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_7(lm85b, lm85c, adm1027, adt7463, adt7468, emc6d100,
45 /* The LM85 registers */
47 #define LM85_REG_IN(nr) (0x20 + (nr))
48 #define LM85_REG_IN_MIN(nr) (0x44 + (nr) * 2)
49 #define LM85_REG_IN_MAX(nr) (0x45 + (nr) * 2)
51 #define LM85_REG_TEMP(nr) (0x25 + (nr))
52 #define LM85_REG_TEMP_MIN(nr) (0x4e + (nr) * 2)
53 #define LM85_REG_TEMP_MAX(nr) (0x4f + (nr) * 2)
55 /* Fan speeds are LSB, MSB (2 bytes) */
56 #define LM85_REG_FAN(nr) (0x28 + (nr) * 2)
57 #define LM85_REG_FAN_MIN(nr) (0x54 + (nr) * 2)
59 #define LM85_REG_PWM(nr) (0x30 + (nr))
61 #define LM85_REG_COMPANY 0x3e
62 #define LM85_REG_VERSTEP 0x3f
64 #define ADT7468_REG_CFG5 0x7c
65 #define ADT7468_OFF64 0x01
66 #define IS_ADT7468_OFF64(data) \
67 ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64))
69 /* These are the recognized values for the above regs */
70 #define LM85_COMPANY_NATIONAL 0x01
71 #define LM85_COMPANY_ANALOG_DEV 0x41
72 #define LM85_COMPANY_SMSC 0x5c
73 #define LM85_VERSTEP_VMASK 0xf0
74 #define LM85_VERSTEP_GENERIC 0x60
75 #define LM85_VERSTEP_GENERIC2 0x70
76 #define LM85_VERSTEP_LM85C 0x60
77 #define LM85_VERSTEP_LM85B 0x62
78 #define LM85_VERSTEP_ADM1027 0x60
79 #define LM85_VERSTEP_ADT7463 0x62
80 #define LM85_VERSTEP_ADT7463C 0x6A
81 #define LM85_VERSTEP_ADT7468_1 0x71
82 #define LM85_VERSTEP_ADT7468_2 0x72
83 #define LM85_VERSTEP_EMC6D100_A0 0x60
84 #define LM85_VERSTEP_EMC6D100_A1 0x61
85 #define LM85_VERSTEP_EMC6D102 0x65
87 #define LM85_REG_CONFIG 0x40
89 #define LM85_REG_ALARM1 0x41
90 #define LM85_REG_ALARM2 0x42
92 #define LM85_REG_VID 0x43
94 /* Automated FAN control */
95 #define LM85_REG_AFAN_CONFIG(nr) (0x5c + (nr))
96 #define LM85_REG_AFAN_RANGE(nr) (0x5f + (nr))
97 #define LM85_REG_AFAN_SPIKE1 0x62
98 #define LM85_REG_AFAN_MINPWM(nr) (0x64 + (nr))
99 #define LM85_REG_AFAN_LIMIT(nr) (0x67 + (nr))
100 #define LM85_REG_AFAN_CRITICAL(nr) (0x6a + (nr))
101 #define LM85_REG_AFAN_HYST1 0x6d
102 #define LM85_REG_AFAN_HYST2 0x6e
104 #define ADM1027_REG_EXTEND_ADC1 0x76
105 #define ADM1027_REG_EXTEND_ADC2 0x77
107 #define EMC6D100_REG_ALARM3 0x7d
108 /* IN5, IN6 and IN7 */
109 #define EMC6D100_REG_IN(nr) (0x70 + ((nr) - 5))
110 #define EMC6D100_REG_IN_MIN(nr) (0x73 + ((nr) - 5) * 2)
111 #define EMC6D100_REG_IN_MAX(nr) (0x74 + ((nr) - 5) * 2)
112 #define EMC6D102_REG_EXTEND_ADC1 0x85
113 #define EMC6D102_REG_EXTEND_ADC2 0x86
114 #define EMC6D102_REG_EXTEND_ADC3 0x87
115 #define EMC6D102_REG_EXTEND_ADC4 0x88
118 /* Conversions. Rounding and limit checking is only done on the TO_REG
119 variants. Note that you should be a bit careful with which arguments
120 these macros are called: arguments may be evaluated more than once.
123 /* IN are scaled acording to built-in resistors */
124 static const int lm85_scaling[] = { /* .001 Volts */
125 2500, 2250, 3300, 5000, 12000,
126 3300, 1500, 1800 /*EMC6D100*/
128 #define SCALE(val, from, to) (((val) * (to) + ((from) / 2)) / (from))
130 #define INS_TO_REG(n, val) \
131 SENSORS_LIMIT(SCALE(val, lm85_scaling[n], 192), 0, 255)
133 #define INSEXT_FROM_REG(n, val, ext) \
134 SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])
136 #define INS_FROM_REG(n, val) SCALE((val), 192, lm85_scaling[n])
138 /* FAN speed is measured using 90kHz clock */
139 static inline u16 FAN_TO_REG(unsigned long val)
143 return SENSORS_LIMIT(5400000 / val, 1, 0xfffe);
145 #define FAN_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
148 /* Temperature is reported in .001 degC increments */
149 #define TEMP_TO_REG(val) \
150 SENSORS_LIMIT(SCALE(val, 1000, 1), -127, 127)
151 #define TEMPEXT_FROM_REG(val, ext) \
152 SCALE(((val) << 4) + (ext), 16, 1000)
153 #define TEMP_FROM_REG(val) ((val) * 1000)
155 #define PWM_TO_REG(val) SENSORS_LIMIT(val, 0, 255)
156 #define PWM_FROM_REG(val) (val)
159 /* ZONEs have the following parameters:
160 * Limit (low) temp, 1. degC
161 * Hysteresis (below limit), 1. degC (0-15)
162 * Range of speed control, .1 degC (2-80)
163 * Critical (high) temp, 1. degC
165 * FAN PWMs have the following parameters:
166 * Reference Zone, 1, 2, 3, etc.
