_data(client, reg, value & 0xff);
1318 i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1320 default: /* Write BYTE data */
1321 i2c_smbus_write_byte_data(client, reg, value);
1326 static struct lm85_data *lm85_update_device(struct device *dev)
1328 struct i2c_client *client = to_i2c_client(dev);
1329 struct lm85_data *data = i2c_get_clientdata(client);
1332 mutex_lock(&data->update_lock);
1335 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1336 /* Things that change quickly */
1337 dev_dbg(&client->dev, "Reading sensor values\n");
1339 /* Have to read extended bits first to "freeze" the
1340 * more significant bits that are read later.
1341 * There are 2 additional resolution bits per channel and we
1342 * have room for 4, so we shift them to the left.
1344 if (data->type == adm1027 || data->type == adt7463) {
1345 int ext1 = lm85_read_value(client,
1346 ADM1027_REG_EXTEND_ADC1);
1347 int ext2 = lm85_read_value(client,
1348 ADM1027_REG_EXTEND_ADC2);
1349 int val = (ext1 << 8) + ext2;
1351 for (i = 0; i <= 4; i++)
1353 ((val >> (i * 2)) & 0x03) << 2;
1355 for (i = 0; i <= 2; i++)
1357 (val >> ((i + 4) * 2)) & 0x0c;
1360 data->vid = lm85_read_value(client, LM85_REG_VID);
1362 for (i = 0; i <= 3; ++i) {
1364 lm85_read_value(client, LM85_REG_IN(i));
1366 lm85_read_value(client, LM85_REG_FAN(i));
1369 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1370 data->in[4] = lm85_read_value(client,
1374 for (i = 0; i <= 2; ++i) {
1376 lm85_read_value(client, LM85_REG_TEMP(i));
1378 lm85_read_value(client, LM85_REG_PWM(i));
1381 data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1383 if (data->type == emc6d100) {
1384 /* Three more voltage sensors */
1385 for (i = 5; i <= 7; ++i) {
1386 data->in[i] = lm85_read_value(client,
1387 EMC6D100_REG_IN(i));
1389 /* More alarm bits */
1390 data->alarms |= lm85_read_value(client,
1391 EMC6D100_REG_ALARM3) << 16;
1392 } else if (data->type == emc6d102) {
1393 /* Have to read LSB bits after the MSB ones because
1394 the reading of the MSB bits has frozen the
1395 LSBs (backward from the ADM1027).
1397 int ext1 = lm85_read_value(client,
1398 EMC6D102_REG_EXTEND_ADC1);
1399 int ext2 = lm85_read_value(client,
1400 EMC6D102_REG_EXTEND_ADC2);
1401 int ext3 = lm85_read_value(client,
1402 EMC6D102_REG_EXTEND_ADC3);
1403 int ext4 = lm85_read_value(client,
1404 EMC6D102_REG_EXTEND_ADC4);
1405 data->in_ext[0] = ext3 & 0x0f;
1406 data->in_ext[1] = ext4 & 0x0f;
1407 data->in_ext[2] = ext4 >> 4;
1408 data->in_ext[3] = ext3 >> 4;
1409 data->in_ext[4] = ext2 >> 4;
1411 data->temp_ext[0] = ext1 & 0x0f;
1412 data->temp_ext[1] = ext2 & 0x0f;
1413 data->temp_ext[2] = ext1 >> 4;
1416 data->last_reading = jiffies;
1417 } /* last_reading */
1420 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1421 /* Things that don't change often */
1422 dev_dbg(&client->dev, "Reading config values\n");
1424 for (i = 0; i <= 3; ++i) {
1426 lm85_read_value(client, LM85_REG_IN_MIN(i));
1428 lm85_read_value(client, LM85_REG_IN_MAX(i));
1430 lm85_read_value(client, LM85_REG_FAN_MIN(i));
1433 if (!(data->type == adt7463 && (data->vid & 0x80))) {
1434 data->in_min[4] = lm85_read_value(client,
1435 LM85_REG_IN_MIN(4));
1436 data->in_max[4] = lm85_read_value(client,
1437 LM85_REG_IN_MAX(4));
1440 if (data->type == emc6d100) {
1441 for (i = 5; i <= 7; ++i) {
1442 data->in_min[i] = lm85_read_value(client,
1443 EMC6D100_REG_IN_MIN(i));
1444 data->in_max[i] = lm85_read_value(client,
1445 EMC6D100_REG_IN_MAX(i));
1449 for (i = 0; i <= 2; ++i) {
1453 lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1455 lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1457 data->autofan[i].config =
1458 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1459 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1460 data->pwm_freq[i] = val & 0x07;
1461 data->zone[i].range = val >> 4;
1462 data->autofan[i].min_pwm =
1463 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1464 data->zone[i].limit =
1465 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1466 data->zone[i].critical =
1467 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1470 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1471 data->autofan[0].min_off = (i & 0x20) != 0;
1472 data->autofan[1].min_off = (i & 0x40) != 0;
1473 data->autofan[2].min_off = (i & 0x80) != 0;
1475 i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1476 data->zone[0].hyst = i >> 4;
1477 data->zone[1].hyst = i & 0x0f;
1479 i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1480 data->zone[2].hyst = i >> 4;
1482 data->last_config = jiffies;
1487 mutex_unlock(&data->update_lock);
1493 static int __init sm_lm85_init(void)
1495 return i2c_add_driver(&lm85_driver);
1498 static void __exit sm_lm85_exit(void)
1500 i2c_del_driver(&lm85_driver);
1503 MODULE_LICENSE("GPL");
1504 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1505 "Margit Schubert-While <margitsw@t-online.de>, "
1506 "Justin Thiessen <jthiessen@penguincomputing.com>");
1507 MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1509 module_init(sm_lm85_init);
1510 module_exit(sm_lm85_exit);