167 * Spinup time, .05 sec
168 * PWM value at limit/low temp, 1 count
169 * PWM Frequency, 1. Hz
170 * PWM is Min or OFF below limit, flag
171 * Invert PWM output, flag
173 * Some chips filter the temp, others the fan.
174 * Filter constant (or disabled) .1 seconds
177 /* These are the zone temperature range encodings in .001 degree C */
178 static const int lm85_range_map[] = {
179 2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
180 13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
183 static int RANGE_TO_REG(int range)
187 /* Find the closest match */
188 for (i = 0; i < 15; ++i) {
189 if (range <= (lm85_range_map[i] + lm85_range_map[i + 1]) / 2)
195 #define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
197 /* These are the PWM frequency encodings */
198 static const int lm85_freq_map[8] = { /* 1 Hz */
199 10, 15, 23, 30, 38, 47, 61, 94
201 static const int adm1027_freq_map[8] = { /* 1 Hz */
202 11, 15, 22, 29, 35, 44, 59, 88
205 static int FREQ_TO_REG(const int *map, int freq)
209 /* Find the closest match */
210 for (i = 0; i < 7; ++i)
211 if (freq <= (map[i] + map[i + 1]) / 2)
216 static int FREQ_FROM_REG(const int *map, u8 reg)
218 return map[reg & 0x07];
221 /* Since we can't use strings, I'm abusing these numbers
222 * to stand in for the following meanings:
223 * 1 -- PWM responds to Zone 1
224 * 2 -- PWM responds to Zone 2
225 * 3 -- PWM responds to Zone 3
226 * 23 -- PWM responds to the higher temp of Zone 2 or 3
227 * 123 -- PWM responds to highest of Zone 1, 2, or 3
228 * 0 -- PWM is always at 0% (ie, off)
229 * -1 -- PWM is always at 100%
230 * -2 -- PWM responds to manual control
233 static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
234 #define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5]
236 static int ZONE_TO_REG(int zone)
240 for (i = 0; i <= 7; ++i)
241 if (zone == lm85_zone_map[i])
243 if (i > 7) /* Not found. */
244 i = 3; /* Always 100% */
248 #define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15)
249 #define HYST_FROM_REG(val) ((val) * 1000)
251 /* Chip sampling rates
253 * Some sensors are not updated more frequently than once per second
254 * so it doesn't make sense to read them more often than that.
255 * We cache the results and return the saved data if the driver
256 * is called again before a second has elapsed.
258 * Also, there is significant configuration data for this chip
259 * given the automatic PWM fan control that is possible. There
260 * are about 47 bytes of config data to only 22 bytes of actual
261 * readings. So, we keep the config data up to date in the cache
262 * when it is written and only sample it once every 1 *minute*
264 #define LM85_DATA_INTERVAL (HZ + HZ / 2)
265 #define LM85_CONFIG_INTERVAL (1 * 60 * HZ)
267 /* LM85 can automatically adjust fan speeds based on temperature
268 * This structure encapsulates an entire Zone config. There are
269 * three zones (one for each temperature input) on the lm85
272 s8 limit; /* Low temp limit */
273 u8 hyst; /* Low limit hysteresis. (0-15) */
274 u8 range; /* Temp range, encoded */
275 s8 critical; /* "All fans ON" temp limit */
276 u8 off_desired; /* Actual "off" temperature specified. Preserved
277 * to prevent "drift" as other autofan control
280 u8 max_desired; /* Actual "max" temperature specified. Preserved
281 * to prevent "drift" as other autofan control
286 struct lm85_autofan {
287 u8 config; /* Register value */
288 u8 min_pwm; /* Minimum PWM value, encoded */
289 u8 min_off; /* Min PWM or OFF below "limit", flag */
292 /* For each registered chip, we need to keep some data in memory.
293 The structure is dynamically allocated. */
295 struct device *hwmon_dev;
299 struct mutex update_lock;
300 int valid; /* !=0 if following fields are valid */
301 unsigned long last_reading; /* In jiffies */
302 unsigned long last_config; /* In jiffies */
304 u8 in[8]; /* Register value */
305 u8 in_max[8]; /* Register value */
306 u8 in_min[8]; /* Register value */
307 s8 temp[3]; /* Register value */
308 s8 temp_min[3]; /* Register value */
309 s8 temp_max[3]; /* Register value */
310 u16 fan[4]; /* Register value */
311 u16 fan_min[4]; /* Register value */
312 u8 pwm[3]; /* Register value */
313 u8 pwm_freq[3]; /* Register encoding */
314 u8 temp_ext[3]; /* Decoded values */
315 u8 in_ext[8]; /* Decoded values */
316 u8 vid; /* Register value */
317 u8 vrm; /* VRM version */
318 u32 alarms; /* Register encoding, combined */
319 u8 cfg5; /* Config Register 5 on ADT7468 */
320 struct lm85_autofan autofan[3];
321 struct lm85_zone zone[3];
324 static int lm85_detect(struct i2c_client *client, int kind,
325 struct i2c_board_info *info);
326 static int lm85_probe(struct i2c_client *client,
327 const struct i2c_device_id *id);
328 static int lm85_remove(struct i2c_client *client);
330 static int lm85_read_value(struct i2c_client *client, u8 reg);
331 static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
332 static struct lm85_data *lm85_update_device(struct device *dev);
335 static const struct i2c_device_id lm85_id[] = {
336 { "adm1027", adm1027 },
337 { "adt7463", adt7463 },
338 { "adt7468", adt7468 },
339 { "lm85", any_chip },
342 { "emc6d100", emc6d100 },
343 { "emc6d101", emc6d100 },
344 { "emc6d102", emc6d102 },
347 MODULE_DEVICE_TABLE(i2c, lm85_id);
349 static struct i2c_driver lm85_driver = {
350 .class = I2C_CLASS_HWMON,
355 .remove = lm85_remove,
357 .detect = lm85_detect,
358 .address_data = &addr_data,
363 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
366 int nr = to_sensor_dev_attr(attr)->index;
367 struct lm85_data *data = lm85_update_device(dev);
368 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
371 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
374 int nr = to_sensor_dev_attr(attr)->index;
375 struct lm85_data *data = lm85_update_device(dev);
376 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr]));
379 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
380 const char *buf, size_t count)
382 int nr = to_sensor_dev_attr(attr)->index;
383 struct i2c_client *client = to_i2c_client(dev);
384 struct lm85_data *data = i2c_get_clientdata(client);
385 unsigned long val = simple_strtoul(buf, NULL, 10);
387 mutex_lock(&data->update_lock);
388 data->fan_min[nr] = FAN_TO_REG(val);
389 lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
390 mutex_unlock(&data->update_lock);
394 #define show_fan_offset(offset) \
395 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
396 show_fan, NULL, offset - 1); \
397 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
398 show_fan_min, set_fan_min, offset - 1)
405 /* vid, vrm, alarms */
407 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
410 struct lm85_data *data = lm85_update_device(dev);
413 if (data->type == adt7463 && (data->vid & 0x80)) {
414 /* 6-pin VID (VRM 10) */
415 vid = vid_from_reg(data->vid & 0x3f, data->vrm);
417 /* 5-pin VID (VRM 9) */
418 vid = vid_from_reg(data->vid & 0x1f, data->vrm);
421 return sprintf(buf, "%d\n", vid);
424 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
426 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
429 struct lm85_data *data = dev_get_drvdata(dev);
430 return sprintf(buf, "%ld\n", (long) data->vrm);
433 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
434 const char *buf, size_t count)
436 struct lm85_data *data = dev_get_drvdata(dev);
437 data->vrm = simple_strtoul(buf, NULL, 10);
441 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
443 static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
446 struct lm85_data *data = lm85_update_device(dev);
447 return sprintf(buf, "%u\n", data->alarms);
450 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
452 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
455 int nr = to_sensor_dev_attr(attr)->index;
456 struct lm85_data *data = lm85_update_device(dev);
457 return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
460 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
461 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
462 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
463 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
464 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
465 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
466 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
467 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
468 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
469 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
470 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
471 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
472 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
473 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
474 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
475 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
476 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
480 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
483 int nr = to_sensor_dev_attr(attr)->index;
484 struct lm85_data *data = lm85_update_device(dev);
485 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
488 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
489 const char *buf, size_t count)
491 int nr = to_sensor_dev_attr(attr)->index;
492 struct i2c_client *client = to_i2c_client(dev);
493 struct lm85_data *data = i2c_get_clientdata(client);
494 long val = simple_strtol(buf, NULL, 10);
496 mutex_lock(&data->update_lock);
497 data->pwm[nr] = PWM_TO_REG(val);
498 lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
499 mutex_unlock(&data->update_lock);
503 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
506 int nr = to_sensor_dev_attr(attr)->index;
507 struct lm85_data *data = lm85_update_device(dev);
508 int pwm_zone, enable;
510 pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
512 case -1: /* PWM is always at 100% */
515 case 0: /* PWM is always at 0% */
516 case -2: /* PWM responds to manual control */
519 default: /* PWM in automatic mode */
522 return sprintf(buf, "%d\n", enable);
525 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
526 *attr, const char *buf, size_t count)
528 int nr = to_sensor_dev_attr(attr)->index;
529 struct i2c_client *client = to_i2c_client(dev);
530 struct lm85_data *data = i2c_get_clientdata(client);
531 long val = simple_strtol(buf, NULL, 10);
542 /* Here we have to choose arbitrarily one of the 5 possible
543 configurations; I go for the safest */
550 mutex_lock(&data->update_lock);
551 data->autofan[nr].config = lm85_read_value(client,
552 LM85_REG_AFAN_CONFIG(nr));
553 data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
555 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
556 data->autofan[nr].config);
557 mutex_unlock(&data->update_lock);
561 static ssize_t show_pwm_freq(struct device *dev,
562 struct device_attribute *attr, char *buf)
564 int nr = to_sensor_dev_attr(attr)->index;
565 struct lm85_data *data = lm85_update_device(dev);
566 return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map,
567 data->pwm_freq[nr]));
570 static ssize_t set_pwm_freq(struct device *dev,
571 struct device_attribute *attr, const char *buf, size_t count)
573 int nr = to_sensor_dev_attr(attr)->index;
574 struct i2c_client *client = to_i2c_client(dev);
575 struct lm85_data *data = i2c_get_clientdata(client);
576 long val = simple_strtol(buf, NULL, 10);
578 mutex_lock(&data->update_lock);
579 data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
580 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
581 (data->zone[nr].range << 4)
582 | data->pwm_freq[nr]);
583 mutex_unlock(&data->update_lock);
587 #define show_pwm_reg(offset) \
588 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
589 show_pwm, set_pwm, offset - 1); \
590 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
591 show_pwm_enable, set_pwm_enable, offset - 1); \
592 static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
593 show_pwm_freq, set_pwm_freq, offset - 1)
601 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
604 int nr = to_sensor_dev_attr(attr)->index;
605 struct lm85_data *data = lm85_update_device(dev);
606 return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
610 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
613 int nr = to_sensor_dev_attr(attr)->index;
614 struct lm85_data *data = lm85_update_device(dev);
615 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
618 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
619 const char *buf, size_t count)
621 int nr = to_sensor_dev_attr(attr)->index;
622 struct i2c_client *client = to_i2c_client(dev);
623 struct lm85_data *data = i2c_get_clientdata(client);
624 long val = simple_strtol(buf, NULL, 10);
626 mutex_lock(&data->update_lock);
627 data->in_min[nr] = INS_TO_REG(nr, val);
628 lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
629 mutex_unlock(&data->update_lock);
633 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
636 int nr = to_sensor_dev_attr(attr)->index;
637 struct lm85_data *data = lm85_update_device(dev);
638 return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
641 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
642 const char *buf, size_t count)
644 int nr = to_sensor_dev_attr(attr)->index;
645 struct i2c_client *client = to_i2c_client(dev);
646 struct lm85_data *data = i2c_get_clientdata(client);
647 long val = simple_strtol(buf, NULL, 10);
649 mutex_lock(&data->update_lock);
650 data->in_max[nr] = INS_TO_REG(nr, val);
651 lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
652 mutex_unlock(&data->update_lock);
656 #define show_in_reg(offset) \
657 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
658 show_in, NULL, offset); \
659 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
660 show_in_min, set_in_min, offset); \
661 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
662 show_in_max, set_in_max, offset)
675 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
678 int nr = to_sensor_dev_attr(attr)->index;
679 struct lm85_data *data = lm85_update_device(dev);
680 return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
681 data->temp_ext[nr]));
684 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
687 int nr = to_sensor_dev_attr(attr)->index;
688 struct lm85_data *data = lm85_update_device(dev);
689 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
692 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
693 const char *buf, size_t count)
695 int nr = to_sensor_dev_attr(attr)->index;
696 struct i2c_client *client = to_i2c_client(dev);
697 struct lm85_data *data = i2c_get_clientdata(client);
698 long val = simple_strtol(buf, NULL, 10);
700 if (IS_ADT7468_OFF64(data))
703 mutex_lock(&data->update_lock);
704 data->temp_min[nr] = TEMP_TO_REG(val);
705 lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
706 mutex_unlock(&data->update_lock);
710 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
713 int nr = to_sensor_dev_attr(attr)->index;
714 struct lm85_data *data = lm85_update_device(dev);
715 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
718 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
719 const char *buf, size_t count)
721 int nr = to_sensor_dev_attr(attr)->index;
722 struct i2c_client *client = to_i2c_client(dev);
723 struct lm85_data *data = i2c_get_clientdata(client);
724 long val = simple_strtol(buf, NULL, 10);
726 if (IS_ADT7468_OFF64(data))
729 mutex_lock(&data->update_lock);
730 data->temp_max[nr] = TEMP_TO_REG(val);
731 lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
732 mutex_unlock(&data->update_lock);
736 #define show_temp_reg(offset) \
737 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
738 show_temp, NULL, offset - 1); \
739 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
740 show_temp_min, set_temp_min, offset - 1); \
741 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
742 show_temp_max, set_temp_max, offset - 1);
749 /* Automatic PWM control */
751 static ssize_t show_pwm_auto_channels(struct device *dev,
752 struct device_attribute *attr, char *buf)
754 int nr = to_sensor_dev_attr(attr)->index;
755 struct lm85_data *data = lm85_update_device(dev);
756 return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
759 static ssize_t set_pwm_auto_channels(struct device *dev,
760 struct device_attribute *attr, const char *buf, size_t count)
762 int nr = to_sensor_dev_attr(attr)->index;
763 struct i2c_client *client = to_i2c_client(dev);
764 struct lm85_data *data = i2c_get_clientdata(client);
765 long val = simple_strtol(buf, NULL, 10);
767 mutex_lock(&data->update_lock);
768 data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
770 lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
771 data->autofan[nr].config);
772 mutex_unlock(&data->update_lock);
776 static ssize_t show_pwm_auto_pwm_min(struct device *dev,
777 struct device_attribute *attr, char *buf)
779 int nr = to_sensor_dev_attr(attr)->index;
780 struct lm85_data *data = lm85_update_device(dev);
781 return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
784 static ssize_t set_pwm_auto_pwm_min(struct device *dev,
785 struct device_attribute *attr, const char *buf, size_t count)
787 int nr = to_sensor_dev_attr(attr)->index;
788 struct i2c_client *client = to_i2c_client(dev);
789 struct lm85_data *data = i2c_get_clientdata(client);
790 long val = simple_strtol(buf, NULL, 10);
792 mutex_lock(&data->update_lock);
793 data->autofan[nr].min_pwm = PWM_TO_REG(val);
794 lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
795 data->autofan[nr].min_pwm);
796 mutex_unlock(&data->update_lock);
800 static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
801 struct device_attribute *attr, char *buf)
803 int nr = to_sensor_dev_attr(attr)->index;
804 struct lm85_data *data = lm85_update_device(dev);
805 return sprintf(buf, "%d\n", data->autofan[nr].min_off);
808 static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
809 struct device_attribute *attr, const char *buf, size_t count)
811 int nr = to_sensor_dev_attr(attr)->index;
812 struct i2c_client *client = to_i2c_client(dev);
813 struct lm85_data *data = i2c_get_clientdata(client);
814 long val = simple_strtol(buf, NULL, 10);
817 mutex_lock(&data->update_lock);
818 data->autofan[nr].min_off = val;
819 tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
820 tmp &= ~(0x20 << nr);
821 if (data->autofan[nr].min_off)
823 lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
824 mutex_unlock(&data->update_lock);
828 #define pwm_auto(offset) \
829 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
830 S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
831 set_pwm_auto_channels, offset - 1); \
832 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
833 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min, \
834 set_pwm_auto_pwm_min, offset - 1); \
835 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
836 S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
837 set_pwm_auto_pwm_minctl, offset - 1)
843 /* Temperature settings for automatic PWM control */
845 static ssize_t show_temp_auto_temp_off(struct device *dev,
846 struct device_attribute *attr, char *buf)
848 int nr = to_sensor_dev_attr(attr)->index;
849 struct lm85_data *data = lm85_update_device(dev);
850 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
851 HYST_FROM_REG(data->zone[nr].hyst));
854 static ssize_t set_temp_auto_temp_off(struct device *dev,
855 struct device_attribute *attr, const char *buf, size_t count)
857 int nr = to_sensor_dev_attr(attr)->index;
858 struct i2c_client *client = to_i2c_client(dev);
859 struct lm85_data *data = i2c_get_clientdata(client);
861 long val = simple_strtol(buf, NULL, 10);
863 mutex_lock(&data->update_lock);
864 min = TEMP_FROM_REG(data->zone[nr].limit);
865 data->zone[nr].off_desired = TEMP_TO_REG(val);
866 data->zone[nr].hyst = HYST_TO_REG(min - val);
867 if (nr == 0 || nr == 1) {
868 lm85_write_value(client, LM85_REG_AFAN_HYST1,
869 (data->zone[0].hyst << 4)
870 | data->zone[1].hyst);
872 lm85_write_value(client, LM85_REG_AFAN_HYST2,
873 (data->zone[2].hyst << 4));
875 mutex_unlock(&data->update_lock);
879 static ssize_t show_temp_auto_temp_min(struct device *dev,
880 struct device_attribute *attr, char *buf)
882 int nr = to_sensor_dev_attr(attr)->index;
883 struct lm85_data *data = lm85_update_device(dev);
884 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
887 static ssize_t set_temp_auto_temp_min(struct device *dev,
888 struct device_attribute *attr, const char *buf, size_t count)
890 int nr = to_sensor_dev_attr(attr)->index;
891 struct i2c_client *client = to_i2c_client(dev);
892 struct lm85_data *data = i2c_get_clientdata(client);
893 long val = simple_strtol(buf, NULL, 10);
895 mutex_lock(&data->update_lock);
896 data->zone[nr].limit = TEMP_TO_REG(val);
897 lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
898 data->zone[nr].limit);
900 /* Update temp_auto_max and temp_auto_range */
901 data->zone[nr].range = RANGE_TO_REG(
902 TEMP_FROM_REG(data->zone[nr].max_desired) -
903 TEMP_FROM_REG(data->zone[nr].limit));
904 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
905 ((data->zone[nr].range & 0x0f) << 4)
906 | (data->pwm_freq[nr] & 0x07));
908 /* Update temp_auto_hyst and temp_auto_off */
909 data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
910 data->zone[nr].limit) - TEMP_FROM_REG(
911 data->zone[nr].off_desired));
912 if (nr == 0 || nr == 1) {
913 lm85_write_value(client, LM85_REG_AFAN_HYST1,
914 (data->zone[0].hyst << 4)
915 | data->zone[1].hyst);
917 lm85_write_value(client, LM85_REG_AFAN_HYST2,
918 (data->zone[2].hyst << 4));
920 mutex_unlock(&data->update_lock);
924 static ssize_t show_temp_auto_temp_max(struct device *dev,
925 struct device_attribute *attr, char *buf)
927 int nr = to_sensor_dev_attr(attr)->index;
928 struct lm85_data *data = lm85_update_device(dev);
929 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
930 RANGE_FROM_REG(data->zone[nr].range));
933 static ssize_t set_temp_auto_temp_max(struct device *dev,
934 struct device_attribute *attr, const char *buf, size_t count)
936 int nr = to_sensor_dev_attr(attr)->index;
937 struct i2c_client *client = to_i2c_client(dev);
938 struct lm85_data *data = i2c_get_clientdata(client);
940 long val = simple_strtol(buf, NULL, 10);
942 mutex_lock(&data->update_lock);
943 min = TEMP_FROM_REG(data->zone[nr].limit);
944 data->zone[nr].max_desired = TEMP_TO_REG(val);
945 data->zone[nr].range = RANGE_TO_REG(
947 lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
948 ((data->zone[nr].range & 0x0f) << 4)
949 | (data->pwm_freq[nr] & 0x07));
950 mutex_unlock(&data->update_lock);
954 static ssize_t show_temp_auto_temp_crit(struct device *dev,
955 struct device_attribute *attr, char *buf)
957 int nr = to_sensor_dev_attr(attr)->index;
958 struct lm85_data *data = lm85_update_device(dev);
959 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
962 static ssize_t set_temp_auto_temp_crit(struct device *dev,
963 struct device_attribute *attr, const char *buf, size_t count)
965 int nr = to_sensor_dev_attr(attr)->index;
966 struct i2c_client *client = to_i2c_client(dev);
967 struct lm85_data *data = i2c_get_clientdata(client);
968 long val = simple_strtol(buf, NULL, 10);
970 mutex_lock(&data->update_lock);
971 data->zone[nr].critical = TEMP_TO_REG(val);
972 lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
973 data->zone[nr].critical);
974 mutex_unlock(&data->update_lock);
978 #define temp_auto(offset) \
979 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off, \
980 S_IRUGO | S_IWUSR, show_temp_auto_temp_off, \
981 set_temp_auto_temp_off, offset - 1); \
982 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min, \
983 S_IRUGO | S_IWUSR, show_temp_auto_temp_min, \
984 set_temp_auto_temp_min, offset - 1); \
985 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max, \
986 S_IRUGO | S_IWUSR, show_temp_auto_temp_max, \
987 set_temp_auto_temp_max, offset - 1); \
988 static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit, \
989 S_IRUGO | S_IWUSR, show_temp_auto_temp_crit, \
990 set_temp_auto_temp_crit, offset - 1);
996 static struct attribute *lm85_attributes[] = {
997 &sensor_dev_attr_fan1_input.dev_attr.attr,
998 &sensor_dev_attr_fan2_input.dev_attr.attr,
999 &sensor_dev_attr_fan3_input.dev_attr.attr,
1000 &sensor_dev_attr_fan4_input.dev_attr.attr,
1001 &sensor_dev_attr_fan1_min.dev_attr.attr,
1002 &sensor_dev_attr_fan2_min.dev_attr.attr,
1003 &sensor_dev_attr_fan3_min.dev_attr.attr,
1004 &sensor_dev_attr_fan4_min.dev_attr.attr,
1005 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1006 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1007 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1008 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1010 &sensor_dev_attr_pwm1.dev_attr.attr,
1011 &sensor_dev_attr_pwm2.dev_attr.attr,
1012 &sensor_dev_attr_pwm3.dev_attr.attr,
1013 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1014 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1015 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1016 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1017 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1018 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1020 &sensor_dev_attr_in0_input.dev_attr.attr,
1021 &sensor_dev_attr_in1_input.dev_attr.attr,
1022 &sensor_dev_attr_in2_input.dev_attr.attr,
1023 &sensor_dev_attr_in3_input.dev_attr.attr,
1024 &sensor_dev_attr_in0_min.dev_attr.attr,
1025 &sensor_dev_attr_in1_min.dev_attr.attr,
1026 &sensor_dev_attr_in2_min.dev_attr.attr,
1027 &sensor_dev_attr_in3_min.dev_attr.attr,
1028 &sensor_dev_attr_in0_max.dev_attr.attr,
1029 &sensor_dev_attr_in1_max.dev_attr.attr,
1030 &sensor_dev_attr_in2_max.dev_attr.attr,
1031 &sensor_dev_attr_in3_max.dev_attr.attr,
1032 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1033 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1034 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1035 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1037 &sensor_dev_attr_temp1_input.dev_attr.attr,
1038 &sensor_dev_attr_temp2_input.dev_attr.attr,
1039 &sensor_dev_attr_temp3_input.dev_attr.attr,
1040 &sensor_dev_attr_temp1_min.dev_attr.attr,
1041 &sensor_dev_attr_temp2_min.dev_attr.attr,
1042 &sensor_dev_attr_temp3_min.dev_attr.attr,
1043 &sensor_dev_attr_temp1_max.dev_attr.attr,
1044 &sensor_dev_attr_temp2_max.dev_attr.attr,
1045 &sensor_dev_attr_temp3_max.dev_attr.attr,
1046 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1047 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1048 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1049 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1050 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1052 &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1053 &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1054 &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1055 &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1056 &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1057 &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1058 &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1059 &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1060 &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1062 &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1063 &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1064 &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1065 &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1066 &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1067 &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1068 &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1069 &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1070 &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1071 &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1072 &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1073 &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1076 &dev_attr_cpu0_vid.attr,
1077 &dev_attr_alarms.attr,
1081 static const struct attribute_group lm85_group = {
1082 .attrs = lm85_attributes,
1085 static struct attribute *lm85_attributes_in4[] = {
1086 &sensor_dev_attr_in4_input.dev_attr.attr,
1087 &sensor_dev_attr_in4_min.dev_attr.attr,
1088 &sensor_dev_attr_in4_max.dev_attr.attr,
1089 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1093 static const struct attribute_group lm85_group_in4 = {
1094 .attrs = lm85_attributes_in4,
1097 static struct attribute *lm85_attributes_in567[] = {
1098 &sensor_dev_attr_in5_input.dev_attr.attr,
1099 &sensor_dev_attr_in6_input.dev_attr.attr,
1100 &sensor_dev_attr_in7_input.dev_attr.attr,
1101 &sensor_dev_attr_in5_min.dev_attr.attr,
1102 &sensor_dev_attr_in6_min.dev_attr.attr,
1103 &sensor_dev_attr_in7_min.dev_attr.attr,
1104 &sensor_dev_attr_in5_max.dev_attr.attr,
1105 &sensor_dev_attr_in6_max.dev_attr.attr,
1106 &sensor_dev_attr_in7_max.dev_attr.attr,
1107 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1108 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1109 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1113 static const struct attribute_group lm85_group_in567 = {
1114 .attrs = lm85_attributes_in567,
1117 static void lm85_init_client(struct i2c_client *client)
1121 /* Start monitoring if needed */
1122 value = lm85_read_value(client, LM85_REG_CONFIG);
1123 if (!(value & 0x01)) {
1124 dev_info(&client->dev, "Starting monitoring\n");
1125 lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1128 /* Warn about unusual configuration bits */
1130 dev_warn(&client->dev, "Device configuration is locked\n");
1131 if (!(value & 0x04))
1132 dev_warn(&client->dev, "Device is not ready\n");
1135 /* Return 0 if detection is successful, -ENODEV otherwise */
1136 static int lm85_detect(struct i2c_client *client, int kind,
1137 struct i2c_board_info *info)
1139 struct i2c_adapter *adapter = client->adapter;
1140 int address = client->addr;
1141 const char *type_name;
1143 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1144 /* We need to be able to do byte I/O */
1148 /* If auto-detecting, determine the chip type */
1150 int company = lm85_read_value(client, LM85_REG_COMPANY);
1151 int verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1153 dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1154 "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1155 address, company, verstep);
1157 /* All supported chips have the version in common */
1158 if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC &&
1159 (verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC2) {
1160 dev_dbg(&adapter->dev, "Autodetection failed: "
1161 "unsupported version\n");
1166 /* Now, refine the detection */
1167 if (company == LM85_COMPANY_NATIONAL) {
1169 case LM85_VERSTEP_LM85C:
1172 case LM85_VERSTEP_LM85B:
1176 } else if (company == LM85_COMPANY_ANALOG_DEV) {
1178 case LM85_VERSTEP_ADM1027:
1181 case LM85_VERSTEP_ADT7463:
1182 case LM85_VERSTEP_ADT7463C:
1185 case LM85_VERSTEP_ADT7468_1:
1186 case LM85_VERSTEP_ADT7468_2:
1190 } else if (company == LM85_COMPANY_SMSC) {
1192 case LM85_VERSTEP_EMC6D100_A0:
1193 case LM85_VERSTEP_EMC6D100_A1:
1194 /* Note: we can't tell a '100 from a '101 */
1197 case LM85_VERSTEP_EMC6D102:
1202 dev_dbg(&adapter->dev, "Autodetection failed: "
1203 "unknown vendor\n");
1210 type_name = "lm85b";
1213 type_name = "lm85c";
1216 type_name = "adm1027";
1219 type_name = "adt7463";
1222 type_name = "adt7468";
1225 type_name = "emc6d100";
1228 type_name = "emc6d102";
1233 strlcpy(info->type, type_name, I2C_NAME_SIZE);
1238 static int lm85_probe(struct i2c_client *client,
1239 const struct i2c_device_id *id)
1241 struct lm85_data *data;
1244 data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL);
1248 i2c_set_clientdata(client, data);
1249 data->type = id->driver_data;
1250 mutex_init(&data->update_lock);
1252 /* Fill in the chip specific driver values */
1253 switch (data->type) {
1258 data->freq_map = adm1027_freq_map;
1261 data->freq_map = lm85_freq_map;
1264 /* Set the VRM version */
1265 data->vrm = vid_which_vrm();
1267 /* Initialize the LM85 chip */
1268 lm85_init_client(client);
1270 /* Register sysfs hooks */
1271 err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1275 /* The ADT7463/68 have an optional VRM 10 mode where pin 21 is used
1276 as a sixth digital VID input rather than an analog input. */
1277 data->vid = lm85_read_value(client, LM85_REG_VID);
1278 if (!((data->type == adt7463 || data->type == adt7468) &&
1279 (data->vid & 0x80)))
1280 if ((err = sysfs_create_group(&client->dev.kobj,
1282 goto err_remove_files;
1284 /* The EMC6D100 has 3 additional voltage inputs */
1285 if (data->type == emc6d100)
1286 if ((err = sysfs_create_group(&client->dev.kobj,
1287 &lm85_group_in567)))
1288 goto err_remove_files;
1290 data->hwmon_dev = hwmon_device_register(&client->dev);
1291 if (IS_ERR(data->hwmon_dev)) {
1292 err = PTR_ERR(data->hwmon_dev);
1293 goto err_remove_files;
1298 /* Error out and cleanup code */
1300 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1301 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1302 if (data->type == emc6d100)
1303 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1309 static int lm85_remove(struct i2c_client *client)
1311 struct lm85_data *data = i2c_get_clientdata(client);
1312 hwmon_device_unregister(data->hwmon_dev);
1313 sysfs_remove_group(&client->dev.kobj, &lm85_group);
1314 sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1315 if (data->type == emc6d100)
1316 sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1322 static int lm85_read_value(struct i2c_client *client, u8 reg)
1326 /* What size location is it? */
1328 case LM85_REG_FAN(0): /* Read WORD data */
1329 case LM85_REG_FAN(1):
1330 case LM85_REG_FAN(2):
1331 case LM85_REG_FAN(3):
1332 case LM85_REG_FAN_MIN(0):
1333 case LM85_REG_FAN_MIN(1):
1334 case LM85_REG_FAN_MIN(2):
1335 case LM85_REG_FAN_MIN(3):
1336 case LM85_REG_ALARM1: /* Read both bytes at once */
1337 res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1338 res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1340 default: /* Read BYTE data */
1341 res = i2c_smbus_read_byte_data(client, reg);
1348 static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1351 case LM85_REG_FAN(0): /* Write WORD data */
1352 case LM85_REG_FAN(1):
1353 case LM85_REG_FAN(2):
1354 case LM85_REG_FAN(3):
1355 case LM85_REG_FAN_MIN(0):
1356 case LM85_REG_FAN_MIN(1):
1357 case LM85_REG_FAN_MIN(2):
1358 case LM85_REG_FAN_MIN(3):
1359 /* NOTE: ALARM is read only, so not included here */
1360 i2c_smbus_write_byte_data(client, reg, value & 0xff);
1361 i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1363 default: /* Write BYTE data */
1364 i2c_smbus_write_byte_data(client, reg, value);
1369 static struct lm85_data *lm85_update_device(struct device *dev)
1371 struct i2c_client *client = to_i2c_client(dev);
1372 struct lm85_data *data = i2c_get_clientdata(client);
1375 mutex_lock(&data->update_lock);
1378 time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1379 /* Things that change quickly */
1380 dev_dbg(&client->dev, "Reading sensor values\n");
1382 /* Have to read extended bits first to "freeze" the
1383 * more significant bits that are read later.
1384 * There are 2 additional resolution bits per channel and we
1385 * have room for 4, so we shift them to the left.
1387 if (data->type == adm1027 || data->type == adt7463 ||
1388 data->type == adt7468) {
1389 int ext1 = lm85_read_value(client,
1390 ADM1027_REG_EXTEND_ADC1);
1391 int ext2 = lm85_read_value(client,
1392 ADM1027_REG_EXTEND_ADC2);
1393 int val = (ext1 << 8) + ext2;
1395 for (i = 0; i <= 4; i++)
1397 ((val >> (i * 2)) & 0x03) << 2;
1399 for (i = 0; i <= 2; i++)
1401 (val >> ((i + 4) * 2)) & 0x0c;
1404 data->vid = lm85_read_value(client, LM85_REG_VID);
1406 for (i = 0; i <= 3; ++i) {
1408 lm85_read_value(client, LM85_REG_IN(i));
1410 lm85_read_value(client, LM85_REG_FAN(i));
1413 if (!((data->type == adt7463 || data->type == adt7468) &&
1414 (data->vid & 0x80))) {
1415 data->in[4] = lm85_read_value(client,
1419 if (data->type == adt7468)
1420 data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5);
1422 for (i = 0; i <= 2; ++i) {
1424 lm85_read_value(client, LM85_REG_TEMP(i));
1426 lm85_read_value(client, LM85_REG_PWM(i));
1428 if (IS_ADT7468_OFF64(data))
1429 data->temp[i] -= 64;
1432 data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1434 if (data->type == emc6d100) {
1435 /* Three more voltage sensors */
1436 for (i = 5; i <= 7; ++i) {
1437 data->in[i] = lm85_read_value(client,
1438 EMC6D100_REG_IN(i));
1440 /* More alarm bits */
1441 data->alarms |= lm85_read_value(client,
1442 EMC6D100_REG_ALARM3) << 16;
1443 } else if (data->type == emc6d102) {
1444 /* Have to read LSB bits after the MSB ones because
1445 the reading of the MSB bits has frozen the
1446 LSBs (backward from the ADM1027).
1448 int ext1 = lm85_read_value(client,
1449 EMC6D102_REG_EXTEND_ADC1);
1450 int ext2 = lm85_read_value(client,
1451 EMC6D102_REG_EXTEND_ADC2);
1452 int ext3 = lm85_read_value(client,
1453 EMC6D102_REG_EXTEND_ADC3);
1454 int ext4 = lm85_read_value(client,
1455 EMC6D102_REG_EXTEND_ADC4);
1456 data->in_ext[0] = ext3 & 0x0f;
1457 data->in_ext[1] = ext4 & 0x0f;
1458 data->in_ext[2] = ext4 >> 4;
1459 data->in_ext[3] = ext3 >> 4;
1460 data->in_ext[4] = ext2 >> 4;
1462 data->temp_ext[0] = ext1 & 0x0f;
1463 data->temp_ext[1] = ext2 & 0x0f;
1464 data->temp_ext[2] = ext1 >> 4;
1467 data->last_reading = jiffies;
1468 } /* last_reading */
1471 time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1472 /* Things that don't change often */
1473 dev_dbg(&client->dev, "Reading config values\n");
1475 for (i = 0; i <= 3; ++i) {
1477 lm85_read_value(client, LM85_REG_IN_MIN(i));
1479 lm85_read_value(client, LM85_REG_IN_MAX(i));
1481 lm85_read_value(client, LM85_REG_FAN_MIN(i));
1484 if (!((data->type == adt7463 || data->type == adt7468) &&
1485 (data->vid & 0x80))) {
1486 data->in_min[4] = lm85_read_value(client,
1487 LM85_REG_IN_MIN(4));
1488 data->in_max[4] = lm85_read_value(client,
1489 LM85_REG_IN_MAX(4));
1492 if (data->type == emc6d100) {
1493 for (i = 5; i <= 7; ++i) {
1494 data->in_min[i] = lm85_read_value(client,
1495 EMC6D100_REG_IN_MIN(i));
1496 data->in_max[i] = lm85_read_value(client,
1497 EMC6D100_REG_IN_MAX(i));
1501 for (i = 0; i <= 2; ++i) {
1505 lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1507 lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1509 data->autofan[i].config =
1510 lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1511 val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1512 data->pwm_freq[i] = val & 0x07;
1513 data->zone[i].range = val >> 4;
1514 data->autofan[i].min_pwm =
1515 lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1516 data->zone[i].limit =
1517 lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1518 data->zone[i].critical =
1519 lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1521 if (IS_ADT7468_OFF64(data)) {
1522 data->temp_min[i] -= 64;
1523 data->temp_max[i] -= 64;
1524 data->zone[i].limit -= 64;
1525 data->zone[i].critical -= 64;
1529 i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1530 data->autofan[0].min_off = (i & 0x20) != 0;
1531 data->autofan[1].min_off = (i & 0x40) != 0;
1532 data->autofan[2].min_off = (i & 0x80) != 0;
1534 i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1535 data->zone[0].hyst = i >> 4;
1536 data->zone[1].hyst = i & 0x0f;
1538 i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1539 data->zone[2].hyst = i >> 4;
1541 data->last_config = jiffies;
1546 mutex_unlock(&data->update_lock);
1552 static int __init sm_lm85_init(void)
1554 return i2c_add_driver(&lm85_driver);
1557 static void __exit sm_lm85_exit(void)
1559 i2c_del_driver(&lm85_driver);
1562 MODULE_LICENSE("GPL");
1563 MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1564 "Margit Schubert-While <margitsw@t-online.de>, "
1565 "Justin Thiessen <jthiessen@penguincomputing.com>");
1566 MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1568 module_init(sm_lm85_init);
1569 module_exit(sm_lm85_exit);